Hello, I'm Ahmad Fadilah

Building Systems that

Senior Backend Developer & Tech Enthusiast

Specialized in backend application development with Golang, PostgreSQL, and Redis. 5+ years of experience building microservices, REST APIs, and cloud-native solutions. I believe that good technology solves real problems in elegant and scalable ways.

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About

I Build Your Digital Future

As a passionate Backend Developer, I am dedicated to creating robust and efficient digital solutions, and committed to continuous development.

Designing and Implementing Optimal Program Systems

My main focus is on backend development, with deep expertise in databases, scripting, and system architecture. I enjoy solving complex problems, finding innovative solutions, and building solid foundations for your applications. I always strive to write clean, maintainable code that follows best development principles, ensuring optimal scalability and performance. Through continuous learning, I am dedicated to delivering solutions that are not only functional, but also fast and efficient.

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Microservices Architecture

Designing and developing modular, scalable, and maintainable microservices systems. Using domain-driven design to ensure each service has clear responsibilities and can evolve independently.

High-Performance APIs

Building high-performance RESTful APIs and gRPC services using Golang. Optimized to handle thousands of requests per second with minimal latency and efficient resource usage.

Cloud-Native Solutions

Developing cloud-native applications with containerization (Docker), orchestration (Kubernetes), and cloud services (AWS/GCP). Ensuring applications can be deployed and scaled automatically.

Database & Caching Strategy

Designing optimal database architecture with PostgreSQL for data persistence and Redis for caching. Implementing connection pooling, query optimization, and data consistency patterns.

Event-Driven Architecture

Building event-driven systems with message brokers (RabbitMQ/Kafka) for asynchronous communication between services. Ensuring data consistency and fault tolerance in distributed systems.

Security & Authentication

Implementing enterprise-grade security systems with JWT, OAuth2, and role-based access control (RBAC). Data encryption, rate limiting, and real-time security threat monitoring.

DevOps & CI/CD

Setting up automated CI/CD pipelines with testing, building, and deployment. Modern monitoring and logging tools for observability and fast troubleshooting.

Performance Optimization

Optimizing application performance with profiling, caching strategies, and load balancing. Implementing circuit breakers, retry mechanisms, and graceful degradation for high reliability.

My Portfolio

Latest Projects

Check out my portfolio and some projects that I have worked on

Showcasing 6 latest portfolio projects

Backend Golang Developer Freelance Project

Langganan Apps - SME & Local Trade Digitalization

Langganan Apps is an innovative platform designed to empower SMEs and local merchants by connecting them directly to customers within one area. Our main focus is to simplify the daily shopping process for loyal customers while driving merchant digitalization for significant rural economic growth.

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Backend Golang Developer Capstone Project Alterra Academy

DigiHouse - Revolutionary Digital Warehouse Management Platform

DigiHouse is an innovative platform that bridges warehouse owners with parties seeking warehouses for efficient goods storage. Designed for companies and organizations, DigiHouse simplifies the search for available warehouses based on capacity and location, offering flexible solutions for modern inventory management needs.

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Backend Golang Developer PT Nusantara Sukses Teknologi

Payment Service - Multi-Provider Payment Integration

Centralized payment platform that connects various client companies with diverse payment providers, both for cash-in and cash-out transactions. This solution is designed to simplify cross-entity and provider payment management efficiently.

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Backend Golang Developer PT Aplikasi Konstruksi Global

Scafol - Digital Construction Project Management Solution

Scafol is an innovative web platform designed to manage and monitor the entire construction project development process. This application simplifies coordination and ensures full visibility of every activity carried out by contractors, improving operational efficiency.

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UX Design Jane Doe

UX Case Study for Agriculture App

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Web Design, Branding Johnathon Doe

Event App Case Study

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My Resume

My Career & Learning Journey

Explore my educational background, training, and work experience, from school to my latest contributions in the professional world.

Scroll down for more details about my journey.

Education Experience

August 2023 - December 2023

100% Mastering Golang Programming - Alterra Academy

Mastered algorithms, problem-solving, and project development (mini & capstone: Digihouse - Digital Warehouse) through team collaboration with UI/UX, mobile, web, and QA teams.

Key Achievements:

Developed capstone project Digihouse - Digital Warehouse Management System
Mastered advanced Golang concepts and best practices
Successfully collaborated with multi-discipline teams (UI/UX, Mobile, Web, QA)

Technologies: Golang, Algorithms, Problem Solving, REST API, Database Design, Team Collaboration, Project Management

June 2020 - September 2020

Dicoding Online Course

Learned the fundamentals of Kotlin and Dart programming, as well as Android and Flutter application development for beginners.

Key Achievements:

Completed Android and Flutter course
Developed simple mobile application as final project
Understood cross-platform development concepts

Technologies: Kotlin, Dart, Android Development, Flutter, Mobile App Development, UI/UX Basics

December 2019 - June 2020

Bootcamp Full Stack Developer - Enigmacamp

Deepened understanding of algorithms, data structures, Golang fundamentals, building REST APIs connected to databases, Kotlin & Flutter basics, and Android application development from APIs.

Key Achievements:

Mastered Golang fundamentals and backend development concepts
Built REST API with database integration
Developed Android application integrated with API

Technologies: Golang, Algorithms, Data Structures, REST API, Database, Kotlin, Flutter, Android, Git

July 2019 - August 2019

Junior Graphic Designer Training - Digital Talent Scholarship (Kominfo)

Learned fundamental principles of communication & graphic design, design software usage, and creation of logos, posters, infographics, and packaging design based on case studies.

