HiringCafe
Join our community

104 junior software developer jobs at 40 companies in O'Fallon, MO

PromotedHiringCafe
Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
3w
Save
Mark Applied
Hide
Junior Software Engineer
Denver or Springfield or Sterling or St. Louis
$69k-$142k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
0+ YOEBachelor's in CS or related, 0–3 years software development experience, Java and/or Python, web app and relational DB familiarity, Agile/SDLC knowledge, strong problem solving, TS/SCI clearance with polygraph.
Java, Python, GIS, ArcGIS, GeoServer, OpenLayers, Cesium
Job PostingView all
3w
Save
Mark Applied
Hide
Junior Software Engineer
Denver or St. Louis or Sterling or Springfield
$69k-$142k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
0+ YOEBachelor's in CS/Software/IS required; 0–3 years software development experience; experience with Java and/or Python; familiarity with web development, relational databases, SDLC/Agile; TS/SCI clearance with polygraph; up to 10% travel.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium
Job PostingView all
1mo
Save
Mark Applied
Hide
Software Engineer Co-Op
St. Louis, Missouri, United States
OnsitePart Time, Internship
Nidec
NidecTokyo Stock Exchange: 6594: Manufactures electric motors and electronic components for industrial applications.
Currently enrolled in a bachelor's program in software engineering, computer science, or similar; available 25–29 hours/week while attending school; support testing, development, assembly, and lab activities for software controls.
Job PostingView all
1d
Save
Mark Applied
Hide
Software Developer 2 (Associate)
O'Fallon, Illinois, United States
HybridFull Time
UNCOMN
UNCOMN: A technology delivering secure software solutions for public and private sector clients.
2+ YOE2+ years software development experience, backend/REST API experience, Java and Azure familiarity, Agile/Jira experience, eligible for U.S. Secret clearance, strong communication and problem-solving skills.
Java, Microsoft Azure, RESTful APIs, Jira
Job PostingView all
1mo
Save
Mark Applied
Hide
Software Engineer - Intermediate
St. Louis, Missouri, United States
HybridFull Time
Equifax
EquifaxNew York Stock Exchange: EFX: Provides consumer credit reporting and data analytics services globally.
2+ YOEBachelor's degree or equivalent, 2+ years software development experience with Java, Python, and JavaScript; experience with cloud (GCP/AWS/Azure), build tools (Maven/Gradle), frontend (HTML/CSS), CI/CD, and AI-assisted coding tools (e.g., GitHub Copilot).
GitHub Copilot, Java, Python, JavaScript, Maven, Gradle, HTML, CSS, JUnit, Git, GitHub, Jenkins, Atlassian, Java 17, Spring Boot, GCP, AWS, Azure, CI/CD, Microservices, Data Fabric, CSA Toolset
Job PostingView all
1mo
Save
Mark Applied
Hide
Software Engineer
Earth City, Missouri, United States
HybridFull Time
MiTek
MiTekNYSE: BRK-B: Provides software and automation for the building industry.
2+ YOEBachelor's in CS or related, 2+ years professional .NET/C# experience, desktop/web app development, Angular and SQL Server proficiency, Agile experience, strong communication skills.
.NET, C#, Angular, Microsoft SQL Server, GitHub Copilot, Git, SonarQube, OPC UA, Mass Transit, RabbitMQ, Microsoft Azure
Job PostingView all
3w
Save
Mark Applied
Hide
Mid Software Developer
O'Fallon, Illinois, United States
OnsiteFull Time
Chenega Corporation
Chenega Corporation: Provides professional government, defense, and facility support services.
2+ YOEMinimum 2 years relevant experience (or HS/GED +6 yrs); experience with AWS (S3, EC2, Lambda), Python, shell scripting, TypeScript, Node.js/Express, ASP.NET Core, C#, Postgres, Kubernetes, Docker, .NET Core, Linux, React, Java, and SQL; AWS Developer certification and TS/SCI clearance preferred; must pass background and drug screening.
