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Senior Full Stack Java Developer Jobs in Saint Charles, MO

CYNET SYSTEMS

Java Full Stack Developer

Saint Louis, MO · On-site

$50/hr

Java/JEE, Spring, Spring boot, REST/SOAP web services, Hibernate, SQL, Tomcat, Application servers (WebSphere), SONAR, Agile, AJAX, Jenkins. * Skills in UML, application designing/architecture ...

Delan Associates, Inc

Lead Software Engineer

O Fallon, MO · On-site

$120 - $170/hr

A senior-level engineer who combines strong full-stack Java development skills with hands‑on experience building Agentic AI frameworks (MCP + LLMs), while also possessing the analytical and design ...

Jobsbridge

UI Developer

Saint Louis, MO · On-site

$48.50 - $63.25/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. 8-9 Years of experience in UI development 2 Years of minimum experience ...

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See Saint Charles, MO salary details

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

As of Aug 12, 2026, the average hourly pay for senior full stack java developer in Saint Charles, MO is $54.69, according to ZipRecruiter salary data. Most workers in this role earn between $47.55 and $61.35 per hour, depending on experience, location, and employer.

What is a senior full stack Java developer?

Senior Full Stack Java Developers are experienced software professionals who design, develop, and maintain both the front-end and back-end components of web applications using Java and related technologies. They typically work with frameworks such as Spring Boot for the backend and may use JavaScript frameworks like Angular or React for the frontend. In addition to coding, they often lead development teams, make architectural decisions, and ensure best practices are followed throughout the software development lifecycle.

What are the key skills and qualifications needed to thrive as a senior full stack Java developer?

A Senior Full Stack Java Developer needs advanced proficiency in Java, front-end frameworks (such as Angular or React), and a solid understanding of databases, supported by a bachelor’s degree in computer science or related field. Experience with tools like Spring Boot, RESTful APIs, version control systems (e.g., Git), and cloud platforms is typically required, along with relevant certifications. Strong problem-solving, communication, and teamwork skills help developers effectively collaborate and deliver robust solutions. These competencies are crucial for building scalable applications, leading projects, and ensuring efficient development processes.

How much do senior full stack Java developers make?

Senior full stack Java developers typically earn between $100,000 and $150,000 annually, depending on experience, location, and industry. They often possess skills in frameworks like Spring and front-end technologies such as Angular or React, which can influence salary levels.

What are some common challenges senior full stack Java developers face when balancing backend and frontend responsibilities?

Senior Full Stack Java Developers often encounter the challenge of staying up-to-date with both backend Java frameworks and rapidly evolving frontend technologies. Balancing deep expertise in server-side development with proficiency in modern JavaScript frameworks (like React or Angular) can be demanding. Additionally, these professionals often need to effectively prioritize tasks between client and server development while collaborating with specialized frontend or backend team members. Time management, clear communication, and a willingness to learn new tools are essential for success in this multifaceted role.

Is a senior full stack Java developer still in demand?

Senior full stack Java developers remain in high demand due to their expertise in both front-end and back-end development, with skills in frameworks like Spring and Angular. Organizations seek these professionals for building scalable applications, especially in environments emphasizing cloud computing and microservices architecture.
What are popular job titles related to Senior Full Stack Java Developer jobs in Saint Charles, MO? For Senior Full Stack Java Developer jobs in Saint Charles, MO, the most frequently searched job titles are:
What cities near Saint Charles, MO are hiring for Senior Full Stack Java Developer jobs? Cities near Saint Charles, MO with the most Senior Full Stack Java Developer job openings:
Senior Full Stack Java Developer jobs near you
Infographic showing various Senior Full Stack Java Developer job openings in Saint Charles, MO as of August 2026, with employment types broken down into 1% Internship, 84% Full Time, 9% Part Time, 5% Contract, and 1% Nights. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $113,751 per year, or $54.7 per hour.

Sr. Java Full stack Software Engineer

3B Staffing LLC

O Fallon, MO • Hybrid

$116K - $153K/yr

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

Sr. Java Full stack Software Engineer
Location: Hybrid in O'Fallon, Missouri. Local preferred, will consider candidates in neighboring areas
Duration: 6 months listed, possibility of extension
Top 3 Required Skills:
1. Java Full Stack Engineering

  • Java 8+, J2EE, Spring, Hibernate
  • Angular/React front-end development
  • REST/SOAP APIs and enterprise application development
2. Cloud-Native Architecture & DevOps
  • Cloud-Native / AWS or Other Cloud Platforms
  • CI/CD and engineering tools like Jenkins, Maven, Gradle, Chef, and Sonar
3. GenAI / AI-Enabled Engineering
  • Ability to leverage GenAI tools to improve developer productivity
  • Apply AI-assisted coding, testing, documentation, and troubleshooting
  • Explore practical GenAI use cases for modernization, automation, and platform efficiency
Role Overview You will design and build the next-generation Decision Management Platform, the real-time system that scores and approves billions of payment transactions. This is a hands-on role where you will write code, run prototypes, and use AI coding tools every day to ship faster and at higher quality. You will be joining a high-growth team that is actively expanding to meet increasing scale and impact. You will work directly with senior engineers, architects, and product managers to deliver features that make the platform faster, more reliable, and more cost-efficient to run. Key Responsibilities
  • Develop enterprise applications using a Java technology stack with Angular or React as front-end technologies.
  • Participate in gathering and refining business requirements.
  • Ensure software designs align with client's Enterprise Architecture and leverage enterprise services.
  • Ensure product development meets client's business needs.
  • Apply client standard development methodologies, follow technology standards, and ensure projects are appropriately documented.
  • Ensure software and system design support the goal of zero downtime in production.
  • Work closely with business partners on product definition, roadmaps, business case development, and overall team direction.
  • Respond to operational and business concerns related to future programs, projects, or enhancements to ensure consistent delivery of quality services.
  • Support appropriate certifications and compliance requirements, including PCI, GLBA, Safe Harbor, and others.
  • Drive performance engineering of the enterprise software architecture and provide guidance, advice, or training to other application developers.
  • Improve and expand the existing platform by ensuring it is resilient, secure, and scalable.
  • Use AI tools effectively as part of daily development work, including tools such as Claude Code, Copilot, or similar platforms.
All About You
  • Bachelor's degree in information systems, Information Technology, Computer Science, Engineering, or equivalent work experience.
  • More than 7 years of industry experience.
  • Excellent communication skills, with the ability to interact across multiple organizational levels and with internal and external customer groups.
  • Strong analytical and problem-solving abilities, with the ability to quickly adapt to new technologies, methodologies, and systems.
  • High energy, strong attention to detail, and the ability to function independently under pressure with a high degree of initiative and self-motivation.
  • Strong interpersonal and relationship-building skills, with a solid track record of developing internal and external partnerships.
  • Proficiency with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and databases such as Oracle and SQL Server.
  • Experience with SQL and NoSQL databases such as MySQL, PostgreSQL, and MongoDB.
  • Experience with web services (SOAP/RESTful), servers (WebSphere, JBoss, Tomcat), HTML, JavaScript, jQuery, React or Angular, and IDEs such as Microsoft Visual Studio or Eclipse is a plus.
  • Experience with tools such as Maven, Gradle, Jenkins, Chef, and Sonar, as well as methodologies such as Waterfall and Agile.
  • Experience with LLM integration, prompt engineering, and agentic patterns.

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