Throughout his career in software, aided by heroic colleagues he has navigated the minefield of failure and occasionally stumbled on a tale of success. Weeding out the sources of failure and cultivating those that breed success, he hopes to tell his tales; sell his wares, and make the world a better place. This talk will provide practical steps on how to simply do this. Prior to this, Alex worked at a large oil and gas services company where he leveraged the Elastic Stack to build a search engine, which supported search on geospatial, time series and full text data for the downhole drilling domain.
A microservice architecture was essential in this use case to meet the demands of scale required. The Logging and monitoring of these ecosystems was crucial to allow quick response to any issues. When you talk about creating an application from scratch, you often cannot imagine the evolution of its ecosystem without building more and more services, one by one.
Nikita is a frequent speaker at various technical conferences on Microsoft. NET both inside and outside DataArt, where he co-leads the Atlas project — an open source accelerator framework designed to improve the business agility of cloud-based. NET applications. In this talk, Liz will discuss why your security team might have concerns about a microservices-based architecture, and then you'll see how, by adopting DevSecOps and automated processes, and some of the tools and capabilities of a cloud native architecture, you can strengthen your security defences.
There will be demos! Liz Rice is the Technology Evangelist with container security specialists Aqua Security , and also works on open source projects including manifesto and kube-bench. Prior to that she co-founded Microscaling Systems and was one of the developers of image inspection tool MicroBadger.
When not writing code, or talking about it, Liz loves riding bikes in places with better weather than her native London. Domain modeling in particular is very specific with guidance on designing and coordinating the dance between the myriad moving parts in our system.
To encourage and enable more developers to get on the path of DDD, is it reasonable to allow a more pragmatic approach over a principled approach of adhering strictly to DDD guidelines? Should developers be encouraged to start with low hanging fruit which they can quickly benefit from in their software projects while they continue to learn, to gain a deeper understanding of Domain-Driven Design in order to evolve and adapt their practices as they move closer and closer to the beauty we all know that can be achieved with DDD.
You can find Julie presenting on Entity Framework, Domain Driven Design and other topics at user groups and conferences around the world. Julie blogs at thedatafarm. Join Tugberk in this session where he will walk you though an evolvable software architecture based on Domain-driven Design and CQRS, which can let you optimise for today's problems at the same time allowing you to design towards event sourcing.
You will also start understanding the concepts of Hexagonal Architecture pattern, which puts the Domain at the heart of the system and pushes the input and output at the edges. This talk will give you some techniques to let you be tactical about your architectural approach, which will be especially handy when conflicts arises between business needs and refactoring costs. Follow Tugberk on twitter tourismgeek, head over to his blog and check out his projects on GitHub.
The short answer to that could be to build your core domain - that differentiates you from your competitors - in-house and outsource undifferentiating commodities to utility suppliers. In this talk Susanne will use Wardley Maps to visualise how the value chain can evolve when getting infrastructure components handled by different options: Going from open source software to Kubernetes' container orchestration, to Istio's service mesh and to Serverless technologies, such as AWS Lambda.
Susanne is an independent tech consultant from Hamburg, Germany, supporting organizations to build and run software products from idea to production with a focus on socio-technical systems. She likes connecting the dots between Wardley Mapping, Domain-Driven Design, and Team Topologies as a holistic approach to design and build adaptive systems for a fast flow of change.
Susanne was previously working as a startup CTO. She has a background in computer sciences and experience in software development and software architecture for more than 18 years. Susanne presents regularly at international tech conferences as a speaker.
A traditional approach is to reproduce the domain as accurate in every detail as possible — building the company-wide canonical domain model. But is this the actual goal of models? If you look close enough, you will see that a model is the exact oposite—a model is actually an abstraction of the reality in which only the essential parts are transferred. The inessential is left out of the model. What parts of the reality are essential or inessential is defined by the context.
A simple model is easier to understand than a complicated one. Therefore, it is a good idea to break a complex reality i. Exactly this effect is what the strategic design of DDD takes advantage of. Here instead of one complex company-wide model we build several small models that are easy to understand.
