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Senior Java Engineer Jobs in Florissant, MO (NOW HIRING)

kollasoft

Java/J2EE developer Sr.

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java J2EE Developer in St.Louis,MO Duration: 2-3 Years Contract Need GC or USC only Communication: Present ideas assertively, aggressively and not be easily ignored. * Be articulate, persuasive and ...

kollasoft

Java/J2EE developer Sr.

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java J2EE Developer in St.Louis,MO Duration: 2-3 Years Contract Need GC or USC only Communication: Present ideas assertively, aggressively and not be easily ignored. * Be articulate, persuasive and ...

kollasoft

Java/J2EE developer Sr.

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java J2EE Developer in St.Louis,MO Duration: 2-3 Years Contract Need GC or USC only Communication: Present ideas assertively, aggressively and not be easily ignored. * Be articulate, persuasive and ...

Worky

Senior Software Developer

O Fallon, IL · On-site

$100 - $125/hr

We are seeking a Java Developer with experience developing Web applications to be part of the ... As a Senior Software Developer, the selected individual will work hands‑on with developer and ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

About the Role As a Java Site Reliability Engineer (SRE) within the Mastercard Send team, you will ... Senior SE Skills | Excel] Experience with production support, on-call operations, incident ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

The ideal candidate brings strong software engineering fundamentals, hands-on Java development ... Role As a Senior Software Engineer, you will independently execute key elements of software ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

The ideal candidate brings strong software engineering fundamentals, hands-on Java development ... Role As a Senior Software Engineer, you will independently execute key elements of software ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

About the Role As a Java Site Reliability Engineer (SRE) within the Mastercard Send team, you will ... Senior SE Skills | Excel] • Experience with production support, on-call operations, incident ...

Highbrow LLC

Sr. Software Engineer

Saint Louis, MO · On-site

$125 - $150/hr

Job Title: Sr. Software Engineer Job ID: 2024-12766 Job Location: Morris Plains, NJ (Preferred ... Java, Spark, Delta Lake, Spring Boot, Jenkins, Kafka Job Responsibilities: Design and implement ...

New

1 point system

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

The Sr. Software Engineer opportunity we have in St. Louis, MO. All candidates will be required to take a Glider exam , which is on recorded video and may be reviewed by the client , prior to ...

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Senior Java Engineer information

See Florissant, MO salary details

$10

$57

$79

How much do senior java engineer jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for senior java engineer in Florissant, MO is $57.94, according to ZipRecruiter salary data. Most workers in this role earn between $50.77 and $64.71 per hour, depending on experience, location, and employer.

What is a senior Java engineer?

Senior Java Engineers are experienced software developers who specialize in designing, developing, and maintaining applications using the Java programming language. They often lead development teams, architect solutions, and ensure that software meets both technical and business requirements. Their responsibilities also include code reviews, mentoring junior developers, and optimizing application performance. Typically, they have several years of experience and a deep understanding of Java frameworks and best practices.

What are the key skills and qualifications needed to thrive as a senior Java engineer?

To thrive as a Senior Java Engineer, you need advanced proficiency in Java programming, strong knowledge of software design patterns, and a degree in computer science or related field. Experience with frameworks like Spring, Hibernate, build tools such as Maven or Gradle, and familiarity with cloud platforms and CI/CD systems are typically required. Excellent problem-solving abilities, leadership, and effective communication help you guide teams and collaborate with stakeholders. These skills are crucial for delivering robust, scalable software solutions and mentoring junior engineers in complex development environments.

What are some common challenges senior Java engineers face when working on large-scale enterprise applications?

Senior Java Engineers often encounter challenges such as managing complex codebases, ensuring application scalability, and maintaining high performance under heavy loads. They are also responsible for implementing robust security practices and integrating new technologies without disrupting existing systems. Effective collaboration with cross-functional teams and mentoring junior developers are crucial aspects of the role, as these responsibilities help maintain code quality and project momentum.

What is the difference between Senior Java Engineer vs Java Developer?

AspectSenior Java EngineerJava Developer
Required CredentialsBachelor's in Computer Science, Java certifications (e.g., Oracle Certified Professional)Bachelor's in Computer Science or related field, Java certifications optional
Work EnvironmentDesigning, developing, and maintaining complex Java applications, often in team leadership rolesDeveloping Java applications, focusing on coding and implementation
Industry UsageUsed across finance, tech, and enterprise sectors for large-scale projectsCommonly employed in software development firms, startups, and tech companies

While both roles involve Java programming, Senior Java Engineers typically handle complex system design, mentorship, and project leadership, whereas Java Developers focus more on coding and implementing features. The senior role often requires more experience and certifications, with a broader scope of responsibilities.

What job categories do people searching Senior Java Engineer jobs in Florissant, MO look for?

The top searched job categories for Senior Java Engineer jobs in Florissant, MO are:

What cities near Florissant, MO are hiring for Senior Java Engineer jobs?

Cities near Florissant, MO with the most Senior Java Engineer job openings:

Senior Java Engineer jobs near you

Java Full Stack Engineer

O Fallon, MO • On-site

Brains Technology Solutions Inc
IT Services • 201 - 500 employees
Learn more about Brains Technology Solutions Incexternal

$55 - $58/hr

Contractor

Re-posted 6 days ago

Job description

Job Title

Java Full Stack Engineer

Technology

Java, J2EE, Spring Boot

Employment Type

C2H

Level

Senior (L4)

Work Location (City/State)

O’Fallon, MO (Hybrid onsite 3 days/week)

Travel Locations (%)

Must be able to travel to office as needed

JOB DESCRIPTION:

What You Will Do

  • Contribute to the planning, design, and development of microservices on your team.
  • Build Java microservices that work with Angular and third-party applications
  • Deliver code with exceptional quality and security that operates at scale
  • Participate in code reviews and retrospectives, and submit Pull Requests using Git
  • Collaborate with software engineers, test engineers, TPMs, and PMs
  • Ensure that you use 12-factor app design principles in your development.
  • Ensure that the systems you create comply with Client engineering best practices and governance models, including security, operations, and Enterprise Architecture requirements

Skills and Experience Needed

Required:

  • Experience building applications using Java
  • Extensive experience with Java APIs
  • Experience with web technologies, including HTML, JavaScript and front-end frameworks such as Angular
  • Ability to optimize applications for performance, scalability, and reliability.
  • Solid SQL development knowledge (i.e. PostgreSQL, Oracle, etc.) and able to deliver solutions that leverage them at a massive scale
  • Exposure to automated testing and releasing software in a continuous delivery model using Git
  • Experience working in an Agile team focused on continuous improvement
  • Able to learn and leverage best practices and modern software architecture and collaborate within a team
  • Excellent communication skills with both technical and non-technical people

Desired:

  • Experience working within the commercial card space or corporate banking
  • Strong ability to multi-task, organize, manage, and implement complex projects whether directly or through supervision
  • Able to operate with minimal supervision and able to make informed, well-reasoned decisions independently
  • Experience with PCF

Education:

  • Bachelor’s degree