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$115k - $184k
...Senior Software Engineering (RPA - Automation Anywhere 360 & C# .NET) Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories... ...and identify automation opportunities. Design, develop, and implement RPA solutions using Automation...SeniorSoftwareC#Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago$85.15k - $153.93k
...Leidos FS2 Aero team has an opening for an experienced Full Stack Software Developer r to modify existing code and integrate software solutions for... ...able to develop and deploy cores services (Lambda, EC2s). C#/Java and JavaScript/TypeScript, Python, Shell scripting....SoftwareC#Work at officeLeidos
Saint Charles, MO7 days ago$94k - $157k
...greatest potential. Title and Summary Senior Bizops Engineer The Business... ...barriers to run our products by fostering developer run ownership and empowering developers... ...developers during the application build phase in software run principals that includes operational...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO3 days ago$115k - $184k
...realize their greatest potential. Title and Summary Senior Software Engineer - Cloud Platforms Overview: Join our mission-... ...platforms to enhance functionality and streamline processes. Develop and maintain APIs for SaaS integrations, ensuring they are secure...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO3 days ago- ...native technologies. This is a highly technical role ideal for senior developers or leads passionate about solving complex problems in a fast... ..., Cassandra , Zookeeper , and Splunk . Apply software engineering principles such as SOLID , DRY , and design...SoftwareFull timeLocal area
Veracity
O Fallon, MO4 days ago - ...Microservices and REST API Proficiency: Skilled in developing web services, particularly microservices... ...environments effectively. # Modern Software Design Principles: Deep understanding... .... This person would fit well into a senior or lead developer role, where they can...SoftwareFull time
Veracity
O Fallon, MO3 days ago - ...Job Title: Senior Software Engineer Overview: Job Overview Responsible for the analysis, design, development and delivery of software... ...to MasterCard standards, processes and best practices. Develop, customize, and test applications to integrate to MasterCard'...SeniorSoftwareWork experience placement
MasterCard
O Fallon, MO4 days ago - ...Senior Software Engineer (iOS Developer) Location: St Louis, Missouri Duration: 12 months Glider: Software Engineer ADVANCED What are your top 3 required technical skills? Advanced level knowledge of native iOS development (Swift/Objective-C/Swift UI)...SeniorSoftware
RIT Solutions
O Fallon, MO1 day ago - Senior Software Dev Engineers O'Fallon MO (remote FOR NOW but will need to eventually be onsite) We can consider fully remote for a very strong candidate Looking for 2 Senior Software Dev Engineers This is part ofSeniorSoftwareRemote work
Samprasoft
O Fallon, MO3 days ago - ...Job Description Job Description Role:-SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET) Location:-O’fallon MO Visa:-USC/GC... ...ensure the quality and functionality of assigned MasterCard developed systems. • Do you want to be a part of a collaborative team...SeniorSoftware
Resource Informatics Group Inc
O Fallon, MO14 days ago - ...Senior Software Engineer O'Fallon, Missouri contract Rate: DOE U.S. Citizens and those authorized to work in the U.S. are encouraged... ...Description Java, Spring, and Spring Boot Required. Everything is developed in that Rest API knowledge is a plus Very Mu......SeniorSoftwareContract work
Staffing the Universe
O Fallon, MO4 days ago - ...Responsible for the analysis, design, development and delivery of software solutions Defines requirements for new applications and... ...works to improve experience and metrics in ownership area Develop complete understanding of end-to-end technical architecture and...SeniorSoftwareContract workLocal area
ShiftCode Analytics
O Fallon, MO4 days ago - Sr. Sdet Location: O'Fallon, MO (on site from day1) Full Time Mandatory: API Testing Note Please don't send UI testing profiles Job Description: Key Skills and Experience: Hands on Java/Rest API testing experience Test automation, Ops gating, Integration Testing Rest...SeniorSoftwareFull time
Veracity
O Fallon, MO1 day ago $200k - $320k
...greatest potential. Title and Summary Senior Principal Data Architect - Finance... ...event driven processing. • Has skills to develop and evangelize on reference architecture... ...• 15+ years of engineering experience in software, data, or related field. • Prior experience...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago$99k - $158k
...realize their greatest potential. Title and Summary Senior Product Manager - Technical Senior Product Manager - Technical... ...You Essential Knowledge/Experience • Deep knowledge of software development lifecycle • Experience with Agile methodology •...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMastercard
O Fallon, MO5 days ago- ...Software Engineer I, Launch Program 2026 Mastercard works to connect and power a sustainable... ...for talented software engineers to develop advanced technologies and applications that... ...programming languages such as: Java, JavaScript, C#, Python, etc. Familiarity using...SoftwareC#Work experience placementInternship
MasterCard
O Fallon, MO5 days ago - About Us: At *** (*** | Connected World, Connected Experiences), we live the philosophy of connected world and connected experiences. We thrive on change that is powered by the intelligent symphony of technology and humans designing meaningful and sustainable experiences...SeniorSoftware
Yantran LLC
O Fallon, MO4 days ago $115k - $184k
...Senior Software Engineer Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our... ...your career, we'd love to hear from you. Role Hands-on developer who writes high quality, secure code that is modular,...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMissouri Staffing
O Fallon, MO3 days ago- ...engineering of custom products at the drafting stage. Explore New Tools: Leverage our seats in SketchUp or Inventor—or bring your own software ideas to the table (we’re open to innovation!). Research & Innovate: Investigate potential materials and devices on a project...SeniorSoftwareFull time
DH Schmidt Co.
