Mateusz Urban
Haskell Engineer at Well
Gdansk Metropolitan Area Poland
Summary
👤
Senior🎓
Top SchoolMateusz Urban is a Haskell engineer with 11 years of commercial experience specializing in distributed systems, functional programming and event-sourced microservices. He leverages strong type systems and DDD to design APIs that make invalid states hard or impossible to express, improving correctness and reliability in mission-critical domains like banking. His background spans end-to-end ownership—from Kubernetes and DevOps (Terraform, Docker) to CI/CD and cloud deployments—plus leadership experience guiding small teams and onboarding engineers to F# and functional practices. Notable contributions include performance-focused refactors to a well-regarded reactive collections library (DynamicData) and migrating identity infrastructure at enterprise scale. Based in the Gdansk area, he blends technical rigor with a business-first mindset, asking the hard questions that turn domain knowledge into better product decisions. Mateusz’s pragmatic focus on maintainability and observable systems makes him effective at delivering resilient, high-confidence services.
11 years of coding experience
9 years of employment as a software developer
Bachelor of Engineering Computer Science, Bachelor of Engineering Computer Science at Polish-Japanese Academy of Information Technology
Polish, English
Github Skills (13)
algorithm10
net10
data-structures10
asp-net10
reactive-extensions10
algorithms10
dotnet10
reactive-programming10
csharp10
reactivex10
performance-optimization10
data-structure10
dotnet-core10
Programming languages (9)
Github contributions (5)
reactivemarbles/DynamicData
Jun 2018 - Jun 2018
Reactive collections based on Rx.Net
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 1 PR, 5 comments in 29 days
Contributions summary:Mateusz's contributions focused on optimizing and refactoring the `dynamicdata` library's internal data structures and algorithms. They implemented changes to improve performance by avoiding unnecessary operations like `ToList()` calls and by switching to `LinkedLists` for the `IndexCalculator`. The user also addressed compilation errors and handled refresh operations within the `IndexCalculator`, improving the library's stability and efficiency. Furthermore, the user marked `SortOptimisations` as obsolete, indicating a focus on maintaining code quality and potentially streamlining future development.
reactive-collectionsdotnetdynamic-datarx-observablemvvm
onliner10/k8s-mongo-db-provider
Sep 2019 - Oct 2019
Automatically provisions mongodb databases and credentials in Kubernetes
Contributions:23 commits, 2 PRs, 17 pushes in 12 days
databasesk8skubernetesdatabasecredentials
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