7Generation
Oct 20, 2026 — present
Roman Vassilchenko
I build reliable backend systems that make complex business processes faster and easier to operate. Joined 7Generation on October 20, 2026; previously at Bereke Bank and Ozon.
Go backend engineer · Astana, Kazakhstan · UTC+5
About
I began working professionally with Go in 2023 on Ozon’s hiring platform, then moved to its company-wide employee portal. I later designed credit decision infrastructure at Bereke Bank. Across these roles, my work has stayed at the intersection of distributed systems, business-critical workflows, and production reliability. I care about clear service boundaries, predictable failure handling, and improvements that can be measured in production. I joined 7Generation on October 20, 2026.
Work experience
Bereke Bank
Middle Golang Developer
Sep 2025 — Oct 19, 2026
Unified Credit Pipeline / Auto Loan Issuance
Designed the bank’s unified credit pipeline, government and financial data integrations, and high-load microservice orchestration.
- Took an auto-loan pipeline from pilot to production and reduced issuance time from 40 to 15 minutes.
- Built Kafka-based communication, latency controls, fallback logic, and operational alerting.
Go · PostgreSQL · Camunda · Kafka · Docker · GraphQL · REST
Ozon
Junior Go Backend Engineer
Aug 2024 — Sep 2025
Employee Portal
Built employee data, compliance, office operations, analytics, and document workflows in a three-person backend team.
- Co-designed a monolith split into roughly 10 domain services and reduced employee-data lookup time by 25%.
- Automated attendance workflows for 10,000+ employees; the platform sustained 2,000 concurrent users at rollout.
Go · gRPC · PostgreSQL · ClickHouse · Kafka · Redis · Grafana
Ozon
Go Backend Intern
Dec 2023 — Aug 2024
Hiring Portal
Worked on the core service behind Ozon’s hiring platform and progressed from reporting tasks to on-call production ownership.
- Reduced candidate-search p95 from 1.5–2 seconds to 500–850 ms through SQL and Elasticsearch improvements.
- Built reliable delayed candidate notifications with Kafka and monitoring in Grafana.
Go · gRPC · PostgreSQL · Elasticsearch · Kafka · ClickHouse
Selected work
AdalQarau
Public procurement analytics for Kazakhstan: 15M+ contracts, eight rule-based risk indicators, and 448K risk flags across 20 regions.
Auto-loan issuance pipeline
Production credit workflow spanning Camunda orchestration, Kafka events, PostgreSQL persistence, and external data integrations.
Tools
- Backend
- Go, gRPC, REST, GraphQL, Protobuf
- Data
- PostgreSQL, ClickHouse, Redis, Elasticsearch, Vertica, MinIO
- Systems
- Kafka, Camunda, microservices, event-driven architecture
- Operations
- Docker, Linux, Grafana, Prometheus, Git
Education
B.Sc. Software Engineering
Astana IT University
2023 — 2025
Backend and distributed systems. Previous studies at ITMO University, 2021–2023.
Bachelor thesisContact
The fastest way to reach me is Telegram. Email works too.