Alex Bristow

Alex Bristow

For 8 years I've built software that teams depend on to run streaming operations, respond to incidents and manage cloud costs, and features at Ocado for grocery retailers serving millions of customers a week. I start with the people doing the work and how it really gets done, then design, build and run what they need. I care about details, like how a slow screen feels and whether a number is right before it reaches leadership. Since 2024 much of my work has been in GenAI. I build with coding agents every day and hold their output to the same standard as my own.

Role
Senior product engineer
Email
hello@alexbristow.com
GitHub
github.com/albri
LinkedIn
linkedin.com/in/alex-bristow
Based in
London, UK

Experience

2023 – now

Sky · NBCUniversal

Senior Developer

Employed by Sky, mostly embedded in NBCUniversal Global Operations, which keeps Peacock and NBCUniversal's other streaming services running.

  • GenAI platform for live operations. Led an internal assistant platform for operations and incident teams, from its first version for the Paris 2024 Olympics. It reached 150+ active users across 6 operations teams and about 78,000 conversations, and supported incident teams through Super Bowl LX and the 2026 Winter Olympics. Led its product, design and front end.
  • Designed and built its interface: streaming chat, a prompt playground with saved versions, charts and diagrams in answers, and a widget that puts the assistant inside other tools.
  • Built its evaluation harness: about 800 golden questions, scored by an LLM judge, that test retrieval (indexes, columns, timezones) as well as the answers. It tracked answer accuracy rising from 82% to 98.5%, and gave stakeholders a weekly quality score.
  • Made the model's work easy to check: a live view of each step an agent takes, editable drafts with version history, and a warning on answers without sources. Kept confidence scores out of answers, and sent low-confidence ones to an analyst for review instead.
  • Alerting portal. Product lead for the portal that up to 1,000 engineers across Sky and NBCUniversal's streaming services use to handle 30,000 to 40,000 alerts a day. Responsible for its user experience and front end. Made that volume quick to search and easy to understand. Helped cut mean time to resolve by about 75%.
  • FinOps platform. An in-house tool, along the lines of Cloudability, that the FinOps team uses to find and track cloud savings. Built and run it single-handed, from the infrastructure and database to the interface, and had it live within 3 months. It maps spend to the business, recommends reserved-instance purchases, prices new infrastructure before it's built, and takes engineers through each saving, with GenAI drafting the follow-up. It has identified more than £1m in savings.
  • Developer platform hub. Built the first version in about 3 days with coding agents and still write most of it. It puts the department's documentation in one place for the first time, for people and for agents through skills and MCP servers, and handles work requests, the roadmap and self-service provisioning for the department's 15 platform products. About 300 people use it each month.
  • Internal hosting for agent-built sites. Led a platform inspired by Shopify's Quick: coding agents publish static sites in one step and share them inside the company, behind single sign-on with role-based access and a consistent look. It now hosts 1,000+ sites, such as visual summaries of pull requests. Built its admin console and drag-and-drop publishing, and rolled it out to teams.
  • Across the team. Tech lead for the team's GenAI work from late 2024. Led 2 front-end engineers over several years, and groups of 4 to 6 on larger projects.
  • Test new coding tools and models before the wider business gets them, and helped choose the ones it adopted (Augment, then Cursor). Built the team's shared library of agent skills.
2022 – 2023

Ocado Group

Senior Software Engineer

  • Delivered the Recipes feature end to end for 10+ grocery retailers from Japan to Sweden and France, serving millions of customers a week. Built it for each retailer's languages and to strict accessibility and performance standards. Led 2 junior engineers alongside the back-end and mobile teams.
  • Led the migration from Universal Analytics to GA4 across the Ocado Smart Platform for about 100 engineers, with no gap in measurement at switch-off.
2018 – 2022

Sky

Front End Developer, then Senior Front End Developer

  • Built the tools Sky used to monitor viewing and streaming health through the launches of Peacock, SkyShowtime and Showmax: a React Native app for the executive team and a dashboard used across the company.
  • Built the analytics dashboard for a mobile network launch, and a React starter adopted by dozens of teams.
2014 – 2018

SPAR UK

Graduate Buyer, then Trading Manager

  • Responsible for a category worth about £120m, covering supplier negotiations, own-label launches and a small team.
  • Mapped how promotions were really run, then learnt React and Node in my evenings to build Dealio as a replacement. It led to my move into software.

Projects

2026

nxk

An open-source skill that lets coding agents put questions to a crowd of simulated people.

SKILL.md, PersonaGen, Jev, or another answering model

2025–26

PersonaGen

Synthetic people for the UK and the US, each with 237 facts that fit together, built on published statistics.

Rust, Python, TypeScript, TanStack Start, Cloudflare Workers, Railway, PostgreSQL

2025–26

mdplane

An open-source shared worklog for coding agents on different tools and machines.

Cloudflare Workers, Durable Objects, SQLite, Hono, TypeScript, OpenAPI, Zod, lit-html, Playwright

2023–26

Draftastic

Live team picking and tournaments for clubs, schools and events, on a big screen and everyone's phone.

Cloudflare Workers, Durable Objects, D1, R2, Queues, TanStack Start, React, TypeScript, Drizzle, Better Auth, fast-check, Playwright

Skills

AI
LLM evals, RAG, agents and tool use, MCP, streaming interfaces, Anthropic and OpenAI APIs, OpenRouter, Vercel and Cloudflare AI gateways, Claude Code, Codex, Cursor
Front end
TypeScript, JavaScript, React, Next.js, TanStack Start and Query, React Native and Expo, Tailwind, WebSockets, accessibility, design systems, Figma
Server and data
Node, Bun, tRPC, GraphQL, PostgreSQL, Prisma, Drizzle, Cloudflare Workers and Durable Objects
Testing and research
Vitest, Testing Library, Playwright, user research

Education

2011 – 2014

University of the West of England, Bristol

BA Business Studies