Service / 03 Integrate
API & Legacy System Modernisation
Expose legacy capabilities through clean, secure APIs so AI and modern apps can use them safely.
/ 01The business problem
Why this matters
Valuable business logic often sits in systems with no usable API: green-screen applications, batch file exchanges and databases shared by a dozen apps. AI agents cannot act safely on systems they cannot call through a controlled interface.
Modernisation does not have to be a big-bang replacement. A well-designed API layer can expose legacy capabilities safely while the core is refactored over time.
Who it is for
- IT leaders with critical legacy platforms
- Architects planning incremental modernisation
- Teams preparing systems for AI agent access
/ 02Scope
What the engagement covers
- 01Legacy system assessment and capability mapping
- 02API design and gateway configuration
- 03Strangler-pattern migration planning
- 04Authentication, authorisation and rate limiting
- 05AI-assisted code understanding and documentation
- 06Testing and cut-over planning
/ 03Technical approach
How we work on it
Wrap before rewrite
We expose stable capabilities through APIs first, which delivers value early and reduces migration risk.
Design APIs for agents too
Narrow, well-described, idempotent endpoints are safer for AI tools and easier for developers.
Use AI to read old code
Models help summarise and map legacy code, always verified by engineers and tests.
/ 04Process
From first call to production
- 1
Consultation
A focused conversation about the problem, constraints and what success would mean.
- 2
Discovery
Evidence gathering: data samples, process walkthroughs and a measured baseline.
- 3
Proposal
Scope, approach, team, timeline, risks and a fixed or estimated price.
- 4
Delivery
Iterative sprints with demos and evaluation results at each milestone.
- 5
Handover or run
Documentation, runbooks and training, or ongoing operation by our team.
/ 05Deliverables
What you receive
- Modernisation assessment and roadmap
- API specifications and gateway setup
- Integration services
- Automated test suites
- Migration runbooks
Engagement options
Fixed-scope sprint
Two to six weeks with a defined deliverable and price, suitable for discovery, assessments and prototypes.
Delivery team
A cross-functional squad for a build or integration, planned in milestones with demos and evaluation results at each one.
/ 06FAQ
Common questions
Can AI rewrite our legacy system automatically?
AI speeds up understanding and translation of code, but automated rewrites still need engineering review and thorough testing. We use it as an accelerator, not a substitute.
How do you avoid disrupting operations?
Changes are incremental, run in parallel where possible and are backed by rollback plans.
Related solutions
Related product concepts
Talk to an engineer about api & legacy system modernisation
Bring the problem and any constraints. You will leave the conversation with an honest view of the options, even if the answer is not us.