Senior Backend Engineer (Node.js / TypeScript) – Platform Team

📍 Kraków, Poland · on-site ~4 days/week · full-time, CET

Are you a backend engineer who cares about what happens after the merge: pipelines, deploys, metrics, alerts? This role is for you

About the role

The platform team builds the foundation for all product engineers: shared libraries, core services (assets, auth, gateways), CI/CD and observability for cloud SaaS products. Strong backend experience plus hands-on DevOps is what we're looking for

What you'll do:

• Build shared libraries, SDKs and internal backend services
• Keep GitHub Actions CI/CD fast, reliable and secure
• Evolve observability: metrics, logs, traces, alerts
• Improve developer experience: templates, scaffolds, local-dev tooling
• Support product teams with design reviews
• Join the team's on-call rotation

Must-have:

• 4+ years with Node.js & TypeScript in production
• Solid grasp of Node.js internals: event loop, memory, async I/O
• PostgreSQL beyond CRUD: query plans, indexes, slow queries and migrations
• Hands-on AWS: DynamoDB, SQS, Kinesis, Lambda (no need to be an expert in all four)
• Building and maintaining CI/CD pipelines, ideally on GitHub Actions
• Practical observability: metrics, dashboards, alerts (Prometheus, Grafana, OpenTelemetry, Datadog or similar)
• Confident, critical use of AI coding tools (Claude Code, Cursor, Copilot)
• Experience in distributed teams across time zones

Nice to have:

• NestJS, Kubernetes, Terraform, gRPC
• SLIs/SLOs or release-flow design
• Mentoring or tech-lead experience

Why join:

• Every product team relies on what you build
• The team owns its roadmap
• A natural step from backend into platform engineering

Send your CV to recruiter contact or DM Hanna Belchykava 📩