Go backend developer. 10 years in industrial automation (SCADA, PLC) before moving to software.

I work on backends where the interesting part is not the handler: asynchronous processing through queues, integration with external APIs that fail, media storage, rate limiting, and knowing what the service does when a dependency is down.

Go PostgreSQL Redis NATS JetStream MinIO gRPC REST API Docker Prometheus Grafana GitHub Actions

Linka — commercial REST API + AI worker. Text-to-speech generation runs through a NATS JetStream queue with an audio bank that deduplicates repeated phrases; media lives in MinIO, rate limiting is done in Redis with Lua scripts. I also set up the deployment pipeline and review code.

Yandex.Razvitie — REST API + Telegram bot, Jan — Apr 2026. Backend for a corporate bot: service booking and request tracking, Yandex.Forms webhook integration, files in MinIO, JWT auth. Layered architecture, integration tests on Testcontainers, metrics in Prometheus.

tamper — gRPC fault-injection proxy. Sits between services and injects faults into live traffic: failures and data corruption, at call level and at single messages inside a stream. It knows no protobuf schemas — it relays a call as a bidirectional stream and works with message bytes, so it attaches to any service without code generation. YAML config with hot reload, TLS on both sides.

jot — MCP memory server for AI agents. Four tools, one binary, zero config.

About Go on Habr, in Russian: metrics and tracing · a public mock interview at Yandex · leading a team of juniors

Telegram channel about Go — conclusions from real tasks and what to watch for in implementation.

Telegram: @SergeyEn123
Email: sr.kolomiichuk@yandex.com