# Nexora | Go Backend & API Development > Build Go backend services and APIs with Nexora. Define service contracts, manage concurrent work and measure the behaviour of your application. Canonical page: https://www.nexoraesrd.com/technologies/go-api-and-service-development/ Language: English Nexora ESRD LLP · Application Development Technologies & Platforms # Go Backend & API Development A small service should have a clear responsibility and a measurable workload. We use that starting point to plan Go applications, with attention to the requests, background work and operating limits they need to handle. [Discuss your project ↗](https://www.nexoraesrd.com/contact/?service=software) ## Define Go service and API contracts We define request formats, access checks and response behaviour before implementation. Errors should tell a caller whether to correct the request, retry later or stop. Interfaces with external systems include time limits and explicit assumptions, so one slow dependency does not leave every request waiting indefinitely. ## Control concurrent work Handling several tasks at once also creates coordination and resource questions. We plan cancellation, queues and limits around the expected workload. Shutdown behaviour matters too: the service should have a defined way to finish or release work when a deployment or interruption occurs. ## Measure what the service actually does Tests cover the useful operation and its failure paths. Where performance matters, representative requests provide a basis for decisions rather than assumptions about the language. Logs, health checks and deployment instructions give the operating team enough information to distinguish a capacity issue from an application defect. ## Project deliverables - Service and API contract - Go implementation with resource controls - Workload and interruption checks - Deployment and diagnostic guide ## Service questions and answers ### When is Go worth considering for a new service? Consider the responsibility of the service and the skills of the team that will maintain it. Go may suit a focused API or background service, but the language alone does not establish performance or simplicity. We compare a representative workload and deployment needs before deciding whether it improves the overall system. Explore related services [Define the service contract first](https://www.nexoraesrd.com/services/api-and-system-integration/) ### How do you keep concurrent tasks from exhausting the service? We plan limits for work in progress, queues and external calls instead of starting unlimited tasks. Cancellation and timeouts help release resources when a caller leaves or a dependency stalls. Tests should include overload and shutdown, with a clear rule for work that cannot be completed immediately. Explore related services [Check workload and failure behaviour](https://www.nexoraesrd.com/services/software-quality-and-testing/) ### What should an API caller see when another system is unavailable? The response should distinguish an invalid request from a temporary dependency failure. We agree time limits and whether a retry is safe for that operation. For longer work, a recorded job status may be more useful than leaving the request open, particularly where the external system can accept work before its response is lost. Explore related services [Compare backend job handling](https://www.nexoraesrd.com/technologies/nodejs-backend-integration/) ### What operating information belongs in the handover for a Go service? Your team needs build and deployment instructions, configuration requirements and meaningful health checks. Logs should help explain failed requests without collecting unnecessary private information. Where capacity matters, the record should describe the workload used in testing and its limits, so later changes can be compared with something concrete. Explore related services [Plan the service operating environment](https://www.nexoraesrd.com/technologies/cloud-application-platforms/) ## Discuss your project Tell us what you want to build. We'll help you find a clear way forward. [Discuss your project ↗](https://www.nexoraesrd.com/contact/?service=software) Explore the wider service [Software & Web Development ↗](https://www.nexoraesrd.com/services/software-web-development/) [Discuss your project ↗](https://www.nexoraesrd.com/contact/?service=software) ## Related services ### API Development & System Integration Nexora develops APIs and system integrations with defined data contracts, access controls, retry handling and documentation for connected applications. [Explore this service](https://www.nexoraesrd.com/services/api-and-system-integration/) ### Software Testing & Quality Assurance Nexora tests software using risk-based scenarios, realistic data and clear defect reports, helping your team assess the evidence for a release. [Explore this service](https://www.nexoraesrd.com/services/software-quality-and-testing/) ### Node.js API & Backend Development Nexora builds Node.js backends and APIs with clear request handling, background tasks and dependency controls suited to your application. [Explore this service](https://www.nexoraesrd.com/technologies/nodejs-backend-integration/) ### Cloud Application Engineering Services Develop cloud applications with Nexora, from workload planning and access controls to release workflows, monitoring and recovery procedures. [Explore this service](https://www.nexoraesrd.com/technologies/cloud-application-platforms/)