Udi Dahan   Udi Dahan – The Software Simplist
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Training for this winter

Friday, October 12th, 2012

I wanted to let you know that registration has opened for several new locations this winter – this time, some courses will even be delivered in Spanish.

Spain

Marçal Serrate will be teaching the Enterprise Development with NServiceBus course in Spanish in:

Marçal has been working with NServiceBus for a couple of years now building a very large system for an insurance company and knows all the ins and outs of taking NServiceBus live at scale – including all the infrastructure issues of big deployments.

We’re very happy to have him bringing NServiceBus to the Spanish-speaking community.

Other locations

Jimmy Bogard will be giving the next NServiceBus course in Austin in 2 weeks – Oct 23 and then heading over to London to teach it with our good friends from Skills Matter on Dec 4.

SOA – US, UK, AU, IL, DE

In addition to teaching my 5-day course in Miami on Nov 5, I’ll also be dropping by the Tallahassee Code Camp as a guest on the Dot Net Rocks Road Trip, so if you’re in the area, come by and say hello.

I’m also going to be teaching my course in Denver Colorado early next year, Jan 14 and it’ll be my first time there. I’m still looking for the right venue so if you have any recommendations, I’d love to hear them.

Of course, I will be back in London one more time this year, Dec 3 and won’t be forgetting my local peeps in Israel either – that’s on Dec 23.

Since I had such a wonderful time in Germany last time, I’ll also be back again next year on Jan 28 because who couldn’t appreciate a venue like the Hackers Hotel, not just for its name, but the chairs in the dining room are kind of like thrones – makes you feel like you’re getting the royal treatment.

Finally, for the guys down-under – this time I’m going to Perth. The past 3 years were always Sydney, Sydney, Sydney and I think that I should see more of the country. We’ve just about finalized the venue with Cliftons but figured that we might as well open up registration too – the course will be on Feb 11.

In closing

Yes, just like this past year, I’ll be travelling quite a bit – trying to get the good word out. I hope you’ll be able to make one of these dates – it’s always great meeting some of my long-time blog readers.

One time I gave the course this year, and there wasn’t a single person who’d read my blog there – and in a public course, no less! Not that I’m complaining, of course, because often times people who’ve already been on the course recommend it to their colleagues who might not be big blog readers, but it was kind of a surreal moment for me.

Anyway, that’s all the announcements for now.

If you need the full information on these courses, you can see it all up on my training page here.



Dennis does High Availability, the full story

Thursday, September 20th, 2012

It looks like my previous post worked – Dennis put up a nice meaty blog post about his experiences applying the principles of my course to a tightly-coupled legacy code base.

Here’s the punchline:

“By using messaging, queues, and publish/subscribe patterns, we were able to upgrade a core part of our system without touching any other parts – even those that it communicates with on an ongoing basis. During the short period of time that it was down, the queues took care of buffering the communication for that service without affecting anything else. The system as a whole was never really down.

This was a totally new experience for our company – an upgrade without downtime, even with the thousands of websites we’re running.”

Read the full story.

By the way, if your in the Netherlands next week, you can catch Dennis speaking about these topics at the Dutch .NET User Group. You can get all the info and register here.



Course feedback from Canada

Thursday, September 6th, 2012

I just love getting emails from people who’ve attended my course and are now in a place where they’ve been able to apply what they’ve learned. Sean from Canada sent me this:

“It’s the first project I’ve been able to use the principles from your course and the resulting codebase is so simple. I was able to add reporting module without changing a line of existing code just by subscribing to events. Awesome. Keeping everything explicit is the best was to keep it simple which i find is easier developing for mobile. I’m sure there is lots I could improve. I’d like to take course again one day.”

This right here is what I use as an answer when people ask me, “don’t you get tired of giving the same course over and over again?”

Quite simply – I don’t. There’s really nothing quite like having this kind of impact on people.



High Availability a la Dennis

Monday, September 3rd, 2012

I thought I’d give a bit of a shout-out to Dennis van der Stelt whose been applying many of the principles from my course on his project and now has something of a success story to share. Although all he put out was a little tweet about it, I think if more people bug him, we can tease some more out:

It’s not just about getting the system built quickly the first time, and it’s not just about having a maintainable code base longer term, equally important is the ability to quickly deploy major releases to the system without downtime – ‘cuz when you’re system is down, it’s not providing any business value (which is what being Agile is all about).

