Software developer jobs in O Fallon, MO

 ...healthy. We break down barriers to run our products by fostering developer run ownership and empowering developers to build resilient...  ...support our developers during the application build phase in software run principals that includes operational design, automation, capacity... 

 ...build, deploy, test, recovery, and compliance workflows. Influence DevOps standards across teams, enabling consistent, high‑quality software delivery at scale. Observability & Self‑Healing Systems Define and promote standards for monitoring, alerting, SLOs, and... 

 .... We break down barriers to running our products by fostering developer run ownership and empowering developers to build resilient products...  ...support our developers during the application build phase in software run principles that include operational design, automation,... 

 ...velocity. • Support the application CI/CD pipeline for promoting software into higher environments through validation and operational...  ...the platform. This is accomplished by closely partnering with developers to design, build, implement, and support technology services.... 

 .... We break down barriers to running our products by fostering developer run ownership and empowering developers to build resilient products...  ...support our developers during the application build phase in software run principles that include operational design, automation,... 

 ...to cloud-native stacks. • Experience migrating performance testing suites from LoadRunner to Gatling or BlazeMeter. • Strong software performance analysis, bottleneck identification, scaling, and automation experience. • Experience using AI-enabled tools or large... 

 ...BizOps ensures production readiness by partnering closely with developers to design, build, implement, and support services. Key...  ...focused improvements. Support and improve the CI/CD pipeline for software promotion, enforcing validation and operational gating. Lead... 

 ...Consultant Software Engineer Been the victim of credit card fraud and thought, Vengeance! Yeah, we get it. Want to feel your spine...  ...software for combating scammers? The Transaction Security team develops new products for Mastercard's fraud prevention platform. We... 

 ...technologies. This is a highly technical role ideal for senior developers or leads passionate about solving complex problems in a fast-...  ...Redis , Cassandra , Zookeeper , and Splunk . Apply software engineering principles such as SOLID , DRY , and design... 

 ...solving. This role focuses on analyzing, coding, and delivering software and platform solutions. Operations Automation program supports...  ...automate provisioning across cloud and on prem environments. Develop reusable modules, playbooks, and automation libraries that... 

 ...Duration: 24+ months Description: This job is a developing subject matter expert in the Software Engineering area, influencing stakeholders and applying advanced knowledge to drive achievement of area goals and initiatives by contributing to solution development... 

Mastercard seeks a Lead Site Reliability Engineer in our Information Technology & Digital Solutions team within the Payments Solutions & Processing industry. You will design and operate secure, highly available, low-latency platforms that power global payment services. ...

 ...implement resilient cloud-native architectures, build and refine CI/CD pipelines, and develop robust monitoring, alerting, and incident response practices. Collaborating closely with software engineering, security, and operations teams, you’ll lead reliability strategy,... 

Mastercard is seeking a Lead Site Reliability Engineer to drive reliability, scalability, and security for mission-critical financial services platforms. You will design and optimize cloud-native, highly available systems, implement SRE best practices, and lead incident...

 ...Lead Software Development Engineer Location: O’Fallon, MO Duration: 24 months Interview process: First round phone, second round...  ...What are your top 3 required technical skills? Manage and develop system integration and functional testing strategies and subsequent... 

Mastercard is seeking a Senior Site Reliability Engineer to enhance reliability, scalability, and performance of our critical IT & Data Management platforms. You will design resilient architectures, automate deployments, and champion observability to ensure always-on services...

 ...automate infrastructure and deployments, and lead performance testing and tuning across distributed systems. Collaborating closely with software and platform teams, you’ll champion SRE best practices, improve incident response, reduce toil, and mentor engineers in building... 

 ...you will design and implement robust monitoring, automation, and incident response processes to support innovative, user‑focused software products. You will collaborate closely with development and infrastructure teams to build and maintain highly available, secure cloud... 

Java Lead Role - Java Lead Experience Required - 6+ Years Must Have Technical/Functional Skills Object-oriented Programming Web services & API standards (REST/OAuth/JSON) Programming & Scripting Languages (2 or more of Java, C++, Scala, JS, Python, Shell...

 ...Management team. You’ll design, build, and optimize resilient, secure, and scalable platforms that power global payments. Partner with software and data teams to improve reliability, observability, and performance of distributed systems. Automate deployments, incident... 

 ...realize their greatest potential. Title and Summary Senior Software Engineer Who is Mastercard? We work to connect and power an...  ...speed and agility as part of a small team. This will involve developing high-performing, highly scalable software solutions and products... 

Job Title Visa status: U.S. Citizens and those authorized to work in the U.S. are encouraged to apply. Tax Terms: W2, 1099 Corp-Corp or 3rd Parties: Yes Description Deep understanding of Web Engineering, JEE architecture stacks and performance patterns, performance...

 ...Workday Integration, Dell Boomi, MuleSoft, or similar middleware solutions . The candidate will be responsible for designing, developing, and delivering scalable integration solutions across enterprise applications, ensuring seamless data exchange and business process... 

 ...cross-functional and multi-disciplinary team responsible for developing next generation, state-of-the-art digital capabilities. This position...  ...or project engineering in Model Based Systems Engineering, Software Engineering, and Data Science, including in classified... 

RequiredEducation: • BachelorsDegreeincomputerscience,Engineeringorarelatedsubject RequiredExperience/skills: • ProficientinnativeiOSdevelopmentusingSwiftandframeworkslikeSwiftUIorUIKit,withasolidunderstandingofObjective-C.Alsoexperiencedincross-platformmobiledevelopmentusingtoolssuchasReactNativeorXamarin...

 ...Job Description: Java Backend Engineer with Agentic AI skills. Java with Spring Boot - Mandatory • Experience in developing Agentic AI applications. - Mandatory • Knowledge of SQL with Oracle and PostgreSQL - Mandatory • Knowledge of REST API development and... 

 ...Under a new CEO, *** is committed to a transformative journey with 'Scale @ Speed' as our guiding principle. Title- Full Stack Developer Location- St. Louis, MO Mode of Interview- (L1 -Video and L2/Final- face to face) Roles and Responsibilities: Hands-on... 

 ...achieve successful product development outcomes. This includes integration and coordination of all system development functions (software engineering, hardware engineering, integration, design control and product validation) as well as integration and coordination with... 

 ...and offboard systems, including distributed sensors, datalinks, external mission services, and partner-provided capabilities. Develop and evaluate mission logic related to sensor integration, track management, mission planning, state awareness, decision support, and... 

 ...governments realize their greatest potential. Title and Summary Lead Software Engineer (C/C++) Overview This is an exciting opportunity...  ...initiative • Create technical designs and assign work to developers • Develop complex stories in C and write unit tests in C++ (...