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Billing Engineer
Tailscale
Remote, United States
We’re seeking a highly skilled and motivated Software Engineer to join our growing team. You will work as part of the engineering team to:
Added just now
Billing Engineer
Tailscale
Remote, United States
We’re seeking a highly skilled and motivated Software Engineer to join our growing team. You will work as part of the engineering team to:
Added 1 min ago
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Subsea Acoustics Engineer
Ulysses Inc.
San Francisco, CA
- $145,000 to $190,000 USD / year
This is a hands-on, full-stack role spanning physics, signal processing, electronics, embedded software, mechanical integration, and production test. You will be part of the Ulysses…
Added 1 min ago
UI
Mechanical Engineer
Ulysses Inc.
San Francisco, CA
- $130,000 to $180,000 USD / year
…team is lean, hands-on, and fast - we prototype in the shop, test on the water, and ship. If you want to work at the frontier, there's no frontier bigger than the…
Added 1 min ago
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Manufacturing Design Engineer
Ulysses Inc.
San Francisco, CA
- $130,000 to $180,000 USD / year
We're looking for a Manufacturing Engineer to build the tooling and test infrastructure that makes that possible - and "tooling" undersells it. A good part of what you build will be…
Added 1 min ago
UI
Embedded Systems Engineer
Ulysses Inc.
San Francisco, CA
- $140,000 to $180,000 USD / year
We're looking for an Embedded Systems Engineer to own the firmware, electronics integration, and low-level hardware that make our underwater robotic systems work. You'll write the embedded…
Added 1 min ago
UI
Electronics Engineer
Ulysses Inc.
San Francisco, CA
- $135,000 to $180,000 USD / year
We’re hiring an Electrical Engineer to join our already exceptional EE team to play a critical part in designing, prototyping, and bringing to production the embedded electronics that power…
Added 5 mins ago
ET
Test Automation Engineer (Remote)
EdgeQ Technologies Private Limited
Remote, United States
- $80,000 to $150,000 USD / year
We are seeking a skilled Test Automation Engineer with hands-on experience in Selenium, Cypress, Playwright, and CI/CD pipelines. The ideal candidate will develop and maintain automated…
Added 5 mins ago
ET
QA Engineer
EdgeQ Technologies Private Limited
Remote, United States
- $85,000 to $125,000 USD / year
We are seeking a detail-oriented and experienced QA Engineer to join our technology team. The ideal candidate will be responsible for ensuring the quality, reliability, and performance of…
Added 5 mins ago
ET
Junior Data Engineer (Remote)
EdgeQ Technologies Private Limited
Remote, United States
- $75,000 to $115,000 USD / year
We are seeking a motivated and detail-oriented Junior Data Engineer to join our data engineering team. The ideal candidate will have a foundational understanding of Python, SQL, ETL…
Added 5 mins ago
ET
Firmware Engineer (US)
EdgeQ Technologies Private Limited
Dallas, TX · New York City, NY · Seattle, WA · San Francisco, CA
- $75,000 to $120,000 USD / year
We are seeking a motivated Firmware Engineer to develop, test, debug, and maintain firmware for embedded devices and connected hardware products. The ideal candidate will have a strong…
Added 5 mins ago
ET
Embedded Software Engineer (US)
EdgeQ Technologies Private Limited
San Jose, CA · Seattle, WA · Washington, DC
- $85,000 to $135,000 USD / year
We are seeking a skilled Embedded Software Engineer to design, develop, test, and maintain software for embedded systems and connected devices. The ideal candidate will have experience in…
