Christian Manna Guimma

As a Volunteer Maths Tutor with Action Tutoring, I help pupils who face educational challenges by running focused maths sessions that follow the curriculum and aim to build their understanding, confidence, and achievement. Each week, I spend a minimum of an hour working with small groups of students, either face-to-face or online, using a set programme. I use the workbooks provided to guide our sessions, explain ideas in ways that suit different learners, and support pupils as they tackle difficult topics. Over time, I see students improve their numeracy, become better problem-solvers, and feel more confident about their maths skills. I also collaborate with program coordinators to review progress and adjust sessions based on feedback and assessment results. This role has strengthened my ability to communicate complex ideas simply, support learners with different needs, and contribute meaningfully to improving educational outcomes.

As a QA Analyst at Entertainment Partners, I ensure our enterprise SaaS platforms for film and television productions operate reliably and support key workflows, including casting, payroll, and production management. I work with Agile teams, including product managers, developers, and DevOps engineers, to review requirements, set acceptance criteria, and create test scenarios based on real user journeys. I run functional, regression, system, and API tests to test new features and ensure existing ones continue to work as the platform evolves. A key part of my job is building and maintaining automated tests with JavaScript and Playwright. These tests run in our CI pipelines to give quick, repeatable feedback on every code change and help catch issues before they reach production. I also create API tests to check data accuracy and business logic across services. I investigate defects by reviewing logs, system behavior, and API responses, and I work closely with engineers to identify root causes and confirm fixes. I also help test AI-driven features using structured, data-based methods. In addition to daily testing, I help the team improve our quality approach. I led the transition from an outdated testing tool to a modern, code-based framework, improving our tests' thoroughness, reliability, and maintainability. I also keep clear test documentation and reports in Jira and Confluence to support releases and audits. This role lets me use my technical testing, automation, and teamwork skills to help deliver reliable, high-quality software to customers worldwide.

During my contract with Proper QA, I functioned as a Software QA Engineer, where I played a crucial role in maintaining the quality and integrity of software products. My responsibilities centered around implementing comprehensive testing strategies to ensure software met the highest standards of quality and reliability. Key Responsibilities: • Developed and executed test plans and test cases for a wide range of software applications. • Conducted both manual and automated testing to identify bugs, glitches, and areas for improvement. • Collaborated closely with development teams to ensure efficient bug tracking and resolution. • Assisted in streamlining QA processes, implementing best practices to enhance testing efficiency. • Actively participated in Agile meetings and contributed to continuous improvement initiatives. Achievements: • Significantly improved product quality and reduced bug escape rate by 40%. • Instrumental in the successful testing and launch of video games, noted for their exceptional performance and user experience. My experience at Proper QA as a contractor allowed me to contribute significantly to ensuring software quality, while also enhancing my skills in various testing methodologies and tools. I am proud to have been part of a team that consistently delivered high-quality software products.

In my role as a Software Test Engineer at High Tech Plus, I was instrumental in ensuring the quality and performance of cutting-edge software products. My responsibilities involved both the development and execution of comprehensive testing strategies to guarantee software reliability and efficiency. Key Responsibilities: • Designed and executed detailed test plans and test cases for a variety of software products. • Collaborated closely with software developers to identify and resolve technical issues. • Engaged in both manual and automated testing to ensure comprehensive coverage. • Analyzed test results, reported defects, and worked on their resolution to enhance software quality. • Played a key role in the continuous improvement of testing processes and practices. Achievements: • Contributed to a significant reduction in post-release defects, enhancing customer satisfaction. • Developed an automated testing framework that reduced the overall testing cycle by 35%. My tenure at High Tech Plus was marked by a steadfast commitment to quality and a passion for leveraging technology to solve complex testing challenges. I am proud of my contribution to delivering high-quality software solutions that met both the company’s and customers’ standards.

