Open to opportunities

jonathan nilsson

@jonathannilsson

Message

I am a full-stack developer focused on React and TypeScript, delivering performant user-centered fintech tools.

Sweden

Message

What I'm looking for

I’m seeking a mid-level full-stack or front-end role where I can improve UX and performance, collaborate end-to-end with designers/product, and deliver maintainable React/TypeScript solutions using modern tooling and observability.

I’m a full-stack developer with a front-end focus, specializing in React and TypeScript with 5+ years building customer portals and self-service tools for fintech products.

I’ve built a future-proof multi-market form solution with GrowthBook for A/B testing and Sentry for monitoring, optimized form performance with Vite to reduce build size and improve load times, and implemented responsive React/TypeScript UIs using Styled Components and Material UI. I work across backend stacks (Node.js, Express, Koa) and databases (MongoDB, MySQL/SQL) and deploy/manage applications using AWS services like S3, CloudFormation and CodeDeploy.

I collaborate closely with designers and product teams, prioritize user experience and performance, and write clean, testable, maintainable code while following Agile practices and CI/CD workflows.

Experience

Work history, roles, and key accomplishments

Front-end Intern

Arbetsförmedlingen

Nov 2019 - May 2020 (6 months)

Developed a mobile-friendly internal room-and-office locator with an interactive React/Redux map and an Express/MongoDB backend to improve staff navigation and usability.