custom software development agency
Custom Software Development, Engineered to Be Inherited
A UK custom software development company that builds bespoke, production-grade systems to a verifiable standard — every material decision recorded, and an asset your next CTO can inherit without archaeology.
What it is
Custom software development, done our way, means a bespoke system built against a named engineering standard rather than assembled and hoped for. Most software engagements fail quietly — not at launch, but eighteen months later, when the original team is gone, nothing is documented, and a security review surfaces problems nobody can trace to a decision. We build to make that outcome impossible: modular, domain-separated, multi-tenant architecture, with the decision trail, threat model, and runbook produced as you go — not reconstructed after the fact.
What’s included
Modular, multi-tenant architecture
Domain-separated services designed to change safely — not a monolith that resists every edit.
OWASP ASVS Level 2 engineering
Role-based access with immutable audit logging, and SAST, DAST, and dependency scanning running in CI.
Infrastructure as Code
Every environment reproducible from code, with defined RPO/RTO and automated backups.
Automated tests with enforced coverage
Structured logging, metrics, error-tracking, and alerting so failures surface before customers notice.
The Governance Pack
Architecture Decision Record, Threat Model, Security Posture Document, Operational Runbook, and Forensic Handover — the evidence an auditor or a new CTO will ask for.
Where it fits
Regulated SaaS
Multi-tenant portals for firms whose customers run security questionnaires — access logs and evidence generated by design.
Ops Automation
Back-office that runs itself: invoicing, reporting, reconciliation, and follow-ups automated end to end, with monitoring built in.
Migration
Take over an undocumented codebase cleanly — we produce the decision trail, threat model, and runbook so your team owns it, not fears it.
Risk reversal
We take the risk. You keep the asset.
Every commitment below is written into the contract — not implied, not verbal. Risk transfers to us during delivery.
90-Day Defect Warranty
Any defect against the agreed acceptance criteria, found within 90 days of launch, is fixed at no cost.
Critical: 4 business hours · Major: 2 business days · Written into the contract.
100% IP Assigned on Payment
You own everything — code, infrastructure, and the full decision trail — assigned to you on payment.
No lock-in. No hostage code. No dependency on us to keep it running.
Approve Every Phase Before You Pay
The build is decomposed into phases with written acceptance criteria agreed before each begins. You approve each phase before the next starts.
Invoiced per phase · Stop at any phase boundary.
Stage 0 Credited Against the Build
The Discovery & Technical Audit is a fixed fee, credited in full against your build.
Not the right fit? You keep the architecture proposal, threat model, and roadmap.
Questions, answered
Related services
You are not buying code. You are buying certainty.
Stage 0 turns your problem into a fixed-price roadmap — credited in full against the build if you proceed.