38 junior java developer jobs at 16 companies in Washington, MO
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Junior Application Developer
Denver or Springfield or Sterling or St. Louis
$53k-$106k/yr OnsiteFull Time
0+ YOEBachelor's or equivalent, 0–3 years development experience, experience with Java and/or Python, familiarity with web apps and relational databases, TS/SCI clearance with polygraph required.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium, Git, CI/CD, containerization
1mo
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SDC Java Software Developer---Staff/Analyst---St. Louis (St. Louis, MO, US, 63105)
St. Louis, Missouri, United States
$55k-$113k/yr HybridFull Time
1+ YOEBachelor's in CS or related, 1+ year software development experience, backend (Java/Python/Node.js), REST/APIs, cloud (AWS/Azure), microservices, frontend (React/Angular), CI/CD, Git, testing/TDD/BDD; willing to travel up to 50%.
Java, Python, Node.js, REST, NoSQL, Microservices, Serverless, AWS, Azure, React, Angular, Akka, Scala, Kafka, RabbitMQ, ElasticSearch, Hadoop, Spark, Flume, Mongo, Cassandra, Git, CI/CD, TDD, BDD, IaaS, PaaS
2w
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Junior Application Developer
Denver or St. Louis or Sterling or Springfield
$53k-$106k/yr OnsiteFull Time
0+ YOEBachelor's (or equivalent),0–3 years software development experience,Java and/or Python,web development and relational DB familiarity,TS/SCI clearance with polygraph,teamwork and problem-solving skills.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium, Git, CI/CD
2mo
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Geospatial Backend Developer – Multiple Positions at Junior/Mid/Senior Levels
St. Louis or St. Charles or Virginia or Sun Prairie
OnsiteFull Time
2+ YOEActive Top Secret/SCI clearance, bachelor’s degree in STEM, 2+ years backend development with Python/Node.js/Java, experience with ArcGIS Enterprise, containerization, API design, and geoprocessing workflows.
ArcGIS Enterprise, Python, Node.js, Java, Docker, Kubernetes, PostgreSQL/PostGIS, SQL Server, Azure, AWS, GCP
1mo
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Mulesoft Developer
St. Louis, Missouri, United States
HybridFull Time
2+ YOEBachelor's or equivalent,2+ years software development experience with Java, Python, JavaScript, build tools (Maven/Gradle), frontend (HTML/CSS), and cloud (GCP/AWS/Azure).
Mulesoft, Java, Python, Javascript, Maven, Gradle, HTML, CSS, GCP, AWS, Azure, Angular, Bootstrap, JAVA/J2EE, SpringBoot, SVN, Git, Github, JDK, SQL Server, MySQL, JIRA, Confluence, JUnit, Selenium, LoadRunner, SoapUI, Data Fabric, CSA Toolset
2d
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Embedded Software Engineer Intern
Bridgeton or St. Louis
$41k-$53k/yr OnsiteInternship
High school diploma or GED and current junior-level or above enrollment in a bachelor's program; basic knowledge of C, C++, C#, Java, Python, git, operating systems, and Microsoft Office.
C, C++, C#, Java, Python, git, MATLAB, Simulink, Windows, Linux, Microsoft Office
3w
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Software Engineer I
St. Louis, Missouri, United States
OnsiteFull Time
0+ YOEBS in EE/Software Engineering/Computer Science,0–3 years experience in desktop or embedded development,proficiency with C/C++,C#,Visual Basic,SQL,Java,IDE experience,embedded systems and hardware testing.
C, C++, C#, Visual Basic, SQL, Java, Microsoft Visual Studio
3mo
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Software Engineer II
O'Fallon, Missouri, United States
OnsiteFull Time
0+ YOEBachelor's degree in computing or related field; foundational software engineering knowledge; Java proficiency; Agile practices; strong problem solving and communication.
Java, Git, Agile, Testing
1mo
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F-15 Mission Systems Software Engineer (Associate, Experienced, & Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
2+ YOEBachelor's degree, ability to obtain U.S. Secret clearance (U.S. citizenship required), 2+ years' experience with C/C++/C#/Python/Java/Ada and object-oriented development, architecture and testing experience.
C, C++, C#, Python, Java, Ada, Agile, SAFe, GitLab, Git Bash, Gradle, Jira, Jenkins, Artifactory, Real-time Operating Systems (RTOS)
2mo
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Software Development Engineer II- Back End
Redlands or St. Louis or Vienna
$97k-$162k/yr OnsiteFull Time
2+ YOE2+ years backend engineering experience; professional experience with Python, Node.js/JavaScript, and Java; experience with ArcGIS Enterprise, containerization (Docker/Kubernetes), API design, and Top Secret/SCI clearance required; Bachelor's in STEM.
Python, Node.js, Java, ArcGIS Enterprise, ArcGIS Enterprise SDKs, Docker, Kubernetes, Azure, AWS, GCP, PostgreSQL, PostGIS, SQL Server
1mo
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F-15 Mission Systems Software Engineer (Associate, Experienced, & Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
2+ YOEBachelor's degree, ability to obtain U.S. Secret clearance (U.S. citizenship required), 2+ years software development experience with languages such as C/C++/C#/Python/Java/Ada, object-oriented programming, and architecture/design experience.
C, C++, C#, Python, Java, Ada, GitLab, Git Bash, Gradle, Jira, Jenkins, Artifactory, RTOS, Agile, SAFe
1w
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F-15 Mission Systems Software Engineer (Associate, Experienced, & Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
Bachelor's in engineering or related field, ability to obtain U.S. Secret clearance/U.S. Person status, 2+ years with C/C++/C#/Python/Java/Ada and object-oriented development, experience designing architectures and embedded real-time software, Agile and DevOps exposure.
