Software Engineering
Design and delivery of maintainable applications, APIs, integrations and data-driven systems, with a strong .NET bias and a pragmatic full-stack approach.
PatternSoft Ltd · UK software consultancy
Software engineering for systems that have to work.
We help organisations understand difficult software, modernise legacy systems and turn messy requirements into dependable solutions — from hands-on development to technical leadership and AI-enabled delivery.
About
Experience where software meets the real world.
PatternSoft Ltd delivers software engineering and technical leadership for organisations that need experienced, pragmatic technical help. Our experience spans decades of commercial systems work, including financial services, data-heavy applications, integration, legacy modernisation and business-critical tooling.
We are at our best where the problem is not neatly packaged: an inherited system nobody fully understands, a process held together by spreadsheets and tribal knowledge, or a new capability that needs enough architecture to survive without disappearing into ceremony.
What we do
From first diagnosis to working software.
Useful engineering rather than theatre: understand the system, identify the leverage points, then build what matters.
Legacy & Modernisation
Reverse-engineering existing systems, making undocumented behaviour explicit, reducing risk and creating sensible routes from old technology to new.
Technical Leadership
Architecture, technical direction, delivery troubleshooting and the translation layer between business intent and engineering reality.
AI-Enabled Delivery
Practical use of LLMs, agents, APIs and automation to accelerate delivery and create useful new workflows — without treating AI as a solution in search of a problem.
Expertise in practice
Specific experience, not generic capability claims.
Fintech & banking
Experience spans asset management, banking, SWIFT payments, portfolio systems, trading and treasury support, KYC and regulatory applications, and client-facing financial platforms.
Other verticals
Commercial delivery experience also includes insurance, payroll and HR systems, retail and EPOS, FMCG, travel and hospitality, supply chain, government, media, and large-scale loyalty and marketing platforms.
Legacy Microsoft modernisation
PatternSoft specialises in understanding and evolving established Microsoft-stack applications: from ASP.NET, Web Forms, MVC and older .NET codebases to API-driven services and modern .NET architectures. Experience with AS400/iSeries integration remains useful where Microsoft systems sit alongside older mid-range platforms.
Applied AI
PatternSoft applies LLMs, agents, MCP, retrieval and workflow automation to real engineering problems: connecting tools, exposing APIs, accelerating delivery and building practical AI-assisted processes.
Selected experience
Commercial systems across demanding environments.
Asset management
Portfolio model-management tooling, partner-facing applications, KYC/regulatory systems and ongoing support of a production client portal.
Insurance
B2B and B2C applications and services for specialist and boutique insurance operations, including systems supporting niche products and business processes.
Fintech
Greenfield delivery helping legacy customers transition to digital services through modern APIs and integrated front-end applications.
Banking & payments
Intra-bank payments, SWIFT messaging, treasury and trading support, regulatory reporting, and large-scale transition work.
Capabilities
A broad toolkit, anchored in systems thinking.
Core engineering
Architecture & delivery
AI & automation
Domain & leadership
Get in touch
Have a difficult system or a useful idea?
We’re open to contract opportunities, consultancy and selected freelance projects across the UK.