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Junior Development Jobs in Missouri (NOW HIRING)

Senior Developer

Saint Louis, MO · On-site

$53 - $70/hr

Must be able to mentor junior development team staff and ensure completion of assigned projects by the team. * Bachelor's Degree. * Experience with streaming media and video is beneficial.

Jr. Accountant

Fenton, MO · On-site

$45K - $57K/yr

Nooter/Eriksen is seeking a Jr. Accountant to join our Finance Team. This role is part of a team ... development;Support Project Financial Analysts by assisting with accounts payable processing ...

Jr. Accountant

Fenton, MO · Hybrid

$45K - $57K/yr

Nooter/Eriksen is seeking a Jr. Accountant to join our Finance Team. This role is part of a team ... development; * Support Project Financial Analysts by assisting with accounts payable processing ...

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Junior Development information

What is a junior developer?

Junior Developers are entry-level professionals in software development who are responsible for writing, testing, and maintaining code under the guidance of more experienced developers. They typically work as part of a team, learning best practices and industry standards while contributing to various stages of the software development lifecycle. Junior Developers are expected to have foundational programming skills, a willingness to learn, and the ability to adapt quickly to new technologies.

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

To thrive as a Junior Developer, you need a basic understanding of programming languages, software development principles, and a relevant degree or coding bootcamp certification. Familiarity with version control systems like Git, integrated development environments (IDEs), and debugging tools is typically required. Strong problem-solving abilities, eagerness to learn, and effective communication skills help you collaborate and grow within a team. These skills and qualities are essential for contributing to projects, adapting to new technologies, and progressing in a fast-paced development environment.

What are some common challenges faced by junior developers in their first year on the job?

Junior developers often encounter challenges such as adapting to new codebases, understanding team workflows, and balancing learning with delivering results. It's common to feel overwhelmed by unfamiliar technologies or development tools at first. However, most teams provide mentorship, code reviews, and regular feedback to help juniors grow their skills and confidence. Collaboration with more experienced developers and asking questions are key to overcoming these early hurdles and building a strong foundation for future growth.

How hard is it to get a junior development job?

Securing a junior development position typically requires basic programming skills, familiarity with relevant languages like JavaScript or Python, and a portfolio or projects demonstrating your abilities. Entry-level roles often have lower experience requirements, but competition can be high, so building a strong foundation and gaining practical experience through internships or certifications can improve your chances.

How to get hired as a junior development?

To get hired as a junior developer, candidates should build a solid foundation in programming languages such as Java, Python, or JavaScript, and create a portfolio of projects to demonstrate their skills. Gaining experience through internships, coding bootcamps, or certifications like CompTIA or Microsoft can improve employability. Strong problem-solving abilities, familiarity with version control systems like Git, and good communication skills are also important for entry-level development roles.

What are the most commonly searched types of Development jobs in Missouri?

The most popular types of Development jobs in Missouri are:

What are popular job titles related to Junior Development jobs in Missouri?

For Junior Development jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Junior Development jobs in Missouri look for?

The top searched job categories for Junior Development jobs in Missouri are:

What cities in Missouri are hiring for Junior Development jobs?

Cities in Missouri with the most Junior Development job openings:

Infographic showing various Junior Development job openings in Missouri as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 15% Part Time, and 3% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution.

Application Developer II

Cass Information Systems, Inc.

Bridgeton, MO • On-site

$70 - $90/hr

Other

Re-posted 14 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+.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities.

This employer is required to notify all applicants of their rights pursuant to federal employment laws.

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