Senior Ruby Engineer

Accountabilities

• Design and implement new backend features supporting high-load gaming and real-time platform functionality.
• Participate in architectural decisions in collaboration with engineering leadership to ensure scalability and long-term maintainability.
• Optimize system performance, focusing on latency, concurrency, throughput, and overall reliability under heavy load.
• Ensure robustness of financial and transactional systems, including idempotency, consistency, retry logic, and fault tolerance.
• Develop and maintain APIs for frontend applications and external partners, ensuring performance and reliability.
• Build and support integrations with third-party platforms, aggregators, and external gaming or service providers.
• Improve CI/CD pipelines, deployment workflows, and monitoring systems to enhance delivery efficiency and system observability.
• Collaborate with SRE and QA teams to ensure system stability, performance testing, and release readiness.

Requirements

• 4+ years of backend development experience with strong expertise in Ruby on Rails in production environments.
• Proven experience working with high-load or real-time distributed systems, preferably in gaming, fintech, or similar domains.
• Strong understanding of REST APIs, microservices, event-driven architecture, or modular monolith design.
• Solid experience with PostgreSQL and Redis in production systems.
• Deep understanding of data consistency models, including ACID transactions and eventual consistency.
• Hands-on experience implementing idempotent operations, retry mechanisms, and fault-tolerant systems.
• Experience working with background job processing systems such as Sidekiq, Kafka, or similar technologies.
• Strong knowledge of Docker, Kubernetes, and modern cloud-native infrastructure.
• Experience with CI/CD tools such as GitHub Actions, GitLab CI, or equivalents.
• Ability to read, analyze, and refactor complex codebases, with experience in code review practices.
• Strong English communication skills for technical documentation and cross-team collaboration.

Benefits

• Flexible remote-first work environment, with the option to work from anywhere.
• Official employment support in Ukraine or Poland, including assistance with administrative processes.
• 20 paid vacation days, public holidays, and sick leave to support work-life balance.
• Comprehensive medical insurance and psychological support coverage.
• Monthly flexible benefits budget for personal interests, hobbies, sports, or wellness.
• Access to professional development programs, training budgets, corporate English classes, and online learning resources.
• Regular team events, workshops, and offsite activities.
• Clear career progression framework with performance reviews, mentoring, and growth opportunities.
• Collaborative, engineering-driven culture with low bureaucracy and strong focus on autonomy and innovation.