Added 5 mins ago
ET
Desktop Applications Engineer
EdgeQ Technologies Private Limited
Remote, United States
- $85,000 to $125,000 USD / year
We are seeking a skilled Desktop Applications Engineer to design, develop, test, and maintain high-quality desktop software applications. The ideal candidate will have hands-on experience…
Added 5 mins ago
ET
Data Engineer
EdgeQ Technologies Private Limited
New York City, NY · Seattle, WA · Austin, TX
- $85,000 to $160,000 USD / year
We are seeking a skilled Data Engineer with 2–8 years of experience to design, develop, and maintain scalable data pipelines and data infrastructure. The ideal candidate will have strong…
Added 5 mins ago
ET
CI/CD Engineer
EdgeQ Technologies Private Limited
Remote, United States
- $105,000 to $175,000 USD / year
We are seeking an experienced CI/CD Engineer to design, implement, maintain, and optimize continuous integration and continuous delivery pipelines. The ideal candidate will have strong…
Added 5 mins ago
ET
API Test Engineer (Remote)
EdgeQ Technologies Private Limited
Remote, United States
- $75,000 to $140,000 USD / year
We are seeking a detail-oriented API Test Engineer with experience in REST API testing, Postman, SQL, and test automation. The ideal candidate will ensure API reliability, functionality,…
Added 5 mins ago
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AI/ML Engineer (Remote)
EdgeQ Technologies Private Limited
Remote, United States
- $85,000 to $130,000 USD / year
We are seeking a motivated and technically skilled AI/ML Engineer to join our engineering team. The ideal candidate will have a strong foundation in Python programming, machine learning…
Added 16 mins ago
Principal Software Engineer, Onsite
RTX
United States
…individual will work collaboratively in an agile environment on the software team. The individual will work with C code in a multithreaded environment or Java application code and support…
Added 16 mins ago
Display Electrical Engineer 1 (Onsite)
RTX
United States
…release of complex technical documentation; and supporting integration and environmental qualification testing of new…
Added 16 mins ago
Infrastructure Engineer I (Onsite)
RTX
United States
Typical job functions for the Infrastructure Engineer I include participation on collaborative, cross-disciplined integrated product teams, often employing agile software development…
Added 20 mins ago
Software Test Automation Engineer
Booz Allen Hamilton_United States
Alexandria, VA
Software Test Automation EngineerThe Opportunity:
Added 23 mins ago
Engineer II, Software Engineering
Red River
Remote, United States
The Test Engineering Lead works closely with Systems Engineering, Software Development, Hardware Engineering, Production, Quality Assurance, and Program Management to coordinate testing…
Added 30 mins ago
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Storage Engineer
TEKsystems
San Diego, CA
- $65 to $80 USD / hour
DescriptionClient is seeking a hands-on Storage Engineer to design, integrate, validate, and support enterprise storage solutions for Data platforms. The role spans storage hardware,…
Added 37 mins ago
Systems Engineer/MBSE
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Systems Engineer/MBSE to support an Army Aviation Capability Program Executive (CPE). This position is…
Added 37 mins ago
Software Test Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, seeks candidates for a Software Test Engineer to support the Army Aviation Capability Program Executive (CPE). This position is based in…

