Java jobs in o'fallon USA
37 java jobs found in o'fallon: showing 1 - 37
Senior Java Backend Developer
Company: Cynet Systems |
Job Overview: Requirement/Must Have: 6+ years of experience in backend development using Java. Strong expertise... in Core Java, Spring Boot, and REST APIs. Hands-on experience with Kafka / event streaming platforms. Solid understandingLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 22 Jun 2026
Only W2 | Senior Java Backend Developer
Company: Noblesoft Technologies |
Role: Senior Java Backend Developer Location: O'Fallon, Missouri [Onsite] Contract Job Description: 6+ years... of experience in backend development using Java. Strong expertise in Core Java, Spring Boot, and REST APIs. Hands-on experienceLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 22 Jun 2026
Senior Software Engineer
Company: Mastercard |
/practices and enhance productivity All about you Working experience across multiple programming languages (JAVALocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 13 Jun 2026
Manager, Platform Engineering - Big Data Engineering
Company: Mastercard |
Proficiency in at least one programming language (e.g., Python, Java, Go) Strong understanding of operating systemsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 11 Jun 2026
Lead Software Engineer
Company: Mastercard |
development efforts using Java, Spring Boot, and work with Oracle databases for performance tuning and data modeling. Design... software engineering experience with a strong focus on backend systems. Hands-on expertise in: -- Java, Spring BootLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 10 Jun 2026
Senior Software Engineer
Company: Mastercard |
programming skills( OOP, SOLID, 12-factor) - java preferred Experience in Continuous Integration (CI) and Delivery (CD) concepts... to write code (in languages such as Java, Python, Bash) to build automation tasks that are repeatable and efficientLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 10 Jun 2026
Lead Software Engineer
Company: Mastercard |
development with applicable JAVA technologies (Core JAVA, Spring Integration, Spring Boot, Hibernate, REST/SOAP web servicesLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 09 Jun 2026
Software Engineer Ii
Company: Mastercard |
in software development and the full Software Development Lifecycle (SDLC). Strong proficiency in Java and experience workingLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 09 Jun 2026
Senior Software Engineer
Company: Mastercard |
applications and microservices Develop REST APIs using Java and Spring Boot, focusing on performance, scalability, and reliability... using Java and Spring Boot Strong experience designing scalable systems using modern software design and architectureLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 06 Jun 2026
Software Engineer Ii
Company: Mastercard |
, and maintain scalable applications and microservices Develop REST APIs using Java and Spring Boot with a focus on performance... for quality and security All About You Experience building RESTful services using Java and Spring Boot Hands-on experienceLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 05 Jun 2026
Manager Software Engineering (qa/automation)
Company: Mastercard |
(microservices, APIs, scalable systems) Strong Core Java experience Deep familiarity with test automation frameworks and modernLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 04 Jun 2026
Software Engineer Ii
Company: Mastercard |
through hands-on delivery and collaboration. All About You Experience building applications and REST APIs using JavaLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 04 Jun 2026
Software Engineer Ii
Company: Mastercard |
or experience. Demonstrate intermediate to advanced knowledge of Java, Spring Boot, and REST API development Understand relationalLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 03 Jun 2026
Senior Software Engineer
Company: Mastercard |
development of new products that deliver meaningful customer value. We are looking for a Senior AI Java Engineer (Hands-on IC...) In this role, you will: Build and own Java services and APIs that deliver AI-powered features, ensuring performance, scalabilityLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 28 May 2026
Senior Software Engineer
Company: Mastercard |
, performance, and scalability Proven experience working with: - JAVA JDK 11-17, Spring Boot, Spring Security, Maven, HibernateLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 27 May 2026
Manager, Technical Program Management
Company: Mastercard |
Certifications (Agile, PMI, ITIL, DevOps, cloud computing, Java, etc.) preferred, or equivalent work experience ExperienceLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 27 May 2026
Manager Software Engineering
Company: Mastercard |
Identify best-of-breed methods / tools / APIs and assess technical fit, Development experience in Java application development..., Payments, Knowledge of BDD/TDD methodology and technologies like Cucumber, Test Automation using Java. People ManagerLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 22 May 2026
Senior Software Engineer - Java Full Stack Engineer
Company: Mastercard |
potential. Title and Summary Senior Software Engineer - Java Full Stack Engineer All About Us MasterCard is a technology... on development of Enterprise Application Development using Java tech stack and Angular/React as the Front-end technologiesLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 21 May 2026
