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Vasyl Molnar
Full-Stack JavaScript Developer
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Mukachevo, Ukraine | Linkedin | Telegram

Summary

Full-Stack JavaScript Developer with 3+ years of commercial frontend experience delivering production-grade B2B SaaS platforms, E-
commerce, EdTech, HealthTech, and compliance management systems using React and Next.js. Hands-on experience developing full-
stack features with Node.js and Express.js — including REST APIs and real-time communication via WebRTC and Socket.IO. Ready to
bring both front-end depth and full-stack versatility to a product-focused engineering team.

Skills

Frontend: React, Next.js, TypeScript, JavaScript, Redux, Redux Toolkit, TanStack Query, React Hook Form, Formik, Zustand, HTML5,
CSS3, SCSS, Tailwind CSS, Material UI, Shadcn, Storybook, Emotion, i18next, Webpack, Vite
Backend: Node.js, Express.js, NestJS, Strapi, Prisma, GraphQL, Apollo Server, REST API, WebSocket, Socket.io, WebRTC, JWT, OAuth,
Microservices Architecture, MongoDB, PostgreSQL, Redis
Tools: Git, GitHub, Docker, CI/CD, Jira, Postman, Hoppscotch, Figma, React DevTools, Jest, Cypress, ESLint, Claude, GitHub Copilot

Experience

Frontend Developer | U.Stork Lab Mar 2025 - May 2026 | Remote

Contributed to multiple production-grade platforms across B2B SaaS, E-commerce, EdTech, HealthTech and compliance management
domains, delivering scalable frontend solutions with real business impact:
• Delivered end-to-end features audit management, risk tracking, scheduling, and document control interfaces for a
compliance platform, using role-based access control and complex multi-step forms to digitize business-critical workflows
• Built product catalog, checkout, and payment-flow for a digital commerce module, including transaction history and admin-
side sales analytics with real-time charts (B2B SaaS)
• Developed KPI dashboards, SLA compliance tracking, status tracking and time-based reporting modules with real-time chart
rendering, used daily by business teams for performance monitoring and decision-making
• Architected scalable reusable component libraries with Next.js and Storybook, delivered across 10+ production modules,
ensuring UI consistency and accelerating feature delivery (EdTech and HealthTech)
• Extended the same component-driven architecture and performance optimization practices to additional client projects
across EdTech and HealthTech domains, adapting the approach to diverse business requirements
• Optimized frontend performance via memoization, virtualization, code splitting, and lazy loading, reducing data load times
and render latency by 40% under real-world production load
• Implemented SSR/ISR with Next.js, improving page render speed by 30-35% for data-heavy dashboards and reports
• Built advanced data tables with filtering, sorting, pagination, and real-time updates, reducing large dataset filtering time by
15-20% across high-load internal systems
Frontend Developer | Sigma Software Jul 2023 - Dec 2024 | Remote
Contributed as a frontend developer on a client-facing product within a professional engineering team, delivering production-ready
features using React and Next.js:
• Developed and maintained reusable React component libraries integrated with Next.js SSR/ISR, ensuring UI consistency and
accelerating feature delivery across multiple CRM modules
• Optimized frontend performance via lazy loading, code splitting, and React Query cache optimization, reducing redundant
API calls and improving initial load times
• Reduced critical production bugs by 15% through systematic edge-case testing and code review practices, improving release
stability for the client-facing CRM product
• Applied frontend security best practices — input sanitization to prevent XSS, secure token-based API communication, and
role-based UI rendering — to protect sensitive CRM client data from unauthorized access
 • Integrated REST APIs across user management, reporting, and operational workflow modules in collaboration with backend
engineers
• Resolved complex UI bugs and edge cases in a live production environment, maintaining stability and consistent user
experience across core product areas
• Participated in feature delivery, code reviews, and agile development workflows within a cross-functional engineering team

Projects

MeetLink | Frontend / Backend Full-Stack Real-Time Communication Platform
• Architected a full-stack real-time communication platform covering P2P video calls, group conferences, instant messaging,
friend management, and user profiles — built as separate frontend and backend services with clearly defined API contracts
• Implemented WebRTC-based video communication using PeerJS with STUN/TURN server configuration, handling NAT
traversal, stream negotiation, and reconnection logic for unstable network conditions
• Built a real-time event layer with Socket.IO managing bidirectional communication for signaling, live messaging, presence
tracking, and conference state across concurrent users
• Developed a RESTful backend in Node.js and Express.js with TypeScript, structured around MVC-style separation dedicated
layers for controllers, middleware, models, routes, and socket handlers
• Integrated JWT-based authentication with token decoding on the client, Formik and Yup for form validation, and Axios for
typed API communication
• Frontend built with React, TypeScript, Redux Toolkit for global state, Material UI, custom SCSS, and React Router for
navigation across messaging, conference, and profile modules
• Tech: React, TypeScript, Redux Toolkit, Node.js, Express.js, MongoDB, WebRTC, PeerJS, Socket.IO, MUI, SCSS
TravelAgency | Frontend / Backend Full-Stack Booking Platform
• Built a full-stack travel booking platform for flights and hotels with user authentication, booking management, and an admin
dashboard deployed as separate client and server applications
• Implemented JWT-based authentication with access and refresh token rotation, httpOnly cookie handling, and protected
route middleware on the backend
• Developed a REST Node.js and Express.js backend following MVC architecture dedicated layers for controllers, middleware,
models, and routers, with MongoDB for data persistence
• Built the frontend with React, Redux Toolkit, and SCSS, integrating Husky and lint-staged for pre-commit code quality
enforcement
• Tech: React, TypeScript, Redux Toolkit, Node.js, Express.js, MongoDB, MUI

Education

Uzhhorod National University
Master’s Degree, Computer Software Engineering Sep 2024 - Dec 2025
Bachelor’s Degree, Computer Software Engineering Sep 2020 - May 2024

Languages

English - B2 | Ukrainian - Native