Demo

Senior Java Developer

Cynet Systems
St. Louis, MO Contractor
POSTED ON 7/30/2026 CLOSED ON 8/6/2026

What are the responsibilities and job description for the Senior Java Developer position at Cynet Systems?

We are looking for Senior Java Developer for our client in St Louis, MO

Job Title: Senior Java Developer

Job Location: St Louis, MO

Job Type: Contract

Job Overview:

Pay Range $50hr - $55hr

Requirement/Must Have:

  • 6 years of experience in Java/JEE development.
  • Skills in developing applications using multi-tier architecture.
  • Knowledge of Google/AWS cloud.
  • 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, Design Patterns.
  • Skills in Unit testing application using Junit or similar technologies.
  • Good communication skills.
  • Leadership skills.
  • Capability to support QA teams with test plans, root cause analysis and defect fixing.
  • Strong experience in Responsive design, cross browser web applications.
  • Strong knowledge of web service models.
  • Strong knowledge in creating and working with APIs.
  • Experience with Cloud services, specifically on Google cloud.
  • Strong exposure in Agile, Scaled Agile based development models.
  • Familiar with Interfaces such as REST web services, swagger profiles, JSON payloads.
  • Familiar with tools/utilities such as Bitbucket, Jira, Confluence.

Responsibilities:

  • Maintain active relationships with Product Owner to understand business requirements, lead requirement gathering meetings and review designs with the product owner.
  • Own backlog items and coordinate with other team members to develop the features planned for each sprint.
  • Perform technical design reviews and code reviews.
  • Be responsible for prototyping, developing, and troubleshooting software in the user interface or service layers.
  • Perform peer reviews on source code to ensure reuse, scalability and the use of best practices.
  • Participate in collaborative technical discussions that focus on software user experience, design, architecture, and development.
  • Perform demonstrations for stakeholders on project features and sub features, which utilizes the latest Front end and Backend development technologies.

Skills:

  • Java.
  • Microservices.
  • Google Cloud Platform.

Benefits
Our Benefits Include:
  • Medical, Dental, and Vision Insurance
  • 401(k) Retirement Plan
  • Health Savings Account (HSA)
  • Disability Insurance (Short-Term and Long-Term)
  • Life and AD&D Insurance
  • Paid Sick Leave (where required by applicable state or local law)
  • Supplemental Insurance Plans
  • Identity Theft Protection
  • Pet Insurance
  • Employee Wellness Programs
  • Employee Assistance Program (EAP)
  • Career Growth and Professional Development Opportunities
Disclaimer: Benefits eligibility, accrual rates, and usage limits may vary based on employment status, length of service, and work location. Paid Sick Leave is provided in strict accordance with applicable state and municipal mandates. Cynet Systems Inc. reserves the right to modify, amend, or terminate any benefit plans at any time in accordance with applicable laws.

About Cynet Systems

Founded in 2010 and headquartered in the Washington, DC metro area, Cynet Systems Inc. is a leading technology staffing and workforce solutions company serving Fortune 500 companies, government agencies, and enterprise organizations across the United States and Canada. We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and professional staffing, powered by a high-performing recruitment engine operating across North America and Asia.
As a nationally and locally certified Minority Business Enterprise (MBE), Cynet Systems is committed to helping organizations build high-performing teams while empowering professionals to grow rewarding careers. Our organization is certified to ISO 9001, ISO 14001, ISO 27001, and SOC 2 Type II standards, reflecting our commitment to quality, security, operational excellence, and customer success.

Salary : $50 - $55

If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Senior Java Developer?

Sign up to receive alerts about other jobs on the Senior Java Developer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$109,939 - $144,341
Income Estimation: 
$131,745 - $167,716
Income Estimation: 
$144,503 - $184,592
Income Estimation: 
$102,541 - $137,871
Income Estimation: 
$153,752 - $200,235
Income Estimation: 
$120,936 - $155,014
Income Estimation: 
$131,745 - $167,716
Income Estimation: 
$144,503 - $184,592
Income Estimation: 
$102,541 - $137,871
Income Estimation: 
$153,752 - $200,235
This job has expired.
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Cynet Systems

  • Cynet Systems Casa, AZ
  • We are looking for Project Support - Production for our client in Casa Grande, AZ Job Title: Project Support - Production Job Location: Casa Grande, AZ Job... more
  • 9 Days Ago

  • Cynet Systems Phoenix, AZ
  • We are looking for AS400 Technical Lead - Remote / Telecommute for our client in Phoenix AZ . Job Title: AS400 Technical Lead - Remote / Telecommute Job Lo... more
  • 9 Days Ago

  • Cynet Systems Indianapolis, IN
  • We are looking for Sourcing Specialist, Diagnostics Direct Procurement for our client in Indianapolis, IN Job Title: Sourcing Specialist, Diagnostics Direc... more
  • 9 Days Ago

  • Cynet Systems Indianapolis, IN
  • We are looking for Medical Scientific Liaison for our client in Indianapolis IN . Job Title: Medical Scientific Liaison Job Location: Indianapolis IN Job T... more
  • 9 Days Ago


Not the job you're looking for? Here are some other Senior Java Developer jobs in the St. Louis, MO area that may be a better fit.

  • Texas State Library and Archives Commision Lake, MO
  • Role: Java Developer Location: St.Louis,MO Duration: 12 Months Contract Strong Java developer with very good understanding of micro services. Grasp of soft... more
  • 11 Days Ago

  • Veridic Solutions Saint Louis, MO
  • Java Developer Ongoing contract Hybrid schedule- St. Louis, MO need local candidates only Java Developer Web and Mobile Application development team is loo... more
  • 18 Days Ago

AI Assistant is available now!

Feel free to start your new journey!