Henry Fellerhoff

Me in green hat outside with a bright blue sky in the background

Hey there!

I’m Henry, a software engineer and musician based in New York City.

I am passionate about building beautiful and impactful software. I love the process of understanding user pain points, coming up with a great UX, and creating apps that are a joy to use. I thrive with lots of autonomy, and enjoy the process of taking a project from ideation to completion. I can work in both full-stack roles and in more frontend-focused ones, and pride myself on being a “design capable” developer.

I’m always working on a project. I’m most known for Open IPA, an IPA transcription tool that helped 9,483 people this month learn how to pronounce Latin and French text. Recently, I’ve started working on Serial, an RSS reader for YouTube looking to bring joy and control back to watching videos. I love working on things that drive intententionality, bring people together, or spark joy in someone’s day.

I love learning, and keep up with news in web development and beyond. I keep an eye on the YouTube/Twitter zeitgeist, and am always looking to filter out useful new approaches, libraries, and languages from the noise. I try to follow a wide variety of sources, and regularly investigate anything interesting in my free time.

If you’d like to work together, don’t hesitate to reach out!

Work Experience

Beacons

June 2022 - Present

An all-in-one creator platform for building a link-in-bio, selling products, sending emails, and more. I work across the stack and have led major feature and architectural work.

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Dendron

June 2021 - August 2021

A knowledge management tool built into VSCode. I worked on a variety of features, most notably the graph view.

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MLH Fellowship

October 2020 - December 2020

Built a proof-of-concept LMS (learning management system) with a small team. Led frontend development, designing and implementing interfaces to view courses, take quizzes, and fulfill other LMS functionality.

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Modern.fm

June 2020 - July 2022

I built this site to help two friends of mine sell instrumental sample packs. Everything was built from scratch, including a robust custom order system, a sample pack marketplace, and a landing page for weekly pack giveaways.

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Projects

Open IPA

A real-time IPA transcription tool helping ~8.5k people a month learn how to pronounce French and Latin.

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Tone Sandbox

The home for a variety of experimental music apps, including a music sequencer, theremin emulator, MIDI piano, and Fast Fourier Transform visualizer.

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Listen Together

An open-source social music platform for friends to listen to music in sync with one another through Spotify.

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Serial

A minimal and snappy web-based RSS reader for YouTube videos.

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Languages

TypeScript

JavaScript

HTML

CSS

Python

SQL

Java

Gleam

Frameworks

React

Next.js

React Native

Astro

Node.js

Svelte

Solid.js

Technologies

PostgreSQL

SQLite

Supabase

Docker

Prisma

Stripe

Education

B.S. Computer Science

Loyola University Chicago

I was president of Loyola's computer science club Don’t Panic! during my senior year, helping to host events and foster community.

B.A. Music (Voice)

Loyola University Chicago

During my time at Loyola, I wrote an original choral piece and performed an hour-long senior recital with pieces in a variety of languages.

Awards and Press

Mention in The Hustle

July 7th, 2023

My theremin project was given a shout out in The Hustle, Hubspot's daily newsletter with 2M+ subscribers.

Hackathon Winner

June 14th, 2020

I was the winner of the "Happy at Home" track of the Same Home Different Hacks Hackathon with the first version of Listen Together, chosen out of 90+ submissions.