Enterprise software · UK

Enterprise Software Development in the UK

For mid-market and enterprise teams with a defined programme: a legacy system to modernise, platforms to connect, an internal application that has outgrown its first version. We work alongside your architects, security team and IT, fit your change control, and leave documentation your own engineers can run with.

  • Designed for SSO, role-based access and audit
  • Security questionnaires answered in full
  • Documentation and knowledge transfer in the plan

Who this is for

Enterprise work, sized honestly.

We are a focused engineering team, not a global systems integrator, and we are most useful where there is a defined piece of work: modernising a line-of-business application, building the integration layer between CRM, ERP and your own systems, replacing an internal tool that has outgrown its first version, or adding a customer or partner portal to an existing estate.

We are not the right choice to run a multi-year ERP implementation on our own, and we will say so. Where a larger programme is already under way, we can work as one accountable team inside it, delivering a defined component against your architecture, standards and release calendar.

Day to day, that means working with your people rather than around them: design reviews with your architects, a security review before build, your ticketing and change process, and your environments wherever you prefer them.

  • Mid-market companies modernising core systems
  • Enterprise departments with a defined programme
  • Integration work between platforms you already own
  • IT teams who want the knowledge left behind

What makes it different

Why enterprise delivery needs a different rhythm.

The code is rarely the hardest part. These constraints decide whether an enterprise project lands when planned, so we plan for them from the first week.

What we bring to supplier onboarding

To keep procurement and security review from holding up the start, we provide:

  • Complete, honest answers to security questionnaires
  • Architecture and data-flow diagrams for your review
  • A written description of our secure development practice
  • A named delivery lead and escalation route
  • A contract with a UK company, Krapton IT Consultancy

Systems nobody fully understands

A core application built long ago by people who have moved on, with business rules that exist only in the code and in a few colleagues’ heads.

Platforms you do not control

Dynamics, Salesforce and SAP bring API limits, release cycles and admin teams of their own. Integration plans have to respect all three.

Identity and access at scale

Many roles, a steady flow of joiners, movers and leavers, and auditors who will ask exactly who could see what, and when.

Change control and release windows

Releases go through change boards, agreed windows and rollback plans. Delivery has to fit that rhythm rather than fight it.

Procurement before code

Security questionnaires, due diligence and contract review take real time. Planned for, they run alongside discovery instead of delaying it.

Performance under real load

Month-end runs, bulk imports and many concurrent users expose shortcuts that never show up in testing with a handful of records.

Legacy modernisation

Modernise without a big-bang switch-over.

Replacing a core system in one go is the riskiest way to do it. We move capability across in stages, so the business keeps running and every step can be checked.

Understand it first

Code review, database analysis and interviews with the people who use it. We document what the system really does, including the rules nobody wrote down.

Stabilise before changing

Unsupported runtimes upgraded, monitoring added, and tests wrapped around the riskiest areas before any redesign starts.

Replace it piece by piece

New services take over one capability at a time behind a stable interface, while the old system keeps running everything else.

Migrate data with reconciliation

Repeatable migration scripts, rehearsals on copies of production data, and reconciliation reports your finance or operations teams can check.

Run old and new in parallel

Where the risk justifies it, both systems run side by side until the outputs match and users are confident in the new one.

Retire the old system properly

Data you must keep is archived, access removed, and the licences and servers you no longer need are switched off.

Our migration and upgrade service

Integration and identity

Connected to your platforms, secured by your identity provider.

We integrate through each platform’s supported APIs and plug into the identity provider you already run, so access is granted and removed in one place.

Business platforms

Microsoft Dynamics 365SalesforceSAPBespoke and legacy systems

Identity and SSO

SAML 2.0OpenID ConnectMicrosoft Entra IDSCIM user provisioning

Access and audit

Role-based access controlLeast-privilege service accountsAudit logsAdmin action history

Application stack

C# and .NETJava and Spring BootNode.js and TypeScriptReact and Angular

Data

PostgreSQL and MySQLRedisQueues and eventsReporting replicas

Run and observe

AWSDocker and KubernetesCI/CD pipelinesMonitoring and alerting

Configuration inside Dynamics, Salesforce or SAP stays with your admins or implementation partner. We build what connects to them, respect their API limits and test against your sandboxes, to reduce the chance that a platform upgrade breaks an integration.

