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Junior Python Developer Jobs in O Fallon, MO (NOW HIRING)

Deloitte

Automation Engineer

Saint Louis, MO · Hybrid

Evaluate, select, and implement Python libraries, testing tools, and supporting frameworks to ... Document automation architecture, processes, and operating procedures, while mentoring junior ...

Nimble Solutions

Data Engineer

Chesterfield, MO · On-site

$113K - $136K/yr

... Python or Scala code for complex transformations and data processing • Support Power BI and ... Maintain 99.5%+ pipeline uptime; mentor junior engineers; drive architectural improvements for ...

Nimble Solutions

Data Engineer

Chesterfield, MO · On-site +1

$113K - $136K/yr

... Python or Scala code for complex transformations and data processing • Support Power BI and ... Maintain 99.5%+ pipeline uptime; mentor junior engineers; drive architectural improvements for ...

Deloitte

Senior Automation Engineer

Saint Louis, MO · Hybrid

$101K - $132K/yr

Evaluate, select, and implement Python libraries, testing tools, and supporting frameworks to ... Document automation architecture, processes, and operating procedures, while mentoring junior ...

Safety National

Analytics Engineer II

Saint Louis, MO · On-site

... junior team members and driving technical excellence across projects. Qualifications: Education ... Strong Python programming skills * Experience designing scalable data models * Experience building ...

Navstar

Software Engineer

Saint Louis, MO

Guide and mentor junior and mid-level engineers, enforce code quality, and lead peer reviews ... Python, Java, or JavaScript and Go * Front-end and Back-end Frameworks: React, Angular, Vue.js ...

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All JobsJunior Python Developer JobsJunior Python Developer Jobs in O'Fallon, MO

Junior Python Developer information

See O Fallon, MO salary details

$22.5K

$83.2K

$128.6K

How much do junior python developer jobs pay per year?

As of Jun 21, 2026, the average yearly pay for junior python developer in O'Fallon, MO is $83,235.00, according to ZipRecruiter salary data. Most workers in this role earn between $62,700.00 and $81,400.00 per year, depending on experience, location, and employer.

What is a Junior Python Developer job?

A Junior Python Developer is an entry-level software developer who specializes in writing, testing, and maintaining code using the Python programming language. They typically work under the guidance of senior developers and assist in building applications, fixing bugs, and improving performance. Their responsibilities may include writing scripts, working with databases, and integrating third-party services. Strong problem-solving skills, knowledge of Python frameworks like Django or Flask, and familiarity with version control systems like Git are often required. Junior developers are expected to learn quickly and contribute to the development team while gaining hands-on experience.

What are the key skills and qualifications needed to thrive in the Junior Python Developer position, and why are they important?

To thrive as a Junior Python Developer, you need a solid foundation in Python programming, an understanding of computer science fundamentals, and often a relevant degree or coursework. Familiarity with version control systems like Git, basic experience with web frameworks such as Flask or Django, and knowledge of databases are commonly expected, while certifications like PCEP can be advantageous. Attention to detail, a willingness to learn, effective problem-solving, and strong communication skills are essential soft skills for this role. These competencies ensure you can contribute efficiently to software development projects, adapt to new challenges, and collaborate well within a development team.

What are the typical daily responsibilities of a Junior Python Developer?

As a Junior Python Developer, your daily tasks may include writing and testing code, fixing bugs, and participating in code reviews alongside more experienced developers. You'll often work on modules or features under the guidance of senior team members, attend stand-up meetings, and update project documentation as needed. Collaboration with frontend developers, QA testers, and project managers is common, especially when integrating systems or implementing new features. Over time, you can expect to take on more complex tasks and gradually build your expertise through mentorship and hands-on project work.

What are the most commonly searched types of Python Developer jobs in O'Fallon, MO? The most popular types of Python Developer jobs in O'Fallon, MO are:
What are popular job titles related to Junior Python Developer jobs in O'Fallon, MO? For Junior Python Developer jobs in O'Fallon, MO, the most frequently searched job titles are:
What cities near O'Fallon, MO are hiring for Junior Python Developer jobs? Cities near O'Fallon, MO with the most Junior Python Developer job openings:
Junior Python Developer jobs near you
Infographic showing various Junior Python Developer job openings in O'Fallon, MO as of June 2026, with employment types broken down into 77% Full Time, 9% Part Time, 5% Temporary, and 9% Contract. Highlights an 96% In-person, and 4% Remote job distribution, with an average salary of $83,235 per year, or $40 per hour.
Test Systems Engineer (Senior) #800

Test Systems Engineer (Senior) #800

Allen Integrated Solutions

Saint Louis, MO • On-site

Full-time

Posted 16 days ago

Job description

Test Systems Engineer (Senior)
Location: Springfield, VA
Clearance: Active TS/SCI Required
Responsibilities
Senior-level Test Systems Engineers assist in leading Application, System and Integration Testing teams performing test and evaluation across the National System of Geospatial-intelligence (NSG), Allied System of Geospatial-intelligence (ASG) and Federal Agencies to ensure timely and accurate GEOINT.
Duties include:
  • Guides Mid-level and Junior-level system engineers performing test and evaluation across the National System of Geospatial-intelligence (NSG), Allied System of Geospatial-intelligence (ASG) and Federal Agencies.
  • Performs testing of applications and application programming interfaces (APIs) in DevOps pipelines utilizing quality assurance measures established by the government and industry best practices.
  • Performs independent integration testing on the system software or hardware to determine the system's compliance with specified requirements.
  • Plans and executes manual tests, and automated test scripts using scripting and programming languages.
  • Supports technical investigations for defects discovered during test activities.

Qualifications
Required:
  • Bachelor's degree or higher in Engineering, Computer Science, Information Technology, Management Information Systems, or related STEM degree program, or 12+ years of experience as a Test Systems Engineer.
  • 12+ years of experience with test management and defect tracking tools.
  • Experience with three or more of the following; JMeterand, Jenkins, Docker, Postman, Swagger, Nexus, Apigee or GitHub/GitLab (or equivalent software packages), Java, Bash, Curl, XML, JSON, SQL, Python, Javascript, and AWS and C2S.
  • Experience with traditional, Agile, and DevOps development practices and associated testing strategies.
  • TS/SCI clearance adjudication or ability to obtain SCI and pass a polygraph.

Desired:
  • Master's degree in Computer Science, Information Technology, Management Information Systems, or related STEM degree program.
  • Working knowledge of Model Based Systems Engineering, processes, tools and languages.
  • Working knowledge of Software Development Frameworks.

Apply