What do you say, Dennis? Tell us some more!

UPDATE

Dennis gives the full story here.



Summer Courses and User Group Presentations

Tuesday, June 5th, 2012

summerAs I make my way to the Norwegian Developers Conference, I thought I’d post some other upcoming community events you might be interested in attending – depending on where you are.

In June, Andreas Ohlund will be teaching the Enterprise Development with NServiceBus course in London (details here) and on Wednesday June 27 he’ll be giving a user group presentation – Death to the Batch Job (details here).

In the beginning of July I’ll be in London delivering my Advanced Distributed Systems Design course (details here) and on Monday evening (July 2) will be giving a talk about Command, Queries, and Consistency (details here).

Towards mid-July I’ll be giving the same course in Israel (details here) and giving my “Who needs a service bus anyway?” talk on Wednesday July 18th to the Israel .NET Developers User Group – details here.

Hope you can make it.



ADSD Toronto 2012 Registration Open

Wednesday, May 30th, 2012

Dates: Aug 13-17
Location: Rostie Group – 11th floor, 20 Bay Street Toronto ON

Although the prices has gone up a bit to meet the rates of my training partners, I’m including the video recording of the course in the price so that you’ll have a complete reference to go back to after the course is over.

Hope to see you there.

Register here



NServiceBus Courses + ADSD in Israel

Sunday, May 20th, 2012

The next NServiceBus courses are going to be offered in London and in Austin TX.

The course is now 4 days and covers all the new wonderful features of version 3.0.

Andreas Ohlund will be giving the course in London on June 26-29 and Jimmy Bogard will be giving the course in Austin on July 17-20.

I’ll also be offering my 5-day Advanced Distributed Systems Design course in Israel on July 15-19.

Registration and details here.



Common CQRS Abuses

Sunday, February 26th, 2012

Abuse #1

“I’m using CQRS because I need to scale.”

While CQRS may be more scalable than other more traditional architectures, the use of asynchronous communication often complicates the user interaction model causing users to not see the changes they made to data in the UI until later. Trying to compensate for this (by writing even more code) digs one deeper into the complexity hole.

When I point to non-collaborative subdomains and state “You don’t need CQRS for that”, the reason is that in these areas you don’t tend to have much read/write contention. While multiple users/actors may be working in parallel, they don’t touch the same set of data (or do so only very rarely).

In these environments, all you need is a scalable data storage technology – something designed to scale-out (unlike most relational databases). This can take the form of NOSQL databases like HBase and Cassandra. Often all you need is the UI to query that directly and show the results, and the same goes for persisting the data back – possibly with some basic validation and calculation code on the side.

No commands, events, DTOs, publish/subscribe, domain model, etc.

As Ayende says – JFHCI, just f-ing hard code it.

You’d be surprised how much of your data this approach can apply to.

With the time you save on all the less important stuff, you’ll have more time to apply CQRS the right way for the high-value/high-complexity parts of your system.

***

Just a final note, as registration for my course in New York is coming to a close in 2 weeks, I wanted to let you all know that the price for the course will be going up this April, after the course in Sydney. The reason for this is that the courses I run myself (at the current rate) have been cannibalizing attendees from the partner companies I do the course with.

I’ll be providing significant discounts to independent consultants (and others paying their own way) to try to keep things fair. Hope to see you there.

Go to the registration page.



Talks, NServiceBus Beta, and Course Registration

Wednesday, January 4th, 2012

Some links to things that don’t fit anywhere else:

Andreas Ohlund’s talk on New and Shiny things in NServiceBus 3.0 is available here.

By the way, we’ve now got a beta out of NServiceBus 3.0 – get it here.

Yves Goeleven will be giving a talk on simplifying distributed application development with NServiceBus and the Windows Azure Platform on Jan 31 – details here.

Carl and Richard over at Dot Net Rocks interviewed me at the Oredev conference in Sweden about Domain Driven Design and one of my pet peeves – the use of Customer in example applications. Get it here.

I’m also happy to announce that registration for my 5-day Advanced Distributed Systems Design course has now opened for Bad Ems Germany and New York, in addition to the already open registrations for Austin TX and London. Information and registration on my training page.

I’ve also made some progress with the recording of the course – you can now access days 1, 2, and part of day 3 – covering distributed systems theory, coupling, messaging patterns, bus and broker architectural style, SOA building blocks, and the hotel management SOA exercise. Information and purchase available here.



