London · est. 2025 · solo founder

Milo
Mitchell-Brooks

15. Building blank — an AI-native trading terminal — and Pick Us A Winner, a creator-economy giveaway engine. Solo, shipping code.

  • 3 products live
  • 100k+ lines of code
  • 1 founder
  • ambition
currently

Shipping blank v1 — a Windows-native trading terminal, built with AI-assisted development tools.

§ 01 · what i'm building

Three products. One thesis.

Software that pays for the next piece of software. Each one ships standalone, each one cross-pollinates the next, each one is built by me from a Windows desktop with AI-assisted development tools and time outside school.

№ 01 live

blank

AI-native trading terminal · Windows · Mac · iPhone

An autonomous trading agent that reads the market the way a senior PM does — news, social, options flow, charts — and executes trades with adaptive cadence. Practice mode runs a £100 sandbox per user; live mode executes real money trades on Trading 212. The advisor learns from every closed trade. Each user's instance trades independently. 100k+ lines of code. Built solo. Currently in beta.

  • stackPython · Agent SDK · PySide6 · Swift
  • platformsWindows · macOS · iOS · cloud
useblank.ai
№ 02 live

Pick Us A Winner

Creator-economy giveaway engine

Built for a client who needed verifiable, auditable giveaways without paying subscription fees or giving data to third-party platforms. Instagram comment scraper (no API keys), follow/like proof verified at draw time, transparent winner-selection log creators can paste straight into their own livestream. Backend now offline; design portfolio remains viewable.

  • stackTypeScript · React · Express
  • statusLive design · backend archived
pickusawinner.com
№ 03 studio

certified random

Web development studio · parent company

The umbrella every product launches under. One founder, one brand, one design language. The studio site is an audit trail — visitors see what ships, what's mid-build, what's in the pipeline. Structured as a holding company so investors can see the company trajectory, not just the latest code push.

  • stackHTML · CSS · vanilla JavaScript
  • roleParent company · product umbrella
certifiedrandom.com
§ 02 · how i got here

Started with a navigation map and a backpack.
Got here writing 100k lines of code.

  1. 2025 Jan 15 – Jun 18 · age 14

    The beginning. DofE Bronze, coding as the skills section.

    Self-taught Python over four months to complete the Duke of Edinburgh Bronze Award's skills section. A free online course, a Windows machine, and an idea that I could automate boring stock research. Wrote my first scraper. Realised the bottleneck wasn't the language — it was that I didn't know what to ask it to do. This is where it all started.

  2. 2025 after

    AI-assisted development tools.

    Tools that turn "I don't know how" into a 20-minute conversation. The productivity gap between a teenager who uses these tools fluently and someone who doesn't is bigger than most professional gaps in any industry. I stopped worrying about writing every line by hand and started shipping specifications instead.

  3. 2025 age 15

    Shipping code, not typing code.

    Started writing specifications and reviewing diffs instead of typing every line. blank's 100k+ lines aren't written faster — they're directed. Parallelised the work so a solo founder can supervise multiple AI agents working in concert. Solo means solo strategy, not solo typing.

  4. 2026 now

    Three products. One studio. Building toward launch.

    blank goes public in July. Pick Us A Winner already runs live giveaways. Certified Random is the holding company that will outlive any one product. Looking for the right round — early, small, lean — to compress what would take three more years into one.

    recent commits
    loading from github…

§ 03 · the receipts

The output. Built solo.

Three products under one studio. Most repos are private — these numbers reflect what's actually been built, not what's public.

3 products shipped
100k+ lines of code · blank alone
5 languages · across products
1 founder

note · blank is 100k+ lines of code built in Python. Stack spans TypeScript, React, Express, PySide6, Swift.

§ 04 · why now

The leverage curve has bent.

A determined teenager with AI-assisted development tools now ships at the output of a small product team in 2020. The bottleneck is no longer how fast you can type or how many engineers you can hire — it's whether you can hold a clear specification in your head and review what the machines produce. That skill is age-blind.

blank is the bet that this is also true for trading. A retail trader on a Windows desktop, reading the same news the buy-side reads with adaptive cadence, can compete on signal — not on speed, not on capital — for the first time. blank exists to give them the workbench.

Pick Us A Winner is the cash-flow business that funds it. Certified Random is the holding company so the right deal structure works at the parent level, not the product level.

If any of this resonates and you're an investor at the pre-seed end of the curve — or you're at YC and read every application — reach me here. I reply within the day.

§ 05 · contact

Email is the channel.