Enterprise Microsoft .NET Development & Modernisation

Incremental modernisation of .NET estates without a rewrite. We move systems forward behind a routing facade so that value is delivered continuously and the programme can be stopped at any point without leaving the estate in a worse state than it started.

Request a proposal for this capability Speak with the practice lead

Business outcomes

What you get from the engagement

A supported framework version with a defined upgrade path
Modernisation delivered incrementally rather than as one cutover event
Regression risk contained by characterisation tests written before change
Operating cost reduced through consolidation and right-sizing

Technical capabilities

What we do inside it

.NET Framework to modern .NET migration
Strangler-pattern decomposition of monoliths
Characterisation and regression test construction
ASP.NET Core and Entity Framework Core engineering
Windows to Linux and container migration

Architecture and stack

How we build it

Architectural position

A routing facade fronts old and new implementations so traffic moves per endpoint and reverts instantly if a regression appears.

Representative technologies

Technology selection follows the requirement. This list is representative of engagements in this service line, not a constraint we impose on yours.

Service assurance

SLA, compliance and governance

Engagements in this service line are delivered under the Gold service tier by default, against the compliance obligations below. Both are set in the engagement contract, not by this page.

Default tier

Gold — 99.9% availability target, P1 response within 1 hour, coverage 24 × 5 plus on-call.

Compliance scope

Governance

Written architecture decision records, weekly delivery reporting, and a documented handover comprising runbooks, source and credential transfer at engagement close.

Intellectual property

Client-commissioned work product vests in the client on payment. Source escrow available on request.

Service level tiers, availability targets and response commitments
Tier	Availability target	P1 response	P1 resolution target	Coverage	Service credits
Platinum	99.95%	15 minutes	4 hours	24 × 7 × 365	Yes
Gold	99.9%	1 hour	8 hours	24 × 5 plus on-call	Yes
Silver	99.5%	4 hours	2 business days	09:00–18:00 EAT	No

Publication gate G-05 — outstanding

These values illustrate the structure of the table. Each figure must be confirmed by whoever will be contractually bound by it, and the availability targets must be achievable on the underlying cloud provider SLAs before publication. Publishing a 99.95% target on infrastructure whose own composite SLA is lower creates an obligation that cannot be met.

Also in Frameworks & API

Related service lines

High-Performance Angular Web Applications

Angular applications engineered for the devices and bandwidth of your actual users. We hold a performance budget from the first co...

API Design, Integration, Testing & Security Audit

APIs specified before they are built, contract-tested against their consumers, and audited against the OWASP API risks. We also re...

Request for Proposal

Begin with a scoped conversation, not a sales call.

Our intake is structured so that the first response you receive is technical. Tell us which of the following describes your position and we will route your enquiry to the engineering lead who owns that practice.

Enterprise modernisation An existing system — core, legacy or on-premises — that must be migrated, re-architected or integrated. New product build A platform to be taken from concept or specification to production under a fixed scope. Team augmentation Senior engineering capacity embedded into an existing team and roadmap.

Submit a Request for Proposal Speak with our engagement desk

Enquiries are acknowledged within one business day and answered substantively within two business days. All submissions are treated as confidential; a mutual non-disclosure agreement is available before disclosure of scope.