Fullstack Developer

Senior Full Stack TypeScript Engineer - Fintech

remote/b2b/35-45€/h

Join a leading fintech company with 25+ years of innovation in the financial markets. Our platform connects participants in repo and securities financing, delivering real-time solutions that enable clients to trade efficiently, accurately, and competitively. We foster autonomous, agile, and technology-driven teams with a strong focus on product excellence, innovation, and collaboration.

We are seeking a Senior Full Stack TypeScript Engineer to develop high-performance web applications and backend services, shaping the next generation of fintech solutions.

Requirements / Skills:

• Extensive experience with TypeScript & JavaScript (ES6+)

• Strong Node.js backend expertise

• Advanced React, HTML5, CSS skills

• Deep understanding of RESTful APIs (HTTP, JWT, OAuth)

• Experience with relational databases (PostgreSQL / MySQL)

• Proficiency with Git, Linux/Unix CLI, npm/pnpm

• Unit, integration, and E2E testing (Playwright, Cypress, etc.)

• Web performance optimisation and scalable system design

• Practical experience using AI-assisted development tools (e.g., GitHub Copilot, Cursor, Claude, Gemini)

• Strong critical thinking to validate AI-generated code for security, maintainability, and performance

• Code review, documentation, and mentoring skills

• Ability to take ownership of complex features and drive delivery

• English - professional working proficiency

• Location Requirement: Candidates must be physically based within the European Union (EU)

Desirable / Plus:

• D3.js (data visualisation)

• Redux / Zustand / Context API

• Tailwind / Styled Components

• Docker / Terraform / AWS Lambda

• Load testing tools

If you thrive in a fintech, innovative, and collaborative environment and want to push the boundaries of financial technology, this role is for you.