Systems Engineer jobs in o'fallon USA
65 systems engineer jobs found in o'fallon: showing 1 - 50
Java Software Engineer Ii
Company: Smart IMS Inc |
Job Title: Java Software Engineer II Duration (Contract): 12 Months Client Location: O'Fallon, Missouri Location... Preference: Onsite Job Description: As a Java Software Engineer II, you will develop and support high-performance, eventLocation: O'Fallon, MO, USA
| Salary: US$40 - 80 per hour | Date posted: 02 Aug 2026
Sr. Software Engineer
Company: Akaasa Technologies |
Sr. Software Engineer Location: Hybrid in O'Fallon, Missouri 3 days a week Duration: 6 months, possible extension...'s degree in information systems, Information Technology, Computer Science, Engineering, or equivalent work experienceLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 02 Aug 2026
Sr. Software Engineer
Company: VSG Business Solutions |
See the role we have below for Sr. Software Engineer with our client Mastercard. This is hybrid in O'Fallon, Missouri 3... Code, Copilot, or similar platforms. All About You Bachelor's degree in information systems, Information TechnologyLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 02 Aug 2026
Java Engineer
Company: Staffingine |
Job Title: Java Engineer Job Location: O'Fallon, Missouri Job Type: Contract Job Description: * Java Expertise... architectures, and REST APIs. This indicates a strong understanding of how to build, scale, and maintain distributed systemsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 02 Aug 2026
Sr. Software Engineer
Company: Connvertex Technologies |
Code, Copilot, or similar platforms. All About You Bachelor's degree in Information Systems, Information Technology..., methodologies, and systems. High energy, strong attention to detail, and the ability to function independently under pressureLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 02 Aug 2026
Java
Company: Akaasa Technologies |
optimization Role: The Software Development Engineer is a hands-on developer specializing in Java development with a particular... in building complex and highly scalable and performing systems Solid understanding and hands-on experience in Java, J2EE, SpringLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 02 Aug 2026
Java Engineer
Company: Apptad |
Role: Java Engineer Work Location: O'Fallon, Missouri Onsite (5days) Duration: long term contract Key... distributed systems effectively. Database and SQL Skills: Proficient in Oracle Database, with expertise in writing complex SQLLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 02 Aug 2026
Site Reliability Engineer Ii
Company: Mastercard |
potential. Title and Summary Site Reliability Engineer II Site Reliability Engineer II Who is Mastercard... Payment Network Business Operations team is seeking a highly motivated and experienced Site Reliability Engineer II (SRELocation: O'Fallon, MO, USA
| Salary: US$76000 - 127000 per year | Date posted: 01 Aug 2026
Senior Site Reliability Engineer, Performance Engineering
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer, Performance Engineering Senior Site Reliability Engineer... for scale. The SRE & Performance Engineering team is looking for a strong, innovative engineer to help optimize and scaleLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 01 Aug 2026
Senior Software Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the..., and distributed systems. Experience building and supporting high-performance, highly available applications. Strong understandingLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 01 Aug 2026
Senior Software Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the... programs with agile, intelligent decision management capabilities worldwide. A Senior Software Engineer is an experiencedLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 01 Aug 2026
Software Engineer Ii
Company: Mastercard |
fundamentals and are eager to grow their technical skills while delivering value to real-world systems. Software Engineer II... potential. Title and Summary Software Engineer II Who is Mastercard? Mastercard is a global technology company in theLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 01 Aug 2026
Data Engineer Ii
Company: Mastercard |
potential. Title and Summary Data Engineer II Overview The Operational Insights Analyst II role within the Program... that aggregate, process, and analyze operational data across multiple systems. The position identifies patterns, trends, and emergingLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 31 Jul 2026
Senior Site Reliability Engineer, Performance Engineering
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer, Performance Engineering Senior Site Reliability Engineer... for scale. The SRE & Performance Engineering team is looking for a strong, innovative engineer to help optimize and scaleLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 29 Jul 2026
Software Engineer Ii - Level 8
Company: US Tech Solutions |
modifications to existing systems, applying established procedures and best practices to improve functionality, securityLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 29 Jul 2026
Software Engineer Java
Company: Korn Ferry |
transactions regardless of channel. Responsibilities: The Software Development Engineer is a hands-on developer specializing... approach Hands on experience in building complex and highly scalable and performing systems Solid understanding and handsLocation: O'Fallon, MO, USA
| Salary: US$60 - 75 per hour | Date posted: 29 Jul 2026
Lead Service Management Engineer
Company: Mastercard |
potential. Title and Summary Lead Service Management Engineer Who is Mastercard? We work to connect and power... better decisions, drives innovation, and delivers better business results. Overview : We are seeking a Lead Data EngineerLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 28 Jul 2026
