Freelance availability · Q3 + Q4

Freelance
Software
Engineer.

I help product teams design, build, and operate ambitious web applications — from initial prototype to a stable production deployment with real users. Preferably projects with real business impact.

Get in touch See my work

Where I happily lend a hand

  • №01

    End-to-end SaaS development

    Conception, API design, data modeling, frontend development, and deployment — web applications from initial idea to production with real users.

  • №02

    Tech Lead on demand

    Architecture reviews, mentoring, and targeted problem analysis — for teams that need senior expertise on a part-time basis.

  • №03

    Backend that scales

    NestJS and Node.js, REST and GraphQL APIs, and well-designed MongoDB schemas built for long-term maintainability.

  • №04

    Frontend modernization

    Refactoring existing Angular and React codebases, performance optimization, and durable design systems.

The tools I work with

Not an exhaustive list — these are the technologies I can confidently recommend from daily practice.

TypeScript Angular React NestJS Node.js MongoDB Docker Kubernetes iOS (Swift) Android (Kotlin)

Got something concrete?

Let's talk. A short outline of your project is enough to get started — I typically reply within 1–2 business days.

hello@jan-kessler.com