About Me
Hi, I'm Alfa, a Fullstack AI Engineer based in Jakarta (GMT+7), targeting Singapore remote. For 5+ years I've turned complex business problems into simple, reliable products.
On the backend I work with Kotlin & Java (Spring Boot), Golang, and Node.js: microservices, payment integrations, and platforms that have to stay up. On the frontend I ship full stack products with TypeScript, React, and Next.js.
Lately I've been building AI native systems: agentic LLM workflows, hybrid RAG, and tool calling loops, including Incident Brain in production, which cut root cause diagnosis from hours to minutes. Stack includes PostgreSQL, Redis, Docker, AWS, and observability via Langfuse.
I'm a visual thinker and a fast learner. I sketch systems first with diagrams, Figma, and shared models, then build. That habit is how I moved from analysis into shipping AI without losing the business context.
Outside of engineering: running, films, and coffee. Primary goal is a full time Singapore remote role, though I'm also open to freelance, part time, and contract work when the impact is real.
If that sounds useful, let's talk.
Skill Sets
Experience
Fullstack AI Engineer
Arya Noble (ERHA & DERMIES) · Full time · Jakarta
- Drove end to end architecture for ERHA & DERMIES' clinic POS, spanning front office, pharmacy, inventory, promo/loyalty, accounting, and payments, which processes ~8,000 to 10,000 transactions daily across 100+ branches.
- Owned end to end delivery of the Cashier Receipt Form system (shift/payment reporting, approvals, invoice correction, refunds) across 109 branches and ~400+ cashier accounts.
- Refactored a critically broken promo/voucher engine and overhauled a lossy payment logging pipeline, eliminating 100% of corrupted production data and cutting incident debug time by ~80%.
- Delivered BRI QR/EDC payment integration and owned Self & Advance Payment via Xendit, enabling ~200,000+ monthly transactions across 100+ clinics with full callback handling.
- Built Incident Brain, an AI system that analyzes production errors via hybrid RAG and automatically escalates a synthesized fix to Slack, cutting root cause diagnosis from ~120 minutes to under 10 (12× faster).
System Analyst
Astragraphia IT (Astra Group) · Full time · Hybrid
- Led a squad of 5 engineers from across functions delivering PGN's enterprise CRM & Billing System, working directly with the Tech Lead on architecture, sprints, and delivery.
- Architected integration across 5 core modules and owned end to end delivery of Account Management, underpinning Rp 40+ trillion in annual revenue and 500,000+ subscribers across 19 provinces.
- Owned Functional Specification Design across 15+ stakeholder sessions (data models, DDL, UML, Figma mockups), reaching 100% sign off, zero rework cycles, and ~40% less development ambiguity.
- Delivered PoC presentations to senior PGN stakeholders (accelerating architecture sign off by ~3 weeks) and ensured production readiness with 200+ system integration test scenarios.
Software Engineer
Astragraphia IT (Astra Group) · Full time · Hybrid
- Built a secure user management module with JWT authentication, defined roles, and detailed privilege controls on Spring Boot & Oracle.
- Established a scalable boilerplate architecture adopted by ~10 developers, reducing onboarding ramp time by ~50% and standardizing patterns across the billing platform.
Software Engineer Intern
Astra Life · Internship · Hybrid
- Built parameterized monitoring agents (Spring Boot & Angular) for automated HTTP health checks, DB replication sync, and hardware/log analysis via cron jobs, cutting data load time by 77.5% (~80s → ~18s, validated with JMeter).
- Standardized production deployment via a Deployment Request Form consolidating Linux/SQL scripts into a single artifact, reducing deployment error risk.