As a freelance User Acceptance Tester with UserTesting for three years, I specialized in evaluating and providing feedback on a wide range of digital products and services. My role was pivotal in ensuring that these products met user expectations and were intuitive, efficient, and user-friendly. Key Responsibilities: • Conducted user acceptance tests on various websites, applications, and digital products to assess user experience and functionality. • Provided detailed feedback and recommendations to clients based on user experience, usability, and functionality. • Collaborated with product teams to understand their objectives and testing requirements. • Created comprehensive reports outlining findings and suggesting improvements to enhance user satisfaction. Achievements: • Successfully tested and provided feedback for over 100 digital products, contributing to their refinement and user satisfaction. • Recognized by clients for providing insightful, actionable feedback that led to significant improvements in product design and user experience. • Developed a reputation for meticulous testing and reliable reporting, leading to repeat engagements and referrals. Throughout my freelance career with UserTesting, I have been committed to helping clients realize the full potential of their products from a user’s perspective. My focus has always been on enhancing the end-user experience, ensuring that products are not only functional but also enjoyable and easy to use.

During my tenure at the London School of Informatics, I played a pivotal role in ensuring the quality and performance of educational software and digital platforms. My responsibilities were centered around meticulously testing software to guarantee its functionality and user-friendliness, particularly for academic and administrative purposes. Key Responsibilities: • Conducted thorough manual and automation testing of software applications to identify bugs and usability issues. • Collaborated closely with development teams to communicate test findings and suggest improvements. • Developed detailed test plans and cases to cover various software functionalities and user scenarios. • Participated in the design and review of software features, providing insights from a testing perspective. • Assisted in the implementation of automated testing procedures to enhance testing efficiency. Achievements: • Significantly improved software user experience for students and faculty by identifying and reporting critical usability issues. • Enhanced software reliability, leading to a 25% reduction in user-reported issues. • Contributed to the successful launch of web app products, which commended for its smooth operation and user-centric design. My experience at the London School of Informatics has been instrumental in honing my software testing skills. I was dedicated to ensuring that all software products not only met technical specifications but also provided an intuitive and seamless experience for the end-users in the educational sector.

As an Automation Engineer, I built reliable test frameworks, improved release pipelines, and raised product quality across several teams. My efforts reduced manual work, sped up release cycles, and gave teams a clearer view of each build’s health. I designed and maintained automation frameworks with Playwright, Selenium, and Pytest for cross-browser and cross-platform testing. These frameworks were modular, easy to maintain, and well-suited to Agile teams. I also led the move from legacy tools to modern frameworks, cutting execution time by about 40 percent and improving stability and coverage. I set up and maintained CI/CD pipelines using Buildkite, Jenkins, and GitHub Actions, adding automated tests to daily development and release workflows. This ensured every code change was automatically checked, and issues were caught early. I worked with developers, product managers, and QA teams to define an automation strategy, establish quality gates, and ensure test data and environments aligned with real-world needs. To cover more than just the user interface, I added API tests and performance checks. This helped the team thoroughly review business rules, data flows, and system behavior. I also built dashboards that gave clear, real-time views of test results, failures, and trends, so teams could better understand quality and make smart release decisions. Alongside my technical work, I mentored junior QA engineers to help them grow their automation, coding, and debugging skills. I promoted a shift-left approach by adding automated checks earlier in development, reducing late surprises and making the process more efficient. I also tracked key metrics such as execution time, coverage growth, and defect escape rates to measure the impact of automation and guide further improvements.

I have been integral in ensuring the quality and reliability of our software products. My role involves a blend of software development and testing, where I contribute to both the creation and execution of test plans, as well as the development of automated testing frameworks. Key Responsibilities: • Design and implement automated testing frameworks to streamline testing processes. • Develop and maintain a robust suite of test cases for various software products. • Collaborate with software development teams to identify and resolve defects. • Participate in the full software development lifecycle, with a focus on quality assurance. • Analyze test results, document software defects, and provide detailed reports. Achievements: • Improved overall software quality by 30% through rigorous testing and quality assurance practices. • Reduced time-to-market for software releases by 20% with the implementation of automated testing. • Played a key role in the successful launch of software systems, which received positive feedback for its stability and performance. In this role, I was passionate about delivering high-quality software products that meet and exceed customer expectations. My goal was to continually enhance our testing processes and contribute to the development of innovative software solutions.