Amazon S3, EC2, Lambda, AWS SDK API tools, RDS, Python, Python Flask, Bash, TypeScript, Node.js/Express, ASP.NET Core Web API, Swagger (OpenAPI), C#, Postgres, Kubernetes, Docker, .NET Core, Linux, React, JavaScript, Java, SQL, Gitlab/DevOps, ESRI, Microsoft Word, Microsoft Excel, Microsoft Office
Job PostingView all
2w
Save
Mark Applied
Hide
Associate Software Engineer
Maryland Heights or Hazelwood
$82k-$92k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
1+ YOEBachelor's degree, 1+ year software experience with Git and object-oriented programming; knowledge of C#, JavaScript, SQL; Agile/Scrum familiarity; ability to obtain U.S. Secret security clearance and meet U.S. Person export control requirements.
C#, Javascript, SQL, Git
Job PostingView all
1mo
Save
Mark Applied
Hide
Associate Software Engineer
Maryland Heights, Missouri, United States
$82k-$94k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
1+ YOEBachelor's degree, ability to obtain U.S. Secret Clearance, 1+ year C# .NET development experience, familiarity with web technologies and Azure DevOps, strong communication and critical thinking skills.
C#, .NET, HTML, CSS, Azure DevOps, SAFe Agile
Job PostingView all
1w
Save
Mark Applied
Hide
Software Engineer I
Fenton, Missouri, United States
HybridFull Time
Maritz
Maritz: Provides business incentive, event, and loyalty management solutions.
1+ YOE1-2 years relevant experience or equivalent practical experience; knowledge of web frameworks, OOP, REST services, databases, basic cloud (AWS/GCP/OCI), secure coding, and AI-assisted development tools.
GitHub Copilot, Claude, AWS, GCP, OCI, REST
Job PostingView all
2w
Save
Mark Applied
Hide
Software Developer - Meter Data Management Software (Full Stack, Back End)
Cedar Rapids or Lake Saint Louis or Mandan or United States
HybridFull Time
NISC
NISC: Provides enterprise software solutions for utility and broadband cooperatives.
1+ YOE1+ years software development; full-stack with back-end focus; experience with Databricks, Spark, AWS, Java/Scala/TypeScript, SQL/NoSQL, Docker/Kubernetes, CI/CD tools (JIRA, Confluence, Bitbucket, Bamboo); bachelor's preferred.
Databricks, Delta Lake, Spark, Kafka, Java, Springboot, Typescript, Angular, SQL, Scala, Scala Spark, Pyspark, S3, Lambda, EC2, EMR, SQS, SNS, CloudWatch, Oracle, Postgres, Cassandra, DynamoDB, Docker, Kubernetes, JIRA, Confluence, Bitbucket, Bamboo, CI/CD
Job PostingView all
2mo
Save
Mark Applied
Hide
Software Engineer II
O'Fallon, Missouri, United States
OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
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
Job PostingView all
23h
Save
Mark Applied
Hide
Software Engineer
St. Louis, Missouri, United States
$30-$47/hr HybridFull Time
Merck
MerckXETRA: MRK: A science and technology providing healthcare, life science, and electronics solutions.
1+ YOEBachelor's in CS or related,1+ year AI/ML model training and deployment,experience with autonomous agent frameworks (LangChain,CrewAI,AutoGen),Python/R and ML frameworks,cloud and data tool familiarity.
TensorFlow, PyTorch, Scikit-learn, Pandas, NumPy, SQL, AWS, Google Cloud, Azure, Apache Spark, Airflow, Docker, LangChain, CrewAI, AutoGen, Python, R
Job PostingView all
1w
Save
Mark Applied
Hide
Software Engineer IV – ERP Finance (Oracle/PLSQL)
Saint Louis, Missouri, United States
HybridFull Time
Charter Communications
Charter CommunicationsNASDAQ: CHTR: Provides broadband connectivity, cable, and mobile communication services.