Procurement and security

Questionnaires, frameworks and service levels.

Enterprise buying starts long before the first sprint. We complete security questionnaires and supplier onboarding forms in full, and we are plain about what we do and do not hold. If your contract calls for a particular certification or level of insurance, raise it at the start and you will get a straight answer before anyone spends time on a proposal.

Public-sector teams often buy through frameworks such as G-Cloud, and many organisations have preferred-supplier lists of their own. If that is your route, tell us early: we will be clear about whether and how we can be engaged through it, so procurement is not surprised at the last step.

Service levels are agreed per contract rather than copied from a template: response times, support hours, maintenance windows and escalation, matched to how critical the system is. We work UK business hours; if you need cover beyond them, we will discuss what is realistic before anything is written into an SLA.

  • Security questionnaires completed in full
  • Your policies followed on access, devices and data
  • Penetration test findings fixed, ready for your retest
  • SLAs agreed per contract, not from a template

Documentation and handover

Knowledge that stays with your team.

Enterprise systems outlive the teams that build them. Documentation and knowledge transfer are scoped into the plan from the start, not squeezed in at the end.

Architecture decision records

What we chose, what we rejected and why — so future teams can change the system with confidence rather than guesswork.

Runbooks

How to deploy, roll back, restore from backup and respond to the alerts that matter, written for your operations team.

API and data documentation

Every endpoint, integration and data field documented, including the mappings to and from Dynamics, Salesforce or SAP.

Test evidence

Automated test suites your team can run, plus results from performance, security and user acceptance testing.

Pairing and walkthroughs

Your engineers work alongside ours before handover, with recorded walkthroughs of the parts that are hard to learn from the code.

Access and ownership

Repositories, cloud accounts and credentials sit in your organisation from day one, so there is nothing to hand back at the end.

How we work

Enterprise delivery, stage by stage.

Our standard seven stages with the enterprise checkpoints built in: architecture and security review before build, your change process at release, and a proper handover at the end.

  1. 01

    Discovery

    Stakeholder interviews across the business, IT and security; a review of the current architecture, integrations and data; and the non-functional requirements — load, availability, retention and audit.

    Current-state review and requirements

  2. 02

    Strategy

    Options appraised with costs and risks — modernise, replace, buy or integrate — and a phased plan that fits your budget cycle and change calendar.

    Options appraisal and phased plan

  3. 03

    UX & architecture

    Target architecture, identity and access model, integration contracts and the user journeys for each role, reviewed with your architects and security team.

    Architecture and security sign-off

  4. 04

    Development

    Two-week sprints with demos, working in your repositories, ticketing and CI where you prefer. Every change is code-reviewed before it merges.

    Working increments in your environments

  5. 05

    Testing

    Automated tests, performance testing at realistic volumes, accessibility checks, support for your penetration testing, and user acceptance testing with named business users.

    Test evidence for your release board

  6. 06

    Launch

    Releases through your change process, with cutover plans, rehearsed rollback steps and closer support in the weeks after go-live.

    A controlled production release

  7. 07

    Optimisation & support

    Support under an agreed SLA, a roadmap of improvements, or a structured handover to your own team with documentation and pairing.

    SLA support or a completed handover

Engagement models

How enterprise work is contracted.

Enterprise work usually begins with a paid discovery to review the estate and agree a phased plan. Delivery then runs as fixed-scope phases, a managed team that owns an outcome, or dedicated engineers inside your own teams.

Fixed-scope project

Quoted after discovery

A defined build — an MVP, a rebuild or a feature set — with milestones and a fixed budget.

  • Agreed milestones and deliverables
  • Milestone-based billing
  • A demo at the end of every sprint

Managed product team

From £9,500 per month

A small cross-functional pod — engineering, QA and delivery lead — that owns an outcome.

  • One accountable delivery owner
  • Sprint planning and reporting
  • QA and code review included

Dedicated developers

From £2,900 per developer / month

Ongoing roadmap work where you want named engineers inside your own sprints.

