Building Scalable Systems.
Writing Efficient Logic.
Hi, I'm Akhmad Fauzi — also known as Geats. A Backend Developer and QA Analyst who builds scalable systems with Nest.js and PHP (Laravel), while ensuring their reliability through comprehensive API testing, security assessment, and automation testing. Two sides of one vision: systems that don't just run — but are provably correct.
Freelance Services
End-to-end services tailored to your product needs — from scalable web systems to high-performance mobile apps.
Full-Stack Web Development
Building custom web systems, ERP, and dashboards end-to-end and release-ready using the Laravel & PHP ecosystem.
Mobile App Development
Development of responsive, high-performance cross-platform mobile applications using Flutter & Dart.
Tech-Task & Project Consultation
Web/mobile programming task completion, bug fixing, API integration, and system architecture consultation across various tech stacks.
Tooling & Expertise
Technologies I master and use daily to build reliable systems.
In-depth analysis of system requirements, ensuring quality through structured testing, and strategically leveraging AI to accelerate the development workflow.
Cross-platform mobile apps from a single codebase — responsive UIs and high performance, powered by Flutter & Dart.
Selected Work
Projects that reflect my technical ability and understanding of system architecture.
Finance Workspace API
Multi-workspace finance management backend with strict per-user data isolation and dynamic PDF-format reports.
- Data isolation per workspace tenant
- Atomic transactions for data integrity
- Dynamic PDF report generation
- Swagger API documentation
Papanclip
Live DemoAn enterprise Trello-clone project management platform with real-time sync, granular role management, and OAuth 2.0 authentication. Live and actively used.
- Real-time sync via WebSocket
- Role-Based Access Control (RBAC)
- OAuth 2.0 authentication flow
- Multi-board, multi-member workspace
EasyKan
An automated payroll system that integrates PDF generation and a document delivery workflow via the Microsoft Graph API.
- Automated payslip PDF generation
- Publish & send email workflow
- Microsoft Graph API integration
- Multi-period payroll management
Career Track Record
The professional journey that shaped my technical and analytical perspective.
Designed and built the platform's core backend infrastructure — from database schema design and REST API implementation to managing deployment to the production environment. Implemented a strong security layer covering authentication, role-based authorization, and protection against common web application vulnerabilities.
Designed and implemented an automation testing framework using OpenClaw combined with a ChatGPT-4o agent to accelerate the testing cycle. Responsible for functional testing, regression, and system validation before every production release.
Developed end-to-end custom web applications for clients across various industries using PHP (Laravel). I take on full-stack web projects with Laravel, cross-platform mobile app development with Flutter, and a variety of software development tasks tailored to client needs — handling the entire lifecycle from requirement gathering and architecture design to development, deployment, and client handover.
Performed manual testing, regression, and daily health checks on production applications. Designed structured test cases, logged and managed bugs systematically in the issue tracker, and collaborated actively with the developer team to ensure efficient and timely defect resolution.
Developed and maintained the company's internal BPJS dashboard using PHP & Laravel, including membership data integration and dynamic reporting. Performed regular web security penetration testing using Burp Suite to identify and close security gaps in production applications.
Designed the ERD and database schema, developed the backend of internal systems, and performed functional testing of the company's web applications.
Let's Collaborate
Have an interesting project or job opportunity? I'm always open to a discussion.