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- ...grade Java applications, design patterns, and performance optimization. # Microservices and REST API Proficiency: Skilled in developing web services, particularly microservices architectures, and REST APIs. This indicates a strong understanding of how to build,...SuggestedFull time
Veracity
O Fallon, MO3 days ago $115k - $184k
...Integrations Design and implement integrations with third-party SaaS platforms to enhance functionality and streamline processes. Develop and maintain APIs for SaaS integrations, ensuring they are secure, reliable, and scalable. Troubleshoot and resolve integration...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO3 days ago$138k - $221k
...and a strong sense of ownership and innovative spirit? The Cloud Data Platforms team is an excellent opportunity for you to design & develop the next wave of data innovation at MasterCard. Our program is leading the efforts to bring our data and analytics expertise into...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago- Lead Full Stack Engineer Job Location: O'Fallon, MO (Hybrid onsite 3 days/week) Job Travel Location(s): Must be able to travel to office as needed Positions: 1 Employment Type: C2H Duration: Long Term Key Technology: Java, Full Stack, SQL Job Responsibilities: Lead...SuggestedWork at office3 days per week
Veracity
O Fallon, MO1 day ago - Senior Azure Platform Engineer Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using ...Suggested
MasterCard
O Fallon, MO14 hours ago - ...owners Understands operational and engineering experience, actively works to improve experience and metrics in ownership area Develop complete understanding of end-to-end technical architecture and dependency systems Drive adoption of technology standards and...SuggestedContract workLocal area
ShiftCode Analytics
O Fallon, MO4 days ago $112k - $187k
...we are responsible for ensuring that our platform is stable and healthy. We break down barriers to run our products by fostering developer run ownership and empowering developers to build resilient products. We support our developers during the application build phase...SuggestedFull timePart timeWorldwideFlexible hoursShift workMasterCard
O Fallon, MO2 days ago- ...development with deep experience in Java, microservices, and cloud-native technologies. This is a highly technical role ideal for senior developers or leads passionate about solving complex problems in a fast-paced environment. Key Responsibilities: Design, develop, and...SuggestedFull timeLocal area
Veracity
O Fallon, MO4 days ago $100k - $105k
...microservices while providing technical leadership to both onshore and offshore teams. Req. #873804476 Responsibilities Design and develop Java-based microservices architecture Ensure implementation quality, including maintainability, security, and performance best...SuggestedTemporary workFlexible hoursEPAM Systems Inc
O Fallon, MO3 days ago- ...passion for solving complex technical challenges? Do you love learning new technologies and apply it to your team? Have you developed software before - preferably in Java or C/C++? Have you spent time in Linux environments? Have you created scripts to...SuggestedH1bLocal areaWorldwide
ShiftCode Analytics
O Fallon, MO4 days ago $200k - $320k
...undifferentiated heavy lifting. These may be built by A&T team members, curated from best practices in other Mastercard teams, or co-developed by A&T and engineers from the Guild. The Role: As an A&T Sr Principal Software Engineer you will participate in numerous...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO2 days ago- ...-1 ( Need only local candidates ) Visa : USC, GC, GC EAD, H4, L2 Description: We are looking for more junior java developers that have experience with testing that are looking to get into testing. Biggest thing will be confidence with reading code and...SuggestedLocal area
ShiftCode Analytics
O Fallon, MO4 days ago $85.15k - $153.93k
...Job Description Description The Leidos FS2 Aero team has an opening for an experienced Full Stack Software Developer r to modify existing code and integrate software solutions for the Aeronautical Navigation Office. The ideal candidate has an excellent understanding...SuggestedWork at officeLeidos
Saint Charles, MO7 days ago$72k - $115k
...security, reliability, and performance to deliver solutions that delight our customers. We are looking for talented software engineers to develop advanced technologies and applications that are revolutionizing payments. Are you passionate about software engineering? Do...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO2 days ago$115k - $184k
...you're passionate about building great software and ready to grow your career, we'd love to hear from you. Role Hands-on developer who writes high quality, secure code that is modular, functional and testable. Create or introduce, test, and deploy new technology...SuggestedFull timePart timeWorldwideFlexible hoursMissouri Staffing
O Fallon, MO3 days ago- Software Engineer I Location: O'Fallon, MO (Local is Preference) Linux operating and scripting Python with API automation- scripting automation for day to day task Cryptography- how the cert works, and managing it Python or Java- understanding how they run ...Local area
RIT Solutions
O Fallon, MO2 days ago - ...: DOE U.S. Citizens and those authorized to work in the U.S. are encouraged to apply. We are unable to sponsor the currently Job Description Java, Spring, and Spring Boot Required. Everything is developed in that Rest API knowledge is a plus Very Mu......Contract work
Staffing the Universe
O Fallon, MO4 days ago - ...reliability, performance, and are driven to deliver solutions that delight our customers. We are looking for talented software engineers to develop advanced technologies and applications that are revolutionizing payments. Software engineers at Mastercard build the systems that...Work experience placementInternship
MasterCard
O Fallon, MO5 days ago - Job Title: Junior Email Marketing Developer Please read the information in this job post thoroughly to understand exactly what is expected of potential candidates. Location: On-Site (O’Fallon, MO) Position Type: Full-time Exempt Summary: Milestone Marketing...Full timeApprenticeshipWork at officeLocal areaFlexible hours
Automotive Product Consultants, LLC
O Fallon, MO1 day 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...
Yantran LLC
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)...
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 ofRemote work
Samprasoft
O Fallon, MO3 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...Local area
RIT Solutions
O Fallon, MO2 days ago $138k - $221k
...lifecycle, including secure model training, validation, and deployment. Support security engineers in the evaluation of AI systems being developed and implemented. Compliance and Standards: Keep track of emerging industry standards, regulations, and best practices for AI...Full timePart timeFlexible hoursMasterCard
O Fallon, MO5 days ago- Job Title: Senior Email Marketing Developer The following information provides an overview of the skills, qualities, and qualifications needed for this role. Reporting to: Marketing Operations Specialist Location: On-Site (O’Fallon, MO) Position Type: Full-time...Full timeApprenticeshipWork at officeLocal areaFlexible hours
Automotive Product Consultants, LLC
O Fallon, MO1 day ago - Job Title Need strong Testng, Selenium, Java Coding experience Must have: 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...
Staffing the Universe
O Fallon, MO1 day ago - ...relates to building, supporting and implementing full stack Java solutions within the rest of the application environment. Will also develop Angular on the front end. Any ERP experience is nice to have as well. The existing team is strong in their working knowledge but...Full timeLocal areaRemote workRelocation
Timeless Technology Solutions
Dardenne Prairie, MO14 hours ago - ...solutions. Define requirements for new applications and customization adhering to MasterCard standards, processes and best practices. Develop, customize, and test applications to integrate to MasterCard's specifications. Provide leadership, mentoring, and technical...Work experience placement
MasterCard
O Fallon, MO4 days ago $115k - $184k
...fraudsters across the globe? •Interested in creating "That's the stuff!" software for combating scammers? The Payment Resiliency team develops new products for Mastercard's fraud prevention platform. We protect cardholders / card issuers and aim to eradicate credit card...Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO4 hours agonew$115k - $184k
...play a critical role in: Collaborate with stakeholders to understand business process and identify automation opportunities. Design, develop, and implement RPA solutions using Automation Anywhere 360. Partnering with Scrum Master and Product Owners to lead day to day...Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago
