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Achievements

Achievement: Pull Sharkx2Achievement: QuickdrawAchievement: YOLOAchievement: StarstruckAchievement: Arctic Code Vault Contributor

Achievements

Achievement: Pull Sharkx2Achievement: QuickdrawAchievement: YOLOAchievement: StarstruckAchievement: Arctic Code Vault Contributor

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RomanVassilchenko/README.md

Roman Vassilchenko

Go Backend Engineer • High Load Systems • Distributed Architectures

Website Email Telegram LinkedIn

Experience

Ozon

Go Backend Engineer @ Ozon (2023 – Present)

Building high-load systems and distributed microservices for HR-tech platforms serving 60,000+ employees.

Key Achievements:

  • Optimized SQL queries 8× (150ms → 18ms)
  • Boosted ElasticSearch performance 2.5×
  • Migrated legacy monolith to microservices → -25% core load
  • Created shared internal library (staff-lib) adopted across dozens of services

Projects

Project Description Stack
AdalQarau (ex-DACA) Public procurement analytics for Kazakhstan. Risk scoring, graph relations, Excel exports. Used by law enforcement agencies. Go, PostgreSQL, MinIO, Kafka, GraphQL, Buf
Staff Portal 2.0 Next-gen internal HR portal: microservices, real-time analytics, smart routing. Go, PostgreSQL, Kafka, Redis, Grafana
Matrix Hiring System High-scale point-hiring workflow management. Go, PostgreSQL, ElasticSearch, Kafka

Tech Stack

Backend & Infrastructure

Go PostgreSQL Kafka Redis

Monitoring & Observability

Grafana Prometheus Loki

Tools & APIs

Docker GraphQL Protobuf

Education

Degree Institution Years Notes
B.Sc. (Years 1-2) ITMO University 2021–2023 Core CS & Engineering Fundamentals
B.Sc. (Years 3-4) Astana IT University (AITU) 2023–2025 Backend & distributed systems focus
M.Sc. Computer Science & Engineering Astana IT University (AITU) 2025–2027 Research: high-load distributed systems & ML (performance & reliability)

GitHub Stats

Current Status

Full-time Employed

Focused on high-performance Go microservices, performance tuning, and observability (metrics, tracing, logging).

Open to future opportunities — contact via Telegram · Email

Pinned Loading

  1. simple-url-shortener simple-url-shortener Public archive

    A simple but powerful pet project written in golang using the chi library - Simple URL Shortener

    Go 5 1

  2. ITMO-My-Projects ITMO-My-Projects Public archive

    Мои лабораторные работы, методички и другие материалы, которые я собрал во время учебы в ИТМО на Факультете ПИиКТ (СППО) 2021-2023

    C 46 1