ERP, B2B/B2C portals, HMRC-compliant accounting integration, industry-specific software. Our 12-year team builds with the latest tech, automates manual work and cuts headcount needs. Fixed price, 12-month warranty, MTD-ready.
Technologies & Integrations We Work With
What We Build
One budget, one team — instead of juggling 12 freelancers. Frontend, backend, mobile, devops, AI — all under our roof in London and Manchester.
Inventory, orders, production, finance, CRM, B2B order portal. Two-way integration with Sage 50/200, Xero, QuickBooks UK, NetSuite and Microsoft Dynamics 365. Role-based access, multi-branch setup, multi-currency accounting.
Amazon UK, eBay UK, Etsy, OnBuy, Notonthehighstreet, ASOS Marketplace, Wayfair UK. Sync product, stock and price from a single panel. Order automation, courier integration (Royal Mail, Evri, DPD UK, Parcelforce, DHL UK, Yodel), returns management.
One codebase, two platforms with React Native. App Store + Google Play publishing included. Push notifications, offline mode, biometric login, in-app payments (Stripe UK, GoCardless, Worldpay, Klarna, PayPal).
Customer-service chatbot, product description generator, invoice OCR reader, smart stock forecasting, customer segmentation. Choose from OpenAI GPT-4, Claude, or our own model. GDPR and UK-GDPR compliant by design.
MTD (Making Tax Digital) VAT submissions, Companies House filings, CIS (Construction Industry Scheme) returns, PAYE/RTI. Sage 50/200, Xero, QuickBooks UK, FreeAgent, NetSuite, Dynamics 365. Automated invoicing, VAT (20%) calculation, year-end reporting.
Logistics (TMS/WMS), healthcare (HIS, NHS integration), education (LMS), construction (project tracking + CIS), restaurants (POS + QR menu), property (CRM + listings), legal (case management). A team fluent in your industry.
Real Results
One portal + one operator replaced 5 people doing manual work. Here are a few examples.
1,200 daily parcels tracked manually in Excel; moved to a QR-barcode mobile + desktop portal with Royal Mail, Evri and DPD UK APIs. Branch-to-HQ sync in real time.
8 stores, 14,000 SKUs, 4 warehouses. Stock drops caused over-sales. Central portal + AI-forecasted stock alerts across Amazon UK, eBay UK and Etsy.
Appointments, patient records, panoramic X-ray viewer, NHS Spine integration, e-prescribing across 6 branches. iOS/Android patient app included. GDPR + DSPT compliant.
Field engineer logs daily timesheets, material requests and photo progress on mobile. Live dashboard at HQ. Automated CIS deductions and monthly HMRC returns.
12-branch restaurant chain. Waitstaff reduced by 40% — customers order via QR, the kitchen screen updates automatically. Stripe + Worldpay integration.
180 trade customers placed orders by phone and email. A B2B portal + two-way Sage 200 integration automated order → invoice → dispatch. MTD VAT included.
How We Work
No months of agile waffling. Fixed price, fixed timeline, weekly demos. No surprise invoices or disappearing PMs.
We discuss your processes (60-90 min). We map current software, problems, goals. Within 3 business days you receive a fixed-price, module-by-module quote and timeline. No commitment.
Wireframes + clickable prototype in Figma. We walk through the screens together and you sign off on the final version. Data model, integration map and API spec are documented.
Frontend + backend + mobile in parallel. Cursor + Claude/GPT-4 delivers 40% faster code. Weekly live demos + screencasts. GitHub access open to you — you can see the code yourself.
Sage/Xero/QuickBooks, HMRC MTD, marketplace APIs, payment gateways, courier APIs — all integrated. We test together in a UAT environment. Bug list closed within 48 hours.
2-3 live training sessions for your team (recorded). Server deployment, SSL, backups, monitoring set up. Soft launch — pilot users live for 1 week. Then full handover.
12 months of free bug-fix warranty. Then an optional maintenance plan (hourly or monthly package). 24/7 monitoring — 99.9% uptime SLA. New feature requests added via monthly sprints.
Local marketplaces, carriers, payment methods and compliance frameworks — from a single panel
A specialty coffee brand in London
"Amazon.co.uk + Etsy entegrasyonuyla 3 ayda £50K MRR'e ulaştı"
Custom Quote
No off-the-shelf price tags. We listen to your needs, scope the modules, and deliver a fixed-price + fixed-timeline quote within 3 business days. The call is free, no commitment.
Whatever the scope, the following are standard — no extra charge.
Bring these and we will produce an accurate quote in 60 minutes.
