Вадим

VADYM KOPACHEV
Senior Full-Stack Engineer — React · Node.js · TypeScript
Ukraine (UTC+2/+3) · Remote · [open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)
GitHub: github.com/kopachevvadym

SUMMARY

Full-stack engineer with 6+ years of commercial experience building and shipping product features in
React, TypeScript, and Node.js for startup and product teams. I own features end-to-end, from
requirements with Product Owners through to production via CI/CD, and have often been the sole
engineer on a project. Recent work includes CRM and sales-funnel integrations, MongoDB
performance tuning, and a Webpack-to-Rspack migration that cut local startup time roughly 10×.

SKILLS

Languages: TypeScript, JavaScript, Go (Golang), Python, Dart, PHP
Frontend: React, Next.js, Redux Toolkit, React Query, Vue.js, HTML5, CSS/SCSS, Material Design, Figma
Backend: Node.js, Express, NestJS, REST APIs, Webhooks, WebSocket (Socket.io)
Databases: PostgreSQL (Postgres), MongoDB, Redis, Cassandra
DevOps & Tooling: Docker, Docker Compose, GitLab CI/CD, AWS, Linux, Rspack, Webpack
Mobile: Flutter, Dart
Spoken: Ukrainian (native) · English (intermediate, B1)

EXPERIENCE

Voopty | Full-Stack Developer Feb 2024 – Feb 2026
• Migrated the frontend build from Webpack to Rspack, cutting local dev-server startup time roughly
10×.
• Shipped product features end-to-end, from concept with Product Owners through to production,
across a React/TypeScript frontend and an Express/MongoDB backend.
• Built REST API and webhook integrations powering CRM workflows and sales-funnel automation.
• Refactored large React components into reusable, maintainable units and refined key UI flows,
improving both user experience and developer experience.
• Optimized MongoDB queries for performance.
Tech: React, TypeScript, Express, MongoDB, Redis, Docker, Material Design, Rspack, Webpack

Joyn Chat | Full-Stack Developer Feb 2023 – Sep 2023
• Rewrote part of the Go backend in NestJS (TypeScript).
• Implemented real-time chat features, including message reactions and live interactions.
Tech: Flutter, Dart, Go, NestJS, Cassandra, Docker

Software Planet Group | Full-Stack Developer Jul 2019 – Dec 2022
• Frequently the sole engineer on client projects, owning the full lifecycle from requirements through
deployment.
• Built a SaaS photo gallery with face recognition, including an algorithm that groups photos by
person.
• Defended production infrastructure against DDoS attacks, minimizing downtime and performance
impact.
• Containerized applications with Docker Compose and configured CI/CD pipelines.
• Mentored junior developers and ran code reviews.
Tech: React, Redux, React Query, Vue.js, NestJS, Express, Socket.io, TypeScript, Python, Go, PostgreSQL, Docker,
SCSS, PHP

EDUCATION

Master’s, Information & Computer Science — ISMA, Riga, Latvia 2022 – 2023
Bachelor’s, Information & Computer Science — KNUTD, Kyiv 2019 – 2021