# Louis Leon > Full Stack Software Engineer Location: San Francisco, California, United States Profile: https://flows.cv/louisleon I'm an inquisitive and analytical full-stack developer with six years of experience building products with fast-paced startups. I'm currently a TypeScript/JavaScript developer with a focus on the frontend and expertise in React. I also have experience building REST and GraphQL APIs and microservices using frameworks like Express.js, Nest.js, and Serverless. I have worked with multiple relational and non-relational databases (e.g. MySQL & PostgreSQL, MongoDB, DynamoDB), and I've designed data models and schema from product requirements. I also have some experience deploying servers and cloud infrastructure on AWS. While I'm most experienced with TypeScript/JavaScript, I'm also familiar with Python, Ruby, and Java, and I love learning new languages and libraries! I believe in collaboration and sharing expertise, so I strive to participate in code review, writing documentation, and pair programming. I love being able to see my work directly improving the end user experience or making my coworkers' jobs easier. When I'm not at my computer, I enjoy playing music, swimming, and exploring the bay area on foot or bike. ## Work Experience ### Software Engineer @ Sydecar Jan 2024 – Present | San Francisco, California, United States ### Senior Software Engineer @ Fractal Jan 2024 – Jan 2024 | Redwood City, California, United States - Recruited for a long-term contract with leading Enterprise AI company C3.ai, working in person at C3 offices as an Application Developer on base applications. Quickly learned and started using C3’s in-house type system, UI framework, and more. - Collaborated to build an enterprise resource planning application for business-critical customers. Empowered users to schedule complex manufacturing and distribution systems using AI-driven optimization and flexible analysis and experimentation tools. - Responsible for the front and back end of a crucial page reporting on manufacturing metrics. Users can compare metrics, aggregate data across time periods and physical resources, and experiment with potential plans to optimize their production schedules. ### Software Engineer @ Robin Healthcare Jan 2021 – Jan 2023 | Berkeley, California, United States - Developed a clinical note templating feature to accommodate hundreds of doctors’ individual preferences and enable a customer-focused scribing service. Added backend logic and data models to our Nest.js GraphQL API and built multiple views for admins and users with React. Scoped data so that users saw templates based on their work assignments. Later ported the frontend to the Slate.js editor framework to enable new features while ensuring backwards compatibility with existing data. - Built a live search tool used daily by our 150+ scribes to find accurate medical codes for doctors, increasing coding accuracy and reducing insurance payment denials. This was a React frontend powered by a third-party medical vocabulary API, featuring live results and a contextual form to refine the accuracy of the selected result. Worked with the API vendor to ensure compliance. - Worked as one of 3-4 main developers for our admin portal, used internally across Robin to view and manage our business APIs and data. Helped implement and document patterns to generate forms from GraphQL introspection results and integrate custom business logic into default forms, while supporting a required legacy framework. Added multiple views and features, allowing admins to manage encrypted login credentials, contextual input suggestions for our scribing app, and more. - Contributed to building our internal Nest.js GraphQL API used by over 10 services and frontend apps. Tasks included adding functionality to our data authorization service, adding custom scalar types and data validation, and exploring patterns for integration testing, as well as regular maintenance, bugfixes, and automated testing. ### Software Engineer @ Riva Jan 2019 – Jan 2020 | Palo Alto - Worked with a small team to build a cost-efficient REST API using serverless patterns in AWS (Lambda, API Gateway, Cloudformation, and etc.) - Researched and built a live chat between Riva’s user-facing React app and a third-party CRM, using GraphQL subscriptions and WebSockets with AWS AppSync. - Implemented Riva’s payment system using Stripe. Integrated frontend components, secure external APIs, and business requirements for recurring payments and custom subscription plans. ### Instructor @ MVCode Jan 2018 – Jan 2019 | San Francisco Bay Area - Worked both alone and with a team to introduce students to programming. Developed custom goals and lesson plans for each student; reported to parents, schools, and managers on individual progress and adjusted lessons accordingly. - Introduced students to core concepts of programming, starting with MIT's Slack teaching tool and advancing to JavaScript projects. ### Instructor @ Mathnasium - The Math Learning Center Jan 2017 – Jan 2018 | Austin, Texas Area - Taught students in grades K - 12 all levels of math from arithmetic to calculus, using an individually tailored curriculum that emphasized comprehension over rote memorization. - Worked with students in a group setting, tracked progress and outcomes, and led individual tutoring sessions when necessary to improve performance on school assignments or standardized tests. ## Education ### Computer Software Engineering App Academy ### Bachelor's degree in Philosophy The University of Texas at Austin ## Contact & Social - LinkedIn: https://linkedin.com/in/louis-c-leon - Portfolio: https://louis-c-leon.github.io/portfolio - GitHub: https://github.com/Louis-C-Leon --- Source: https://flows.cv/louisleon JSON Resume: https://flows.cv/louisleon/resume.json Last updated: 2026-04-10