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Java Internship Jobs in St Louis, MO (NOW HIRING)

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Java Internship information

See St Louis, MO salary details

$15

$55

$75

How much do java internship jobs pay per hour?

As of Aug 20, 2026, the average hourly pay for java internship in St. Louis, MO is $55.12, according to ZipRecruiter salary data. Most workers in this role earn between $47.69 and $61.68 per hour, depending on experience, location, and employer.

What is a Java internship?

A Java Internship is a temporary position, usually aimed at students or recent graduates, that provides hands-on experience working with Java programming in a real-world environment. Interns typically assist with software development tasks, bug fixing, and sometimes participate in designing and testing Java applications. This role helps individuals gain practical skills, industry knowledge, and professional networking opportunities that can aid in securing a full-time job in software development.

What types of projects do Java interns typically work on, and how do these projects support their learning and professional growth?

Java interns are often assigned to real-world projects such as developing web applications, enhancing existing codebases, or automating testing processes. These projects are designed to provide hands-on experience with Java frameworks like Spring or Hibernate, version control systems, and collaborative development tools. Interns usually work closely with experienced developers, participate in code reviews, and attend team meetings, which helps them gain valuable feedback and understand industry best practices. This environment not only sharpens their technical skills but also exposes them to effective teamwork and agile development methodologies, setting a strong foundation for future career opportunities.

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

To thrive as a Java Intern, you need a solid understanding of Java programming, basic knowledge of object-oriented principles, and enrollment in or completion of a computer science or related degree. Familiarity with IDEs like Eclipse or IntelliJ IDEA, version control systems such as Git, and basic database concepts is often expected. Strong problem-solving skills, eagerness to learn, and effective communication set exceptional interns apart. These skills and qualities enable interns to contribute meaningfully to projects, adapt to team workflows, and accelerate their professional growth.

What is the difference between Java Internship vs Java Developer?

AspectJava InternshipJava Developer
Required CredentialsTypically pursuing or recently completed a degree in Computer Science or related fieldBachelor's degree in Computer Science or related, often with certifications
Work EnvironmentEntry-level, training-focused, often part-time or temporaryFull-time, professional development, project-based
Employer & Industry UsageInternships offered by tech companies, startups, and organizations for trainingFull-time roles in software development companies, IT departments, or tech firms
Common Search & Comparison IntentUnderstanding entry points into Java developmentSeeking full-time Java development roles

In summary, a Java Internship is an entry-level, training-focused position designed for students or recent graduates to gain practical experience. A Java Developer is a full-time professional role requiring more experience and responsibility in developing Java applications.

Is Java still in demand?

Java remains a highly in-demand skill for software development, especially in enterprise applications, Android app development, and backend systems. Many companies seek Java developers with knowledge of frameworks like Spring and experience with cloud environments, ensuring ongoing job opportunities for Java interns and professionals.

What does a Java internship do?

A Java internship involves assisting with software development using Java programming language, often including tasks like coding, debugging, and testing applications. Interns gain experience with development tools, collaborate with teams, and improve their programming skills in a real-world environment.

What cities near St. Louis, MO are hiring for Java Internship jobs?

Cities near St. Louis, MO with the most Java Internship job openings:

Infographic showing various Java Internship job openings in St. Louis, MO as of August 2026, with employment types broken down into 8% Internship, 60% Full Time, 29% Part Time, 1% Temporary, and 2% Contract. Highlights an 81% Physical, 2% Hybrid, and 17% Remote job distribution, with an average salary of $114,656 per year, or $55.1 per hour.

C++ Software Engineer

London Stock Exchange Group

Saint Louis, MO • On-site

$95K - $159K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 26 days ago


Job description

LSEG offers essential platforms, financial data services and trading venues for various clients such as businesses, governments, and investors around the globe.
The real-time market data, indices, analytics, and news services LSEG supplies allows traders and investors understand market conditions and trends. We deliver the infrastructure, data, and analytics that market participants rely on to make confident, informed investment decisions.
LSEG is dedicated to empowering economies and enabling sustainable growth by incorporating environmental, social, and governance (ESG) factors into its operations and offerings.
Within LSEG's Data and Analytics division, the Real-Time Distribution Development team plays a vital role in supporting LSEG's financial data distribution and fanout components.
We have responsibility for the design, implementation and continuous improvements of complex, low latency, high throughput software that makes the LSEG financial data distribution reliable, scalable and geographically resilient. Whether you are passionate about our consistently modernized on-prem enterprise solutions or tackling the challenges on our cloud applications in AWS and Azure, we have a place for you!
Our team thrives on inclusion, innovation, and high performance. Join us, and help shape the future of LSEG's platforms and services!
Job responsibilities:
• Design of software modules; implementation in C++, unit testing, integration testing, performance testing along with software packaging and configuration management.
• Participates in code/design reviews.
• Contributes toward product and internal documentation - technical specifications, software documentation and unit test plans.
• Assists in resolution of field problems as needed
• Partners with Quality Assurance to ensure high quality software, write Robot framework test cases using Python based key words
Qualifications
• 3+ years of computer software development experience
• Experience developing in C++ and/or other Object Oriented programming languages, in a multi-threaded environment and real-time streaming type applications.
• strong working experience and troubleshooting skills in Linux.
• Familiarity with network programming and strong knowledge of networking concepts and protocols(TCP/IP, UDP, multicast).
• Strong written & verbal communication skills
• Experience with Cloud technology (AWS/AZURE) is a plus.
• Experience with Java multithreaded programming is a plus.
Career Stage:
Senior Associate
Compensation/Benefits Information:
LSEG is committed to offering competitive Compensation and Benefits. The anticipated base salary for this position is $95,700 - $159,700.
Please be aware base salary ranges may vary by geographic location, city and state. In addition to our offered base salary, this role is eligible for our Annual Incentive Plan (AIP/"bonus plan"). Target AIP rates will be commensurate with role level and posted career stage. Individual salary will be reflective of job related knowledge, skills and equivalent experience. LSEG roles (excluding internships and part-time roles of less than 20 hours per week) are typically eligible for inclusion in our LSEG Benefits program, which includes offerings of: Annual Wellness Allowance, Paid time-off, Medical, Dental, Vision, Flex Spending & Health Savings Options, Prescription Drug plan, 401(K) Savings Plan and Company match. LSEG's Benefits plan also includes basic life insurance, disability benefits, emergency backup dependent care, adoption assistance commuter assistance etc.
London Stock Exchange Group (LSEG) Information:
Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.
LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.
Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.
Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.
We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.
You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject.
If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.