Oleksii

Fullstack Developer

Age: 25 years

City of residence: Kharkiv

Ready to work: Lviv, Remote

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Oleksii Semenov
Software engineer
(look above in the "contact info" section)
telegram: @boringLi (look above in the "contact info" section)

About me
Full-stack engineer with 1.5+ years of commercial experience working in
international teams and a Bachelor's degree in Computer Science: Software
Engineering. 
Experienced in fixing bugs, maintaining and supporting existing projects, and
developing new features to enhance performance and functionality.

Working experience
Auction Software, Inc | 07/2024 - 12/2025

Full-Stack Engineer | USA, Remote

A U.S. – based product company providing SaaS and white-label auction
platforms for e-commerce, logistics, retail, and liquidation businesses.
B uilt core platform features including real-time bidding, Buy-Now flows,
shipping logic, payouts, and admin tools.
D eveloped backend services using Node.js, Express, MySQL, and Redis,
contributing to a large monolithic codebase used by enterprise clients.
Implemented integrations with Stripe, shipping APIs, and external
inventory/analytics services.
Implemented frontend modules with React.js: forms, inventory /product
pages, shipping label tools, and role-based admin UIs.
A dded real-time communication features via WebSockets/WebRTC for
live bidding and synchronized updates.

NIX Solutions | 09/2023 – 02/2024 | Ukraine, Remote

Trainee software engineer

NIX Solutions trainee camp helped me deepen my skills in JavaScript/
TypeScript, Node.js and React, and gain practical experience with backend
architecture, databases and scalable services. It also strengthened my
teamwork and SCRUM practices through participation in real projects and
code reviews.
Education
Kharkiv National University of Radio Electronics | 2018-2022
Bachelor's Degree in Computer Science, Software Engineering

Skills
Backend: Node.js, Nest.js, Express, PostgreSQL, MongoDB, Redis, PrimsaORM,
TypeORM, Swagger

Frontend: React, Next.js, Shadcn/ui, Tailwind CSS, SASS, Vite, MUI, React Hook
Form

State Management: Zustand, RTK Query, Context API, Redux/Toolkit

Tests: Jest unit testing, Cypress (E2E)

Overall: AWS S3, OOP/SOLID, REST, WebSockets, JWT, RBAC, Webhooks,
Docker, ESLint/Prettier, CI/CD, Responsive/Adaptive design

Oleksii

Fullstack Developer

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