Senior Software Engineer -java
Company: Korn Ferry |
, methodologies, and systems. High energy, strong attention to detail, and the ability to function independently under pressure..., and agentic patterns. Experience: Bachelor's degree in information systems, Information Technology, Computer ScienceLocation: O'Fallon, MO, USA
| Salary: US$60 - 80 per hour | Date posted: 28 Jul 2026
Java Ai Engineer
Company: Diverse Lynx |
Role - Java AI Engineer Experience Required - 5+ Years We are seeking a highly skilled Java Developer... autonomous systems Must Have Technical/Functional Skills Java with Spring Boot (Mandatory) Experience in developing AgenticLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 25 Jul 2026
Senior Ai Engineer
Company: Mastercard |
potential. Title and Summary Senior AI Engineer Mastercard's Business & Market Insights (B&MI) group empowers..., faster, and more impactful decisions. We transform complex, multi-modal data into agentic systems and generative applicationsLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 25 Jul 2026
Senior Software Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the..., and distributed systems. Experience building and supporting high-performance, highly available applications. Strong understandingLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 24 Jul 2026
Java Backend Engineer With Agentic Ai
Company: Artech Information Systems |
Request ID: 100754-1 Title: Java Backend Engineer with Agentic AI Location: O Fallon, MO Duration: 6+ Months... Salary Range: $45- $47 an hour on W2 or C2C Job Description: Proficiency with distributed/multi-tier systemsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 24 Jul 2026
Software Engineer Ii
Company: ICONMA |
Our Client, a Credit Card company, is looking for a Software Engineer II for their O'Fallon, MO/Hybrid location... and performing systems Solid understanding and hands-on experience in Java, J2EE, Spring, Spring Boot, Kafka, RESTful web servicesLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 23 Jul 2026
Lead, Kubernetes Platform Engineer
Company: Mastercard |
potential. Title and Summary Lead, Kubernetes Platform Engineer Overview Mastercard's Kubernetes Platform Engineering... team is seeking a highly skilled Lead Kubernetes Platform Engineer to drive the strategy, architecture, and evolutionLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 22 Jul 2026
Lead Software Engineer (c/c++)
Company: Mastercard |
potential. Title and Summary Lead Software Engineer (C/C++) Overview This is an exciting opportunity... code and design reviews Collaborate with other Principals and Leads to define interfaces and interactions between systemsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 19 Jul 2026
Lead Software Development Engineer
Company: Mastercard |
potential. Title and Summary Lead Software Development Engineer Overview The Lead Software Development Engineer... Distributed Systems - Architect highly available, fault-tolerant distributed systems capable of processing millionsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 18 Jul 2026
Senior Software Development Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Development Engineer Overview The Senior Software Development Engineer... is a senior individual contributor responsible for designing, developing, and supporting highly scalable distributed systemsLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 18 Jul 2026
Operator
Company: City of O'Fallon |
work Operate and maintain pumps, motors, treatment systems, generators, and lift stations Monitor and control SCADA... systems Collect, analyze, and process various samples Calibrate and maintain chemical feed systems and flow meters PrepareLocation: O'Fallon, MO, USA
| Salary: US$24.74 - 30.07 per hour | Date posted: 17 Jul 2026
Senior Software Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company... at global scale, where speed, reliability, and resilience matter every day. As a Senior Software Engineer, you will collaborateLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 17 Jul 2026
Senior Software Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer Overview Mastercards Network & Digital Payments group creates... is for a Senior Software Engineer who will contribute to the design, development, validation, automation, and operability of highLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 17 Jul 2026
Operator
Company: O’Fallon |
work Operate and maintain pumps, motors, treatment systems, generators, and lift stations Monitor and control SCADA... systems Collect, analyze, and process various samples Calibrate and maintain chemical feed systems and flow meters PrepareLocation: O'Fallon, MO, USA
| Salary: US$24.74 - 30.07 per hour | Date posted: 16 Jul 2026
Senior Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer Who is Mastercard? At Mastercard technology, we work... of a truly global network. With the talent and vision to create the critical systems and products that power global commerceLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 16 Jul 2026
Senior Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer Who is Mastercard? At Mastercard technology, we work... of a truly global network. With the talent and vision to create the critical systems and products that power global commerceLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 15 Jul 2026
Senior Software Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer Overview Mastercards Network & Digital Payments group creates...? Are you agile with a desire to exhibit your skills at the cutting edge with a high standard for excellence? As a Senior EngineerLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 08 Jul 2026
