Haryono
I buildmobile applicationsMobile Developer with 7+ years building production-grade Flutter and React Native apps used by 50,000+ doctors and 20,000+ monthly active users. Experienced in full mobile lifecycle — from architecture and CI/CD automation to App Store/Play Store deployment.
About Me
Get to know me better
I've been writing code professionally since 2019, and honestly, it started with being thrown into the deep end. At my first company, I was the only mobile developer. No senior to ask, no playbook to follow — just me, a Flutter framework I'd never used before, and a deadline. I shipped the app in two months. They gave me an appreciation award. I was hooked.
Since then I've worked on apps that real people actually depend on — a teleconsultation platform for 20,000+ monthly active users, a doctor community app with 50,000+ registered doctors, and health screening tools that have generated over IDR 1.5 billion in business deals. Before that, I replaced vendor Sales Force and HR systems at a manufacturing company with in-house solutions, saving the company IDR 120 million in the process. The tech stack changes, the industries change, but the goal is always the same: build something that works, scales, and actually solves a problem.
At Dexa Group I've grown beyond just shipping features. I've led a small frontend team, modernized legacy React Native codebases, set up CI/CD pipelines, and spent a lot of time in code reviews trying to make sure the people around me grow too. Watching someone go from struggling with a feature to owning it independently is one of the more satisfying parts of this work.
Outside of my main role, I take on freelance projects helping companies digitize their operational workflows — replacing manual Excel-based processes with proper digital systems and building internal tools from scratch.
I'm based in Bekasi, Indonesia. I work with Flutter and React Native daily, dabble in Next.js when needed, and have a soft spot for clean architecture and well-structured state management.
If you want to see what I've built, scroll down to the portfolio. If you want to talk, hit the contact button.
Work Experience
My professional journey
Software Engineer - Mobile Developer
PT Global Urban Esensial (Dexa Group)
•full-time- Developed a teleconsultation platform with over 20,000 monthly active users, facilitates efficient healthcare communication.
- Building a mobile platform for doctors to earn CPD points, access webinars, and manage teleconsultation operations, with a user base exceeding 50,000 doctors.
- Developed an online screening platform for partnerships with principals, with an estimated total of IDR 1.5 billion in MoUs collected.
- Led a frontend sub-team of 3 engineers and 1 intern within the community squad as technical lead, conducting regular 1-on-1s, pair programming sessions, and PR code reviews to maintain code quality and drive technical alignment across the team.
- Integrated Firebase Analytics for event and screen tracking, enabling data-driven decisions for Product and Data teams, leading to more accurate business insights and feature prioritization.
- Implemented network logger like Chucker to monitor real-time HTTP traffic, empowering QA and Backend teams with faster bug detection and resolution, reducing debugging time and enhancing release stability.
- Optimized app performance through caching, package upgrades, and code refactoring, resulting in a smoother user experience and reduced maintenance costs 10%.
- Deployed CodePush & alternative solutions for instant code updates, allowing Product teams to release fixes and new features faster, increasing business agility and reducing time-to-market from 2-3 days to realtime.
- Integrated Microsoft Clarity for real-time user session tracking, providing UI/UX, QA, and Product teams with actionable insights to enhance usability and conversion rates.
- Developed CI/CD pipeline using Codemagic, automating build and deployment processes, reducing manual workload for developers and accelerating app release time by 28%.
- Configured multi-environment setups for android & iOS, eliminating manual .env switching, and improving testing across multiple environments efficiency for QA & Dev teams.
- Enhanced app security by migrating authentication from client-side to server-side and implementing 2FA, ensuring data protection & compliance.
- Contributed to web development using Next.js for CMS other teams, Self-Screening & MCU products integrated with dKonsul which has an estimated MoU deal of IDR 500 million - 1 billion, supporting cross-platform product expansion and increasing business reach.
- Modernized legacy React Native codebases (D2D and iFocus) by migrating from class components to functional components with hooks, and transitioning state management from setState to Redux and Zustand. Improving code maintainability, readability, and team scalability.
Related Projects:
Full Stack Developer
PT Thubas Trans Nusantara
•freelance- Digitized transportation allowance tracking for a logistics fleet, replacing manual Excel-based reporting that took owners 1–3 days per cycle and was prone to formula errors, enabling real-time expense and revenue monitoring.
- Built end-to-end as a solo developer from mobile app to RESTful API backend, delivering a complete digital workflow for allowance requests, approvals, and disbursement tracking.
- Improved financial transparency and accountability with a digital approval flow that can be tracked in real-time by the finance and operations departments.
- Provided data-driven operational reports that help management analyze fleet efficiency and transportation expenses.
Related Projects:
Full Stack Developer
PT Thubas Liftindo Perkasa
•freelance- Built a mobile app for scheduling and reporting work activities across hundreds of forklift units (internal fleet and third-party service clients), reducing manual data loss by 90% and improving maintenance planning efficiency.
