Senior full-stack engineer

Software that holds up under pressure.

I'm Filip Franik, a senior full-stack engineer working with Angular, .NET and SQL. I take features from the database to the user interface, test them properly, and stay with them in production.

Start a conversation ↗See my experience
Angular · .NET · SQLRemote-first since 2022Based in Kraków
const engineer = {
  experience: '20 years',
  stack: ['Angular', '.NET', 'SQL'],
  tests: ['xUnit', 'Vitest', 'Playwright'],
  default: 'own the outcome'
};
Features shipped end to end
Data that stays fast at scale
AI output reviewed, never trusted blindly
20
years building production software
TBs
of SQL Server data kept healthy
Built for teams at
DualogElettric80WebService

What I bring

One engineer. Full product perspective.

See how I work ↗
01 / BUILD↗

Full-stack feature delivery

Angular web and React Native mobile interfaces, ASP.NET Core services and APIs, and databases designed for real workloads.

02 / IMPROVE↗

Data & performance

Deadlocks, fragmented indexes, slow queries and caching problems found and fixed, from multi-terabyte SQL Server databases to distributed .NET caches.

03 / ASSURE↗

Testing & AI-assisted delivery

Vitest, Playwright, xUnit and Testcontainers in CI, and AI workflows where every generated change is reviewed before a human sees it.

Experience in the real world

From ships at sea to factory-floor timing.

I work across the stack and stay focused on the business problem behind the code.

Maritime platform

Products for ships connected by satellite.

Full-stack work in Dualog's R&D team on maritime connectivity and cyber-security products, including writing, maintaining and upgrading their automated tests.

AngularASP.NET CorePostgreSQLKubernetes
Real-time & data

Software working in step with warehouse robots.

Ten years on systems that coordinate laser-guided vehicles and track every pallet from production line to truck: multi-terabyte SQL Server databases, deadlock hunting, and Tier 2 support on live production systems.

C#T-SQLSQL ServerReal time
Team multiplier

Better teams share what they know.

I trained interns and interviewed candidates at Elettric80. Now I run show-and-tells on AI-assisted development for a team spread across Norway and Poland, so new techniques never live in one head.

See my experience ↗

Senior enough to see the system. Hands-on enough to ship it.

I value broad technical perspective, direct communication, and ownership. I am always open to useful conversations about software, AI-assisted development, and helping developers grow.

  • 01
    Full-stack engineering

    End-to-end thinking across interfaces, services, data, and delivery.

  • 02
    Data & performance

    SQL Server at multi-terabyte scale, query tuning, and caching.

  • 03
    Code review & mentoring

    Practical guidance grounded in two decades of production work.

Have a hard software problem - or an idea worth discussing?

Tell me what you are trying to achieve. I will respond directly, without a sales layer.

Start a conversation ↗