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Performance Test Engineer

Wroclaw, Dolnośląskie, Poland

About us

At Aptitude we love complexity.

We immerse ourselves in the intricacies of finance digitization, subscription management, compliance, and revenue management which gives us the power to make a real impact. Once we understand how an organization works, we can implement software solutions that provide the clarity, confidence, and control they need to drive growth and achieve their ambitions.

Aptitude has served the offices of finance for over 20 years, delivering financial control and insights to empower our clients to achieve their strategies and ambitions. We are currently serving over 75 CFOs whose organisations generate a combined revenue of over $1 Trillion.

We are proud of our growing team of smart, motivated and passionate people, and believe diverse experiences and perspectives build stronger teams and better solutions.

Headquartered in London, we have seven office locations around the world with clients across four continents.

What you'll do and what we offer

We are seeking a highly skilled and experienced Performance Testing Engineer to join our dynamic team. The ideal candidate will have a strong background in performance testing methodologies and tools, with specific expertise in Java, Kubernetes, Kafka, Clickhouse, and Postgres technologies. As a Performance Testing Engineer, you will play a crucial role in ensuring the scalability, reliability, and efficiency of our software applications.


  • Design and Execute Performance Tests:
    • Develop and execute comprehensive performance test plans based on project requirements.
    • Utilize industry-standard tools to simulate real-world scenarios and identify performance bottlenecks.
  • Technology Expertise:
    • Demonstrate proficiency in Java programming for performance testing scripts.
    • Work with Kubernetes to test the scalability and performance of containerized applications.
    • Test the performance of Kafka for handling large-scale data streams.
    • Assess and optimize the performance of Clickhouse and Postgres databases.
  • Collaboration:
    • Collaborate closely with development and operations teams to understand system architecture and application behavior.
    • Provide insights and recommendations for performance improvements based on test results.
  • Analysis and Reporting:
    • Analyze performance test results and provide detailed reports highlighting areas of improvement.
    • Work with cross-functional teams to troubleshoot and resolve performance issues.
  • Automation:
    • Implement and maintain automated performance testing frameworks to streamline testing processes.
    • Continuously evaluate and integrate new tools and techniques to enhance performance testing capabilities.

We’ll provide you with the opportunity to grow your expertise in an environment that supports you, your life and your career.

We’ll also offer you a competitive salary plus profit-related bonus scheme, as well as the following benefits:

  • Private healthcare
  • Life and disability insurance
  • ShareSave scheme – ability to purchase company shares on preferential terms
  • English language lessons during working hours
  • Flexible working conditions and hybrid work model 

What we're looking for

Ideally, you will have the following qualifications and skills: 


  • Bachelor’s degree in Computer Science, Engineering, or a related field.
  • Proven experience as a Performance Testing Engineer in a software development environment.
  • Proficiency in Java programming for creating performance test scripts.
  • Hands-on experience with Kubernetes, Kafka, Clickhouse, and Postgres technologies.
  • Strong understanding of performance testing concepts, methodologies, and tools.
  • Excellent analytical and problem-solving skills.
  • Effective communication and collaboration skills.

Preferred Skills:

  • Experience with performance testing tools such as JMeter, Gatling, or LoadRunner.
  • Knowledge of cloud computing platforms (e.g., AWS, Azure, GCP).
  • Familiarity with CI/CD pipelines and integration of performance testing within DevOps processes.

How to apply

Please click on the ‘Apply now’ button below, including your CV/resume and any other relevant information that will help us get to know you better.

Diversity and Inclusion

If you’re interested in working at Aptitude, but don’t feel you meet every single requirement of the role, we’d still like to hear from you!  A diverse workforce is an essential part of our culture, and we’re dedicated to ensuring that our staff can show up as their authentic self – safe in the knowledge that their differences will be embraced and respected by all. We’re strong advocates of supporting applicants from a wide variety of backgrounds which include different ages, genders, ethnicities, physical abilities and sexual orientation, and we work hard to build the confidence of our workforce through inclusivity, equity and ongoing training. So, if you’re excited about this role but your past experience doesn’t align perfectly with every requirement, we’d encourage you to apply anyway. You might be just the candidate we’ve been looking for, whether it’s for this role or another.

Performance Test Engineer

Wroclaw, Dolnośląskie, Poland

Apply now