⭐️⭐️⭐️⭐️⭐️ Top Rate Full-Stack & AI Developer⭐️⭐️⭐️⭐️⭐️ I am a Full-Stack Engineer with 5+ years of experience across Fintech, E-commerce, Maritime, and Web3. I build custom software from scratch and integrate AI and automation into core business workflows — from rapid MVPs and stylish landing pages to complex, high-load enterprise platforms. My expertise spans applied AI (multi-agent systems, RAG, LangChain), high-throughput APIs, trading algorithms, and intuitive UI/UX design. A strong QA background ensures rock-solid deployments, while my growth-marketing experience aligns system logic directly with business ROI, cutting client manual work by up to 60%. Stack-agnostic, fast-adapting, and always evolving.…

Vladyslav Oliinyk

Twine
PRO

⭐️⭐️⭐️⭐️⭐️ Top Rate Full-Stack & AI Developer⭐️⭐️⭐️⭐️⭐️ I am a Full-Stack Engineer with 5+ years of experience across Fintech, E-commerce, Maritime, and Web3. I build custom software from scratch and integrate AI and automation into core business workflows — from rapid MVPs and stylish landing pages to complex, high-load enterprise platforms. My expertise spans applied AI (multi-agent systems, RAG, LangChain), high-throughput APIs, trading algorithms, and intuitive UI/UX design. A strong QA background ensures rock-solid deployments, while my growth-marketing experience aligns system logic directly with business ROI, cutting client manual work by up to 60%. Stack-agnostic, fast-adapting, and always evolving.…

Available to hire

⭐️⭐️⭐️⭐️⭐️ Top Rate Full-Stack & AI Developer⭐️⭐️⭐️⭐️⭐️
I am a Full-Stack Engineer with 5+ years of experience across Fintech, E-commerce, Maritime, and Web3. I build
custom software from scratch and integrate AI and automation into core business workflows — from rapid MVPs
and stylish landing pages to complex, high-load enterprise platforms. My expertise spans applied AI (multi-agent
systems, RAG, LangChain), high-throughput APIs, trading algorithms, and intuitive UI/UX design. A strong QA
background ensures rock-solid deployments, while my growth-marketing experience aligns system logic directly
with business ROI, cutting client manual work by up to 60%. Stack-agnostic, fast-adapting, and always evolving.

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Skills

Experience Level

ChatGPT
Expert
UI
Expert
TypeScript
Expert
Tailwind
Expert
React JS
Expert
PostgreSQL
Expert
Node.js
Expert
Github
Expert
Python
Expert
API
Expert
Solidity
Expert
Ethereum
Expert
Vue.js
Expert
Large Language Model
Expert
Docker
Expert
Go
Expert
Prompt Engineering
Expert
Rust
Expert
Web Design
Expert
SQLite
Expert
Web3
Expert
Llama
Expert
SEO
Intermediate
Selenium
Intermediate
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Language

Ukrainian
Fluent
Russian
Fluent
English
Advanced
Czech
Beginner

Work Experience

Full-Stack & Applied AI Engineer (Freelance platforms & private clients)
January 1, 2023 - Present
Engineered 20+ custom software and automation solutions end-to-end for Fintech, Maritime, and Web3 clients. Architected an on-premise maritime OCR + RAG system (PaddleOCR, local vector embeddings) enabling intelligent document search while keeping sensitive vessel data strictly on-premise and air-gapped. Designed clean responsive UIs and internal operational dashboards using React and Tailwind CSS, emphasizing intuitive user flows and fast load times.
QA Automation & Integration Engineer (Fintech Startup)
January 1, 2021 - January 1, 2023
Built and maintained 100+ automated Playwright E2E tests covering revenue-critical flows: onboarding, KYC verification, multi-currency payment gateways, and referral systems. Integrated test suites into CI/CD to enforce zero-regression release cycles. Implemented automated verification for analytics events, redirects, and attribution tracking to prevent silent tracking/data leakage issues.
Quant & Trading Systems Engineer at First Stage Labs
January 1, 2020 - January 1, 2021
Developed low-latency algorithmic trading bots, crypto market screeners, and price aggregators processing high-frequency live data from multiple exchanges. Engineered high-performance Rust and Go data normalization microservices for 10–20x throughput gains in hot-path market data ingestion. Maintained distributed monitoring, token tracking pipelines, and node rotation infrastructure across 50+ cloud instances.
Web & Automation Developer at PingPartners
January 1, 2018 - January 1, 2020
Delivered custom CRUD web applications, interactive client dashboards, and admin panels for e-commerce and traffic arbitrage teams, handling both backend logic and frontend UI/UX. Built automated web scrapers and page monitoring tools using Puppeteer and Python to eliminate repetitive manual competitor and pricing research.

Education

Bachelor's in Business Informatics at HSE University
January 1, 2019 - January 1, 2024
PHP, Frontend & Web Frameworks at Hillel IT School
January 1, 2017 - January 1, 2019
Computer Science (System Administration) at Server-College Odessa
January 1, 2015 - January 1, 2017

Qualifications

Add your qualifications or awards here.

Industry Experience

Financial Services, Software & Internet, Transportation & Logistics, Other
    Full-Stack Developer
    Developed and maintained modern full-stack web applications using Next.js, React, TypeScript, and Node.js, with a strong focus on performance, scalability, and responsive user experiences. ⚡️ Built production-ready web applications and interactive interfaces using Next.js, React, and TypeScript. ⚡️ Developed dynamic 3D and interactive web experiences with Three.js, integrating 3D models, animations, camera controls, and interactive scenes into web applications. ⚡️ Designed and implemented responsive, pixel-accurate interfaces optimized for desktop, tablet, and mobile devices. ⚡️ Developed reusable frontend components and scalable application architectures using React and Next.js. ⚡️ Integrated REST APIs and backend services, handling data fetching, authentication, business logic, and application state. ⚡️ Optimized application performance, including rendering efficiency, page load speed, and 3D scene performance. ⚡️ Collaborated across the full development lifecycle, from UI implementation and frontend architecture to backend integration, testing, deployment, and maintenance. ⚡️ Worked with modern development tools and Git-based workflows to deliver maintainable, production-ready software.…
    Front-End Developer
    Developed a modern, responsive landing page using React.js, Vite, and Tailwind CSS, focusing on clean UI implementation, responsive layouts, and smooth user interactions. ⚡️ Built reusable and modular UI components using React.js. ⚡️ Developed the project with Vite for a fast and efficient development experience. ⚡️ Implemented responsive layouts and modern styling using Tailwind CSS. ⚡️ Translated UI designs into pixel-accurate, responsive web interfaces. ⚡️ Optimized the landing page for different screen sizes and devices. ⚡️ Implemented interactive elements and smooth user experiences using React. ⚡️ Structured the frontend codebase for maintainability, scalability, and easy component reuse.…
    Shopify Developer
    Worked as a Shopify Developer, customizing Shopify stores, developing responsive storefronts, integrating features, and optimizing e-commerce experiences for performance and usability.…