Fullstack Engineer / AI Engineer for BRAIINS MANAGER

We build the software that runs a meaningful share of the world's Bitcoin mining hardware. Alongside our flagship Braiins OS+ and Braiins Pool (the world's first Bitcoin mining pool), we build Braiins Manager — the cloud platform for remote fleet management — and the desktop tooling that goes with it.

We're looking for a fullstack engineer who is equally comfortable shipping a feature end to end and building the AI tooling the rest of the team develops with. Not a prompt specialist bolted onto a product team — an engineer who happens to be very good at getting real work out of models.

Do you wanna know more about Braiins? Check our [Cocuma profile!](

⚙️ What you'll actually work on

You'll own features across the full lifecycle: architecture and design, implementation on both sides of the wire, then troubleshooting it in production when a customer with thousands of miners hits an edge you didn't predict.

You'll join an international, multidisciplinary, fully remote team , with a flat structure and short paths to a decision.

What we're looking for

• Strong TypeScript, both ends. Node.js on the server (NestJS or equivalent) and a modern SPA framework (Angular, React, Vue). Real depth on one side, genuine competence on the other — we're not looking for someone who "also touches the frontend."
• SQL that goes past the ORM. PostgreSQL, relational modeling, migrations, and the judgement to know when the query builder is the wrong tool.
• Hands-on experience shipping with LLMs. Tool/function calling, MCP, retrieval, agent orchestration, evals — any credible subset. Equally valid: you've pushed coding agents hard enough on real codebases to have opinions about where they break.
• Git, Docker, CI. The daily toolchain, not a checkbox: readable history and clean branches, a service you can containerise yourself, and a pipeline you can fix when it goes red. Kubernetes is a plus, not a gate.
• Comfort with asynchronous, distributed systems. Queues, at-least-once delivery, idempotent handlers, retries and backpressure — and what each of those costs. Microservice architecture, observability stacks, time-series or telemetry data at scale.
• REST and gRPC ; a working understanding of what's underneath them.
• Tests you'd defend in review — unit and integration, and the judgement to pick.
• Debugging as a core skill. Reading a stack trace, a slow query plan and a metrics dashboard with equal comfort.
• Solid grasp of algorithms and data structures.
• English at a communicative level , and the self-direction a remote team needs.

✨ Nice to have — genuinely optional

• Rust. We have a real Rust codebase and you can go as deep into it as you want. It is not a requirement and not something we screen on — if you come from C, C++ or Go, or simply want to learn it here, that's a welcome bonus, nothing more.
• Python — our agent orchestration tooling lives there.
• Frontend craft: design systems, accessibility, bundle and rendering performance.
• An interest in Bitcoin or active experience with cryptocurrencies.

What we offer

• Full-time position with flexible working hours, employee or freelance.
• Indefinite contract.
• For employees: 5 weeks of vacation and 3 sick days.
• Fully remote, with modern offices in the centre of Prague if you want them — relaxation room, shower, parking.
• Company events and the occasional Braiins brunch.
• A generous budget for AI tooling, and the freedom to use it properly.
• Long-term work on products used daily by industrial-scale mining operations.

Interested? Tell us what you've built — a repo, a system you're proud of, or an agent setup that actually earns its keep. We'd rather read that than a cover letter.