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Work Experience
Fly Fairly
Software Engineer InternJan 2026 - Apr 2026Identified and eliminated 3 key operational bottlenecks through structured stakeholder interviews.
Built back-office reporting dashboard with Next.js, reducing cross-team coordination overhead and improving sprint throughput by an estimated 20%.
Proposed and documented modernized tech stack solutions for interviewed problems which were adopted into the technical roadmap for 3 out of 6 company departments.
Toppan Ecquaria
Software Engineer InternMay 2025 - Jul 2025Designed and integrated RAG pipelines and LLM-based AI agents into enterprise SaaS products, enabling context-aware document Q&A; deployed across 10+ client companies, directly contributing to new product adoption.
Enhanced an AI lip dubbing system by leveraging open-source audio models such as Kokoro and the LatentSync lip-sync model, enabling multilingual AI video dubbing solutions sold at $5,000 per license.
Refactored and modernized multiple web applications using React and FastAPI, improving UI performance and scalability for the group's 2,000 users.
Lyza Education
Software Engineer InternMar 2024 - May 2024Built and deployed a web-based learning management tool in Next.js used by 100+ students to submit assignments, track progress, and receive automated feedback on programming exercises.
Singapore Armed Forces
Deputy Staffer 4 Officer, 21 Singapore ArtilleryFeb 2022 - Feb 2024Trained and served as an Artillery Officer. Learnt interesting technical knowledge such as fire direction calculation, gun positioning and even war strategy.
In-charge of a company of 80+ soldiers, responsible for their welfare and training
Specialised in logistics, taken part in both Junior and Advanced Logistics course
Genuinely one of the most fun and meaningful moments of my life. Enjoyed meeting people from different walks of life serving the same mission. Really reignited the patriotism in me.
Education
National University of Singapore
Bachelor of Computing, Computer Science2024 - 2027Extracurricular: Google Developer Student Club Software Engineer, NUS Fintech Society Software Engineer
Grade: First Class Honors
Nanyang Junior College
Singapore-Cambridge GCE A-Level, Biology, Chemistry, Math, Economics (BCME)2020 - 2021Grade: AAAA/A
Tech Stack I work with
I have experience with various technologies across web and mobile development. Here are some of my favourites.
Check out my latest projects
I've worked on a variety of projects, from simple websites to complex applications. Here are a few of my favorites.
Minecraft GPT
When I was 14, I failed my art class. Back then I was addicted to Minecraft and I realised that I have zero artistic talent. Hence, we decided to build Minecraft GPT, a mod which allows us to spawn structures in through text and images only.
Java
FastAPI
Exa
GPT Image
Fal API
Orbital Project Log Generator
I was frustrated at how long and tedious it takes to create a project log for Orbital. As the project log task messages are identical or similar to git commit messages, it is possible to create a project log file from git commit data. Hence, I built a script in python which convert git commit data into a project log CSV file. The script also has option to use Groq API key to estimate hours spent on task as well.
Python
Groq API
Github API
Hao Jun's Portfolio
With application season coming up, I wanted to create a portfolio website that showcase my work experiece, education and projects. More importantly, I want to build a canvas that reflects my design philosophy and personal brand. Had alot of fun trying out new UI designs and cool animations. Let me know if there is any way I can improve on this portfolio.
Next.js
Typescript
Prisma
MongoDB
TailwindCSS
Shadcn UI
Magic UI
Vercel
Orbital Project Log Generator
I was frustrated at how long and tedious it takes to create a project log for Orbital. As the project log task messages are identical or similar to git commit messages, it is possible to create a project log file from git commit data. Hence, I built a script in python which convert git commit data into a project log CSV file. The script also has option to use Groq API key to estimate hours spent on task as well.
Python
Groq API
Github API
GroceryPicker
GroceryPicker is a full-stack android application with web support. It is an application which helps user build grocery lists and find cheapest grocery items and where to purchase them from various grocery stores. This allows users to easily maximising savings on grocery items without having to walk back and forth between grocery stores to compare prices.
React Native
TypeScript
Express.JS
PostgreSQL
Supabase
NativeWindCSS
GCP
RAG
Playwright
Jest
Python
3D Parkour
3D Parkour is a third-person parkour simulator where player has to navigate its character through a set parkour course. The entire game is written with a game engine that i built by myself, written using C++ and OpenGL. I had alot of fun experimenting with graphics and game physics.
C++
OpenGL
Game Development
Game Engine
Aim Labs
Aimlabs is a first-person shooting trainer where player has to shoot down targets. It is meant to be a take on the popular KovaaK's aimlabs. The entire game is written with a game engine that i built by myself, written using C++ and OpenGL. I had alot of fun experimenting with graphics and game physics.
C++
OpenGL
Game Development
Game Engine