Mobile architecture & UI
React Native and Expo applications, typed with TypeScript. Reusable components, state management, gestures, and animation across iOS and Android.
Applied at CosmartJanaka Jati Lasmana / Mobile engineer
I build apps
you come back to.
React Native, from the first prototype to the App Store. Currently building at Jago Coffee.
Download full CV PDF · Google DriveAn interactive portfolio. Sized like the apps I build.
A career spent
thinking in mobile.
From insurance and logistics to the coffee on your doorstep.
I’m Jati, a React Native developer.
I work on application architecture, release pipelines, and the screens people actually use. My work spans healthcare, insurance, logistics, and e-commerce.
Jago Coffee
Senior Frontend Engineer
Feb 2025 – Present
Corom
Fullstack React Native Engineer
Feb 2025 – Jul 2026
Cosmart
Senior Mobile Engineer
Jan 2023 – Jan 2025
Choir Express
Senior Mobile Engineer
Feb 2020 – Jan 2023
Generali Indonesia
React Native Developer
Mar 2019 – Feb 2020
Aegislabs
Junior Software Engineer
Jun 2016 – Feb 2019Skills / from interface to release
The work behinda mobile app.
Services & integrations
Firebase, REST and GraphQL, push notifications, and in-app purchases. Connecting the interface to the services a product depends on.
Applied at Mental JourneyPerformance & delivery
App performance, release automation with Fastlane and GitHub Actions, and OTA updates. Maintaining the product after its first release.
Applied at Jago CoffeeSelected development work
Showcase Projects
A selection of the apps I’ve helped develop. The products and brands belong to their respective owners.
01 / Coffee delivery
Jago Coffee
My development contribution
Frontend engineering at Jago Coffee, working with React Native, Firebase, release automation, animation, and gamification.
02 / Online supermarket · E-commerce
Cosmart
My development contribution
Designed the app architecture, shipped iOS and Android, and owned code quality. Focused on a shopping experience that improves customer satisfaction and retention.
03 / Health & beauty clinic · Healthcare
Diri Care
My development contribution
Built the application architecture, delivered the MVP and post-MVP features, and led a full mobile UI revamp for a health and beauty clinic app.
04 / Community · Mental wellbeing
Mental Journey
My development contribution
Built a privacy-first experience for an anonymous support community. Worked on app performance, in-app ads, and purchases from launch.
05 / Skincare · E-commerce
Avoskin
My development contribution
Worked on application design and ongoing maintenance to make the skincare shopping experience smooth and reliable.
06 / Nationwide logistics
Choir Express
My development contribution
Worked as a Senior React Native Developer on a nationwide logistics platform, bringing complex delivery workflows to mobile.
There’s more in my CV.
See my full project history, experience, and development work.
Small details. Real impact.
100K+users reached
4.9★average app rating
9+years building mobile
Open for freelance & collaboration