~ / irfanguvian — portfolio — dark

irfan@backend:~$whoami --verbose

Backend systems that
survive real traffic.

Software engineer with 5+ years leading platform engineering across fintech, proptech, and real-time marketplace systems. I specialize in Node.js/TypeScript at scale — event-driven microservice architecture, distributed observability, migration strategy, and engineering standards that span multiple teams. I own systems end-to-end: architecting from scratch, shipping to production, and mentoring engineers along the way.

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 a YAML-based workflow runner automating sequential API calls to replicate backend user flows — ~95% reduction in QA test execution time.
Engineered an Azure Blob file uploader + automated WebP pipeline — zero failure rates on 100MB+ transfers and 80% smaller asset payloads.
Lead on the Vendor Management platform for 70+ Sinar Mas Land subsidiary companies — overseeing 2 internal engineers and advising 3 contractor teams on cross-service integration, with core workflows shipped and full product nearing launch.

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

Apr 2022 — Feb 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

Oct 2021 — Apr 2022

Maven Digital Asia

Full Stack Developer

IT consultancy3 internal dashboards · 5-person team

Developed 3 internal business dashboard applications (Hedge Fund portfolio management, Seraphim back-office, Dragon Hot Pot inventory) as one of two full-stack engineers in a 5-person team.
Built core features for a Hedge Fund portfolio management dashboard — NAV tracking, disbursement workflows, user onboarding metrics, and investment allocation views for portfolio manager admins.
Delivered the full deployment lifecycle, from development to production server configuration, ensuring availability and performance across client environments.

ReactNode.jsExpress.js

Aug 2021 — Oct 2021

Sagara

Full Stack Developer Specialist

IT consultancyTeknologi.id content platform

Contributed backend development on Teknologi.id — building and maintaining CRUD APIs using Laravel and MySQL based on product tickets and PRD specifications.
Implemented new features aligned to Figma designs alongside a senior engineer, supporting the platform's content management workflows.

LaravelPHPMySQL

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

Frontend

React.js

Next.js

Data

PostgreSQL

MySQL

MongoDB

SQL Server

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

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