Available to hire
Hi, I’m Christopher Metzner, a Senior Software Engineer with over 9 years of experience in full lifecycle software development. I’ve worked extensively with frontend frameworks like React and Angular, as well as backend technologies such as Node.js and Django. I have a growing passion for AI development and have built AI chatbots and Retrieval-Augmented Generation systems.
I’m enthusiastic about creating efficient, scalable, and user-friendly applications. Whether upgrading eCommerce platforms or building blockchain-based web browsers, I enjoy collaborating with teams to deliver quality solutions while keeping up with the latest technology trends.
Skills
Experience Level
Expert
Expert
Expert
Expert
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Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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Intermediate
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Intermediate
Language
English
Fluent
Work Experience
Senior Full Stack Developer at Intellectyx
June 30, 2025 - July 30, 2025Worked on a compliance management platform, migrating from Django to FastAPI to improve performance, real-time responsiveness, and scalability. Built an AI-powered chatbot for compliance queries reducing response times by 70%. Improved API response times by 30% through async FastAPI microservices. Refactored frontend components, implementing caching and debouncing strategies. Strengthened test coverage using Jest and React Testing Library to enhance reliability.
Senior Full Stack Developer at MASQ
December 31, 2024 - July 30, 2025Designed and developed the world's first blockchain-based web browser from scratch using React.js and Electron.js. Increased user engagement by 20% through global 3D Earth visualization. Improved file management efficiency by 30% with advanced interface features. Added real-time network monitoring, boosting user satisfaction by 25%. Developed automated update system with 90% adoption rate and introduced an integrated chat feature. Enhanced development efficiency by creating reusable components, cutting future development time by 20%. Led daily stand-ups, code reviews, and maintained high code quality reducing bugs by 30%.
Frontend Developer at Apple
April 30, 2021 - July 30, 2025Developed dynamic interactive data visualizations with D3.js and managed state efficiently using Redux. Followed best practices in React.js component architecture to build reusable components. Optimized frontend performance through lazy loading, code-splitting, and efficient rendering. Ensured code quality with comprehensive tests using Jest and Enzyme.
Full Stack Developer at Newegg
May 31, 2020 - July 30, 2025Upgraded eCommerce platform using the MERN stack, enhancing user experience with features like real-time inventory updates and personalized recommendations. Developed cross-platform NeweggContact App using React Native. Integrated React with Django backend for AI-driven recommendations. Built custom reusable React component library, optimized site performance, and deployed backend services with Express.js and AWS. Improved code quality through testing reducing bugs by 40%. Collaborated across teams to align on business goals and agile development processes.
Web Developer at RealSelf
August 31, 2015 - July 30, 2025Developed and managed the company website using WordPress. Built a healthcare platform with Laravel for secure patient data handling. Implemented real-time notification system with WebSocket, improving response times by 20%. Designed and optimized MySQL schemas, ensured browser compatibility, collaborated with UI/UX designers, and maintained codebase with Git.
Senior Full Stack Developer at Intellectyx
June 30, 2025 - July 30, 2025Worked on a compliance management platform for companies, playing a key role in migrating from Django to FastAPI focusing on performance, real-time responsiveness, and scalability. Built an AI-powered chatbot to help companies answer compliance questions by learning from internal documents, reducing HR and compliance query response times by 70%. Improved API response times by over 30% via migration to asynchronous FastAPI microservices. Refactored frontend components with caching and debouncing to boost performance in high-traffic areas. Enhanced testing coverage using Jest and React Testing Library for reliability.
Senior Full Stack Developer at MASQ
December 31, 2024 - July 30, 2025Designed and developed the world’s first blockchain-based web browser from scratch. Developed MASQ web browser with React.js and Electron.js focusing on enhancing user experience. Introduced 3D Earth global visualization increasing user engagement by 20%. Created advanced desktop interface featuring multi-tab and folder management improving file management efficiency by 30%. Implemented real-time network speed monitoring increasing user satisfaction by 25%. Improved global accessibility with localization/internationalization. Developed an automated update system achieving a 90% adoption rate. Added built-in chat with daily active users, reducing external communications. Designed reusable components enhancing development efficiency by 20%. Led daily standups, code reviews, and professional development.
