Cut the on-premise server PC budget from IDR 70M to IDR 30M (~57% savings) by sizing hardware to actual needs, achieving the same goals without over-provisioning.
Built ChatKora, an AI assistant for querying live operational data (late employees, new member registrations, top customers, daily revenue), using Open WebUI, LiteLLM, and Langfuse, with integrations to Notion, Jurnal, Talenta, and Firebase.
Built Whops, an operations platform covering employee checklists, receiving, waste reports, and stock opname, integrated with Jurnal. Added AI review of operational checklists to reduce fraud.
Optimized tool calling by improving prompts and tool definitions, cutting response time from 3 minutes to 40 seconds (~78% faster).
Cut LLM API cost per chat from ~IDR 7,500 (GPT-5.6 Terra) to ~IDR 1,080 (DeepSeek V4.1 Flash), an ~86% reduction, with the same tasks completed.
Optimized Firestore query for exam attempts (hourly automation) by splitting it into two queries: reads dropped from ~45.6M to ~765K per month (~98%), latency from 19,163 ms to ~38 ms (~504x faster), and cost from ~IDR 242,000 to ~IDR 4,060 per month.
Self-hosted a VPN with Headscale, eliminating recurring subscription fees to external providers.
Delivered all of the above with minimal direction, working side by side with the business owner.
API Integrator
PT Arna Teknologi Peduli (Contract)
Jakarta, Indonesia
Nov 2025 - Jan 2026
Serving as an API Integrator at Bank Rakyat Indonesia (BRI), facilitating successful BRIAPI integrations for major partners including Kopi Kenangan, Polkes Malang, BPR Majalengka, MPSTORE, and PT Cazh.
Backend NodeJS Developer
Berijalan Member of Astra (Project-based)
Yogyakarta, Indonesia
May 2024 - Apr 2025
Developed and maintained RESTful APIs for seva.id automotive marketplace using Node.js and PostgreSQL.
Optimized data processing endpoint, reducing Excel import from 40 minutes to 1 minute.
Collaborated with 8-member cross-functional team using Agile/Scrum methodology.
Web Programmer
Supra Boga Lestari (Contract)
Jakarta, Indonesia
Dec 2023 - Feb 2024
Maintained code for Ranch Market Point of Sales Application.
Created an automation testing tool for the front-end as it doesn't support Cypress or other E2E test frameworks, enabling faster code deployment.
Javascript Developer
Square Gate One (Contract)
Tangerang, Indonesia
Sep 2022 - Sep 2023
Built automated API testing suite using Postman, reducing testing cycle time.
Developed backend features for Point of Sales application using Node.js and MongoDB.
Optimized new cashier PC onboarding process, reducing setup time from 4 hours to 1 hour.
Improved code quality and deployment confidence through comprehensive API test coverage.
Web Developer
Nusantara Card Semesta (Contract)
Bogor, Indonesia
Dec 2021 - Sep 2022
Migrated the company website (ncskurir.com) from WordPress to CodeIgniter 4, developing a full-stack application and delivering the project in 3 months—cutting the original 6-month timeline by 50%.