KARTHIK SANKAR19 / SINGAPORE

Hey, I’m Karthik.
I like making
things happen

I’m a developer in Singapore who enjoys building software, tinkering with hardware, and getting people together to work on things they’re excited about.

Explore my work
RIGHT NOW

3SG in the SAF / Next up: NTU Computer Engineering

01 / SELECTED WORK

Things I’ve been working on

A mix of personal projects, hackathon builds, and ideas I wanted to see through. Inkwell is especially close to me.

01 / PERSONAL / JOURNALLING
InkwellA little room for your thoughts.
A place to put your thoughts

Inkwell

PERSONAL

Inkwell is a simple journalling app and one of the projects that means the most to me. You can start writing without signing up, and come back to your journal with a code.

02 / VUE / WEB + CHROME EXTENSION
EchoReviewTHE VOICE OF EVERYONE
Best Vite Hack · NUS Hack&Roll 2025 · Picked by Evan You

EchoReview

VUE

EchoReview brings product reviews from different websites together and summarises the pros, cons, and overall rating. It’s the project that won me Best Vite Hack at NUS Hack&Roll 2025, personally picked by Evan You.

03 / PERSONAL / WEB APP
Dear future meFROM NOW → FOR LATER
A message for your future self

Capsule

PERSONAL

Capsule lets you write a message to your future self and have it emailed back at a random time. It could arrive in an hour or almost a year, so you don’t know quite when you’ll hear from yourself.

04 / AI / DEVELOPER TOOLS
TraceGuard
2nd place + TinyFish Accelerator Golden Ticket

TraceGuard

AI

We built TraceGuard at the TinyFish Hackathon to use AI to scan for IP infringement. It earned us second place and a Golden Ticket to the TinyFish Accelerator.

05 / IOT / HARDWARE
infoair
AN IOT AIR QUALITY MONITOR
2nd at JA Singapore · Represented Singapore at JA APAC

InfoAir

IOT

I co-founded InfoAir as CTO, working on an IoT air quality monitor. We placed second at JA Company of the Year Singapore and went on to represent Singapore at JA APAC.

06 / OPEN SOURCE / CLIDeveloper tooling

apiguard-cli

OPEN SOURCE

My first npm package generates OpenAPI documentation without needing configuration. It was a way to make API documentation a little less of a chore.

07 / VS CODE / EXTENSION
/api
GET /projectsPOST /projectsGET /projects/:id
API route visualisation

APIGuard

VS CODE

APIGuard is a VS Code extension for visualising API routes, so you can see how they fit together without leaving your editor.

02 / THE PERSON

Hey, I’m
Karthik.

Usually working on something, following cricket or F1, or thinking about where to travel next.

I’ve always enjoyed figuring out how things work, especially when I can try building something myself.

I’m 19 and based in Singapore, where I’m currently serving National Service as a 3SG in the SAF. Once I’m done with NS, I’ll be heading to NTU to study Computer Engineering.

Most of my software projects use TypeScript, Next.js, React, and Node.js, but I also enjoy working with ESP32s and designing PCBs in EasyEDA. I run an Ubuntu home server with Coolify as well, so self-hosting has become another thing I spend time on.

Outside of coding, I’m into cricket and F1, and I enjoy travelling whenever I get the chance. I’m also vegan, if we’re ever figuring out where to eat together.

TOOLS I REACH FOR
TypeScriptNext.jsReactNode.jsESP32EasyEDAUbuntuCoolify
03 / BETTER TOGETHER

The people side of things

Alongside my own projects, I spend a lot of time organising events and helping run coding communities in Singapore.

FOUNDED PROGRESSIO
35 → 400+

Watching Progressio grow

I founded Progressio and grew it from 35 to over 400 participants, with Google, DBS, and TikTok coming on board as sponsors along the way.

01 / COUNTERSPELL SINGAPORE

Getting 120 people together

I organised Counterspell Singapore, bringing together 120 participants with sponsorship from Google and TikTok.

02 / CAMPFIRE SINGAPORE

Organising Campfire Singapore

I also organised Campfire Singapore, with Razer sponsoring the event.

Hack Club SG

I run Hack Club SG across multiple coding clubs, alongside my wider involvement with The Hack Foundation.

7 years with Project SMILE

I’ve volunteered with Project SMILE Singapore for seven years. One of my contributions was building an inventory management system for the team.

04 / ALONG THE WAY

A few good moments.

01

Best Vite Hack with EchoReview

EchoReview won me Best Vite Hack at NUS Hack&Roll 2025, with Evan You personally picking it as the winner.

02

TraceGuard at TinyFish

We came second at the TinyFish Hackathon and received a Golden Ticket to the TinyFish Accelerator for TraceGuard.

03

From Singapore to JA APAC

With InfoAir, we placed second at JA Company of the Year Singapore and represented Singapore at JA APAC.

04

41/45 in the IB

I graduated with 41/45, including 7s in Math AA HL and Physics HL, and As in both EE and TOK. I was also Head Boy at GIIS SMART Campus.

PLACES I’VE LEARNED

Experience

The Hack Foundation

Fall Events Engineer · Club Operations / Program Development lead

Incomlend & Stemly

I’ve interned at both Incomlend and Stemly, and developed Stemly’s website during my time there.

A LITTLE DEEPER

For my IB Extended Essay, I researched LLM parameter optimisation, which gave me a chance to spend more time on the technical questions behind the tools I use.