Hi, I'm Yosua
💻
Software Engineer (ML) | Large-Scale Recommender Systems & GenAI🎓
MComp AI - NUS📍
London - Current time 09:40 am GMT
Building recommendation systems at Amazon
Member of a research-oriented ML team focused on advancing LLM-based foundational recommender models and scalable training/inference systems. My team owns and deploys recommenders that serve millions of users on the Amazon home page. I'm a passionate about low-level PyTorch optimizations, distributed training, and high-throughput LLM pipelines
I also hold a Master's degree in Computing (Artificial Intelligence) from the National University of Singapore, where I studied advanced topics like 3D Computer Vision, Uncertainty Modeling in AI, and Big Data Technologies.
Here are a list of my passion projects, experiments, open source and more
2021
2021 - Present
Virtual Things
Typescript
Golang
Drag and drop website builder - Create shareable linktree-style shortlinks
View Site
2022
2019
Neural Rhapsody - 🎵
Python
Developer - Music generator in the style of Beethoven, Mozart and Bach, using an LSTM (Long short term memory) neural network.
View Demo
Work in progress
Virtual Polaroids
Typescript
NodeJs
Product demo (Work in progress, desktop only). Shareable virtual polaroids
Visit demo
2020
No longer maintained - Pizzeria Cavalese 🍕 - 800+ Monthly unique visitors 🎉
Typescript
NodeJs
Developer - Portfolio website for a restaurant by Kideta Group
Visit Site
2019
Space Destroyer 🛸 - A WebGL Shooter
WebGL
Developer - WebGL based space exploration and shooting game
Play Game
2020
Investigating Machine Learning Approaches for Predominant Musical Instrument Recognition in Polyphonic Music
Research
Python
ML/AI
First author - submitted to 2020 Joint Conference on AI Music Creativity
View Paper
2016
The Pokemon CLI
C++
Developer - A richly featured clone of the pokemon gameboy game, for the CLI
View Project
2019
Pawsome - A UI/UX Research Project
UI/UX
UI/UX Designer - Tracker and social media for your furry friends
View Demo
2018
Cleany Rooms
HTML5
Developer - Desktop game that has 3 different minigames, centered around trash and recycling
View Project
2018
Homie 🏚️ - An IOT Home Automation Management System
Java
Python
Javascript
Team leader of 13 student developers - Web-based smart home application, for your TV, AC, and lamps
View Project
2017
Cinema Ticketing Allocation System
Java
SQL
Developer - MacOS and Windows desktop app to for online cinema reservation
View Project
2020
A Comparative Study of Generalized Feature Extraction Techniques for Face Recognition
Research
Python
ML/AI
Computer vision course final assignment
View Paper
Certifications
AWS Certified Solutions Architect – Associate
2024
AWS Certified Cloud Practitioner
2024
Countries i've been in: 🇸🇬 🇬🇧 🇮🇩
Experiences
Software Engineer - Amazon
📍 London
Dec 2022 - Present
Working on large scale distributed systems powering Prime Video detail page
Distributed Systems
Java
Typescript
AWS
Working on large scale distributed systems powering Prime Video detail page
Software Engineer - Shopee
📍 Singapore
Mar 2021 - Dec 2022
1 y 9 mo
Worked on cloud infrastructure at Shopee. Mainly did web developement and nodejs
Web Development
Typescript
React
Nodejs
Worked on cloud infrastructure at Shopee. Mainly did web developement and nodejs
Software Engineer Intern - Tokopedia
📍 Jakarta
December 2018 - August 2019
9 mo
For 9 months, I interned at Tokopedia, an e-commerce platform in Indonesia. I was involved in developing the payment module that served an equivalences of 1.5% of the country's GDP
Distributed Systems
Backend
Golang
React
For 9 months, I interned at Tokopedia, an e-commerce platform in Indonesia. I was involved in developing the payment module that served an equivalences of 1.5% of the country's GDP
Competitive Programming Team
📍 Jakarta
June 2017 - August 2018
1 y 2 mo
Some time ago, I was part of the competitive programming team at University. Im not the best at it, but I do enjoy solving problems on sites like UVa, Codeforces, and VJudge. (and ocassionally still do, though more recently on leetcode)
Competitive programming
C++
Algorithms
Data Structures
Some time ago, I was part of the competitive programming team at University. Im not the best at it, but I do enjoy solving problems on sites like UVa, Codeforces, and VJudge. (and ocassionally still do, though more recently on leetcode)
ICPC Profile: https://icpc.global/ICPCID/2EU7HDM2CONX
Education
MComp - NUS (National University of Singapore)
2021 - 2023
I recently graduated from MComp AI program at the National University of Singapore. Topics of interest includes computer vision, uncertainty modelling in AI and data-driven decision making
Bachelor of Computer Science - University of Nottingham
2016 - 2020
I conducted machine learning research at the University of Nottingham as part of my dissertation, in requirements of completing my dual degree from joint program with Binus University. You can find the link to the paper in the projects section below.
Bachelor of Computer Science - Binus University International
2016 - 2020
Earned best graduate title (Second highest GPA in cohort). Graduated summa cum laude
💻 Skills
Distributed systems (backend)
Java
Kotlin
AWS (EC2, ECS, S3, CDK)
Docker
Machine learning
Pytorch
Python
Jupyter
Pandas
Frontend development
React
Node
Typescript
🏆 Other achievements
Best Graduate - School of Computer Science
Second highest GPA in cohort 3.93 / 4.002020
Head of Event and Design
Freshman Enrichment Program 2018 (undergraduate induction)2020
Organizing committee (property division) of TEDxBinusUniversity: Loud Voices
TedX Organization2018