Quality Assurance – Performance Tester

Info Sum is WPP’s privacy-first data collaboration technology, trusted by global businesses to unlock the full potential of their first‑party data without risk. Its patented, cross‑cloud, decentralized collaboration technology leverages advanced Privacy‑Enhancing Technologies (PETs) to radically transform how companies generate audience intelligence and drive better customer experiences. As the foundational infrastructure underpinning WPP Open, Info Sum powers trusted data collaboration across every cloud, client, and capability.

As a member of the QA team with responsibility for performance testing, you will design, build, and maintain scalable, high‑value performance assessment tests to reduce performance risk for Info Sum’s data collaboration platform. You will work closely with cross‑functional teams, including frontend engineers, backend engineers and infrastructure teams, to identify areas for testing and deliver robust and efficient solutions. This role requires expertise in performance test design, execution and reporting to a team of engineers and reporting findings to senior management.

The focus on performance must be balanced with the needs for cost sensitivity, security and reliability.

• Design and implement scalable, high‑value performance tests that support engineering needs.
• Identify and test performance bottlenecks to ensure smooth operation under high loads.
• Maintain security best practices to protect data and ensure compliance with industry regulations.
• Develop automated testing strategies to monitor performance and system reliability.
• Provide long‑term performance analysis records and reports.
• Work with product, backend, frontend and infrastructure teams to ensure seamless integration and deployment of automated performance tests.
• Provide performance testing mentorship to the QA team and contribute to team knowledge sharing.
• Work with the teams to implement monitoring and logging solutions to proactively detect and address issues in production.
• Stay updated on emerging technologies and apply best practices to improve system efficiency and maintainability.

• Understand and comply with Info Sum’s security and privacy policies, maintaining a strong focus on information security in all backend‑related activities.

• 5+ years of experience in performance testing, with expertise in relevant tool suites.
• Understanding of distributed data‑driven systems, microservices architecture, and RESTful APIs.
• Experience with cloud platforms (AWS, Azure, or GCP) and containerization (Docker, Kubernetes).
• Knowledge of scalability strategies, microservices architecture, load balancing, caching, batch processing and event‑driven architectures, in particular Kafka.
• Strong experience with CI/CD pipelines and automated testing to ensure reliable deployments.
• Excellent problem‑solving skills with the ability to diagnose and resolve complex technical issues.
• Strong collaboration and communication skills to work effectively in a cross‑functional team.

You're open‑minded: to new ideas, new partnerships, new ways of working.

You're optimistic: we believe in the power of creativity, technology and talent to create brighter futures for our people, clients and communities. We approach all that we do with conviction: to try the new and to seek the unexpected.

You're extraordinary: we are stronger together through collaboration to achieve the amazing. We are creative leaders and pioneers of our industry; we provide extraordinary every day.

Passionate, inspired people – We aim to create a culture in which people can do extraordinary work.

Scale and opportunity – We offer the opportunity to create, influence and complete projects at a scale that is unparalleled in the industry.

Challenging and stimulating work – Unique work and the opportunity to join a group of creative problem solvers.

We believe the best work happens when we're together, fostering creativity, collaboration, and connection. That's why we’ve adopted a hybrid approach, with teams in the office around four days a week. If you require accommodations or flexibility, please discuss this with the hiring team during the interview process.

WPP is an equal opportunity employer and considers applicants for all positions without discrimination or regard to particular characteristics. We are committed to fostering a culture of respect in which everyone feels they belong and has the same opportunities to progress in their careers.

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