Backend Engineer · Go · Since 2018
Saptaka
Trihantoro
I design and build microservice systems that move money, stream video, and ship games — Go-first, deployed on AWS & GCP. Most recently leading the hotel connection platform at Rakuten Travel Xchange.
Focus
Payments · Media
Base
Jakarta, ID
Cloud
AWS · GCP
Status
Open to work
@taka-x-code
github.com/taka-x-code
Backend · Go · 8+ yrs
$ whoami
Saptaka Trihantoro — backend engineer, 8 yrs
$ cat experience | head -4
Rakuten Travel Xchange · 2021–2025 · 10,000+ hotels
Ruangguru · 2020–2021 · video transcoding pipeline
Artajasa · 2019–2020 · payment microservices
Aino · 2018–2019 · MRT Jakarta payment infra
$ uptime
8+ years — shipping backend systems since 2018
Eight years, four industries.
Payments, edtech, games and travel distribution — the constants are Go, microservices, and systems that need to be right at scale.
Rakuten Travel Xchange
Software Engineer
Singapore
Part of Rakuten Group- →Led the hotel connection platform serving 10,000+ hotels through third-party APIs.
- →Cut operational costs and improved search speed via database partitioning and query optimization.
- →Built and maintained public APIs for multiple hotel booking distributors.
- →Implemented system monitoring with Prometheus and OpenTelemetry.
- →Restructured databases to reduce storage footprint and query latency.
- →Refactored a JavaScript FastAPI backend into a Go RESTful service.
Ruangguru
Software Engineer
Jakarta, ID
Leading Indonesian EdTech- →Developed REST APIs in Go and Python for the educational platform.
- →Built a video transcoding pipeline in Go serving thousands of concurrent users.
- →Scripted game packaging: Unity3D + VM + Golang + ffmpeg, with size bootstraping via AWS S3.
- →Created C# Unity extensions for game generation and content upload.
- →Built the backend service handling Google Sheets add-on input for game data.
- →Maintained video service and transcoder in Go and Python; deployed services across Kubernetes namespaces.
Artajasa Pembayaran Elektronis
Outsource Junior Programmer → Software Engineer
Yogyakarta, ID
Indonesian Fintech- →Built microservice REST APIs and messaging queues in Go for financial transaction processing.
- →Developed token generator-validator and RSA signature generator-validator services.
- →Built data validator, data routing, and store-and-forward file backup services.
- →Added in-application data caching to improve performance.
- →Dockerized services and supported CI/CD pipelines.
Freelance
Freelance Web Developer
Yogyakarta, ID
- →Contract web development work between full-time roles.
PT Aino Indonesia
Back End Developer
Yogyakarta, ID
Banking settlement & MRT Jakarta- →Built transaction processing applications for middle-end and back-end systems.
- →Delivered settlement systems for BNI, BRI, BCA, and Mandiri (Java).
- →Created the full payment infrastructure for MRT Jakarta in Go — FFS, SDDC, RFClient, RFServer, DB-Processor — using socket and binary payloads.
- →Built the orchestrator routing transactions between channel and payment teams (Unified Payment).
- →Implemented e-parking (on/off-street) and toll payment processing on PostgreSQL.
Telemetry
Prometheus, Grafana, OpenTelemetry — monitoring as a first-class citizen, not an afterthought.
Database Optimization
Partitioning, query tuning, restructuring — 10,000+ hotel scale, lower cost and latency.
Terraform
Infrastructure as code across AWS and GCP for repeatable, reviewable environments.
Languages
8 yrs, Go first
Cloud & Infra
AWS · GCP
Data
Storage & queues
Systems
Microservices
// Databases: PostgreSQL, MySQL, Redis · Queues: RabbitMQ, Kafka · Tooling: Git, Jenkins, Terraform, Prometheus
I build backend systems that quietly carry the hard parts — payments, video, games, bookings.
Backend engineer since 2018. Started in Java, found Go along the way, and never looked back. I design microservice systems focused on content platforms — video streaming delivery and game delivery — using Go, C# and cloud services on AWS and GCP.
The through-line of my career is transactional scale: settlement systems for Indonesia's biggest banks, payment infrastructure for MRT Jakarta, a video transcoding pipeline for millions of students, and a hotel platform connecting 10,000+ properties.
When it's not about throughput, it's about observability — Prometheus, OpenTelemetry, and making failures visible before users feel them.
8+
Years backend
10K+
Hotels connected
6
Companies
Go
Main language
Current focus
- → Go microservices & distributed systems
- → Database optimization at scale
- → Telemetry & production observability
- → Infrastructure as code (Terraform)
Universitas Negeri Yogyakarta
Bachelor's degree, Informatics Engineering Education
2012 – 2018 · Yogyakarta, Indonesia
Education-focused computer science — how to build systems and how to teach them. The same clarity applies to writing code people can maintain.
AI Agents with Claude 3 API in Python
Udemy · Jul 2025
Prompt Engineering Basics
IBM · Jul 2025
Introduction to AI
IBM · Jun 2025
Introduction to Data Engineering
IBM · Dec 2024
Data Analytics
IBM · Oct 2024
Business Requirements Documentation
Udemy · Oct 2024
Foundations: Data, Data, Everywhere
Google · Sep 2024
Cloud Computing
IBM · Sep 2024
Software Engineering
IBM · Sep 2024
Clean & Scalable CSS Architecture
Udemy · Aug 2024
Mastering Go Programming
Udemy · Jan 2024
Python for Data Science, AI & Development
IBM
Introduction to Containers with Docker, Kubernetes & OpenShift
IBM
Application Security for Developers and DevOps Professionals
IBM
Find me where the code lives.
GitHub
taka-x-code
Side projects, experiments, and the plumbing behind distributed systems — Go, TypeScript, infra-as-code.
in/saptaka-trihantoro
Full work history, recommendations, and the occasional post about backend engineering.
takaxcode.com
personal site
Where this portfolio lives — and where the longer-form writing and project notes go.