Full-Stack Developer in Bitcoin startup 🔥 ESOP available 🚀
About Firefish
Firefish is a startup with big ambitions. We’re building a secure platform for BTC-backed lending. No corporate hierarchy, no endless meetings – just a small team of people who know what they’re doing, get things done, and stand behind what they build.
What you’ll do
Develop in a modern stack: React, GraphQL, Node.js, and TypeScript
Contribute to managing our AWS infrastructure (Lambda, RDS, S3, EC2, Bitcoin nodes)
Help tackle security challenges related to Bitcoin and sensitive financial data
Contribute to maintaining the Bitcoin node and Rust-based tools
Write clean, secure, and maintainable code while improving our codebase
Bring ideas to the table and actively shape both the product and technology
Who we’re looking for
Experienced full-stack developer (TypeScript, Node.js, React)
Knowledge of AWS DevOps (infrastructure as code, scaling, security) is a plus
Bonus: Rust experience
Ownership mindset – able to take responsibility and drive things to completion
Passion for Bitcoin is a big advantage
Why Firefish
Equity options – real chance to earn a stake in the company
Small team, big impact – no hiding behind processes
Hybrid setup (Prague, Dejvice + remote flexibility)
Work on real Bitcoin products
Freedom, responsibility, and an engineering-driven culture
📩 Sounds like a challenge for you? Let’s talk.