Senior Software Development Engineer in Test

Job Overview

We are looking for a SeniorSDETto test the resilience and correctness of distributed backend systems supporting a high-stakes account provisioning and onboarding workflow.This role is focused on theexecution 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 andmaintainsdisciplined 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.

Project Details

Title:Senior SDET
Rate:$13.5/hr
Start Date:19th October
Duration:5 Weeks
Commitment: 33 Hours per Week
Location:India (Remote)
Job Type:Freelance

Responsibilities

• Analyzedistributed system APIs tovalidatecorrectness, 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 systembehaviorunder 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.
• Validatebehaviorof 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 ofdefensebehaves 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 APIbehavior.
• Correlate replay results with the API schemas and network evidence produced by the Middleware SDET.
• Document observable account/CID lifecyclebehaviorand downstream state changes for handoff
• Capture and archive test logs andevidencein a structured, retrievable format to support audits and post-incident reviews
• Collaborate with backend engineering teams to reproduce, isolate, andvalidatefixes 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.

Required Qualifications

• Strong experienceof 5-8+ years intesting distributed systems andanalyzinginter-service APIbehavior
• Hands-on experience with request payload tampering, fuzzing, or adversarial API testing techniques
• Understanding of layereddefensearchitectures, 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
• 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