Hi, I’m
Subhan Nizar
Senior Fullstack Engineer & Backend Specialist with 9+ years of experience delivering scalable SaaS and government systems. I build reliable backends with Python (FastAPI, Flask) and Node.js (NestJS), and modern frontends with React/Next.js. I also use workflow automation and AI-assisted software development—including agentic development workflows—to accelerate delivery while keeping code quality high.
- Delivered mission-critical systems for Indonesian government.
- Automated healthcare data workflows using Apache Airflow and Python.
- Optimized PostgreSQL reporting with complex JSON aggregation.
- Applied AI-assisted workflows for faster implementation, clearer documentation, and more effective code reviews.
About
Senior Fullstack Engineer focused on backend engineering, workflow automation, and building reliable products for SaaS and public sector organizations.
I build scalable APIs, data-intensive services, and internal tools with a strong emphasis on maintainability, performance, and clear delivery practices.
I use AI-assisted software development as a practical engineering capability: to accelerate implementation, improve code quality, generate and maintain documentation, validate system design options, and support debugging and troubleshooting. The goal is simple—help teams move faster without compromising reliability.
Skills
Core stack for building scalable SaaS and government systems, plus AI-assisted workflows that improve delivery speed and code quality.
Core Stack
- Python
- FastAPI
- Flask
- Node.js
- NestJS
- PostgreSQL
- React
- Next.js
- Vue 3
- Nuxt.js
- Apache Airflow
- n8n
- Docker
Backend
8 technologies
- Python
- FastAPI
- Flask
- Node.js
- NestJS
- SQLAlchemy
- Celery
- GraphQL
Frontend
8 technologies
- React
- Next.js
- Vue.js
- Vue 3
- Nuxt.js
- TypeScript
- Tailwind CSS
- Vite
Database
5 technologies
- PostgreSQL
- MySQL
- Redis
- MariaDB
- MongoDB
Data Engineering
3 technologies
- Apache Airflow
- Pandas
- Dask
DevOps
4 technologies
- Docker
- Nginx
- Git
- GitLab CI/CD
Automation
1 technologies
- n8n
AI & Developer Productivity
7 technologies
- AI-Assisted Software Development
- Agentic Development Workflows
- Prompt Engineering
- LLM Workflow Automation
- AI-powered Documentation
- AI-assisted Code Review
- AI-assisted Architecture Design
Experience
Recent roles and responsibilities across SaaS, public sector systems, and data automation—using AI-assisted workflows where it improves delivery and quality.
Fullstack Engineer · Flowclass
Aug 2024 – Oct 2025- Designed and developed scalable REST APIs using NestJS and PostgreSQL.
- Built frontend modules using React, Next.js, and TypeScript.
- Implemented workflow automation for enrollment and payment reminders using n8n.
- Optimized reporting performance with PostgreSQL query and JSON aggregation improvements.
- Used AI-assisted workflows to accelerate implementation and keep documentation and reviews consistent.
Independent Fullstack Consultant · Self-employed
Aug 2023 – Aug 2024- Delivered custom web applications and automation systems for public and private sector clients.
- Built and maintained APIs, dashboards, and workflow automation solutions.
- Translated business requirements into scalable software products and deployments.
- Applied AI-assisted workflows for faster iteration, troubleshooting, and documentation maintenance.
Fullstack Engineer · Quokka HR
2021 – Jul 2023- Led migration of enterprise frontend architecture from Vue 2 to Vue 3.
- Developed and maintained APIs and frontend applications.
- Built administrative back-office systems and led frontend code reviews.
- Used AI-assisted workflows to support refactoring, code review, and issue investigation.
Fullstack Engineer · ITEC Mataram
2017 – 2021- Developed government information systems and internal business applications.
- Designed databases and application architectures for multiple projects.
- Built and maintained Point-of-Sale (POS) systems and mentored students.
- Used AI-assisted workflows to speed up debugging, documentation, and implementation planning.
Selected Projects
A curated set of projects from SaaS, public sector systems, and data automation work.
FlowClass — Education Management Platform
Enrollment management with recurring billing, invoicing workflows, prerequisites validation, and automated notifications/reminders. AI-assisted workflows were used to improve iteration speed, documentation quality, and code review throughput.
Ministry of Health — BPJS Data Automation
Automated healthcare data ingestion/cleansing with orchestrated pipelines for large datasets, improving data quality and reducing manual processing. AI-assisted workflows helped with troubleshooting, documentation, and data validation logic iteration.
Employee & Attendance System — Bima City Government
Integrated employee management, attendance devices, and secure data exchange (E‑Kinerja), including deployment, maintenance, and scaling. AI-assisted workflows supported problem solving and documentation for integrations and edge cases.
Ludes.in — Point of Sales Platform
Backend services and APIs for inventory & transaction management for SMEs, including testing and code review process improvements. AI-assisted workflows helped speed up implementation and review cycles.
Quokka HR — Frontend Migration (Vue 2 → Vue 3)
Led enterprise frontend architecture migration, improved maintainability, and mentored team members through reviews and collaboration. AI-assisted workflows supported refactoring, review, and documentation updates.
Ribath Al Musthofa — Foundation Website
ViewFoundation website highlighting free education, Qur'an memorization, and character building for the community.
Let's talk
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