- Designed and developed the company website to strengthen online presence, improve brand credibility, and provide clear information about products and services, with Google Ads tracking integration to directly support unit sales, rentals, and spare part inquiries.
- Built an internal web-based management system for 35 employees covering attendance, leave, permit, and service operations. Centralizing workforce and operational data in one platform.
- Led digital transformation of attendance and reporting workflows, achieving 100% field compliance within six months and reducing administrative errors by 80%.
- Deployed mobile app to Play Store and managed full release process end-to-end.
Related Projects:
IT Programmer
PT Wiraswasta Gemilang Indonesia
•full-time- Developed a procurement system, reducing human error & paper usage by 20%, ensuring greater transparency & efficiency.
- Integrated procurement system with existing SAP infrastructure, supporting the company's gradual migration away from SAP dependency and enabling more efficient cash flow and resource allocation.
- Replaced vendor Sales Force and HR applications with in-house solutions, reducing company expenses by IDR 120 million through cost-effective solutions.
- Served as the sole mobile developer, owning the full mobile development lifecycle from new feature development based on user requirements to version upgrades and dependency management across all mobile projects.
- Standardized code documentation & version control using Git, ensuring better project organization, feature rollback, and maintainability.
- Implemented export functionality supporting Excel, PDF, HTML based on user requirements.
- Received appreciation for developing the first Cross-Platform application using Flutter within 2 months
- Implemented Firebase and REST API for seamless data integration and additional app functionalities.
- Deployed the app into App store and play store, ensuring a smooth release process and availability for end users.
- Enabled offline functionality using SQLite, allowing users to operate without a network and automatically sync data to the server when reconnected.
- Implemented Google Maps integration for real-time location tracking and destination navigation.
Related Projects:
Laboratory Assistant
Gunadarma University
•part-time- Assisted up to 3 employees daily with the installation, configuration, and troubleshoot technical issues that occur during learning.
- Trained & guided 25 students per class, resolving technical queries and ensuring an effective learning process
- Provided reviews & constructive feedback, enhancing student learning & engagement
Education
My academic background
Bachelor of Engineering
Gunadarma University
Information Technology
Comprehensive Information Technology education with a strong focus on software engineering and systems design. Served as a teaching and laboratory assistant, supporting computer science classes and facilitating hands-on practical sessions.
Achievements & Honors
- ▸Graduated Cum Laude
- ▸1st Winner of Game Application and E-Public Service Application, Kompetisi Kreatifitas Pembuatan Software (KOMPRES)
- ▸2nd Winner of Mobile Application, Kompetisi Kreatifitas Pembuatan Software (KOMPRES)
- ▸Indonesia Android Kejar by Google
Featured Projects
Some of my best work
D2D Mobile
Doctor community app for 50,000+ registered doctors in Indonesia, providing CME, medical webinars, teleconsultation, and IDI-accredited SKP points
dkonsul
Teleconsultation platform in the D2D ecosystem — connecting 450,000+ patients with 1,150+ doctors, with e-prescribing and pharmacy integration.
iFocus Integra
Coba ini: Intelligent field force platform with AI-powered call plan recommendations and automated WhatsApp outreach to doctors via internal AI agent.
iFocus Mobile
Field force mobile app supporting daily operations with call plan management, product knowledge, content feed, and team communication.
D2D Web
Web platform for medical professionals to manage P2KB — tracking SKP points, webinars, virtual events, activity logbook, and STR expiry reminders
SaaS Screening & MCU
SaaS platform digitizing health screening & MCU for pharma, hospital, and insurance partners — white label ready with Dkonsul integration
Achievements & Awards
Milestones and recognitions
1st Winner of Game Application, Kompetisi Kreatifitas Pembuatan Software (KOMPRES)
Informatics Engineering Laboratory, Gunadarma University
May 2018
Awarded in the Game Application category for Koruptor Kingdom, an FPS game focused on taking down corrupt figures, and in the E-Public Service Application category for Go Damkar, a fast-reporting platform for fire emergencies.
1st E-Public Service Application, Kompetisi Kreatifitas Pembuatan Software (KOMPRES)
Informatics Engineering Laboratory, Gunadarma University
May 2018
Awarded in the E-Public Service Application category for Go Damkar, a fast-reporting platform for fire emergencies.
2nd Winner of Mobile Application, Kompetisi Kreatifitas Pembuatan Software (KOMPRES)
Informatics Engineering Laboratory, Gunadarma University
May 2017
Awarded in the Mobile Application category under the theme Mobile Community Solution Apps with Sync, a platform that helps users explore various communities and their activities, while simplifying the registration process for events.
Get In Touch
Wherever you are in the world, let's work together on your next project.