SaaS Development Company in London
We build revenue-generating SaaS platforms for London founders and product teams — from first paying customer to enterprise-scale. UK-timezone, fixed-price, senior developers.
What We Deliver
London is one of Europe's leading SaaS hubs, and InfinityStack is the development partner trusted by London's most ambitious founders. We design and build multi-tenant SaaS platforms with Stripe subscription billing, role-based access control, admin dashboards, and the infrastructure to scale from 10 to 10,000 customers without rewriting your codebase.
- Multi-tenant SaaS architecture from day one
- Stripe Billing and subscription management built-in
- UK GDPR-compliant data handling and consent flows
- Role-based access control (RBAC) and SSO/SAML ready
- SOC 2-aware infrastructure design for enterprise sales
- London timezone standups — GMT/BST availability
Services & Capabilities
Multi-Tenant Architecture
Properly isolated data architecture that lets you onboard thousands of UK and European customers on a single codebase.
Stripe Subscription Billing
Complete Stripe integration including trials, usage-based billing, upgrades/downgrades, and dunning management for UK and EU customers.
SaaS Admin Dashboard
Customer management, usage analytics, plan administration, and billing controls — everything your London team needs to run the business.
Authentication & SSO
OAuth, magic links, Google/Microsoft SSO, and SAML 2.0 for the enterprise London clients your SaaS will eventually land.
API-First Architecture
RESTful and GraphQL APIs that allow your London customers to build integrations and open your platform to ecosystem partners.
Scalable Infrastructure
Vercel, AWS, or GCP deployments with auto-scaling, CDN edge delivery, and EU data residency for GDPR compliance.
How We Work
SaaS Discovery
We map your ICP, pricing model, core user flows, and UK competitive landscape in a structured discovery session.
Architecture Design
System design document covering data models, multi-tenancy strategy, billing flows, and API structure.
MVP Delivery
A shippable MVP in 10–14 weeks that gets your first London customers using the product.
Beta & Feedback Loop
We support your beta period, implementing user feedback and fixing issues rapidly.
Scale Engineering
Performance optimisation, infrastructure scaling, and enterprise feature development as you grow.
Ongoing Partnership
Monthly retainer options to keep your London SaaS product competitive and technically healthy.
Technologies We Use
Frequently Asked Questions
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