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 (with the possibility of full time employment based on performance and project needs in all opportunity)

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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, ensurin

📌 SDET - API/Middleware (India)
🏢 Welo Global
📍 India