Staff / Lead Backend Engineer
New
We have an office in Krakow, but if you like to work remotely, that’s absolutely fine. We are OK with fully remote work. For us, you can be located anywhere. :)Full-TimeLead
Salary23,520 - 30,240 PLN per hour
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Job Details
- Languages
- En C1, pl C1
- Experience
- 7+ years
- Required Skills
- Node.jsPostgreSQLSQLTypeScriptNest.js
Requirements
- 7+ years of production backend experience
- Strong production experience with Node.js / TypeScript and NestJS
- PostgreSQL proficiency including query plans, indexes, transactions, and raw SQL
- Expertise in async/event-driven systems (queues, retries, idempotency, job processing)
- Deep knowledge of security practices (OAuth 2.0, RBAC/ABAC, OWASP, audit logs, secrets, permission boundaries)
- Understanding of multitenancy, data isolation, and RLS-style patterns
- Ability to write ADRs and lead architectural decisions
- Experience with agentic coding
- Very strong quality mindset
- Very good command of English and Polish
Responsibilities
- Designing backend architecture for a scalable product
- Developing and maintaining backend services in Node.js / NestJS
- Leading technical and architectural decisions
- Building event-driven systems and queue-based processing
- Ensuring security, observability, and high code quality
- Supporting AI/LLM integrations on the backend side
- Using AI/agentic coding tools in day-to-day development work
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