Top Talent like Leon are on Pangea

Pangea, a YC company, connects companies with fractional talent. Fractional hiring allows companies to move faster and work with more specialized talent, while giving talent more flexibility and independence. If you are talent open to fractional work, apply here. If you’re a company looking for high-quality fractional talent, learn more here.

Leon Li

Full-stack Engineer • Frontend Developer • Backend Engineer • Katy, TX, US
Top Earner
Full Stack Development
Front-End Development
Mobile App Development
Backend Development
React
Next.js
TypeScript
React Native
Redux
Flutter
Node.js
Express.js
Python
HTML/CSS
Tailwind CSS
PostgreSQL
MongoDB
Firebase
Amazon Web Services
Microsoft Azure
Available for hire fromNegotiable
Full-Time Roles
Contracts
Full Stack Developer & Project Manager & Startup Tech Lead
Leon Li is a seasoned senior full-stack developer with a decade of experience in the IT industry. He excels at building web and mobile products, ranging from small-scale MVPs to large enterprise-level software solutions. As a front-end focused full-stack developer, Leon specializes in JavaScript libraries and frameworks such as React, Next.js, and Node.js. Throughout his career, Leon has been an active member of professional Scrum teams, becoming well-versed in Agile methodologies. He has played pivotal roles in implementing best coding practices, creating onboarding documentation, and reviewing extensive codebases. His collaborative nature has made him a valuable asset in cross-functional teams, and he has gained significant insight as both a lead developer and project manager. Leon is results-driven, consistently delivering pixel-perfect, mobile-friendly UI/UX designs that provide exceptional customer experiences. His experience working directly with clients across various industries has given him a deep understanding of successful development processes. Always eager to tackle new technical challenges, Leon is a quick learner who never stops improving his skills.

Projects

Monarch Money | Frontend & CMS

- What is Monarch Money? Monarch is your home base for money clarity, it simplifies finances by bringing all your accounts together into one clear view. Always know where your money is and where it's going, achieve your goals quicker, and collaborate with your partner or professional at no extra cost. - What I did on Monarch Money? As a senior Frontend Engineer, I played pivotal roles in developing its marketing site. The site was designed with dynamic content management, high performance, and an intuitive user experience, empowering the marketing team to manage updates independently. The entire project was successfully delivered within 2 months, providing a beautiful, high-performing, and SEO-optimized site that significantly enhanced customer engagement. - Tech Stack Next.js (App Router), Sanity CMS, Tailwind CSS, Shadcn/ui, Vercel - Results & Impact 🚀 Delivered the full codebase in just two months, ensuring a scalable, maintainable, and high-performing site. 💡 Enabled the marketing team to update content autonomously with Sanity CMS integration. ⚡ Achieved phenomenal UX with fast-loading pages, optimized images, and smooth interactions. 🔍 Boosted SEO performance, enhancing visibility and engagement.See More

Inflight Figma Plugin | Full Stack & Plugin Development

- What is Inflight Figma Plugin? Inflight is a Figma plugin designed to streamline the design feedback process for creators and teams. It allows users to select frames directly within Figma and export them as PNG or JPG files to a personal project hosted on Inflight.co, a dedicated design feedback platform. Beyond simple exporting, the plugin enables users to add voiceovers to provide context for their designs, making it easier to communicate intent and gather meaningful feedback and comments from teammates. Inflight bridges the gap between design creation and collaboration, enhancing workflows for designers seeking efficient, contextual feedback. - What I Did on This Plugin? As an independent developer, I single-handedly built the Inflight Figma Plugin from scratch, drawing on my rich experience crafting Figma plugins, including large-scale projects like Tokens Studio for Figma. 1. Development & Tech Stack: - Built the plugin using React, Vite, Tailwind CSS, and Shadcn/ui for a modern, efficient frontend - Integrated Supabase as a Backend-as-a-Service (BaaS) for authentication (email and Google), database management, edge functions for project updates, and storage buckets for exported image frames. 2. Code Quality & Best Practices: - Implemented ESLint, Prettier, and Husky to enforce the cleanest and most maintainable coding standards. - Delivered a pixel-perfect UI with a flexible, user-friendly UX tailored to designers’ needs. 3. Timeline & Ownership: - Completed the entire plugin in just 2 weeks, showcasing rapid yet meticulous development. - Took full ownership of the project as a solo developer, from concept to deployment. 4. Support & Iteration: - Provided long-term support post-launch to ensure stability and user satisfaction. - Currently working on the next version to introduce enhanced features and improvements.See More