Training – US, Europe, and now Virtual!

Thursday, November 10th, 2011

After the smashing success of my course in San Francisco, I’m happy to announce the opening of the next one in the US. This time I’m going to be giving it in Austin Texas from Jan 23 to 27 2012. Details and registration available here.

If you’re on the other side of the Atlantic, you can catch me in Stockholm on Nov 28 or in London on Dec 12.

On a related note, when I gave the course in Australia I had it recorded.

I know that there are some of you who can’t get your companies to give you time off to go to one of my courses so I hope that this virtual training thing will help. It’s quite a lot of video and, it turns out, there aren’t a lot of companies who make it easy to sell videos online. I’ve found one that looks very reasonable, but the visual design side of things still requires a fair bit of tweaking to make it look good.

Regardless, even though it looks ugly, even though not all of the videos are up yet, I wanted to make it available for all of you as quickly as possible. So here it is.

This is my first time doing something like this so please give me feedback on how to improve. Hopefully the platform that I’ve chosen will enable me to incorporate as much of your ideas as possible.



   


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Recommendations

Bryan Wheeler, Director Platform Development at msnbc.com
Udi Dahan is the real deal.

We brought him on site to give our development staff the 5-day “Advanced Distributed System Design” training. The course profoundly changed our understanding and approach to SOA and distributed systems.

Consider some of the evidence: 1. Months later, developers still make allusions to concepts learned in the course nearly every day 2. One of our developers went home and made her husband (a developer at another company) sign up for the course at a subsequent date/venue 3. Based on what we learned, we’ve made constant improvements to our architecture that have helped us to adapt to our ever changing business domain at scale and speed If you have the opportunity to receive the training, you will make a substantial paradigm shift.

If I were to do the whole thing over again, I’d start the week by playing the clip from the Matrix where Morpheus offers Neo the choice between the red and blue pills. Once you make the intellectual leap, you’ll never look at distributed systems the same way.

Beyond the training, we were able to spend some time with Udi discussing issues unique to our business domain. Because Udi is a rare combination of a big picture thinker and a low level doer, he can quickly hone in on various issues and quickly make good (if not startling) recommendations to help solve tough technical issues.” November 11, 2010

Sam Gentile Sam Gentile, Independent WCF & SOA Expert
“Udi, one of the great minds in this area.
A man I respect immensely.”





Ian Robinson Ian Robinson, Principal Consultant at ThoughtWorks
"Your blog and articles have been enormously useful in shaping, testing and refining my own approach to delivering on SOA initiatives over the last few years. Over and against a certain 3-layer-application-architecture-blown-out-to- distributed-proportions school of SOA, your writing, steers a far more valuable course."

Shy Cohen Shy Cohen, Senior Program Manager at Microsoft
“Udi is a world renowned software architect and speaker. I met Udi at a conference that we were both speaking at, and immediately recognized his keen insight and razor-sharp intellect. Our shared passion for SOA and the advancement of its practice launched a discussion that lasted into the small hours of the night.
It was evident through that discussion that Udi is one of the most knowledgeable people in the SOA space. It was also clear why – Udi does not settle for mediocrity, and seeks to fully understand (or define) the logic and principles behind things.
Humble yet uncompromising, Udi is a pleasure to interact with.”

Glenn Block Glenn Block, Senior Program Manager - WCF at Microsoft
“I have known Udi for many years having attended his workshops and having several personal interactions including working with him when we were building our Composite Application Guidance in patterns & practices. What impresses me about Udi is his deep insight into how to address business problems through sound architecture. Backed by many years of building mission critical real world distributed systems it is no wonder that Udi is the best at what he does. When customers have deep issues with their system design, I point them Udi's way.”

Karl Wannenmacher Karl Wannenmacher, Senior Lead Expert at Frequentis AG
“I have been following Udi’s blog and podcasts since 2007. I’m convinced that he is one of the most knowledgeable and experienced people in the field of SOA, EDA and large scale systems.
Udi helped Frequentis to design a major subsystem of a large mission critical system with a nationwide deployment based on NServiceBus. It was impressive to see how he took the initial architecture and turned it upside down leading to a very flexible and scalable yet simple system without knowing the details of the business domain. I highly recommend consulting with Udi when it comes to large scale mission critical systems in any domain.”

