Say precisely what the system must do
Formal and executable specifications that turn "it should work" into a statement precise enough to test against — the artefact regulators, auditors and integrators can actually hold you to.
High-Assurance Engineering Formal Methods
Formal Methods
& Verification.
Proving software behaves as specified — formal specification, conformance testing and verified toolchains, for the systems where 'probably correct' is not an acceptable answer.
Specify · Verify · Evidence
Correctness you can evidence, not just claim.
Testing shows the presence of behaviour; it cannot show the absence of the wrong behaviour. For the systems where being wrong is expensive, we work from specification to proof to auditable evidence.
Prove behaviour, don’t assume it
Property-based testing, conformance suites and formal verification techniques applied to the parts of the system where a bug is a financial or regulatory event, not a support ticket.
Correctness you can hand to an auditor
Verification that produces artefacts — specifications, conformance results, traceable evidence — so the claim "this software behaves as specified" is demonstrable, not asserted.
How we work
Rigour where it pays, tooling that makes it stick.
Formal methods fail when they're applied everywhere, or when the tooling around them punishes the engineers who use them. We apply them surgically — and build the toolchain that makes the discipline sustainable.
Verification where it pays
Formal methods applied surgically to the critical core — consensus rules, settlement logic, cryptographic components — not spread thin across code that ordinary testing already covers.
Type-driven correctness
Strong static typing and pure, functional-first design used deliberately to eliminate whole categories of defects before a build ever ships.
Conformance as a product
Reference implementations and conformance test suites that let independent implementations prove they follow the specification — the backbone of any serious protocol ecosystem.
Verified toolchains & developer experience
The build tooling, continuous-integration pipelines and developer workflows around verified codebases, engineered at the compiler level and maintained as long-term infrastructure — so rigour makes teams faster, not slower.
The outcome
Software that demonstrably does what it says.
0 Reliance on "probably correct" in the critical core
100% Specification coverage on verified components
↓ Whole defect categories eliminated by construction
Scope of specification and verification — from conformance testing to formal proof — is agreed per engagement.
Let's prove it
Tell us what has to be correct.
Tell us about the component, protocol or system where a defect would be a financial or regulatory event. We'll come back with a plan for specifying it, verifying it, and evidencing the result.
- Formal & executable specification
- Conformance testing & property-based verification
- Verified toolchains & developer experience
Let’s talk
When it has to be right, prove it.
From executable specifications to conformance suites and verified toolchains — correctness you can evidence to a regulator, an auditor or an acquirer.