US: Mastercard Technologies, LLC

Software Engineer II

O'Fallon, MO, United States

Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD

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Job details

Pay: Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD
Posting language: English
Posted: Nov 4, 2026

Original job description

Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

Title and Summary

Software Engineer II

About the Role

The Mastercard Remote Payment Presentment Service (RPPS) Program is engaged in developing innovative solutions to keep Mastercard positioned as a leader in delivering value-added services and seamless customer onboarding. We work collaboratively with our product partners and other technical teams to continuously improve and enhance our existing products and drive new products to the global marketplace.

We are currently hiring a Software Engineer II, and the successful candidate will contribute to the design, development, testing, deployment, and support of enterprise applications while applying software engineering principles to deliver scalable, secure, resilient, and maintainable solutions. This role will collaborate closely with cross-functional teams and contribute to continuous improvement initiatives that enhance application quality, reliability, and operational excellence.

Role

Participate in the gathering and analysis of business requirements and translate them into scalable, maintainable, and secure software solutions.
Participate in application design discussions and contribute to software architecture, design patterns, component interactions, and technology standards under the guidance of senior engineers and technical leads.
Develop solutions that align with Mastercard Enterprise Architecture standards while leveraging enterprise services, frameworks, and reusable platforms.
Contribute to ensuring product development meets Mastercard's business, scalability, performance, security, and reliability requirements.
Follow Mastercard development methodologies, engineering standards, and documentation practices when designing and building software solutions.
Participate in code reviews to improve code quality, maintainability, security, consistency, and adherence to software engineering best practices.
Collaborate with team members, share knowledge, and seek guidance from senior engineers when addressing highly complex technical challenges.
Design, develop, maintain, and support high-quality software solutions using modern software engineering principles and practices.
Design, develop, and maintain unit, functional, integration, and automated tests to validate application functionality, system interactions, quality, and reliability.
Support continuous integration and continuous testing practices to improve software quality and release confidence.
Develop and maintain software solutions that support high availability, resiliency, operational readiness, and reliability objectives.
Respond to operational and business concerns related to applications, projects, and platform enhancements to ensure consistent delivery of quality services.
Investigate and resolve production, application, integration, and infrastructure issues using structured troubleshooting, root cause analysis, and corrective actions, escalating highly complex issues when appropriate.
Support compliance with required certifications and regulatory requirements, including PCI, GLBA, Safe Harbor, and other applicable standards.
Apply secure coding practices, security-by-design principles, and vulnerability prevention techniques throughout the software development lifecycle.
Identify and remediate application security vulnerabilities while ensuring alignment with Mastercard security standards and industry best practices.
Contribute to application performance optimization through monitoring, analysis, tuning, and scalability improvements across applications, APIs, databases, and cloud environments.
Apply data structures, algorithms, and software engineering principles to develop efficient, scalable, and maintainable software solutions.
Develop, test, deploy, monitor, and support cloud-based applications and services using AWS and cloud-native technologies while following established architecture patterns and engineering standards.
Design and build solutions with operational readiness in mind, incorporating observability, logging, monitoring, alerting, supportability, reliability, and maintainability best practices.
Contribute to the continuous improvement and expansion of the platform by helping ensure that solutions remain resilient, secure, scalable, highly available, and operationally efficient.
Collaborate with product owners, business partners, and engineering teams to understand requirements and provide technical input supporting product and platform objectives.

All About You

Strong analytical, troubleshooting, and problem-solving abilities, with the ability to quickly adapt to new technologies, methodologies, and systems.
High-energy, detail-oriented, proactive, and able to function effectively in a fast-paced environment with a high degree of initiative and accountability.
Strong interpersonal and relationship-building skills with a proven ability to collaborate effectively across teams.
Excellent communication skills with the ability to interact across organizational levels and partner effectively with technical and non-technical stakeholders.
Strong understanding of data structures, algorithms, object-oriented design principles, and scalable application development techniques.
Experience developing and enhancing scalable, secure, maintainable, and high-performing enterprise software solutions.
Experience participating in code reviews and applying engineering best practices to improve software quality, maintainability, and security.
Experience developing unit, functional, integration, and automated testing solutions within enterprise applications.
Experience analyzing application performance, identifying bottlenecks, and implementing optimization improvements across applications, databases, and cloud environments.
Experience applying secure coding practices, application security principles, vulnerability remediation techniques, and OWASP-based security standards.
Proficient working with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and relational and non-relational database technologies including Oracle, SQL Server, MySQL, PostgreSQL, NoSQL, MongoDB, or comparable technologies.
Demonstrated troubleshooting and root cause analysis skills supporting business-critical applications in production environments.
Experience in the following is highly preferred:
Web Services (SOAP, RESTful APIs)
Servers (WebSphere, JBoss, Tomcat)
HTML, JavaScript, jQuery
UNIX (Shell, AWK scripting)
XML/XSLT
CSS
C#
React or Angular
IDEs (Microsoft Visual Studio, RAD, Eclipse)
Experience working within Agile and Waterfall delivery methodologies.
Experience developing and supporting cloud-native applications utilizing AWS cloud services.
Understanding observability, monitoring, operational readiness, and reliability engineering concepts.
Bachelor's degree in information systems, Information Technology, Computer Science, Engineering, or equivalent practical experience is preferred.

Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

Corporate Security Responsibility

All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

Abide by Mastercard’s security policies and practices;
Ensure the confidentiality and integrity of the information being accessed;
Report any suspected information security violation or breach, and
Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.

In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: 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; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.

THIS POSTING RELECTS ONE OR MORE CURRENT VACANCIES ON OUR TEAM, AND MASTERCARD INTENDS TO FILL THIS POSITION BY 02/02/2027. If the fill date has passed, Mastercard intends to fill this position as soon as possible.

Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD

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