Remote SDET: API & Middleware Testing Expert

Openkrill; United States; Remote; USD 2.204.000 - 2.342.000; Vollzeit

Zusammenfassung

Welo Data seeks an SDET focused on API and middleware testing. You will design and maintain automated test suites for gRPC-Web, Proto3, HTTP/2, and JSON-RPC/REST, while exporting sanitized network evidence with traceability to UI actions.

долж You will map schemas, headers, and client parameters, use Mitmproxy/Charles and DevTools to inspect traffic, and develop scripts in Python, Postman, and cURL for functional testing.

Qualifikationen

• Strong hands‑on expertise of 3-5+ years with gRPC‑Web, Proto3, HTTP/2, and JSON‑RPC/REST protocols.
• Proficiency with proxy/traffic inspection tools including Mitmproxy, Charles Proxy, and browser DevTools.
• Solid scripting/programming skills in Python, with practical use of Postman and cURL for API automation.

Aufgaben

• 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 and internal/hidden parameters.
• Collaborate with backend and middleware engineers to define testable contracts and edge-case scenarios.
• Continuously improve test automation frameworks for reliability, speed, and maintainability.
• Document technical findings, automation coverage, and known protocol-level limitations.

Kenntnisse

gRPC-Web

Proto3

HTTP/2

JSON-RPC/REST

Proxy-based inspection

Python

Postman

cURL

API automation

Middleware testing

CI/CD

Tools

Mitmproxy

Charles Proxy

Browser DevTools

Jobbeschreibung

Welo Data seeks an SDET focused on API and middleware testing. You will design and maintain automated test suites for gRPC-Web, Proto3, HTTP/2, and JSON-RPC/REST, while exporting sanitized network evidence with traceability to UI actions.

долж You will map schemas, headers, and client parameters, use Mitmproxy/Charles and DevTools to inspect traffic, and develop scripts in Python, Postman, and cURL for functional testing.