Plexicate
Services

Three things we do well.

We focus on a narrow slice on purpose: AI, APIs, and legacy modernisation, for organisations whose centre of gravity is the IBM stack.

Developer working on code
01 / Greenfield

Greenfield AI implementations

Agentic development that runs where your data lives.

Local models for the data you can't send anywhere. Frontier models for the work where the smartest reasoning pays off. Routed sensibly, behind your firewall, on hardware you already trust — including Power and Linux on Power.

We design agentic workflows that actually deliver code: scaffolding, refactoring, test generation, RPG and COBOL comprehension, modernisation toolchains. The goal is engineering throughput, not demoware.

  • Local + frontier model routing with data-residency rules
  • Agentic development setups for in-house engineering teams
  • RPG, COBOL, Java, and Python codebases — read, explain, refactor
  • Evaluation, guardrails, and observability from day one
02 / API

API implementations

Modern APIs over the systems that actually run your business.

An API strategy that takes IBM i and Power workloads seriously — not as legacy to be hidden, but as systems of record to be exposed safely. Architecture, gateway, governance, and the integration plumbing in between.

We've worked across the IBM integration stack — API Connect, DataPower, MQ — plus REST, SOAP, and the messaging patterns that hold large enterprises together.

  • API architecture and product strategy
  • Gateway and policy design (rate limiting, auth, observability)
  • IBM i / Db2 for i exposure via REST and SOAP
  • Integration with API Connect, DataPower, MQ, and message brokers
03 / Legacy

Legacy systems work

Modernise what's holding you back. Keep what's still earning its keep.

Twenty-year-old RPG isn't bad code — it's the code that's been running the business while everyone argued about microservices. The right answer is almost never a full rewrite.

We help teams make legacy systems observable, testable, and progressively replaceable. You get an honest map of the estate and a sequence of moves that compound, not a year-long rip-and-replace project with a vendor lock-in at the end.

  • Estate assessment and dependency mapping
  • Strangler-fig migrations on your timeline
  • Db2 for i, Oracle, and midrange database modernisation
  • Knowledge capture before the original engineers retire

Not sure which of these fits?

Most engagements start with a short, free conversation. Tell us the situation, we'll tell you what we'd do.

Get in touch →