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Junior Java Software Engineer Jobs in Saint Louis, MO

CYNET SYSTEMS

Java Technical Lead

Saint Louis, MO · On-site

$55 - $60/hr

... applications using Java. * Minimum of 3-5 years of experience building web services and cloud ... junior developers. * Uses object-oriented techniques and software engineering best practices ...

The Giant Bullseye

Senior Java Engineer

Saint Louis, MO

$55.75 - $71/hr

Overview We are looking for a highly skilled Senior Java Engineer to design, develop, and maintain ... quality software solutions * Participate in code reviews, performance optimization, and ...

Equifax, Inc.

Senior Software Engineer

Saint Louis, MO · On-site

$119K - $157K/yr

Bachelor's degree or equivalent experience * 5+ years of software engineering experience * 5+ years experience writing, debugging, and troubleshooting code in mainstream Java, SpringBoot, TypeScript ...

Mastercard, Inc.

$114K - $151K/yr

... • Mentor junior engineers and contribute to knowledge sharing across teams • Evaluate and ... Java, Spring Boot, and Spring Data JPA • Strong foundation in computer science fundamentals ...

Mastercard, Inc.

$114K - $151K/yr

... junior engineers • Deliver department and external presentations sharing results with stakeholders All About You • Strong software engineering experience writing applications using Java Spring ...

Mastercard, Inc.

$91K - $124K/yr

What You'll Do Software Development • Design, develop, test, and maintain Java/Spring Boot ... junior engineers where appropriate. Required Qualifications • Bachelor's degree in Computer ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site +1

$114K - $151K/yr

... junior engineers Deliver department and external presentations sharing results with stakeholders All About You Strong software engineering experience writing applications using Java Spring Boot ...

Mastercard, Inc.

$114K - $151K/yr

... junior team members through all phases of the software development lifecycle, and ensuring ... using Java, Spring boot, Kafka, C++, JNI or similar technologies. • BS in Computer Science or ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... junior team members through all phases of the software development lifecycle, and ensuring ... Experience with Java/J2EE Experience with cryptographic primitives, concepts, and protocols Good ...

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Junior Java Software Engineer information

See Saint Louis, MO salary details

$59.3K

$103.9K

$156.5K

How much do junior java software engineer jobs pay per year?

As of Aug 8, 2026, the average yearly pay for junior java software engineer in Saint Louis, MO is $103,858.00, according to ZipRecruiter salary data. Most workers in this role earn between $73,400.00 and $103,500.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a junior Java software engineer, and why are they important?

To thrive as a Junior Java Software Engineer, you need a solid understanding of Java programming, object-oriented principles, data structures, and typically a bachelor’s degree in computer science or a related field. Familiarity with version control systems like Git, build tools such as Maven or Gradle, and experience with IDEs like IntelliJ IDEA or Eclipse are common technical requirements. Strong problem-solving, eagerness to learn, and effective teamwork are standout soft skills in this role. These skills ensure you can write reliable code, collaborate efficiently, and adapt to evolving technical challenges in software development projects.

What is the difference between Junior Java Software Engineer vs Java Developer?

AspectJunior Java Software EngineerJava Developer
Required CredentialsTypically a bachelor's degree in Computer Science or related field; some certifications like Oracle Java CertificationSimilar credentials; often holds Java certifications and a degree in a related field
Work EnvironmentEntry-level position in development teams, often under supervision, focusing on coding and testingCan be entry to mid-level, involved in designing, coding, and maintaining Java applications
Employer & Industry UsageUsed across tech companies, startups, and corporate IT departmentsCommonly used in software development firms, tech companies, and enterprise environments

While both roles involve Java programming, a Junior Java Software Engineer typically focuses on learning and supporting development tasks under supervision, whereas a Java Developer may have more responsibility in designing and implementing Java applications. The roles often overlap, but the engineer role emphasizes entry-level growth, while the developer role can involve more independent work.

What does a junior Java software engineer do?

A Junior Java Software Engineer is typically responsible for assisting in the development, testing, and maintenance of software applications using the Java programming language. They work under the guidance of more experienced engineers to write code, fix bugs, and contribute to team projects. Junior engineers also learn best practices in software development, participate in code reviews, and continuously improve their technical skills. Their role often includes collaborating with other developers, designers, and quality assurance teams to deliver high-quality software solutions.

What kinds of projects or tasks can a junior Java software engineer expect to work on during their first year?