Simon Segal Simon Segal, Independent Consultant
“Udi is one of the outstanding software development minds in the world today, his vast insights into Service Oriented Architectures and Smart Clients in particular are indeed a rare commodity. Udi is also an exceptional teacher and can help lead teams to fall into the pit of success. I would recommend Udi to anyone considering some Architecural guidance and support in their next project.”

Ohad Israeli Ohad Israeli, Chief Architect at Hewlett-Packard, Indigo Division
“When you need a man to do the job Udi is your man! No matter if you are facing near deadline deadlock or at the early stages of your development, if you have a problem Udi is the one who will probably be able to solve it, with his large experience at the industry and his widely horizons of thinking , he is always full of just in place great architectural ideas.
I am honored to have Udi as a colleague and a friend (plus having his cell phone on my speed dial).”

Ward Bell Ward Bell, VP Product Development at IdeaBlade
“Everyone will tell you how smart and knowledgable Udi is ... and they are oh-so-right. Let me add that Udi is a smart LISTENER. He's always calibrating what he has to offer with your needs and your experience ... looking for the fit. He has strongly held views ... and the ability to temper them with the nuances of the situation.
I trust Udi to tell me what I need to hear, even if I don't want to hear it, ... in a way that I can hear it. That's a rare skill to go along with his command and intelligence.”

Eli Brin, Program Manager at RISCO Group
“We hired Udi as a SOA specialist for a large scale project. The development is outsourced to India. SOA is a buzzword used almost for anything today. We wanted to understand what SOA really is, and what is the meaning and practice to develop a SOA based system.
We identified Udi as the one that can put some sense and order in our minds. We started with a private customized SOA training for the entire team in Israel. After that I had several focused sessions regarding our architecture and design.
I will summarize it simply (as he is the software simplist): We are very happy to have Udi in our project. It has a great benefit. We feel good and assured with the knowledge and practice he brings. He doesn’t talk over our heads. We assimilated nServicebus as the ESB of the project. I highly recommend you to bring Udi into your project.”

Catherine Hole Catherine Hole, Senior Project Manager at the Norwegian Health Network
“My colleagues and I have spent five interesting days with Udi - diving into the many aspects of SOA. Udi has shown impressive abilities of understanding organizational challenges, and has brought the business perspective into our way of looking at services. He has an excellent understanding of the many layers from business at the top to the technical infrstructure at the bottom. He is a great listener, and manages to simplify challenges in a way that is understandable both for developers and CEOs, and all the specialists in between.”

Yoel Arnon Yoel Arnon, MSMQ Expert
“Udi has a unique, in depth understanding of service oriented architecture and how it should be used in the real world, combined with excellent presentation skills. I think Udi should be a premier choice for a consultant or architect of distributed systems.”

Vadim Mesonzhnik, Development Project Lead at Polycom
“When we were faced with a task of creating a high performance server for a video-tele conferencing domain we decided to opt for a stateless cluster with SQL server approach. In order to confirm our decision we invited Udi.

After carefully listening for 2 hours he said: "With your kind of high availability and performance requirements you don’t want to go with stateless architecture."

One simple sentence saved us from implementing a wrong product and finding that out after years of development. No matter whether our former decisions were confirmed or altered, it gave us great confidence to move forward relying on the experience, industry best-practices and time-proven techniques that Udi shared with us.
It was a distinct pleasure and a unique opportunity to learn from someone who is among the best at what he does.”

Jack Van Hoof Jack Van Hoof, Enterprise Integration Architect at Dutch Railways
“Udi is a respected visionary on SOA and EDA, whose opinion I most of the time (if not always) highly agree with. The nice thing about Udi is that he is able to explain architectural concepts in terms of practical code-level examples.”

Neil Robbins Neil Robbins, Applications Architect at Brit Insurance
“Having followed Udi's blog and other writings for a number of years I attended Udi's two day course on 'Loosely Coupled Messaging with NServiceBus' at SkillsMatter, London.

I would strongly recommend this course to anyone with an interest in how to develop IT systems which provide immediate and future fitness for purpose. An influential and innovative thought leader and practitioner in his field, Udi demonstrates and shares a phenomenally in depth knowledge that proves his position as one of the premier experts in his field globally.

