Backend & Systems Engineer
Ahmad Husein
Hambali
Backend Engineer experienced in Node.js and TypeScript. I design reliable systems, make thoughtful architectural decisions, and write maintainable code that works in production.
About
A bit about me
I specialize in building scalable backend systems using Node.js, TypeScript, and PostgreSQL, with over five years of experience in production environments. My focus is on reliability, long-term maintainability, and architectural clarity.
I approach software as a system of constraints. I design with failure scenarios, edge cases, and future evolution in mind while prioritizing stability over quick fixes. This mindset has consistently reduced production defects and improved long-term maintainability.
I value clean abstractions, explicit trade-offs, and thoughtful testing. I aim to deliver systems that remain understandable and adaptable long after their initial release.
Core Strengths
- Backend Development — Node.js, TypeScript, Express.js
- System Design — API architecture, Database design, Scalable systems
- Database — PostgreSQL, Redis, Query optimization, Data modeling
- DevOps — Docker, Git, CI/CD workflows
Projects
Selected Work
A selection of projects I've built — from freelance work to enterprise systems.
Experience
Professional Experience
Backend-focused roles with product-minded delivery.
Jan 2024 - Dec 2025
Backend Engineer
NoscAi GmbH
Hamburg, Germany - Remote - 2 Years
- Built and maintained Node.js (Express) backend services for financial systems processing ~1-5k invoices/month.
- Implemented invoice correction, billing liquidation integrations, and payment workflows with regulatory compliance requirements.
- Partnered with the CTO on architecture decisions and owned technical design for feature delivery and production issue resolution.
- Led code reviews and strengthened test coverage to reduce regressions and uphold code quality.
- Delivered incrementally in a cross-functional team, with regular releases and production support.
Sep 2021 - Jan 2024
Full Stack Developer
CV. Indokoding Sukses Makmur
Yogyakarta, Indonesia - On-site - 2 Years 5 Months
- Built and maintained BookYourGP, a Laravel-based clinical oversight platform for NHS GP surgeries (EMIS & SystmOne integrations).
- Optimized backend performance and database queries, reducing load times by 60–75% on complex requests.
- Worked in a small team (2 devs), collaborating directly with the CEO and client stakeholders to translate requirements into technical solutions.
Jun 2020 - Jul 2021
Web Developer
PT. Bama Berita Sarana Televisi (BBS TV)
Surabaya, Indonesia - On-site - 1 Year 2 Months
- Maintained and improved a WordPress site to ensure stability, compatibility, and reliable production operation.
- Built a CodeIgniter-based online competition system (registration, submissions, admin tracking) to streamline operations and follow-ups.
Jul 2018 - Jun 2019
Intern Software Engineer
PT. Hyperdata Solusindo Mandiri
Tangerang, Indonesia - On-site - 1 Year
- Developed and maintained backend logic for web applications using PHP (CodeIgniter).
- Built a client website from scratch using CodeIgniter and PostgreSQL for data storage.
Highlights
Backend-focused roles with product-minded delivery.
- Scalable backend systems and integrations
- Performance tuning and query optimization
- Production readiness and incident response
- Clear communication with stakeholders
Available for backend roles with strong engineering culture.
Peer Recognition
What Colleagues Say
"I had the privilege of leading Husein at Nosc AI, where he served as a Backend Engineer. Husein is the kind of engineer you want in your corner when building complex, high-performance systems. He built the billing, invoicing system and many core functionalities which were crucial for us. He is a fantastic asset to any engineering team that values code quality and integrity."