As a Junior Java Software Engineer, you can expect to work on tasks such as fixing bugs, writing unit tests, and developing small features under the guidance of more experienced team members. You'll likely contribute to code reviews, participate in daily stand-ups, and collaborate closely with QA engineers and front-end developers. Over time, you may gradually take on more complex assignments, such as designing modules or integrating third-party APIs. This hands-on experience helps build your technical skills and deepen your understanding of the software development lifecycle.
What are the most commonly searched types of Java Software Engineer jobs in Saint Louis, MO? The most popular types of Java Software Engineer jobs in Saint Louis, MO are:
What are popular job titles related to Junior Java Software Engineer jobs in Saint Louis, MO? For Junior Java Software Engineer jobs in Saint Louis, MO, the most frequently searched job titles are:
What job categories do people searching Junior Java Software Engineer jobs in Saint Louis, MO look for? The top searched job categories for Junior Java Software Engineer jobs in Saint Louis, MO are:
What cities near Saint Louis, MO are hiring for Junior Java Software Engineer jobs? Cities near Saint Louis, MO with the most Junior Java Software Engineer job openings:
Junior Java Software Engineer jobs near you
Infographic showing various Junior Java Software Engineer job openings in Saint Louis, MO as of August 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $103,858 per year, or $49.9 per hour.

Java Technical Lead

CYNET SYSTEMS

Saint Louis, MO • On-site

$55 - $60/hr

Contractor

Medical, Dental, Vision, Life, Retirement

Posted 8 days ago

Job description

Job Overview:

Pay Range $55hr - $60hr

Requirement/Must Have:

  • Bachelor's degree in computer science, information technology or equivalent.
  • Minimum of 6-8 years of strong application development experience in designing highly scalable and available systems.
  • Minimum of 6-8 years of experience in architecting & developing web-based transactional applications using Java.
  • Minimum of 3-5 years of experience building web services and cloud applications using Azure, AWS, or other cloud platforms.

Responsibilities:

  • Creates and executes development plans as well as revises as appropriate to meet changing needs and requirements.
  • Participates in the gathering and reviewing of business requirements and translating these into functional/technical designs.
  • Leads and coordinates the design, development, implementation, and support of application or product.
  • Develops detailed technical analysis and design specifications based on functional requirements.
  • Facilitates code reviews and mentors junior developers.
  • Uses object-oriented techniques and software engineering best practices including design review, code review, unit-testing, and re-factoring.
  • Easily recognizes system deficiencies and implements effective solutions.
  • Leads daily standup with team to review the status of team members and address issues as appropriate.
  • Participates in the development of code for Java software applications.
  • Researches technical solutions to business problems.
  • Follows agile best practices and maintains/improves work of the agile team.
  • Follows technology trends and guides team to learn and adopt new technologies.

Nice to Have:

  • Experience with Agile software development methodologies.
  • Experience with Continuous Delivery concepts and technology.
  • Experience with RESTful Web Service Design.
  • Experience with Angular JS (Controller, Services, Routing).
  • Experience with Spring Data.
  • Strong expertise in Web Services, REST, Cloud platform (AWS, GCP).
  • Strong design, development and architecture experience in Cloud Services, Micro Services, Web Services and hands-on experience in SaaS enabled solutions.
  • Knowledgeable about securing an end-to-end distributed system.

Skills:

  • Eclipse.
  • Maven.
  • GIT.
  • Docker.
  • Pivotal CF.
  • Bootstrap.
  • Spring Cloud.
  • Spring Boot.
  • Liferay.
  • Tomcat.

Education and Experience:

  • The successful candidate should demonstrate innovation, constant learning, self-motivation and effective team participation.
  • Good communication and interpersonal skills are required.
  • The candidate should demonstrate a willingness to share knowledge, excellent listening skills and strong analytical skills.
  • The candidate must be able to work effectively under project and daily deadlines.

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.
Cynet Systems logo

About Cynet Systems

Sourced by ZipRecruiter

Cynet Systems Inc is a staffing and recruiting corporation nestled in Ashburn, VA, USA. Established in 2010, the company operates within the Information Technology and Services sector, specializing in providing effective workforce solutions to different business needs, including IT consulting, direct hire, and contract staffing services. Through the years, Cynet Systems has built an impressive portfolio, going beyond borders and expanding its operations internationally in Canada and India. Rooted in its core values of teamwork, leadership, and commitment, Cynet Systems helps businesses unlock their full potential by providing versatile and competent professionals that perfectly align with their needs. Fueled by their unwavering mission to deliver top-tier talent to businesses worldwide, Cynet Systems garnered various recognitions including SIA's fastest-growing staffing firms and Best Place to Work in Virginia for 2019.

Industry

It services

Company size

501 - 1,000 Employees

Headquarters location

Sterling, VA, US

Year founded

2010

Social media

Twitter

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