Java jobs in o'fallon USA
65 java jobs found in o'fallon: showing 1 - 50
Java Engineer
Company: Staffingine |
Job Title: Java Engineer Job Location: O'Fallon, Missouri Job Type: Contract Job Description: * Java Expertise...: Has at least 8+ years of hands-on Java development experience, specifically in J2EE (Java 2 Platform, Enterprise EditionLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 01 Aug 2026
Sr. Software Engineer
Company: Connvertex Technologies |
Top 3 Required Skills: 1. Java Full Stack Engineering Java 8+, J2EE, Spring, Hibernate Angular/React front-end... applications using a Java technology stack with Angular or React as front-end technologies. Participate in gathering and refiningLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 01 Aug 2026
Java
Company: Akaasa Technologies |
Java, Kafka based event driven micro-services 2. Agentic software development 3. Production support and platform... optimization Role: The Software Development Engineer is a hands-on developer specializing in Java development with a particularLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 01 Aug 2026
Sr. Software Engineer
Company: VSG Business Solutions |
Required Skills: 1. Java Full Stack Engineering Java 8+, J2EE, Spring, Hibernate Angular/React front-end development REST/SOAP... applications using a Java technology stack with Angular or React as front-end technologies. Participate in gathering and refiningLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 01 Aug 2026
Java Engineer
Company: Apptad |
Role: Java Engineer Work Location: O'Fallon, Missouri Onsite (5days) Duration: long term contract Key... Responsibilities: An ideal candidate for this role would have extensive experience in Java development and be well-versed in cloudLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 01 Aug 2026
Full Stack Java Developer
Company: Smart IMS Inc |
Job Title: Full Stack Java Developer Duration (Contract): 6 Months Client Location: O'Fallon, Missouri 63368... Location Preference: Onsite Job Description: As a Full Stack Java Developer, you will design, develop, modernizeLocation: O'Fallon, MO, USA
| Salary: US$40 - 80 per hour | Date posted: 01 Aug 2026
Java Software Engineer Ii
Company: Smart IMS Inc |
Job Title: Java Software Engineer II Duration (Contract): 12 Months Client Location: O'Fallon, Missouri Location... Preference: Onsite Job Description: As a Java Software Engineer II, you will develop and support high-performance, eventLocation: O'Fallon, MO, USA
| Salary: US$40 - 80 per hour | Date posted: 01 Aug 2026
Sr. Software Engineer
Company: Akaasa Technologies |
Method of interview: Virtual if non-local, on-site if local Top 3 Required Skills: 1. Java Full Stack Engineering Java 8...-efficient to run. Key Responsibilities Develop enterprise applications using a Java technology stack with Angular or ReactLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 01 Aug 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: 01 Aug 2026
Software Engineer Ii - Decision Management Program
Company: Mastercard |
expertise. What You'll Do Software Development Design, develop, test, and maintain Java/Spring Boot microservices. Design... experience. Experience developing applications using Java and Spring Boot. Understanding of REST APIs and microserviceLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 01 Aug 2026
Senior Site Reliability Engineer, Performance Engineering
Company: Mastercard |
with Java Virtual Machine internals and garbage collection tuning. Experience with one or more of the following: database... with Java, Python, Scala, or other programming and scripting languages. Experience with Bitbucket, Maven, Jenkins, GatlingLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 01 Aug 2026
Software Engineer Ii
Company: Mastercard |
languages (Java is a must) Familiarity with Agile development practices, testing concepts, and version control StrongLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 01 Aug 2026
Senior Software Engineer
Company: Mastercard |
Management Platform. Our high-performance Java platform processes billions of transactions each month, delivering the scale.... Collaborate with global teams to deliver software at scale. All About You Strong experience with Java/J2EE, Spring BootLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 01 Aug 2026
Software Engineer Ii - Decision Management Program
Company: Mastercard |
expertise. What You'll Do Software Development Design, develop, test, and maintain Java/Spring Boot microservices. Design... experience. Experience developing applications using Java and Spring Boot. Understanding of REST APIs and microserviceLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 31 Jul 2026
Agentic Ai Engineer
Company: Diverse Lynx |
Job Description: Java Backend Engineer with Agentic AI skills. Java with Spring Boot - Mandatory ExperienceLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 31 Jul 2026
Senior Site Reliability Engineer, Performance Engineering
Company: Mastercard |
