API design & versioning
REST or GraphQL, pagination, error models, deprecation policy, and consumer-friendly OpenAPI.
Service
Web API development
Gefinity designs and builds web APIs your mobile and web teams can ship against in parallel — versioned REST or GraphQL, auth, rate limits, observability, and OpenAPI documentation. We deliver production-minded backends with professional project management, staging environments, and milestone demos. Greenfield platforms or hardening legacy APIs — one accountable squad.
APIs as products
Why API quality determines delivery speed
Slow delivery is often a contract problem: ambiguous payloads, missing idempotency, or auth that only works in Postman. We fix the contract first, then scale implementation.
Service design, databases, migrations, queues, and third-party SaaS are owned with the same rigour as your public endpoints — staging, tests, logging, and tracing before traffic spikes.
Gefinity can run on Azure, AWS, or your cloud with .NET or Node — chosen for your team and compliance needs, not ideology.
Backend scope
What web API development includes
APIs your clients trust — and your ops team can run.
Auth & authorization
OAuth2, API keys, JWT, RBAC, tenant isolation, and audit trails for regulated domains.
Data layer
Relational and document stores, migrations, transactions, and read replicas where needed.
Async & integration
Queues, webhooks, outbox patterns, and resilient third-party connectors with retries.
Observability
Structured logs, metrics, distributed tracing, and SLO dashboards tied to on-call runbooks.
Delivery pipeline
CI/CD, infrastructure as code, blue/green or canary deploys, and load tests before launch.
REST or GraphQL?
Chosen on caching, client diversity, and team skills — often REST with selective GraphQL for aggregate reads.
Can you harden an existing API?
Yes — reviews, auth fixes, versioning strategy, and observability gaps are common engagements with milestone-based remediation.
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.
- Idempotent payment and order APIs with reconciliation hooks
- Webhook delivery with signing, retries, and dead-letter queues
- GraphQL federation for multi-team backends
- gRPC internal edges with REST public gateways
- Rate limiting and bot protection at the edge
- Database zero-downtime migration playbooks
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
REST or GraphQL?
Based on clients, caching, and skills — we recommend in discovery.
Harden existing API?
Yes — auth, versioning, observability, and performance.
Who writes OpenAPI?
Gefinity — kept in sync with CI contract tests.
Cloud choice?
Azure, AWS, or yours — compliance and cost drive the decision.
Project management?
Milestones, weekly updates, demoable endpoints each sprint.
Explore more
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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