C, C++, C#, Python, Java, Ada, GitLab, Git Bash, Gradle, Jira, Jenkins, Artifactory, RTOS, Agile, SAFe
1mo
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Data Engineer
Carmel or St. Louis
HybridFull Time
2+ YOE2+ years building data engineering or data platform solutions; experience with Python/Java/Scala, SQL, Spark/Databricks/Snowflake/Redshift/Azure Fabric/AWS Glue/Azure Data Factory, and AWS or Azure; strong collaboration and communication skills.
Python, Java, Scala, SQL, Spark, Databricks, Snowflake, Redshift, Azure Fabric, AWS Glue, Azure Data Factory, AWS, Azure, CI/CD, infrastructure-as-code, Claude Code, Cursor, Kiro, NoSQL
1mo
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DevOps Engineer Intern
Saint Louis, Missouri, United States
OnsiteFull Time, Internship
Currently pursuing or recently completed degree in CS/Engineering; familiarity with Agile/DevOps, basic programming (Python, C#, Java, JavaScript), Git, Jira, CI/CD, Azure, MLOps; strong analytical and communication skills.
Microsoft Azure, Azure DevOps, Python, C#, Java, JavaScript, Git, Jira, Jenkins, Docker, Kubernetes, Selenium, MLOps
1mo
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Managed Services - Data Engineer - Experienced Associate
Phoenix or Indianapolis or Grand Rapids or Raleigh or Charlotte or Jacksonville or Cincinnati or Cleveland or Columbia or Kansas City or Columbus or Dallas or Las Vegas or Little Rock or Baltimore or Richmond or Louisville or Sacramento or Birmingham or St. Louis or Albany or Tampa or Atlanta or Toledo or Tulsa or Austin or Miami or Milwaukee or Minneapolis or Denver or Des Moines or Nashville or Detroit or New Orleans or Buffalo or Oklahoma City or Fort Worth or Greensboro or Pittsburgh or Houston
$63k-$140k/yr OnsiteFull Time
1+ YOEBachelor's degree, 1+ years' experience, proficiency with Python, Java, SQL, DataStage, DB2/SQL Server, Oracle BI, QlikView/Spotfire, UNIX; experience with data engineering, ETL, and data architecture.
Python, Java, DataStage, Oracle Business Intelligence, QlikView, Spotfire, DB2, SQL Server, SQL, Snowflake, UNIX
1mo
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Quality Engineer
Saint Louis, Missouri, United States
OnsiteFull Time
2+ YOE2+ years SDET/test engineering experience; proficiency in Python, JavaScript, or Java; experience with Selenium, Cypress, or Playwright; API testing (Postman/REST Assured); CI/CD integration; Agile experience and strong analytical/communication skills.
Python, JavaScript, Java, Selenium, Cypress, Playwright, CI/CD, Postman, REST Assured, JMeter, K6, LoadRunner, iOS, Android, AWS, Azure, GCP, Docker
1mo
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Embedded Software Engineer 2 - Avionics
Olathe or Chandler or St. Louis
OnsiteFull Time
1+ YOEBachelor's in a related field plus 1+ year relevant experience (or equivalent). Proficiency in C/C++ and other languages, familiarity with software engineering tools (configuration management, build, debuggers, emulators, simulators, logic analyzers), and customer-facing OEM experience; aviation background preferred.
C, C++, C#, Java, Python, assembly language, configuration management systems, build processes, debuggers, emulators, simulators, logic analyzers
1d
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2026 Intern Conversion – 2027 Technology Analyst Development Program
Charlotte or Irving or Phoenix or Chandler or Saint Louis or Iselin
$38-$63/hr HybridFull Time
0.5+ YOERequires 6+ months of experience or equivalent, STEM bachelor's pursuit, technical knowledge in Java, cloud technology, .NET, Python, or SQL, and understanding of algorithms, APIs, software delivery, and AI.
Java, .NET Core, ReactJS, Node.js, AngularJS, jQuery, JavaScript, Spring Boot, API, Microservices, Harness, OpenShift, Azure, Google, Python, TensorFlow, NumPy, Pandas, MongoDB, MySQL, SQL, GitHub, Terraform, Kubernetes, Docker, Jenkins, Tableau, Power BI, PyTorch, PySpark, Jupyter Notebook, Spark, Kafka, Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint, CI/CD
2d
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Digital Co-op
St. Louis, Missouri, United States
$21-$30/hr HybridFull Time, Internship
Currently pursuing a bachelor's or master's degree in a computer-related field, engineering, or MIS; minimum 2.5 GPA; problem-solving, collaboration, initiative, requirements gathering, and deadline management skills.
.NET, SQL, COBOL, Java, C#, TypeScript, JavaScript, HTML, CSS, MVC, Angular, PowerShell, REST API, Oracle, SQL Server, AWS, Visual Studio, Visual Studio Code, Eclipse, Jira, Confluence, GitHub, Splunk, SQL Server Reporting Services (SSRS), Agile, Scrum, Kanban
2d
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Digital Co-op
St. Louis, Missouri, United States
$21-$30/hr HybridFull Time, Internship
Currently pursuing a bachelor's or master's degree in computer science, computer engineering, management information systems, engineering, or a related field; minimum 2.5 GPA; problem-solving and collaboration skills.
.NET, SQL, COBOL, Java, C#, TypeScript, JavaScript, HTML, CSS, MVC, Angular, PowerShell, REST API, Oracle, SQL Server, AWS, Visual Studio, Visual Studio Code, Eclipse, Jira, Confluence, GitHub, Splunk, SQL Server Reporting Services (SSRS), Agile, Scrum, Kanban
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