I'm Larry Xiong, a Senior Full Stack Engineer with 10+ years of experience building SaaS platforms, fintech systems, and high-scale applications. I specialize in Ruby on Rails, Python, Node.js, React, and modern cloud infrastructure, and I focus on performance improvements, maintainable code, and delivering measurable results. I enjoy collaborating with cross-functional teams and mentoring teammates to achieve project success.

Larry Xiong

I'm Larry Xiong, a Senior Full Stack Engineer with 10+ years of experience building SaaS platforms, fintech systems, and high-scale applications. I specialize in Ruby on Rails, Python, Node.js, React, and modern cloud infrastructure, and I focus on performance improvements, maintainable code, and delivering measurable results. I enjoy collaborating with cross-functional teams and mentoring teammates to achieve project success.

Available to hire

I’m Larry Xiong, a Senior Full Stack Engineer with 10+ years of experience building SaaS platforms, fintech systems, and high-scale applications.

I specialize in Ruby on Rails, Python, Node.js, React, and modern cloud infrastructure, and I focus on performance improvements, maintainable code, and delivering measurable results. I enjoy collaborating with cross-functional teams and mentoring teammates to achieve project success.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Expert
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Language

English
Fluent

Work Experience

Senior Software Engineer - Platform at RepairPal
July 1, 2025 - August 21, 2025
Developed and maintained backend systems, APIs, emailing & payment integration systems, and invoice management systems resulting in 30% performance improvements. Troubleshot complex parsing and storing of invoice documents and integration platforms which reduced errors in document parsing functionality by 50%. Applied best practices and design patterns which decreased code maintenance by 40% and bugs by 60%. Implemented testable, maintainable, well-organized codebases meeting company and team standards. Communicated closely with cross-team members on technical issues including software system design and frontend UI/UX issues. Actively participated in sprint planning, presentations, ticket building, and retrospective meetings to thrive in an agile environment.
Senior Software Engineer - Product at SaneBox
June 1, 2023 - August 21, 2025
Developed and maintained backend APIs and emailing integration systems, resulting in a 20% increase in user engagement. Troubleshot complex parsing and regex requirements for emailing systems and integration platforms, which reduced errors in email parsing functionality by 50%. Applied best practices and design patterns resulting in a 40% decrease in code maintenance and a 60% decrease in bugs. Implemented testable, maintainable, well-organized codebases meeting the company's internal standards and best practices. Communicated closely with clients on technical issues including software system design and maintenance effectively based on Domain-Driven Design. Demonstrated willingness to learn new technical and business domains.
Senior Software Engineer - Platform at DevBatch
September 1, 2022 - August 21, 2025
Built and maintained both backend and frontend parts of e-commerce websites and government projects resulting in a 25% increase in site traffic. Implemented TDD/BDD approaches for automating unit tests resulting in a 50% decrease in errors and a 20% increase to 98% test coverage. Extensively used jQuery libraries and node modules for UI improvements resulting in a 30% increase in user satisfaction. Mentored junior developers via pair programming and code reviews, resulting in a 50% increase in team productivity and a 35% decrease in bugs. Collaborated with product managers to analyze, diagnose, and articulate technical challenges and solutions effectively. Assisted QA, customer support, and DevOps teams with on-call service and escalated tickets.
Backend Engineer at Tintash
April 1, 2019 - August 21, 2025
Built APIs and integrated third-party APIs like payment gateway integrations resulting in a 40% increase in payment processing and a 25% increase in revenue. Developed microservice architecture collaborating with other developers to replace a legacy application while offering a compatible API. Built MVPs of e-commerce website shopping, payments, and shipping platforms resulting in a 20% increase in user signups and a 15% increase in sales. Collaborated closely with production, marketing, design, and implementation teams as well as QA for product releases. Created monitoring platforms for e-commerce websites. Worked on improving code quality, coverage, and security updates. Implemented new features and participated in business decisions such as task prioritization and feature estimation, improving overall development processes. Owned all phases and aspects of the software development lifecycle.
Full Stack Developer at Altoros Labs
October 1, 2016 - August 21, 2025
Learned basic web development and gained fundamental skills and experience in frontend and backend, resulting in a 20% increase in coding speed and a 30% increase in accuracy. Built mobile apps for both iOS and Android phones, resulting in 100% app downloads and a 5% increase in user retention. Built a medical products retail system integrating social login and 2FA, emailing and invoice generation resulting in a 25% increase in user engagement and management and a 15% increase in sales. Used advanced themes and template systems resulting in a 20% decrease in design and development timeline. Added documentation for the release process on Heroku of MERN projects. Collaborated with cross-functional teams to ensure product quality in a fast-paced startup environment.
Senior Software Engineer at RepairPal
July 1, 2023 - Present
Developed backend systems, APIs, and integrations for payments, invoicing, and notifications, delivering 30% performance improvements. Reduced invoice document parsing errors by 50% through regex optimization and integration fixes. Applied design patterns and meta-programming to cut maintenance by 40% and bug fixes by 60%, and implemented maintainable, testable code aligned with internal best practices. Collaborated across teams on system design and frontend issues, actively participating in Agile planning, retros, and demos.
Senior Software Engineer at Product SaneBox
June 1, 2023 - October 1, 2025
Improved user engagement by 20% through backend API and email integration enhancements, and cut email parsing errors by 50% with advanced regex and platform troubleshooting. Applied design patterns to reduce maintenance workload by 40% and bugs by 60%. Built robust email and integration systems using Ruby on Rails, Python, and Node.js, and collaborated directly with clients on system design challenges.
Senior Software Engineer – Platform at DevBatch
September 1, 2022 - October 1, 2025
Increased site traffic by 25% and stability by 15% by building full-stack e-commerce and government platforms. Implemented TDD/BDD workflows with 98% test coverage and a 50% reduction in errors. Enhanced UI with Node.js modules and jQuery, improving user satisfaction by 30%. Mentored junior developers, boosting productivity by 50% and reducing bugs by 35%.
Backend Engineer at Tintash
April 1, 2019 - October 1, 2025
Integrated third-party payment APIs, increasing revenue by 25%. Built microservices with Rails and Node.js to replace legacy applications. Developed MVP e-commerce features (shopping, payments, shipping) boosting signups by 20% and sales by 15%. Created PoC and MVP for a web performance monitoring platform for eCommerce sites. Owned full SDLC responsibilities, improving release cycles and product quality.
Full Stack Developer at Altoros Labs
October 1, 2016 - October 1, 2025
Built retail and medical platforms with social login, 2FA, and invoicing, raising sales by 15%. Developed mobile apps for iOS and Android, doubling downloads and raising retention by 5%. Implemented MERN projects with GraphQL APIs and CI/CD pipelines on AWS. Authored release documentation and improved SDLC processes.

Education

Bachelor's in Computer Science at California State University Sacramento
January 1, 2007 - January 1, 2012
B.S. Computer Science at California State University, Sacramento
January 11, 2030 - October 1, 2025

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Retail, Government, Healthcare, Professional Services