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Hi, I’m Jonathan Ko, a front-end focused software engineer who thrives on building responsive, scalable, and user-centric web applications. I enjoy turning complex requirements into clean, maintainable code and collaborating with cross-functional teams to create delightful UX while keeping design systems robust and extensible. I’ve led and contributed to multiple consumer-facing websites using React, GraphQL, and modern JavaScript stacks. I’m passionate about performance optimization, feature development, and documentation that accelerates onboarding and team velocity. When I’m not coding, I enjoy exploring new tools, mentoring teammates, and contributing to open-source projects.…Hi, I’m Jonathan Ko, a front-end focused software engineer who thrives on building responsive, scalable, and user-centric web applications. I enjoy turning complex requirements into clean, maintainable code and collaborating with cross-functional teams to create delightful UX while keeping design systems robust and extensible. I’ve led and contributed to multiple consumer-facing websites using React, GraphQL, and modern JavaScript stacks. I’m passionate about performance optimization, feature development, and documentation that accelerates onboarding and team velocity. When I’m not coding, I enjoy exploring new tools, mentoring teammates, and contributing to open-source projects.

Jonathan Ko

Full Stack Developer, Front-End Developer, Web Developer, +2

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Hi, I’m Jonathan Ko, a front-end focused software engineer who thrives on building responsive, scalable, and user-centric web applications. I enjoy turning complex requirements into clean, maintainable code and collaborating with cross-functional teams to create delightful UX while keeping design systems robust and extensible. I’ve led and contributed to multiple consumer-facing websites using React, GraphQL, and modern JavaScript stacks. I’m passionate about performance optimization, feature development, and documentation that accelerates onboarding and team velocity. When I’m not coding, I enjoy exploring new tools, mentoring teammates, and contributing to open-source projects.…Hi, I’m Jonathan Ko, a front-end focused software engineer who thrives on building responsive, scalable, and user-centric web applications. I enjoy turning complex requirements into clean, maintainable code and collaborating with cross-functional teams to create delightful UX while keeping design systems robust and extensible. I’ve led and contributed to multiple consumer-facing websites using React, GraphQL, and modern JavaScript stacks. I’m passionate about performance optimization, feature development, and documentation that accelerates onboarding and team velocity. When I’m not coding, I enjoy exploring new tools, mentoring teammates, and contributing to open-source projects.

Available to hire

Hi, I’m Jonathan Ko, a front-end focused software engineer who thrives on building responsive, scalable, and user-centric web applications. I enjoy turning complex requirements into clean, maintainable code and collaborating with cross-functional teams to create delightful UX while keeping design systems robust and extensible.

I’ve led and contributed to multiple consumer-facing websites using React, GraphQL, and modern JavaScript stacks. I’m passionate about performance optimization, feature development, and documentation that accelerates onboarding and team velocity. When I’m not coding, I enjoy exploring new tools, mentoring teammates, and contributing to open-source projects.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Sr. Front End Developer (Contractor) at RLS & Associates, Inc.

January 1, 2023 - January 1, 2024

Maintained and optimized the company’s consumer-facing web application using React, GraphQL, and in-house libraries to boost site efficiency and UX. Implemented a new recommendations container feature that empowered customers to upvote or remove recommendations, integrating user feedback with product data to drive personalized experiences. Authored documentation to identify ownership across a 30-person e-commerce team, increasing development velocity and onboarding efficiency. Successfully drove adoption of an updated container library across five website teams to ensure consistency and performance.

Front End Developer (Contract) at RLS & Associates, Inc.

January 1, 2023 - January 1, 2024

Revamped the React-based web application, enhanced security protocols, and elevated user experiences through UI/UX improvements. Implemented and integrated the platform’s real-time auditing features to alert users of data anomalies beyond expected bounds. Created a project management dashboard with Django, enabling admins to modify auditing and calculation parameters and keep the application accurate and up-to-date without developer intervention.

Full Stack Engineer (Contractor) at The Home Depot

January 1, 2021 - January 1, 2023

Maintained and optimized the main consumer-facing website using React and GraphQL, leveraging in-house libraries to enhance performance and consistency. Implemented new recommendations container, improved site security, and aligned with UX goals. Authored documentation to identify and attribute ownership across teams, increasing development velocity and onboarding efficiency. Drove platform-wide auditing features and improved readiness through cross-functional collaboration.

Full Stack Engineer (Contractor) at Hack for LA

January 1, 2020 - Present

Led two integrated systems: the Transportation Demand Calculator (TDMC) to streamline permit workflows for major construction projects, and the Hack for LA Volunteer Resource Management System (VRMS) to improve volunteer engagement and retention. Contributed to modularity, scalability, and performance by refactoring React components and structures. Implemented IAM integration with Google and GitHub APIs to grant new members access to projects.

Front End Engineer (Contractor) at Wide-E Lite Communications Limited

January 1, 2019 - January 1, 2020

Designed and developed client websites, transforming mocks into responsive interfaces and delivering real-time data and analytics.

Front End Engineer (Contractor) at Squeeze Technology

January 1, 2018 - January 1, 2018

Architected responsive client websites, transforming mockups into pixel-perfect UIs. Implemented Bootstrap framework and SASS styling to improve code modularity and scalability, ensuring ease of future development and maintenance.