  • Named, senior engineers
  • Work inside your tools and sprints
  • Scale up or down as the roadmap changes

Prices are in GBP. Every estimate is confirmed in writing after a discovery call — the figures above are where engagements start, not a quote.

Why Techsleight

What working with us is actually like.

No inflated numbers — just how we run projects, and what you can hold us to.

Product engineering, not ticket-taking

We ask what the software is for before we estimate it — and we will tell you when something should not be built, or should be bought instead.

AI where it earns its place

LLM features, retrieval and automation built with evaluation, guardrails and cost controls, and plain software where that is the better answer.

Full-stack under one roof

Design, frontend, backend, mobile, cloud and QA in one team, so nothing falls between suppliers.

UK-focused delivery

UK business hours, estimates in pounds, and a contract with a UK company. Our engineers are based in the UK and India.

Flexible engagement

A fixed-scope project, dedicated developers or a monthly retainer — and you can move between them as the work changes.

You own everything

Code, IP, cloud accounts and documentation are yours from day one. We sign an NDA before discovery if you need one.

Support after launch

We stay on for fixes, upgrades and new features, or hand over cleanly to your in-house team with the documentation to match.

FAQs

Procurement and delivery questions, answered.

Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.

Ask us a question

Do you work with large enterprises or mainly mid-market companies?

We are a good fit for mid-market companies modernising or building whole systems, and for larger organisations with a defined component, integration or department-level application inside a wider programme. If a piece of work needs a much bigger supplier than us, we will say so at the start.

Can you integrate with Microsoft Dynamics 365, Salesforce or SAP?

Yes, through their supported APIs. We agree integration contracts and data mappings with your platform admins, design around API limits and release cycles, test against your sandboxes and document every mapping. Configuration inside the platform stays with your admins or implementation partner.

Do you support single sign-on with Microsoft Entra ID?

Yes. We integrate with Entra ID and other identity providers over SAML 2.0 or OpenID Connect, map application roles from your groups, and can add SCIM provisioning so joiners, movers and leavers are handled in your directory rather than inside our application.

Will you complete our security questionnaire and supplier onboarding?

Yes, in full. We answer honestly — including where we do not hold a particular certification — and provide architecture and data-flow diagrams, a description of our development practice and named contacts. If a requirement is a hard gate for your contract, raise it early so nobody wastes time.

Can we buy from you through G-Cloud or another framework?

Tell us your procurement route at the start. Public-sector buyers often use frameworks such as G-Cloud, and some contracts can be awarded outside a framework, depending on value and your procurement rules. We will be straight about whether we can be engaged through the route you need, and what the alternatives are.

How do you modernise a legacy system without disrupting the business?

In stages. We document what the system does, stabilise it, then move one capability at a time behind a stable interface while the old system runs the rest. Data migration is rehearsed on copies of production data with reconciliation reports, and old and new run in parallel where the risk justifies it.

Can you support the system under an SLA after go-live?

Yes, on terms agreed in your contract rather than copied from a template. Response targets, support hours, maintenance windows and escalation routes are set by how critical the system is. Our standard hours are UK business hours; wider cover is discussed openly before it is promised.

Can you work within our security controls and tooling?

Yes, and we recommend it. Working in your repositories, CI, ticketing and cloud accounts from day one keeps your security controls in place, gives your team full visibility and means there is nothing to transfer at the end. We follow your policies for accounts, devices and access.

Where are your engineers, and can production access be limited to the UK?

Our engineers are based in the UK and India and work UK business hours; contracts are with Krapton IT Consultancy, a UK company. If your data or contract requires that only people in the UK access production systems, tell us at the start and we will confirm how the team would be staffed before anything is signed.

How do you make sure the system performs at scale?

By defining the load up front — users, transactions, data volumes and peaks such as month-end — and testing against it with realistic data before release. Profiling, indexing, caching, queues for heavy work and capacity planning then follow from measured results rather than guesswork.

Start a project

Planning an enterprise software programme?

Tell us about the system, the platforms it touches and where procurement is up to. We will reply with questions, an honest view on fit and what a discovery phase would cover.

  1. 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
  2. 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
  3. 3A written proposal with scope, milestones, team and a GBP estimate you can take to your board.

Techsleight Labs is a trading name of Krapton IT Consultancy.

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