Software Engineer at Total Shift Left
Sushant is a Software Engineer at Total Shift Left with hands-on experience in both automation and manual testing of frontend and backend applications. He is a Total Shift Left platform expert who builds API automation solutions for customers across industries. His day-to-day work — designing test workflows, debugging integration failures, and scaling automation suites — directly informs his writing on practical testing strategy, test data management, and CI/CD quality gates.
Eighteen AI testing tools sorted into the five jobs they actually do — spec-driven generation, traffic recording, self-healing UI, authoring assistants and LLM evals — with what each is genuinely good at and what to verify in a trial.
The agentic QA tool landscape in four groups, what agentic actually means, the four questions that separate a usable tool from a demo, and how to put one in a pipeline without losing determinism.
What an API testing framework actually is, the three real categories to choose between, and a practical decision framework based on team language, CI/CD needs, and who should be able to read the tests.
How to build an LLM eval suite that actually catches regressions — dataset design, scoring functions, LLM-as-judge calibration, thresholds, CI gating and the tooling landscape.
A practical method for testing LLM-backed features — deterministic shell versus probabilistic core, invariant tests, golden-set evals, regression on prompt changes, and what to run in CI.
The 9 distinct types of API testing explained — what each one catches, when to run it in your pipeline, and how they fit together into a complete test strategy.
k6 vs JMeter vs Gatling compared on scripting language, resource efficiency, CI integration, reporting and protocol support — with the same scenario written in all three.
curl vs Postman compared on scripting, reproducibility, CI, debugging and collaboration — with the exact curl flags worth knowing and how to convert between the two.
A beginner's guide to Postman for API testing: building requests, pm.test() assertions, Collections and Environments, chaining requests, and running everything headless in CI/CD with Newman.