We work on a fixed price + fixed timeline. The delivery date is in the contract; if we are late, we pay a 3% weekly penalty (capped at 20%). We can do this because we define scope tightly up front, prevent scope creep, and use AI-assisted coding to keep on plan. 23 of our last 24 projects were delivered on time or early (reference list shared on the discovery call).
**The code is 100% yours.** The GitHub repo is handed over at no extra charge. You can continue with any other software firm or hire developers in-house. No IR35-style lock-in. We keep clients with quality, not with contracts.
The opposite. Our senior developer working with Cursor + Claude/GPT-4 ships ~40% faster and with 25% fewer bugs than a solo developer (our own measurements). AI writes code, but architecture, code review and tests are run by our 12-year team. Result: same quality, faster, cheaper.
Yes — we are familiar with HMRC MTD for VAT and the upcoming MTD for ITSA. We integrate directly with HMRC APIs and recognised software vendors like Sage, Xero, QuickBooks UK and FreeAgent. CIS returns, PAYE/RTI submissions and Companies House filings are also supported. Every build is GDPR/UK-GDPR compliant and registered with the ICO when required.
Logistics, e-commerce, healthcare, education, construction, restaurants, property, legal, B2B wholesale, retail, automotive, agriculture — we have live projects across these. If your industry is not on the list, on the discovery call we will introduce you to 1-2 similar clients; hear their story and then decide.
**Marketplaces:** Amazon UK/EU/US, eBay UK, Etsy, OnBuy, Notonthehighstreet, ASOS Marketplace, Wayfair UK, Bol.com, Allegro, Amazon DE/FR/IT/ES. **ERP/Accounting:** Sage 50/200, Xero, QuickBooks UK, FreeAgent, NetSuite, Microsoft Dynamics 365, SAP, Oracle. **HMRC:** MTD VAT, CIS, PAYE/RTI, Companies House. **Payments:** Stripe UK, GoCardless, Worldpay, Sage Pay, Klarna, PayPal, Open Banking. **Couriers:** Royal Mail, Evri (Hermes), DPD UK, Parcelforce, DHL UK, Yodel, UPS. If a system you need is not listed but has a REST/SOAP API, we can integrate it.
No — the code is yours and you run it. During the 12-month free warranty every bug is on us. After 12 months: (1) keep going with your own developer, (2) sign a monthly maintenance plan with us (packages: 8 hours/month £580 — 40 hours/month £2,400), (3) buy hourly support (£95/hr). No contract required.
If you have field staff (drivers, branch managers, site engineers, dentists), mobile is essential — for push notifications, offline mode, camera (QR/barcode/photo). For desktop-only teams a Progressive Web App (PWA) is enough — faster and cheaper. On the discovery call we recommend what fits your scenario; if you do not need mobile, we will say so.
Any SaaS, internal system or marketplace bridge that operates in the United Kingdom eventually converges on four integration surfaces: an accounting platform (Xero, QuickBooks, Sage), HMRC's Making Tax Digital VAT API, the Companies House Public Data API, and Royal Mail's PAF for address validation. This article walks through each, its authentication model, rate limits and the British peculiarities that catch teams off-guard.
SMB accounting in the UK is split roughly between Xero (~35%), QuickBooks Online (~30%) and Sage (~25%). All three expose OAuth 2.0 APIs. Xero allows 60 calls per minute and 5,000 per day per tenant; QuickBooks Online allows 500 per minute (10/s burst); Sage Business Cloud Accounting permits up to 1,000 per minute.
A practical lesson: webhooks across all three platforms are unreliable enough that most production systems still poll on a 5-15 minute cron with a watermark-based delta sync.
HMRC exposes the MTD VAT API as an OAuth 2.0 REST surface at developer.service.hmrc.gov.uk. Developers register a sandbox app, complete production approval, and then must send fraud-prevention headers (Gov-Client-Connection-Method, Gov-Client-Device-ID, Gov-Client-Public-IP, Gov-Client-Screens, Gov-Client-Window-Size, Gov-Vendor-Version, etc.) with every production call — these are mandatory and 400 responses follow if missing.
Core endpoints: VAT obligations, VAT return submission, VAT liabilities, VAT payments. The submission endpoint is not idempotent — duplicate submissions are a frequent and embarrassing production incident. Always persist the HMRC submission identifier in your own database.
