Дмитро

Dmytro Chumak
Backend Engineer | Node.js / NestJS
Ivano-Frankivsk, Ukraine • [open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section) • LinkedIn • GitHub

PROFILE

Backend-oriented Software Engineer with 3+ years of commercial experience developing CRM backends, business logic,
SQL workflows and REST API integrations. Commercial experience with PHP, JavaScript, MySQL and SuiteCRM,
complemented by Node.js/NestJS and TypeScript projects. Focused on API design, data modelling, controlled integrations
and practical workflow automation.

WORK EXPERIENCE

Jul 2023 – Present Full Stack Developer, CRM Studio
• Developed custom SuiteCRM backend modules with PHP/MySQL, business rules, relational
data structures and REST API integrations.
• Designed a GPS-based field-visit verification workflow with configurable location tolerance,
browser geolocation fallback, route visualization and error diagnostics.
• Worked on an LLM/MCP integration for CRM with role-based tool restrictions, per-user
limits, session and token handling, and JSON Schema output validation.
• Integrated external services and automated CRM workflows; investigated requirements,
reviewed code and resolved application issues.
• Supported deployments and releases while coordinating backend changes with responsive
CRM interfaces and client requirements.

EDUCATION

2020 – Jun 2024 B.Sc. Computer Engineering, Chernihiv Polytechnic National University
• Graduated with Honours; Computer Systems of Artificial Intelligence programme.

SKILLS

Commercial Backend PHP • SuiteCRM • JavaScript • MySQL • SQL • REST APIs • Business Logic

Node.js & Data Node.js • NestJS • TypeScript • TypeORM • Next.js BFF • WebSocket

Tools & Testing Git • Docker • Linux/WSL • Jest • Supertest • Playwright • MCP

BACKEND PROJECTS

2026 – Present Koshta – Personal Finance Application
NestJS, Node.js, TypeScript, MySQL, TypeORM, Next.js BFF, Docker; personal project.
• Designed a modular backend with NestJS API modules, MySQL entities and shared
TypeScript types; connected it to a Next.js web/BFF application.
• Developed transaction and account workflows; worked on recurring payments, subscriptions
and rules, with Jest/Supertest tests and AI-assisted code review.

2026 – Present Dev Control – MCP Engineering Toolkit
Node.js, TypeScript, MCP, Git, OverlayFS; personal engineering project.
• Built tools for controlled file and terminal operations, command policies, Git worktrees and
isolated development workspaces.
• Integrated task tracking and external MCP services; designed access restrictions and review
steps for AI-assisted changes.

ADDITIONAL ENGINEERING PROJECTS

2024 Multiplayer Monopoly
Node.js, WebSocket, Angular; university graduation project.
• Developed real-time game events and synchronization of players, turns and shared game state.

2023 Cleaning Company Website
Node.js, JavaScript, MongoDB; academic/personal project.
• Developed website functionality with service inquiry forms, a price calculator and backend
data storage.

Earlier Real-Time Multiplayer Game (Agar.io-style)
Node.js, WebSocket; personal project.
• Implemented real-time player movement, session interactions and multiplayer state
synchronization.

LANGUAGES

Ukrainian Native speaker English A2