Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Full Stack Developer with 5+ years building web and mobile products for startups and scaling companies. I work across the stack with React/Next.js on the frontend and Node.js/Express on the backend, using AI-assisted tools daily to move faster and ship cleaner. I’ve delivered SaaS platforms, marketplaces, and mobile apps across sports tech, e-commerce, health tech, and ed-tech—engineering real-time experiences, adaptive user flows, and data-driven dashboards while collaborating closely with product and engineering teams.…Full Stack Developer with 5+ years building web and mobile products for startups and scaling companies. I work across the stack with React/Next.js on the frontend and Node.js/Express on the backend, using AI-assisted tools daily to move faster and ship cleaner. I’ve delivered SaaS platforms, marketplaces, and mobile apps across sports tech, e-commerce, health tech, and ed-tech—engineering real-time experiences, adaptive user flows, and data-driven dashboards while collaborating closely with product and engineering teams.

Marichka Tanechnyk

Full Stack Developer, Web Developer, Front-End Developer, +2





Full Stack Developer with 5+ years building web and mobile products for startups and scaling companies. I work across the stack with React/Next.js on the frontend and Node.js/Express on the backend, using AI-assisted tools daily to move faster and ship cleaner. I’ve delivered SaaS platforms, marketplaces, and mobile apps across sports tech, e-commerce, health tech, and ed-tech—engineering real-time experiences, adaptive user flows, and data-driven dashboards while collaborating closely with product and engineering teams.…Full Stack Developer with 5+ years building web and mobile products for startups and scaling companies. I work across the stack with React/Next.js on the frontend and Node.js/Express on the backend, using AI-assisted tools daily to move faster and ship cleaner. I’ve delivered SaaS platforms, marketplaces, and mobile apps across sports tech, e-commerce, health tech, and ed-tech—engineering real-time experiences, adaptive user flows, and data-driven dashboards while collaborating closely with product and engineering teams.

Available to hire

Full Stack Developer with 5+ years building web and mobile products for startups and scaling companies. I work across the stack with React/Next.js on the frontend and Node.js/Express on the backend, using AI-assisted tools daily to move faster and ship cleaner.

I’ve delivered SaaS platforms, marketplaces, and mobile apps across sports tech, e-commerce, health tech, and ed-tech—engineering real-time experiences, adaptive user flows, and data-driven dashboards while collaborating closely with product and engineering teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Language

English

Advanced

Ukrainian

Fluent

Work Experience

Full Stack Developer at VISO Software

April 1, 2023 - Present

Remote role delivering a Fantasy Football Manager — a sports tech web and mobile platform where fans manage teams, make transfers, and compete in weekly leagues. Implemented real-time match event streaming via WebSockets, with live leaderboards updating based on actual performance and prize rewards for top managers.

Frontend Developer at MyPlanet Design

April 1, 2022 - April 1, 2023

Remote role on a Personalized Skincare Platform (app.breakoutlab.co) developing a health-tech web app with interactive dashboards showing skin vitality scores, hormonal metrics, and treatment timelines. Built a custom recommendation engine linking diagnostic results to product suggestions and direct e-commerce purchasing. Contributed to LifeStylle marketing & e-commerce workflows and a marketplace for cleaners, including multi-step checkout and partner referrals.

Freelance Frontend Developer at Freelance (Multiple products: LifeStylle & Marketplace for Cleaners)

June 1, 2021 - April 1, 2022

Worked on a marketing & e-commerce platform (LifeStylle) including referral/rewards flows with complex user journeys. Built marketplace functionality for connecting clients with verified cleaners, including booking/appointment management and cleaner workload/job booking workflows.

Freelance Frontend Developer at Independent (Fiverr & Upwork)

June 1, 2021 - April 1, 2022

Delivered and owned full-stack features across multiple live products for startup and client teams, spanning React/React Native UI and Node/Express APIs. Implemented real-time match event tracking using WebSockets (live scores, player actions, dynamic leaderboards). Built/owned features for a voice-first speech practice app for children (adaptive flows, sensory-friendly UI, parent dashboard with PDF progress export). Created complex multi-step e-commerce customization and ordering flows with robust state management across checkout. Integrated AI-assisted development tools (Claude Code) into daily workflow for scaffolding/refactoring/review, reducing delivery time while maintaining code quality. Built responsive UIs and reusable component libraries aligned to design systems.

Frontend Developer at Independent (Fiverr & Upwork)

June 1, 2021 - April 1, 2022

Freelance projects spanning e-commerce, healthcare, sports tech, and ed-tech. Delivered full-stack features: React/React Native interfaces and Node.js/Express APIs; implemented real-time match event tracking with WebSockets; designed a voice-first speech practice app for children (2–8 years, including neurodivergent users) with adaptive flows and a parent dashboard delivering exportable PDF progress reports; built multi-step product customization and ordering flows; integrated Claude Code into daily workflow to accelerate feature delivery; created reusable UI components and design-system-aligned libraries; collaborated with product managers and backend engineers to ship features.