Hey, I'm Ritvik!

I'm studying EE with potential minors in Engineering Entrepreneurship, Math, and South Asian Studies. I hope to build impactful, innovative, and equitable medical device technologies.

I like creating projects and doing work that have applications in my everyday life, use a little creativity, and teach me new skills.

If you're looking into embedded, robotics, medtech, or systems work, my projects are where I show what I can do. If you're just browsing, hope you enjoy some of the things I've created.

Let's connect: rellen26@seas.upenn.edu

Ritvik Ellendula

Building stuff I find cool.

Move your cursor to play with the desk

Recent work

Projects I'm especially proud of

All projects

SystemsFeatured

F01

Systems·2026

C Compiler

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OCaml · lexer → TACKY IR → x86-64

Built an OCaml-based C compiler lowering source programs through lexer → AST → semantic analysis → TACKY IR → x86-64 assembly, with support for lexical scoping, control flow, loops, and structured IR lowering.

Recursive descent parser + AST construction for nested unary ops
Semantic pass: symbol resolution, lexical scoping, break/continue loop labels
Custom TACKY IR + control-flow lowering (labels/jumps) before x86-64 codegen

Systems signal · Compiler pipeline · IR design · stack lowering · x86-64 emit

OCamlCompilersRecursive DescentTACKY IRx86-64Semantic Analysis

GitHub Case study

Machine LearningFeatured

F02

ML Systems·2026

MiniTorch-OCaml

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Reverse-mode autodiff in OCaml

Built a PyTorch-inspired autodiff engine in OCaml, modeling computations as graph-based tensor operations and implementing reverse-mode differentiation through explicit graph traversal.

Computation graph construction with typed tensor nodes and ops
Reverse-mode backprop via explicit tape traversal (not magic .backward())
OCaml modules + gradcheck harness; roadmap toward vectorized tensor backend

Systems signal · Autodiff engine · computation graph · ML systems in OCaml

OCamlAutodiffBackpropagationComputation GraphsGradient Checking

GitHub Case study

EmbeddedFeatured

F03

Robotics·2026

BloomBot IoT

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WiFi actuators · Blynk · embedded integration

IoT robotic flower on Arduino UNO R4 WiFi: Blynk remote control, multi-servo petal actuation, LCD + ultrasonic sensing, and Morse-code LED feedback in one embedded pipeline.

Blynk virtual pins → servo sequences over WiFiS3
I2C LCD status + ultrasonic proximity events alongside motion
Power/timing debug across concurrent actuators and wireless drops

Systems signal · Embedded IoT · actuators · sensors · wireless control loop

Arduino UNO R4 WiFiBlynkServosUltrasonicI2C LCDEmbedded C++

GitHub Devpost Case study

HardwareFeatured

F04

Hardware·2026

Lightsaber

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Fusion 360 CAD · LED power · soldered integration

Handheld lightsaber build integrating Fusion 360 CAD, 3D-printed hilt/battery packaging, LED strip power routing, and switch wiring with solder joints rated for motion.

3D-printed hilt, emitter, battery carrier with tolerance iteration
LED strip segmentation + switch path for even blade glow under load
Contact/solder reliability under flex — integration, not bench-only wiring

Systems signal · Hardware integration · CAD + circuits · power under motion

Fusion 3603D PrintLED StripSolderingCircuit DesignCAD

Also worth a look

More builds

Apps, tools, and experiments that still taught me a lot.

Full-Stack

S01

Full-Stack·2026

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Campus dining social · Next.js + Supabase

Full-stack social dining app: Next.js frontend, Supabase auth/data, designed for Penn SPARK student usage.

Next.jsSupabaseReactPenn SPARK

View full project archive

What I'm usually thinking about

How can I create things that can provide utility to life? Whether its practical application or just fun usage.

Medical devicesEmbedded & roboticsSystems & compilersMachine learningDance & music