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Junior Python Developer Jobs in Saint Charles, MO

GRVTY

Senior Data Scientist

Saint Louis, MO · On-site

You will leverage senior-level Python programming skills to build production-ready tools, automate ... Experience mentoring junior data scientists or leading technical modernization initiatives.

Merck Group

Staff Software Engineer

Saint Louis, MO · On-site

$110K - $165K/yr

  • Medical

  • Retirement

  • PTO

Mentor Junior-level engineers into strong AI engineers; Employ AI Native development skills to ... Design, develop, and maintain scalable Python applications and backend services. * Build systems ...

Omni Federal

Software Developer Lead

Saint Louis, MO · On-site

$112K - $141K/yr

Experience with Python (as a development language) for processing of geospatial data * Familiarity ... Mentoring Mid and Junior engineers and removing roadblocks. Nice to have * Experience working with ...

GRVTY

Senior Data Scientist

Saint Louis, MO · On-site

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

You will leverage senior-level Python programming skills to build production-ready tools, automate ... Experience mentoring junior data scientists or leading technical modernization initiatives.

GRVTY

Senior Data Scientist

Saint Louis, MO

You will leverage senior-level Python programming skills to build production-ready tools, automate ... Experience mentoring junior data scientists or leading technical modernization initiatives.

Deloitte

Integration Engineer II

Saint Louis, MO · On-site

$101K - $136K/yr

Build backend services and APIs using Python (e.g., FastAPI, Django, Flask), Javascript, Azure ... Take ownership of assigned projects, manage stakeholder expectations, and mentor junior team ...

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All JobsPython Developer JobsJunior Python Developer JobsJunior Python Developer Jobs in Saint Charles, MO

Junior Python Developer information

See Saint Charles, MO salary details

$22.6K

$83.8K

$129.5K

How much do junior python developer jobs pay per year?

As of Aug 13, 2026, the average yearly pay for junior python developer in Saint Charles, MO is $83,781.00, according to ZipRecruiter salary data. Most workers in this role earn between $63,100.00 and $81,900.00 per year, depending on experience, location, and employer.

What is a junior Python developer?

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?

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.

Is there a demand for junior Python developers?

There is strong demand for junior Python developers across various industries, including web development, data analysis, and automation. Companies seek candidates with basic programming skills, knowledge of frameworks like Django or Flask, and familiarity with version control tools such as Git. Entry-level roles are available in many regions due to Python's popularity and versatility.
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Junior Python Developer jobs near you
Infographic showing various Junior Python Developer job openings in Saint Charles, MO as of August 2026, with employment types broken down into 75% Full Time, and 25% Contract. Highlights an 100% In-person job distribution, with an average salary of $83,781 per year, or $40.3 per hour.

Machine Learning Engineer 727

Freedom Technology Solutions Group

Saint Louis, MO • On-site

Full-time

Posted 24 days ago

Job description

Freedom Technology Solutions Group is seeking a Machine Learning Engineer to develop, deploy, and optimize production AI/ML capabilities supporting mission-critical geospatial and intelligence systems. You will work at the intersection of software engineering, cloud architecture, and data science to build scalable machine learning pipelines capable of operating within secure government environments.

This is a hands-on engineering position focused on moving models from research into reliable production systems.


Responsibilities:

  • Da
  • Design, train, validate, and deploy machine learning models
  • Build production inference pipelines
  • Develop feature engineering workflows
  • Optimize model performance and resource utilization
  • Implement MLOps pipelines supporting continuous integration and deployment
  • Build scalable APIs exposing AI capabilities
  • Monitor model drift and operational performance
  • Collaborate with Data Scientists and Software Engineers
  • Deploy AI workloads into AWS cloud environments
  • Support computer vision, NLP, and geospatial AI initiatives
  • Collaborate with architects, data scientists, and mission stakeholders to gather, document, and refine customer requirements, including data mapping and integration needs
  • Assist in implementing integration solutions in collaboration with development team members
  • Facilitate communication between stakeholders to ensure timely and effective requirements execution
  • Ensure activities align with established processes, standards, and mission objectives
  • Contribute to documentation of processes, procedures, integration patterns, and lessons learned


Key Technologies

  •  A
  • Python
  • PyTorch
  • TensorFlow
  • Scikit-learn
  • Hugging Face
  • MLflow
  • Docker/Podman
  • Kubernetes/EKS
  • ECS
  • Lambda
  • SageMaker
  • GitLab CI/CD
  • Linux
  • PostgreSQL/PostGIS, Aurora, Oracle (w/Spatial)
  • Redis, Elasticache
  • GDAL, Rasterio, OGR

Required Qualifications

  • Active TS/SCI clearance (eligible for CI Poly)
  • 1-3(Junior), 3-7(Journeyman), 8-11 (Senior), >12 (Principal) years of experience in software development, system integration, or technical support roles
  • Experience working directly with customers or stakeholders in a technical or mission environment
  • Strong communication and coordination skills across technical and non-technical teams
  • Experience gathering and documenting requirements
  • Ability to manage multiple tasks and priorities in a dynamic environment
  • Familiarity with Agile development practices
  • Experience using GitLab or similar tools for collaboration and tracking


Desired Qualifications

  • Experience deploying production AI systems
  • Experience with computer vision
  • Experience with large language models
  • Geospatial AI experience
  • AWS AI services
  • Experience processing satellite imagery
  • Familiarity secure data movement environments
  • Experience working with enterprise service processes such as Service+
  • Development or scripting experience (Python, JavaScript, or similar)
  • Geospatial/GIS development a plus
  • Experience with data mapping or integration workflows (using JSON or other object notation)
  • Familiarity with operational dashboards and metrics reporting
  • Experience supporting customer requirement implementation and/or system integration efforts

Apply