"How does this feel to use?"
Statisfaction
Delivered
Project
Experience
A Career Built
Through RealWorld Experience
Learning by doing, growing through hands-on work, and delivering features used in production.
2017 - 2021
BINUS University
Game Application and Technology
Completed in 2.5 years
2020 - 2021
Frontend Developer Intern
Ruparupa - Kawan Lama Group
UI implementation and component consistency
2021 - 2022
Frontend Developer
Ruparupa - Kawan Lama Group
Shipped web features
2022 - Present
Frontend Engineer
Ruparupa - Kawan Lama Group
Scalable interfaces / frontend architecture
Meet Jason
Jason Halim is a Jakarta-based Frontend Engineer with a strong foundation in UI and user experience. With over four years of hands-on experience, he focuses on building production-ready web interfaces that feel clear, reliable, and effortless to use.
He has worked on large-scale consumer platforms at Kawan Lama Group, contributing to features used daily by thousands of users. His work spans from crafting scalable React and Next.js interfaces to implementing analytics and tracking systems such as GA4 and Mixpanel, ensuring products are not only beautiful, but measurable and effective.
Alongside engineering, Jason brings a designer’s eye to every interface. His background in UI/UX allows him to balance structure with sensitivity, aligning business goals with real user behavior. He values consistency over trends, clarity over noise, and long-term maintainability over quick wins.
Today, Jason continues to build thoughtful digital experiences where design and engineering move as one, creating interfaces that quietly do their job and stand the test of time.
Bringing Digital Experiences to Life
This collection highlights my latest projects, shaped through end-to-end UI/UX design and frontend development. Every interface is carefully crafted to balance visual harmony with functional precision, turning ideas into engaging and meaningful digital products.
Certifications & Achievements
Verified achievements from courses, programs, and competitions, reflecting continuous learning and applied professional growth.
Hand-On lab for a new era of agentic aI
This hands-on lab brought together developers and AI enthusiasts for a practical learning experience focused on building AI agents.
Through guided exercises and real development scenarios, participants explored how agent-based systems are designed and implemented, gaining hands-on exposure to tools, workflows, and concepts used in real-world AI development.
WhatsApp Business Summit
Attended the first WhatsApp Business Summit in Indonesia on November 1, 2023, held at The Ritz Carlton, Pacific Place, Jakarta. The summit explored the era of message driven business, highlighting how Business Messaging connects economic and social impact.
Sessions covered WhatsApp Business Platform use cases focused on improving customer engagement, building scalable solutions for today and the future.
Web Development Talk at BINUS
Shared experiences and insights as a web developer during a web development talk at BINUS University.
The session focused on practical knowledge, real-world perspectives, and open discussion, and concluded with a 99.62% participant satisfaction score, making the experience especially meaningful and rewarding.
UI Design & Prototyping Workshop with Figma at BINUS
A practical UI/UX workshop using Figma, guided by real-world web development experience.
The session focused on design fundamentals, prototyping workflows, and translating ideas into usable interfaces, and was rated 100% by participants.
Product Recommendation Optimization with Vue & AI
Developed and optimized an AI-driven product recommendation feature using Vue, contributing to a 35% increase in recommendation-driven sales and achieving 100.6% of the performance target.
his work was recognized with a KLIP Award nomination, highlighting its impact on business growth and user engagement.
Master of Ceremony for ruparupa 6th Anniversary Celebration
Served as the Master of Ceremony for ruparupa’s 6th anniversary event, guiding the flow of the celebration and engaging the team throughout the session.
A memorable internal event that highlighted teamwork, company culture, and shared milestones.
Interested in discussing a potential project?
Designed and developed with a commitment to quality and consistency
