Systems Performance Tester - Virtualization specialist

Introduction
The IBM mainframe (Z Systems) is responsible for most credit card transactions and is used by the many of the top insurers banks retailers and airlines.
IBM z/VM® is an operating system with highly secure and scalable hypervisor and virtualization technology designed to run Linux® z/OS® z/VSE® and z/TPF virtual machines as well as Red Hat® OpenShift® on IBM zSystems™ and IBM LinuxONE servers. z/VM provides a highly secure and scalable environment for efficiently running critical Linux applications with support for more Linux virtual servers than any other platform in a single footprint.
The z/VM team is a worldwide team primarily located in Poughkeepsie NY with expansion plans in Bangalore India. All phases of the software life cycle are performed within this team including the design development test performance as well as supporting the product in the field with customers. Agile methodologies are used throughout the life cycle.
We are looking for qualified software engineer candidates to be part of our IBM Z Systems team to help us take z/VM virtualization to the next level on the mainframe.

Your Role and Responsibilities

• Execute benchmarks to identify hotspots/bottlenecks in the z/VM implementation
• Evaluate the performance across the IBM zSystems and IBM LinuxONE servers
• Suggest and implement platform specific changes/improvements using prototypes as proofpoints
• Contribute to performance study by executing benchmarks and collecting various performance measurements and metrics
• Collaborate with relevant stakeholders to share/borrow best practices in the performance arena

Required Technical and Professional Expertise

• Required Technical and Professional Expertise with relevant experience of 3-8 years
• Working knowledge of Operating System Linux/Unix
• Thorough understanding of hardware & systems architecture is a must
• Strong understanding of Virtualization (working experience either with z/VM PowerVM KVM Xen VMware etc.)
• Hands-on experience in Systems software & Performance testing
• Knowledge of whole-stack performance analysis and problem determination quick prototyping and iterative experimentation
• Strong team player with good communication and interpersonal skills
• Proven ability to work effectively in a global team environment
• Proven command over the English language both written and verbal

Preferred Technical and Professional Expertise

• Kernel concepts and Internals (Process Management Memory Management Virtualization Scheduling Networking Security etc.)
• Proficient programming skills for automation and usage of frameworks using scripting using shell python perl etc. is desirable
• Experience working with debuggers and demonstrated problem-solving skills especially code optimization
• Familiar with Software Performance tools and benchmarks
• Prior experience on performance engineering and tuning/optimization is desirable
• Flexible to pick up and ramp up quickly on different aspects of Linux performance and adjoining areas depending on dynamic business priorities
• Working knowledge of transactional workloads like DayTrader Oracle MongoDb Postgress/SQL etc. is preferred
• Familiarity of Cloud associated workloads especially leveraging the RedHat OpenShift platform