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DEVCRAFT SERVICE

Backend & API Development

Scalable APIs and microservices built to last

We engineer high-performance backends — REST APIs, GraphQL, microservices, real-time systems, and event-driven architectures — that power your product reliably at any scale.

50ms
P99 API Latency
1M+
Requests/min Handled
99.9%
API Uptime
100%
Test Coverage Target
WHAT WE OFFER

Full Backend & API Development Capabilities

Everything you need, delivered end-to-end by our specialist team.

RESTful API Design

OpenAPI-documented, versioned REST APIs following best practices for consistency, pagination, and error handling.

GraphQL APIs

Type-safe GraphQL schemas with DataLoader batching, subscriptions, and schema federation.

Microservices Architecture

Domain-driven service decomposition with well-defined contracts, service discovery, and circuit breakers.

Real-Time Systems

WebSocket servers, Server-Sent Events, and pub/sub systems for live data features.

Event-Driven Architecture

Kafka, RabbitMQ, and AWS SQS/SNS pipelines for reliable async processing and decoupling.

Authentication & Authorisation

OAuth 2.0, JWT, RBAC, ABAC, SSO (SAML/OIDC), and multi-factor authentication.

API Gateway & Rate Limiting

Kong, AWS API Gateway, or custom middleware with throttling, caching, and analytics.

Database Design & Optimisation

Schema design, query optimisation, indexing strategy, and connection pooling.

TECHNOLOGY

Our Tech Stack

Runtime
Node.jsGoPythonJavaRust
Frameworks
NestJSFastifyGinFastAPISpring Boot
Database
PostgreSQLMongoDBRedisClickHouseCassandra
Messaging
Apache KafkaRabbitMQAWS SQSNATS
API
RESTGraphQLgRPCWebSocketstRPC
HOW WE WORK

Our Delivery Process

01

Design

API contract design (OpenAPI/GraphQL schema), entity modelling, data flow diagrams.

02

Architecture

Service boundaries, database selection, caching strategy, and scaling plan.

03

Development

TDD-driven development, PR reviews, and API documentation auto-generated from code.

04

Testing

Unit tests, integration tests, load tests (k6/Locust), and contract tests.

05

Deployment

Blue-green or canary deployment. API versioning and deprecation strategy.

06

Monitoring

APM tracing, error alerting, slow query detection, and capacity planning.

WHY DEVCRAFT

What Sets Our Work Apart

  • OpenAPI documentation auto-generated
  • Comprehensive test suite included
  • Horizontal scaling built in
  • Structured logging and tracing
  • Security audited before delivery
  • SDK generation for client teams
NDA Protected
On-Time Delivery
5-Star Support
CASE STUDY

FinFlow Trading API

FinTech
Challenge

A trading platform needed a sub-100ms order execution API handling 50,000 concurrent users with full audit trails and strict consistency guarantees.

Our Solution

Built with Go for performance-critical paths, PostgreSQL with optimistic locking, Redis for session/cache, and Kafka for event streaming. Full OpenAPI documentation.

Results
  • P99 latency under 45ms
  • 1.2M requests/min at peak
  • Zero data loss incidents
  • Full audit trail for regulatory compliance
FAQ

Common Questions

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Ready to build your Backend & API Development solution?

Let's talk about your project. We'll get back to you within 24 hours with a tailored approach and realistic timeline.