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Java Programmer Salaries Jobs in O Fallon, MO (NOW HIRING)

Leidos

Mid-Level Backend Software Engineer

Saint Louis, MO · On-site

$87K - $157K/yr

Design, develop, test, and maintain backend application components using Java or Python * REST API ... salary. Additional factors considered in extending an offer include (but are not limited to ...

Leidos

Mid-Level Backend Software Engineer

Saint Louis, MO · On-site

$87K - $157K/yr

Design, develop, test, and maintain backend application components using Java or Python * REST API ... salary. Additional factors considered in extending an offer include (but are not limited to ...

Leidos

Mid-Level Backend Software Engineer

Hazelwood, MO · On-site

$87K - $157K/yr

Design, develop, test, and maintain backend application components using Java or Python * REST API ... salary. Additional factors considered in extending an offer include (but are not limited to ...

Leidos

Mid-Level Backend Software Engineer

Bridgeton, MO · On-site

$87K - $157K/yr

Design, develop, test, and maintain backend application components using Java or Python * REST API ... salary. Additional factors considered in extending an offer include (but are not limited to ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

... Java code, databases, middleware, and vendor software to identify performance bottlenecks and ... The base salary offered may vary depending on multiple factors, including but not limited to ...

GDIT

Cloud Engineer

Saint Louis, MO · On-site

$125K - $170K/yr

Python, Ruby, or Java) * Experience with Go programming language * Familiarity with HTML, CSS ... Rather, salary will be set based on experience, geographic location and possibly contractual ...

Ameren Services

Digital Co-op

Saint Louis, MO · Hybrid

$21 - $30/hr

Programming & scripting languages (e.g. .NET, SQL, COBOL, Java, C#, typescript, Java script, HTML ... salary offered. $21.00 - $30.00 If end date is listed, the posting will come down at 12:00 am on ...

Ameren Services

Digital Co-op

Saint Louis, MO · On-site

$21 - $30/hr

Programming & scripting languages (e.g. .NET, SQL, COBOL, Java, C#, typescript, Java script, HTML ... salary offered. $21.00 - $30.00 If end date is listed, the posting will come down at 12:00 am on ...

AMS Ameren Services

Digital Co-op

Saint Louis, MO · Hybrid

$21 - $30/hr

Programming & scripting languages (e.g. .NET, SQL, COBOL, Java, C#, typescript, Java script, HTML ... salary offered. $21.00 - $30.00 If end date is listed, the posting will come down at 12:00 am on ...

D2 Technical Services

AWS Cloud Engineer

Saint Louis, MO · On-site

$130 - $140K/hr

Python, Ruby, or Java) * Experience with Go programming language * Familiarity with HTML, CSS ... The salary range for this position is typically $130-$140k. This does not guarantee a specific ...

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Java Programmer Salaries information

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$34

$51

$65

How much do java programmer salaries jobs pay per hour?

As of Sep 13, 2026, the average hourly pay for java programmer salaries in O Fallon, MO is $51.62, according to ZipRecruiter salary data. Most workers in this role earn between $44.28 and $58.70 per hour, depending on experience, location, and employer.

What is the difference between Java Programmer Salaries vs Java Developer Salaries?

AspectJava Programmer SalariesJava Developer Salaries
Required CredentialsTypically a bachelor's degree in computer science or related field; certifications like Oracle Java CertificationSimilar credentials; often holds certifications like Oracle Java Certification or related developer certifications
Work EnvironmentOften in software development teams, coding, testing, and debuggingInvolved in designing, developing, and maintaining Java applications, often with more project management responsibilities
Employer & Industry UsageUsed across IT companies, startups, and corporate tech departmentsCommon in software firms, enterprise IT, and application development companies

While both roles require similar skills and certifications, Java Developers typically have broader responsibilities in designing and managing Java applications, often commanding higher salaries compared to Java Programmers who focus more on coding and testing tasks.

Are Java programmers still in demand?

Java programmers remain in demand due to the language's widespread use in enterprise applications, Android development, and backend systems. Skills in Java, along with knowledge of frameworks like Spring and experience with cloud platforms, enhance job prospects in this field.

How much do Java programmers make?

Java programmers' salaries vary based on experience, location, and skill level, but typically range from $70,000 to $120,000 annually in many regions. Senior developers with specialized skills or certifications can earn higher salaries, especially in competitive markets or with expertise in frameworks like Spring or tools like Git.

