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Junior Application Developer Jobs in Missouri (NOW HIRING)

The Timberline Group

Xamarin Developer

Saint Louis, MO · On-site +1

Role Summary The Web Application Developer's responsibilities may include: * Providing team ... Mentor and develop junior team members. What we need you to bring to the table: * Xamarin * . NET 4 ...

AAON, Inc.

Application Engineer III

Parkville, MO · On-site

Mentor and provide guidance to junior sales applications engineers. * Assist in development of application standards, tools, and best practices. * Support new product introduction efforts, including ...

New

Stifel

AI-Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

Leverage AI and automation to scale security operations, vulnerability management, and developer ... Contribute to a strong security engineering culture by mentoring junior engineers, sharing ...

Stifel

AI-Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

Leverage AI and automation to scale security operations, vulnerability management, and developer ... Contribute to a strong security engineering culture by mentoring junior engineers, sharing ...

Stifel

AI-Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

Leverage AI and automation to scale security operations, vulnerability management, and developer ... Contribute to a strong security engineering culture by mentoring junior engineers, sharing ...

teKnoluxion

Junior DevOps Engineer

Saint Louis, MO · On-site

$51.25 - $70.25/hr

Overview Junior DevOps Engineer Springfield, VA OR St. Louis, MO Active TS (SCI eligibility ... Strong understanding of DevOps and software/application development processes * Understanding of ...

Meridian Systematics

DevOps Engineer

Saint Louis, MO · On-site

$93K - $175K/yr

DevOps Engineer (Junior, Mid-Level, Senior) Location: St. Louis, MO Clearance Required: Active Top ... Design, implement, and maintain CI/CD pipelines supporting automated application builds, testing ...

Maverik Oils LLC

Junior Sales Associate

Union, MO · On-site

$40K - $80K/yr

... and application testing as needed Qualifications and Skills * Bachelor's degree in business, Food Science, Chemical Engineering, or a related field preferred but not required. * 0-2 years of ...

Maverik Oils LLC

Junior Sales Associate

Union, MO · On-site

$40K - $80K/yr

... and application testing as needed Qualifications and Skills * Bachelor's degree in business, Food Science, Chemical Engineering, or a related field preferred but not required. * 0-2 years of ...

Maverik Oils LLC

Junior Sales Associate

Union, MO · On-site

$40K - $80K/yr

... and application testing as needed Qualifications and Skills * Bachelor's degree in business, Food Science, Chemical Engineering, or a related field preferred but not required. * 0-2 years of ...

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Junior Application Developer information

See Missouri salary details

$22.5K

$83.5K

$129K

How much do junior application developer jobs pay per year?

As of Aug 13, 2026, the average yearly pay for junior application developer in Missouri is $83,459.00, according to ZipRecruiter salary data. Most workers in this role earn between $62,800.00 and $81,600.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a junior application developer, and why are they important?

To thrive as a Junior Application Developer, you need a solid understanding of programming languages (such as Java, Python, or JavaScript), software development principles, and a relevant degree or equivalent experience. Familiarity with version control systems like Git, integrated development environments (IDEs), and possibly certifications in specific technologies are often required. Strong problem-solving skills, willingness to learn, and effective communication set outstanding candidates apart. These skills and qualities are essential for delivering high-quality code, collaborating on development teams, and adapting to rapidly changing technical requirements.

What are some common challenges faced by junior application developers when transitioning from academic projects to real-world applications?

Junior Application Developers often find that real-world projects involve more complex codebases, stricter deadlines, and frequent collaboration with cross-functional teams compared to academic assignments. They may also encounter challenges in understanding legacy code, adhering to industry best practices, and using version control systems like Git in a team environment. Seeking mentorship, asking questions, and participating in code reviews can help ease this transition and accelerate learning.

What does a junior application developer do?

A Junior Application Developer assists in designing, coding, and testing software applications under the supervision of senior developers. They typically work on writing simple code, fixing bugs, and learning the best practices of software development. Their role often involves collaborating with other team members, participating in code reviews, and continuously improving their programming skills. This position is ideal for individuals who are early in their software development careers and looking to gain hands-on experience in application development.
What are the most commonly searched types of Application Developer jobs in Missouri? The most popular types of Application Developer jobs in Missouri are:
What are popular job titles related to Junior Application Developer jobs in Missouri? For Junior Application Developer jobs in Missouri, the most frequently searched job titles are:
What job categories do people searching Junior Application Developer jobs in Missouri look for? The top searched job categories for Junior Application Developer jobs in Missouri are:
What cities in Missouri are hiring for Junior Application Developer jobs? Cities in Missouri with the most Junior Application Developer job openings:
Junior Application Developer jobs near you
Infographic showing various Junior Application Developer job openings in Missouri as of August 2026, with employment types broken down into 76% Full Time, 18% Part Time, and 6% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $83,459 per year, or $40.1 per hour.

Application Developer II

Cass Information Systems Inc.

Bridgeton, MO • On-site

Full-time

Re-posted 6 days ago

Job description

The Application Developer II is responsible for the development and deployment of technology to meet the needs and requirements of Cass. This position will handle fixing system bugs of simple to medium complexity and will develop system enhancements or assist others on larger more complex enhancements.

PRINCIPAL RESPONSIBILITIES AND DUTIES:

  • Participates in the planning, design, and implementation effort as assigned by the business or IT management.
  • Develops and maintains modules based on technical designs and development standards.
  • Remediates production bugs/defects as assigned.
  • Supports quality assurance testing to confirm that acceptance criteria are met.
  • Recommends changes to the processes, techniques, and technology to improve product quality, work efficiency, system performance and workload balance.
  • Mentors junior development team members when needed.
  • Participates in brainstorming, discussion, and estimation sessions.
  • Performs other duties as assigned.

SKILLS AND ABILITIES REQUIRED:

  • Strong communication skills both written (technical documentation) and verbal (presentations to IT team members and other division teams).
  • Ability to multi-task while still maintaining an attention to detail.
  • Have a solid understanding of telecommunications carrier billing standards and formats.
  • Knowledge of OOP design and patterns.
  • Knowledge of Core, Web, and MVC.
  • Knowledge of Micro Services Architecture.
  • Knowledge of cloud services (Azure preferred).
  • Experience using DevOps and Agile practices.

MINIMUM LEVEL OF PREPARATION AND TRAINING NORMALLY REQUIRED:

    • Bachelor’s degree in computer science or software engineering, or equivalent work experience.
    • 3-5 years of experience as a developer utilizing modern C#, Visual Studio, SQL 2012+.

    APPLICATION PROCESS:

    You can directly apply through Cass's website at https://www.cassinfo.com/careers. Please apply directly to this position via the “Apply” button. You will be required to create an account and provide your resume, contact information and other pertinent employment information. This process typically takes 20 minutes or less. Should we find that you meet the minimum requirement of the position, a member of our recruiting team will be in touch to start the interview process.

    ABOUT OUR COMPANY:

    Cass Information Systems, Inc. (NASDAQ: CASS) is a leading provider of integrated information and payment management solutions. Cass enables enterprises to achieve visibility, control and efficiency in their supply chains, communication networks, facilities, and other operations. Disbursing over $94 billion annually on behalf of its clients, and with total assets of $2.5 billion, Cass is uniquely supported by Cass Commercial Bank. Founded in 1906 and a wholly-owned subsidiary, Cass Commercial Bank provides sophisticated financial exchange services to the parent organization and its clients. Cass is part of the Russell 2000®. More information is available at www.cassinfo.com.

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