# Patrick Vieira

Platform engineer in London (not the footballer of the same name). Canonical page: https://patrickjv.com/

**Platform Engineer** · London, United Kingdom

> I build the platforms, infrastructure and identity systems that let a small team ship like a large one — with AI agents held to the same standard as people.

## About

I design and run the foundations other engineers build on: architecture, infrastructure, identity and security, and the engineering standards that hold them together.

Much of my recent work is about making AI-assisted delivery trustworthy. I hold agent-written code to the same standard as anyone's: a written spec before code, tests first, a hook that stops an agent finishing until typecheck, lint and tests pass, and adversarial review by a model from a second vendor.

I do my best work where a small team needs to operate like a much larger one: setting technical direction through architecture decision records, choosing platforms on measured evidence, and automating the work nobody should do by hand.

## In figures

- **1,400+** — merged pull requests in ten months
- **40** — repositories
- **44** — architecture decision records authored
- **~10×** — lower monthly hosting bill after a move to Cloudflare Workers

## Work

### Internal developer platform for AI-assisted delivery

A Claude Code platform for a whole engineering team: a plugin of 21 skills and 3 hook events for spec-first authoring, test-driven implementation and cross-vendor adversarial review, plus a versioned engineering-standards baseline that fans out automatically to about 26 repositories.

Tags: Agentic AI · Developer Experience · CI/CD

### Agent execution and evaluation platform

An agent execution and evaluation platform. Coding agents take specified work, build in sandboxed containers with per-run credentials, pass rubric-graded review gates and merge on automated criteria. The platform choice was settled by a measured spike: 3.3 s cold start, 32 ms warm.

Tags: AI Agents · Cloudflare Containers · Queues

### Passkey and verifiable-credential identity

Built from scratch: did:web identity with WebAuthn passkeys and W3C Verifiable Credentials, in production as the sign-in for a suite of internal applications, with federation to self-hosted DIDs — including this domain.

Tags: WebAuthn · did:web · Verifiable Credentials

### Infrastructure as code

Cloud and SaaS infrastructure run through Terraform Cloud with GitOps — plan on pull request, apply on merge, daily drift detection — across GitHub, Cloudflare, Kafka, Databricks and observability. AWS and Microsoft 365 as code; joiners and leavers automated.

Tags: Terraform · GitOps · Cloudflare

### On-premises speech intelligence

A meeting-transcription pipeline on an NVIDIA DGX Spark — NeMo ASR, diarisation and voiceprint speaker naming — for audio that cannot leave the building.

Tags: NVIDIA NeMo · ASR · On-prem AI

## Side projects

### Kaizen Kingdom

An adaptive maths learning platform, built from what I saw in the classroom: the gap between what teachers need and what edtech actually provides.

### Marine-weather agent

An agent that emails forecasts to a sailing yacht at sea.

## Background

I studied Electrical and Electronic Engineering (BEng), then trained as a maths teacher (PGCE, UCL) and taught secondary mathematics for two years. In 2021 I taught myself full-stack development and moved into software, and I have worked in platform engineering since 2023.

Teaching shaped how I build tooling: it only counts if people pick it up and use it well.

## Skills

- Platform Engineering
- Agentic AI
- Developer Experience
- Infrastructure as Code
- TypeScript
- Python
- Cloudflare
- Terraform
- WebAuthn
- Test-Driven Development

## Quick answers

### Who is Patrick Vieira, the engineer?

Patrick Vieira is a platform engineer based in London — not the footballer of the same name. He designs and runs the foundations other engineers build on: architecture, infrastructure, identity and security.

### What does he specialise in?

Platform engineering, AI-assisted software delivery, infrastructure as code and passkey-based identity, mainly with TypeScript, Python, Cloudflare and Terraform.

### What has he built?

An internal developer platform for AI-assisted delivery, an agent execution and evaluation platform, a passkey and verifiable-credential identity system, infrastructure as code across cloud and SaaS, and an on-premises speech pipeline.

### How does he make AI-written code trustworthy?

By holding it to the same standard as anyone's: a written spec before code, tests first, a hook that stops an agent finishing until typecheck, lint and tests pass, and adversarial review by a model from a second vendor.

### How can I contact him?

Through LinkedIn or GitHub — links at the top of this page.

## Links

- [LinkedIn](https://www.linkedin.com/in/patrickvieira/)
- [GitHub](https://github.com/PVieira04)