What job categories do people searching Java Programmer Salaries jobs in O Fallon, MO look for?

The top searched job categories for Java Programmer Salaries jobs in O Fallon, MO are:

What cities near O Fallon, MO are hiring for Java Programmer Salaries jobs?

Cities near O Fallon, MO with the most Java Programmer Salaries job openings:

Java Programmer Salaries jobs near you
Infographic showing various Java Programmer Salaries job openings in O Fallon, MO as of August 2026, with employment types broken down into 1% As Needed, 86% Full Time, and 13% Part Time. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution, with an average salary of $107,365 per year, or $51.6 per hour.

Mid-Level Backend Software Engineer

Saint Louis, MO • On-site

Leidos
IT Services • 10K+ employees
Learn more about Leidosexternal

$87K - $157K/yr

Full-time

Re-posted 29 days ago

Leidos rating

8.3

Company rating: 8.3 out of 10

Based on 154 frontline employees who took The Breakroom Quiz

Job description

If you've been building your skills in backend development, objectoriented programming, and missiondriven engineering, and you're ready for work that actually moves the needle, this is the kind of opportunity cleared engineers pursue when they want to grow while making real impact. If you take pride in your craft, enjoy solving meaningful technical problems, and want your work to support a mission with visibility at senior levels, you'll thrive here.

We're hiring a Backend Software Engineer to support a highvisibility, datadriven application used across the organization for analytics and reporting. You'll help build and maintain core backend services, develop RESTful APIs, support datadriven functionality, and contribute to ongoing system enhancements within a Linuxbased environment. Your work will directly support system reliability, performance, and data accuracy for mission stakeholders. Our primary development team operates out of Gaithersburg, MD, but we also support onsite engineers in Chantilly, VA, Alexandria, VA; Aurora, CO; St. Louis, MO; and Tucson, AZ, giving top talent multiple paths to join the mission.

And while the requisition requirements may seem standard fare, the position is not; as it will join a high performing team that is changing the way digital engineering and mission operations intelligence is enabled for our customer.

Why This Role Stands Out

  • High Impact: Your work supports a widely used application that drives realtime decisionmaking

  • High Visibility: Collaborate with engineering teams and mission stakeholders across programs

  • Career Growth: Build deeper expertise in backend development, API design, and scalable systems

  • Challenging Work: Contribute to complex backend features - not routine maintenance tasks

Essential Responsibilities

  • Backend Development:Design, develop, test, and maintain backend application components using Java or Python

  • REST API Development:Develop and maintain RESTful services to support application functionality and system integrations

  • Object-Oriented Programming:Apply object-oriented design principles to build scalable and maintainable systems

  • Database Development:Write and modify SQL queries to support application functionality and data retrieval

  • Data Source Collaboration: Collaborate with internal and external teams to understand data sources, formats, and access methods, and support integration into backend systems

  • Linux Environments:Develop and troubleshoot applications within Linux-based environments

  • Data Processing & Business Logic:Implement backend logic for data transformation, processing, and system workflows

  • Bug Fixing & Enhancements:Identify, debug, and resolve application-level defects and performance issues

  • Code Quality:Follow coding standards, participate in code reviews, and support documentation efforts

Basic Qualifications

  • Bachelor's degree in Computer Science, Software Engineering, or a related field with 4-8 years of experience; or a Master's degree with 2-6 years of experience

  • US Citizenship

  • Active TS/SCI with the ability to successfully pass a Polygraph

  • Professional experience developing objectoriented applications in Java or Python

  • Handson experience building and maintaining RESTful APIs

  • Basic to moderate experience with SQL capability, including writing queries and working with relational databases

  • Working knowledge of Linuxbased environments

  • Ability to work independently on defined tasks within established technical frameworks and deliver reliable results

Preferred Qualifications

  • Experience withApache Airflow or similar workflow orchestration technologies

  • Experience withSpring Boot, Django, or similar backend frameworks

  • Exposure toCI/CD pipelines (GitLab, Jenkins, etc.)

  • Familiarity withcontainerization (Docker, OpenShift)

  • Exposure tocloud environments (AWS or Azure)

  • Experience working inAgile development environments

#NSBA

#MARU

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:August 28, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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About Leidos

Sourced by ZipRecruiter

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable practices. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community.

Industry

It services

Company size

10,000+ Employees

Headquarters location

Reston, VA, US

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