Mid/Senior AI-Native Engineer

The shift we’ve already made
At Kryptonim, agents produce the majority of our code. Engineers scope problems, review output, and own what ships. Less keystrokes, more judgment. If that sounds like where you want to be heading – keep reading.

You will join a remote team with a possibility to work from a Warsaw office.

Your responsibilities:

• Own what you ship. Agents write the code; you’re accountable for its correctness, security, and production behavior.
• Work with AI daily. Design and run agentic workflows to build backend systems in Go – scope, delegate, review, ship.
• Improve the dev loop. Help evolve how the team works with AI: prompts, skills, evals, review rituals, CI integration.
• Guard the architecture. Keep the system healthy as we add KYC, payment, and on-chain flows – data contracts, state machines, idempotency, audit trails.
• Decide and move. When the spec has gaps, you close them: pick a path, document the assumption, ship.
• Take features end-to-end. Go from fuzzy business problem to production, including the parts nobody explicitly asked for.
• Review with equal care. Human code or agent code – same standard. Write the tests that buy real confidence.

Minimum qualifications:

• Comfort working with AI agents. You’ve used agentic tools beyond autocomplete – multi-step workflows, tool integrations, structured prompting. You can explain when you overrode the agent and when you let it run. If you’re earlier on this path but genuinely motivated to learn, that counts too.
• Judgment under ambiguity. You notice when a spec leaves a gap, decide, document it, and keep going.
• Security instinct. Signature verification, replay protection, short-lived credentials, secrets discipline, log masking – these show up in your code without a checklist.
• Systems thinking. Idempotency, clean integration layers, state machines, observability from day one. You see what a system will need at scale.
• Backend depth. 4+ years of  experience building backend products. Solid understanding of HTTP, REST, relational modelling, migrations, async processing (queues, retries, DLQs).
• Domain curiosity. Interest in fintech, payments, and crypto.
  
  
  Nice to Have :
• Go – our primary backend language; strong fundamentals speed you up meaningfully.
• PostgreSQL– schema design, migration management, views, query optimization
• Web3 basics – EVM, ERC-20, on-chain events, wallet auth. Fintech or regulated-product experience.
• Docker, Kubernetes, AWS/GCP, CI/CD.
• Understanding of async processing: Job queues, background workers, retry and dead-letter strategies, event-driven patterns. You know why “fire and forget” doesn’t work in production.