ZENKEI
We design and build REST and GraphQL APIs, backends and integrations, secure, documented and scalable, so your products and partners speak the same language, on a stack you own.
Rated 4.9 out of 5 by clients across AI, software and quantitative projects.
API development is building the interfaces that let software talk to software: the REST and GraphQL endpoints, backends and integrations behind your products, apps and partners. ZenkeiX designs the contract, builds it secure and documented, and keeps it fast and stable as usage grows, on a stack you own.
Whether you are exposing an API for partners, powering your own web app or SaaS product, or wiring up third-party services, we build clean APIs with auth, versioning and monitoring, and can add AI capabilities behind them where they fit.
Not glue code. Interfaces your systems trust.
Well-designed endpoints with auth, versioning, pagination and clear docs, so clients integrate in hours, not weeks.
The services behind your product: business logic, data, jobs and queues, built to be reliable and observable in production.
Payments, CRMs, ERPs and SaaS tools connected through their APIs and webhooks, so your stack works as one.
Authentication, rate limiting, logging and monitoring built in, with an architecture that scales as traffic grows.
One session on your data and consumers. We leave with the API contract, endpoints and auth model, agreed before code.
We build the API and backend in your repositories and cloud, with auth, validation, tests and generated docs from the start.
Deployed, monitored and versioned, so integrations keep working as the API evolves and traffic grows.
API development is designing and building the interfaces that let software talk to software, such as REST and GraphQL endpoints, the backends behind them and the integrations to other systems. It covers the API contract, authentication, documentation and the infrastructure that keeps it running.
Both. We choose based on your consumers and data: REST for broad compatibility and simple resources, GraphQL where clients need flexible queries over related data. We can also build and maintain both against the same backend when that fits.
Yes. We connect payments, CRMs, ERPs and other SaaS tools through their APIs and webhooks, handling auth, retries and error cases, so your systems stay in sync instead of drifting apart.
We build in authentication, authorization, rate limiting, input validation and logging, and generate documentation from the API definition so it never goes stale. Access is least-privilege and secrets stay on your side.
Yes. We design for scale from the start with stateless services, caching, queues and monitoring, deployed on infrastructure that can grow horizontally. We load-test the paths that matter before they become a problem.
You do. The code lives in your repositories and the API runs in your own cloud accounts, with no lock-in to us. We set it up, document it, and can hand it over or keep maintaining it as you prefer.
Thirty minutes on your API. No slides, no fluff.