In this talk Henning will look into bounded context and the other tools that are available to to divide the domain into clearly separated models. Henning is interested in the evolution of programming languages, long-living software architectures and big refactorings. Recently he translated »Domain-Driven Design distilled« into german. Henning is married and has children. Maria Gomez explores the most important operational concerns for maintaining microservices and explains why observability helps you in maintaining a healthy production environment.
Over her 10 years of industry experience, Maria has worked with many different technologies and domains, which has helped her lead teams and advise stakeholders in making the right technology decisions. She is also a speaker and an advocate for diversity and inclusion in the IT industry. Metamodels provide a solution to the horizontal layering problem. In the same way that an ORM such as Hibernate uses a metamodel to separate the domain model from its persistence model, so too can a metamodel be used to - among other things - separate out the application and presentation layers.
Splitting vertical subdomains is a different challenge again, but DCI - an evolution of the well-known MVC pattern - is an architectural style that helps achieve that goal. Distinguishing between data what the system is , interaction what the system does , and context what the user is trying to do , it sits somewhere between aspect-oriented and object-oriented approaches.
Its the aspect-oriented nature that allows functionality to be partitioned into vertical submodules but nevertheless be presented in a coherent fashion to the end-user. So much for the theory. In this live coding session we'll look at a framework that marries both of these techniques, resulting in applications with clean separation both vertically and horizontally. Dan has also been instrumental in the success of the first large-scale naked objects system which administers state benefits for the Irish Government, a system used by over 7, users and paying out over EUR5bn a year in benefits.
He currently leads a team delivering a variety of DevOps, GitOps and "docs-as-code" tools to the wider development community at the Department. That was the case a few years ago at Fiverr, the world's largest marketplace for digital services. After adopting a Microservices architecture, development was a breeze compared to the mighty monolith If you feel you are approaching the end of your Microservices honeymoon period, then this talk is for you!
Erik will explain what DDD's Strategic Patterns are and how adopting them helped them to better align their tech with the business, facilitate team autonomy and ownership and most importantly deliver high quality products faster! The approach of micro frontends is an effective strategy to tackle this problem and first appeared at the end of on the ThoughtWorks Technology Radar. By going into detail about the idea of extending the concepts of microservices to the frontend world, the importance of end-to-end verticals, the difference of an orchestration- or choreography-based implementation, and the trade-offs in reusability become reasonable.
Rather, they are suited for a specific set of problems. Automating examples brings huge benefits, but standardised BDD practices can feel artificial. We'll see a typical Gherkin-oriented methodology and how it works, then explore some more natural visual formats for examples, and how they can practically be used to drive tests.
There are no prerequisites, all the work will be done via a browser on a remote machine. As a Full Stack Developer and has had experience in developing software in aerospace and finance. Salman focuses on building high quality web platforms and improving the software development life cycle. Recently he has started looking at how machine learning can help in improving the software development process.
He also focuses his time on using container technology and how Kubernetes can be used to manage containers. He co-founded Cloud Native Wales , an initiative to bring together a community that would share ideas on how to use cloud native technologies effectively.
Additionally, he is part of learnk8s. Follow Salman on his personal Twitter soulmaniqbal and also cloudnativewal. Thomas and Bruno will propose you join them to experience a workshop where you will practice Event Storming reinforced by Example Mapping. His company 42skillz which aims to help organisations to make software and to work differently, he provides training, coaching, consulting about TDD, BDD, legacy code refactoring techniques and DDD with an extra soul.
Through a sample Java code base, group interactions and fun, you will have a first grasp on Living Documentation, at a fast pace! Get a grasp on the Living Documentation principles and the main traps to avoid, and learn concrete solutions to implement Living Documentation in code.
Systems architecture is the art and science of conceptual decision making. What is the best possible solution under the circumstances?
The circumstances are always uncertain. Yet, people must make interdependent and interrelated decisions if the goal is conceptual integrity. Isn't that how many projects approach product development? Products that might seem, conceptually, independent are, more and more often, a coordinated part of an emergent system. The success of those systems depends on building bridges between business and technical, strategy and implementation, product engineering teams and other product engineering teams.
