Chang Chen
EXPERTISE
BIO
I'm a Senior Full-Stack Developer with 10+ years of experience building scalable web and mobile applications across AI, Web3, and SaaS domains. I specialize in React, Next.js, Node.js, TypeScript, and Python, with strong backend skills in MongoDB, PostgreSQL, and REST/GraphQL APIs. I've led projects involving AI assistants, staking dashboards, and real-time user platforms. I value clean code, performance, and collaboration, and I enjoy delivering impactful solutions in fast-paced, product-driven teams.
WORK EXPERIENCE
Senior Full-stack Developer | Remote
Lido Finance
September 2024 - April 2025
• Spearheaded the development of intuitive, high-performance web interfaces for Ethereum staking services, focusing on responsiveness, accessibility, and real-time data rendering. • Architected and implemented scalable React components using TypeScript, following atomic design principles and modular coding practices. • Engineered complex Web3 integrations in the browser to support seamless wallet connections, smart contract interactions, and live staking analytics. • Designed GraphQL queries and schema adjustments to streamline frontend data fetching, improving page load speed and reducing API overhead. • Introduced advanced state management solutions with React Context and Zustand for predictable and maintainable UI behavior. • Optimized frontend performance with code-splitting, lazy loading, and critical CSS extraction, improving Lighthouse scores across the board. • Collaborated with design and product teams to ensure pixel-perfect UI implementation, contributing to enhanced user retention and engagement. • Maintained and extended CI/CD pipelines, automated testing (unit and E2E), and code linting to enforce code quality across the frontend stack. • Coordinated with backend and DevOps teams to align API design, logging, and error handling with frontend requirements. • Tech Stack: React, TypeScript, Web3.js, Ethers.js, Node.js, GraphQL, Docker
Senior Full-stack Engineer / Tech Lead | Remote (Dubai, UAE)
Pontem Network
June 2022 - April 2024
• Managed front-end using Vue3, React, and Next.js; integrated USBHID for hardware wallets. • Led architecture and development for Web3 products on the Aptos blockchain: Liquid swap (DEX), Pontem Wallet, and PontemAI. • Designed backend architecture for PontemAI using LangchainJS, created dynamic routing and vector database integration. • Oversaw technical hiring, partner negotiations, and internal tooling. • Tech Stack: NestJS, MongoDB, PostgreSQL, Redis, Web3, LangchainJS, GPT, Chrome Extension APIs.
Senior Frontend Developer | Remote (Germany)
SoTrusty
September 2021 - June 2022
• Led front-end development for an eCommerce PWA using Angular2+. • Built a real-time onboarding flow preview and implemented mobile-first design. • Upgraded Angular codebase from v6 to v12 and introduced unit testing. • Tech Stack: Angular 2+, TypeScript, MS Azure, RxJS, PWA.
Frontend Developer | New York, USA
Wing
January 2020 - May 2022
• Developed client-facing apps and onboarding flows with React and Next.js. • Built an eCommerce platform from scratch with SSR, SPA syncing, and SEO optimization. • Designed admin panel UI/UX and performance-enhancing tools. • Tech Stack: React, Next.js, Angular2+, Cypress, WordPress, Service Workers.
Team Manager | Taganrog, Russia
Leviossa
September 2019 - April 2021
• Scaled and managed the JS development team and project workflows. • Implemented development processes, mentoring frameworks, and Agile practices. • Drove company growth through team expansion and technical leadership.
Web Software Developer | Taganrog, Russia
Company Group 'DUNICE'
October 2016 - October 2019
• Full-stack development across multiple domains: o Booking services (calendar/time zone logic, email triggers). o eCommerce with Stripe integration and international logistics. o Design community (React image optimizations and messaging). o Fitness mobile app (Ionic, calorie tracking, geolocation). o Real estate service (Angular2+, Google Maps, component library, testing). • Tech Stack: AngularJS, Angular2+, React, Node.js, MongoDB, Redis, AWS, Ionic, Stripe.
EDUCATION
Bachelor's degree
National University of Science and Technology POLITEHNICA Bucharest, April 2012
Specialist, Automation And Control Of Technological Processes
Verified Full Stack Developer
8+ years of experience
Preferred commitment: Full Time
Languages
Skills
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