API & Performance Testing
APIs that are bulletproof and lightning-fast
An API outage at peak traffic doesn't just frustrate users — it costs revenue and trust. Just Soft Solution validates APIs end-to-end: contract testing (Postman, REST Assured, Pact), security testing (OWASP API Top 10), and performance testing under realistic load (JMeter, k6, Gatling, LoadRunner). We model real user behavior, ramp to 10× expected peak, and surface bottlenecks — DB queries, N+1s, memory leaks, slow third parties — before launch. Reports include actionable fixes, not just charts.
Why choose API & Performance Testing with us
Contract testing
Postman, REST Assured, Pact — versioned and CI-integrated.
Realistic load modeling
Real user journeys, not synthetic ping floods.
Bottleneck identification
Profiling, APM, query analysis, infra metrics.
OWASP API Top 10
Auth, injection, broken object level authorization, mass assignment — covered.
Performance budgets
p95, p99, throughput SLAs, error budgets.
Actionable reports
Root cause + recommended fix, not just graphs.
How we deliver API & Performance Testing
Scope
Critical APIs, SLAs, target load, success criteria.
Script
Test scripts, data, parameterization, scenarios.
Run
Smoke, load, stress, soak, spike — all four.
Report
Findings, root cause, recommendations, retest.
What we work with
Frequently asked questions
Tens of thousands of concurrent users from distributed cloud agents.
Yes — including rate-limit handling, retry logic, circuit breakers.
Yes. Query depth, complexity, n+1, persisted queries — we cover the GraphQL-specific risks.
We test against staging or production-mirror environments. Production tests only with controls and your sign-off.
You might also need
Software Testing — Manual & Automation
Functional, regression, UAT, smoke, and exploratory testing — plus Selenium, Cypress, Playwright automation frameworks built to scale with you.
Software Quality Assurance
Comprehensive QA strategy, test planning, defect management, and release governance. Lower your bug count, raise your release velocity.
Ready to get started?
Tell us your goals — we'll come back with a plan in 48 hours.