Filip Franik / Services
Senior engineering, without the hand-offs.
I can own a feature across the stack, untangle a difficult system, or help your team work better. You speak directly to the person doing the work.
- Build
Full-stack feature delivery
Angular web products, React Native mobile apps, ASP.NET Core services, APIs, authentication and data models, owned from the first requirement to production.
- Improve
Data, SQL & performance
Deadlocks, timeouts, index fragmentation, slow execution plans and caching problems, diagnosed with evidence and fixed in multi-terabyte SQL Server databases and distributed .NET services.
- Assure
Automated testing & delivery
Unit, integration and end-to-end tests that people trust: xUnit, WebApplicationFactory, Testcontainers, Vitest and Playwright, running in GitHub Actions. Experience migrating suites from Jasmine and Cypress.
- Accelerate
AI-assisted development
Daily work with Claude Code, Codex and GitHub Copilot, using a layered review process so AI-generated changes meet the same bar as hand-written ones. I also research new uses of AI in company workflows, from browser-driven QA to user documentation written by AI exploring the interface.
- Grow
Code review & mentoring
Thorough pull-request reviews, show-and-tells that spread new techniques, and mentoring grounded in years of training interns and interviewing candidates.
[ 02 ] Core toolkit
- Front end
- Angular 22
- TypeScript
- RxJS
- NgRx
- Signals
- React Native
- ngx-charts
- Back end
- C#
- ASP.NET Core
- EF Core
- REST APIs
- Data
- SQL Server
- T-SQL
- PostgreSQL
- Testing
- xUnit
- Testcontainers
- Vitest
- Playwright
- Delivery
- GitHub Actions
- Docker
- Kubernetes
- .NET Aspire
- AI tools
- Claude Code
- Codex
- GitHub Copilot
Contact
Tell me where the work is stuck.
I will help you work out whether you need delivery, a focused review, team training, or a different approach.