Oliver Geer

o@ogeer.org ogeer.org; codeberg.org/ogeer; github.com/WebCoder49East Sussex / Oxford, UK

Education

University of Oxford: MCompPhil/BA Computer Science and PhilosophyAt Hertford College. In progress. Distinction in first year exams.2025-10 – 2028-06 / 2029-06

Brighton College:
A-LevelsAll Grade A*: Further Maths, Maths, Computer Science, Physics, Spanish, and an EPQ in Machine Unlearning.2023-09 – 2025-06

GCSEsAll Grade 9: Chinese, History, and 9 others.2021-09 – 2023-06

Experience

Selected Software

code-input.js: Maintainer. JavaScript, CSS, DOM, Git. (MIT)2021-09 – now

• Founded and continuously maintain a 230+-star free and open-source frontend web component used by Google and Swiss Federal Railways among others.
• Responded to many public queries including implementing new plugins, and merged code or documentation from 9 contributors.
• Aiming for wide accessibility and future-proofing, made the library differ from other syntax highlighted plaintext editors by being lightweight, progressively enhanced, and allowing both selectively choice of the included functionality and the syntax highlighting to be swapped for practically any (non-editing) library.

Teclat (in progress): Founder. Pyodide, Yjs, JavaScript, Rust. (AGPL-3.0-or-later)2025-06 – now

• After seeing the need among my schoolteachers, began developing a local-first, browser-based, collaborative, multi-file code editor and runner, in close email collaboration with them.
• Started developing a lightweight, self-hostable backend for project persistence and sharing, using Rust and Yrs.

Competitive Programming: Python, C++. (MPL-2.0)2021-10 – 2023-12

• Participated in the British Informatics Olympiad in Python (72% overall and 100% in part (a)s) then in C++ (lower score due to careless integer overflow).
• Participated in the British Algorithmic Olympiad once.
• My solutions to practise questions are here.

NoteNimble (proof of concept): Creator. Python, Numpy, Qt. (GPL-3.0-or-later)2024-05 – 2025-08

• Designed and developed a robust, cross-platform graphical desktop application with full undo/redo and project saving capabilities.
• Wrote code to open, process, visualise, convert and save musical audio and MIDI notes (using an external library for note identification, due to time constraints).

FTC & FRC Robotics: Programmer. Java, Git. See Positions below.2022-05 – 2025-03

Dolphins of the Deep: Programmer. Java, Minecraft. (LGPL-3.0-or-later)2021-11 – 2022-11

Various Libre Software Projects:Contributor, Translator. 2024-08 – now

• Made pull requests (that were more than typo fixes) in Mobilizon, KDE Plasma, Faircamp and Cryptpad.

Positions

FLOxford: Co-Organiser, with Dr. Laura Fortunato and others.2026-01 – now

• Sent the first message to re-ignite a dormant mailing list. Organised and advertised talks and workshops about a variety of free, libre, and open-source software topics.
• Collaborated with local and international figures for in-person and online events.
• Invited everyone from across the city.

Digital Asset Ltd (local): Paid Work. "Agentic" (LLM-Gen-AI) software development.2026-07 – 2026-09

Astro Pi: Mission Space Lab: Participant ×2 years; Co-Organiser ×1 year.2024-09 – 2025-06

• In teams, devised, coded, and analysed scientific experiments. GitHub/apollo-1845; "knowNDVI": report, code, code. "Plankton": report, code, code.

Uckfield Repair Café: Volunteer,  Repairer (IT/Computers).2024-07 – now, intermittently

Gear Zero Robotics: Head of Programming, teaching ~15 programmers. (Participated 2+ years before and 1 year after)2022-05 – 2025-06

• Teaching focused on the long-term: not just training for our upcoming competition, but also on educating future programming leaders, general programming and DevOps skills, and research for future years' competitions.

Sussex Support Service: Volunteer, Saturday Social.early 2023 – 2024

Digital Asset Ltd (local): Work. Human software development (with LangChain).2023-07

Publications

Extended Project Qualification: Is There A Place For Approximate Unlearning In Production-Headed Neural Networks?2025-04

• https://ogeer.org/epq.

CSS-Tricks: Creating an Editable Textarea That Supports Syntax-Highlighted Code, a tutorial.2021-04

• https://css-tricks.com/creating-an-editable-textarea-that-supports-syntax-highlighted-code/.

Current Skills

• Programming languages: JavaScript, Python, Java, HTML/CSS, LaTeX, C++; less so: Haskell, Scala.
• Programming areas: Web applications (experienced in vanilla JavaScript; beginner at Vue/Nuxt); PySide (Qt) desktop applications; Libraries (with tests).
• Technical software: Console management via Bash of Debian GNU/Linux; Apache Web Server.
• Operating systems: Debian GNU/Linux, KDE Plasma; Android; Past experience with postmarketOS (Phosh), Windows 10/11, and macOS...
• Application software: Kdenlive (video editor); Inkscape (vector editor); LibreOffice (office suite); more...
• Natural languages: British English (Native), Spanish (Intermediate), Mandarin & Simplified Chinese (Rusty).
• Music: Piano (Grade 8), Traditional music notation, Guitar tab notation.
• Other: Free, libre, and open-source software licensing.

References

Available on request.