Frontend Developer at Apple
April 30, 2021 - July 30, 2025Developed dynamic and interactive data visualizations using D3.js to simplify complex data, utilized Redux for efficient state management enabling smooth handling of large datasets and interactions. Implemented React.js best practices focused on reusability and maintainability of components. Optimized frontend performance through lazy-loading, code-splitting, and efficient rendering techniques. Created comprehensive unit and integration tests with Jest and Enzyme ensuring high code quality and reliability.
Full Stack Developer at Newegg
May 31, 2020 - July 30, 2025Upgraded Newegg’s eCommerce platform by adding real-time inventory updates, personalized recommendations, and secure checkout features. Developed and deployed a high-performance eCommerce website with the MERN stack driving client growth. Created NeweggContact App using React Native for both Android and iOS. Integrated React frontend with Django backend REST API for AI-driven personalized product recommendations and analytics. Built reusable React component library to enhance consistency and development speed. Optimized website performance focusing on fast loading and user experience. Implemented backend with Express.js for scalable server-side operations. Utilized AWS EC2 and S3 for scalable computing and reliable storage. Applied unit and integration testing reducing bugs by 40%, collaborated in cross-functional teams, and adhered to agile practices.
Web Developer at RealSelf
August 31, 2015 - July 30, 2025Developed and managed the company website using WordPress focusing on user-friendly design. Built a healthcare platform using Laravel ensuring secure handling of patient data. Implemented real-time notifications with WebSocket improving response times by 20%. Designed and optimized MySQL schemas for complex healthcare data. Ensured cross-browser compatibility through rigorous testing and debugging. Collaborated with UI/UX designers to translate mockups into functional webpages. Used Git for version control and team collaboration.
Senior Full Stack Developer at Intellectyx
June 30, 2025 - July 30, 2025Worked on a compliance management platform focusing on migration from Django to FastAPI for performance, scalability, and real-time responsiveness. Built an AI-powered chatbot to help answer compliance questions using internal documents. Reduced query response times by 70%. Improved API responses by 30% through architecture migration. Enhanced frontend performance with caching and debouncing, strengthened test coverage with Jest and React Testing Library.
Senior Full Stack Developer at MASQ
December 31, 2024 - July 30, 2025Designed and developed the world’s first blockchain-based web browser using React.js and Electron.js. Boosted user engagement by 20% with a 3D Earth visualization feature. Improved file management efficiency by 30% with multi-tab system and folder creation. Increased satisfaction by 25% with a real-time network speed monitor. Led localization efforts and a built-in chat feature engaging thousands daily. Achieved 90% adoption of an automated update system. Reduced bug reports by 30% through code reviews and reusable component libraries.
Frontend Developer at Apple
April 30, 2021 - July 30, 2025Developed dynamic interactive data visualizations using D3.js. Managed complex application state with Redux to handle large datasets. Followed React.js best practices for reusable components. Optimized frontend performance using lazy loading and code splitting. Wrote comprehensive unit and integration tests with Jest and Enzyme to ensure reliability.
Full Stack Developer at Newegg
May 31, 2020 - July 30, 2025Upgraded eCommerce platform with real-time inventory updates, personalized product recommendations, and secure checkout. Developed cross-platform NeweggContact App with React Native. Integrated frontend React interfaces with Django backend REST framework for AI-driven recommendations. Created reusable React component library for consistent UI. Utilized AWS EC2 and S3 for scalable cloud infrastructure. Improved code quality with Jest and Enzyme tests, reducing bugs by 40%. Collaborated with cross-functional teams in Agile environment.
Web Developer at RealSelf
August 31, 2015 - July 30, 2025Developed healthcare web application including appointment scheduling, medication reminders, and secure messaging. Managed company website with WordPress. Built healthcare platform with Laravel for secure patient data management. Implemented real-time notification system using WebSocket, improving response times by 20%. Designed and optimized MySQL database schemas. Ensured cross-browser compatibility and collaborated closely with UI/UX designers.
Education
Bachelor’s Degree at Seattle University
September 1, 2010 - May 31, 2014Bachelor's Degree at Seattle University – Seattle, WA
September 1, 2010 - May 31, 2014Bachelor’s Degree at Seattle University
September 1, 2010 - May 31, 2014Qualifications
Industry Experience
Software & Internet, Healthcare, Retail, Financial Services, Media & Entertainment, Consumer Goods
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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Intermediate
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