The Companies House Public Data API is free, authenticated via API key + HTTP Basic, and rate-limited to 600 requests per 5 minutes. The endpoints you will reach for during onboarding flows are:
/company/{company_number} — company summary/company/{company_number}/officers — directors plus PSC linkage/company/{company_number}/filing-history — confirmation statements and accounts/search/companies — name or number searchFor an "autofill company details on signup" UX, cache the responses for 24 hours. If you need real-time change events, the paid Streaming API (~£600/year) feeds change deltas via long-lived HTTP.
The Postcode Address File is Royal Mail's licensed dataset and the spine of UK address validation. Every e-commerce checkout, application form and CRM in the UK lets the user type postcode + house number and resolves the full address via PAF. You can license PAF directly, but in practice teams use Loqate (formerly PCA Predict), Fetchify, GetAddress.io or Ideal Postcodes. Pricing ranges from £2 to £15 per thousand lookups depending on volume tier.
The UK is effectively the birthplace of Open Banking — the CMA9 mandate plus PSD2 went live in 2018. TrueLayer (London-headquartered), Plaid (with a strong UK office) and Tink (now Visa-owned) are the tier-one providers. Typical use cases: account linking, balance verification, Variable Recurring Payments (VRP) for subscriptions, instant pay-by-bank for high-value checkouts. SCA requires re-consent every 90 days.
Royal Mail Click & Drop offers a REST API for label generation, tracking and service selection. DPD UK exposes the My DPD API; Parcelforce Worldwide offers a SOAP+REST hybrid; Evri uses Carrier Pre-Advice over CSV/SFTP for high-volume shippers; DHL Express provides MyDHL API. Where multi-carrier rate-shopping is needed, Sorted, Metapack and Shippo aggregate these into a single interface.
| Layer | Service | UK Provider |
|---|---|---|
| Hosting | App + DB | AWS eu-west-2 (London) |
| Payments | Card + BNPL | Stripe UK, Klarna |
| Banking | Open Banking | TrueLayer, Plaid |
| Accounting | Ledger | Xero, QuickBooks, Sage |
| Tax | VAT filing | HMRC MTD VAT API |
| Company data | B2B validation | Companies House API |
| Address | PAF lookup | Loqate, Ideal Postcodes |
Post-Brexit UK GDPR means AWS eu-west-2 (London) or Azure UK South are the default residency choices. Personal data transferred to the US or EU must be covered by the UK International Data Transfer Addendum (IDTA) or the UK Addendum to the EU SCCs. Skipping that paperwork is a textbook ICO enforcement target.
Developer demand in the UK is strong, with clear salary bands: Senior Backend roles pay £75-110K in London, £55-85K in Manchester or Edinburgh, £60-95K in Bristol. Hiring channels include Otta, LinkedIn UK, AngelList UK and CWJobs. IR35 reforms since 2021 require the engaging business to determine the employment status of contractors — misclassification creates a substantial PAYE and NI liability. With Tech Nation wound down, Envestors and UKBAA have emerged as the leading Innovator Founder Visa endorsing bodies.
B2B SaaS in the UK is sold in GBP — USD or EUR pricing pages depress conversion by 25-40%. Stripe Billing supports subscription, metered and tiered pricing natively. From a tax perspective, exports of B2B services to overseas customers fall outside UK VAT (zero-rated under the reverse-charge mechanism); UK B2B customers carry 20% VAT and reclaim it via their own VAT return.
Selling to UK enterprise and public sector (NHS, local councils, central government) increasingly requires Cyber Essentials or Cyber Essentials Plus. Self-assessed Cyber Essentials costs £300-£500; the audited Plus tier £1,500-£3,000. ISO 27001 is the next escalation, typically £15,000-£40,000. The NHS Data Security and Protection Toolkit is mandatory for healthcare-adjacent vendors.
London regions (AWS eu-west-2, Azure UK South) are the default for UK GDPR residency. Some public-sector tenders explicitly require "data must remain in UK"; multi-region replication into the EU requires the UK International Data Transfer Addendum. CloudFront or Azure Front Door, with WAF and DDoS protection, are baseline infrastructure components.
B2B e-invoicing is not yet mandatory in the UK, but public-sector suppliers are expected to support Peppol BIS Billing 3.0 — the NHS, for example, uses Peppol. HMRC is consulting on a mandatory e-invoicing rollout for 2026-2028. Building Peppol AS4 access-point integration (Avalara, Pagero, Tickstar) into your software opens up enterprise and public-sector procurement pipelines.
Custom software for the UK is the story of five integrations done well — accounting, MTD VAT, Companies House, PAF, Open Banking. Build them into the MVP rather than retrofitting later: in our experience B2B deals close 30-40% faster when an Xero integration is already live, and HMRC MTD compliance is essentially the price of entry to UK accountancy referrals.