Key Achievements:

Created graphic design portfolio with 5+ works
Mastered Adobe Creative Suite software
Understood visual communication principles and branding

Technologies: Adobe Photoshop, Adobe Illustrator, Graphic Design, Logo Design, Poster Design, Infographics, Packaging Design

April 2019

Junior Technical Support Certification - National ICT Center

Understanding computer hardware & software, performing installations (assembly, OS), and analyzing common installation problems.

Key Achievements:

Passed certification BNSP
Mastered hardware and software troubleshooting
Understood operating systems and computer installation

Technologies: Hardware, Software, Computer Assembly, OS Installation, Troubleshooting, Technical Support

January 2018 - March 2018

Web Developer Training - BBPLK Bekasi

Learned HTML, CSS, created static & responsive websites, and built CRUD applications with native PHP.

Key Achievements:

Built personal portfolio website
Developed simple CRUD application
Mastered responsive web design

Technologies: HTML, CSS, PHP, MySQL, Responsive Design, CRUD Operations, Web Development

February 2015 - March 2015

Junior Web Programming Training - BPPTIK Cikarang

Learned the basics of HTML, CSS, PHP, and passed LSP certification in 5 days of intensive training.

Key Achievements:

Passed LSP certification
Mastered web programming basics
Completed intensive 5-day training

Technologies: HTML, CSS, PHP, Web Programming, LSP Certification

2010 - 2013

SMK Puja Bangsa Cikarang

Graduate of automotive major with strong interest in IT; built forum websites and blogs during study period.

Key Achievements:

Built personal forum and blog websites
Developed interest in IT field since school
Graduated with good grades in automotive major

Technologies: HTML, CSS, Basic Programming, Web Development, Blog Development, Forum Development

April 2025 - Present

PT Fintek Karya Nusantara (LinkAja)

Senior Backend Developer - Leading exploration and implementation of API testing automation tools (Postman, Apidog) and web testing (Katalon, Selenium), and leading the core application rewrite process from Java to Golang for improved performance and system scalability.

Key Achievements:

Core application rewrite from Java to Golang
Implemented automation testing reducing manual testing effort by 70%
Improved application performance by 45% through Golang architecture optimization

Technologies: Golang, Java, Postman, Apidog, Katalon, Selenium, Docker, Git

April 2024 - April 2025

PT Lion Super Indo

Backend Golang Developer - Implemented distributed tracing with Sentry, integrated Gosend for grocery delivery, launched loyalty program features, and collaborated with mobile & web teams for innovative features.

Key Achievements:

Integrated Gosend API improving grocery delivery efficiency by 35%
Launched loyalty program increasing customer retention by 25%
Implemented distributed tracing reducing debugging time by 60%

Technologies: Golang, PostgreSQL, Redis, Sentry, Docker, Git, REST API, Microservices

January 2020 - December 2023

PT Fintek Karya Nusantara (LinkAja)

Backend Golang Developer - Developed QR code transactions, integrated services with internal & external APIs, fixed bugs, and performed unit testing and testing with QA & partners.

Key Achievements:

Developed QR code payment system handling 1M+ transactions per month
Integrated 10+ partner APIs with 99.8% success rate
Reduced production bugs by 80% through comprehensive unit testing implementation

Technologies: Golang, PostgreSQL, Redis, Docker, Git, REST API, gRPC, Unit Testing

November 2021 - March 2022

PT Nusantara Sukses Teknologi (Nusatek)

Backend Golang Developer (Freelance) - Built payment systems integrated with Xendit & Xfers (Virtual Account, E-wallet, Cash In/Out), using RabbitMQ & API for data communication.

Key Achievements:

Built payment gateway handling IDR 2M+ transactions per month
Integrated multi-channel payments (VA, E-wallet, Cash) with 99.9% uptime
Implemented real-time notification system using RabbitMQ

Technologies: Golang, PostgreSQL, RabbitMQ, Xendit API, REST API, Git, Docker

September 2020 - November 2020

PT Aplikasi Konstruksi Global (Scafol)

Backend Golang Developer (Internship) - Created REST API prototypes, integrated & built construction project management REST APIs, fixed bugs, and used Git & integrated with Dropbox API.

Key Achievements:

Built construction project management API prototype from scratch
Integrated Dropbox API for document management system
Completed 15+ bug fixes and feature requests during internship

Technologies: Golang, MySQL, REST API, Dropbox API, Git, Postman

August 2018 - January 2019

PT Mulia Glass Safety

Packing Operator - Responsible for packing glass into wooden boxes, maintaining quality, ensuring box conditions, and preparing packing materials & equipment.

July 2016 - June 2017

PT Asahi Best Base

Quality Control Inspector - Conducted cable checks on panels, installed fuses, and ensured product quality met standards.

November 2015 - January 2016

PT Mitra Integrasi Informatika

Field Engineer (Internship) - Supervised testing & implementation of ORT 1P project at CIMB Niaga bank, reported field issues, and performed fixes according to headquarters’ instructions.

October 2013 - August 2015

PT Sari Takagi Elok Produk

Production Operator - Responsible for vehicle spare parts production processes, loading and unloading molds to stamping machines, and ensuring quality met standards.

Competence

Why Choose Me?

With an intensive training background as a software developer, I have successfully implemented this knowledge in various real projects. My dedication to continuous learning and ability to adapt to technological innovations ensures significant contributions to professional success. Here are the main technologies and tools that I master and am ready to apply for your needs:

🚀 Tech Stack