London · est. 2025 · solo founder

Milo
Mitchell-Brooks

15. Building blank — an autonomous trading advisor — plus Smoke City (e-commerce for motorbike parts) and cr-engine (an AI-first IDE for making games). Solo, shipping code.

milomilomilomb@gmail.com
  • 4 products in flight
  • 100k+ lines of code
  • 1 founder
  • ∞ ambition
currently

Shipping blank v1 — an autonomous trading advisor across Windows, Mac, and iPhone.

§ 01 · what i'm building

Four products. One studio.

Software that pays for the next piece of software. Each one ships standalone, each one cross-pollinates the next, each one is built solo with AI-assisted development tools outside school.

№ 01 live

blank

Autonomous trading advisor · 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. It runs on your own machine against your own broker account, and the iPhone app is a remote for it. 100k+ lines of code. Built solo. Currently in beta.

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

Smoke City Supplies

E-commerce for motorcycle & scooter parts

A full e-commerce platform built for a real family-run bike shop. Customer storefront with category browsing, search, and Stripe checkout; admin panel with barcode-assisted inventory, order processing, invoice emailing, and Royal Mail shipping workflows. AI-powered bike finder for part compatibility. Built end-to-end — backend, frontend, ops tooling — so the shop actually runs on it.

  • stackReact · TypeScript · Express · Postgres · Stripe
  • statusLive · serving a real bike shop
smoke city supplies
№ 03 in build

cr-engine

AI-first IDE for making games · C++20 · Unreal · Blender

A development environment for the era where AI agents direct the scene. Rather than building its own renderer, it drives the tools a studio already uses: it speaks to Unreal Engine 5 and Blender over MCP, so an LLM can build a world, light it, source or model the assets and author gameplay through conversation instead of a mouse. A C++20 core with a React/TypeScript shell. Built solo.

  • stackC++20 · React · MCP · Unreal 5 · Blender
  • statusIn active development
№ 04 live

Pick Us A Winner

Giveaway generator for creators

A giveaway generator made for creators, with creators. Runs Instagram giveaways end to end — pulls entrants from a post's comments, filters duplicates and non-followers, and draws a verifiable winner. The cash-flow product that funds the rest.

  • stackTypeScript · React · Express
  • statusLive · for creators
pickusawinner.com
the umbrella

certified random

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

the studio
§ 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

    One studio. Building toward launch.

    blank is live in open beta. Smoke City Supplies already serves a real bike shop. cr-engine is being built for the AI-directed games to come. 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.

§ 03 · the receipts

The output. Built solo.

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

4 products in flight
100k+ lines of code · blank alone
6 languages · across products
1 founder

note · blank is 100k+ lines of code, mostly Python. Across products the languages span Python, C++, TypeScript, Swift and JavaScript; frameworks include React, Express, PySide6 and SwiftUI.

§ 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. An independent trader with blank as their advisor, 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.

email milomilomilomb@gmail.com studio certified random