We are looking for a Software Testing Engineer (.NET) to join a team developing digital learning solutions for schools, families, and students across the United States. In this role, you will ensure the quality and reliability of web and mobile applications built on the .NET technology stack. You will analyze requirements, design and execute test scenarios, identify and investigate defects, and work closely with developers and product stakeholders throughout the software development lifecycle. You will also contribute to continuous improvement of testing practices and help ensure that product functionality meets business requirements and quality standards. Additional Information: The project team collaborates with stakeholders based in the United States. Some flexibility in working hours may be required to attend shared stand-ups and coordination meetings across time zones. Responsibilities Analyze functional requirements and visual designs to identify testing needs and potential quality risks Develop and review test plans, test strategies, test cases, and other testing artifacts Perform functional, exploratory, regression, API, database, cross-browser, and accessibility testing of web and mobile applications Prioritize test cases based on business impact, risk, and release requirements Execute tests, maintain testing records, and report testing progress and results Identify, document, track, and troubleshoot defects, providing clear and actionable information to the development team Collaborate with developers, Product Owners, Scrum Masters, and other stakeholders throughout the software development lifecycle Participate in Agile ceremonies, contribute to estimation, and support release activities Perform root cause analysis (RCA) and recommend improvements to prevent recurring issues Support test automation engineers by maintaining test cases and communicating changes in application functionality Contribute to continuous improvement of team testing practices and quality assurance processes Provide testing support to other teams when needed Requirements 3+ years of experience in software testing or quality assurance Practical experience working in Agile software development environments Ability to analyze functional requirements and visual designs and translate them into effective test scenarios Knowledge of test design techniques and experience creating, documenting, and reviewing formal test cases Understanding of test prioritization, Definition of Ready (DoR), and Definition of Done (DoD) Experience with defect reporting, tracking, and investigating defects Experience in cross-browser testing and using browser developer tools or extensions Understanding of functional and non-functional quality aspects, including accessibility and API testing Proactive approach to identifying quality risks and improving testing processes Strong analytical, problem-solving, and communication skills English proficiency at B2 level or higher