Олексій

Oleksii Yegupov
Senior Fullstack Engineer (Node.js / React / TypeScript) / AI-assisted Engineer

Residence: Ukraine, Kropyvnytskyi
[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
https://github.com/AlexYegupov
https://stackoverflow.com/users/1948511

Summary
Full Stack Engineer with 10+ years building production web applications across React, Node.js,
TypeScript, REST APIs, microservices, and PostgreSQL/MySQL/MongoDB. Hands experince in
fintech, accounting, educational, medical and automotive projects. Agentic AI-assisted development
workflows. I care about clean architecture, maintainable code, and engineering culture — not just
shipping features.

Skills
● Languages: TypeScript, JavaScript, Python, SQL, HTML, CSS
● Frontend: React, Next.js, React Router (Remix)
● Backend: Node.js, Nest.js, Prisma, Express, Hono, REST APIs, GraphQL, microservices.
● Databases: PostgreSQL, MySQL, MongoDB, Redis, Firebase, SQLite.
● DevOps/Tooling: Docker, Cloudflare, AWS, GitLab CI/CD, Github Actions
● Build & Tooling: Vite, Npm, Pnpm, Bash
● Testing & QA: Jest, VItest, React testing library, Karma/Jasmine.
● Architecture: serverless, system design, data modeling, database schema optimization,
monorepo, unit testing, integration testing.
● Collaboration: Agile, Scrum, mentoring.
● AI tooling: AI-assisted agentic development, LLM tooling, prompt engineering, Cursor, Claude
code, MCP servers.

Leadership & Mentoring
● Mentored developers through code reviews, technical guidance, and knowledge sharing.
● Helped define coding standards and engineering best practices.
● Supported onboarding, interviews, and growth plans for team members.

Experience
WTT Solutions – Senior FullStack Engineer & Frontend Architecture Mentor (React, Next, Nest)
Apr 2022 – Present | Remote

● Contributed to delivery for Visboo, Untapped Global, Complify, and Urecruits.
● Improved team productivity by 30% through AI-assisted development workflows and modern
tooling.
● Reduced deployment times by 40% by introducing modern development practices and tooling.
● Delivered growth plans for 8+ developers and supported 2 internal promotions.
● Led technical interviews, code reviews, and engineering standards across multiple teams.

MyUnisoft – Senior Javascript Developer (React, Next.js, Node.js)
Sep 2019 – Jan 2022 | Remote

● Delivered 10+ major features (real-time dashboards, multi-currency) using microservices to
ensure high availability and faster time-to-market. Performed data modeling and database
schema optimization.
● Designed system architecture and data modeling for client projects using PostgreSQL (AWS
RDS)
● Developed complex React components for MyUnisoft.fr, serving 10,000+ French commercial
clients.
● Architected REST API structure and collaborated with backend teams on data flow and system
performance. Used Nest.js for building maintainable server-side logic.
● Conducted code reviews to align delivery with business requirements and technical standards.

Individual Contract Projects – Full-Stack JavaScript Developer (React, Node.js)
Mar 2017 – Aug 2019 | Remote

● Launched 4 major projects, including Getnexar.com, Tailwise.com, CryptoCalc, and Cactuo.com.
● Improved application load times by 50% through code splitting and bundle optimization.
● Built web applications using React, Node.js, and modern build tooling. Used PostgreSQL and
MySQL for the data modeling.
● Implemented third-party integrations and external data processing systems.

Dev-Pro – Full-Stack Developer (Python, Javascript)
Jun 2012 – Dec 2016 | Kharkiv

● Built and deployed click-to-chat widget systems for Alive5.com, supporting 100+ websites with
99.9% uptime.
● Created a beauty e-commerce platform with advanced filtering and recommendation features.
● Built synonym/antonym dictionary systems handling 50,000+ word relationships.
● Developed desktop chat applications using Python, JavaScript, and Qt.

(Additional earlier experience available upon request)

Notable Projects
MyUnisoft.fr — Accounting Service
Universal accounting tool for French commercial companies with React frontend and comprehensive
REST API

Untapped Global — Investment Platform
Data-driven investing platform for emerging markets with advanced analytics and reporting

MoxFive.com — Security & Incident Response Platform
Cybersecurity and technical advisory platform that helps organizations respond to cyber incidents,
improve resilience, and manage security‑related projects with transparency and expert‑led guidance.

Visbo.de — Project Management System
Advanced project management platform with real-time collaboration features

Getnexar.com — AI Driver Assistance
Automotive safety platform with real-time data processing and machine learning integration

Alive5.com — Digital Marketing Platform
Comprehensive digital marketing and web development platform with advanced analytics and client
management features

Education
National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
Master’s degree equivalent (Specialist), Computer Science / Systems Engineering
1998 – 2004

Languages
● Ukrainian: Native
● English: B2 – Professional Working Proficiency

Work Preferences
● Not available for a mobile development.
● Prefer environments that do not require Mac or Windows OS usage
● Not considering projects connected to Russia