Experience and education

11+ years in tech. FinTech, HighLoad, $1.5M+ processed volume. Long-term retainers: NDA fintech Mini App (2025-2026), Visiting Media (2022-2025), Upwork (2017-present), and a Master's in Computer Sciences from the University of State Fiscal Service of Ukraine.

Experience

  1. Upwork

    Jun 2017 - Present

    Senior Full Stack Developer

    Freelance · Ukraine

    • Backend Power: Node.js, NestJS, Python, PHP/Laravel, GraphQL, REST APIs, Prisma ORM, Supabase, MySQL, PostgreSQL, microservices - robust, scalable, high-performance architecture
    • AI & RAG Engineering: OpenAI API, Anthropic, LLM integrations, Embeddings, PostgreSQL/pgvector, Vector Databases, LangChain, LlamaIndex, Vercel AI SDK, RAG pipelines, semantic & vector search, AI Agents, AI chatbots, AI assistants, knowledge bases, document Q&A, AI-driven automation, Text-to-Speech (StyleTTS2), audiobook generation
    • Frontend: React.js, Next.js, React Native, TypeScript, Tailwind, MUI, Alpine.js, React Query, Zustand, Redux Toolkit, performance optimization, Jest, Cypress, Vitest
    • Web Scraping & Automation: Playwright, Puppeteer, Chrome Extension development
    • MERN Stack: MongoDB, PostgreSQL, Express.js, React.js, Node.js - full-stack applications with seamless integration
    • Cloud, CI/CD & DevOps: AWS, Docker, GitHub Actions, GitLab CI/CD, Vercel, Netlify, Vite, Webpack - smooth delivery, deployment, and scaling
    • Any Product Type: SaaS platforms, Startup MVPs, AI apps, dashboards, admin panels, CRMs, ERPs, marketplaces, e-commerce platforms, FinTech, EdTech, HealthTech, HRTech, booking systems, CMS, POS systems, payment platforms, analytics platforms, social platforms, mobile apps, browser extensions, DeFi, GameFi, and custom web applications
    • MVPs That Scale: From raw idea → production-ready product with polished UX + rock-solid technical foundation
    • Web3: Ethers.js, Web3.js, Crossmint (minting, payments, wallet flows), blockchain infrastructure integrations (Blockradar, Nexus)
    Next.jsReactNode.jsNestJSPythonAIRAGWeb3
  2. NDA

    Aug 2025 - Sep 2026

    Senior Software Engineer

    Part-time · Remote

    • FinTech / HighLoad: Web & Telegram Mini App. $1.5M+ processed volume.
    • My most technically complex project, which I built entirely on my own and have been actively developing over the past year. It is a HighLoad platform that allows users to purchase virtual/physical cards using a FinTech Web App.
    • The architecture consists of three main parts:
    • Frontend: Next.js
    • Backend: Node.js + Express + MongoDB
    • Admin Panel: Next.js
    • TypeScript is used end-to-end across the entire stack
    • Testing: Playwright
    Next.jsNode.jsExpressMongoDBTypeScriptPlaywright
  3. Visiting Media

    Jul 2022 - Aug 2025

    Senior Full Stack Developer

    Full-time · Remote

    • React.js
    • Next.js
    • Storybook
    • Jest / Vitest
    • AWS
    • Docker
    • JavaScript
    • MUI / TailwindCss
    ReactNext.jsStorybookJestAWSDocker
  4. ETNA Network

    Jan 2021 - May 2022

    Senior Frontend Developer

    Part-time

    • Vanilla JS
    • Alpine.js
    • Node.js
    • Scss + TailwindCss
    Alpine.jsJavaScriptNode.jsTailwindSCSS
  5. Siteplus Pte Ltd

    Jan 2020 - Jul 2021

    Team Lead Frontend Developer

    Kyiv Metropolitan Area

    • Vanilla JS(ES5/ES6+)
    • React.JS
    • Mobx
    • JSON, AJAX, API
    • Node.js (basic)
    • SASS / LESS (mixins)
    ReactMobXLeadershipSASS
  6. Siteplus Pte Ltd

    Dec 2018 - Jan 2020

    Frontend Developer

    Kyiv, Ukraine

    ReactJavaScriptMobXSASS
  7. LexStatus

    May 2018 - Dec 2018

    Junior Front-End Developer

    Kyiv, Ukraine

    • Creation of sites
    • Assistance in maintaining all of sites in this company
    • Creation of landings according to the prepared layout
    HTMLJavaScriptCSS
  8. SDG Trade

    Oct 2017 - Dec 2018

    Web Developer

    Kyiv, Ukraine

    • Creating a landing page
    • Revision of the existing site
    • Work with existing forms of crm getcourse, their refinement to customer needs, introduction of new ones
    • Use HTML5, Pug, Gulp, Bootstrap 4, JS, CSS
    HTML5PugGulpJavaScriptBootstrap
  9. USFSU

    Oct 2013 - May 2017

    Specialist of the 2nd category (system administrator)

    Ukraine

    • Network administration
    • Maintenance, repair and modernization of computer equipment
    • Maintenance of office equipment
    • Installation of the local network
    • Windows XP / 2003/7 / 2008R2 / 10
    • User support
    WindowsNetworkingOps

Education

  1. Master of Computer Sciences

    University of State Fiscal Service of Ukraine

    2013 - 2019

    • - Computer sciences

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