Posted today · be early
Senior SDET – (India)
Welo Global
IndiaremotePosted today
Skill Required
SDETQA-EngineerSoftware-Test-EngineerAPI-TesterTest-EngineerSenior-SDETSenior-SDET-EngineerRemote-Senior-SDETSDET-EngineerSenior-Software-Development-Engineer-In-Test-(SDET)Software EngineerSoftware DeveloperSystem DesignPostmanEngineeringanalyticalbuildingwrittenTestNGDesign PatternsAPIsandAIContract
Key highlights
- Experience level: 5-8+ years
- Key benefit: Limitless flexibility with project scheduling
- Notable requirement: Experience in testing distributed systems and inter-service API behavior
Role overview
We are looking for a Senior SDET to test the resilience and correctness of distributed backend systems supporting a high-stakes account provisioning and onboarding workflow. This role is focused on the execution of pre-approved, benign tracer/replay scenarios against staging endpoints, analysis of request/response behaviour, and documentation of observable account/CID lifecycle and downstream state behaviour. The ideal candidate has strong distributed-systems and API-testing experience and maintains disciplined technical evidence capture and traceability. This role is not intended to perform unrestricted adversarial testing; testing activities will be limited to approved staging environments and pre-approved benign scenarios.
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 behavior of near-real-time inline checks (evaluated within milliseconds at the gateway) as distinct from longer-running background verification/risk pipelines (evaluated over minutes to hours), confirming each layer of defense behaves as expected
- Verify data persistence, referential integrity, and correct linkage of related records/relationships written by backend services during processing
- Execute controlled replay suites and compare expected versus observed API behavior.
- Correlate replay results with the 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 to support audits and post-incident reviews
- Collaborate with backend engineering teams to reproduce, isolate, and validate fixes for distributed-system defects
- Contribute to test strategy for backend/middleware reliability, including failure-mode and chaos-style testing
- Maintain traceability between test evidence, defects, and system requirements
- Reconcile backend observations with the frontend FSM and middleware/API evidence produced by 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 the distinction between 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
Nice to have
- 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 while collaborating with a global leader in AI data services and localization.
- Limitless Growth: Apply your skills, access diverse content types, develop through structured learning, and explore career paths that can lead to permanent roles.
- Limitless Support: Be part of a global community with real-time assistance from our Community Experience team.
Additional details
- #L1-CC1
- Welo Data, part of Welocalize, is a global AI data company with 500,000+ contributors delivering high-quality, ethical data to train the world’s most advanced AI systems.
- Originally posted on Himalayas
