JJlleeoo

Developed bespoke learning course web applications, delivering custom digital education experiences.

• Enhanced web applications by integrating new features and improving performance
• Refactored legacy code and fixed bugs to boost maintainability and reliability
• Modernized front-end architecture by migrating components from Backbone.js to React
• Improved responsive UI using SCSS and Bootstrap, following mobile-first best practices
• Increased test coverage and confidence with end-to-end testing via Cypress
• Maintained and updated the company’s WordPress (Elementor) site for consistent content delivery

Led the migration of major infrastructure of an ecommerce site from MVC ASP.NET site to a modern Next.js + TypeScript site, overseeing both project management and hands-on development.

• Managed front-end team, setting coding standards, conducting code reviews, and mentoring junior developers
• Authored front-end documentation and best practices to improve onboarding and team consistency
• Maintained and improved third-party integrations (e.g., RichRelevance, Increasingly) to enhance user experience
• Collaborated cross-functionally with design, marketing, and SEO teams to align UI with business goals

Worked across three internal software products - contributing to feature development, refactoring, and architecture planning.

• Contributed to feature development and architecture across three products, including a full product redevelopment that led to +15% subscriptions, +25% session duration, +25% increase in session duration and -33% support enquiries
• Built scalable, typed React components and reusable hooks to enhance maintainability
• Modernized legacy code by refactoring class components to functional with composition patterns and context API
• Integrated complex GraphQL queries and mutations using classic Relay
• Collaborated with designers to improve UI/UX feasibility and flows, and with back-end developers to evolve the GraphQL API
• Helped shape front-end best practices alongside senior developers

Worked across retainer and production teams developing, deploying and maintaining legacy and modern headless sites - prioritizing performance, SEO and animation quality.

• Deployed projects via WPEngine, Vercel, and Netlify, ensuring smooth releases
• Translated high-fidelity Figma designs into responsive, high-performing front-end experiences
• Acted as primary technical contact for clients throughout project timelines, ensuring alignment with development milestones and client expectations
• Collaborated with designers, animators, and copywriters to deliver cohesive digital products
• Refactored and added to PHP backend to support new front-end features
• Contributed extensively to the team’s internal development wiki, improving documentation, onboarding processes, and technical knowledge sharing
• Improved development efficiency through smart use of AI tools like ChatGPT and Cursor IDE