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Full Stack Java Developer Jobs in O Fallon, IL (NOW HIRING)

DataAnnotation

Full Stack Developer

Saint Louis, MO · Remote

$40 - $75/hr

As a member of DataAnnotation's coding team, you'll be part of a growing community of over 100,000 professionals -- including front-end, back-end, full-stack, machine learning, and other engineers ...

Stereotaxis

Full Stack Developer

Saint Louis, MO · On-site

The primary role of the Full Stack Developer is to produce scalable software solutions as a part of a cross-functional team that's responsible for the full software development life cycle, from ...

Gemini

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Java Developer Location: St.Louis, MO - Inperson Interview Job Type: Full Time Only OPT EAD, CPT ... Full Name: Current Location: Contact Details: E-Mail ID: Availability Status: Willing to Relocate:

Gemini

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St.Louis, MO - Inperson Interview Job Type: Full Time Only OPT EAD, CPT ... Full Name: Current Location: Contact Details: E-Mail ID: Availability Status: Willing to Relocate:

Atria Group LLC

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Required Skills: 5+ years advanced computer programming skills in Java, Java Servlet, Javabean, EJB ... full life-cycle software applications development (i.e., design, construction, testing, and ...

The Timberline Group

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

The Timberline Group

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

Atria Group LLC

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Unigroup is in need of a senior Java developer. They will be part of a 10+ person team developing on a large rewrite of their enterprise system along with smaller projects as well. This individual ...

Pyramid IT

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Java Developer Location - St. Louis, MO Duration: Long term contract Work Authorization status : US Citizen & Green card only Mandatory Skills: J2EE (Java, JSP, Servlets, Filters, Listeners, JSTL, EL ...

Nomad eCommerce

Full Stack Developer

Saint Louis, MO · On-site

$70K - $90K/yr

At Nomad, our Core Developers are responsible for building and maintaining the foundational systems that power our ecommerce platform and ERP integrations. This is not just feature work-this role ...

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Full Stack Java Developer information

See O Fallon, IL salary details

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How much do full stack java developer jobs pay per hour?

As of May 30, 2026, the average hourly pay for full stack java developer in O'Fallon, IL is $54.18, according to ZipRecruiter salary data. Most workers in this role earn between $47.07 and $60.77 per hour, depending on experience, location, and employer.

What Is a Full Stack Java Developer?

A full stack Java developer is a web developer that uses the Java language in the development of the entire technology stack of a web-based application. The job duties of a full stack Java developer are to create both front-end components, such as user interfaces and back-end components, such as application code and databases. As a full stack Java developer, you must understand how the entire technology stack functions as a whole and have deep expertise of each component. Java is a computer programming language that has become one of the most popular for web application development.

What are the key skills and qualifications needed to thrive as a Full Stack Java Developer, and why are they important?

To thrive as a Full Stack Java Developer, you need strong proficiency in Java, front-end frameworks (such as Angular or React), back-end technologies, and a solid understanding of databases, often supported by a degree in computer science or a related field. Familiarity with version control systems like Git, build tools such as Maven or Gradle, and knowledge of Spring Boot or similar frameworks are typically required, along with relevant certifications. Effective communication, problem-solving abilities, and adaptability are standout soft skills in this role. These skills and qualities are essential to deliver robust, user-friendly applications and to collaborate efficiently across the software development lifecycle.

What are the typical challenges Full Stack Java Developers face when working on cross-functional teams?

Full Stack Java Developers often collaborate with front-end designers, back-end engineers, and QA specialists, which can lead to challenges in aligning technical requirements, timelines, and coding standards. Navigating different priorities and communication styles is common, especially when integrating new features or resolving bugs that span both client and server sides. Success in this environment requires flexibility, proactive communication, and a willingness to quickly adapt to shifting project needs or technologies.

What is the difference between Full Stack Java Developer vs Backend Java Developer?

AspectFull Stack Java DeveloperBackend Java Developer
Required SkillsJava, front-end (HTML, CSS, JavaScript), frameworks like Angular/React, databasesJava, server-side frameworks (Spring, Hibernate), databases, APIs
Work EnvironmentDevelops both client and server-side applications, often in agile teamsFocuses on server-side logic, APIs, and database integration
CertificationsJava certifications, full stack development coursesJava certifications, backend-specific courses
Industry UsageStartups, tech companies, full stack rolesEnterprise applications, backend services, API development

Full Stack Java Developers work on both front-end and back-end components, requiring a broader skill set. Backend Java Developers focus solely on server-side logic and database integration. The choice depends on your interest in full application development versus specialized backend work.

More about Full Stack Java Developer jobs
What cities near O'Fallon, IL are hiring for Full Stack Java Developer jobs? Cities near O'Fallon, IL with the most Full Stack Java Developer job openings:
Full Stack Java Developer jobs near you
Full Stack Software Engineer

Full Stack Software Engineer

Reinventing Geospatial, Inc. (RGi)

Saint Louis, MO • On-site

Full-time

Medical, Dental, Retirement, PTO

Posted 8 days ago

Job description

Reinventing Geospatial (RGi) is a leading expert in geospatial solutions for Defense, Intelligence, and Federal clients. We enhance situational awareness for soldiers and analysts by integrating software development with geospatial intelligence. Our projects range from data collection to advanced deep learning, leveraging tools like Python, Java, and ArcGIS.

