Software Testing & QA Services

Flexsin offers a comprehensive range of software testing services including functional and regression testing, test automation, performance and load testing, security testing and penetration testing (VAPT), mobile application testing, API and integration testing, accessibility testing (WCAG), compatibility testing, usability testing, exploratory testing, and QA consulting services.

We use Selenium WebDriver, Cypress, Playwright, and Appium for UI and mobile automation. TestNG, JUnit 5, and Jest for unit testing. RestAssured, Postman/Newman, and Supertest for API testing. k6, JMeter, and Gatling for performance testing. OWASP ZAP, Burp Suite, and SonarQube for security testing. axe-core, NVDA, and Lighthouse for accessibility testing. We select the best tool combination for your specific technology stack.

Manual testing involves a human tester executing test cases and exploring the application - critical for usability evaluation, exploratory discovery, and context-sensitive judgments that automated tools cannot make. Automated testing runs scripted test cases via code - essential for regression suites, CI/CD integration, load simulations, and repetitive verification at a speed and scale no human can match. Effective QA combines both: automation for speed and coverage, manual testing for judgement and discovery.

We configure automated test suites to run as part of your CI/CD pipeline using GitHub Actions, GitLab CI, Jenkins, or Azure DevOps - triggered on every pull request and every main branch push. Faster unit and API tests run on every PR; full E2E regression runs nightly or on release candidates. Quality gates reject builds that fall below coverage thresholds or introduce new critical defects. Performance and security tests run on scheduled jobs before release candidates are promoted to staging.

Our penetration testing service includes a defined scope agreement, OWASP Top 10 assessment, manual expert-led testing using Burp Suite and Metasploit, automated vulnerability scanning, dependency audit using Snyk, and cloud infrastructure security assessment. Deliverables include a full findings report with CVSS-scored vulnerabilities, reproduction steps, attack scenarios, business impact assessment, and prioritised remediation recommendations - in executive summary and technical detail formats.

We run structured performance testing scenarios covering load testing (expected traffic), stress testing (beyond capacity), spike testing (sudden surges), volume testing (large data sets), endurance testing (sustained load over time), and scalability testing (how the system scales). We use k6, JMeter, or Gatling depending on your stack, monitor with Grafana and APM tools, identify bottlenecks at the code, database, infrastructure, and network layers, and provide a detailed performance report with tuning recommendations.

Yes. We test native iOS (Swift/Objective-C), native Android (Kotlin/Java), and cross-platform apps (React Native, Flutter, Ionic). Testing is performed on real physical devices in our lab, supplemented by BrowserStack and Firebase Test Lab cloud grids covering 300+ device-OS combinations. We test functional behaviour, gestures, offline mode, push notifications, device interruptions (calls, battery low), performance under memory constraints, and carrier-specific network behaviour.

WCAG (Web Content Accessibility Guidelines) testing validates that your application meets international accessibility standards - ensuring usability for people with visual, motor, cognitive, and hearing differences. We perform automated testing with axe-core and Lighthouse, manual keyboard navigation testing, screen reader testing with NVDA, JAWS (Windows), and VoiceOver (macOS/iOS), and colour contrast analysis. Accessibility testing opens your product to 1.3 billion users with disabilities, reduces ADA legal risk, and often improves SEO performance.

We embed QA engineers directly into your Scrum teams - attending sprint planning, writing test cases from user stories, testing features as they are built within the sprint (not at the end), and maintaining living regression suites that grow with the product. We practice Shift-Left testing, Three Amigos sessions, BDD with Cucumber where appropriate, and continuous testing via CI/CD integration - ensuring there is no testing bottleneck that prevents sprint-end release confidence.

Standard QA engagement deliverables include: Test Strategy Document, Test Plan, Test Case suite (in Jira/Xray or TestRail), Test Execution Report (pass/fail matrix), Defect Report (with JIRA tickets), Test Summary Report with quality gate assessment, Release Recommendation, automated test scripts (committed to your repository), performance test results with Grafana dashboard, and for security engagements a full VAPT findings report with CVSS scores and remediation recommendations.

Yes. Independent testing is one of our most requested engagements - where organisations need an objective, unbiased QA assessment of their own product, a vendor's software deliverable, or a product approaching regulatory review. Our independent QA team has no relationship with the development team, no pressure to pass tests, and no incentive to miss defects. We provide an objective test summary report with clear findings that development teams and stakeholders can act on.

A baseline automation framework (project structure, base classes, CI/CD integration, first 50 test cases) takes 3-5 weeks. A comprehensive framework covering UI, API, and mobile with 200+ tests takes 8-12 weeks. Full regression suite coverage for a complex enterprise application takes 3-6 months of incremental test authoring alongside delivery sprints. We provide a working framework with initial tests in the first sprint - not a 3-month setup before testing begins.

We offer Project-Based QA (fixed scope testing engagement with a release sign-off report), Dedicated QA Teams (embedded engineers working within your sprints), Test Automation as a Service (framework build and maintenance retainer), and QA Consulting and Audit (maturity assessment, test strategy review, or independent product audit). We recommend the right model based on your release frequency, team structure, and quality maturity.

Book a free 60-minute QA discovery session. We'll review your application, current testing coverage, release process, and quality pain points - and present a detailed QA engagement proposal with recommended testing types, toolchain, team structure, timeline, and investment estimate within 48 hours at no charge. We also offer a free QA audit of your existing test coverage if you have an automation framework already in place.