Service

End-to-end system design

Gefinity designs end-to-end systems before you commit to build — domain boundaries, integration contracts, data flows, and non-functional requirements in one decision-ready picture. We deliver architecture artefacts your squads can implement, backed by professional project management, milestone demos, and a named delivery lead. Whether you are greenfield, post-merger, or untangling ownership across teams, we de-risk the next phase with clarity leadership can approve.

Architecture before code

Why system design pays off before the first sprint

Most delivery pain is not missing developers — it is unclear boundaries: who owns which API, which database is authoritative, and what happens when two services disagree on an order state. A focused design phase surfaces those decisions early, when they are cheap to change on paper and expensive to fix in production.

We work cloud-first on Azure or AWS, on-prem, or hybrid — the goal is one coherent model, not a favourite vendor slide. Context maps, C4-style views where they help, event and data models, and an NFR checklist tied to your real constraints give squads a shared language.

Gefinity can facilitate workshops with your leads, produce OpenAPI-first contracts, and sequence a phased roadmap with demoable milestones. You get written outputs and optional embedded support — typically two to six weeks depending on scope, without analysis paralysis.

What we deliver

Design outputs that unblock build

The cards below are typical deliverables from an end-to-end system design engagement. We prioritise what removes the highest integration risk first.

Domain & context mapping

Bounded contexts, ownership, and integration patterns (sync API, events, batch) so squads know where to place new features without stepping on each other.

API & contract design

Versioned REST or event schemas, auth models, idempotency rules, and OpenAPI specs mobile and web can build against in parallel.

Data & event models

Entity lifecycles, source-of-truth decisions, migration paths, and outbox or CDC patterns where eventual consistency is acceptable.

NFR & quality bar

Latency, availability, RPO/RTO, security, observability, and cost envelopes — translated into acceptance criteria for implementation milestones.

Technology shortlist

Stack options (.NET, Node, Elasticsearch, Redis, messaging) scored against team skills, licensing, and operational maturity.

Phased roadmap

Thin vertical slices, milestone definitions, and a risk register so executives see progress and engineering sees a sequenced build plan.

Design-only or design plus a thin vertical slice?

Many clients start with design-only to align vendors and internal squads; others fund a spike that proves the riskiest integration before full programme spend. Gefinity can deliver either — the milestone plan states which path you chose and what “done” means for each phase.

How do you keep design from becoming shelfware?

Every artefact ties to an implementable decision: API paths, error codes, deployment boundaries, or a reference sketch. Review sessions with your tech leads and logged open questions keep professional project management visible in your backlog tool.

What we can build for you

Innovations and capabilities we bring to the table

We are a hands-on engineering studio — not a slide deck factory. Below is the kind of work we routinely design, build, and ship with product-grade quality.

Event-driven and CQRS-style boundaries where read/write scale differently
Multi-tenant and B2B2C identity models with audit-friendly role matrices
Hybrid cloud integration (SaaS, on-prem ERP, marketplace APIs) with retry and dead-letter patterns
Search and cache layers (Elasticsearch, Redis) sized to real query profiles
Zero-trust API gateways, mTLS, and secrets rotation playbooks
Observability baselines: structured logging, tracing, SLOs, and runbooks before go-live

How we deliver

Professional project management — visible progress, no black box

You get a named delivery lead, a shared backlog, and milestones you can demo — not a monthly invoice with vague status. We run discovery, build, and release with the same discipline we use on regulated and high-traffic products.

Discovery & scope

Workshops, written scope, acceptance criteria, and a phased roadmap before heavy build spend. Change requests are logged with impact on time and cost.

Agile delivery

Two-week sprints (or your cadence), demos, retros, and a living backlog in your tool or ours. You see working software early, not only at the end.

Risk & quality

Definition of done, code review, automated tests where they pay off, staging environments, and release checklists — so go-live is a decision, not a surprise.

Transparency

Weekly written updates, burn-down or milestone tracking, and direct access to engineers when decisions need depth — no endless account-manager telephone game.

Handover

Repos, CI/CD, runbooks, and walkthroughs so your team or the next partner can operate and extend without tribal knowledge.

Commercial clarity

Fixed milestones, timeboxed spikes, or dedicated-team models — chosen for your risk appetite, with ballpark ranges agreed before paperwork.

Why teams choose Gefinity

Sales outcomes we optimise for

Faster time-to-market with a thin vertical slice first — revenue or learning earlier
Lower integration risk because one team owns APIs, clients, and ops boundaries
Executive-friendly reporting without hiding engineering trade-offs
Software you can extend in-house after launch — documentation and clean ownership

FAQ

Frequently asked questions

How long does a design phase take?

Typically two to six weeks depending on scope. Milestones are agreed up front with a named delivery lead.

Do you deliver documents only?

Decision-ready artefacts teams can implement, plus optional workshops. Gefinity can also own follow-on build under the same lead.

Can you work with our existing architects?

Yes — we augment internal leadership and accelerate decisions; we do not replace your ownership unless you ask us to lead delivery.

Cloud, on-prem, or hybrid?

All three. The design states deployment boundaries and integration assumptions so ops and security can review early.

What project management do we get?

Shared backlog, weekly written updates, and demoable milestones — the same discipline we use on regulated and high-traffic products.

Explore more

Ready to build with a team that ships?

Share your goals — we will propose milestones, innovations we can deliver, and a ballpark range before paperwork.

Talk to us