Senior Ruby on Rails Developer

🕒 September 21

🌐 Poland, Serbia, +3 more countries – Remote

🇵🇱 Poland – Remote 🇷🇸 Serbia – Remote 🇱🇹 Lithuania – Remote 🇨🇾 Cyprus – Remote 🇬🇪 Georgia – Remote

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 11%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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SOFTSWISS

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

💼 Consulting

📣 Marketing

🎮 Gaming

Consulting • Marketing • Gaming

SOFTSWISS is a leading provider of iGaming software solutions, offering a wide range of products including iGaming Platform, Sportsbook Platform, Game Aggregator, Jackpot Aggregator, and more. Established in 2009, SOFTSWISS has grown to employ over 1,700 people across 4 international offices in Poland, Georgia, Malta, and several remote locations. The company is known for its innovation in the iGaming industry, being the first Crypto iGaming provider in the world. SOFTSWISS not only promotes a dynamic and flexible work culture with comprehensive employee benefits but also commits to social responsibility by supporting various campaigns and initiatives.

📋 Description

• Design, build, and evolve Ruby on Rails services powering the iGaming platform • Develop high-throughput APIs, payment and wallet flows, real-time game integrations, and back-office tooling • Use coding assistants and AI agents for scaffolding, refactoring, test generation, and code review while owning merged code quality • Integrate LLM-based features into the product for fraud and risk signals, player-support automation, content generation, and internal analytics copilots • Profile hot paths, tune PostgreSQL queries, design caching and background-processing strategies, and drive incidents to root cause • Review human- and AI-written code • Mentor mid-level engineers and help set standards for responsible AI use • Participate in architecture discussions, technical planning, and cross-team initiatives

🎯 Requirements

• 4+ years of commercial Ruby on Rails experience • Deep understanding of Ruby internals, Rails conventions and where to break them • Strong SQL and PostgreSQL skills, including indexing, query planning, and migrations on large tables without downtime • Solid grasp of distributed-system fundamentals, including message queues, idempotency, eventual consistency, background jobs (Sidekiq or similar), and caching (Redis) • Hands-on experience with AI coding tools in day-to-day work • Ability to evaluate and verify AI-generated code and critically write and read tests • Experience designing and consuming REST and/or gRPC APIs • Familiarity with OpenAPI • Confident with Git, CI/CD pipelines, and Docker • Comfortable reading Kubernetes manifests and logs • Experience with observability tooling such as Prometheus/Grafana, Sentry, or OpenTelemetry • Upper-Intermediate or higher English and Russian level • Experience integrating LLM APIs into production Ruby applications, including prompt design, structured outputs, evaluation, and cost and latency control • Familiarity with RAG pipelines, vector databases, or agent frameworks • Understanding of security and data-privacy implications of AI features • Experience in fintech, payments, or iGaming • Knowledge of regulatory and responsible-gaming requirements • Contributions to open-source Ruby projects, talks, or technical writing • Working knowledge of Go, Elixir, or TypeScript for cross-service work

🏖️ Benefits

• Private health insurance • Sports benefits • Comprehensive Mental Health Program • Free English lessons (online) • Local language courses • Paid time off • Maternity leave support • Referral program rewards • Upskilling, internal workshops, and participation in professional conferences and corporate events