Saint Peters, MO8 days ago $99k - $158k
...their greatest potential. Title and Summary Senior Product Manager - Technical Overview:... ...professional who wants to shape the Developer XP for Mastercard’s products? Do you want... ...customers, Technical Program Managers, Software Design Engineers, and User Experience. You...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMastercard
O Fallon, MO5 days ago- ...Summary Seeking an experienced full stack Software Engineer with proficiency in Java and Angular development, to assist the company... ...within the rest of the application environment. Will also develop Angular on the front end. Any ERP experience is nice to have as...SeniorSoftwareFull timeLocal areaRemote workRelocation
Timeless Technology Solutions
Dardenne Prairie, MO17 hours ago $99k - $158k
...governments realize their greatest potential. Title and Summary Senior PMT - Hands on Testing Job Description Summary OVERVIEW At... ...or command line operations • Advantage: you have developed and tested software with automation tools • Advantage: White box testing with...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMastercard
O Fallon, MO17 hours ago$18 per hour
...Internships and Co-Op Programs. General Overview : Seek and develop new and innovative ideas for products with designs, sketches,... ...higher preferred). Experience with 3D design and modeling software – NX or Solidworks preferred. Experience with Adobe Creative...SoftwareHourly payTemporary workInternshipSeasonal workWork at officeRawlings Sporting Goods Company Inc
O Fallon, MO17 days ago- ...Software Engineer II Location: O'Fallon, Missouri (Main Campus) --- Local Candidates Only!! Duration: End of 2025 Glider: Software Engineer II - (Apache Spark, Airflow, Databricks, AWS, CICD and Coding(Java/Python/Scala); What are your top 3 required technical skills...SoftwareLocal area
RIT Solutions
O Fallon, MO2 days ago $115k - $184k
...governments realize their greatest potential. Title and Summary Senior Software Engineer (Testing Focus) Overview •Been the victim of... ...for combating scammers? The Payment Resiliency team develops new products for Mastercard's fraud prevention platform. We protect...SeniorSoftwareFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO7 hours agonew$94k - $157k
...greatest potential. Title and Summary Senior Reliability Engineer Overview The... ...accomplished by closely partnering with developers to design, build, implement, and support... ...CI/CD pipeline for promoting software into higher environments through validation...SeniorSoftwareFull timePart timeWorldwideFlexible hoursShift workMasterCard
O Fallon, MO2 days ago- ...systems, distributed architectures, cloud computing, cybersecurity, software development lifecycles (SDLC), and emerging technologies. •... ...clear, concise, and impactful reports and presentations for senior management and relevant committees, articulating complex technical...Software
MasterCard
O Fallon, MO2 days ago - ...Bachelors or Masters in CS or related degrees. Minimum of 6+ years with Master or 8+ years with Bachelors of hand on experience in software development in test automation, concurrent coding skills in Java. Test automation experience using open source technologies and/or...Software
Staffing the Universe
O Fallon, MO1 day ago - ...Specific Job Responsibilities Lead a team of Application Developers through the full Software Development Life Cycle of design, development, security... ...builds custom solutions with TypeScript, JavaScript, .NET, C#, Flutter and SQL Thorough, hands-on knowledge and...SoftwareC#Work at office
$148k - $237k
...• Lead an innovative team to manage the existing business and develop new products and services. • Create and manage a common product... ...Mastercard core payments experience required; • SDLC and software architecture experience preferred; • MBA preferred; • Good...SoftwareFull timePart timeWorldwideFlexible hoursMastercard
O Fallon, MO2 days ago
