Senior Performance Engineer at KAR Global

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About This Position:

We are seeking a Senior Performance Engineer to join our team where you will be able to manage multiple complex, large-scale projects, serving as the point of contact for performance testing initiatives. You will assess the performance needs of an application and develop a performance test strategy to evaluate application/infrastructure performance, while working with scrum teams, architecture, and infrastructure teams. You will be responsible for conducting in-depth analysis and troubleshooting to identify root cause of performance-related issues and performance improvement opportunities, providing technical leadership, assisting the development team in identifying coding improvements, and coaching/mentoring performance test engineers and scrum teams on performance testing best practices.

As our Senior Performance Engineer, you must be able to communicate risks, employ appropriate risk mitigation strategies and tactics, and effectively communicate and engage with stakeholders at all levels. If you're fired up about software performance, automating everything, and working with great teams, then this is the job for you!


What You Will Be Doing:

  • Design, development, and execution of performance testing scripts for enterprise and custom applications in a pre-implementation stage.

  • Provide in-depth analysis and recommendations for performance improvements prior to implementing changes in the software production environment and/or application.

  • Anticipate and resolve key technical application and infrastructure problems, bottlenecks, failures, and potential points of failure that impact application performance and stability.

  • Provide diagnostic and root cause information to engineering team for quick defect remediation.

  • Ability to identify potential performance limitation of chosen technology by reviewing architecture.

  • Provide active technical leadership throughout the entire development process by reviewing performance test cases and scripts and communicating regularly to both engineering team and stakeholders.

  • Subject Matter Expert (SME) in performance testing disciplines and best practices with an in-depth understanding of different performance testing types and testing strategies, including Reliability, Scalability, and Performance.

  • Promote continuous process improvement.

  • Collaborate and communicate effectively with scrum teams, architects, infrastructure teams, business stakeholders, and leadership in both a team environment and independently.

  • Develop, gather, and publish metrics and trending.

  • Develop performance test plan including scope, timeframe, resources, inception criteria and sign off criteria for a given performance engineering initiative.

  • Lead peer reviews of performance test strategy and scripting.

  • Support the establishment and maintenance of a performance test case repository.

  • Become a Subject Matter Expert (SME) by developing deep application, architecture, infrastructure, and business knowledge.

  • Mentor and coach junior staff by conducting team-based training in performance testing or business-related topics.


What You Need to Be Successful:

  • Advanced knowledge and hands-on experience with performance testing and metrics gathering tools, such as JMeter, BlazeMeter, Google Lighthouse, or similar tools.

  • Hands-on experience with monitoring tools, such as App Dynamics, Splunk, or similar tools.

  • Demonstrate advanced analysis and problem-solving abilities.

  • Solid understanding of Java technology such JVM, GC etc.

  • Solid understanding of both backend and front-end performance enhancements.

  • Familiar with HTTP/TCP IP protocol in web browsers and other devices.

  • Familiar with Linux environment configuration and administration.

  • Working knowledge of Oracle DB.

  • Strong understanding of different performance testing types and strategies.

  • Experience writing and executing SQL scripts for the purpose of locating, creating, or manipulating test data.

  • Proven ability to write and execute detailed performance test scripts.

  • Solid understanding of CI tools such as Jenkins and ADO.

  • Experience with automation of REST API Web Services.

  • Understanding of SAFe Agile methodologies.

  • Organization, time management skills, and attention to detail are critical.

  • Demonstrate high initiative, self-motivation, self-discipline, strong sense of urgency, and dependability for the team.

  • Excellent oral and written communications skills, including the ability to communicate and collaborate effectively with stakeholders.

  • Thrive in a fast-paced agile environment.

  • Knowledge of AWS Lambda platform or any cloud-based environment is a plus.

  • Strives for continuous improvement to enhance technical skills through research and experimentation.

  • Dedication to enhance knowledge and skills through research and experimentation, in-house and external classes. 


Bonus Points:

  • Industry recognized certification in performance testing practices, performance testing tools, or SDLC a plus.

  • Experience in developing and executing automated test cases preferred but not required.

  • Knowledge of auto remarketing industry, auto insurance industry, or auction industry.

  • Development programming experience is a plus.



  • Bachelor's Degree or equivalent work experience.

  • 6 or more years’ prior experience in Information Technology.

  • 5 or more years’ experience in a performance testing role.


