code73Ltd

Independent UK software consultancy · Est. 2013

We engineer the platforms regulated business runs on.

Code 73 Ltd delivers principal-level architecture, fintech & payments engineering and cloud modernisation on the Microsoft stack — with AI-enabled delivery that ships faster without cutting corners.

Start a conversation What we do
Code 73 logo
Trusted by
13
years consulting as Code 73 Ltd
20+
years engineering on the Microsoft stack
9
enterprise engagements, fintech to insurance
170k
customers on a banking platform we stabilised
Services

Principal-level consultancy, end to end

From solution shaping to production support — the disciplines regulated platforms demand, delivered hands-on.

01

Solution & Technical Architecture

Clear, actionable designs for statements of work, new implementations and internal initiatives — translating complex business and regulatory requirements into architecture teams can deliver against.

02

Fintech & Payments Engineering

SEPA Instant Credit Transfer with full ledgering and reconciliation, closed-loop payment platforms, banking fee engines and EPC rulebook compliance — in PCI DSS and ISO 27001 environments.

03

Cloud Modernisation

Zero-downtime cloud migrations, AKS and containerised microservices, multi-tenanted platforms that are observable, resilient and cost-efficient. Infrastructure as code with Bicep and Azure DevOps.

04

AI-Enabled Engineering

AI-assisted analysis, design and development workflows that compress delivery timelines — governed by plan-first agentic practice, review gates and engineering discipline.

05

Delivery & Technical Leadership

Tech lead and acting Head of Engineering roles: stabilising teams, embedding Agile cadence, mentoring developers and giving director-level stakeholders straight answers.

06

Quality Engineering

Test-first delivery with TDD and BDD, automated integration testing and CI/CD pipelines — quality built into the process, not inspected in afterwards.

AI-Enabled Delivery

AI acceleration, engineering discipline

We use AI-assisted development and intelligent design tooling across analysis, architecture and build — to increase clarity, reduce delivery risk and accelerate decision-making. Not automation for automation's sake: intelligent orchestration with a human architect accountable for every design.

✓
AI-assisted architecture & analysis — solution designs and technical specifications produced faster, reviewed properly.
✓
Plan-first agentic development — break the work down, let the AI ask questions, iterate and review.
✓
AI-accelerated modernisation — legacy platforms mapped, understood and migrated in a fraction of the usual time.
✓
Governance built in — TDD/BDD gates, code review and compliance checks on everything AI touches.
Track Record

Thirteen years of delivery

Long engagements, repeat business and platforms still in production — across banking, insurance, construction and energy.

2021 — present5+ years · fintech

OmnioBanking & Payments

Principal engineering and architecture across a regulated fintech ecosystem — from hands-on delivery to the Architecture function, including acting Head of Engineering.

  • End-to-end SEPA Instant Credit Transfer: ledgering, reconciliation, idempotency and EPC rulebook compliance.
  • Zero-downtime migration of a major banking client from AWS to Azure.
  • Stabilised a 170,000-customer SaaS banking platform; cut Azure cost and lifted observability.
  • Co-architected a next-generation closed-loop payments platform using AI-assisted development.
2019 — 20213 engagements

Dezrez · Cloudbooking · IR35 ShieldSaaS

Microservice re-architectures, cross-business integration on .NET Core, and reporting-suite delivery — clean domain-driven design with TDD/BDD throughout.

201911 months · insurance

AIGInsurance

Digital transformation programme for the global insurer — .NET Core Web APIs for a new microservices architecture, OAuth, message-driven integration and React access management.

2014 — 20194+ years · insurance

AvivaInsurance

Senior consultancy to the digital platform teams over four years — technical point of contact for the platform's AWS cloud move, a new strategic product built with a 30-developer team, real-time payment gateway design, and a BDD framework adopted across the digital estate.

2013 — 20142 engagements

Kier GroupConstruction

Principal technical architect on the IT strategy roadmap through the Kier / May Gurney merger — enterprise web solutions, mobile vendor assessment and heavy SQL optimisation across 10-million-record systems.

20135 months · energy

Haven Power — now DraxEnergy

Solution architecture on a greenfield pricing platform replacing a legacy Excel process — technical design, database schematics and delivery to strict SOLID principles.

About

The consultant behind Code 73

Danny Woolston

Founder & Principal Consultant

Code 73 Ltd is led by Danny Woolston — a senior .NET consultant and technical architect with over 20 years across the Microsoft ecosystem, and a background spanning fintech, embedded finance, loyalty systems and high-volume transactional environments where reliability, performance and regulatory precision are non-negotiable. Every engagement gets principal-level attention; nothing is handed down the bench. LinkedIn profile →

Contact

Let's talk about your platform.

Available for contract engagements — architecture, payments engineering, cloud modernisation and AI-enabled delivery. UK-based, working remotely.

Emaildannywoolston@code73.co.uk LinkedInDanny Woolston