Fullstack Developer

Scalac

Poland · Full-time · Not Applicable

💻 Senior Full Stack TypeScript Engineer – Fintech

📍 remote/b2b/30-40€/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
Polish – minimum B2 level

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.

Key Skills

Ranked by relevance

typescript ai restful apis javascript postgresql terraform react mysql html5 oauth css git aws

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