.NET & Custom Development for Scalable, Integrated Business Solutions
We design and build tailored applications, integrations, and extensions using .NET — helping organisations solve complex challenges beyond standard platforms like Dynamics 365.
- Custom business applications
- D365 extensions & integrations
- Scalable backend systems
What we build
We focus on real, working software — not technology lists. Here is what we actually deliver when you work with us.
Custom business applications
Bespoke applications built around your processes when off-the-shelf software falls short.
Backend systems & APIs
Robust, scalable .NET backends and RESTful APIs that power your business logic securely.
Integration services
Connecting disparate systems so your data flows cleanly across platforms without manual effort.
D365 extensions
Custom plugins, workflows, and modules that extend Dynamics 365 beyond its standard capabilities.
Portals & web applications
Customer-facing portals and internal web apps connected directly to your D365 environment.
Custom development for Dynamics 365
This is what separates us from generic development agencies. Our .NET work is deeply rooted in the Microsoft ecosystem you already rely on.
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Extend D365 functionality Build plugins, custom entities, and business rules that sit natively inside your existing D365 environment without breaking standard upgrades.
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Build custom workflows outside D365 Create automated business processes that operate independently but connect seamlessly back into Dynamics 365 data.
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Create APIs for integration Purpose-built APIs that bridge D365 with your other platforms, legacy systems, and external data sources.
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Develop portals connected to D365 Self-service web portals for your customers or staff, powered by live, real-time Dynamics 365 data.
When standard D365 isn't enough
Standard D365 configurations solve most problems — but not all of them. When your organisation has processes that don't fit the platform's defaults, custom .NET development is how you close the gap without compromising your data model or security posture.
We have been doing exactly this for local councils, charities, and public bodies across the UK for years—which means we understand the constraints you are working under.
Discuss your requirements →Technologies we use
Focused, credible, and production-tested. We do not chase trends—we use tools that work in enterprise environments and stand up to scrutiny.
Our development approach
Simple, structured, and transparent. Every engagement follows the same proven delivery methodology—so you always know where you stand.
Discover
Understand your requirements, constraints, and business goals in depth
Design
Define the solution architecture, data model, and integration patterns
Develop
Iterative builds with regular reviews, demos, and honest status updates
Test & validate
Rigorous QA and UAT before anything goes near your live environment
Deploy & support
Smooth go-live with ongoing assistance and knowledge transfer
Integration is in our DNA
Systems rarely operate in isolation. We build everything with integration as a first principle, not an afterthought. This is where Stallions genuinely stands out.
D365 connectivity
Direct integration with all D365 modules—CRM, Finance & Operations, Business Central—via native APIs and the Dataverse SDK.
Third-party system integration
Connect ERPs, finance platforms, HR systems, and legacy databases to your Microsoft environment without ripping and replacing.
API-first architecture
We design every solution to expose clean, documented APIs so future connections are straightforward and maintainable long-term.
Scalable & resilient
Azure-hosted integrations with proper error handling, retry logic, and monitoring—so your operations stay reliable under load.
Common solutions we deliver
The problems below come up time and again across our sectors. If yours sounds similar, we have done it before and we can do it for you.
Custom case management extensions
Extending D365 with specialised case-handling logic for local government and public sector workflows that require complex routing and escalation rules.
Integration APIs between systems
Bridging finance, HR, and operational systems so data moves automatically—eliminating re-keying, reducing errors, and freeing up staff time.
Workflow automation systems
Replacing paper-based or email-driven approval processes with tracked, auditable digital workflows connected to D365.
Data processing services
Batch and real-time data pipelines for reporting, compliance submissions, and operational intelligence dashboards.
Legacy system modernisation
Incrementally migrating ageing applications to .NET and Azure without disrupting the business operations that depend on them.
Self-service portals
Public-facing or staff portals that surface D365 data securely for citizens, students, members, or internal teams.
A truly 360° Microsoft organisation
Our .NET capability sits within a complete Microsoft practice. When you work with Stallions, you work with a partner that covers every layer of the stack.
Delivering across sectors that matter
We have delivered .NET and custom development projects across consulting, implementation, and migration engagements for organisations across the UK that rely on their systems every single day. Our clients include local councils, charities, educational institutions, public bodies, and private sector organisations—each with unique requirements we have met through genuinely tailored solutions.
We understand procurement constraints, data governance obligations, and the operational realities of the sectors we serve. That experience shows in how we scope, deliver, and support our work.
Local Government
Case management, transport, and workforce solutions for councils
NFP & Charities
Membership, fundraising, and CRM solutions for the third sector
Higher Education
Student engagement, compliance, and operational platforms
Public Bodies & Agencies
Regulatory, compliance, and citizen-facing digital services
Not sure how to buy? Here are your options
We offer a range of engagement models to suit your project size, risk appetite, and procurement process. No one-size-fits-all approach.
Fixed-scope project
Defined deliverables, agreed timeline, and certain cost. Ideal when you know exactly what you need and need to go through a formal procurement process with a fixed budget.
Time & materials
Pay for the hours worked as you go. Ideal when requirements are complex, evolving, or not yet fully defined at the outset—giving you the flexibility to adapt as the project develops.
Ongoing retainer
A dedicated block of capacity each month. Ideal for organisations that need continuous development and support without the overhead of hiring and managing permanent technical staff.
Ready to start your project?
Speak to our team today—no obligation, no jargon. Or take advantage of one of our free programmes designed to help UK organisations get moving with Microsoft technology.
A partner built on respect, not just expertise
We are a well-regarded, established Microsoft Partner—UK-focused, multi-sector, and driven by an ethos that goes well beyond simply delivering systems.
UK-focused delivery
Our team understands the regulatory landscape, procurement frameworks, and operational realities of UK public and private sector organisations. We are not an offshore reseller—we are a UK partner.
Relationships over transactions
Our ethos is building long-term partnerships grounded in mutual respect and shared accountability. We do not build systems and disappear—we stay, support, and grow with you.
Ethical operations
We invest in our people, contribute community work, and operate with genuine integrity. Our culture and values are fully transparent—find out more at Life at Stallions.
Stallions Solutions delivers innovative business management solutions as a Microsoft Certified Partner. Our experienced consultants design customised solutions using Dynamics 365, Power Platform, Azure, Machine Learning, and SharePoint to optimise processes and improve bottom lines.
Our Technologies
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