Senior Fullstack Engineer (Go/TypeScript)

We are currently looking for a Senior Fullstack Engineer (Go/TypeScript) for our flagship project, Happy Color.

Key Responsibilities:

• 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.

Requirements:

• 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).

Nice to have:

• 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.

What We Offer:

• 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.