go developer for mobile games

X-FLOW is a mobile game development company established in 2018. Its flagship product, Happy Color, is a popular digital coloring book and a successful ad-driven mobile app.

• Design and develop Go microservices using REST/gRPC, including public and internal APIs;
• Integrate with external services and develop contracts;
• Optimize performance, profile systems, reduce latency, and scale systems;
• Design database schemas and perform migrations, indexing, and query optimization;
• Work with PostgreSQL/MySQL, Redis, Kafka/NATS, and event-driven integrations;
• Implement and maintain CI/CD and AWS cloud infrastructure with Docker/Kubernetes;
• Ensure quality through unit, integration, and end-to-end testing, code reviews, and automated checks;
• Ensure observability and reliability through logging, metrics, alerting, and tracing;
• Participate in architectural design, RFCs, and ADRs.

• 3+ Years of commercial development experience, including 3+ years with Golang;
• Proficiency in Go, including context handling, concurrency with goroutines/channels, pprof profiling, gRPC/REST, generics, and modularity;
• Strong understanding of backend architecture, API design, microservices, and distributed systems;
• Experience with PostgreSQL/MySQL and Redis, including database design, indexing, and transactions;
• Experience designing event-driven integrations with Kafka/NATS;
• Experience with GitLab CI, feature flags, migrations, and blue-green/rolling deployments;
• Experience with Go testing/testify and integration/e2e testing;
• Knowledge of OAuth2 and JWT;
• Understanding of DDD principles, SOLID, 12-factor methodology, and observability with Prometheus/Grafana and OpenTelemetry;
• Russian at C1 or higher;
• English at B1;
• Nice to have: Experience with search technologies such as OpenSearch, Python and/or PHP, TypeScript, JavaScript and React, CQRS/Event Sourcing, idempotency, deduplication, BFFs, WebSockets, feature flags, experiments/A-B testing, and product metrics.

• Competitive salary and benefits package;
• Flexible working hours;
• Remote/office work options;
• Career growth and professional development opportunities;
• Inclusive company culture that celebrates diversity and creativity;
• Employment Contract.