with Java Virtual Machine internals and garbage collection tuning. Experience with one or more of the following: database... with Java, Python, Scala, or other programming and scripting languages. Experience with Bitbucket, Maven, Jenkins, GatlingLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 29 Jul 2026
Software Engineer Java
Company: Korn Ferry |
in Java development with a particular focus producing micro services that then integrate with other services to enable high...-on experience in Java, J2EE, Spring, Spring Boot, Kafka, RESTful web services and JPA You have experience in building AI assistedLocation: O'Fallon, MO, USA
| Salary: US$60 - 75 per hour | Date posted: 29 Jul 2026
Software Engineer Ii
Company: Mastercard |
, and core computer science concepts. Strong technical experience with Java, Java/J2EE, Linux, Oracle, and SQL programming.... Strong knowledge of Java, Spring Boot, Spring Batch, Hibernate, and REST API services. Strong knowledge of Linux and shellLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 29 Jul 2026
Senior Software Engineer -java
Company: Korn Ferry |
Responsibilities Develop enterprise applications using a Java technology stack with Angular or React as front-end technologies... record of developing internal and external partnerships. Proficiency with J2EE, Java 8 or higher, JSP, Servlets, Spring 5Location: O'Fallon, MO, USA
| Salary: US$60 - 80 per hour | Date posted: 28 Jul 2026
Lead Service Management Engineer
Company: Mastercard |
.* Big Data & Cloud Expertise: Strong skills in Python and/or Java/Scala. Deep experience with Spark, Hadoop, Hive/ImpalaLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 28 Jul 2026
Java Ai Engineer
Company: Diverse Lynx |
Role - Java AI Engineer Experience Required - 5+ Years We are seeking a highly skilled Java Developer... expertise in Java, Spring Boot, backend development, and event-driven architectures, along with experience building AI-drivenLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 25 Jul 2026
Senior Java Full-stack Developer
Company: ICONMA |
Our Client, a Credit card company, is looking for a Senior Java Full-Stack Developer for their O'Fallon, MO/Hybrid... location. Responsibilities: Develop enterprise applications using a Java technology stack with Angular or React as frontLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 25 Jul 2026
Java Backend Engineer With Agentic Ai
Company: Artech Information Systems |
Request ID: 100754-1 Title: Java Backend Engineer with Agentic AI Location: O Fallon, MO Duration: 6+ Months... and application development, including excellent programming skills in languages such as Java, Python Hands-on experienceLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 24 Jul 2026
Software Engineer Ii
Company: ICONMA |
and performing systems Solid understanding and hands-on experience in Java, J2EE, Spring, Spring Boot, Kafka, RESTful web servicesLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 24 Jul 2026
Senior Software Engineer
Company: Mastercard |
Management Platform. Our high-performance Java platform processes billions of transactions each month, delivering the scale.... Collaborate with global teams to deliver software at scale. All About You Strong experience with Java/J2EE, Spring BootLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 23 Jul 2026
Software Engineer I
Company: Mastercard |
engineer specializing in Java development with a focus on building microservices that support Mastercard's high-throughput, low... understanding of Java, J2EE, Spring, Spring Boot, Kafka, RESTful Web Services, and JPA. Foundational understanding of softwareLocation: O'Fallon, MO, USA
| Salary: US$72000 - 115000 per year | Date posted: 21 Jul 2026
Software Engineer Ii
Company: Mastercard |
specializing in Java development and microservices architecture. This role independently develops scalable, cloud-ready... business solutions. All About You Solid understanding of Java, J2EE, Spring, Spring Boot, Kafka, RESTful Web ServicesLocation: O'Fallon, MO, USA
| Salary: US$92000 - 147000 per year | Date posted: 18 Jul 2026
Lead Software Development Engineer
Company: Mastercard |
experience. - 3+ years leading large-scale distributed system initiatives. - Expert-level Java, Spring Boot, REST APIsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 18 Jul 2026
Senior Software Development Engineer
Company: Mastercard |
principles. All About You Strong hands-on experience with Java, Spring Boot, Kafka, REST APIs, JPA, and distributed systemsLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 18 Jul 2026
Software Engineer I
Company: Mastercard |
specializing in Java development with a focus on building microservices that support Mastercard's high-throughput, low-latency... understanding of Java, J2EE, Spring, Spring Boot, Kafka, RESTful Web Services, and JPA. Foundational understanding of softwareLocation: O'Fallon, MO, USA
| Salary: US$72000 - 115000 per year | Date posted: 18 Jul 2026
Senior Software Engineer
Company: Mastercard |
