Serhii Kushnerov

Backend / Systems Engineer (Java/Python). Open to a wide range of work: from quick fixes and maintenance to full backend delivery, including Minecraft-related projects.

What I typically deliver:

• Backend / API: Spring Boot / FastAPI, REST APIs, third-party integrations, data validation, API docs (Swagger/OpenAPI)

• Databases: PostgreSQL/MySQL — schema design, migrations, indexing, query optimization for real read/write patterns

• Data pipelines / ingestion: multi-source collectors, batching/concurrency, retries/backoff, per-source failure isolation, resilient processing

• Automation & bots: Telegram/Discord bots, scripts, parsers, notifications, reporting, API integrations

• Reliability & observability: structured logging, metrics (Prometheus when needed), clear error handling and recovery paths

• Basic DevOps: Docker, environment configuration, reproducible run/deploy workflows

• Minecraft (server-side): plugins/mods, performance/high-load tuning, metrics/monitoring (Prometheus), multi-version support (Paper/Fabric/Forge/NeoForge)

How I work: align requirements and boundaries → provide a plan/estimate → deliver in short iterations with checkpoints → ship a clean final result. Clear communication, realistic timelines, and upfront risk callouts.