Full Stack Software Engineer, product minded, and a mentor on the side.

I'm Daffa. I have spent 4.5+ years building for fintech, travel and AI, and I like the whole path from a written PRD to a monitored production release.

Day to day I work in Next.js, TypeScript and Golang. Lately I also build with Claude: a trading chart assistant that shipped to the Chrome Web Store, and AI customer conversations for a travel booking platform.

I have led teams of 3 and mentored 200+ bootcamp students, which is why I write specs and reviews that other people can follow.

Open to collaborations, freelance work and full time roles, in Indonesia and abroad. Remote, hybrid or on site all work for me.

Download resume Get in touchJakarta, Indonesia

A little more about me

Experience

Two lists on purpose. The first is my full time career. The second is contract, part time and community work that I do alongside it.

Full time (3)

Employed roles, newest first.

Consumer fintech and buy now pay later platform across Southeast Asia.

Led the full stack rebuild of the collections platform as Viper V2 (Next.js 16, TypeScript, Node.js, Golang) with a responsive redesign, role based access control and 90+ Lighthouse scores on desktop and mobile, resolving 10+ legacy bugs.
Cut response time from about 12 s to 2 to 3 s (75%+ faster, measured in Datadog) with pagination, indexing, cache TTL and database locking.
Expanded Viper V2 from 1 region to 4 (Indonesia, Thailand, the Philippines and Vietnam) with independent BigQuery reporting and 90%+ test coverage per region.
Automated access registration and removal for 5,000+ employees with CRON schedulers and an event driven Go service on Kafka, synced from Darwinbox through HMAC verified webhooks with a polling fallback.
Cut stakeholder request delivery time by roughly 70% by matching the tool to the problem (Apps Script, Cloud Run, BigQuery Scheduled Queries, AppSheet), including 5 GCP schedulers that email collections reports with Slack alerts.
Delivered the Agent Onboarding Journey Tracking platform, unifying data from 7 teams so leadership can track and improve onboarding pass rates.

Next.jsTypeScriptGolangNode.jsKafkaBigQueryDatadogGoogle Cloud

Contract, part time and community (4)

Project based and volunteer work, newest start first. Some of it is ongoing.

Travel booking platform for local and international tours, with B2C and B2B flows.

Architected and shipped pergiceria.com (Golang, Next.js, MySQL), processing 20+ transactions worth over IDR 50 million (about USD 2,700) since the August 2026 launch, with Xendit across 8+ payment channels, Resend and Twilio notifications, and Mekari Qontak CRM and AI for WhatsApp customer conversations.
Led a team of 3 (engineer, designer and a business owner for UAT) from research and timeline planning through development, testing, UAT and deployment, and wrote 8 PRDs covering user flows, UI mockups and API contracts, using Claude Code across planning, ERD design, documentation and testing.
Built B2B tooling: bulk email campaigns for 100+ B2B companies, and a manual booking form with company specific pricing so B2B customers skip the B2C flow.
Cut monthly infrastructure cost by about 60% by right sizing the VPS with no loss of product quality, and gated notification triggers to keep messaging costs down.

GolangNext.jsMySQLXenditClaude CodeLighthouse

Skills

Hard skills

Frontend and Design

React.js
Next.js
TypeScript
Tailwind CSS
Figma

Responsive Design
Web Performance
SEO
UI/UX Design
Unit Testing

Backend and Data

Golang
Node.js
Express.js
Kafka
MySQL
BigQuery
Firebase
Supabase

REST API Design
Event Driven Architecture

Cloud, Monitoring and Payments

Google Cloud
Datadog
Kibana
Grafana
Stripe
Xendit

Scalyr

AI and LLM Applications

Claude API
Claude Code
GitHub Copilot
Cursor
MCP

Prompt Engineering
LLM Application Development
Agentic AI (OpenClaw, Hermes Agent)
CRM and WhatsApp Integration (Mekari Qontak)

Currently building with: AI Agents, Structured Outputs, RAG

Soft skills

Technical leadership
Led teams of 3 at Pergi Ceria Tour and Jet Studio, and raised sprint completion from 2 of 5 planned tasks to all 5.
Product management
Wrote 8 PRDs covering user flows, UI mockups and API contracts, and ran research, timelines, UAT and deployment.
Mentoring
Mentored 200+ bootcamp students across 10+ batches, averaging 4.75+/5 from learners.
Code review and standards
Led code and design reviews at tiket.com and introduced review workflows on distributed teams.
Public speaking
Judge and speaker at the Fydemy BitBash Hackathon, speaker at the UIUXINDO Product Design Festival, and host of community tech sharing sessions.
Technical documentation
Wrote a 10 page flow specification, PRDs and shared prompting guides that teams used for onboarding and maintenance.
Working across teams
Delivered with stakeholders from 7 teams at Kredivo, regional teams in 4 countries, and L&D and class managers at Dibimbing.

Education

Universitas Sriwijaya

B.S. Computer Science

Aug 2018 to Jun 2022, GPA 3.74 / 4.00

Languages

Indonesian (native), English (native level)

Have a role, a project or a question? Say hello.