Open to remote roles worldwide · GMT+8

Aldy Satria Gumilar
Full Stack Software Engineer

Backend-leaning · Go · PHP · Node.js · TypeScript

I build high-performance, scalable systems — and engineer with AI agents, not just use them. Turning complex, ambiguous problems into elegant, well-tested solutions.

📍 Banjarbaru, Indonesia (GMT+8) 🗣 English · Professional working 🕘 Overlaps APAC / EU / US 🤝 Remote & freelance
// about

Engineering that scales

I'm a Full Stack Software Engineer focused on the backend — designing APIs, microservices, and data-heavy pipelines that stay fast under load. I care about clean architecture (SOLID, repository & service-layer patterns), performance optimization, and shipping maintainable code. I currently build enterprise solutions at Celerates, and I work async-first with teams across time zones.

⚡ Performance optimization 🧱 Clean architecture · SOLID 🔌 REST · gRPC · API gateways 📊 Agile / Scrum delivery 👥 Mentoring
// skills

Tech stack

🧩 Languages

GoPHPNode.js TypeScriptPythonDart

⚙️ Frameworks

GinLaravelExpress Next.jsReactFlutterTailwind

🗄️ Data & Infra

PostgreSQLMySQLSupabasegRPC KrakenDDockerVPSCI/CD

📈 Observability & BI

GrafanaLokiPower BI TableauSelf-hosted

🏛️ Architecture

MicroservicesRESTWorker queues SOLIDDB optimization
// ai engineering

Engineering with AI & LLMs

I don't just use AI assistants — I treat LLMs as a programmable layer of the stack and study how to drive them reliably. Actively leveling up on:

  • Prompt engineering for code — task decomposition, few-shot & schema-constrained structured outputs, eval-driven prompting, and reducing hallucination on programming tasks.
  • Agentic workflows — multi-step agents with tool use, planning/execution loops, and verification gates; orchestrating parallel sub-agents for research, review, and refactoring.
  • AI-assisted development in practice — daily work with Claude Code and agentic harnesses to plan, generate, review, and test code under TDD and code-review loops.
  • LLM application patterns — the Claude API (Messages, tool use, streaming, prompt caching), RAG, cost-aware model routing, and MCP-style tool servers.

🎯 Goal: ship production software where AI agents handle a large share of implementation under tight, human-defined specs, tests, and review gates — faster, without sacrificing quality.

// projects

Featured work

Go

High-Performance CSV → PostgreSQL Importer

Concurrent Go importer handling 1M+ records with optimized PostgreSQL bulk-insert and worker pooling for throughput.

View repo →
💸GoPHP

J&T Cashback Service

Cashback upload & processing split across a Go ingestion worker and a PHP application layer — a production-style microservice pairing.

View repo →
🚪Node.js

KrakenD API Gateway Playground

Monorepo exploring API gateway patterns — routing, aggregation, and ingress configuration with KrakenD.

View repo →
📨GogRPC

gRPC Subscription Worker

File-processing worker using gRPC for inter-service communication in a subscription pipeline.

View repo →
📚Flutter

Bbook — Educational Mobile App

Cross-platform Flutter app delivering student study material on the pre-historic age.

View repo →
📖Go

Go Cheat Sheet

A curated, hand-crafted Golang reference of practical snippets for fast lookup.

View repo →
// enterprise & client work

Production systems shipped

Delivered for businesses and government agencies. Source is private (client / NDA), so these are described by scope and impact.

🏥ERP

Medical Supply Management System

A comprehensive ERP covering the full medical-supply lifecycle — repair workshops, imports, purchase orders, multi-branch sales, document-oriented records, and shipping & delivery orders — fronted by a public catalogue website. Documents and backups run on a self-hosted Synology NAS.

LaravelSynology NASMySQL
⛑️Industrial

Industrial Safety Calculation App

A safety-calculation engine for mining & petrochemical operations, codifying domain formulas and compliance logic. Built on Express + Supabase, deployed to a hand-tuned VPS with object storage, and observed end-to-end via Grafana + Loki.

Express.jsSupabaseVPSGrafanaLokiOSS
🛒E-commerce

Online Shop + Payment Gateway

A Laravel e-commerce store with integrated payment-gateway checkout, cart, and order-fulfillment flow.

LaravelPayment Gateway
🏛️GovTech

Government Open-Data Platform

Dataset sharing and BI dashboard integration for Badan Pangan Nasional (National Food Agency) and Badan Kepegawaian Negara (National Civil Service Agency) — surfacing national datasets through Power BI and Tableau.

Power BITableauData Integration
Compliance

Halal Certification Tracker

A Laravel application tracking the halal-certification process with document storage and a full audit trail.

Laravel
📦Operations

Inventory Management System

Laravel-based stock control, item movements, and multi-location reporting.

Laravel
👥HR

HRIS

A Laravel Human Resource Information System managing employee records and core HR operations.

Laravel
// contact

Let's build something that scales

Open to remote opportunities worldwide and freelance projects. The fastest way to reach me is email or LinkedIn.