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Mastercard

Senior Software Engineer

Mastercard

Published 15 Apr 2026
O'Fallon, MO, USA
115K - 184K USD Annual
Part Time
Full Time

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Role Highlights

Languages used

C++
TCL
Perl
Python

Key skills

Prompt Engineering
Information Security
Shell Scripting
Computer Architecture
Data
Switching
CPU
Agile
Automation
Backend

Tools, Libraries and Frameworks

Linux
Splunk

Description

The role involves joining the Transaction Switching program to improve authorization response times for global transactions. The engineer will partner with development teams to performance test and tune each software release. Responsibilities include identifying risks, anticipating problems, and analyzing code to resolve performance bottlenecks. The position requires designing, configuring, and executing performance tests while automating manual tasks. Additionally, the role involves improving the performance environment through code development and the integration of external tools.

Required Qualifications and Skills

The role requires proven experience in developing backend applications within a Linux environment using C or C++ programming languages. Candidates must possess deep knowledge of computer architecture, specifically regarding throughput, latency, memory, and CPU utilization for performance engineering. Proficiency in automation through scripting languages such as shell, TCL, Perl, or Python is necessary. Experience working in an Agile environment is also required.

Disclaimer

Disclaimer: Job and company description information and some of the data fields may have been generated via GPT-4 summarisation and could contain inaccuracies. The full external job listing link should always be relied on for authoritative information.

About the company

Mastercard

Size

38185

HQ

Purchase, US

Description

MasterCard is framed as a technology company in the global payments business, emphasizing its role in connecting various stakeholders worldwide and enabling the use of secure and convenient electronic forms of payment. It describes its mission as working to connect and power an inclusive digital economy that benefits everyone everywhere by ensuring transactions are safe, simple, smart, and accessible. The company culture is driven by a decency quotient (DQ), cultivating an inclusive environment that values individual strengths, views, and experiences. It leverages secure data, networks, partnerships, and a passion for innovation to support various entities, including individuals, financial institutions, governments, and businesses, in realizing their potential.

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