Senior Fullstack Engineer (Go/TypeScript)

Навыки

• AWS
• CI/CD
• Многопоточность
• Docker
• Feature flags
• GitLab CI
• Go

О компании и продукте

• X-FLOW is a mobile game development company established in 2018. We gained recognition after the release of Happy Color , the most popular digital coloring book and one of the most successful ad-driven mobile apps in the world. We take pride in our diverse and talented team and partners, spread across the UK, Cyprus, the Netherlands, and other regions worldwide.
• We are currently looking for a Senior Fullstack Engineer (Go/TypeScript) for our flagship project, Happy Color .

Задачи

• Design and develop microservices in Go (REST/gRPC), public and internal APIs
• Develop frontend using TypeScript (React) with a focus on performance and Developer Experience (DX)
• Integrate with external services, develop contracts
• Optimize performance, profiling, reduce latency, and scale systems
• Design database schemas, perform migrations, indexing, and query optimization
• Implement and maintain CI/CD, cloud infrastructure (AWS) with Docker/Kubernetes
• Ensure quality: writing tests (unit/integration/e2e), code reviews, automation of checks
• Ensure observability and reliability: logging, metrics, alerting, tracing
• Participate in architectural design, RFCs/ADRs

Требования

• 3+ years of commercial development experience, including 3+ years with Golang and 3+ years with TypeScript
• Proficient in Go: context handling, concurrency (goroutines/channels), profiling (pprof), gRPC/REST, generics, modularity
• Strong frontend skills with TypeScript: React, state management (Redux Toolkit), routing, bundle formation, and optimization
• Databases: PostgreSQL/MySQL, Redis
• design, indexing, transactions
• Queues/Buses: Kafka/NATS — experience in designing event-driven integrations
• CI/CD: GitLab CI, feature flags, migrations, blue‑green/rolling deployments
• Testing: Jest, Playwright
• for Go — testing/testify, integration/e2e
• Security: OAuth2, JWT
• Understanding of DDD principles, SOLID, 12-factor methodology, observability (Prometheus/Grafana, OpenTelemetry)
• Russian - С1/higher, English - B1

Будет плюсом

• Data architecture: CQRS/Event Sourcing, idempotency, deduplication
• Experience building BFFs, WebSockets
• Feature flags, experiments/A-B testing, product metrics
• Technology Stack (Primary)
• Backend: Go, gRPC/REST, PostgreSQL, Redis, Kafka
• Frontend: TypeScript, React, Redux Toolkit, Playwright
• DevOps: GitLab CI, Docker, nice to have: Kubernetes, AWS, Helm
• Observability: Prometheus, Grafana, Loki, OpenTelemetry, Sentry

Условия

• Competitive salary and benefits package
• Opportunity to work with a talented and passionate team in a creative and dynamic environment
• Flexible working hours and remote/office work options
• Career growth and professional development opportunities
• A fun and inclusive company culture that celebrates diversity and creativity
• Join us and let’s create great product together!
• When you apply for this role, we process your personal data in accordance with our Candidate Privacy Notice ( https://xflowgames.com/candidate-privacy-notice )

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