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Ahmed Nizhan Haikal · Jakarta, Indonesia

I build the systems that let products keep their promises.

Backend and full-stack engineer focused on dependable APIs, event-driven services, and data-heavy products.

Ahmed Nizhan Haikal

Backend & Full-Stack Developer

Jakarta, Indonesia

01

A record of shipping

Experience built around systems that have to work.

  1. May 2026 - Present

    Sagara Technology

    Fullstack Developer (Outsource at Treffix)

    • Scaled an end-to-end logistics platform to process 5,000+ daily active orders, engineering high-throughput backend services with ElysiaJS/Bun and a React 19 (TanStack Start) frontend in a pnpm monorepo.
    • Boosted routing efficiency and delivery precision by extracting historical tracking data to dynamically calculate GraphHopper via-points between scheduled stops.
  2. Feb 2026 - Apr 2026

    K-Appraisal

    Software Developer

    • Architected scalable enterprise microservices across core business domains using ASP.NET Core and React, decoupling monolithic workflows into maintainable distributed services.
    • Decoupled high-volume asynchronous tasks by implementing event-driven message queuing with RabbitMQ, preventing workflow bottlenecks and ensuring eventual consistency across services.
  3. Mar 2025 - Dec 2025

    Apple Developer Academy

    Apple Platform Developer

    • Shipped production-grade native iOS/iPadOS applications utilizing Swift, SwiftUI, and SwiftData, prioritizing reactive UIs, data persistence, and fluid user interactions.
    • Drove end-to-end product delivery cycles within an agile environment, iterating from rapid interactive prototyping and user research to final app builds.
  4. Sep 2024 - Dec 2024

    Alto Network

    Backend Developer

    • Engineered robust RESTful backend services and reporting systems with Java Spring Boot to facilitate secure, high-integrity financial network data processing.
    • Accelerated developer onboarding and feature delivery by creating standardized ERD and DFD technical documentation across complex integration touchpoints.
  5. Feb 2024 - Jul 2024

    Bakrie Center Foundation

    Software Engineer

    • Led technical project execution and team delivery as PIC, coordinating sprint milestones, conducting code reviews, and aligning business requirements with engineering output.
    • Architected normalized MySQL database schemas to secure mission-critical data models and minimize transactional redundancy.

02

Independent work

Selected projects, kept close to the problem.

01

Freelance Full-Stack Developer

Medical Visual Question Answering

Developed a medical visual question answering system using TensorFlow. Implemented a custom image upload interface and integrated with a medical knowledge base API to provide accurate answers to medical questions.

  • Python
  • TensorFlow
  • Medical AI
  • Fullstack Development

02

Freelance iOS Developer

Contraction Timer iOS App

Designed and developed a native iOS utility app with a highly reactive UI for calculating contraction frequency. Features include custom tab views and intuitive swipe actions for editing and deleting records.

  • SwiftUI
  • Reactive UI
  • Mobile Development
  • UX/UI

03

Tools I reach for

A practical stack, shaped by the work.

Backend & API Development

Architecting scalable microservices, RESTful APIs, and event-driven systems.

  • C#
  • .NET
  • Node.js
  • Java
  • Spring Boot
  • Python
  • FastAPI
  • Go

Frontend & Mobile

Building reactive web interfaces and native iOS applications with custom UI components.

  • React
  • TypeScript
  • TanStack
  • Tailwind CSS
  • Swift
  • SwiftUI
  • SwiftData

Database & Architecture

Designing normalized schemas and managing data flow for complex applications.

  • PostgreSQL
  • MySQL
  • Prisma
  • Supabase
  • RabbitMQ
  • Microservices

04

Background

Bachelor of Computer Science

Universitas Pembangunan Nasional Veteran Jakarta, Jakarta, Indonesia

Aug 2021 - Sep 2025 · GPA 3.87/4.0

Achievement · Nov 2022

Gemastik Finalist

Top 10 nationally in Kemendikbudristek's Gemastik IT competition.

ANKERSAL (Bootstrap, PHP)