ASP.NET Core and C#
Design maintainable web applications, backend services and reusable components with clear responsibilities.
Pact / Expertise · .NET · ASP.NET Core · C#
.NET engineering for business-critical applications.
From ASP.NET Core APIs to data-intensive business applications, we use the .NET ecosystem to solve practical engineering problems. Pact can work on a new service, a feature inside an existing product, or a carefully staged modernisation effort.
What we can help with
From the right architecture to useful day-to-day software.
API and integration development
Connect internal applications, SaaS tools, external systems and databases with documented endpoints and predictable error handling.
SQL Server and Oracle data work
Plan queries, data access, migrations and operational reporting in the context of real application workloads.
Legacy .NET maintenance
Stabilise and improve established ASP.NET and .NET applications while controlling regression and deployment risk.
Working together
Scope, build, review and improve.
We begin by understanding the current code, dependencies, authentication, database boundaries and deployment process. Work can be split into measurable milestones, with testing and review built into the plan.
.NET engineering / implementation notes
Can an older .NET application be improved without a full rewrite?
Yes, in many cases. A staged modernisation can protect working business processes while moving selected features into testable APIs, improving database access, and replacing risky dependencies one at a time. Whether a rewrite is justified depends on actual code, hosting, data and support requirements.
A practical implementation path
- Assess the existing systemIdentify framework and runtime versions, critical endpoints, authentication, batch jobs, integrations, schema dependencies and deployment constraints.
- Stabilise critical pathsAdd regression tests around essential workflows and examine logging, exceptions, concurrency, query performance and backup/rollback behaviour.
- Modernise in slicesExtract or replace a bounded feature using ASP.NET Core, documented APIs and compatible data access patterns rather than changing every module at once.
- Release with rollbackAgree on acceptance tests, release ownership, monitoring, migration steps and a rollback strategy for production changes.
Typical use cases to evaluate
ASP.NET Core REST APIs
Backend services for authentication, business rules, integrations and role-aware data access.
SQL Server and Oracle integrations
Query review, data validation, transaction boundaries and reporting endpoints aligned to existing workflows.
Legacy application improvement
Incremental changes to ASP.NET MVC or .NET services with a focus on testing and compatibility.
These are illustrative service capabilities and design patterns, not claims that a named client project has already been delivered.
Questions people ask
Clear answers, before the first call.
Can AI be integrated into an existing ASP.NET Core application?
Yes. A .NET service can call AI model APIs from a server-side integration layer, validate outputs, and present results inside an existing interface. Use authentication, request limits and human review when AI output could change important data. See our AI integration service for workflow planning.
Can Pact help with an existing ASP.NET MVC or .NET Framework application?
We can assess framework compatibility, dependencies, IIS hosting, SQL queries and deployment constraints, then scope maintenance or gradual modernisation. A full rewrite should be considered only after understanding business-critical logic, migration risk and maintenance costs.
Which database technologies can be used with .NET?
ASP.NET Core can work with SQL Server, Oracle and other supported databases using suitable drivers or data-access libraries. Decisions should account for transaction behaviour, connection management, indexing, concurrency and the existing data model.
Should we build a monolith or microservices?
Start with the size of the team, module boundaries, release frequency and operational complexity. A modular monolith is often practical for a new business application. Separate services can make sense when independent scaling or deployment is justified, but they add monitoring, networking and consistency concerns.
How do you handle authentication and security?
A project should define identity providers, authentication flows, role or policy-based authorisation, secret storage, audit requirements and session behaviour early. We review these needs alongside API validation, transport security, dependency updates and logging hygiene.
Can we hire .NET developers for ongoing work?
For suitable projects, Pact can discuss scoped development or an extended-team arrangement. Before starting, define code ownership, access permissions, review practices, time-zone overlap, milestones and how work will be accepted.
Explore more
Connected disciplines, one clear goal.
Let's build thoughtfully
Bring the problem. We’ll help define the right solution.
Tell us what needs to change, which systems are involved and what success looks like. We can discuss the approach and an appropriate next step.
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