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 Quality Assurance
Comprehensive QA strategy, test planning, defect management, and release governance. Lower your bug count, raise your release velocity.
Software Testing — Manual & Automation
Functional, regression, UAT, smoke, and exploratory testing — plus Selenium, Cypress, Playwright automation frameworks built to scale with you.
Ready to get started?
Tell us your goals — we'll come back with a plan in 48 hours.