# Jonathan Filbert

> Senior Software Engineer at ByteDance Global E-Commerce. Top 1% mentor on ADPList. Speaker. Based in Indonesia, building products used by millions worldwide.

Jonathan Filbert (jofil.id) is an Indonesian software engineer specializing in frontend engineering at scale, fintech products, and cross-platform mobile development. He currently works on TikTok Shop's core seller experience, serving 1+ million daily sellers across 17 countries. He is also a globally recognized mentor, speaker, and advocate for engineering careers in Southeast Asia.

## About

- [Home](https://jofil.id): Introduction, bio, and overview of Jonathan's work and values.
- [Experience](https://jofil.id/experience): Full career timeline including ByteDance, GoTo Financials, Tokopedia, PINTU, and MyRobin.
- [Works](https://jofil.id/works): Featured products Jonathan has shipped — TikTok Shop seller tools, GoPay crypto exchange, Tokopedia fintech suite, and more.
- [Talks](https://jofil.id/talks): Speaking history at Google DevFest, GoTo DevCamp, university events, and industry conferences.
- [Mentoring](https://jofil.id/mentoring): Jonathan's mentoring program via ADPList — open to students and early-career engineers globally.

## Current Role

Jonathan is a Senior Software Engineer at **ByteDance Global E-Commerce** (February 2024–present), working on TikTok Shop Fundamental Business. He leads product surface development across a team of 130+ engineers spanning 7 cities. Key highlights:

- Led the launch of the TikTok Seller AI Assistant, achieving a 228.2% CSAT increase.
- Drove the migration of 2.3 million Tokopedia sellers to TikTok Shop, generating $12M average daily GMV.
- Rebuilt 8 product pages with a modern framework, reducing build time from 1 hour to 4 minutes.
- Consistent 3x winner of the Global E-Commerce Quarterly Spot Award.

## Career History

- **ByteDance** (Feb 2024–present) — Senior Software Engineer, Global E-Commerce
- **GoTo Financials** (Aug 2022–Feb 2024) — Founding Engineer, Crypto Investment (GoPay Crypto); won Google Play Best App & User Choice 2023
- **Tokopedia** (Feb 2022–Dec 2022) — Software Engineer, Fintech Tribe; launched GoPay Later, Instant Loan, Tokopedia Card
- **PINTU** (Apr 2020–Mar 2021) — Early Engineer; scaled from 600 to 170K daily downloads in 1 year
- **MyRobin** (Feb 2021–Jun 2021) — Software Engineer, HR Management

## Technical Expertise

Frontend engineering, React, TypeScript, Next.js, Flutter/Dart, Lynx (ByteDance hybrid framework), Bazel, Firebase, Fastlane. Domain experience spans e-commerce platforms, fintech, cryptocurrency exchanges, and mobile super-apps.

## Mentoring

Jonathan is a **Top 1% global mentor** and **Top 50 Frontend Engineering Mentor** on ADPList (February 2023–present). He has mentored 100+ students and early-career engineers from Indonesia, Malaysia, India, USA, Canada, and beyond. Mentees work at or have joined companies such as Amazon, Flipkart, Shopee, GoJek, and Tokopedia, and universities including the University of Waterloo and University of Indonesia.

Mentoring topics: software engineering interviews, startup vs. corporate career paths, research paper writing, engineering internships, performance reviews, people skills, and personal branding.

## Speaking

Jonathan speaks on hybrid frontend engineering at scale, Flutter and cross-platform development, personal branding for engineers, and career development in tech. Past venues include Google DevFest Jakarta, GoTo Group DevCamp, COMPFEST University of Indonesia, and Telkom University.

## Research & Awards

- Published IEEE paper (ICACSIS) on tracking application research; awarded Best Session Speaker (E-Government track).
- 3× ByteDance Global E-Commerce Quarterly Spot Award winner.
- Google Play Best App & User Choice 2023 (GoPay App).
- Top 1% Mentor globally on ADPList.

## Contact & Social

- **Website:** https://jofil.id
- **Email:** contact@jofil.id
- **LinkedIn:** https://linkedin.com/in/jonathanflisyanto/
- **GitHub:** https://github.com/jonathanfilbert
- **X (Twitter):** https://x.com/jonathanfilbert
- **ADPList:** https://adplist.org/mentors/jonathan-filbert
- **Blog:** https://read.jofil.id
- **TikTok:** https://tiktok.com/@jfilbert