API Development Services

API development services for REST, GraphQL and integrations. Design backend contracts, security, data integrity and operating controls around your existing systems.

A backend that is hard to reason about creates bugs that are hard to find and integrations that are hard to build.

The API design you ship today is the constraint your clients and frontend teams live with for years.

APIs designed around database tables, not domain concepts

Every change to the data model requires coordinating with every client. The API leaks implementation details, so the database structure dictates the contract rather than the business domain.

No versioning strategy, so breaking changes break integrations

Partners and internal teams scramble when a field disappears or changes shape. Without explicit versioning from the start, every API update is a coordination problem waiting to happen.

Authentication bolted on inconsistently and error handling that lies

Security added as an afterthought creates gaps. Returning 200 with an error payload in the body means clients cannot reliably act on what the API tells them.

Background jobs that fail silently and cannot be retried safely

No dead letter queues, no idempotency guarantees, no visibility into what happened. The job ran, or it did not, and there is no way to know without going into the database to check.

We design APIs around the domain, not the implementation.

Authentication and authorization are built into the design from the start, and async systems are built with failure in mind from day one.

Domain-driven API design with clear resource boundaries

Resources reflect business concepts, not tables. Consistent contracts, explicit versioning from the start, and authentication built into the design before a line of business logic is written.

Async systems built for failure: idempotency, retries, dead letter queues

Every background job, event handler, and integration has a defined failure mode. Operations that get retried are idempotent. Failed processes are visible, not silent.

Observability into every async process

Structured logging, metrics on queue depth and processing latency, and alerting on failure thresholds. The system tells you what happened before you have to go looking.

Domain-driven. Versioned from day one. Written to be read by the next engineer.

A backend that integrates cleanly, fails gracefully, and that your team can extend without fear.

API contracts that do not break clients. Background systems that are visible when they fail and safe to retry when they do.

API with explicit versioning and consistent contracts

Resources modeled on domain concepts, not database tables. Clients can depend on the contract without coordinating every change.

Async systems with dead letter queues and retry logic

Failed jobs go somewhere observable, not nowhere. Idempotency means retrying is safe rather than risky.

Authentication and authorization built into the architecture

Security is not added at the end. Credential management, access controls, and secret rotation are part of the initial design.

Code written to be read by the next engineer

Clear naming, documented decisions, and patterns that do not require the original author to be in the room to understand.

Results

Contracted

Versioned API behavior, ownership, compatibility rules, and deprecation policy are explicit.

Recoverable

Retries, idempotency, dead-letter handling, reconciliation, and rollback are designed together.

Observable

Service health, queue state, dependency failures, and release changes can be traced to an owner.

Acceptance evidence

The engagement defines contract tests, failure cases, security boundaries, performance conditions, and operational handoff evidence before the system is accepted.

Related services

Frontend & UX Engineering

When the backend contract is stable, this engagement builds the interface on top of it with the same engineering discipline.

Product Development

When backend systems are part of a broader product build rather than a standalone API or service layer engagement.

Build integration contracts that survive failure

API development services and event-driven architecture consulting share a core concern: another system must be able to depend on the contract when releases, retries, or outages occur.

Event-driven architecture consulting

Identify the authoritative producer, the event meaning, and each consumer's responsibility. Commit a business change and its publishing intent together where required. Define deduplication, retries, dead-letter ownership, replay limits, and reconciliation. Agree which transitions need immediate consistency and which can tolerate a visible processing delay.

Evaluate asynchronous delivery trade-offs

REST, GraphQL, and AWS API development

Choose the interface from consumer needs, authorization boundaries, query patterns, and compatibility requirements. An AWS API Gateway can enforce gateway policy while application services still own domain authorization and data integrity. Version contracts and errors, test rate limits and timeouts, and make pagination and deprecation behavior explicit.

Review API gateway policy and failure contracts

Frequently asked questions

What do API development services include?

API design, implementation, documentation, authentication, versioning, testing, monitoring and integration with other systems.

Should we use REST or GraphQL?

REST is simple and widely supported; GraphQL suits clients that need flexible data queries. The choice depends on consumers and use cases.

How do you secure APIs?

With strong authentication and authorisation, input validation, rate limiting, encryption, logging and regular security testing.

Can you build integrations with third-party systems?

Yes. We integrate payment, CRM, ERP, logistics and other platforms with reliable retries, idempotency and monitoring.

How do you keep backend systems scalable?

Through clear service boundaries, efficient data access, caching, asynchronous processing and load testing.