Backend Developer, Node.js

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🔥 0 minutes ago

🌐 Ukraine, Germany, +3 more countries – Remote

🇺🇦 Ukraine – Remote 🇩🇪 Germany – Remote 🇸🇰 Slovakia – Remote 🇨🇾 Cyprus – Remote 🇵🇱 Poland – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

🔙 Backend Engineer

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OptiPlay

WebsiteLinkedInAll Job Openings

11 - 50 employees

🎮 Gaming

🤝 B2B

🔌 API

Gaming • B2B • API

OptiPlay is a B2B iGaming content provider that builds premium HTML5 casino slot games and white‑label game integrations for licensed operators and platform partners. The company offers a REST API and sandbox for rapid integration, certified RNG and independently tested game mathematics, configurable RTP/volatility, cross‑platform (desktop, mobile, tablet) titles built with PixiJS/HTML5, and responsible‑gaming features. OptiPlay highlights 10+ released games, 50+ operator partners across 20+ regulated markets, multi‑language and multi‑currency support (including crypto), and 24/7 partner support. It is incorporated in 2025 and positions itself as an operator‑focused, fast‑shipping provider of certified slot content.

📋 Description

• Design, build, and maintain integrations with casino operators and partner platforms, including wallet/transaction APIs, game launch, and reporting contracts • Own the full integration lifecycle from contract design to production monitoring • Build resilient integration layers with retries, idempotency, timeouts, error mapping, and graceful degradation • Contribute to core backend services and platform features, including APIs, messaging flows, data models, and shared modules • Participate in slot game development by implementing game mechanics and mathematics alongside the core team • Define and improve integration testing practices, including contract testing, mocking/stubs, end-to-end, and stress/load testing • Collaborate with Game Logic, Product, and DevOps teams to maintain stable integration contracts • Participate in code reviews, technical decisions, and backend architecture discussions

🎯 Requirements

• 3-5+ years of backend development experience with Node.js and TypeScript, including ownership of non-trivial systems • Proven experience designing and maintaining external integrations using REST/HTTP, XML/SOAP, RPC-style, or webhook-based interfaces • Solid understanding of modular, service-oriented backend architecture, ideally from enterprise or scale-up environments • Practical experience with RabbitMQ or Kafka and event-driven, queue-based design • Strong grasp of contract testing, mocking, end-to-end testing, and stress testing • Proficiency with PostgreSQL, Redis, CI/CD, Git, and monitoring/observability tools such as Grafana, Loki, and Tempo • Comfortable with AWS, Docker, and Kubernetes for containerized deployments • Experience in iGaming, gambling platforms, or RNG/game provider integrations • Familiarity with ArgoCD and GitOps workflows

🏖️ Benefits

• 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.