Oscar Layzell oscar.layzell@hotmail.com

I design and ship web and mobile products with AI tooling.

I'm a Technical Account Manager at Mastercard Dynamic Yield and a former front-end developer. For eight years I've worked between enterprise customers and engineering teams in banking software and e-commerce SaaS, and I'm moving into a role that combines product, engineering and design.

Halo Cooking Book

A recipe app. “Your cookbook, in the clouds.”

Solo builder
Oct 2026 to present

For
Young adults and working professionals who enjoy cooking.
What it does
  • Imports recipes from a pasted page or a photo, using AI.
  • Works out nutrition per serving and rescales it with the number of diners.
  • Scans receipts to learn what you pay, prices each serving, and flags whether today's price is good against past purchases.
  • Keeps permanent copies of recipes, with search, labels, favourites and your own photos.
  • Passwordless sign-in by email.
Built with
Claude Projects, Supabase, Vercel and Cloudflare. Payments through Stripe on the web and RevenueCat in the iPhone app.
Where it stands

Live

On the web, the App Store and the Chrome Web Store. Subscriptions are live at £3.99 a month or £39.99 a year, with a 7-day free trial.

Halo Business

Serving costs and margins for food businesses, built on the Halo Cooking Book costing engine.

Solo builder
2026 to present

For
Food businesses that sell meal boxes.
What it does
  • Costs each serving from supplier invoices, which you can snap, upload or forward, with waste included.
  • Shows margins by box, day and week, with the reasons they changed.
  • Shop mode sits beside supplier websites during the weekly order and goes one item at a time with the price to beat. What you buy feeds back into recipe margins.
  • Reusable templates for weekly planning.
Built as
A web app and a Chrome extension, reusing the costing engine from Halo Cooking Book.
Where it stands

Built, not yet used by a business

The features work with demo data, and the site has an interactive demo: Corner Kitchen's Wednesday shop. I've prepared a pitch deck for a prospective design partner and am approaching them in November 2026.

Iteros

A goal-setting app for runners.

Co-founder
Sep 2026 to present

I'm a keen runner myself.

For
Detail-oriented runners who want to set and reach running goals.
My part
Part building, part decisions on launching and growing the business, and the brand direction.
Where it stands

In build

The team has hired a marketing manager and is aiming to ship early in 2027.

How I work

Experience

  1. Nov 2023 to present

    Senior Analyst, Technical Account Manager

    Mastercard Dynamic Yield, London

    30 to 40 enterprise accounts across EMEA and APAC, worth more than 4m in ARR, across e-commerce and financial institutions. Global Customer Success awards for Most Onboardings and Least Churn, 2025.

  2. Jul 2021 to Nov 2023

    Software Consultant

    Sopra Banking Software, London

    Restyled the Front Office Portal, web and app, in each prospect's branding for pre-sales demos (HTML, SASS/CSS, JSON) and packaged the app as a TestFlight build. Produced more than 10 tailored demo packs. Promoted after a strong year of billable revenue.

  3. Jul 2019 to Jun 2021

    Junior Software Consultant

    Sopra Banking Software, Hertfordshire

    One of two consultants on a consumer bank's go-live of the front-end savings solution. Owned web analytics and a roadmap of add-on recommendations.

  4. Jul 2018 to Jun 2019

    Front End Developer (Apprenticeship)

    Sopra Banking Software, Hertfordshire

    Angular UI components and JSON-driven content in TypeScript, HTML and SASS for mortgage and savings journeys.

Education

  • Rudolf Steiner School: Economics, English and History of Art, 2015 to 2018
  • Sir John Lawes School: 9 GCSEs, A* to C

Outside work

I'm a keen runner, with more than 2,000 km run so far in 2026.

I host Outside Arsenal, an Arsenal transfer podcast that runs during transfer windows. I built a small tool that processes each recording and adds the intro and outro music.

Get in touch

Based in London.