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API & Backend Solutions

API-first architecture with versioned, documented, and well-tested REST and GraphQL APIs.

−40% p95 latency cut on a concurrent ledger API rebuild

Versioned REST/GraphQL APIs with auth, rate limits, and observability — the spine every web, mobile, and partner integration depends on.

Who this is for

Teams whose product is collapsing under ad-hoc endpoints, or who need a clean API layer before mobile and partners pile on.

The problem clients bring us

Endpoints grew organically. No versioning, weak auth, no rate limits. Under concurrency the database saturates and every client feels the pain.

How Xaironix approaches it

API-first contracts, token auth, Redis rate limiting, and clear ownership of write vs read paths. Laravel or Node.js (Express/Nest) with Postgres and queues for heavy work.

Outcome you can expect

Clients stop inventing workarounds. Latency stays predictable under load — and your next consumer (mobile, partner, AI) plugs in without a rewrite.

What we ship

OpenAPI / documented REST or GraphQL surface
Secure tokens, scopes, and refresh flows
Rate limiting, idempotency keys, and retry-safe writes
Structured logging and error budgets on critical routes
Integration guides for web, mobile, and third parties

Why teams trust Xaironix on this work

NDA before API schemas or secrets are shared
Backend engineers available on Slack/Jira
Source, Postman/OpenAPI, and runbooks handed over
90-day post-launch API support

Tech stack

Laravel Node.js Express NestJS Redis PostgreSQL

Ready to scope this?

Talk to a senior engineer — NDA-ready, no account managers.

Start Your Project Or message us first

Proof of work

Related case studies

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−40%

p95 database latency under heavy concurrency

Fintech SaaS MVP — Concurrent Ledger APIs

Node.js microservices and API rate limiting cut p95 database latency by 40% under heavy concurrency — without a risky full rewrite.

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Event-driven Laravel pipelines cut dispatcher status lag from minutes to under 3 seconds at peak concurrency.