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Backend Developer (Node.js)

Optiplay Poland

IT Services and IT Consulting · 11-50 employees

8 h ago
Remote nodejs Mid (2-5 yrs) Full-time Poland
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About the role

Design, build, and maintain external integrations with casino operators and partner platforms throughout the full lifecycle. Contribute to core backend services, platform features, and game logic development while ensuring system stability and performance.

What they look for

Node.js TypeScript Backend development System design API development PostgreSQL Redis RabbitMQ Kafka Docker Kubernetes AWS CI/CD Integration testing Observability Git

Requirements

Requires 3-5+ years of backend development experience with Node.js and TypeScript, including expertise in designing external integrations. Candidates must have a solid understanding of service-oriented architecture, message brokers, and containerized deployment environments.

Benefits

21 vacation days 2 extra day-offs annually 12 paid sick days Health insurance Gym and fitness budget Work equipment provided Flexible schedule

Full description

We're looking for a Middle+/Senior Backend Developer - first and foremost a strong, well-rounded backend engineer. The role splits roughly 70/30: 70% designing and maintaining our external integrations (casino operators and partner platforms), 30% general backend/platform work and system design.

What you'll do

  • Design, build, and maintain integrations with casino operators and partner platforms (wallet/transaction APIs, game launch, and reporting contracts), owning the full lifecycle from contract design to production monitoring;
  • Build resilient integration layers: retries, idempotency, timeouts, error mapping, and graceful degradation when a third party misbehaves;
  • Contribute to core backend services and platform features - APIs, messaging flows, data models, shared modules;
  • Take part in slot game development on our game logic platform - implementing game mechanics and mathematics alongside the core team;
  • Define and improve integration testing practices: contract testing, mocking/stubs, e2e, and stress/load testing;
  • Work closely with Game Logic, Product, and DevOps teams to keep integration contracts stable as the platform evolves;
  • Participate in code reviews, technical decisions, and architecture discussions across the backend.

What you bring

  • 3-5+ years of backend development experience with Node.js + TypeScript, including ownership of non-trivial systems;
  • Proven experience designing and maintaining external integrations (REST/HTTP, XML/SOAP, RPC-style, or webhook-based);
  • Solid understanding of modular, service-oriented backend architecture, ideally from enterprise or scale-up environments;
  • Practical experience with message brokers (RabbitMQ or Kafka) and event-driven, queue-based design;
  • Strong grasp of integration testing approaches: contract testing, mocking, e2e, and stress testing;
  • Confident with PostgreSQL and Redis, CI/CD, Git, and monitoring/observability tools (Grafana, Loki, Tempo);
  • Comfortable with AWS, Docker, and Kubernetes for containerized deployments.

Nice to have

  • Experience in iGaming, gambling platforms, or RNG/game provider integrations;
  • Familiarity with ArgoCD and GitOps workflows.
  • 21 vacation days + 2 extra day-offs annually;
  • 12 paid sick days;
  • Fully remote format - work from anywhere you feel productive;
  • Flexible schedule: start your day anytime between 08:00-11:00 CET;
  • Fixed budget for health insurance and gym/fitness;
  • Provided all required work equipment;
  • Zero bureaucracy and direct communication with founders and C-level;
  • Minimal meetings, async-friendly workflow;
  • Startup energy: fast motion, creativity, and tight-knit communication;
  • Business trips and team meetups several times per year;
  • Multiple salary payout options (flexible formats);
  • …And many more perks unlocked after we hit break-even.

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