We don't just fill roles we build teams of high performers and leaders who make an immediate impact. At our core, we're driven by innovation and powered by people who work at the intersection of passion and performance. Here, you'll collaborate with bold thinkers, leverage cutting edge technology, and tackle meaningful challenges from day one.

Our culture is defined and anchored by three pillars:

Energy: We bring passion, purpose, and urgency to our work.
Edge: We take initiative, embrace growth, and step outside our comfort zone.
Execution: We get things done smartly, decisively, and with real results.

If you're the kind of person who leads with initiative, thrives in a fast-paced environment, and is eager to create real impact, we want you on our team.

Clearance:
Active Top Secret clearance with an ability to obtain SCI access and willingness to obtain CI Polygraph
US Citizenship Required 

*This job posting is for a potential upcoming opening, and we encourage interested candidates to apply for future consideration.
As a Full Stack Software Engineer, you will...
  • Develop, deploy, and maintain cloud-based services using AWS Lambda, EC2, and other core AWS services.
  • Write and maintain code in C#, Java, JavaScript/TypeScript, Python, and Shell scripting.
  • Create, document, and manage new and existing functionality in GitLab repositories.
  • Apply DevOps practices and tools to deliver new features within an Agile environment.
  • Participate in Agile ceremonies (standups, sprint planning, increment planning) using Jira and Confluence.
  • Perform system administration and modify existing GOTS code to integrate open-source software solutions into web applications.
  • Design and implement APIs and database integrations that interact with Redux and React frameworks.
  • Integrate open-source packages for data visualization and data filtering.
  • Ensure code quality by applying unit testing and build testing best practices across all development efforts.
  • Collaborate with team members to assess tickets, test functionality, and deliver features that meet User Story Acceptance Criteria.
Full Stack Software Engineer Qualifications...
  • Requires BS degree and 4+ years of prior relevant experience or Masters with 2+ years of prior relevant experience.
  • Must have an active Top Secret to be considered and ability to obtain TS/SCI clearance prior to start and willingness and ability to obtain a Polygraph
  • Minimum 3 years of experience with REACT or modern JavaScript framework.
  • Minimum 3 years of experience with Python, C# development framework
  • At least 3 years of experience with unit testing, continuous integration tools, and Gitlab version control
  • Proactive self-starter demonstrates a positive, willing attitude and excellent oral and written communication skills.
  • Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment.
  • Organizational Skills: Can plan and prioritize work. Follows tasks to their logical conclusion and makes sure that everything has been done to the right standard. Good attention to detail.
  • Communications: Ability to communicate clearly and efficiently to team members and clients, verbally and in writing. Able to present ideas in a variety of ways depending upon audience and context.
Additional Skills We'd Like to See:
  • AWS Developer Solutions Mindset
  • At least 3 years of experience with Linux and/or Windows system administration
  • At least 2 years of experience with DoD Aeronautical Datasets
  • At least 1 year of experience with AWS cloud formation templates
  • At least 1 year of experience with Node, NPM, Swashbuckle, REST API, Sass
  • AWS Solutions, Developer, DevOps certification
  • Team Collaboration tools (Jira, Confluence)
  • DOD 8570 Compliant Certification (Sec+)
Who we are:
Reinventing Geospatial, Inc. (RGi) is a fast-paced small business that has the environment and culture of a start-up, with the stability and benefits of a well-established firm. We solve complex problems within geospatial software development and national defense to make an Immediate Impact for our nation's soldiers and analysts.

We pride ourselves on giving employees an exceptional life experience, where creativity thrives, and challenges are simply part of the fun. We provide truly excellent benefits, including:

        100% paid employee healthcare & dental insurance
        Paid parental leave
        401k with matching
        Escalating vacation time
        Referral bonuses
        Tuition reimbursement
        Professional development training
        Free beverages and snacks
        Weekly catered lunches and breakfast on Fridays
 
Grow to be our next leader:
At RGi, fostering a strong and organic corporate culture is paramount and serves as a compass on the decisions we make and how we operate the company. We believe our culture of camaraderie, innovation, and collaboration reflects the caliber of our employees and their dedication to the mission of providing quality software to our customers. As such, we want our employees to feel empowered to seek growth and leadership opportunities within the company and position us to maintain our culture as we grow. RGi provides opportunities, resources, training, and mentorship to all our employees to let them take control of their careers and become a leader or a crucial member of our company. If this is what you are looking for in a company, then you are what we are looking for in an employee.

Reinventing Geospatial, Inc. is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, sex, national origin, age, veteran status, disability, or any other protected class. U.S. Citizenship is required for all positions.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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