Integration Testing Services
Uncover defects and unwanted behavior in different integration points.
Integration Testing Services to Ensure Seamless Software Interactions
Build confidence in your application’s ecosystem. CelticQA’s integration testing services validate communication between software modules, systems, and third-party tools—ensuring that your application delivers consistent, defect-free performance across platforms.
Why Integration Testing Matters
Modern applications are complex. They rely on APIs, third-party platforms, microservices, and internal modules to exchange data and complete workflows. If these systems don’t communicate effectively, your product fails—and so does user trust.
That’s where CelticQA comes in.
Our QA integration testing services verify that your components interact exactly as they should—so you can:
- Catch integration issues early
- Improve data accuracy and workflow consistency
- Reduce post-release failures
- Shorten development cycles
- Save time and costs across SDLC
What Is Integration Testing?
Integration testing evaluates how various software components or systems interact with one another. It focuses on the interfaces and data flow between units that may already work in isolation but fail when combined.
We test integrations such as:
- Module-to-module interactions
- Internal API calls
- Third-party API integrations (Salesforce, banking systems, etc.)
- SSO and authentication flows
- Data transfer validation between systems
Our Integration Testing Approaches
We use proven testing strategies based on system architecture, project scope, and business needs:
Bottom-Up Testing
Start with lower-level modules (e.g., APIs or services) and test upward. Ideal for microservices and scalable architectures.
Top-Down Testing
Begin with higher-level modules and simulate lower ones. Great for validating workflows early in development.
System Integration Testing
Test integrations with third-party solutions like Salesforce, Dynamics 365, Oracle CRM, or internal tools to ensure seamless cross-system data flow and secure communication. We focus on validating: API responses and data mapping, security protocols and permissions, end-to-end data integrity, user access and authentication
Sandwich/Hybrid Testing
Combine top-down and bottom-up for parallel testing. Perfect for large, complex systems with many interdependent modules.
Big Bang Testing
Test all integrated components simultaneously. Useful for smaller applications or final-stage validation.
Benefits of Integration Testing Services
When you partner with CelticQA, you gain more than just test execution—you gain a QA strategy:
- Faster Defect Detection – Catch bugs at integration points early
- Repeatable, Automated Tests – Save time across releases with automation
- Lower QA & Dev Costs – Fewer post-release issues mean less rework
- Improved Application Quality – Fewer production defects, better user experience
- Cross-Team Collaboration – Our testers work alongside your Dev and DevOps teams
Why Choose CelticQA for Integration Testing?
- 20 years of QA experience
- Offices in the US, Ireland, and UK
- Expertise with open-source and licensed tools (Ranorex, Selenium, etc.)
- Senior QA Engineers, Test Leads & Automation Experts
- Proven frameworks for API and integration validation
- Industry coverage: Healthcare, Finance, Pharma, Retail, SaaS
USA
Experience quality assurance with our expert QA Testing Services in the USA.
UK
Elevate your software quality with our tailored Software QA Testing Services in the UK.
Ireland
Quality assurance for your software made easy with our experienced Software QA & Testing Services in Ireland.
Our Key Clients
Ready to Eliminate Integration Risks
Our integration testing services help you launch with confidence—knowing your systems, APIs, and modules are aligned and functioning.
Atlanta, USA
MON – FRI: 9 AM to 5 PM
Dundalk, Ireland
MON – FRI: 9 AM to 5 PM