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IVAN STUPAK
FRONTEND DEVELOPER, 5+ YEARS EXPERIENCE
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | LinkedIn | Github | GMT+2

Frontend developer with 5 years of commercial experience, working in teams from 2 to 30 members, both
remotely and on-site. I own features end-to-end, from clarifying requirements to a smooth release. I focus on
business impact: faster page loads, clearer navigation, and more intuitive user journeys. I've created a reusable
component system to keep the product consistent and speed up delivery. I've shipped multi-platform products on
web and mobile (iOS/Android), including offline-first experiences that keep working without connectivity, and
I've launched multilingual interfaces for different markets.
I'm passionate about AI-augmented development and actively integrate AI into my everyday engineering
workflow. I use AI to accelerate research, problem-solving, debugging, refactoring, and documentation,
allowing me to move faster without compromising code quality. I continuously explore new AI-powered tools
and approaches to make development more efficient, maintainable, and reliable, while also sharing knowledge
and best practices with the team.
Frontend: TypeScript, React, Next.js, Vue.js, Nuxt, Redux, Apollo Client, React Native, Tailwind CSS, Vite
Backend: Node.js, NestJS, GraphQL, REST APIs, PostgreSQL, Redis
Other: Jest, Playwright, Cypress, Sentry, Figma, GCP, Docker, Kubernetes, CI/CD (Github Actions)

Frontend Javascript Developer, Nitra Ltd. (Consulting/Outsourcing)
Dec 2022 - Present (4 years)
● Integrated AI-assisted development (Cursor/Claude/Codex) into the engineering workflow, introducing
structured prompting, code review, and testing practices that improved delivery speed by ~26%.
● Shipped multi-platform products (web + iOS/Android) with offline-first experience so users stayed
productive with poor connectivity.
● Improved page load and interaction speed (asset hygiene, code splitting); key pages' LCP dropped by
~34%.
● Launched multilingual interfaces for multiple markets with consistent tone and formatting.
● Modularized large applications into feature-based packages, cutting onboarding time and PR size.
● Mentored teammates, led reviews, and coordinated with product/design to align on acceptance criteria
and timelines.

Frontend Javascript Developer, Devlight (Mobile app development/Outsourcing)
Jan 2022 - Jan 2023 (1.1 years)
● Improved key user flows in a fuel station mobile app, reducing average time to complete common
actions by ~1.5 minutes through UX and frontend optimizations.
● Reduced average screen load time by ~30% by optimizing API requests, rendering, and frontend logic
across mobile applications.
● Delivered customer-facing features for a postal service mobile app, including parcel tracking and
shipment management across iOS and Android.
● Worked closely with backend, QA, and design teams to define requirements, prevent regressions, and
ship reliable mobile releases.

Bachelor of Computer Science — NTUU Igor Sikorsky Kyiv Polytechnic Institute