Work History

C

Senior Full Stack Developer

CementworksPart-time Employee
C

Full Stack Developer & Project Manager & Startup Tech Lead

ContraFreelancer
M

Tech Lead & Front End Developer

Manifest AIContract EmployeeDec 2023 - Aug 2024 • 9 mos- Designed a flexible UI/UX with Next.js, Tailwind CSS, and Shadcn Ui. - Integrated well-documented RESTful APIs on the front-end with best coding practices of TanStack Query. - Built a seamless CI/CD pipeline using GitHub Actions, Docker, Makefile and used Grafana for infrastructure monitoring and Sentry for error tracking, resulting in detection of specific APIs with high system latency. - Led the development of an AI-powered MVP that enables users to build websites in minutes using only text input and LLMs, resulting in attracting potential fundraisers and angel investors.
T

Senior Full Stack Developer

TechmedicsFull-time EmployeeSep 2022 - Dec 2023 • 1 yr 4 mosContributed to the success of an enterprise-level financial services platform, serving over 100k+ users, through valuable contributions to the development and optimization of software solutions. - Led the development of a robust back-end system using Java, impacting the platform's performance and responsiveness. - Optimized PostgreSQL database structures and queries, resulting in a 30% reduction in system latency and enhancing data retrieval efficiency. - Implemented strategic caching mechanisms, reducing load times by 25% for critical functions and improving overall user experience. - Managed and maintained API endpoints, implementing robust error handling, optimizing performance, and ensuring secure data transmission to enhance system reliability and scalability.
T

Full Stack Developer

TechmedicsFull-time EmployeeApr 2020 - Sep 2022 • 2 yrs 6 mosPlayed a key role in the success of a real-time collaboration platform, actively participating in its development and optimization to meet the needs of a substantial user base exceeding 10k+ individuals. - Directed the development of responsive and intuitive front-end interfaces using React.js. - Executed and built back-end functionalities using Node.js and NestJS, contributing to the platform's robust architecture and scalability to accommodate a 50% growing user demands. - Successfully integrated third-party APIs and services like Twilio, Agora, and Google Cloud TTS, expanding the platform's functionality and providing users with a comprehensive suite of collaboration tools. - Identified and addressed performance bottlenecks, resulting in a 15% increase in overall system efficiency and responsiveness. - Established a robust CI/CD pipeline on AWS, incorporating Docker images and optimizing a GitHub workflow, leading to a significant 30% improvement in development speed and efficiency.
A

Full Stack Developer

AzumoFull-time EmployeeApr 2018 - Apr 2020 • 2 yrs 1 moLed the development of a healthcare information system as the lead full-stack developer, contributing to a 20% increase in system efficiency. - Achieved a 15% increase in query efficiency by optimizing GraphQL schemas and utilizing batched requests. - Engineered a secure and scalable RESTful API for the healthcare information system using Node.js, ensuring efficient communication between the front-end and back-end components. - Implemented cron jobs in Express.js for scheduled tasks, such as data backups and routine system maintenance, contributing to a 15% improvement in system reliability. - Executed interactive data visualizations using React components, enhancing the representation of healthcare data and facilitating a 50% better understanding for end-users. - Integrated Redux for complex state management scenarios, contributing to a 40% decrease in application bugs related to state inconsistencies. - Boosted UI responsiveness by utilizing useQuery with cached queries for efficient patient data fetching, complemented by useMutation to streamline data mutations and ensure a significant improvement in overall application performance.
A

Full Stack Developer

AzumoFull-time EmployeeNov 2017 - Apr 2018 • 6 mosPioneered the development and implementation of a cutting-edge Language Learning Chatbot, leveraging Python-based AI algorithms to create an interactive and personalized language learning experience for users, attracting and engaging over 10k+ learners globally. - Applied AI-based speech recognition in Python for accurate pronunciation evaluation during language exercises, providing instant feedback to users for improved spoken language skills. - Incorporated external language APIs seamlessly into Django, enriching language data sources and providing users with diverse and up-to-date language content for learning purposes. - Designed a responsive layout using Tailwind CSS, allowing the Chatbot to adapt seamlessly to various screen sizes and devices for a consistent user experience. - Utilized Next.js Server-Side Rendering to optimize the performance of the front-end, achieving a 20% reduction in page load times, ensuring swift content delivery and improving SEO rankings by generating responsive pages on the server, resulting in a seamless and responsive user experience. - Conducted thorough 200 code reviews, designed best practices with TypeScript, and employed unit testing using Jest, Mocha, and Chai, ensuring comprehensive test coverage and elevating the overall quality, maintainability, and reliability of the codebase.
U

