Site Reliability Engineer / Performance Engineer at Visa

About Us
Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid.

At Visa, you'll have the opportunity to create impact at scale — tackling meaningful challenges, growing your skills and seeing your contributions impact lives around the world.

Join Visa and do work that matters – to you, to your community, and to the world. Progress starts with you.

Job Description

Technical

• Investigate and analyse issues raised through Engineering Triage, using system‑level data, metrics, logs, and customer information.

• Interpret graphs, measurements, and test results to identify patterns, anomalies, or bottlenecks.

• Set up, run, and compare POCs in controlled environments to validate hypotheses and guide technical decisions.

• Apply strong Linux and shell‑scripting knowledge to gather data, run tests, and automate routine analysis.

• Use JVM knowledge to understand system behaviour, resource utilisation, and configuration impacts.

• Tune and enhance the current system setup by recommending configuration, architectural, or operational adjustments.

• Research complex technical problems independently and propose practical, evidence‑based solutions.

• Document findings clearly and communicate technical explanations to developers, support engineers, and stakeholders.

Impact

• Drive clarity on ambiguous or customer‑reported system issues by producing high‑quality investigations.

• Provide insights that directly influence system stability, performance, and customer satisfaction.

• Guide Support and Engineering teams by asking the right questions and helping interpret data.

• Deliver POCs that help the organisation evaluate new tools, architectures, or solutions with confidence.

• Influence technical direction by identifying structural or configuration improvements.

Behaviour

• Demonstrate a proactive, self‑starting attitude—comfortable exploring issues independently before seeking help.

• Embrace a scientific mindset: formulate hypotheses, test them, evaluate results objectively.

• Show curiosity, enthusiasm, and a genuine interest in learning more about systems, tuning, and diagnostics.

• Collaborate effectively across teams and communicate findings clearly and constructively.

• Seek and provide timely, actionable feedback.

• Help raise the overall standard of system analysis, investigation quality, and diagnostic understanding across the team.

• Model a calm, methodical approach to complex or unclear problems.

Qualifications

Basic Qualifications

• Strong understanding of Linux internals, shell scripting, and system‑level diagnostics.

• Foundational JVM knowledge (memory, threads, GC basics, configuration impacts).

• Experience interpreting logs, metrics, dashboards, and system graphs.

• Ability to understand and interpret test results, workload outputs, and benchmark data.

• Proven ability to troubleshoot complex technical problems by researching, analysing, and synthesising information.

• Demonstrated use of a home lab or personal systems projects (VMs, clusters, network setups, custom builds).

• Strong analytical and critical‑thinking skills with high attention to detail.

• Ability to manage workload independently and drive investigations to completion.

• Familiarity with common tooling for monitoring, metrics, or system insights.
  

Preferred Qualifications

• Database knowledge (relational or NoSQL).

• Deeper JDK/JVM tuning or diagnostic experience.

• Basic Kubernetes setup or cluster experimentation experience.

• Understanding of networking fundamentals.

• Experience with open‑source tools used for diagnostics, observability, or system performance.

• Basic programming ability (any language) to support automation or small tooling improvements.

• Exposure to distributed systems concepts or cloud environments

As a System Performance Engineer, you also need the following qualities:

• Attention to detail, excellence and quality.

• A focus on personal achievement and responsibility.

• Passion to learn new skills and technologies.

• Ability to share knowledge

• Enthusiasm and an open mindset.

• Can-do attitude.

• A passion to work for one of the fastest growing fraud prevention technologies in the world

Visa is an EEO Employer

Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.