The course has enhanced my knowledge and skills in ways that I am able to immediately apply to provide benefits to my employer. Additionally though I will be able to build upon what I learned in my 2 days with Udi and have no doubt that it will only enhance my future career.

I cannot recommend Udi, and his courses, highly enough.”

Nick Malik Nick Malik, Enterprise Architect at Microsoft Corporation
You are an excellent speaker and trainer, Udi, and I've had the fortunate experience of having attended one of your presentations. I believe that you are a knowledgable and intelligent man.”

Sean Farmar Sean Farmar, Chief Technical Architect at Candidate Manager Ltd
“Udi has provided us with guidance in system architecture and supports our implementation of NServiceBus in our core business application.

He accompanied us in all stages of our development cycle and helped us put vision into real life distributed scalable software. He brought fresh thinking, great in depth of understanding software, and ongoing support that proved as valuable and cost effective.

Udi has the unique ability to analyze the business problem and come up with a simple and elegant solution for the code and the business alike.
With Udi's attention to details, and knowledge we avoided pit falls that would cost us dearly.”

Børge Hansen Børge Hansen, Architect Advisor at Microsoft
“Udi delivered a 5 hour long workshop on SOA for aspiring architects in Norway. While keeping everyone awake and excited Udi gave us some great insights and really delivered on making complex software challenges simple. Truly the software simplist.”

Motty Cohen, SW Manager at KorenTec Technologies
“I know Udi very well from our mutual work at KorenTec. During the analysis and design of a complex, distributed C4I system - where the basic concepts of NServiceBus start to emerge - I gained a lot of "Udi's hours" so I can surely say that he is a professional, skilled architect with fresh ideas and unique perspective for solving complex architecture challenges. His ideas, concepts and parts of the artifacts are the basis of several state-of-the-art C4I systems that I was involved in their architecture design.”

Aaron Jensen Aaron Jensen, VP of Engineering at Eleutian Technology
Awesome. Just awesome.

We’d been meaning to delve into messaging at Eleutian after multiple discussions with and blog posts from Greg Young and Udi Dahan in the past. We weren’t entirely sure where to start, how to start, what tools to use, how to use them, etc. Being able to sit in a room with Udi for an entire week while he described exactly how, why and what he does to tackle a massive enterprise system was invaluable to say the least.

We now have a much better direction and, more importantly, have the confidence we need to start introducing these powerful concepts into production at Eleutian.”

Gad Rosenthal Gad Rosenthal, Department Manager at Retalix
“A thinking person. Brought fresh and valuable ideas that helped us in architecting our product. When recommending a solution he supports it with evidence and detail so you can successfully act based on it. Udi's support "comes on all levels" - As the solution architect through to the detailed class design. Trustworthy!”

Chris Bilson Chris Bilson, Developer at Russell Investment Group
“I had the pleasure of attending a workshop Udi led at the Seattle ALT.NET conference in February 2009. I have been reading Udi's articles and listening to his podcasts for a long time and have always looked to him as a source of advice on software architecture.
When I actually met him and talked to him I was even more impressed. Not only is Udi an extremely likable person, he's got that rare gift of being able to explain complex concepts and ideas in a way that is easy to understand.
All the attendees of the workshop greatly appreciate the time he spent with us and the amazing insights into service oriented architecture he shared with us.”

Alexey Shestialtynov Alexey Shestialtynov, Senior .Net Developer at Candidate Manager
“I met Udi at Candidate Manager where he was brought in part-time as a consultant to help the company make its flagship product more scalable. For me, even after 30 years in software development, working with Udi was a great learning experience. I simply love his fresh ideas and architecture insights.
As we all know it is not enough to be armed with best tools and technologies to be successful in software - there is still human factor involved. When, as it happens, the project got in trouble, management asked Udi to step into a leadership role and bring it back on track. This he did in the span of a month. I can only wish that things had been done this way from the very beginning.
I look forward to working with Udi again in the future.”

Christopher Bennage Christopher Bennage, President at Blue Spire Consulting, Inc.
“My company was hired to be the primary development team for a large scale and highly distributed application. Since these are not necessarily everyday requirements, we wanted to bring in some additional expertise. We chose Udi because of his blogging, podcasting, and speaking. We asked him to to review our architectural strategy as well as the overall viability of project.
I was very impressed, as Udi demonstrated a broad understanding of the sorts of problems we would face. His advice was honest and unbiased and very pragmatic. Whenever I questioned him on particular points, he was able to backup his opinion with real life examples. I was also impressed with his clarity and precision. He was very careful to untangle the meaning of words that might be overloaded or otherwise confusing. While Udi's hourly rate may not be the cheapest, the ROI is undoubtedly a deal. I would highly recommend consulting with Udi.”

