Senior Ruby on Rails Developer (AI‑augmented)

About the role

SoftSwiss is expanding its iGaming platform and seeks a Senior Ruby on Rails Developer to design and maintain high‑load services. You will work in an AI‑augmented workflow, building APIs, payment flows and real‑time game integrations for millions of players.

Key responsibilities

• Design, build and evolve Ruby on Rails services powering the iGaming platform, including high‑throughput APIs, payment and wallet flows, real‑time game integrations and back‑office tools.
• Use AI coding assistants (e.g., Cursor, Claude Code, GitHub Copilot) for scaffolding, refactoring, test generation and code review while taking full responsibility for merged code quality.
• Integrate LLM‑based features such as fraud detection, player‑support automation and internal analytics copilots.
• Own performance and reliability: profile hot paths, optimise PostgreSQL queries, design caching and background‑processing strategies, and drive incidents to root cause.
• Review both human‑ and AI‑written code, mentor mid‑level engineers and set standards for responsible AI usage.
• Participate in architecture discussions, technical planning and cross‑team initiatives.

Required profile

• 4+ years of commercial Ruby on Rails experience with deep knowledge of Ruby internals and Rails conventions.
• Strong SQL and PostgreSQL expertise, including indexing, query planning and zero‑downtime migrations.
• Solid understanding of distributed‑system fundamentals: message queues, idempotency, eventual consistency, background jobs (Sidekiq) and caching (Redis).
• Hands‑on experience with AI coding tools and the ability to evaluate and verify AI‑generated code.
• Experience designing and consuming REST and/or gRPC APIs; familiarity with OpenAPI.
• Proficiency with Git, CI/CD pipelines, Docker and basic Kubernetes manifests.
• Experience with observability tooling such as Prometheus, Grafana, Sentry or OpenTelemetry.
• Fluent English (B2 or higher) for technical documentation and code reviews.

Required skills

• Ruby
• Ruby on Rails
• PostgreSQL
• SQL
• Sidekiq
• Redis
• Docker
• Kubernetes
• Git
• CI/CD pipelines
• REST APIs
• gRPC
• OpenAPI
• Prometheus
• Grafana
• Sentry
• OpenTelemetry
• AI coding assistants (Cursor, Claude Code, GitHub Copilot)