~ / irfanguvian — portfolio — dark

irfan@backend:~$whoami --verbose

Backend systems that
survive real traffic.

I design and ship backend systems that survive real traffic — livestream auctions, fintech, document AI, smart-city platforms. Five years in, I've architected event-driven ML backends, cut infra costs 80%, improved API performance 36%, and kept uptime through peak events.

Transactions processed

Livestream auction platform · DEALDULU

Concurrent users served

Real-time systems at scale

Smart-city residents

Facility booking · OneSmile

Infra cost reduction

20+ servers merged into one · Tribesocial

01Currently shipping

Live

Native Node.js migration at Sinar Mas Land

Leading the division's migration from low-code to a native Node.js architecture — advising ~10 engineers across 3 teams and rolling out the standard NestJS + Prisma + Biome + TypeScript boilerplate now adopted across internal teams and an external contractor org.

Stack

TypeScriptNestJSPrismaBiomeAzure Blob

02Experience

5 years of shipping — livestream auctions, fintech, smart cities, document AI.

Sep 2025 — Present

Sinar Mas Land

Application Development Specialist

Leading SEA property developer80% setup-time reduction · 80% smaller asset payloads

Lead the division's strategic migration from low-code to a native Node.js architecture — standing technical advisor to ~10 engineers across 3 teams, influencing architectural decisions on cross-team initiatives.
Architected the division's standard backend boilerplate (NestJS + Prisma + Biome + TypeScript) — adopted by 3 internal teams and an external contractor org delivering 3 separate projects, cutting new-project setup from ~1 sprint to ~1 day (~80%).
Engineered an Azure Blob file uploader + automated WebP pipeline — zero failure rates on 100MB+ transfers and 80% smaller asset payloads.

NestJSPrismaTypeScriptBiomeAzure BlobDocker

Sep 2024 — Sep 2025

Momofin

Backend Engineer

Document management & B2B SaaS20+ concurrent verifications/sec · 90% debugging-latency cut

Architected the event-driven ML backend for Avento — recognized as the Indonesia National Winner at the Future Tech World Cup 2025 — translating complex document integrity checks into a scalable API handling 20+ concurrent verifications per second.
Reduced cross-service debugging latency by 90% by engineering a distributed request-tracing and observability layer across 18 Node.js/TypeScript microservices, replacing a log-less environment with real-time root-cause analysis.

TypeScriptNode.jsNestJSRabbitMQRedisPostgreSQLMongoDBDocker

Jun 2023 — Sep 2024

DEALDULU

Backend Lead Developer

Livestream auction marketplace50K+ tx · 15K+ users · 200+ merchants

Led backend for Indonesia's leading livestream auction platform — scalable real-time systems for auctions and marketplace. Mentored 2 junior backend engineers through structured code reviews and end-to-end feature delivery.
Engineered a high-performance backend handling 50,000+ transactions, 15,000+ users, and 200+ merchants.
Built a serverless AWS Lambda media pipeline — asynchronously transcoded JPG/PNG uploads to WebP at ~80% perceptual quality, cutting per-asset payload size ~60% with no visible quality loss on mobile and materially reducing S3 storage + bandwidth costs.

TypeScriptNode.jsSocket.ioGraphQLPostgreSQLAWSLambdaRedis

Feb 2023 — Jun 2023

Tokopedia

Software Engineer Intern

Indonesia's largest e-commerce · GoTo GroupTokopedia-scale · BNPL

Maintained and optimized Tokopedia BNPL features and internal fintech systems, ensuring seamless integration with Kredivo, Indodana, and GoPay Later.
Integrated Pub/Sub messaging for real-time pay-later transaction updates — improved data accuracy and processing speed.
Collaborated across teams to troubleshoot and refine fintech APIs between Tokopedia and third-party providers.

GolangRabbitMQMySQLMongoDBRedisDocker

Oct 2021 — Aug 2023

Tribesocial

Backend Developer

Community platform SaaS20+ communities · hundreds of concurrent sessions

Architected core backend infrastructure delivering real-time chat and e-learning modules that reliably handled hundreds of concurrent sessions across 20+ communities.
Led infrastructure consolidation — merged 20+ isolated servers into a single optimized instance. 80% cloud cost reduction and 36% faster API response times through extensive SQL refactoring.

TypeScriptNode.jsSocket.ioGraphQLPostgreSQLGCP

Feb 2022 — Jan 2023

OneSmile

Backend Developer

Smart-city platform12 clusters · 90K+ users · 60+ facilities

Built and maintained the facility booking system across 12 clusters, 90,000+ users, and 60+ clubs/facilities.
Migrated backend services from PHP (Yii2) to Node.js — better API performance and maintainability with minimal downtime.
Eliminated duplicate reservations and refined queries — fewer booking conflicts, better UX.

PHPNode.jsYii2LaravelPostgreSQLMySQL

03Stack

The tools I reach for first.

Languages

JavaScript

TypeScript

Golang

PHP

Python

Backend

Node.js

NestJS

Express

Laravel

Yii2

Gin

GraphQL

REST

Socket.io

JWT

Prisma

Data

PostgreSQL

MySQL

MongoDB

Cloud & Ops

AWS

GCP

Azure

Lambda

Docker

RabbitMQ

GitHub Actions

Grafana

Biome

04Selected projects

Things I've built on my own time.

PayAccess

shipped

Finance management & payment gateway platform

Business-grade finance app for enterprise clients — bank transfers, e-wallet top-ups, bulk disbursements. Built the payment gateway as Backend IC with multi-provider support and Bank Indonesia SNAP compliance.

LaravelPHPSNAP API

05Writing

Notes on systems I've debugged at 2am.

Mar 2026

Tracing 18 microservices without losing your mind

Observability

7 min →

Jan 2026

Merging 20 community backends into one

Migration

12 min →

Nov 2025

How we cut storage costs 60% with Lambda

AWS

6 min →

Sep 2025

Designing a payment gateway that survives SNAP compliance

Fintech

10 min →

06Open source

github.com/irfanguvian

Commits year-to-date7164

Public repositories75

Current streak39 days

Language breakdown

TypeScript52%

Go10%

PHP14%

Other12%

07People I've shipped with

“

I worked with Irfan on several backend projects, and he's the kind of engineer you can count on to get it right. Super detail-oriented, thoughtful about how the product should work, and sharp when it comes to software security. Any team would be lucky to have him.

Darell Hoei
CTO, Momofin

“

Working with Guv has been a real game changer. Despite being young, he brings solid backend skills — from API design to database optimization — that noticeably leveled up our systems. What makes him stand out is the vibe: easy to work with, quick to adapt, always open to fresh ideas. If you're looking for a go-to backend developer who delivers impact, Guv is the name to remember.

Ebenhaezer Mahardhika Asyer
UI/UX Designer · Teammate

08Education