Enterprise API Architecture & Systems Integration in United Kingdom
Connect disparate corporate software systems, mobile applications, and partner portals securely. Mr Umer Malik delivers custom, documented RESTful and GraphQL APIs engineered to UK enterprise standards—contracted strictly outside IR35 under English Law.
Core Capabilities & Production Deliverables
Direct architectural execution by senior engineer Mr Umer Malik with zero agency dilution.
Open Banking & Payment Gateway Bridges
Compliant API bridges linking commercial platforms with TrueLayer, BACS Faster Payments, and UK financial software.
Corporate ERP & CRM Microservices
Custom integration pipelines synchronizing client records, inventory, and invoices across Xero, Sage, and custom SQL databases.
UK GDPR & Cyber Essentials Hardening
End-to-end TLS encryption, audit logging, and IP allowlisting protecting sensitive British corporate data.
AWS London (eu-west-2) API Deployment
Low-latency API gateways hosted within the United Kingdom, ensuring compliance with British data protection regulations.
Comprehensive OpenAPI & Developer Docs
Clear, standardized API specifications allowing your internal technical teams to connect systems with ease.
Outside-IR35 Commercial Terms
Fixed milestone delivery in GBP (£) with guaranteed turnaround times and full IP assignment under English Law.
Why British Businesses Choose Umer for APIs
Direct senior developer collaboration with zero agency bureaucracy, tailored for UK enterprise standards.
UK Business Hours Collaboration
Direct Slack, Teams, and phone access with senior engineer Mr Umer Malik throughout UK working hours.
100% Outside-IR35 Compliance
Fixed milestone delivery in GBP (£) with guaranteed delivery dates and full IP assignment under English Law.
AWS London Data Residency
Hosting on AWS London (eu-west-2) to satisfy the UK Data Protection Act 2018.
Direct Senior Developer Access
Work directly with the architect building your API with zero agency account managers.
Phased Delivery Roadmap & How This Project Runs
Structured from initial discovery call to production deployment and 100% intellectual property transfer.
Phase 01: API Specification & Requirements
Mapping data contracts, authentication protocols, and fixed pricing milestones in GBP (£).
Phase 02: Endpoint Development & UK Staging
Writing clean, test-driven endpoints deployed to an isolated staging environment on AWS London.
Phase 03: Accounting & System Integrations
Connecting Xero, CRMs, and payment gateways with comprehensive error handling.
Phase 04: Production Release & Code Handover
Production deployment, interactive documentation walkthrough, full IP transfer, and 30-day warranty.
Commercial FAQs for British Businesses
Clear answers on UK business hours alignment, fixed stage pricing in GBP (£), and outside-IR35 contracting.
Can you connect our custom software to Xero or QuickBooks? ▼
Where are API servers hosted to comply with UK data laws? ▼
How do you prevent unauthorized access to sensitive endpoints? ▼
Can our in-house developers maintain the API after launch? ▼
What commercial terms are available for UK companies? ▼
What warranty is included after project completion? ▼
Great dreams deserve craftsmanship, not compromises. Let’s build yours.
© 2026 UMER XPERT. SERVING THE UNITED KINGDOM — LONDON TO EDINBURGH. All rights reserved. Contracts compliant with English Law & outside IR35.