To do this, you stretch your thinking beyond specific technology solutions, into the world in which the problems exist. And you become very, very good at making a strong collaborative case for how to solve those problems. She is co-founder of Mentrix, a consultancy providing enterprise systems architecture, technology strategy, team leadership and systems development.
The talk will use a mix of examples from Government to the Private sector, from infrastructure to serverless and try to answer the question of whether there is a right choice or is every journey different?
He is a passionate advocate and researcher in the fields of open source, commoditization, innovation, organizational structure and cybernetics. By separating behaviour and state, lean models offer an effective and scalable way to represent units of behaviour. With the advances in cloud-based infrastructures and implementation of microservices architectures, functional models seem to be a compatible, resilience enabling and more obvious choice as the preferred paradigm.
This talk explores how network science techniques can be applied to help gain insight into, and explore questions about your microservices architecture. Bringing data together after painstakingly designing separation is counter-intuitive. Would you even have any of the benefits of a micro-service architecture anymore if you have one big fat database with all your data in it? Chris will explain how, at Landbay, we maintain totally different data stores and built an awesome downstream data-warehouse reporting solution with a robust data pipeline.
For example, many run the risk of falling into the trap of modelling services around domain entities, risking ending up with a distributed monolith with its devastating coupling, fragility, and cognitive nightmare. Luckily, there are shoulders to stand on to get out of the quagmire, or even better, prevent getting on to that slippery slope in the first place. Being conscious of fallacies like those of distributed computing and anti-patterns like functional decomposition and entity services are all well and good, and necessary heuristics to good service design, but one often crave more concrete guidance.
There are many great techniques to consider, like context mapping, user story mapping, event storming, and value chain analysis, but in this talk Trond will focus on the lost art of business capability modelling. The thesis is that a technique that was relevant in the pre-computing era might be just as useful and relevant when splitting monoliths into a mesh of autonomous micro services. Maybe they could even help dentify subdomains, contexts, and organisational structures; in effect constructing a sociotechnical system?
The rise of Backend-For-Frontend is real and so is the emerge of micro frontends. We all talk about composition, yet so many projects fail to implement actual composition. The result seem to be some kind of compromise proving hard to scale when multiple teams are involved - causing lock-step deployment, latency, bottlenecks and coordination issues. What if you could find a viable solution that allowed you to scale development, keep distribution and cohesion and also provide composition of user interfaces?
This talk explores the different patterns available, and attempts to pinpoint their pros and cons, effectively serving as guidance to implementing proper composition.
Follow Thomas on Twitter presthus Blog. Developers are moving from being purely third line support, to working more collaboratively with engineers and operational staff.
Also as you move to cloud native microservice solutions, the increased complexity and diversity of our production landscape means operational staff may well rely more heavily on the engineers, in particular out of hours. Nicky has spent the last 18 years working across a plethora of industries utilising a myriad of technology and approaches. From working on everything from trading applications to content enrichment APIs, she has seen a lot of approaches and processes try to help minimise operational support for developers.
In this talk, Nicky will be exploring and discussing some of her top approaches and techniques to help reduce the risk of that dreaded 3am call! You will gain some practical insight into how to handle failure in today's more complex distributed microservice systems.
This will include looking at approaches to resiliency, understanding your system, understanding the requirements for fault tolerance, and the developers' mindset necessary for this. She will be peppering this talk with real world examples, and an occasional war story along the way too. Healthcare is no longer local; laboratory tests cross borders and radiology reading is outsourced offshore.
While overwhelmingly complex, healthcare is also one of the most rewarding industries to work in, making direct impact to the lives of patients. Understanding typical challenges of the healthcare industry Using techniques of Domain Driven Design to shape solutions Managing cross-cutting concerns, such as patient safety, data security and regulatory compliance Supporting ancillary business functions, such as audits.
