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Senior Site Reliability Engineer (SRE)

Fiserv
Berkeley Heights, United Statesfull_timeVerifiedPosted 9 Aug 2025
💰 $216,000/yr($128,000/yr$216,000/yr)

About the role

Calling all innovators - find your future at Fiserv.

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Senior Site Reliability Engineer (SRE)

About your role:

We are seeking a highly skilled and experienced Senior Performance & Site Reliability Engineer to join our team and take a leadership role in ensuring the performance, reliability, and scalability of our production systems. This role is ideal for a seasoned professional who thrives in dynamic environments, possesses deep technical expertise across multiple layers of the stack, and is passionate about delivering exceptional client experiences through robust and high-performing systems.
 

This hybrid position combines the disciplines of performance engineering and site reliability engineering, with a strong focus on production environments. The successful candidate will proactively identify and resolve performance bottlenecks, recommend and implement system optimizations, and lead incident response efforts with speed and precision. Additionally, this role will be instrumental in evaluating infrastructure readiness during client onboarding and forecasting capacity needs to support future growth.

What you’ll do:
 

Production Performance Optimization

  • Conduct comprehensive performance assessments of production systems, identifying inefficiencies across application code, JVM configurations, database queries, and infrastructure components
  • SQL query optimization and strategic indexing to enhance database responsiveness; JVM memory tuning to reduce garbage collection overhead & improve application stability and application-level enhancements to support scalability & reduce latency
  • Collaborate with development, QA, and infrastructure teams to ensure performance improvements are effectively integrated into deployment pipelines and release cycles


Monitoring, Observability & Diagnostics

  • Utilize a robust suite of observability and diagnostic tools to monitor system health, detect anomalies, and perform deep root cause analysis: Splunk, Dynatrace, Extrahop, Foglight, and Wireshark
  • Develop and maintain advanced dashboards, alerts, and automated reporting mechanisms to ensure proactive detection and resolution of performance issues.


Client Onboarding & Infrastructure Planning

  • Participate in client onboarding processes by reviewing anticipated usage patterns and evaluating the impact on existing infrastructure; perform capacity planning and forecasting to ensure infrastructure readiness and scalability in alignment with client growth and business objectives
  • Collaborate with infrastructure and operations teams to provision new hardware, optimize resource allocation, and maintain high availability and performance standards
     

Incident Response & Reliability Engineering

  • Act as a senior technical lead during production incidents, driving rapid triage, root cause identification, and resolution efforts; lead post-incident analysis to identify systemic issues and implement long-term solutions that enhance system resilience and prevent recurrence

Experience you’ll need to have:

  • 7+ years of hands-on experience in performance engineering, site reliability engineering, or a closely related technical discipline
  • Advanced proficiency in SQL and database performance tuning (e.g., Oracle, PostgreSQL, MySQL)
  • Deep understanding of JVM internals, memory management, and garbage collection strategies
  • Strong programming skills in Java and scripting languages such as Python or Bash
  • Familiarity with cloud platforms (AWS, Azure, GCP) and container orchestration technologies (e.g., Kubernetes, Docker)
  • Demonstrated experience with Splunk, Dynatrace, Extrahop, Foglight, and Wireshark in production environments
  • Exceptional analytical, problem-solving, communication and collaboration skills, with the ability to work effectively across cross-functional teams
  • Bachelor’s degree in computer science, Engineering, or related field

Experience that would be great to have:

  • Experience in infrastructure capacity planning and forecasting
  • Background in incident management, postmortem analysis, and c

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Company

Fiserv

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