Matius Celcius Sinaga
Fullstack Software Developer · Software Architect · Product Builder
Fullstack Software Developer with 6+ years of experience delivering 15+ production systems across 4 countries — Indonesia, Australia, the United States, and globally through distributed teams. I handle the full software development lifecycle — from requirements and architecture through development, deployment, and maintenance.Currently open to freelance projects and app development opportunities.
Results That Speak
for Themselves
Workforce Rostering System
Built for a multi-location Australian enterprise — now managing 200+ employees
AI Palm Fruit Grader
Computer Vision system for automated harvest quality classification
React Native CRM App
Cross-platform mobile CRM shipped from scratch in under 3 months
Palm Oil Operations Dashboard
Real-time operational system used daily by 50+ active users
Dynamics 365 ERP Integration
Connected 3 Australian manufacturers with custom quotation systems
6+ Independent Products
Launched SaaS platforms, AI tools, and content systems from scratch
80% Performance Optimization
Optimized global organization app — 80% improvement in UI responsiveness and efficiency
The Tools I Use to
Build Reliable Systems
Frontend
Backend
Database
Cloud & Infrastructure
Enterprise Systems
Artificial Intelligence
Where I've Made
an Impact
Genesis Digital Asia
Frontend Developer
Developed the frontend for Yearglance.com, an annual calendar and planning application, during the platform's early-stage development.
- Built a dynamic interactive calendar feature still in active use today
- Deployed features directly to production with zero rollbacks
- Improved UI rendering performance by ~40% through DOM optimization
Software Developer
Led 3 major quotation and ERP integration projects for Australian enterprise clients across construction, agribusiness, and manufacturing industries — using Dynamics 365 BC, SQL Server, and e-Con Solutions.
- Built complete quotation management system for 4Site Australia — still in active daily use
- Developed fertilizer quotation platform for Agribusiness Australia with dual ERP synchronization
- Engineered manufacturing quotation system with complex pricing logic for Sutton Tools
Fullstack Developer
Developed a comprehensive workforce management system for a multi-location Australian organization — handling both frontend and backend development.
- Engineered rostering and scheduling engine — automated complex shift assignments
- Built frontend with JavaScript and backend services in C#
- Integrated with e-Con Solutions for enterprise data synchronization
Application Developer
Developed and optimized operational applications serving a global community spanning multiple countries and time zones.
- Optimized app performance, UI, and operational logic by up to 80%
- Developed features for thousands of globally distributed users
- Maintained system reliability during peak global event traffic
TTO CRM
Mobile Application Developer
Built a cross-platform CRM application for Android and iOS using React Native — single-handedly from requirements to production.
- Shipped production-ready app from scratch in under 3 months
- Implemented Job Management, Activity Tracking, and CRM features
- Deployed as the company's primary internal operational system
Akademix V2 — English Central Pekanbaru
Fullstack Developer
Building a comprehensive school and course management system for an educational institution.
- Developed from zero to 100% test-ready state
- Student Management, Academic Administration, and Course Management
- Designed to scale from single campus to multiple locations
PT BTR
Software Developer
Built an end-to-end operational system for a palm oil mill — replacing entirely manual, spreadsheet-based processes.
- Adopted by 50+ daily active users with 100% real-time operational data
- Eliminated manual data entry — measurable efficiency gains within the first month
- Built Dashboard Analytics, QC Monitoring, Lab Management, and Production Tracking
Products I've Built
From Scratch
Every product below was ideated, designed, architected, developed, and deployed independently — from concept to real users.
Sawitku.com
Founder & Lead Developer
SaaS platform for digitizing palm oil mill operations — lab management, production monitoring, quality control, real-time alerts, and audit trail.
Smart Grader AI
Founder & AI Product Developer
AI-powered palm fruit grading platform using Computer Vision for harvest quality classification and analytics.
Enaknyakemana.com
Founder & Fullstack Developer
AI-powered tourism recommendation platform with smart destination search and personalized travel suggestions.
SibatakJalanJalan.com
Founder & Fullstack Developer
Digital platform focused on Batak culture, tourism, technology, and local information for North Sumatra — SEO-driven content strategy.
TaromboBatak.com
Founder & Fullstack Developer
Online Batak family genealogy platform with interactive family tree visualization and multi-generation clan management.
BebasBacaKomik.com
Founder & Fullstack Developer
Digital comic platform with automated content collection, membership system, download management, and SEO optimization.
Beyond Writing Code
Search Engine Optimization
Beyond software development, I bring proven SEO expertise — ensuring the products I build are not just functional, but discoverable. I implement SEO strategies on every project, from structured data to Core Web Vitals.
✓ Achieved first-page Google rankings for competitive Indonesian keywords
✓ Implemented JSON-LD structured data across portfolio and client sites
✓ Combined SEO + development strategies to drive growth for 6+ digital products
Cloud Infrastructure & Deployment
Experienced in managing production deployments for 10+ applications across multiple cloud providers — from SSL configuration to monitoring and ongoing maintenance.
✓ Deployed 15+ applications to production across enterprise and independent projects
✓ Managed Firebase & GCP infrastructure serving 50+ daily active users
✓ Maintained production systems with zero critical downtime
What I Bring
to Every Project
Unique Value Proposition
What sets me apart is the breadth and depth of hands-on experience across the full technology stack — from enterprise ERP integrations to AI-powered consumer products:
Enterprise Software · ERP Integration · Artificial Intelligence · Agritech · Mobile Apps · Cloud Infrastructure · SEO · Independent Product Development
I don't just write code. I understand business needs, design scalable system architecture, manage production deployments, and build digital products from idea to real users — with 6+ products launched as a solo founder.
Let's Build Something
Together
Whether you need an enterprise system, a mobile app, an AI-powered platform, or a SaaS product — I can build it.
The 30-minute Strategy Call is free. We'll discuss your idea, assess feasibility, and define a clear path forward — no commitment required.