Frontend Developer

UpworkFreelancerSep 2016 - Nov 2017 • 1 yr 3 mos- Showcased expertise in front-end technologies, building over 100+ responsive, pixel-perfect landing pages for 20 clients with React.js, Html, Bootstrap, and TypeScript. - Enacted OAuth2 authentication and authorization flows in the Node.js-based e-commerce site backend, utilizing JWT tokens for secure and stateless user sessions. - Utilized JSP's support for JavaBeans in conjunction with MySQL, facilitating efficient data handling and processing for a seamless user experience. - Delivered 5 prototyping websites for both companies and clients, utilizing React.js, Material UI, and Styled Components. - Advanced proficiency in back-end technologies, mastering Java, Node.js, and Microservices.
Reviews
Exceeds Expectations
Exceeds ExpectationsRecommended by clients 1 times.
Exceeds Expectations
Top EarnerHas earned $5k+ on Pangea.

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Education

The University of Texas at Dallas

Bachelor's degree, Computer Software EngineeringApr 2012 - Aug 2016

How Pangea Works

Effortlessly discover top talent

We’ve distilled the candidate search from endless hours down to just a few minutes. Using Pangea’s AI-powered search tools, you can find top fractional talent able to take on your next project. Our system looks at your company’s niche and your needs to find the perfect match faster than any traditional hiring platform.

Start working with talent today

The top talent on Pangea is ready to get started with you right now. You can message or hire a candidate right from their profile page and start assigning work as soon as they respond. And the best part? Pangea’s fractional contract structure lets you start small and ramp up as your needs change, keeping your costs manageable and your team’s capabliities flexible.

Track work and invoices in one place

Assign tasks, track progress, and complete invoices all on Pangea. We’ve combined every part of the hiring process into one platform to eliminate the miscommunication that’s unavoidable on other freelance platforms. We even send out 1099s to your contractors at the end of the year!

Talk with a Talent Expert

Members of our team are available to help you speed through the hiring process.
Available Now
Book a Call
Full Stack Developer & Project Manager & Startup Tech Lead
Leon Li is a seasoned senior full-stack developer with a decade of experience in the IT industry. He excels at building web and mobile products, ranging from small-scale MVPs to large enterprise-level software solutions. As a front-end focused full-stack developer, Leon specializes in JavaScript libraries and frameworks such as React, Next.js, and Node.js. Throughout his career, Leon has been an active member of professional Scrum teams, becoming well-versed in Agile methodologies. He has played pivotal roles in implementing best coding practices, creating onboarding documentation, and reviewing extensive codebases. His collaborative nature has made him a valuable asset in cross-functional teams, and he has gained significant insight as both a lead developer and project manager. Leon is results-driven, consistently delivering pixel-perfect, mobile-friendly UI/UX designs that provide exceptional customer experiences. His experience working directly with clients across various industries has given him a deep understanding of successful development processes. Always eager to tackle new technical challenges, Leon is a quick learner who never stops improving his skills.

Talk with a Talent Expert

Members of our team are available to help you speed through the hiring process.
Available Now
Book a Call

Top Talent like Leon are on Pangea

Pangea, a YC company, connects companies with fractional talent. Fractional hiring allows companies to move faster and work with more specialized talent, while giving talent more flexibility and independence. If you are talent open to fractional work, apply here. If you’re a company looking for high-quality fractional talent, learn more here.

Leon Li

Full-stack Engineer • Frontend Developer • Backend Engineer • Katy, TX, US
Top Earner
Full Stack Development
Front-End Development
Mobile App Development
Backend Development
React
Next.js
TypeScript
React Native
Redux
Flutter
Node.js
Express.js
Python
HTML/CSS
Tailwind CSS
PostgreSQL
MongoDB
Firebase
Amazon Web Services
Microsoft Azure
Available for hire fromNegotiable
Full-Time Roles
Contracts

Projects

Monarch Money | Frontend & CMS

- What is Monarch Money? Monarch is your home base for money clarity, it simplifies finances by bringing all your accounts together into one clear view. Always know where your money is and where it's going, achieve your goals quicker, and collaborate with your partner or professional at no extra cost. - What I did on Monarch Money? As a senior Frontend Engineer, I played pivotal roles in developing its marketing site. The site was designed with dynamic content management, high performance, and an intuitive user experience, empowering the marketing team to manage updates independently. The entire project was successfully delivered within 2 months, providing a beautiful, high-performing, and SEO-optimized site that significantly enhanced customer engagement. - Tech Stack Next.js (App Router), Sanity CMS, Tailwind CSS, Shadcn/ui, Vercel - Results & Impact 🚀 Delivered the full codebase in just two months, ensuring a scalable, maintainable, and high-performing site. 💡 Enabled the marketing team to update content autonomously with Sanity CMS integration. ⚡ Achieved phenomenal UX with fast-loading pages, optimized images, and smooth interactions. 🔍 Boosted SEO performance, enhancing visibility and engagement.

