01 · iPhone
iOS app development
Native iPhone apps that feel at home on the device, including camera, location and augmented reality.
Explore iOS app developmentIndependent UK software studio
Ship fast.Break nothing.App, web and smart contract development, done properly.
We build native iPhone apps, fast websites and web apps, the backends behind them, and Ethereum smart contracts, with the same care at every layer. You work directly with senior engineers, from a fixed-price first version to ongoing development.
- Booking projects from November 2026
- Replies within two working days
- in London
What we build
From the app in your pocket to the systems behind it.
02 · Web
Web development
Fast websites that rank well in search, and web apps with accounts, data and payments.
Explore web development03 · Backend
Backend development
The systems behind your product: APIs, integrations, data pipelines and automation.
Explore backend development04 · Ethereum
Smart contract development
Solidity contracts and DeFi protocols on Ethereum, tested thoroughly and ready for audit.
Explore smart contract developmentCase studies
Client work is confidential, so we describe the problem rather than the name.
Ethereum
Stablecoin and credit protocol
- Challenge
- Issue a stablecoin backed by reserves and by credit to vetted borrowers, without ever letting the books drift out of balance.
- Approach
- Credit markets with fixed and floating rates, tranched collateral that absorbs losses in order, and upgradeable contracts behind governance.
- Outcome
- Fuzz and invariant test suites run on every change; taken through an external audit and fix review.
- Solidity
- Foundry
- Invariant testing
Ethereum and layer 2s
Yield aggregator
- Challenge
- Earn the best available yield for depositors across many lending markets and exchanges, automatically.
- Approach
- Vaults with careful share accounting, strategies that harvest and compound on schedule, and keepers that act on time.
- Outcome
- Strategies running in production, harvesting for depositors around the clock.
- Solidity
- Vaults
- Automation
How we work
The same four stages on every project, scaled to the size of the job.
- 01
Discover
We learn about your users and goals, agree the scope of version one and quote a fixed price.
- 02
Design
Prototypes and technical designs before production code, so changes stay cheap.
- 03
Build
Short iterations with weekly progress and tests written alongside the code.
- 04
Ship
Launch, monitoring and App Store or deployment work, then improvements based on real use.
Why Reignark Labs
A small software studio for products that need to be done properly.
Product thinking
We think about your users, launch and what happens afterwards, not just the code.
Senior engineers only
You work directly with the people writing your software. No account managers.
Built to last
Typed, tested and documented code that can be maintained for years.
Plain communication
Clear written updates, honest estimates and jargon-free trade-offs.
Ways to work with us
From a one-off review to building your product end to end.
Product build
Fixed price, in milestones
A defined first version, scoped in discovery and delivered in stages.
Prototype sprint
1 week
Turn an idea into something you can show users or investors.
Ongoing development
Monthly
Steady engineering on a live product, from the same senior team.
Review and advice
Per engagement
Code and architecture reviews, technical due diligence or a second opinion.
Studio notes
What we've learned building software, written for the people who commission it.
Backend
Idempotent payment webhooks: handling duplicates, retries and out-of-order events
How to build a webhook handler that survives duplicate and out-of-order deliveries: signature checks, an event ID table, one transaction and an outbox.
- Webhooks
- Idempotency
- Payments
Smart contracts
One storage namespace per module: ERC-7201 in practice
How to give each module of an upgradeable Solidity protocol its own ERC-7201 storage namespace: naming, the erc7201 builtin, safe struct changes and tests.
- ERC-7201
- Storage layout
- Upgradeable contracts
Smart contracts
Solidity's layout at and erc7201: custom storage layouts explained
How Solidity's layout at specifier and the new erc7201 builtin move contract storage, how that differs from ERC-7201 namespaced structs, and the pitfalls.
- Solidity
- Storage layout
- Upgradeable contracts
How long would version one take?
Answer three quick questions and get a typical timeline and the way of working that usually suits it.
Frequently asked questions
How much does a project cost?
It depends on scope. After a discovery call we quote a fixed price for a defined first version, or a monthly rate for ongoing work.
Do you work with early-stage teams?
Yes, including founders who haven't written a line of code yet.
Do you build Android apps?
We specialise in iOS and the web. We'll talk through the options for Android case by case.
Where are you based?
We're registered in the UK and work remotely with teams around the world.
Have something you'd like built?
Tell us what you're building. We'll reply within two working days with questions, an approach and next steps.
Start a project