Андрій Червоняк

I combine TypeScript, React & clean architecture.

About me
About me

From algorithms to interfaces — my journey building high-performance web applications.

Strong Computer Science foundation.

I earned my Bachelor's degree in Computer Science from the National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" in June 2024, graduating with high distinction (GPA: 92/100).

My technical journey began with low-level programming in C and algorithmic problem-solving in Python, providing me with a deep understanding of computational thinking and software architecture principles that I now apply to frontend engineering challenges.

My photo

From algorithms to interfaces — my journey building high-performance web applications.

Strong Computer Science foundation.

I earned my Bachelor's degree in Computer Science from the National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" in June 2024, graduating with high distinction (GPA: 92/100).

My technical journey began with low-level programming in C and algorithmic problem-solving in Python, providing me with a deep understanding of computational thinking and software architecture principles that I now apply to frontend engineering challenges.

Corporative event in Genesis

Mastering modern frontend ecosystem.

My technical expertise spans the entire modern JavaScript ecosystem. I've built enterprise-level applications using TypeScript for type safety, implemented complex state management with Redux and Zustand, and delivered server-side rendered applications with Next.js for optimal SEO and performance.

At Soft Generation, I expanded into cross-platform development with React Native, managing the complete mobile development lifecycle including iOS build processes and TestFlight deployments. This experience strengthened my understanding of platform-specific optimizations and native performance considerations.

The photo from my trip to Kartapy, Ukraine

Building production-ready applications.

During my second year, I joined LIDDWEB LLC as a Frontend Developer, where I architected and deployed numerous production applications. I specialized in building scalable Single Page Applications (SPAs) using React, implementing complex state management solutions, and optimizing bundle sizes with modern build tools like Gulp and Parcel.

This role taught me to balance technical excellence with business requirements, delivering performant solutions under tight deadlines while maintaining code quality and documentation standards.

The photo from my trip to Kartapy, Ukraine

Engineering with design awareness.

While my core strength lies in engineering, I've invested time understanding UI/UX principles to better collaborate with design teams and implement pixel-perfect interfaces. During my thesis development, I studied design systems and component architecture, reading resources like How to Design Better UI Components 3.0 by Adrian Kuleszo.

This dual perspective allows me to write more maintainable CSS architectures, implement responsive designs efficiently, and bridge the gap between design mockups and production code.

Me and my friends on team building.

Continuous technical advancement.

Beyond staying current with the JavaScript ecosystem, I focus on engineering practices that directly impact business outcomes:

  • Performance engineering that improves conversion rates through optimized Core Web Vitals
  • Clean code principles ensuring your team can iterate quickly without technical blockers
  • Comprehensive testing strategies preventing revenue-impacting bugs before they reach production
  • Accessibility compliance expanding your addressable market while avoiding legal risks
  • Strategic refactoring that reduces maintenance costs and accelerates feature delivery

Every line of code I write is an investment in your product's future scalability and your team's productivity.

My friend's dog called Lucky

Let's build something remarkable.

I'm passionate about solving complex technical challenges and creating seamless user experiences through clean, efficient code.

My signature.

Experience
Experience

Howly by SKELAR

Frontend Engineer

June 2025 – Present

  • Designed and implemented a new cover letter generation funnel, reducing codebase complexity by 10% and establishing architectural foundation for future product expansion
  • Designed and implemented Japanese resume generation funnel, reducing Redux complexity by 40% while maintaining full feature parity with main funnel
  • Led Japanese funnel campaign launch that exceeded company ROMI records with strong potential for further scaling
  • Influenced product architecture—team lead approved rewriting main funnel using architectural patterns established in Japanese funnel
  • Optimized PDF generation logic (core product feature), substantially improving memory and network efficiency
  • Currently architecting page splitting functionality for resumes and cover letters, breaking down epic into manageable tasks and designing scalable algorithm architecture
  • Tech Stack: TypeScript, React 19, Redux Toolkit, Next.js 15, Playwright, gRPC APIs

Soft Generation

Front-End & Mobile Developer

November 2024 – June 2025

  • Developed comprehensive web and mobile platform for condominium management with administrator and resident portals
  • Implemented real-time chat functionality using WebSocket technology
  • Built social media features enabling residents to share posts and announcements, alongside functionality for tracking bills and usage
  • Optimized navigation between screens and integrated REST APIs across platform
  • Conducted weekly demos, translating technical concepts for non-technical stakeholders
  • Tech Stack: TypeScript, React 18, React Native, Next.js 14, Zustand, Chakra UI, WebSocket, REST APIs

LIDDWEB LLC.

Front-End Developer

June 2022 – November 2024

  • Built 20+ production websites and web applications from scratch, establishing expertise in responsive design and reusable component architecture
  • Implemented responsive, mobile-first architectures using modern CSS Grid and Flexbox layouts
  • Developed reusable component libraries that accelerated development workflow and ensured consistency across projects
  • Optimized Core Web Vitals achieving 95+ Lighthouse scores across all projects through performance best practices
  • Integrated RESTful APIs and implemented interactive features using JavaScript ES6+ and React
  • Worked with modern build tools (Vite, Gulp, Parcel) to optimize asset delivery and development workflow
  • Tech Stack: JavaScript ES6+, React, SASS/SCSS, Vite, Gulp, Parcel, Bootstrap 5, Tailwind CSS, Framer Motion, RESTful APIs

Education
Education

National Technical University of Ukraine "KPI"

Master's Degree in Computer Science

September 2024 – Present

Focus: Advanced Algorithms, Distributed Systems, Machine Learning

National Technical University of Ukraine "KPI"

Bachelor's Degree in Computer Science

September 2020 – June 2024

GPA: 92/100 - Graduated with High Distinction

Thesis: "Development of Automated Testing Framework for Web Applications" - Score: 97/100

Relevant Coursework: Data Structures & Algorithms, Software Engineering, Database Systems, Computer Networks

Certifications
Certifications