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I am a passionate UX Designer and Developer based in Singapore, with experience designing and building responsive web and mobile applications. My work spans from appointment booking systems to mental wellness apps, blending user experience expertise with full-stack development skills using technologies like React Native, PHP, and Firebase. I enjoy leading projects that combine accessibility, innovative design, and collaboration with multiple stakeholders. With a strong academic background in Information Engineering and Media from Nanyang Technological University, I actively contribute to tech communities and non-profits, providing pro-bono design and development support. My technical skills include a range of programming languages, design software, and creative technologies. I strive to create engaging digital products that improve user interaction and accessibility across platforms.…I am a passionate UX Designer and Developer based in Singapore, with experience designing and building responsive web and mobile applications. My work spans from appointment booking systems to mental wellness apps, blending user experience expertise with full-stack development skills using technologies like React Native, PHP, and Firebase. I enjoy leading projects that combine accessibility, innovative design, and collaboration with multiple stakeholders. With a strong academic background in Information Engineering and Media from Nanyang Technological University, I actively contribute to tech communities and non-profits, providing pro-bono design and development support. My technical skills include a range of programming languages, design software, and creative technologies. I strive to create engaging digital products that improve user interaction and accessibility across platforms.

Heidi Leesi

UX Designer, Web Designer, Web Developer, +7

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I am a passionate UX Designer and Developer based in Singapore, with experience designing and building responsive web and mobile applications. My work spans from appointment booking systems to mental wellness apps, blending user experience expertise with full-stack development skills using technologies like React Native, PHP, and Firebase. I enjoy leading projects that combine accessibility, innovative design, and collaboration with multiple stakeholders. With a strong academic background in Information Engineering and Media from Nanyang Technological University, I actively contribute to tech communities and non-profits, providing pro-bono design and development support. My technical skills include a range of programming languages, design software, and creative technologies. I strive to create engaging digital products that improve user interaction and accessibility across platforms.…I am a passionate UX Designer and Developer based in Singapore, with experience designing and building responsive web and mobile applications. My work spans from appointment booking systems to mental wellness apps, blending user experience expertise with full-stack development skills using technologies like React Native, PHP, and Firebase. I enjoy leading projects that combine accessibility, innovative design, and collaboration with multiple stakeholders. With a strong academic background in Information Engineering and Media from Nanyang Technological University, I actively contribute to tech communities and non-profits, providing pro-bono design and development support. My technical skills include a range of programming languages, design software, and creative technologies. I strive to create engaging digital products that improve user interaction and accessibility across platforms.

Available to hire

I am a passionate UX Designer and Developer based in Singapore, with experience designing and building responsive web and mobile applications. My work spans from appointment booking systems to mental wellness apps, blending user experience expertise with full-stack development skills using technologies like React Native, PHP, and Firebase. I enjoy leading projects that combine accessibility, innovative design, and collaboration with multiple stakeholders.

With a strong academic background in Information Engineering and Media from Nanyang Technological University, I actively contribute to tech communities and non-profits, providing pro-bono design and development support. My technical skills include a range of programming languages, design software, and creative technologies. I strive to create engaging digital products that improve user interaction and accessibility across platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Chinese

Advanced

Work Experience

Project Lead & Technical Lead at iLight 2025: In Tandem

June 30, 2025 - July 19, 2025

- Led technical development of an immersive public installation transforming participants' pulse data into synchronized light and sound compositions. - Integrated Arduino microcontrollers with TouchDesigner for real-time audiovisual processing. - Developed initial functional prototypes including hardware integration, sensor calibration, and interactive visualization systems. - Optimized system reliability and refined interactive elements for public deployment. - Coordinated with PICO, the school, and stakeholders to ensure smooth project execution. Managed team communication, setup logistics, and task delegation as project lead.

VR Developer at Art Design Media NTU

December 31, 2024 - July 19, 2025

Led the development of a VR simulation for autonomous vehicle research, enhancing real-world testing scenarios. Integrated AI chatbot functionalities within simulation to enable dynamic user interactions and real-time responses. Collaborated with AI researchers to ensure accurate simulation of autonomous vehicle behaviors.

User Experience Designer at GovTech – Accessibility (A11y) Team

May 31, 2024 - July 19, 2025

• Spearheaded end-to-end design of innovative Android accessibility scanning tool from wireframes to high-fidelity prototypes • Developed desktop interface for accessibility report visualization, creating cohesive cross-platform experience • Designed the first MVP version of a mobile scanning tool which was showcased as a key innovation during GovTech’s 2024 A11y Week • Collaborated with developers to assess and ensure the technical feasibility of design solutions • Liaised with the tech lead and product manager to define and refine project requirements, ensuring alignment with user needs and technical capabilities.

User Experience Designer at Inspireo

May 1, 2021 - July 31, 2021

• Liaised closely with Product Manager and UX strategist to to develop design concepts and wireframes across multiple digital platforms • Facilitated development across diverse projects including e-commerce, appointment booking systems, and complex enterprise resource planning(ERP) using UX expertise to improve user experience • Partnered with UI designer to transform wireframes into user interfaces while maintaining design system consistency • Designed and implemented new features and improvements in websites and mobile applications • Conducted user research activities including user interviews, contextual inquiry, and usability testing

UX Designer, Accessibility Enabling Team Internship at Govtech

May 1, 2024 - August 16, 2025

Designed diverse projects including e-commerce, appointment booking systems, and complex ERP systems using UX expertise to enhance user experience. Conducted user research activities such as user interviews, contextual inquiry, and usability testing to inform design decisions.

UX Designer Internship at Inspireo

July 1, 2021 - August 16, 2025

Developed custom pulse-responsive software and hardware for immersive installations using Arduino, force sensors, and Touch Designer. Led coverage at iLight2025, collaborated with Pico Group, and managed a 3-member team to ensure smooth project execution. Directed art flow, UX, and prototyping.

Project Lead & Technical Lead (Contract) at iLight2025: In Tandem

June 1, 2025 - August 16, 2025

Provided pro-bono web design and development services supporting local non-profit organizations' digital presence using UX practices including site mapping. Developed responsive websites with CMS and form integration for Tapestry Project Singapore using Framer, and redesigned/ built responsive websites for Project Starfish Singapore on Wix with CMS functionality. Managed project timelines and deliverables from February 2025 to June 2025.

Freelancer - Designer at Self-employed

August 1, 2021 - Present

Designed and developed interactive web experiences including 'find your aura' using HTML, CSS, JavaScript, P5.js, and ML5.js libraries.

VR Developer (Part-time) at NTU Media

December 1, 2024 - August 16, 2025

Redesigned National Library Board’s seat booking system and iShop Changi’s website with UX design and case studies. Developed Eye dylic VR and XR interactive media built with Unity. Led motion gesture snake arcade game software and hardware development using OpenCV and Arduino. Created motion-tracking interactive installations using Touch Designer and Media Pipe. Built generative art installations using Arduino, Processing with C/C++ programming, sensors, and sound modules. Integrated OpenCV with Unity (C#) for mixed reality gaming experiences.

Software Developer at Self

March 1, 2025 - August 16, 2025

Designed and developed a full-stack responsive appointment booking system web application using HTML, CSS, JavaScript, PHP, and SQL from September 2024 to November 2024. Designed and built a full-stack mental wellness mobile app with React Native, NoSQL, and Firebase with AI integration from January 2025 to March 2025.