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henryforrest/README.md

Henry Forrest

Software engineer in London, building AI-driven products, with a deep interest in markets and finance.

Currently a junior software engineer at a London startup, building an AI receptionist agent and the mobile app that talks to it. Before that, Computer Science at the University of Exeter, with a dissertation on reinforcement learning for trading the S&P 500.

Portfolio · LinkedIn · CV

Selected work

Project What it is Links
Orbis A private contacts app for iPhone. Keep a Work and a Social profile, share a short code instead of your number, and every change syncs to the right people automatically. The app, a Firebase backend with sixteen Cloud Functions, and the website, all built solo. Source is private, as it's a live product holding user data. App Store · Case study
Market Brief Native iOS app that surfaces the equity metrics that actually matter: Sharpe ratio, max drawdown, P/E and market cap alongside live prices. Backed by a FastAPI service I built and deployed on Fly.io. App Store · Code · Backend · Case study
Investing for Everyone Final-year dissertation. A web platform where new investors deposit simulated funds and a PPO reinforcement-learning agent trades for them, with a built-in glossary to demystify the markets. Code · Case study
Perfect Circle Daily-challenge iOS game. One attempt a day to draw a perfect circle, scored 0 to 100 by geometric analysis. SwiftUI and Core Graphics, streaks and history, no ads. App Store · Code · Case study
0 to Hero University group project. A Django web app that gives students one sustainability challenge a day, scores them for doing it, and lets them spend the points on a virtual village. Team of five, two sprints. I built sign-up and login, the challenge-submission flow, the map and the profiles. Case study

Stack

  • Languages: Python, Swift, JavaScript / TypeScript, SQL, Java, C, C++
  • Frameworks: FastAPI, SwiftUI, React Native, Flask, Django
  • Cloud & data: AWS (DynamoDB, Cognito), Fly.io, Pandas, NumPy
  • Currently learning: Docker, AWS Solutions Architect

Outside work

Rugby for a local club, chess, golf, and a guitar I'm getting marginally less bad at.

Pinned Loading

  1. market-brief market-brief Public

    SwiftUI iOS app for analyst-grade stock metrics (Sharpe, max drawdown, P/E). Live on the App Store.

    Swift

  2. perfect-circle perfect-circle Public

    One attempt a day to draw a perfect circle, scored 0-100 by geometry. SwiftUI, live on App Store.

    Swift

  3. investing-for-everyone investing-for-everyone Public

    Flet web app where a PPO agent trades simulated funds on the S&P 500. BSc dissertation, Exeter 2025

    Python

  4. beat-the-cube beat-the-cube Public

    Daily minigames in React Native/Expo: one attempt per game per day, Firebase auth and a leaderboard

    JavaScript

  5. market-brief-api market-brief-api Public

    FastAPI backend for the Market Brief iOS app: Sharpe, drawdown, volatility and LLM stock briefs

    Python

  6. voice-receptionist-agent voice-receptionist-agent Public

    Voice AI receptionist for The Shard, built on LiveKit Agents (Deepgram, GPT-4.1 mini, Cartesia)

    Python