Open to internships: Summer 2027 & Aug–Nov 2027

Sean Hardjanto

I build web apps people use. I build tools for small teams. I build things that ship. I build websites for clients.

I’m a Computer Science student at NUS, and I like the front-end best: it’s where I get to see my work come to life. My proudest work so far is the GenAI SEO Writer, which I built at Guidesify and which is still their flagship product.

See the work Résumé
Sean Hardjanto smiling at a graduation dinnerNUS CS · Y3

Currently: Univers · Singapore (SGT --:--:--)

3

AI and software engineering roles

Univers · Aumovio · Guidesify

200+

freshmen onboarded

RVRC orientation · vice project director

3

languages spoken

English · Bahasa Indonesia · Mandarin

85/90

A-Level rank points

Hwa Chong Institution · 2021

[01]work

Selected work 

Click any card for the case study: the problem, the build and the outcome.

GenAI SEO Writer interface▶ demo

GenAI SEO Writer

01/03

Turns a brief into an SEO-ready article, then publishes it to WordPress and Telegram from the same place.

Product engineerJun 2024–presentGuidesify · flagship product

  • Svelte
  • SvelteKit
  • Tailwind CSS
  • Node.js
  • PostgreSQL
  • WordPress
  • Telegram
  • REST APIs
UEN Search interface▶ demo

UEN Search

02/03

A simple search tool for finding ACRA-registered Singapore businesses by name or UEN.

Product engineerApr 2024Guidesify · internship

  • Svelte
  • SvelteKit
  • Tailwind CSS
  • Node.js
  • PostgreSQL
  • REST APIs
DozeBuster interface▶ demo

DozeBuster

03/03

A computer-vision study companion with a live Doze Meter for spotting when you drift off.

Full-stack buildJan 2025Hack&Roll 2025 · team mud

  • React
  • Next.js
  • Tailwind CSS
  • Python
  • Computer Vision
  • PostgreSQL
More experiments at apps.34cats.com

[02]experience

Experience 

Click an entry to unfold the details.

  1. I work with client teams to find where an ontology layer or an AI platform would save them time, then prototype the fix quickly.

    • Analyzed existing client workflows and proposed solutions around building ontology layers and AI Platforms to improve business efficiency in collaboration with the AI lab heads and GTM team.
    • Performed rapid prototyping for proposed solutions to validate feasibility and business impact.
    • Conducted research on self-improvement and recursive self-improvement (RSI) agents and implemented SI and RSI loops, integrating them into both in-house and client solution workflows.
    • Agentic AI
    • LLMs
    • Python
    • Rapid prototyping
    • Client workflow analysis

[03]education

Education 

Flip a card for the footnotes.

2024–present · Year 3

National University of Singapore

Bachelor of Computing in Computer Science · GPA 4.5/5.0

National University of Singapore

  • RVRC Orientation Vice Project Director, onboarded 200+ freshmen
  • NUS Fencing Club Logistics Executive
  • Coursework placeholder: favourite module so far (edit me)

2020–2021

Hwa Chong Institution

GCE A-Levels · 85/90 rank points

Hwa Chong Institution

  • Floorball goalkeeper / defender
  • Vice Chairperson, Project Rejuvenation with Blessings in a Bag

2017–2019

Bukit Panjang Government High School

7 A1s · L1R5 nett 2

Bukit Panjang Government High School

  • NCC (Air), Platoon Sergeant
  • Class chairperson

[04]skills

Skills and tools 

Pick a skill to see where I've used it.

Languages

AI & automation

Frontend

Backend & data

Practices & tools

Beyond code

Pick a skill above to see the projects and roles where I've used it.

[05]outside code

Outside of code 

SMUVC 2025 · last bout

3rd place for SMUVC25 Men's Foil Teams3rd place for SMUVC25 Men's Foil Teams
1st place with RVRC Floorball in Inter College Games 20251st place with RVRC Floorball in Inter College Games 2025
Vice-Project Director for RVFOP25Vice-Project Director for RVFOP25

[06]questions

FAQ 

Questions people ask me.

I currently have no plans to start a company or brand but if I did, I would name it 34cats. So I decided to use that domain for my personal website to get the domain early and maybe build some domain authority over time.

[08]contact

Get in touch. 

Contact

Internships, freelance builds, hackathon teams, or a good excuse to draw more cats. My inbox is open.

Say hello
Download résumé