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Mastercard · 6 days ago

Senior Software Engineer

O'Fallon, MO

Full-time

Hybrid

Mid, Senior Level

$115K/yr - $184K/yr

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. This role involves joining Mastercard’s Transaction Switching program to improve authorization transaction times by working closely with feature teams and performance engineering. The position focuses on enhancing software performance, identifying risks, and automating performance testing.

FinanceFinancial ServicesInformation TechnologyPayments

Growth Opportunities

H1B Sponsor Likely

Responsibilities

Work closely with feature teams to identify risks and anticipate problems to ensure that each release does not negatively impact performance

Dig into the code to determine performance bottlenecks and make the improvement

Design, configure, automate, and execute performance tests

Improve the performance environment with your own code, automation, and onboarding of external tools (i.e. Dynatrace and Splunk)

Work collaboratively and effectively in a fast-paced environment

Qualification

C/C++ programmingLinux environmentPerformance engineeringAutomation scriptingComputer architectureShell scriptingTCLPerlPython

Required

Proven experience developing backend applications in a Linux environment with C and/or C++ programming language(s)

Deep knowledge and experience of computer architecture with throughput, latency, memory and CPU utilization for performance engineering to test, debug and troubleshoot performance issues

Clear experience with automation to create scripts for manual tasks (I.e., shell scripting, TCL, Perl, Python)

Benefits

Insurance (including medical, prescription drug, dental, vision, disability, life insurance)

Flexible spending account and health savings account

Paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave)

80 hours of Paid Sick and Safe Time

25 days of vacation time and 5 personal days, pro-rated based on date of hire

10 annual paid U.S. observed holidays

401k with a best-in-class company match

Deferred compensation for eligible roles

Fitness reimbursement or on-site fitness facilities

Eligibility for tuition reimbursement

Company

Mastercard

Glassdoor4.2

Mastercard is a financial network that processes payments between banks and cardholders.

Founded in 1966

Purchase, New York, USA

10001+ employees

http://www.mastercard.com

H1B Sponsorship

Mastercard has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)

Distribution of Different Job Fields Receiving Sponsorship

Represents job field similar to this job

Trends of Total Sponsorships

2025 (540)

2024 (319)