Uneconomic. Infeasible. Impossible.Now just software.
Frontier models collapsed the cost of building well, brought ambitious scope within reach, and crossed the reasoning threshold once reserved for human experts. Our AI-native software engineering practice turns that into production-grade software, secure and regulation-ready, delivered in weeks at a fixed price and guaranteed against a signed definition of done.
The best software teams used to be seven people. Now they're one or two, plus AI.
Read the argument in fullFour ways in. One standard of delivery.
Fixed price wherever the scope is known. Reserved senior capacity where you need ongoing judgment. Always a signed done-test, always the delivery risk on us.
Build
Production software, fixed price, and we deliver the signed done-test in full or you don't pay. Discovery, prototypes, MVP builds, legacy migration, and AI features, delivered in weeks.
Advise
Reserved senior capacity on a monthly retainer, at three commitment levels. Technology and security judgment without the full-time hire. Sometimes called a fractional CTO.
Assess
Technical due diligence, security assessment, and AI-readiness review. Fixed-price deliverables you can put in front of a board, an investor, or a regulator.
Founder Track Record
Two decades in CTO and CIO roles before Mangrove, across payments, energy, cybersecurity, and capital markets.
Earthport
PaymentsGrew a 5-person startup into a payments utility handling £17bn of payment flows for the world’s largest banks. Acquired by Visa.
Moneycorp
Foreign ExchangeRe-architected a payments platform handling £24bn annual volume. 200% volume growth, 900% payments EBITDA growth, doubled customer conversion.
Spark / Ovo
EnergyTransformed a legacy energy provider into a digital-first operation. 300%+ digital growth, then led the technology integration when Ovo acquired.
Euroclear
Capital MarketsProgramme delivery across core clearing and settlement systems processing over a quadrillion dollars annually.
Multiple PE / VC Funds
Due DiligenceTechnology due diligence across multiple private equity and venture capital investments, assessing architecture, team capability, and technical debt.
Cynergy Bank
BankingData management and GDPR compliance programme for a digital challenger bank. Legacy-to-modern data architecture.
Why Mangrove
20 years building software.
Now delivered in weeks.
Kevin has held the CTO and CIO roles and knows what good delivery looks like from the inside. That experience means delivery faster and to a higher standard than the traditional route to the same outcome.
Background
Founded and led by Kevin Maguire, 20+ years as a CTO and CIO across financial services, cybersecurity, and payments. Founded a ransomware defence startup. Built and shipped production systems at every scale from seed-stage to enterprise.
Sectors
Have a project in mind?
Send us your spec and we'll come back with a fixed-price proposal against a signed done-test. No obligation.