Hi, I’m Gemintang
Software Engineer
“Be interested, not interesting.”
I'm far more interested in what you are building and the challenges you face than in boasting about my skills.
Select an option on the right that matches your goals, and let's see how I can help you succeed.
Start Here
What brings you here today?
Technologies I Use
A collection of frameworks, libraries, and tools I use to build robust applications.
My Services
Engineering solutions focused on performance, scalability, and user needs.
Front-End Development
Want an interface that keeps visitors engaged? I build responsive, highly-accessible web applications using Next.js & React with a focus on clean layouts, performance tuning, and Core Web Vitals.
Back-End & APIs
Need server architectures that don't crash under load? I design secure, structured, and scalable APIs using NestJS and Node.js to keep your business workflows and data flowing safely.
Mobile App Development
Looking for a mobile app that works flawlessly across iOS & Android? I develop robust Flutter applications with optimized rendering list performance, custom storage caching, and device hardware integrations.
System Analysis & Design
Unsure how to translate business ideas into scalable code? I map out visual process workflows, plan relational DB schemas, and design robust architectures so we build exactly what you need.
Featured Projects
Enterprise-grade solutions solving real-world business problems.
PHC Mobile: Attendance & HR System
Built an internal HR mobile app covering attendance, leave requests, and employee records. Face recognition handles check-in validation; geolocation logs entry and exit.
PHC Mobile: Gamification Module
Added a gamification module to the PHC app — quiz challenges, a leaderboard, and performance work to keep scrolling smooth on large datasets. Capped the image cache to prevent storage from growing out of control. Resized images at load time to match UI dimensions and reduce memory pressure.
PeriplusApps Mobile
Worked on PeriplusApps, a mobile e-commerce app tied to periplus.com. Focused on performance tuning, fixing visual inconsistencies across devices, and getting features to behave reliably across different modules. Cut duplicate API calls and corrected endpoints that were pointing to the wrong places. Fixed layouts to behave consistently across phone and tablet screen sizes. Tracked down and fixed a set of bugs: bad request mappings, UI overflow, and state that wasn't being reset properly.
Mobile POS (Point of Sale) Application
Built a mobile POS app for cashier operations — transaction processing, product handling, and receipt printing. Simpler and easier to maintain than the desktop system it replaced.
Book Search & Recommendation System
Built a book search and recommendation feature for a large product catalog, with keyword search, suggestions, and basic recommendation logic.
NADIA – Network Terminal Equipment Management
Worked on an internal Telkom Indonesia system for managing returned NTE assets like customer routers. Untangled confusing workflows, fixed bugs in older features, and tidied up the code structure.
About Me
Hi, I’m Gemintang Sangkaji Furqon, a Software Engineer focused on translating business needs into high-quality mobile and web applications.
I currently work as a Full Stack & Mobile Developer at PT Javabooks Indonesia, where I develop commercial mobile features, POS configurations, and search indexing platforms.
Previously, I built backend architectures and migrated legacy database structures at Telkom Indonesia, ensuring data security and clean code practices.
Tech stack: Flutter, NestJS, Next.js, Python, PostgreSQL, MySQL.
Full-Stack Collaboration
I bridge mobile, frontend, and backend to keep development clean and unified. I enforce code standards using SonarQube, automate lint stages (Husky), and design databases (PostgreSQL, MySQL) for high-availability systems.
Frequently Asked Questions
Here are some answers to questions you might have.
Let's Work Together
Looking for a collaborative full-stack engineer who values clean code? Reach out below to discuss open opportunities or team needs.