Senior Manual QA Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Manual QA Engineer based in United States. This is a senior quality engineering opportunity focused on delivering reliable, high-quality experiences across complex web, mobile, API, and backend systems. You will own testing strategies for critical customer journeys including authentication, account management, promotions, rewards, loyalty mechanics, and geolocation. The role combines hands-on manual testing with risk assessment, exploratory testing, defect investigation, and release readiness. You will work closely with Product and Engineering teams to identify risks early and strengthen quality throughout the software development lifecycle. The position also emphasizes modern QA practices, including AI-assisted tools that improve test coverage, accelerate debugging, and increase testing efficiency. You will have the opportunity to mentor other QA engineers while influencing testing processes, tooling, and quality standards. The ideal candidate is analytical, detail-oriented, proactive, and comfortable taking ownership in a fast-paced, complex Agile environment.

Participate throughout the software development lifecycle to ensure product quality, stability, and release readiness. Review product and technical requirements and translate them into effective test strategies, coverage, and risk assessments. Design, maintain, and execute test plans, test cases, and exploratory testing strategies across web, mobile, API, and backend systems. Perform regression, integration, system, and end-to-end testing for critical customer-facing features and workflows. Validate authentication, account management, promotions, rewards, loyalty points and tiers, redemption flows, and geolocation functionality. Identify, document, track, troubleshoot, and support the resolution of software defects. Assess release risk and provide clear QA recommendations for complex features, integrations, and customer journeys. Partner closely with Engineering and Product teams to identify quality risks early and improve product quality throughout development. Use tools such as Postman, Swagger, browser DevTools, Charles Proxy, Proxyman, and mobile emulators to validate functionality and investigate issues. Validate backend integrations and data consistency using SQL queries, debugging tools, and related technical techniques. Apply AI-assisted tools to improve test coverage, test design, defect investigation, and overall QA efficiency. Take ownership of testing strategy and execution for complex features and initiatives. Mentor junior and mid-level QA engineers on testing methodologies, debugging, and quality best practices. Contribute to continuous improvement of QA processes, tools, documentation, and test coverage. Help drive successful releases with strong coverage, minimal production defects, and reliable customer experiences. Requirements: 5+ years of professional software quality assurance experience, with a strong focus on manual testing. Strong experience testing web and mobile applications in complex production environments. Solid understanding of SDLC, STLC, QA methodologies, and software testing best practices. Hands-on experience testing APIs using tools such as Postman or Swagger. Strong troubleshooting and debugging capabilities across frontend and backend systems. Experience with browser DevTools, Charles Proxy, Proxyman, mobile emulators, and similar diagnostic tools. Familiarity with databases and the ability to write SQL queries for data validation and troubleshooting. Demonstrated experience integrating AI-assisted tools into QA workflows, including test design, debugging, defect analysis, or test coverage. Ability to independently prioritize testing activities, assess risk, and take ownership of quality outcomes. Strong analytical thinking, attention to detail, and problem-solving skills. Excellent communication and collaboration skills within cross-functional Agile teams. Proactive mindset with a strong focus on customer experience, continuous improvement, and quality ownership. Experience in sportsbook, casino gaming, fintech, or another regulated industry is a plus. Familiarity with test automation frameworks or scripting languages such as Python is a plus. Experience testing authentication, geolocation, payments, CRM, or account management workflows is a plus. Curiosity and adaptability when working with emerging technologies and AI-assisted QA practices. Benefits: Competitive pay and benefits. Flexible vacation allowance. Hybrid/remote working environment. Opportunity to work on complex, high-volume digital products and critical customer journeys. Hands-on exposure to web, mobile, API, backend, database, and geolocation testing. Opportunity to incorporate AI-assisted tools into modern QA workflows. Senior-level ownership of testing strategy, release readiness, and quality improvement. Mentoring and collaboration opportunities with QA, Engineering, and Product teams. Startup-style culture supported by a secure, globally recognized brand. Inclusive and diverse working environment where employees are encouraged to bring their authentic perspectives and skills. Opportunity to influence QA processes, tooling, test coverage, and product quality at scale.