Ihor Prysiazhniuk

Software Engineer

Lviv, Lviv, Ukraine5 yrs 10 mos experience

Key Highlights

5+ years of experience in full-stack development.
Expert in React and Node.js for scalable applications.
Proven track record of optimizing performance and user retention.

Stackforce AI infers this person is a Full-Stack Developer with expertise in B2C applications and scalable web/mobile solutions.

Contact

Skills

Core Skills

ReactNode.jsTypescriptReact NativeJavascript

Other Skills

Next.jsPostgreSQLMongoDBTailwind CSSREST APIsGitBootstrapExpressExpress.jsGraphQLGPT APIGoogle Maps APIJiraCSSData Structures

About

I build things that work at scale — and I've been doing it for 5+ years across web and mobile. As a Senior Full-Stack Developer, I specialize in React, React Native, Node.js, TypeScript, and Next.js — covering the full product lifecycle from architecture decisions and API design to polished, production-ready interfaces. I've worked across web platforms, cross-platform mobile apps, and full-stack systems where the front-end, back-end, and data layers need to operate as one. What I bring to a team: — Clean, maintainable code that doesn't become someone else's technical debt — Full ownership: I take features from requirements to deployment — Cross-platform expertise: single React Native codebase, production-grade on iOS and Android — Strong collaboration with designers and product managers — I translate wireframes into reality fast Tech stack: React · React Native · Node.js · TypeScript · JavaScript · Next.js · PostgreSQL · MongoDB · Tailwind CSS · Redux · REST APIs · Git I'm currently open to Senior Full-Stack, Front-End, or Mobile Developer roles — remote-first, with teams in the EU or USA.

Experience

5 yrs 10 mos

Total Experience

1 yr 11 mos

Average Tenure

Current Experience

Trionika

Senior Full-Stack Developer

Sep 2023 – Feb 2026 · 2 yrs 5 mos · Lviv, Ukraine · On-site

Architected and delivered 4 production web and mobile applications using React, React Native, and Node.js serving 15,000+ monthly active users
Designed RESTful API infrastructure with Node.js + TypeScript, reducing endpoint response time by 35% via query optimization and caching
Led TypeScript migration of legacy codebase (**40k+** lines), reducing runtime errors by an estimated 60%
Mentored 3 mid-level developers through code reviews, reducing PR defect rate by 40%
Optimized React Native app performance, improving startup time by 45% and achieving consistent 60fps rendering on Android devices
Delivered 12+ major releases in Agile sprint cycles, maintaining 95% on-time delivery rate
Tech: React, React Native, Node.js, TypeScript, Next.js, PostgreSQL, MongoDB, Tailwind CSS, REST APIs, Git

ReactReact NativeNode.jsTypeScriptNext.jsPostgreSQL+4

Self-employed

Middle Full-Stack Developer | Self-Employed

Oct 2021 – Jul 2023 · 1 yr 9 mos · Lviv, Ukraine · Remote

Built and shipped 20+ full-stack features across web and mobile products, contributing to a ~25% improvement in user retention metrics
Refactored core application modules, reducing bundle size by 38% and improving Lighthouse performance score from 61 to 89
Developed and integrated 8 third-party APIs (payment services, notification services, analytics), enabling new product capabilities with no additional infrastructure cost
Increased test coverage from 12% to 64%, reducing production bug reports by ~50%
Consistently delivered sprints on time, maintaining a 90%+ ticket completion rate in Jira over 21 months
Stack: React, React Native, Node.js, TypeScript, JavaScript, PostgreSQL, MongoDB, Tailwind CSS, Bootstrap

ReactReact NativeNode.jsTypeScriptJavaScriptPostgreSQL+3

Devtorium

Junior Full-Stack Developer

Jan 2020 – Sep 2021 · 1 yr 8 mos · Lviv · On-site

Implemented 30+ UI components in React and React Native across 6 client projects, accelerating the team's frontend delivery velocity
Built and maintained Node.js/Express backend services supporting 50+ API endpoints consumed by web and mobile clients
Resolved 120+ bugs through targeted debugging and QA collaboration, improving overall application stability
Participated in 15 production deployments, gaining hands-on experience with CI/CD pipelines and Git workflows within a team of 8 developers
Stack: React, React Native, JavaScript, TypeScript, Node.js, Express, PostgreSQL, MongoDB, Tailwind CSS

ReactReact NativeJavaScriptTypeScriptNode.jsExpress+3