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- ...optimization. # Microservices and REST API Proficiency: Skilled in developing web services, particularly microservices architectures, and... ...to work within cloud environments effectively. # Modern Software Design Principles: Deep understanding of design principles...SuggestedLocal area
Damco Solutions
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 - ...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...SuggestedFull timeLocal area
Veracity
O Fallon, MO4 days ago $100k - $105k
...We are seeking a senior-level Java Software Engineer with strong technical expertise to guide development efforts and drive high-quality... ...teams. Req. #873804476 Responsibilities Design and develop Java-based microservices architecture Ensure implementation...SuggestedTemporary workFlexible hoursEPAM Systems Inc
O Fallon, MO3 days ago$138k - $221k
...Platforms team is an excellent opportunity for you to design and develop the next wave of data innovation at MasterCard. Our program is... ...teams, including data scientists, data analysts, and software engineers, to help drive data-driven decision making throughout...SuggestedFull timePart timeWorldwideFlexible hoursMissouri Staffing
O Fallon, MO1 day ago$115k - $184k
...realize their greatest potential. Title and Summary Senior Software Engineer - Cloud Platforms Overview: Join our mission-driven... ...to enhance functionality and streamline processes. Develop and maintain APIs for SaaS integrations, ensuring they are secure...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO3 days ago$200k - $320k
...their greatest potential. Title and Summary Sr Principal Software Engineer Overview: Architecture &Technology (A&T) is a... ...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...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO2 days 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, MO5 days ago - ...H4, L2 Description: We are looking for more junior java developers that have experience with testing that are looking to get into... ...functional and integration testing. Expert in full stack software development test approaches & frameworks: TDD/BDD, Unit tests,...SuggestedLocal area
ShiftCode Analytics
O Fallon, MO4 days ago $72k - $115k
...governments realize their greatest potential. Title and Summary Software Engineer I (Java/Fullstack) Overview: At Mastercard, our... ...customers. We are looking for talented software engineers to develop advanced technologies and applications that are revolutionizing...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO2 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...SuggestedContract workLocal area
ShiftCode Analytics
O Fallon, MO4 days ago $112k - $187k
...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...SuggestedFull timePart timeWorldwideFlexible hoursShift workMasterCard
O Fallon, MO2 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...Suggested
Yantran LLC
O Fallon, MO4 days ago $138k - $221k
...Secure AI Development: Collaborate with data scientists and software engineers to integrate security best practices into the AI development... ...security engineers in the evaluation of AI systems being developed and implemented. Compliance and Standards: Keep track of...SuggestedFull timePart timeFlexible hoursMasterCard
O Fallon, MO5 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...Suggested
Staffing the Universe
O Fallon, MO1 day ago - ...Job Title: Senior Software Engineer Overview: Job Overview Responsible for the analysis, design, development and delivery of... ...adhering to MasterCard standards, processes and best practices. Develop, customize, and test applications to integrate to MasterCard's...Work experience placement
MasterCard
O Fallon, MO4 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...Full timeLocal areaRemote workRelocation
Timeless Technology Solutions
Dardenne Prairie, MO5 days ago - ...to performance test and tune each release. We are looking for software engineers that are passionate about creating high quality software... ...new technologies and apply it to your team? Have you developed software before - preferably in Java or C/C++? Have you spent...H1bLocal areaWorldwide
ShiftCode Analytics
O Fallon, MO4 days ago $92k - $147k
...and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II - iOS Developer Software Engineer II: Who is Mastercard? Mastercard is a global technology company in the payments industry....Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO3 days ago$85.15k - $153.93k
...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 of software...Work at officeLeidos
Saint Charles, MO2 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 - ...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 - ...Software Engineer I, Launch Program 2026 Mastercard works to connect and power a sustainable and inclusive global economy. We are a... ...our customers. We are looking for talented software engineers to develop advanced technologies and applications that are revolutionizing...Work experience placementInternship
MasterCard
O Fallon, MO5 days ago $138k - $221k
...their greatest potential. Title and Summary Manager, Software Engineering Overview Responsible for the analysis, design, development... ..., or Product bundles Work with business/product owners to develop and deliver on new services to introduce new products and...Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago- ...Senior Software Engineer O'Fallon, Missouri contract Rate: DOE U.S. Citizens and those authorized to work in the U.S. are encouraged... ...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 $115k - $184k
...Senior Software Engineer Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with... ...career, we'd love to hear from you. Role Hands-on developer who writes high quality, secure code that is modular, functional...Full timePart timeWorldwideFlexible hoursMissouri Staffing
O Fallon, MO3 days 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 - ...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 $115k - $184k
...Senior Software Engineering (RPA - Automation Anywhere 360 & C# .NET) Our Purpose Mastercard powers economies and empowers people... ...business process and identify automation opportunities. Design, develop, and implement RPA solutions using Automation Anywhere 360....Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago- Intern, Information Security - Engineering Mastercard works to connect and power a sustainable and inclusive global economy. We are a vehicle for commerce, a connection to financial systems for the previously excluded, a technology innovation lab, and the home of Priceless...Summer workInternshipSummer internshipWork at office
MasterCard
O Fallon, MO1 day ago
