London area, UK
Kyle Olmstead
Senior Full-Stack Engineer / Building for the web since 2006
Summary
I'm Kyle Olmstead, a senior full-stack engineer. I've spent the past four years at OffSec, the company behind Kali Linux.
I started in the PSP and iPhone hacking scene. Before I turned 18, I had co-founded OneHitGamer.com, a game-hacking community that grew past 300k registered users, shipped PSP homebrew with 600k+ downloads, and written the SoldierX paper on dumping and patching iPhone game memory.
At OffSec I led the offsec.com rebrand (1M+ monthly page views), owned the SvelteKit checkout on portal.offsec.com, and built the Kali Linux 10 Year competition, which served 1M+ requests on a $5 server.
Experience
Senior Full-Stack Engineer
Led the offsec.com rebrand (1M+ monthly page views) and owned the SvelteKit checkout on portal.offsec.com, including its analytics and conversion tracking. Shipped location-based discounts across five services and fixed a payment-bypass flaw in the payments API. Hired and trained a successor engineer over a six-month handover, and built an internal Claude Code plugin (30+ skills, 17 agents).
Senior Full-Stack Engineer
Shipped 100+ client websites, custom WordPress themes and plugins, and headless WordPress apps in React.
Volunteer Engineer
Built an Immutable X API wrapper, an NFT rarity tool, and a Discord bot for an early Immutable X NFT project.
Founder and Full-Stack Engineer
Built a cloud platform for cryptocurrency-mining investors, backed by $100k raised from five investors.
Senior Marketing Operations
Ran 25+ e-commerce sites with sub-two-second load times. Amazon sales and Facebook Pixel campaigns brought in $500k in one December.
Dev & Marketing Operations
Built a meal-prep subscription site with payments. Subscriptions grew from 28 to 200+ through the site and marketing.
Sys Admin
Managed 100+ employee computers plus Windows and Linux servers, virtualization, an Exchange migration, firewalls, and disaster recovery.
Electronics Repair Specialist
Repaired computers and electronics, handled customer support, and fixed software remotely.
Co-founder
Co-founded a game-hacking community that grew past 300k registered users.
Projects
OffSec rebrand
Replaced a decade-old PHP site with Astro, Svelte, and Tailwind on Cloudflare Workers, backed by a headless CMS with GraphQL.
Kali Linux 10 Year Competition
Hacking competition app built in two weeks. Served 1M+ requests during the event from a $5 Linode server.
Bodies By Lawrence
Fitness team website. Designed in Figma, built in Astro, Svelte, and Tailwind.
OffSec checkout
Idempotent multistep Stripe checkout in SvelteKit and EffectTS, with Vitest and Playwright tests.
NFT rarity tool
Rarity rankings for Immutable X NFTs with passwordless wallet sign-in.
Crew scheduling suite
Drag-and-drop job scheduling in React on the WordPress REST API.
Open source
gamemode-bar
Native Swift menu-bar app that forces macOS Game Mode and drops AirDrop (AWDL) for emulators, streaming, and AirPlay.
jitpit-router
Experimental PHP 8 gateway that builds and starts local Bun services only when a request needs them.
skill-doctor
Audits Claude Code skills into one prioritised report.
cmux-1password
Shell-first 1Password picker for tmux and cmux that sends passwords or OTPs to the active pane.
quick-question
Bun CLI that pipes noisy command output (tests, diffs, logs) through a small local or hosted LLM so agents read only what matters.