Software architecture & specification
Component decomposition, interface contracts, state and error models, and the non-functional requirements written down before code is cut.
Service 03
Systems & Communications Software Design
Design of software that runs on and around computer systems and communication equipment: device interfaces, control planes and the platforms that manage them.
Overview
Specified before it is written.
Software that talks to equipment has a different failure profile to software that talks to people. It has to be designed for the day the link drops, not the day of the demo.
This is the discipline at the centre of what we do: designing software for computer systems and communication equipment. That spans the interface layer that speaks to a device, the control plane that coordinates a fleet of them, and the management platform that operators actually sit in front of.
We work in design first, covering protocol selection, state machines, failure semantics, data contracts and interface specifications, then move into build, either with our own engineers or embedded alongside yours. The specification is a deliverable in its own right, so the system remains maintainable long after the original team has moved on.
Scope
What's included
Scope is agreed in writing before an engagement starts. These are the components we most often build it from.
Device & equipment interfaces
Integration layers for network, telecom and industrial equipment over SNMP, NETCONF, gRPC, MQTT, Modbus, REST and serial transports.
Control-plane & orchestration design
Provisioning, configuration and lifecycle management across fleets of devices, with idempotent operations and safe rollback.
Telemetry & management platforms
Collection, normalisation and storage of equipment telemetry, with the alerting and dashboards operators need to act on it.
Resilience & failure design
Retry, backoff, partial-failure and reconciliation semantics designed explicitly rather than discovered in production.
Technical documentation
Interface specifications, sequence diagrams, runbooks and architecture decision records that survive team turnover.
Deliverables
What you receive.
Tangible artefacts you own outright, in editable formats, with no dependency on us to read or maintain them.
- Software architecture document and decision records
- Interface control document and API specification
- State machines, sequence and data-flow diagrams
- Reference implementation or working prototype
- Test strategy including failure-injection scenarios
- Operations runbook and handover documentation
Approach
How we run it.
Four stages, with a decision point at the end of each. You can stop after any of them.
01
Requirements
Functional and non-functional requirements captured precisely, including throughput, latency and failure-tolerance targets.
02
Architecture
Components, interfaces and data contracts designed and reviewed, with trade-offs recorded against each decision.
03
Prototype
The riskiest interface built first and tested against real equipment or a faithful simulator, before scope is committed.
04
Build & handover
Implementation to the specification, with tests, documentation and a structured handover to whoever will own it.
What changes
What you should expect to be true afterwards.
If these are not true at handover, the engagement has not finished.
- Interfaces specified before they are implemented
- Failure behaviour that is designed rather than emergent
- Systems that a second team can extend without a rewrite
- Documentation good enough to satisfy an incoming auditor
Questions
Common questions
Both. Some clients need the architecture and specification so their own engineers can build it; others want us to deliver a working system. We are equally comfortable in either mode, and we always leave the specification behind.
Yes. We routinely work against vendor simulators, remote lab access, or a faithful protocol-level mock built from the equipment documentation, and we validate on the real hardware during your test window.
Related
Other service lines
IT Strategy & Consulting
Independent advice on where your technology should go next, plus a costed, sequenced plan for getting there.
Network Design & Consultancy
Network architecture, segmentation and performance engineering: designed on paper, validated in test, documented for the people who run it.
Cloud & Infrastructure Advisory
Cloud adoption planned properly: landing zone design, migration sequencing and a cost model that still holds twelve months in.
Next step
Bring us the symptom. We will help you name the problem.
A short scoping call costs nothing and usually saves a great deal of specification work later.
At a glance
What a first conversation covers
- What is actually happening, in your words
- Which discipline the problem belongs to
- Whether we are the right firm for it
- Rough shape, effort and sequence if we are
Free, no obligation. Reply within one business day.