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Senior Software Engineer - Performance

Nenagh, Ireland | Fiserv

  • Industry:
    Information Technologies
  • Position Type:
  • Functions:
    IT / Information Technology
  • Experience:
    5-7 years
Job Description:
53 people have viewed this job

Every day, Clover devices handle the core credit card and point-of-sale processing for hundreds of thousands of merchants. Behind the scenes, we operate a cloud platform providing processing, storage and collaboration for merchants, application developers, service providers and our merchants' customers.Our devices and platform form the backbone of millions of payment interactions between merchants and their customers daily.We are looking for self starters with a passion for technology who want to help us impact millions of merchant’s lives one transaction at a time.

Daily Responsibilities:

Define, develop and perform performance/scalability benchmarks on Clover Platform and Clover micro-services deployed to the Cloud

You will be a key member of our Cloud Platform team driving the quality of our products and services to the next level.

You will work within our agile software development process and have an important impact on the services being built by the Clover Platform& Product teams.

Efficiently working with various profiling tools to identify performance and concurrency bottleneck, propose and implement optimizations to improve the clover product ecosystem consisting of server/web and android devices

Implement and improve sizing and capacity calculators for key Clover applications on the cloud


6+ years of experience in Performance Engineering and Benchmarking

Skilled in both the art and science of benchmark creation and measurement and modeling of system behavior under load

Hands-on experience creating load and performance scenarios driven by user behaviors and patterns

Ability to design and script out complex performance tests using tools such as Gatling

Ability to find root cause of performance bottlenecks with profiling tools, pstack, JProfiler , YourKit (Java)

Passionate to optimize the performance bottlenecks and improve the product

Experience in tackling problems of load, scale, and optimizations of complex large-scale deployments

Experience in SaaS, Microservice , CloudNative software companies and projects

Expert in scripting languages (Python) and compiled languages Java , C/C++ * Expert in distributed computing system and stack Comfortable with Linux, Docker, GCP/AWS, GIT, Artifactory in terms of both tools and systems administration

Nice to Haves:

Advanced experience with a scripting language such as JavaScript/Python/Ruby in a Linux environment.

Ability to extend performance-testing frameworks. Preferably a python framework

Experience with the agile methodology for software development teams.

Knowledge of continuous integration and deployment and automation tools (e.g. Jenkins).

Experience with microservices, preferably Spring Boot

Experience with enterprise software capacity planning a big plus


Bachelor’s degree or higher in Computer Science, or equivalent

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