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Five ways to work together, depending on where your system stands.

  1. Technical risk assessment

    A bounded review, with an end date, that delivers a risk matrix: what can fail, what it costs the operation when it does, and what should be done about it — with an owner and a deadline on every line. It is the place to start when there are more questions than certainties. Compliance is reviewed as an architectural risk, not as a checklist run just before the audit.

    • Compliance: where the current design exposes you to penalties or transaction blocks.
    • Data integrity: where transactions are lost and where the books stop matching.
    • Availability: what interrupts the operation, how often and for how long.
    • Technical debt and performance: what makes every change expensive, and what degrades as volume grows.

    What you take awayA prioritised risk matrix and a remediation roadmap, with an owner and a deadline on every line.

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  2. Architecture governance

    Establishing how decisions get made: what is decided at each level, who decides it and against which criteria. Every decision keeps its rationale and its date, so whoever arrives later understands why the system is the way it is — and can change it without starting over.

    • One technical vision across every product, instead of one per team.
    • A decision record with its context, the alternative that was set aside, and its date.
    • Written standards: what is expected of a design before it is built.
    • The architecture documents teams need in order to execute.

    What you take awayA decision framework, a decision record and written architecture standards.

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  3. Foundation architecture

    Setting the path for building before the first line of code: what is separated, what is shared and what is left ready to grow. Starting quickly without buying the debt that forces a rebuild of the core two years later.

    • Resilient design: what happens when a component falls, and how the operation carries on.
    • Hybrid architecture for when the legacy system cannot be switched off in one go.
    • The system’s boundaries: what grows on its own and what should never grow at all.
    • Compliance built into the design, not added just before the audit.
    • Local payment rails when the system operates in more than one country: what changes per market and what can be shared.

    What you take awayA target architecture and a phased build plan.

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  4. Spec-to-Code

    Specification-driven development, with the architecture written as code (AaC). The specification stops being a document that falls out of date and becomes the source the build is derived from: what is specified is what gets built.

    • A single source for development, architecture, compliance and security.
    • Architecture as code: versioned, reviewable, and comparable against what was built.
    • Business process diagrams, data flows, architecture specifications, functional and technical definitions, implementation rules, and agreed interfaces for connecting systems.
    • Ready to be implemented by agentic AI and by development teams.

    What you take awayAn executable specification and architecture versioned as code.

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  5. Embedded technical leadership

    The role that decides and answers for it: alongside the teams as they build, resolving the definitions nobody wants to take, and checking that what is built stays faithful to the design. Compliance oversight happens inside the development cycle, not at the end of it. TUN designs and supervises for compliance; certification is issued by a QSA. The engagement is measured by how much judgment stays with your teams: we stay until we are not needed.

    • Guidance and mentoring for development teams on the complex definitions.
    • Continuous performance review as volume and scope keep growing.
    • Oversight of regulatory frameworks and of whichever certification-environment standards apply.
    • Roadmaps and technical material that turn a business decision into an executable route.
    • Building technical teams: structure design, hiring criteria, and the handover that leaves them running on their own.

    What you take awayContinuous design review, and the handover of judgment to your teams.

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