Open to offers

Nazar Koshkin

Senior Java / Go Backend Developer

I design microservices and high-load integrations, and automate workflows with AI agents.

Moscow · remote only

Telegram nzrkshkn@yandex.ru +7 993 309-43-02 GitHub LinkedIn

5+years in production

500+RPS on a Go BFF at VTB

−30%fewer integration-layer calls

5microservices built from scratch

About

Backend engineer with 5+ years of commercial experience in FinTech, HotelTech and video streaming. I design and evolve microservices, integrations and distributed systems, and take part in architecture decisions, code review and CI/CD.

Over the last year I have gone deep into automation: n8n, LLMs, MCP servers and multi-agent workflows. I value projects with room to grow and a friendly team.

Stack

Java

Java 8/11/17
Spring Boot 2/3
Spring Cloud
Spring Data
WebFlux
Reactor
JPA/Hibernate
JUnit
Mockito

Go

Go
gRPC
Protobuf
goroutines
channels
Gin
Echo

Data & messaging

PostgreSQL
Redis
Kafka
RabbitMQ
Liquibase

Architecture

Microservices
Highload
Event-driven
BFF
REST
GraphQL
SOAP
Camunda
Zeebe

DevOps

Docker
Kubernetes
Helm
GitLab CI/CD
Jenkins
ELK
Prometheus
Grafana

AI

LLM
MCP servers
n8n
AI agents
Claude Code
Codex

Experience

Independent projects
Nov 2025 — now

Backend Developer, AI Automation Engineer
- Telegram bots, backend services and business process automation
- AI agents and multi-agent workflows
- parserUserBot, hermes-kanban-miniapp, music-orchestrator
- Go
- Python
- TypeScript
- n8n
- Docker
Innotech Group, VTB project
Jan 2024 — Jan 2026

Java / Go Backend Developer
- Designed and built a Go BFF service handling 500+ RPS
- gRPC between Java and Go services
- Optimized integration-layer AOP: 25–30% fewer calls
- Tax service (FNS) integration adapter, sensitive data encryption in PostgreSQL
- Migration to Java 17 and Spring Boot 3
- Java 17
- Spring Boot 3
- Go
- gRPC
- Kafka
- PostgreSQL
- GraphQL
Bnovo, HotelTech
Feb 2022 — Jan 2024

Java Backend Developer
- Built 5 microservices end-to-end: architecture, API, tests, CI/CD
- Booking engine core: rates, rooms, services
- Camunda/Zeebe business processes
- Raised test coverage of key modules to 80%
- Java 17
- Spring Cloud
- Camunda
- Kubernetes
- Jenkins
WeWe Cams, video streaming
Nov 2020 — Mar 2022

Java Backend Developer
- Idempotent transactional model for in-app currency
- Event-driven achievements system
- Tuned reactive Spring WebFlux pipelines
- Java 8
- WebFlux
- Reactor
- PostgreSQL