Tochi Mba

About

Tochi Mba. Call me Rex.

AI engineer and full-stack developer, working solo under the name REX Technologies. I build the kind of software I would want to depend on: services that refuse to store a credential, installers that need no admin rights, and the same four test gates in every repository.

Experience

  1. 2024 – present

    AI Engineer

    Jigsaw Create · London

    Architected and delivered Jigsaw Intelligence: a production multi-agent system on Azure that lets people query and change complex business diagrams in plain language.

    • A worklist orchestrator that coordinates more than 30 tools within WebRTC packet-size limits
    • A structured variable and template pipeline that keeps the model's context small
    • Deterministic search tools that hand the model structured data to reason over
    • A workflow engine with parallel, sequential and conditional steps, streaming results as they arrive
    • Fixed a live WebRTC connectivity issue that was blocking the AI in a client's enterprise environment
    • Delivered in seven months and shown as the Hero product at the British Legal Technology Forum
  2. 2025 – present

    Founder and sole engineer

    REX Technologies

    Design, build and ship the REX product line: the LUCY assistant hub and its service family, the weftai workflow runtime (npm and PyPI), Android Headless Mirror, Flint, textwire, chika and clyde. Every repository carries the same gates and the same visual system.

  3. Earlier

    Software Developer, internship

    Snave · Huddersfield

    Built Maia, an office automation chatbot in React on AWS for task management and team communication: responsive interfaces, secure and scalable storage, and features scoped directly with the people who would use them.

  4. Earlier

    Coding instructor and tutor

    Code Ninjas, Manchester · Software Academy, London

    Taught Python and web development to young learners with a hands-on curriculum I wrote, and tutored GCSE students in Python, JavaScript and web development.

Education

  1. 2020 – 2023

    BSc (Hons) Computer Science with Cybersecurity

    University of Huddersfield · First Class Honours

    Artificial Intelligence (A), Cybersecurity (A), Final Year Project (A).

  2. 2019 – 2020

    Foundation Year

    University of Huddersfield · Letter of Commendation

    Mathematics (A), Computer Science (A*), English (A). Class representative.

Recently shipped

  1. rexplayer v0.25.9 · rexplayer 0.25.9 · GitHub
  2. rexplayer #306 · Initialize pooled audio before resampler performance measurements
  3. rexplayer #305 · Version 0.25.9 so the release publishes
  4. rexplayer #304 · Edit and choose model-specific transcripts
  5. rexplayer #301 · Choose transcription quality from the caption rail
  6. rexplayer #302 · Keep model-labelled transcript SRT files beside media
  7. rexplayer #303 · Always resume media with a Start over action
  8. rexplayer v0.25.8 · rexplayer 0.25.8 · GitHub
  9. rexplayer #300 · Release 0.25.8 after AVI and playback-notice fixes
  10. rexplayer #298 · Clear stale playback errors when the queue advances

Skills

AI and agents
Agent orchestration, Declarative workflow plans, MCP (both directions), Claude, OpenAI, Ollama and 50+ providers, Memory, persona and retrieval design, Prompt-injection defence
Backend
Python 3.12+, FastAPI, TypeScript / Node, REST and OpenAPI, OAuth and credential vaults, SQL and durable event streams
Desktop and mobile
C# / .NET and WPF, Rust, Kotlin and Compose for TV, Android, DXGI and Media Foundation, ADB and scrcpy
Web
Vue and Nuxt, Vite, Chrome Extensions (MV3), Accessible, static-first sites, Playwright and Vitest
Engineering practice
100% branch coverage gates, Cross-language golden vectors, ADRs, GitHub Actions and OIDC, Self-updating installers, Security-first design