Job Overview Welo Global is hiring an SDET (Software
Development Engineer in Test) to bring deep technical rigor to
middleware-layer testing. This role requires robust technical
expertise across gRPC-Web, Proto3, HTTP/2, JSON-RPC/REST,
proxy-based traffic inspection, and API scripting. The primary
responsibility is to observe and reconstruct the network
interactions generated by the onboarding UI, including
request/response structures, schemas, headers, identifiers, Enums,
and client-injected parameters. This is primarily an API/network
analysis and evidence-generation role rather than a conventional UI
automation or regression-testing role. The resource will produce
sanitized network evidence and controlled, benign tracer replay
scripts for downstream backend validation. Project Details Title:
SDET - API/Middleware Rate: $9.50/hr Start Date: 19th October
Duration: 5 Weeks Commitment : 35 Hours per Week Location: India
(Remote) Job Type: Freelance Responsibilities Design, build, and
maintain automated API test suites covering gRPC-Web, Proto3,
HTTP/2,



and JSON-RPC/REST based services Export clean, sanitized
HAR/network evidence while maintaining traceability between UI
actions and corresponding network requests. Map relevant schemas,
headers, identifiers, routing information, and client-injected
parameters. Use proxy tools such as Mitmproxy, Charles Proxy, and
browser DevTools to inspect, intercept, and validate network
traffic between client and server Develop and maintain API
automation scripts using Python, Postman, and cURL for functional
and regression testing Analyze protocol-level request/response
behavior to identify defects related to serialization, encoding,
and transport Inspect and validate request payload structure,
including system-level headers (e.g., auth tokens, routing
identifiers) and internal/hidden parameters, ensuring correct
handling under both valid and malformed conditions Collaborate with
backend and middleware engineers to define testable

📌 Sdet Api/middleware New Delhi
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📍 New Delhi