Sonya is an engineering leader and solution architect with many years of experience. Healthcare engagements were most rewarding in her career and frequently appear in her portfolio. She started focusing her career path on software engineering and architecture in healthcare, and championing Domain-Driven Design. She now leads enterprise software development at Guardant Health. During the last 8 years, at Internovus, you've found so many creative ways to do the latter: The different ways events can introduce coupling so strong, it will make the classic enterprise monolith envy Multiple ways of using events to introduce accidental complexity How to use events to turn a microservice into an architectural trojan horse; Why some events, just like underwear, better be kept private.
Those sights are not for the faint of heart, but fear not. You will get heuristics that will help you identify those situations, eliminate event-driven accidental complexities, and make events great again. Matthias has his own web development, training and consultancy company called Noback's Office. He has a strong focus on backend development and architecture, always looking for better ways to design software. Since he's been blogging about all sorts of programming-related topics on matthiasnoback.
This talk will look at what guarantees Kubernetes gives you out-of-the-box, and what you can do to establish a trustworthy and reliable workflow for deploying and updating images. Topics and tooling covered will include:. But just because you cut your big scary monolith into itty bitty bite-sized chunks doesn't mean you're actually cashing in on all that microservices have to offer. In particular, this talk focuses on one fundamental question: Are your microservices independent?
Microservices should be modelled as isolated units, but in reality, robust systems rely on cooperation between those different units. This seems like a Catch, but there is hope! Heather will explore ways to minimise the dreaded deployment dependencies and cascading failures through a loosely-coupled client server relationship, well-defined interfaces, and automated contract testing in your build pipelines.
She will also share how Landbay has cleaned up their own generated code dependencies, bolstering the resiliency and independence of their system without losing the speed and ease of normalised interfaces. He specializes in helping organizations to innovate and achieve faster turnaround for new product development while leveraging or replacing legacy assets. He has worn many hats over time, as developer, architect, development manager, entrepreneur and agile practitioner, in companies from startups to large multinationals.
However, in his actual day-to-day work he usually winds up as what could be best described as a kind of project janitor. However, many of you design software for users whose native language is not English. In such cases when going through the knowledge-crunching process with the domain experts there are no English terms mentioned and both the model and the Ubiquitous Language are expressed in the native language. Then you try to implement the model and suddenly there is a dilemma whether or not to continue using non-English domain terms in code or do we try to translate them?
How do you bridge the two worlds? Ignoring the issue may lead to discrepancy of Ubiquitous Language applied in code vs. This talk will present the challenges the teams have encountered while developing patient record systems for Norwegian hospitals, trying to code in English and communicating with users and domain experts in Norwegian. Takeaways are the lessons learned and suggested approaches on improving the model while lowering the language barrier.
He is a developer with 17 years of experience in the telecom and healthcare sector, and he's deeply involved in developing enterprise-solutions for complex domains. He's actively been involved in introducing DDD to the organization both on strategic and tactic level. News News. Reports Reports. New issues New issues. Raise finance. Start your journey here Raise finance. Equity Equity. Debt Debt. Funds Funds. Focus Focus. Nominated Advisers Issuer Services Prices and markets search.
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Most of them are usually not aware about their condition until they are examined for some other related health condition. The intervertebral disc is composed of an inflexible ring called the annulus fibrosis which encloses a gelatinous inner structure called the nucleus pulposus. The discs are kept in position with the help of endplates between two vertebral bodies.
The intervertebral discs act as shock absorbers. As we age, the rate at which the old, worn out cells are replaced is gradually reduced, resulting in the degenerative changes in the discs which can also be accelerated by injury or trauma.
These structural changes can cause a sequence of other changes, resulting in nerve compression and pain due to reduction in the disc height, and presence of bone spurs or bony overgrowths osteophytes. Other conditions such as spinal stenosis and osteoarthritis spondylosis can also affect the intervertebral joints and spinal stability.
Every patient is different, and it is important to realise that not everyone develops symptoms because of degenerative disc disease. When the condition becomes painful or symptomatic, it can cause several different symptoms due to the compression of the nerve roots. Depending on the location of the degenerative disc, it could cause back pain, radiating leg pain, neck pain, and radiating arm pain.
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