> Markdown version of [/jobs/ext/2988898-manual-qa-engineer-retail-pos-tax-validation](https://www.wearedevelopers.com/jobs/ext/2988898-manual-qa-engineer-retail-pos-tax-validation). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Manual QA Engineer - Retail POS Tax Validation - **Company:** Capgemini - **Location:** Seattle, WA, United States - **Experience:** Experienced - **Salary:** $68,911.0 - $161,544.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Application Testing, JIRA, Microsoft Azure, Software Bug Management, Regression Testing, E2e Testing, Standard Sql, Transaction Processing (Computing), Postman, Tools for Reporting, Api Management - **Published:** September 18, 2026 - **Apply:** https://www.capgemini.com/jobs/548239-en_US_SAPBTP/x/ ## About the Role We are seeking a detail-oriented Manual QA Engineer with strong experience testing retail Point-of-Sale (POS) systems and validating U.S. sales tax calculations across multiple jurisdictions. This role is responsible for ensuring the accuracy of tax-related business rules, transaction processing, and end-to-end retail workflows, including sales, returns, refunds, promotions, and payment processing. The ideal candidate will possess a strong understanding of retail operations, tax compliance requirements, and manual testing best practices in a fast-paced Agile environment., * 4+ years of hands-on Manual QA experience with strong expertise in retail POS application testing. * Proven experience validating U.S. sales tax calculations, tax compliance requirements, and jurisdiction-specific tax rules. * Strong understanding of tax exemptions, tax holidays, tax-inclusive and tax-exclusive pricing models, and tax rounding methodologies. * Experience testing retail transaction workflows including sales, returns, exchanges, refunds, voids, promotions, discounts, and gift card processing. * Familiarity with third-party tax engines such as Vertex, Avalara, or similar tax calculation solutions. * Working knowledge of payment processing and tender types, including credit cards, mobile wallets, stored value cards, and gift cards. * Experience working in Agile/Scrum environments with proficiency in defect management tools; knowledge of SQL, API testing, and Postman is highly preferred. ## Description * Design, execute, and maintain comprehensive manual test cases and test scenarios for POS tax calculation and transaction processing functionality. * Validate U.S. sales tax calculations across state, county, city, district, and special tax jurisdictions to ensure regulatory compliance. * Test tax-related business scenarios involving merchandise, food and beverage items, gift cards, discounts, promotions, loyalty rewards, and digital transactions. * Verify tax behavior and calculations for sales, refunds, exchanges, returns, voids, reversals, and post-void transactions. * Perform end-to-end testing across POS, payment processing, back-office systems, tax engines, and reporting platforms. * Investigate, document, and track defects, tax discrepancies, and edge-case scenarios using Jira, Azure DevOps, or similar tools. * Collaborate with Product Owners, Business Analysts, Developers, and Tax Compliance teams to support requirements validation, defect resolution, regression testing, and release readiness. ## Related Videos - [Taming the Beast: Building Autonomous Agents to Solve German Tax Bureaucracy](https://www.wearedevelopers.com/videos/1965-taming-the-beast-building-autonomous-agents-to-solve-german-tax-bureaucracy) - [Let's get visual - Visual testing in your project](https://www.wearedevelopers.com/videos/540-let-s-get-visual-visual-testing-in-your-project) - [Are Your APIs Ready for AI Agents](https://www.wearedevelopers.com/videos/2004-are-your-apis-ready-for-ai-agents) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [Why I Love End-2-End Tests and How To Get Them Right](https://www.wearedevelopers.com/videos/996-why-i-love-end-2-end-tests-and-how-to-get-them-right) - [How I Built QA from Scratch in a Scaling Startup - no fluff real life story](https://www.wearedevelopers.com/videos/2041-how-i-built-qa-from-scratch-in-a-scaling-startup-no-fluff-real-life-story) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [Highest Paying Tech Companies in Europe](https://www.wearedevelopers.com/magazine/162-highest-paying-tech-companies-in-europe) - [Integration And E2E Testing: Are They Complementary or Interchangeable?](https://www.wearedevelopers.com/magazine/86-integration-and-e2e-testing-are-they-complementary-or-interchangeable) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Benefits of Using JMeter For Performance Testing](https://www.wearedevelopers.com/magazine/96-benefits-of-using-jmeter-for-performance-testing)