Robert Lewkovich, Product / Development Manager at Eggs Overnight
“Udi's advice and consulting were a huge time saver for the project I'm responsible for. The $ spent were well worth it and provided me with a more complete understanding of nServiceBus and most importantly in helping make the correct architectural decisions earlier thereby reducing later, and more expensive, rework.”

Ray Houston Ray Houston, Director of Development at TOPAZ Technologies
“Udi's SOA class made me smart - it was awesome.

The class was very well put together. The materials were clear and concise and Udi did a fantastic job presenting it. It was a good mixture of lecture, coding, and question and answer. I fully expected that I would be taking notes like crazy, but it was so well laid out that the only thing I wrote down the entire course was what I wanted for lunch. Udi provided us with all the lecture materials and everyone has access to all of the samples which are in the nServiceBus trunk.

Now I know why Udi is the "Software Simplist." I was amazed to find that all the code and solutions were indeed very simple. The patterns that Udi presented keep things simple by isolating complexity so that it doesn't creep into your day to day code. The domain code looks the same if it's running in a single process or if it's running in 100 processes.”

Ian Cooper Ian Cooper, Team Lead at Beazley
“Udi is one of the leaders in the .Net development community, one of the truly smart guys who do not just get best architectural practice well enough to educate others but drives innovation. Udi consistently challenges my thinking in ways that make me better at what I do.”

Liron Levy, Team Leader at Rafael
“I've met Udi when I worked as a team leader in Rafael. One of the most senior managers there knew Udi because he was doing superb architecture job in another Rafael project and he recommended bringing him on board to help the project I was leading.
Udi brought with him fresh solutions and invaluable deep architecture insights. He is an authority on SOA (service oriented architecture) and this was a tremendous help in our project.
On the personal level - Udi is a great communicator and can persuade even the most difficult audiences (I was part of such an audience myself..) by bringing sound explanations that draw on his extensive knowledge in the software business. Working with Udi was a great learning experience for me, and I'll be happy to work with him again in the future.”

Adam Dymitruk Adam Dymitruk, Director of IT at Apara Systems
“I met Udi for the first time at DevTeach in Montreal back in early 2007. While Udi is usually involved in SOA subjects, his knowledge spans all of a software development company's concerns. I would not hesitate to recommend Udi for any company that needs excellent leadership, mentoring, problem solving, application of patterns, implementation of methodologies and straight out solution development.
There are very few people in the world that are as dedicated to their craft as Udi is to his. At ALT.NET Seattle, Udi explained many core ideas about SOA. The team that I brought with me found his workshop and other talks the highlight of the event and provided the most value to us and our organization. I am thrilled to have the opportunity to recommend him.”

Eytan Michaeli Eytan Michaeli, CTO Korentec
“Udi was responsible for a major project in the company, and as a chief architect designed a complex multi server C4I system with many innovations and excellent performance.”


Carl Kenne Carl Kenne, .Net Consultant at Dotway AB
“Udi's session "DDD in Enterprise apps" was truly an eye opener. Udi has a great ability to explain complex enterprise designs in a very comprehensive and inspiring way. I've seen several sessions on both DDD and SOA in the past, but Udi puts it in a completly new perspective and makes us understand what it's all really about. If you ever have a chance to see any of Udi's sessions in the future, take it!”

Avi Nehama, R&D Project Manager at Retalix
“Not only that Udi is a briliant software architecture consultant, he also has remarkable abilities to present complex ideas in a simple and concise manner, and...
always with a smile. Udi is indeed a top-league professional!”

Ben Scheirman Ben Scheirman, Lead Developer at CenterPoint Energy
“Udi is one of those rare people who not only deeply understands SOA and domain driven design, but also eloquently conveys that in an easy to grasp way. He is patient, polite, and easy to talk to. I'm extremely glad I came to his workshop on SOA.”

