FinTech.
Financial technology operates under intense scrutiny. Every transaction, every data point, every system decision carries regulatory weight and investor attention.
The hard truth: most technology leaders underestimate the complexity of building compliant, scalable financial infrastructure until it's too late.
Scaling secure payment infrastructure
The Challenge
A Series B payments company needed to scale from processing £10M to £100M monthly while achieving PCI-DSS Level 1 compliance and maintaining sub-second transaction times.
Our Approach
We redesigned their payment processing architecture, implemented comprehensive security controls, and built the engineering team's capability to maintain compliance independently.
The Result
Achieved PCI-DSS certification in 4 months, scaled to £150M monthly volume, and reduced transaction latency by 60%. The company successfully raised Series C.
What makes FinTech different
Regulatory complexity across multiple jurisdictions
Real-time fraud detection at scale
Banking partner integration requirements
Customer trust in handling money
How we support FinTech growth
For Investors
Due diligence on payment infrastructure, compliance readiness assessment, and technology scalability analysis for FinTech investments.
For FinTech Founders
Fractional CTO support, regulatory compliance guidance, and hands-on help building secure, scalable financial infrastructure.
Why choose Rational Partners
Regulatory Expertise
We've navigated FCA authorisation, PCI-DSS, and SOC 2 compliance across multiple FinTech businesses.
Operational Experience
Our team has built and scaled payment systems processing billions in transaction volume.
Investor Perspective
We understand what PE and VC investors look for in FinTech technology due diligence.
30-minute initial discussion to understand your requirements, timeline and key concerns.