Warsaw, Poland · LinkedIn · LearnFlow
Go backend engineer specializing in microservices, event-driven architectures, and
data-intensive systems — including multi-tenant analytics backends and SaaS platforms.
boundary — clean, modular, layered design is an engineering constraint, not a style
preference. I rely on Go's native concurrency — goroutines, channels, bounded worker
pools — for async pipelines and background job processing. Graceful shutdown with
context propagation and structured error handling (%w wrapping, errors.As) are
built in from the start — not added when something breaks. I don't build things I
can't ship and observe.
| Language | Go · goroutines · channels · bounded worker pools |
| Frameworks / HTTP | Gin · net/http stdlib |
| Databases | PostgreSQL · MariaDB · MongoDB · Redis |
| Infra | Docker · GitHub Actions · Jenkins · Linux |
| Observability | Prometheus · Grafana · SonarQube · structured logging |
| Testing | GoConvey · table-driven · integration against real DB |
| Error handling | %w wrapping · errors.As · structured error chains |
| Security | JWT blocklist (Redis) · refresh token rotation + replay detection · fail-closed design · timing-safe auth |
| Payments | Stripe · Przelewy24 |
| Frontend | Vue.js — 3+ yrs production |
Currently Building: LearnFlow
SaaS learning platform in Go — scoped from day one as a production system, not a tutorial app.
Architecture decisions:
| Layer | Decision | Why |
|---|---|---|
| HTTP | stdlib net/http, no framework |
Explicit middleware contracts; full request lifecycle control, no magic |
| Persistence | Raw SQL, no ORM | Full query control over a 32-table schema — no hidden N+1 on complex joins |
| Event delivery | Transactional outbox + Redis queue | Delivery guaranteed under partial failure — handler crash can't silently drop a notification |
| Concurrency | Bounded goroutine pool for queue drain | Prevents goroutine leak under backpressure; controlled parallelism on outbox processing |
| Structure | Clean Architecture · 4 layers · strict inward deps | Domain logic runs without infrastructure; each layer independently testable |
| Observability | Prometheus + Grafana wired from Phase 1 | Observable by design — can't tune what you're not measuring |
Stack: Go 1.26 · PostgreSQL 17 (32 tables · 16 domains) · Redis 7 · Stripe · Przelewy24 · Cloudflare R2 · Resend · Docker Progress: Phase 3 of 9 · actively in development
Go Backend Engineer — Saving Cloud (contract, ended Apr 2026) Multi-tenant analytics backend in Go for marketplace e-commerce — async event-driven pipeline, pluggable multi-platform architecture, idempotency guarantees.
Full-Stack Developer (Go / Vue.js) — Darigo (3 yrs · Germany · Remote) Reduced report generation from 2.5h → 30s.
Full work history → linkedin.com/in/vitaliyzhyryk
Warsaw · open to on-site, hybrid, remote