Senior Software Engineer
Company: Mastercard |
of Enterprise Application Development using Java tech stack and Angular/React as the Front-end technologies. Participate in the.... Proficient working with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and Database (Oracle, SQL Server) ExperienceLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 21 May 2026
Senior Site Reliability Engineer
Company: Mastercard |
is needed. Experience in one or more of the following is preferred: C, C++, Java, Python, Go, Perl or Ruby. Interest in designingLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 19 May 2026
Usa_developer
Company: Varite |
. Programming: Java (Core), Python (for Airflow), Unix Shell Scripting. Big Data/Storage: Apache Spark" Essential Skills: BigLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 15 May 2026
Lead Software Engineer
Company: Mastercard |
ownership of large-scale distributed systems Proficiency in modern programming languages (e.g., Java, C#) and frontendLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 14 May 2026
Lead Site Reliability Engineer
Company: Mastercard |
, and performance of our Java, Spring Framework applications, supporting essential services that power Mastercard's global operations... to development teams.Role qualifications:Ideal candidates have:- BS in Computer Science or related field.- Proficiency in JavaLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 13 May 2026
Software Engineer Ii
Company: Mastercard |
languages (Java is a must) Familiarity with Agile development practices, testing concepts, and version controlLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 08 May 2026
Software Developer- Emr Integration
Company: Adaptive Solutions Group |
, Node JS, Java Script, Vue 3Location: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 06 May 2026
Senior Site Reliability Engineer
Company: Mastercard |
of urgency is needed. Experience in one or more of the following is preferred: C, C++, Java, Python, Go, Perl or Ruby. InterestLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 05 May 2026
Software Development Engineer In Test (sdet) Ii
Company: Mastercard |
with scripting languages, preferably shell scripting. Proficiency in C/C++ or Java for test development and system validationLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 05 May 2026
Senior Software Engineer
Company: Mastercard |
, modern architecture using Java, Spring boot, Kafka, C++, JNI or similar technologies. BS in Computer Science or related... development environment, preferably Jenkins. Experience with Java/J2EE Experience with cryptographic primitives, conceptsLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 05 May 2026
Software Engineer Ii
Company: Mastercard |
languages (Java is a must) Familiarity with Agile development practices, testing concepts, and version controlLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 01 May 2026
Lead Site Reliability Engineer
Company: Mastercard |
, and performance of our Java, Spring Framework applications, supporting essential services that power Mastercard's global operations... to development teams.Role qualifications:Ideal candidates have:- BS in Computer Science or related field.- Proficiency in JavaLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 30 Apr 2026
Senior Data Engineer (apache Spark, Nifi, Sql)
Company: Mastercard |
through Spark with Scala/Python/Java on Hadoop or Object storage Experience of building Nifi pipelines Experience of workingLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 29 Apr 2026
Software Engineer
Company: Mastercard |
. - Full stack developer with ability to write secure code in backend & frontend programming languages (Java, JavaScriptLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 23 Apr 2026
Senior Software Engineer
Company: Mastercard |
in Java and Springbased platforms, strong engineering ownership, and the ability to collaborate effectively with distributed... teams in an agile delivery model. Role Design, build, and maintain highly available, resilient Java SpringbasedLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 08 Apr 2026
Manager, Software Engineering
Company: Mastercard |
with a technical vision prioritizing business value, tech stack includes Java, Angular, PCF, Spring boot and Oracle Lead by example... and successfully engage your development team Proficient programming skills with a deep understanding of Java, Angular, SQL and SpringLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 08 Apr 2026
Senior Software Engineer (big Data)
Company: Mastercard |
, and automation across the organization. This is a Software Engineer backend engineering role, focused on Scala/Python/Java... with Data Platform Engineering Design, develop, and maintain backend services and data pipelines using Scala, Python and JavaLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 02 Apr 2026
Senior Software Engineer
Company: Mastercard |
and P99 response latency, query performance, concurrency, and system utilization Dig into Java code, databases, middleware... using Java Spring Boot framework Strong experience debugging performance issues with APM tools (i.e. Dynatrace, SplunkLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 27 Mar 2026
Software Engineer Ii
Company: Mastercard |
, including writing and executing test scripts Strong proficiency in TypeScript, Java, and SQL, with experience building