Lead Software Engineer
Company: Mastercard |
a Lead Software Engineer (C/C++) to build and enhance high-performance, mission-critical systems that power secure, reliable... potential. Title and Summary Lead Software Engineer Overview: Mastercard's Global Credit Authorization team is seekingLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 08 Jul 2026
Director, Platform Engineering
Company: Mastercard |
, and automation libraries that standardize infrastructure deployment patterns. Engineer and enhance platform services, including... CI/CD pipelines, secrets management, artifact repositories, and configuration management systems. Implement automatedLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 03 Jul 2026
Senior Software Engineer
Company: Mastercard |
engineer who enjoys solving complex distributed systems challenges, designing scalable event-driven solutions, and working... potential. Title and Summary Senior Software Engineer Who We Are Mastercard powers economies and empowers people in 200Location: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 02 Jul 2026
Senior Software Engineer– Rpps Platform
Company: Mastercard |
potential. Title and Summary Senior Software Engineer RPPS Platform Who is Mastercard? Mastercard powers economies... Solutions organization is seeking a Senior Software Engineer to join the RPPS (Remote Payment and Presentment System) platformLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 02 Jul 2026
Senior Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer Who is Mastercard? At Mastercard technology, we work... of a truly global network. With the talent and vision to create the critical systems and products that power global commerceLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 01 Jul 2026
Senior Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer Overview The BizOps team is looking for a Senior Site... Reliability Engineer who can help us solve problems and enhance our capabilities by supporting applications, servicesLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 01 Jul 2026
Senior Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer Overview-The ProCOM team is looking for a Site Reliability... and overall system health. Scale systems sustainably through mechanisms like automation, and evolve systems by pushingLocation: O'Fallon, MO, USA
| Salary: US$163000 per year | Date posted: 01 Jul 2026
Site Reliability Engineer Ii
Company: Mastercard |
potential. Title and Summary Site Reliability Engineer II Who is Mastercard? At Mastercard technology, we work to connect... of a truly global network. With the talent and vision to create the critical systems and products that power global commerceLocation: O'Fallon, MO, USA
| Salary: US$76000 - 127000 per year | Date posted: 01 Jul 2026
Lead Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Lead Site Reliability Engineer-2 Overview: Who is Mastercard?At Mastercard technology... are energized by the challenges of a truly global network. With the talent and vision to create the critical systems and productsLocation: O'Fallon, MO, USA
| Salary: US$122000 - 207000 per year | Date posted: 01 Jul 2026
Lead Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Lead Site Reliability Engineer Overview The Mastercard Business Operations (BizOps...) organization is seeking a Lead BizOps Engineer to serve as a technical authority and operational architect across criticalLocation: O'Fallon, MO, USA
| Salary: US$122000 - 207000 per year | Date posted: 01 Jul 2026
Lead Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Lead Site Reliability Engineer Job Description Summary Overview: Who is Mastercard... are energized by the challenges of a truly global network. With the talent and vision to create the critical systems and productsLocation: O'Fallon, MO, USA
| Salary: US$122000 - 207000 per year | Date posted: 01 Jul 2026
Senior Platform Engineer – Database Administration (aws Focus)
Company: Mastercard |
potential. Title and Summary Senior Platform Engineer Database Administration (AWS Focus) Overview The Senior Platform... Engineer Database Administration is responsible for designing, implementing, and managing scalable, secure, and highlyLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 30 Jun 2026
Software Engineer Ii
Company: Mastercard |
a Software Engineer II (C/C++) who is passionate about building high-performance, mission-critical systems that operate at global... potential. Title and Summary Software Engineer II Overview: Mastercards Global Credit Authorization team is seekingLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 30 Jun 2026
Lead Software Engineer
Company: Mastercard |
potential. Title and Summary Lead Software Engineer Our Purpose We connect and power an inclusive digital economy... for you! Role As a Lead Software Engineer, you will be responsible for: Design and develop secure, reliable, and scalableLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 26 Jun 2026
Site Reliability Engineer Ii
Company: Mastercard |
potential. Title and Summary Site Reliability Engineer II Who is Mastercard? At Mastercard technology, we work to connect... of a truly global network. With the talent and vision to create the critical systems and products that power global commerceLocation: O'Fallon, MO, USA
| Salary: US$76000 - 127000 per year | Date posted: 26 Jun 2026
Senior Site Reliability Engineer
Company: Mastercard |
potential. Title and Summary Senior Site Reliability Engineer Who is Mastercard? At Mastercard technology, we work... of a truly global network. With the talent and vision to create the critical systems and products that power global commerce