applications and REST APIs using Java, Spring Boot, and Spring Data JPA Strong foundation in computer science fundamentalsLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 17 Jul 2026
Senior Software Engineer
Company: Mastercard |
-quality software solutions. The ideal candidate brings strong software engineering fundamentals, hands-on Java development..., testability, reliability, performance, security, and maintainability. Develop robust test automation using Java, Spring, JUnitLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 17 Jul 2026
Manager Software Engineering
Company: Mastercard |
technologies, or low-code/no-code solutions. Experience with Java, React, API-based architectures, and cloud-native platformsLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 16 Jul 2026
Manager, Software Engineering
Company: Mastercard |
or global real-time event streaming systems etc.) - Experience with various coding languages Java, Go, C++,ESQLLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 15 Jul 2026
Architect/tech Lead - Java & Aws
Company: Diverse Lynx |
Role: Architect/Tech Lead - Java & AWS Location: O'FALLON, ST. Louis, MO Mode of interview: Face to Face Project... by a monolithic Java-based application. This role is to make Application cloud-ready (migrate from Java8 and containerizationLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 14 Jul 2026
Senior Software Engineer
Company: Diverse Lynx |
Senior Software Engineer Location: O'Fallon, Missouri - onsite (LOCAL ONLY) Rate - $65/hr. on C2C Java/JEE 6-10... experience in a production environment Expert programming skills in Java/JEE Proficiency in Software Development Best PracticesLocation: O'Fallon, MO, USA
| Salary: US$65 per hour | Date posted: 11 Jul 2026
Lead Software Engineer
Company: Mastercard |
, and operational excellence. All About You: Strong software development experience using C/C++ (Java experience is also valuedLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 08 Jul 2026
Manager, Software Engineering
Company: Mastercard |
Java, C/C++, or similar object-oriented languages. Demonstrated experience designing scalable, secure, highlyLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 08 Jul 2026
Senior Software Engineer
Company: Mastercard |
, You Will Design, develop, and maintain robust and scalable backend services using Java, Spring Boot, and microservices architecture... activities. All About You Strong proficiency and experience in Full Stack Software Engineering. Strong proficiency in JavaLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 08 Jul 2026
Senior Software Engineer (java/jee)
Company: Diverse Lynx |
Senior Software Engineer (JAVA/JEE) Location: O'Fallon, Missouri - onsite (LOCAL ONLY) Contract Rate - $65... experience in a production environment Expert programming skills in Java/JEE Proficiency in Software Development Best PracticesLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 03 Jul 2026
Senior Software Engineer– Rpps Platform
Company: Mastercard |
development, testing, deployment, optimization, and production support. The position requires strong expertise in Java, Spring... utilizes Java, Spring Boot, Angular, APIs, and automation-focused development work. Role As a Senior Software EngineerLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 02 Jul 2026
Senior Software Engineer
Company: Mastercard |
position requires strong expertise in Java-based application development, Spring Boot, Kafka, PostgreSQL, and modern software... to process high-volume transaction workloads. Develop microservices and backend services using Java, Spring Boot, and SpringLocation: O'Fallon, MO, USA
| Salary: US$115000 - 184000 per year | Date posted: 02 Jul 2026
Senior Site Reliability Engineer
Company: Mastercard |
with a sense of urgency is needed. Experience in one or more of the following is preferred: C, C++, Java, Python, Go, Perl or RubyLocation: O'Fallon, MO, USA
| Salary: US$96000 - 163000 per year | Date posted: 01 Jul 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: US$163000 per year | Date posted: 01 Jul 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: US$122000 - 207000 per year | Date posted: 01 Jul 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: US$122000 - 207000 per year | Date posted: 01 Jul 2026
Manager, Software Engineering
Company: Mastercard |
to operate with an enterprise mindset, aligning team output with company-wide objectives Strong hands-on experience in: o Java..., Spring / Java EE o RESTful APIs o Frontend frameworks (Angular / React) o Databases (Oracle / PostgreSQL) ExperienceLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 26 Jun 2026
Lead Software Engineer
Company: Mastercard |
complex engineering problems Technologies Java, J2EE, microservices, RESTful APIs, Angular, Web Services, JavaScript... Strong experience building microservices in Java and developing UI components using frameworks like React or AngularLocation: O'Fallon, MO, USA
| Salary: unspecified | Date posted: 26 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 systems