Engineering & Platforms
API Development
Design and development of well-documented APIs for mobile apps, partners and internal systems, using REST, GraphQL or gRPC, with versioning, authentication, rate limiting and developer portals.
Capability overview
What api development involves
APIs become long-term contracts. Once mobile apps, partners and internal teams depend on an API, careless changes break them, inconsistent naming slows every integration and missing documentation turns simple tasks into support tickets. Good API development treats the interface as a product with consumers whose needs come first.
We design APIs contract-first using OpenAPI or GraphQL schemas reviewed with consumers before implementation, secure them with OAuth 2.0 and scoped tokens, and publish documentation and sandbox access through developer portals. Versioning, deprecation policies, pagination, error formats and rate limits are consistent across every endpoint. Existing APIs can be reviewed against the same standards, with a practical plan to fix inconsistencies without breaking current consumers.
What is included
API development scope
Contract-first design
OpenAPI specifications or GraphQL schemas drafted, reviewed and mocked so consumers can start building in parallel.
Style guidelines
Consistent resource naming, error structures, filtering, pagination and date formats defined for all APIs.
Security
OAuth 2.0 and OpenID Connect, API keys for partners, scopes, object-level authorisation checks and input validation.
Versioning and lifecycle
Version strategy, backward compatibility rules, deprecation notices and usage tracking before retirement.
Developer experience
Interactive documentation, SDK generation, sandbox environments and example requests for partners.
How we work
How we deliver api development
Consumer discovery
Needs of mobile, web, partner and internal consumers gathered to design useful resources.
Specification review
API contracts reviewed with consumers and architecture teams, then mocked for early testing.
Implementation
Endpoints built with contract tests that fail if implementation drifts from the specification.
Security and load testing
Authorisation, abuse cases and performance under expected traffic tested before publication.
Publication
APIs published through a gateway with documentation, keys and monitoring for consumers.
Related capabilities
Related capabilities in Software & Product Engineering
Microservices Architecture
Design and implementation of microservices where independent deployment and scaling are genuinely needed, including service boundaries, event-driven communication, data ownership and the platform required to operate them.
Database Design & Development
Relational and NoSQL database design, query optimisation, stored procedures, migrations and data modelling for applications, so data stays correct, fast to query and ready for reporting as volumes grow.
Systems Integration
Connecting custom-built software to the external systems it depends on, such as payment and GST systems, identity and KYC services, IoT devices, logistics providers and partner platforms, with reliable error handling.
Application Modernization
Engineering work that upgrades existing applications without starting over, such as moving from .NET Framework to modern .NET, AngularJS to React, old Java or PHP versions to supported releases, and monoliths to modular designs.
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Questions & answers
Questions about API Development
Cannot find what you need? Our team responds to technical and commercial questions within one business day.
Ask a questionREST is simpler to cache, secure and document for most business APIs and partners. GraphQL helps when many front ends need flexible data shapes from the same back end. gRPC suits high-performance internal service communication.
By making additive changes where possible, versioning when breaking changes are unavoidable, monitoring which consumers use old versions and giving advance notice before retirement.
Yes. APIs can wrap legacy databases or applications, giving modern consumers a clean interface while the underlying system is modernised gradually.
Defined API sets are quoted as fixed-price projects based on the number of resources, integrations and security requirements.
Next step
Discuss api development with Acmez
Share what you need to change, build, integrate or support. We will map the practical next step.