Erwin Leonardy

About Me

"The sole meaning of life is to serve humanity"
Leo Tolstoy
Erwin is a full-stack engineer who has worked on multiple web development stacks (React, Django, Flask, Rails, Node.js) throughout his professional career.

He is currently a Product Engineer at Gojek. He was previously a Backend Engineer at Xfers (now Fazz). He was also one of the Founders of Pengacaramu; Pengacaramu was an online legal marketplace that aimed to solve the trust issues between lawyers and clients.

Erwin is a computer science graduate who loves mentoring, problem-solving and working in a team. He was involved in his school's mentoring program, where he was the mentor for a project called Project Altair. It is a project where students are groomed into talents who can solve real-world problems with their digital prototypes.

In his free time, he enjoys reading, photography, and taking part in hackathons to solve real-world problems.


Social Events Cover

Social Events 👨‍👩‍👦

Social Events
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Portraits 📸

Graduation Cover

Graduations 🎓

Personal Events
Products Cover

Products ⌚

Landscape Cover

Landscapes 🌇

Labour Day Cover

Labour Day 🏋️‍♂️

Corporate Events
Marriages Cover

Marriages 💍

Personal Events
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Birthdays 🎂

Personal Events
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Outdoor Events ⚽

Personal Events



Sept 2022 - Present
Gojek, GoTo

Product Engineer

Oct 2020 – Sept 2022
Xfers (YC S15), Fazz

Backend Engineer (Transactions Team)

• Spearheaded and led the first batch of Xfers’ Internship Programme
• Debugged complex production codes and improved logging using Datadog and Rollbar
• Reduced merchant dashboard queries loading time from 15 minutes down to less than 1 minute
• Xfers is Southeast Asia's leading Fintech platform for digital businesses.
• Transactions team is the backbone of Xfers core business in providing various payment solutions across Indonesia and Singapore.
• Tech-stack: Ruby on Rails, Sidekiq, Redis & MySQL

Jan 2020 – Feb 2021

Founder & Full-Stack Developer

• Built a marketplace, with a publicly viewable URL for each user, using Bootstrap, ReactJS, Axios, and Redux
• Implemented a backend system using NodeJS, Google’s Firestore NoSQL database and Cloud Function
• API Integrations: Xendit (Real-time payment) and Twillio (Real-time chatting feature)

Aug 2019 – Jan 2020
Suntory Beverage & Food Asia

Freelance Full-Stack Developer

• Built RESTful API endpoints using Django REST Framework and Postgres
• Implemented an authentication system using Django JWT Authentication and ReactJS
• Designed interactive and responsive frontend pages using Bootstrap, Axios, ReactJS, and Redux
• Built a Continuous Integration / Continuous Delivery (CI/CD) pipeline using Docker-Compose and Travis CI
• Hosted backend codes on GCP’s Compute Engine and frontend codes on Google’s Firebase Hosting


Jan 2017 – June 2019
University of Wollongong

Bachelor of Computer Science (Digital Systems Security)

• Dean’s Merit List 2017-2018 (Top 5% of the cohort)
• Graduated with Distinction (Average Mark: 83)
Coursework: Algorithm and Data Structure, Distributed System and Cloud Computing, Object and Generic Programming in C++, Java Programming and Applications, System Developments, Software Development Method and Tools, Database System, Cryptography and Secure Applications, Network Security, System Security

Leadership Experience & Co-Curricular Activities

Aug 2018 – July 2019
Innovation and Networking Society (IONS)

Technical Lead

• Awarded the Impact Award for outstanding performance and contributions
• Organized and trained 14 members in the 3 Days Python Workshop
• Mentored 15 IONS members for a 4-month Flask web-application projects
• Advised members on front-end and back-end issues and solved team challenges

Apr 2018 – Jun 2018
Singapore Institute of Management

Peer Assisted Learning (PAL) Leader

• Tutored 6 students in module, Object and Generic Programming in C++
• Enabled all students to obtain at least 65 marks

Aug 2017 – Dec 2017
Singapore Institute of Management

Harvard National Model United Nation (HNMUN) Trainee

• Selected into 25 delegate-team out of 125 applicants after interviews and assessment center
• Researched and negotiated in an UN General Assembly diplomatic simulation in SIM


Mar 2019

2019 Hack NTU Finalist

• Chosen as one of the finalists out of the 150 contesting teams in 2019 Hack NTU
• Implemented the back end for the mobile app using Smart Nation API, Android Studio and Firebase that promotes social interaction and raises awareness of the environment

Jan 2019 – July 2019

Secure Remote Authentication using Visual Cryptography

• Led a team of 4 and implemented a secure cheque signing web application using visual cryptography and steganography, which was built using Python - Flask, HTML, CSS, Heroku, and Google Cloud Platform
• Designed the entire backend, frontend, and MySQL table schema
• Improved user experience by using jQuery and AJAX
• Developed a noise-cancelling feature for the reconstructed image

Coding Skills

Ruby Ruby on Rails Python Flask Django JavaScript Nodejs TypeScript Java C++ C PHP PostgreSQL MySQL Firebase
React redux Sass CSS3 html5 jquery
npm Yarn Docker Travis CI Google Cloud Platform Heroku git github actions