Integration Engineering

API & Integration Development

Connect your systems. Unlock your data.

RESTful and GraphQL APIs, third-party integrations, and event-driven architectures that make your systems work together seamlessly.

API-First
Design philosophy
Event-Driven
Real-time architectures
Federal Experience
Complex integrations
Well-Documented
OpenAPI/Swagger

APIs That Connect Your Business

Modern businesses run on interconnected systems — CRMs, ERPs, billing platforms, marketing tools, and custom applications that each hold a piece of your operational data. When these systems can't talk to each other, your team fills the gap manually: exporting CSVs, re-keying data between platforms, and building fragile spreadsheet workflows that break when someone changes a column name. The cost isn't just labor — it's delayed decisions, inconsistent data, and opportunities lost while information sits trapped in silos.

Well-designed APIs unlock your data and enable the automation that transforms how your organization operates. A customer record updated in your CRM automatically triggers provisioning in your platform. An invoice generated in your billing system flows into your accounting software without human intervention. Partner systems query your API for real-time inventory or pricing instead of waiting for overnight batch files. The question isn't whether to build APIs — it's how to build them so they're reliable, secure, and maintainable over years of evolution.

Choosing between REST and GraphQL, designing versioning strategies that don't break existing clients, and building documentation that developers actually want to read — these decisions shape whether your APIs become a competitive advantage or a maintenance burden. REST offers simplicity and broad tooling support for well-defined resources. GraphQL provides flexible querying for complex, relationship-heavy data models. Versioning strategies range from URL-based versions to header negotiation, each with distinct trade-offs for backward compatibility. And comprehensive API documentation — powered by OpenAPI specifications and interactive examples — is the difference between partners integrating in days versus months.

The Difference

Without Integration Engineering

  • Disconnected systems requiring manual data transfer
  • Fragile point-to-point integrations breaking constantly
  • No API documentation for developers
  • Batch jobs running overnight causing delays
  • No real-time updates when data changes
  • Can't integrate with partners or customers

With DCIT API & Integration

  • Unified API layer connecting all systems
  • Event-driven architecture for real-time updates
  • Comprehensive API documentation (OpenAPI/Swagger)
  • Automated data synchronization across systems
  • Scalable integration patterns that don't break
  • Partner and customer integrations enabled

Core Services

01

RESTful & GraphQL API Design

Modern API architectures with versioning, pagination, filtering, and comprehensive error handling.

02

Third-Party Integrations

Seamless integration with Salesforce, Workday, ServiceNow, and hundreds of other platforms.

03

Event-Driven Architectures

Kafka, RabbitMQ, AWS SNS/SQS messaging for real-time data processing and system coordination.

04

ETL Pipeline Development

Data extraction, transformation, and loading pipelines for complex data workflows.

05

Data Synchronization

Real-time and batch sync strategies that keep your systems consistent and up-to-date.

06

API Gateway Implementation

Rate limiting, authentication, monitoring, and analytics for secure, managed API access.

07

Comprehensive API Documentation

OpenAPI 3.0 specifications, Postman collections, and SDKs for developer-friendly integration.

Integration Development Approach

Connecting your systems with reliable, well-documented APIs.

1

System Mapping & Data Flow Analysis

We inventory your existing systems, data sources, and manual processes to identify integration points and data dependencies. This produces a complete map of how information moves through your organization — and where it gets stuck.

2

API Design & Contract Definition

We design your API contracts using OpenAPI 3.0 specifications before writing any code. This includes resource modeling, endpoint design, authentication schemes, error formats, and versioning strategy. Stakeholders review and approve the API contract so development proceeds with clear, agreed-upon interfaces.

3

Development & Third-Party Integration

We build your APIs and integration adapters, connecting to third-party platforms like Salesforce, Workday, ServiceNow, and custom systems. Each integration includes retry logic, circuit breakers, and error handling that gracefully manages the inevitable failures of distributed systems.

4

Testing & Performance Optimization

Integration testing validates end-to-end data flows across all connected systems. Performance testing measures throughput, latency, and behavior under load. We optimize query patterns, implement caching strategies, and tune connection pools to meet your performance requirements.

5

Documentation & Developer Onboarding

We deliver interactive API documentation with Swagger UI, Postman collections, and code examples in multiple languages. For partner-facing APIs, we create developer guides and onboarding materials that enable external teams to integrate independently without ongoing support from your engineering team.

Ideal For

Companies with disconnected legacy systems
Businesses automating manual data transfers
Organizations building partner/customer integrations

Technology Stack

API Frameworks

Express (Node.js)
FastAPI (Python)
.NET Web API

GraphQL

Apollo Server
GraphQL.js
Hasura

Message Queues

Apache Kafka
RabbitMQ
AWS SQS/SNS

ETL Tools

Apache NiFi
AWS Glue
Custom Pipelines

API Gateway

Kong
AWS API Gateway
Azure API Management

Documentation

OpenAPI 3.0
Swagger UI
Postman

API & Integration Development FAQ

REST is simpler and better for standard CRUD operations with clear resource boundaries. GraphQL excels when clients need flexible queries across multiple resources. We often use both—REST for external APIs and GraphQL for internal frontend consumption.

We implement versioned APIs with backward compatibility guarantees. New versions are deployed alongside existing ones, with deprecation notices and migration guides for affected clients.

Yes. We build adapter layers that can connect to legacy systems via database queries, file-based integrations, screen scraping, or custom middleware—creating modern API interfaces for legacy data.

Both have their place. Real-time sync via events is ideal for critical updates. Batch processing works for large data volumes and non-time-sensitive operations. We design hybrid approaches based on your requirements.

We implement OAuth 2.0, API keys, JWT tokens, and rate limiting as standard. For enterprise integrations, we support mutual TLS, IP whitelisting, and custom authentication schemes.

Connect Your Systems

Stop moving data manually. Let's design APIs that make your systems work together.