Scott C. Reynolds Scott C. Reynolds, Director of Software Engineering at CBLPath
“Udi is consistently advancing the state of thought in software architecture, service orientation, and domain modeling.
His mastery of the technologies and techniques is second to none, but he pairs that with a singular ability to listen and communicate effectively with all parties, technical and non, to help people arrive at context-appropriate solutions. Every time I have worked with Udi, or attended a talk of his, or just had a conversation with him I have come away from it enriched with new understanding about the ideas discussed.”

Evgeny-Hen Osipow, Head of R&D at PCLine
“Udi has helped PCLine on projects by implementing architectural blueprints demonstrating the value of simple design and code.”

Rhys Campbell Rhys Campbell, Owner at Artemis West
“For many years I have been following the works of Udi. His explanation of often complex design and architectural concepts are so cleanly broken down that even the most junior of architects can begin to understand these concepts. These concepts however tend to typify the "real world" problems we face daily so even the most experienced software expert will find himself in an "Aha!" moment when following Udi teachings.
It was a pleasure to finally meet Udi in Seattle Alt.Net OpenSpaces 2008, where I was pleasantly surprised at how down-to-earth and approachable he was. His depth and breadth of software knowledge also became apparent when discussion with his peers quickly dove deep in to the problems we current face. If given the opportunity to work with or recommend Udi I would quickly take that chance. When I think .Net Architecture, I think Udi.”

Sverre Hundeide Sverre Hundeide, Senior Consultant at Objectware
“Udi had been hired to present the third LEAP master class in Oslo. He is an well known international expert on enterprise software architecture and design, and is the author of the open source messaging framework nServiceBus. The entire class was based on discussion and interaction with the audience, and the only Power Point slide used was the one showing the agenda.
He started out with sketching a naive traditional n-tier application (big ball of mud), and based on suggestions from the audience we explored different solutions which might improve the solution. Whatever suggestions we threw at him, he always had a thoroughly considered answer describing pros and cons with the suggested solution. He obviously has a lot of experience with real world enterprise SOA applications.”

Raphaël Wouters Raphaël Wouters, Owner/Managing Partner at Medinternals
“I attended Udi's excellent course 'Advanced Distributed System Design with SOA and DDD' at Skillsmatter. Few people can truly claim such a high skill and expertise level, present it using a pragmatic, concrete no-nonsense approach and still stay reachable.”

Nimrod Peleg Nimrod Peleg, Lab Engineer at Technion IIT
“One of the best programmers and software engineer I've ever met, creative, knows how to design and implemet, very collaborative and finally - the applications he designed implemeted work for many years without any problems!

Jose Manuel Beas
“When I attended Udi's SOA Workshop, then it suddenly changed my view of what Service Oriented Architectures were all about. Udi explained complex concepts very clearly and created a very productive discussion environment where all the attendees could learn a lot. I strongly recommend hiring Udi.”

Daniel Jin Daniel Jin, Senior Lead Developer at PJM Interconnection
“Udi is one of the top SOA guru in the .NET space. He is always eager to help others by sharing his knowledge and experiences. His blog articles often offer deep insights and is a invaluable resource. I highly recommend him.”

Pasi Taive Pasi Taive, Chief Architect at Tieto
“I attended both of Udi's "UI Composition Key to SOA Success" and "DDD in Enterprise Apps" sessions and they were exceptionally good. I will definitely participate in his sessions again. Udi is a great presenter and has the ability to explain complex issues in a manner that everyone understands.”

Eran Sagi, Software Architect at HP
“So far, I heard about Service Oriented architecture all over. Everyone mentions it – the big buzz word. But, when I actually asked someone for what does it really mean, no one managed to give me a complete satisfied answer. Finally in his excellent course “Advanced Distributed Systems”, I got the answers I was looking for. Udi went over the different motivations (principles) of Services Oriented, explained them well one by one, and showed how each one could be technically addressed using NService bus. In his course, Udi also explain the way of thinking when coming to design a Service Oriented system. What are the questions you need to ask yourself in order to shape your system, place the logic in the right places for best Service Oriented system.

I would recommend this course for any architect or developer who deals with distributed system, but not only. In my work we do not have a real distributed system, but one PC which host both the UI application and the different services inside, all communicating via WCF. I found that many of the architecture principles and motivations of SOA apply for our system as well. Enough that you have SW partitioned into components and most of the principles becomes relevant to you as well. Bottom line – an excellent course recommended to any SW Architect, or any developer dealing with distributed system.”

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