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 solid 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)

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 han

📌 SDET - API/Middleware (India)
🏢 Welocalize
📍 India