Oleksandr

Full stack software engineer

Employment type:
full-time
Age:
35 years
City of residence:
Zaporizhzhia
Ready to work:
Remote

Contact information

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Work experience

Full stack developer

from 07.2021 to now (5 years 4 months)
Leetio, Дистанційно (IT)

Full Stack Developer.

Full Stack Developer (Frontend-focused)

Stack: React 18, React Native (Expo), TypeScript, Next.js, Node.js/Express, NestJS, Prisma, PostgreSQL, MongoDB, Redis, Redux Toolkit, Zustand, TanStack Query

- Built and maintained web and mobile applications (React, React Native) for travel, fintech, Web3, healthcare and streaming products, including a multi-brand / white-label architecture serving 11+ brands from a single codebase via a custom Vite resolver.
- Built native iOS/Android applications from scratch, owning architecture, navigation, state management and backend API integration.
- Developed full-stack features end-to-end: designed Node.js/Express and NestJS backends, modeled data in MongoDB and PostgreSQL (Prisma), and built REST APIs consumed by web and mobile clients.
- Implemented Web3 wallet authentication (Wagmi + viem, MetaMask / EVM wallets) and payment flows (Stripe, PayByrd); integrated Sentry for error tracking and performance monitoring.
- Set up an automated localization pipeline (Tolgee) that syncs translations between the frontend and the translators' platform, removing manual key management and cutting release time for new languages.
- Authored unit and integration test suites (Jest), achieving full coverage on critical component libraries and validating WCAG 2.0 accessibility compliance for large-scale platforms.

AI EXPERIENCE

- Use AI-assisted development as part of the daily workflow (Cursor, Claude Code, GitHub Copilot): code generation, refactoring, writing tests, and code review.
- Set up MCP servers to connect the AI assistant to project context and development tools, speeding up onboarding into unfamiliar parts of the codebase.

Front-end Developer (Freelance)

from 07.2019 to 06.2021 (2 years)
Freelance Web Studio, Дистанційно (IT)

Built and maintained JavaScript/React-based interfaces according to client requirements.
Worked independently across the full project lifecycle, from requirements gathering to delivery.
Provided ongoing support and iterative improvements for existing client applications.

Education

Запорізька державна інженерна академія

Електронні системи, Запоріжжя
Higher, from 2008 to 2013 (5 years)

Additional education and certificates

2019, 1 year

Language proficiencies

  • English — above average
  • Ukrainian — fluent

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