We want you to be well and thrive. Our benefits package includes:

  • Competitive compensation

  • Insurance coverage that includes medical, dental, vision and life insurance

  • Flexible spending account

  • Wellness program

  • 401(k) with employer match

  • Employee stock purchase program

  • Paid holidays and generous paid time off

  • Paid parental leave

  • Learning and development resources


Next Steps:  

If this job describes you, please apply! We thank all interested candidates; however, only those selected for an interview will be contacted. 

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Technology we use

  • Engineering
  • Product
  • Sales & Marketing
    • JavaLanguages
    • JavascriptLanguages
    • PythonLanguages
    • RLanguages
    • SqlLanguages
    • ReactLibraries
    • DojoLibraries
    • FlaskFrameworks
    • Node.jsFrameworks
    • SparkFrameworks
    • SpringFrameworks
    • TensorFlowFrameworks
    • TorchFrameworks
    • PostgreSQLDatabases
    • RedisDatabases
    • Google AnalyticsAnalytics
    • MixpanelAnalytics
    • OptimizelyAnalytics
    • ConfluenceManagement
    • JIRAManagement
    • SalesforceCRM


Our Chicago office is located in River West on the North Branch of the Chicago River. We have free shuttles to major train stations and CTA lines.

An Insider's view of KAR Global

What's something quirky about your company?

Our culture is more like a family than colleagues. One of my favorite aspects about this office is our Parents-designated Slack channel—an online team collaboration site. It is a great reminder we aren’t just employees, but we can be moms and dads at work, shamelessly sharing fun stories about our personal lives.


Senior Product Manager

What's the biggest problem your team is solving?

KAR Global’s DevOps teams are always solving unique problems, but tackling complexity is the real challenge. We’ve found that meaningful solutions come when we don’t focus on fighting fires reactively and instead work collaboratively on building proactive frameworks and implementing forward-thinking processes.


Jr. DevOps Manager

What does your typical day look like?

We start the day with a 15-minute huddle to talk about progress from the day before, the day’s plan and barriers to success that need to be addressed. This gives us a clear understanding of our priorities for the day. Our teams are dynamic, so every member of our project team works together each day to discuss design approaches and share ideas.


Lead Backend Engineer

What are KAR Global Perks + Benefits

Volunteer in local community
KAR Auction Services gives every full-time employee a day with pay to volunteer with your favorite cause.
Friends outside of work
Eat lunch together
Intracompany committees
We have both a local culture and company-wide wellness committee.
Daily sync
Open door policy
Team owned deliverables
Group brainstorming sessions
Open office floor plan
Dedicated Diversity/Inclusion Staff
Someone's primary function is managing the company’s diversity and inclusion initiatives
Diversity Employee Resource Groups
Hiring Practices that Promote Diversity
Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Health Savings Account (HSA) also available for employees enrolled in KAR medical plan. Both individual and dependent FSA's available to everyone.
Disability Insurance
Dental Benefits
Vision Benefits
Health Insurance Benefits
The annual employer contribution to HSAs is $750 for employee only coverage and $1,500 for family coverage. Contributions are prorated based on hire date.
Life Insurance
Wellness Programs
Onsite Gym
Team workouts
Offering free weekly virtual workouts courtesy of River North Gym that are also available on demand after they take place.
Mental Health Benefits
Retirement & Stock Options Benefits
401(K) Matching
Employee Stock Purchase Plan
Child Care & Parental Leave Benefits
Generous Parental Leave
We provide up to 4 weeks of parental leave pay (full wage replacement) for employees within 6 months of the birth, adoption, or placement of a foster child.
Flexible Work Schedule
Remote Work Program
Family Medical Leave
Vacation & Time Off Benefits
Generous PTO
Paid Volunteer Time
Paid Holidays
Paid Sick Days
Perks & Discounts
Beer on Tap
Casual Dress
Commuter Benefits
Company Outings
Game Room
Stocked Kitchen
Some Meals Provided
Happy Hours
Fitness Subsidies
We partner with River North Gym to provide employees complimentary physical fitness options (virtual and onsite), as well as several sessions of 1:1 training with a health coach.
Professional Development Benefits
Job Training & Conferences
Tuition Reimbursement
Lunch and learns
Promote from within
Continuing Education stipend
Time allotted for learning
Customized development tracks
Paid industry certifications
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