Performance Engineer

  • Wunderman Thompson Commerce
  • Remote (Watford, UK)
  • Jun 04, 2020
Full time, Permanent Digital/Creative/Content eCommerce/Retail IT Tech / SaaS / Software

Job Description

Performance Engineer required to work within a highly performant engineering team, who pride themselves on delivering high calibre e-commerce applications to a variety of clients in the FMCG & retail sector.


The individual should possess strong analytical and problem-solving skills and have an eye for detail. We require a highly-motivated individual with well-developed interpersonal skills. You will be the Technical Performance Engineer in a specialist performance team working across Wunderman Thompson Commerce broad client base.

You will be involved in the defining and creating performance scripts, executing the performance testing and then analysing, in detail, the results, and identifying problematic features and making recommendations to the wider team to resolve these.

This is a key role, responsible for the delivery and support of many high-profile eCommerce systems. The challenges you will face as a Performance Engineer include different architectures, application components and their interaction.


Talented, enthusiastic, focused, eye for detail, professional. Keen to learn and to challenge for smarter ways of doing things; a team player proud of their work who wants to share it. You like working in a fast-paced environment and are ready to inspire outstanding online shopper experiences for consumers and brands, no matter what product, service, sector, device or channel!

You will have a customer-first mindset, with the maturity and initiative to do what it takes keep our clients happy, including some working at client locations. When our clients win – we win!

As a Performance Engineer will need you to be really great at:

  • Knowledge & experience in performance testing of eCommerce applications.
  • Experience Performance test load generation tools, including JMeter.
  • Previous knowledge of working within an Agile environment.
  • Knowledge of Application Monitoring Tools such as DynaTrace, AppDynamics or NewRelic.
  • Hands on experience performance problem determination and root cause analysis.
  • Very good knowledge and proven experience working on Linux and cloud (AWS or Google) environments.
  • Experience tuning highly scalable applications, including reviewing configurations around cache sizes and heap sizes.
  • Experience interpreting and analysing real user monitoring statistics (RUM).
  • Expertise in front end page load analysis and profiling and optimisation using Webpagetest, Pagespeed, Speedcurve, or other tools.
  • Experienced in load forecasting for peak times and assessing likely resilience of systems as well as making recommendations on how to improve based on business needs.
  • Experienced in pinpointing and resolving real time performance issues in live systems.
  • Very good backend testing skills – conversant in databases (DB2, Oracle), SQL knowledge, use of DB Visualiser or other tools.
  • Hands on experience analysing log files to make performance enhancement recommendations.
  • Competent in logging identified issues and tracking them through to resolution.
  • Highly organized and owns their own deadlines, willing to go above and beyond what was promised to deliver quality service.
  • Excellent interpersonal skills and a proven ability to collaborate with all stakeholders.
  • Wanting to learn and grow, the role will be constantly changing allowing exposure to different technologies and tools.

If you know some of this even better!

  • eCommerce platform expertise and experience performance testing and analysis on IBM WebSphere Commerce, SAP Hybris or Magento and SOLR, Fredhopper or other search services.
  • Experience setting up performance monitoring using Grafana, APMS or other tooling.
  • Experience implementing performance testing in a continuous delivery environment.
  • Scripting (perl, awk, python etc.)
  • Exposure to Java or PHP
  • Experience with Apache Tomcat, JBoss
  • Experience with other load generation tools eg LoadRunner, CloudTest or NeoLoad

Wunderman Thompson Commerce is a new global eCommerce consultancy that applies strategy, technical know-how and outstanding design to make a big impact through eCommerce.

How? By creating outstanding websites and inspired shopper journeys. It’s why we work with some of the most exciting brands around such as GAME, Halfords, Sainsbury’s, Selfridges, Specialized and Ted Baker.

Tell me more! We’re an inclusive group of more than 1350 thinkers and doers from WPP’s leading commerce agencies: Salmon, POSSIBLE Commerce and Gorilla Group alongside two Amazon specialists - all under the world-renowned Wunderman brand. Our reputation is based on having the best in the business – people who are inspired yet straight-talking, and who really want to understand not just our clients but their customers. We are passionate about innovation in everything we do, and proud of what our people achieve, empowering and respecting every one of them.

Together, we keep our clients and their customers inspired and ahead through digital, future-ready sites, solutions and services. When our clients win – we win.

With new, state-of-the-art offices in Watford, and two other cool agency offices in Central London, we’ve got 20 locations mapped across Europe, North America and Asia.

As our business grows internationally, we’re seeking new people who share our values and work ethic. We especially want to encourage more women to join, and take a key role in shaping some of the best eCommerce sites and experiences in the world.

Remote Level

Ad-hoc Remote  

Target Regions

Home Counties,   London,   South East