Inflight Figma Plugin | Full Stack & Plugin Development

- What is Inflight Figma Plugin? Inflight is a Figma plugin designed to streamline the design feedback process for creators and teams. It allows users to select frames directly within Figma and export them as PNG or JPG files to a personal project hosted on Inflight.co, a dedicated design feedback platform. Beyond simple exporting, the plugin enables users to add voiceovers to provide context for their designs, making it easier to communicate intent and gather meaningful feedback and comments from teammates. Inflight bridges the gap between design creation and collaboration, enhancing workflows for designers seeking efficient, contextual feedback. - What I Did on This Plugin? As an independent developer, I single-handedly built the Inflight Figma Plugin from scratch, drawing on my rich experience crafting Figma plugins, including large-scale projects like Tokens Studio for Figma. 1. Development & Tech Stack: - Built the plugin using React, Vite, Tailwind CSS, and Shadcn/ui for a modern, efficient frontend - Integrated Supabase as a Backend-as-a-Service (BaaS) for authentication (email and Google), database management, edge functions for project updates, and storage buckets for exported image frames. 2. Code Quality & Best Practices: - Implemented ESLint, Prettier, and Husky to enforce the cleanest and most maintainable coding standards. - Delivered a pixel-perfect UI with a flexible, user-friendly UX tailored to designers’ needs. 3. Timeline & Ownership: - Completed the entire plugin in just 2 weeks, showcasing rapid yet meticulous development. - Took full ownership of the project as a solo developer, from concept to deployment. 4. Support & Iteration: - Provided long-term support post-launch to ensure stability and user satisfaction. - Currently working on the next version to introduce enhanced features and improvements.

Work History

C

Senior Full Stack Developer

CementworksPart-time Employee
C

Full Stack Developer & Project Manager & Startup Tech Lead

ContraFreelancer
M

Tech Lead & Front End Developer

Manifest AIContract EmployeeDec 2023 - Aug 2024 • 9 mos- Designed a flexible UI/UX with Next.js, Tailwind CSS, and Shadcn Ui. - Integrated well-documented RESTful APIs on the front-end with best coding practices of TanStack Query. - Built a seamless CI/CD pipeline using GitHub Actions, Docker, Makefile and used Grafana for infrastructure monitoring and Sentry for error tracking, resulting in detection of specific APIs with high system latency. - Led the development of an AI-powered MVP that enables users to build websites in minutes using only text input and LLMs, resulting in attracting potential fundraisers and angel investors.
T

Senior Full Stack Developer

TechmedicsFull-time EmployeeSep 2022 - Dec 2023 • 1 yr 4 mosContributed to the success of an enterprise-level financial services platform, serving over 100k+ users, through valuable contributions to the development and optimization of software solutions. - Led the development of a robust back-end system using Java, impacting the platform's performance and responsiveness. - Optimized PostgreSQL database structures and queries, resulting in a 30% reduction in system latency and enhancing data retrieval efficiency. - Implemented strategic caching mechanisms, reducing load times by 25% for critical functions and improving overall user experience. - Managed and maintained API endpoints, implementing robust error handling, optimizing performance, and ensuring secure data transmission to enhance system reliability and scalability.
T

Full Stack Developer

TechmedicsFull-time EmployeeApr 2020 - Sep 2022 • 2 yrs 6 mosPlayed a key role in the success of a real-time collaboration platform, actively participating in its development and optimization to meet the needs of a substantial user base exceeding 10k+ individuals. - Directed the development of responsive and intuitive front-end interfaces using React.js. - Executed and built back-end functionalities using Node.js and NestJS, contributing to the platform's robust architecture and scalability to accommodate a 50% growing user demands. - Successfully integrated third-party APIs and services like Twilio, Agora, and Google Cloud TTS, expanding the platform's functionality and providing users with a comprehensive suite of collaboration tools. - Identified and addressed performance bottlenecks, resulting in a 15% increase in overall system efficiency and responsiveness. - Established a robust CI/CD pipeline on AWS, incorporating Docker images and optimizing a GitHub workflow, leading to a significant 30% improvement in development speed and efficiency.
A

