Senior Backend Developer with 7+ years building high-load systems, distributed services, and clean architectures. I care about correctness, resilience, and code that's easy to reason about.

Currently: open to remote backend roles (international / CIS).

• Languages — PHP (5.x–8.x), Go, Node.js, TypeScript, JavaScript, SQL
• Frameworks — Laravel, Symfony, Zend, Spiral · Express.js, Vue.js/Vuex, React
• Go libraries — Fiber, Gorm, Testify
• Architecture — Monolith, Microservices, DDD, CQRS, BDD · SOLID, KISS, DRY, GRASP
• Databases — MySQL, MariaDB, PostgreSQL · Redis, MongoDB, Cassandra · query optimization (EXPLAIN/ANALYZE, index tuning)
• Search & analytics — Elasticsearch, ClickHouse, Kibana
• Messaging — RabbitMQ, Apache Kafka
• Service communication — REST, gRPC, WebSockets
• Infra & DevOps — Docker, Docker Compose, Docker Swarm, Kubernetes · Nginx, Apache, RoadRunner, Traefik · Ansible · Linux (Ubuntu, CentOS)
• CI/CD — GitLab CI/CD, GitHub Actions, Git
• Monitoring — Prometheus, Grafana
• Testing & quality — PHPUnit, Codeception, Symfony Panther, Laravel Dusk, Jest, Infection · PHPStan, Psalm, Rector
• AI/LLM — RAG pipelines, pgvector, OpenAI Embeddings & function calling, semantic search, chunking strategies, SSE streaming, Redis embedding cache, JSON-schema output validation, prompt engineering

booking — Booking aggregator in Go on a Ports & Adapters (Hexagonal) architecture. Each tour operator is a pluggable adapter; requests fan out concurrently with per-operator timeouts and graceful degradation, so one slow operator never breaks the response.

rag-service — RAG microservice in Go: ingest → chunk → embed → pgvector semantic search, with a Redis embedding cache and streaming answers over SSE. Every external service (OpenAI, pgvector, Redis) sits behind a port.

seo-crawler — Concurrent SEO crawler / hreflang checker in Go. Bounded worker-pool crawl with pluggable checkers for canonical tags, hreflang reciprocity, broken links, and meta issues across multilingual sites.

currency-notification — FX rate alert daemon in Go. Polls exchange rates on a quota-aware schedule, evaluates personal threshold/change rules with cooldown, and pushes Telegram alerts. Swappable rate providers behind a port.

translate-checker — CLI in Go that audits Laravel translation files across locales — missing/empty/orphan keys, placeholder mismatches, untranslated strings — with CI-friendly exit codes to block broken merges.

• Working across CIS & international markets

Ping me if you're hiring senior backend or just want to talk architecture.