Senior SDET – India

Posted 1ds ago

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Job Description

Senior SDET testing distributed backend systems for Welo Data’s global AI data services. Executing controlled API replay scenarios and documenting account lifecycle behavior.

Responsibilities:

Analyze distributed system APIs to validate correctness, consistency, and failure handling across services involved in account creation, data persistence, and related record-linking
Execute pre-approved request variations and boundary-validation scenarios using sanitized tracer payloads against designated staging endpoints
Investigate system behavior under malformed, malicious, or unexpected inputs and document findings clearly
Capture complete request/response evidence, including HTTP status codes, latency, headers, and payload bodies, subject to approved data-handling requirements
Validate near-real-time inline checks and longer-running background verification/risk pipelines
Verify data persistence, referential integrity, and correct linkage of related records and relationships
Execute controlled replay suites and compare expected versus observed API behavior
Correlate replay results with API schemas and network evidence produced by the Middleware SDET
Document observable account/CID lifecycle behavior and downstream state changes for handoff
Capture and archive test logs and evidence in a structured, retrievable format
Collaborate with backend engineering teams to reproduce, isolate, and validate fixes for distributed-system defects
Contribute to backend/middleware reliability test strategy, including failure-mode and chaos-style testing
Maintain traceability between test evidence, defects, and system requirements
Reconcile backend observations with frontend FSM and middleware/API evidence from earlier workstreams

Requirements:

Strong experience of 5-8+ years in testing distributed systems and analyzing inter-service API behavior
Hands-on experience with request payload tampering, fuzzing, or adversarial API testing techniques
Understanding of layered defense architectures, including synchronous/inline validation and asynchronous/background verification processes
Familiarity with testing data persistence and relational/hierarchical integrity in backend data stores
Demonstrated discipline in test log archival, evidence capture, and structured documentation practices
Solid understanding of backend/middleware architecture, failure modes, and system boundaries
Familiarity with API testing tools and scripting for building custom fuzzing/tampering test cases
Strong analytical and investigative skills for root-causing complex, systemic defects
Experience executing controlled API replay or staging validation is strongly preferred
Experience correlating API responses with observable application/account lifecycle states is preferred
Experience supporting audit, compliance, or evidence-based reporting requirements is a plus

Benefits:

Limitless Flexibility: Work on projects that fit your schedule
Access to diverse content types
Structured learning and career development opportunities
Career paths that can lead to permanent roles
Global community with real-time assistance from the Community Experience team

Senior SDET – India

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