2+ YOE2+ years Oracle and PL/SQL experience; ERP/financial systems development, software lifecycle knowledge, cloud/native and API familiarity, strong communication and problem-solving skills.
Oracle, PL/SQL, Java, Spring, API Gateway, AWS
Job PostingView all
3w
Save
Mark Applied
Hide
Software Development Engineer I
St. Louis, Missouri, United States
$76k-$129k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
1+ YOE1+ years JavaScript/TypeScript experience, bachelor's in CS/Math/GIS/STEM, strong OOP and software methodology knowledge, ability to maintain US security clearance, Python experience for geoprocessing preferred.
JavaScript, TypeScript, Python, HTML, CSS, Swift, Kotlin, ReactJS, Vue, Svelte, GIS, REST Web services, SQL, SQL Server, PostgreSQL, Oracle
Job PostingView all
2w
Save
Mark Applied
Hide
Scott AFB UPP Software Developer
Scott Air Force Base, Illinois, United States
$25/hr HybridPart Time
Small Business Consulting Corporation
Small Business Consulting Corporation: Defense consulting firm specializing in military technology integration and procurement.
Pursuing a bachelor's (rising senior) or master's in computer science/software/data/math; U.S. citizen eligible for Secret clearance; professor recommendation; ability to commute to Scott AFB; coding, debugging, DB/API skills; preferred knowledge of R, Python, SQL, JavaScript; Microsoft Office proficiency.
R, Python, SQL, JavaScript, Microsoft Office
Job PostingView all
1w
Save
Mark Applied
Hide
Junior DevOps Engineer
St. Louis or Springfield
$115k-$125k/yr OnsiteFull Time
D2 Consulting
D2 Consulting: Provides IT engineering and cybersecurity services to federal agencies.
2+ YOETS/SCI clearance required, 2+ years relevant experience, experience with containers (Kubernetes/Docker/OpenShift), GitLab CI/CD, Python/Bash/Shell scripting, on-prem and cloud infrastructure, monitoring, and security practices.
Kubernetes, Docker, OpenShift, GitLab, Python, Bash, Shell, Helm, Jira, Confluence
Job PostingView all
3w
Save
Mark Applied
Hide
SDC Java Software Developer---Staff/Analyst---St. Louis (St. Louis, MO, US, 63105)
St. Louis, Missouri, United States
$55k-$113k/yr HybridFull Time
EY
EY: Global firm providing audit, tax, and professional consulting services.
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
Job PostingView all
1w
Save
Mark Applied
Hide
Software Engineer 1 (Backend UI and AI)
Earth City, Missouri, United States
$86k-$102k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
2+ YOE2–3 years experience, bachelor’s degree or equivalent, proficiency with ReactJS/Next.js/JavaScript/Node.js, frontend state management, CI/CD and DevOps practices, strong communication and problem-solving skills.
ReactJS, Next.js, JavaScript, Node.js, GraphQL, Apollo Client, Axios, Redux, Context API, HTML5, CSS3, SCSS, Styled Components, Webpack, Babel, NPM, JWT, Jenkins, CloudBees, Git, Azure DevOps/TFS, WCAG/ADA Compliance Tools
Job PostingView all
1mo
Save
Mark Applied
Hide
Software Engineer, Senior (Hazelwood, MO, US, 63042)
Hazelwood, Missouri, United States
OnsiteFull Time
FlightSafety International
FlightSafety International: Professional aviation training and flight simulator manufacturing services.
2+ YOEBachelor's in a technical field (or equivalent) with ≥2 years related experience; strong SDLC, Agile/Waterfall, Azure DevOps, Visual Studio, Git, Python/bash/PowerShell/Perl, and advanced math skills; may require security clearance and U.S. Person status.
Microsoft Azure DevOps, Microsoft Visual Studio, Git, bash, PowerShell, Python, Perl
Job PostingView all

Explore Jobs

Expand Your Job Search