Full Stack Developer

AzumoFull-time EmployeeApr 2018 - Apr 2020 • 2 yrs 1 moLed the development of a healthcare information system as the lead full-stack developer, contributing to a 20% increase in system efficiency. - Achieved a 15% increase in query efficiency by optimizing GraphQL schemas and utilizing batched requests. - Engineered a secure and scalable RESTful API for the healthcare information system using Node.js, ensuring efficient communication between the front-end and back-end components. - Implemented cron jobs in Express.js for scheduled tasks, such as data backups and routine system maintenance, contributing to a 15% improvement in system reliability. - Executed interactive data visualizations using React components, enhancing the representation of healthcare data and facilitating a 50% better understanding for end-users. - Integrated Redux for complex state management scenarios, contributing to a 40% decrease in application bugs related to state inconsistencies. - Boosted UI responsiveness by utilizing useQuery with cached queries for efficient patient data fetching, complemented by useMutation to streamline data mutations and ensure a significant improvement in overall application performance.
A

Full Stack Developer

AzumoFull-time EmployeeNov 2017 - Apr 2018 • 6 mosPioneered the development and implementation of a cutting-edge Language Learning Chatbot, leveraging Python-based AI algorithms to create an interactive and personalized language learning experience for users, attracting and engaging over 10k+ learners globally. - Applied AI-based speech recognition in Python for accurate pronunciation evaluation during language exercises, providing instant feedback to users for improved spoken language skills. - Incorporated external language APIs seamlessly into Django, enriching language data sources and providing users with diverse and up-to-date language content for learning purposes. - Designed a responsive layout using Tailwind CSS, allowing the Chatbot to adapt seamlessly to various screen sizes and devices for a consistent user experience. - Utilized Next.js Server-Side Rendering to optimize the performance of the front-end, achieving a 20% reduction in page load times, ensuring swift content delivery and improving SEO rankings by generating responsive pages on the server, resulting in a seamless and responsive user experience. - Conducted thorough 200 code reviews, designed best practices with TypeScript, and employed unit testing using Jest, Mocha, and Chai, ensuring comprehensive test coverage and elevating the overall quality, maintainability, and reliability of the codebase.
U

Frontend Developer

UpworkFreelancerSep 2016 - Nov 2017 • 1 yr 3 mos- Showcased expertise in front-end technologies, building over 100+ responsive, pixel-perfect landing pages for 20 clients with React.js, Html, Bootstrap, and TypeScript. - Enacted OAuth2 authentication and authorization flows in the Node.js-based e-commerce site backend, utilizing JWT tokens for secure and stateless user sessions. - Utilized JSP's support for JavaBeans in conjunction with MySQL, facilitating efficient data handling and processing for a seamless user experience. - Delivered 5 prototyping websites for both companies and clients, utilizing React.js, Material UI, and Styled Components. - Advanced proficiency in back-end technologies, mastering Java, Node.js, and Microservices.
Reviews
Exceeds Expectations
Exceeds ExpectationsRecommended by clients 1 times.
Exceeds Expectations
Top EarnerHas earned $5k+ on Pangea.

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Education

The University of Texas at Dallas

Bachelor's degree, Computer Software EngineeringApr 2012 - Aug 2016

How Pangea Works

Effortlessly discover top talent

We’ve distilled the candidate search from endless hours down to just a few minutes. Using Pangea’s AI-powered search tools, you can find top fractional talent able to take on your next project. Our system looks at your company’s niche and your needs to find the perfect match faster than any traditional hiring platform.

Start working with talent today

The top talent on Pangea is ready to get started with you right now. You can message or hire a candidate right from their profile page and start assigning work as soon as they respond. And the best part? Pangea’s fractional contract structure lets you start small and ramp up as your needs change, keeping your costs manageable and your team’s capabliities flexible.

Track work and invoices in one place

Assign tasks, track progress, and complete invoices all on Pangea. We’ve combined every part of the hiring process into one platform to eliminate the miscommunication that’s unavoidable on other freelance platforms. We even send out 1099s to your contractors at the end of the year!

Talk with a Talent Expert

Members of our team are available to help you speed through the hiring process.
Available Now
Book a Call
Pangea empowers fractional work across the world for marketing and design roles.