Senior QA Automation & Performance Engineer (Web, Mobile & Load)

About the Role

We are seeking an experienced QA Automation & Performance Engineer (SDET) to lead quality assurance, test automation, and heavy-load performance engineering for our flagship B2B E-Commerce Marketplace.

Our ecosystem consists of three modern React web applications (Buyer Marketplace, Supplier Portal, and Admin Dashboard), two native mobile applications (iOS in Swift and Android in Kotlin), and a Node.js / MongoDB (Amazon DocumentDB) backend hosted on AWS.

You will be responsible for designing and scaling our automated testing frameworks from the ground up across browsers and mobile devices, as well as executing heavy-load and stress tests to ensure our platform can handle thousands of concurrent buyers, suppliers, bulk catalog operations, and high-traffic commercial events without performance degradation.

Key Responsibilities

1. Performance, Stress, and Heavy Load Testing

• Design, script, and execute load, stress, spike, and endurance tests using tools such as Grafana k6, Apache JMeter, Gatling, or Locust.
• Simulate high-volume production B2B traffic, including thousands of concurrent users searching large product catalogs, filtering complex attributes, uploading bulk media to AWS S3, and submitting Requests for Quotation (RFQs).
• Collaborate with Backend (Node.js/Express) and DevOps (AWS ELB, NGINX, DocumentDB) teams to identify performance bottlenecks, slow database queries, memory leaks, and server concurrency limitations.
• Establish performance baselines and Service Level Agreement (SLA) thresholds, including response time, P95/P99 latency, throughput/requests per second (RPS), and error rates.

2. Web Browser Test Automation

• Build, maintain, and scale end-to-end (E2E) cross-browser automation frameworks using Playwright (preferred), Cypress, or Selenium with TypeScript/JavaScript.
• Automate critical B2B workflows across the company's three React-based web platforms:
• Buyer Website: Product search, multi-tier pricing and Minimum Order Quantity (MOQ) calculations, RFQ submission, OAuth login, and checkout flows.
• Supplier Dashboard: Product creation, image cropping and uploads, inventory updates, and order management.
• Admin Portal: Supplier KYC verification, catalog moderation, and role-based access control (RBAC).
• Validate multilingual localization (i18n) and right-to-left (RTL) and left-to-right (LTR) layouts in Arabic and English across desktop and mobile web viewports.

3. Native Mobile Application Automation (iOS and Android)

• Design and maintain automated UI and regression test suites for native iOS (Swift/SwiftUI/UIKit) and Android (Kotlin) applications using Appium, Maestro, XCUITest, or Espresso.
• Automate mobile-specific features, including push notifications (FCM), camera and QR/barcode scanning, offline caching (Core Data/Room), geolocation/maps, and deep linking.
• Execute automated tests on real-device cloud platforms such as BrowserStack, AWS Device Farm, and Sauce Labs, as well as local Xcode Simulators and Android Emulators.

4. API and Integration Testing

• Convert manual Postman collections into automated API test suites using Newman, Playwright API, RestAssured, or SuperTest.
• Validate RESTful API contracts, JSON schemas, status codes, JWT authentication, session security, and edge-case error handling.
• Test asynchronous processes and third-party integrations, including Google Cloud Vision and Translation APIs, AWS S3 uploads, and email/push notification triggers.

5. QA Process and CI/CD Integration

• Upgrade test management workflows from Excel/Google Sheets to structured test management tools integrated with Jira, such as Xray, Zephyr, or TestRail.
• Integrate Web, Mobile, API, and Performance test suites into CI/CD pipelines using GitHub Actions or GitLab CI.
• Implement automated quality gates for every pull request and release to maintain software quality and reliability.

Must-Have Technical Skills:

• Experience: 3–6+ years of hands-on experience in QA Automation, SDET, and Performance Testing for high-traffic web and mobile applications.
• Performance & Load Testing: Proven track record of conducting heavy load and stress testing on production-grade APIs and web platforms using k6, JMeter, or Gatling, with the ability to analyze server/database metrics and generate actionable diagnostic reports.
• Web Automation: Strong proficiency in Playwright or Cypress (using TypeScript or JavaScript) testing modern Single Page Applications (specifically React.js and UI libraries like Tailwind CSS and Ant Design).
• Mobile Automation: Hands-on experience automating native iOS and Android apps using Appium, Maestro, or native frameworks (XCUITest / Espresso), including configuring Xcode and Android Studio test environments.
• API Testing: Deep expertise in Postman, REST API architecture, HTTP protocols, Authentication (JWT, OAuth2), and automated API testing tools (Newman or code-based frameworks).
• QA Fundamentals: Mastery of STLC, Bug Life Cycle, Boundary Value Analysis, Equivalence Partitioning, and Decision Table Testing.
• Tooling: Proficiency with Git/GitHub, Jira, and Chrome DevTools (network inspection, payload debugging, and frontend performance profiling).

Nice-to-Have (Bonus) Skills:

• Prior experience testing B2B or B2C E-Commerce Marketplaces (multi-vendor workflows, complex catalogs, bulk Excel/CSV imports, payment gateways).
• Familiarity with Node.js, MongoDB / Amazon DocumentDB, and AWS infrastructure (EC2, ELB, S3, CloudWatch) to help diagnose backend bottlenecks during load testing.
• Experience with Security / DAST testing tools such as OWASP ZAP or Burp Suite (testing for broken access control/IDOR, XSS, and rate-limiting).
• Experience testing Arabic/English (RTL/LTR) interfaces.

What We Offer

• The opportunity to architect and own the entire Automation and Performance QA strategy for a high-growth B2B marketplace ecosystem.
• A modern tech stack (React 19, TypeScript, Node.js, Native Swift & Kotlin, AWS Cloud).
• Competitive salary and career growth into a QA Architect / Lead SDET role.