TimerStack
Flagship product
Build and run sequences of labelled timers as one stack, with music, HealthKit stats and AI-generated routines. iPhone, iPad and Apple Watch.
Designed · Built · Shipped
Senior iOS
engineer.
I design, build and ship native Apple apps on my own, from the first commit to the App Store listing and the support inbox.
4 live on the App Store · 2 shipping
01
The apps
Six built solo
Aura Pool
Pool care
Log a water reading and get the exact chemical dose for your pool's volume, safe step-by-step treatment plans with wait timers, and weather-aware chlorine advice. Everything stays on the device.
Bark Back
Pet behaviour
Listens for a dog's bark and plays that same bark back within half a second, filming the reaction as a share-ready clip. On-device sound classification, with a volume ceiling, cooldowns and session limits that no purchase can loosen.
Coming soon
PoeticÁI
Creative AI
Set four dials; a poet, a topic, a form and a tone; and it writes a poem to keep, edit, illustrate with AI art and share as a card. One-off credits rather than a subscription.
bluetooth.itch
Diagnostics utility
A CoreBluetooth scanner for IoT work. Live signal graphs, a radar proximity finder for tracking down hardware, and full inspection of advertisement data, services and characteristics.
UI Color Palette Designer
Design tooling
Builds a complete interface palette from two sliders. Colours are generated in OKLCH, every pairing is graded live against WCAG 2.1, and the palette is simulated through four kinds of colour vision deficiency. Exports to CSS, SwiftUI or Android XML.
02
About
I am a senior iOS engineer with six years of production experience, currently on the core iOS team at OANDA, where I led the migration of the flagship crypto trading apps from legacy UIKit to a modern SwiftUI architecture.
Before engineering I spent twelve years co-founding and running a marketing agency of more than twenty people. That is the part of my background that shows up in the apps: scoping, deciding what not to build, and getting things finished.
Alongside the day job I have designed, built and shipped six iOS apps on my own. Not just the code: the icons, the App Store listings, the marketing sites, the privacy policies and the support emails. Applied AI runs through several of them, both as product features and as part of how I work.
I write about how each one actually gets made, including the parts that break, as British Dev Diary. Studio and client work lives separately at itch.studio.
- Based
- Farnham, England
- Currently
- iOS Developer, OANDA
- Focus
- Native Apple & applied AI
- Platforms
- iOS, iPadOS, watchOS
- Shipped
- 6 apps solo
- Writing
- @britishdevdiary
03
Experience
Full history in the CV
-
Oct 2023 – Present
iOS Developer
OANDA, formerly Coinpass
Core iOS team on the crypto trading apps. Led the move from legacy UIKit to SwiftUI, designed the RESTful networking layer and a custom dependency injection container, and introduced SwiftLint, a mobile style guide and tighter Git-flow.
-
Jan 2019 – Oct 2023
iOS Developer, contract
Various clients
Technical fixes, UI work and search filter optimisation for brands including Cazoo, Oja, Glisser and Allplants. Supported App Store submissions for more than fifteen international clients, usually dropping into an unfamiliar codebase on a short deadline.
-
2006 – 2018
Co-Founder & Operations Director
Hotcow Ltd
Co-founded and scaled a marketing agency to a team of twenty-plus, delivering large-scale PR and product campaigns for global brands. Owned resource management, financial planning and stakeholder relationships.
-
1997 – 2006
Systems & web engineering
BBC, PwC, MTV, freelance
Third-line support and application rollout scripting, alongside freelance LAMP development including custom payment processing services.
04
Elsewhere
Get in touch
Building something on Apple platforms?
Whether it is a senior iOS role, a product that needs shipping, or a question about one of the apps, email is the fastest way to reach me.