Your only constraint is the
speed and quality of your ideas.
The leverage changes everything about what’s possible: speed, quality, and cost.
2–4 weeks
Production-grade deliverables, not demos.
Fixed price
We carry the risk, not you.
Money back
We stand behind every engagement.
What We Do
Two ways to work with us. Fixed-price delivery or flexible advisory. No timesheets, no surprises, no lock-in.
Fixed Price Delivery
Discovery, prototypes, MVP builds, legacy migration, AI agents, due diligence, and security assessments. Scoped, quoted, and delivered in weeks. Money-back guarantee.
Fractional CTO
Senior technology and security leadership on a flexible monthly retainer. CTO-level guidance without the full-time hire.
Track Record
Technology leadership across payments, energy, cybersecurity, and capital markets.
Earthport
PaymentsGrew a 5-person startup into a £17Bn payments utility serving the world’s largest banks — acquired by Visa.
Moneycorp
Foreign ExchangeRe-architected a £24Bn payments platform. 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 radically transformed.
We've held the CTO and CIO roles. We know what good delivery looks like from the inside. That experience, combined with AI-native tooling, means we deliver faster and to a higher standard than you'd expect from a single engagement partner.
Background
20+ years as CTO and CIO across financial services, cybersecurity, and technology. Founded a ransomware response 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. No obligation, no timesheets.