Muhammad Septian
Senior backend engineer in Jakarta. For eight years I've built backend services, mostly in Go, that move money and parcels: payment integrations with Indonesia's banks, and route optimization for thousands of couriers a day.
Currently a Senior Backend Developer at Ojire. In my own time I build open-source tools for LLMs.
Projects
Things I've built outside my day job, mostly in Go.
loong.lat
2026Built for Meta Hackathon 2026
Courier platform for small senders that groups parcels into the cheapest, shortest, or fastest route and prices each option against sending separately.
Go, TypeScript, Modal, Kafka, PostgreSQL, Meta Muse
sparks
2026
A backend that turns any LLM into typed decisions (yes/no, choice, score) from a single forward pass, with no generated text to parse.
Go, Python, Docker, LLM
Qwen OAuth plugin for the OpenCode coding agent, with multi-account rotation and OpenAI Responses ↔ Chat Completions translation.
TypeScript, Bun, OAuth
snap-aspi-go
2025
Go SDK for Indonesia's SNAP payment APIs (ASPI), covering virtual accounts, QR MPM, transfers, and direct debit, with a dedicated BCA client.
Go, SNAP, Payments
jasmine
2024
In-memory nearest-point finder built on a K-D tree, with gRPC and REST APIs, TTL, GeoJSON export, and OSRM integration.
Go, gRPC, REST, OSRM
Experience
– Present
Senior Backend Developer
- Led integration of Indonesia's National Standard Open API (SNAP) across multiple national banks and payment channels.
- Contributed to PCI DSS compliance initiatives for secure handling of payment card data.
- Defined the core technology stack and scalable code design patterns behind a robust system architecture.
–
Technology Specialist
- Built and maintained a Go-based route optimization engine that calculates efficient delivery routes for thousands of couriers daily.
- Optimized routing algorithms to cut route generation time and operational fuel costs.
- Integrated the routing engine into the core logistics ecosystem with cross-functional teams.
- Tuned backend and API performance to handle traffic surges during peak delivery seasons.
–
Full Stack Engineer
Investree
- Developed backend features for a peer-to-peer lending platform in PHP.
- Built third-party API integrations for financial verification and transaction processing.
–
Software Engineer
Asani
- Built the backend from scratch in Go over three years, supporting the product from its early stage.
- Designed and managed server infrastructure with Docker Swarm on Ubuntu Server.
- Developed third-party API integrations to extend core functionality.
Education
Universitas Komputer Indonesia
Bachelor of Informatics Engineering, 2018
Certifications
- Go (Intermediate), HackerRank2025
- SQL (Intermediate), HackerRank2023
- SQL (Basic), HackerRank2023
- Go (Basic), HackerRank2022