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Freelance Junior Python Developer Jobs in Missouri

Merck Group

Staff Software Engineer

Saint Louis, MO · On-site

$110K - $165K/yr

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

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.

Jobtailor

Senior Engineer

California, MO · On-site

$150 - $190/hr

Conduct design sessions, code reviews, and mentor junior engineers to elevate engineering quality ... Familiarity with Python, Golang, PowerShell, or similar programming and scripting languages is ...

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Freelance Junior Python Developer information

What does a freelance junior Python developer do?

A Freelance Junior Python Developer is an entry-level programmer who works independently or through contracts to build, test, and maintain software using the Python programming language. They often assist with coding small features, fixing bugs, and supporting more senior developers on projects. Their tasks may include writing simple scripts, working on websites or applications, and learning best practices in software development. Because they are freelancers, they typically work for multiple clients rather than a single employer.

What are the key skills and qualifications needed to thrive as a freelance junior Python developer?

To thrive as a Freelance Junior Python Developer, you need a solid understanding of Python programming, basic software development principles, and familiarity with version control systems, typically supported by a relevant degree or coding bootcamp certification. Competence with tools like Git, basic web frameworks (e.g., Flask or Django), and cloud platforms (such as AWS or Heroku) is often required. Strong communication, time management, and problem-solving abilities help you collaborate with clients and deliver projects on schedule. These skills enable you to produce reliable code, respond effectively to client needs, and build a reputation for professionalism in the competitive freelance market.

What are some common challenges faced by freelance junior Python developers, and how can they be addressed?

Freelance Junior Python Developers often encounter challenges such as managing multiple projects simultaneously, communicating effectively with clients who may have limited technical knowledge, and keeping up with rapidly evolving technologies. To address these challenges, it's important to develop strong organizational skills, set clear expectations with clients, and continuously invest time in learning new libraries and frameworks. Joining online communities and seeking mentorship can also provide valuable support and opportunities for growth.

What is the difference between Freelance Junior Python Developer vs Freelance Data Analyst?

AspectFreelance Junior Python DeveloperFreelance Data Analyst
Required SkillsPython, basic programming, problem-solvingData analysis, SQL, Excel, Python (optional)
Work EnvironmentProject-based, remote or freelance platformsProject-based, remote or freelance platforms
Common IndustriesTech, startups, software developmentFinance, marketing, healthcare
CertificationsNone mandatory, some may have Python coursesData analysis certifications (e.g., Google Data Analytics)

Freelance Junior Python Developers focus on coding and software tasks, while Freelance Data Analysts analyze data sets to provide insights. Both roles often operate remotely and require some technical skills, but their core responsibilities differ significantly.

What freelance jobs can I do with a freelance junior python developer?

A freelance junior Python developer can take on tasks such as building and maintaining web applications, automating workflows, data analysis, and scripting projects. These roles often involve working with frameworks like Django or Flask, and require basic programming skills, problem-solving, and familiarity with version control tools like Git.

What are the most commonly searched types of Junior Python Developer jobs in Missouri?

The most popular types of Junior Python Developer jobs in Missouri are:

What are popular job titles related to Freelance Junior Python Developer jobs in Missouri?

For Freelance Junior Python Developer jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Freelance Junior Python Developer jobs in Missouri look for?

The top searched job categories for Freelance Junior Python Developer jobs in Missouri are:

What cities in Missouri are hiring for Freelance Junior Python Developer jobs?

Cities in Missouri with the most Freelance Junior Python Developer job openings:

Freelance Junior Python Developer jobs near you

Staff Software Engineer

Merck Group

Saint Louis, MO • On-site

$110K - $165K/yr

Full-time

Medical, Retirement, PTO

Posted 27 days ago

Job description

Work Your Magic with us! Start your next chapter and join MilliporeSigma.
Ready to explore, break barriers, and discover more? We know you've got big plans - so do we! Our colleagues across the globe love innovating with science and technology to enrich people's lives with our solutions in Healthcare, Life Science, and Electronics. Together, we dream big and are passionate about caring for our rich mix of people, customers, patients, and planet. That's why we are always looking for curious minds that see themselves imagining the unimaginable with us.
This role does not offer sponsorship for work authorization. External applicants must be eligible to work in the US.
Your Role:
We are looking for a Staff Applied AI Engineer to build scalable, production-grade backend applications that leverage large and complex datasets. This role is software engineering first, with a strong emphasis on designing reliable systems that ingest, process, and serve data to power modern applications and AI-driven solutions.
You will work closely with product managers, software engineers, data scientists, and ML engineers to build robust backend services, data-intensive applications, and production AI systems. Success in this role requires strong software engineering fundamentals, practical experience working with data throughout its lifecycle, and the ability to design systems that are scalable, maintainable, and reliable in production.
Essential Job Functions:
  • Lead technical strategy for AI/LLM systems across multiple products
  • Architect retrieval, orchestration, agentic, and evaluation systems that run reliably in production
  • Set the standards for AI safety, evaluation, observability, and responsible rollout in a regulated context
  • Mentor Junior-level engineers into strong AI engineers; Employ AI Native development skills to multiply the productivity (Claude, etc.)
  • Lead the frontier: evaluate new models, techniques, and tools, and bring the right ones into the team
  • Design, develop, and maintain scalable Python applications and backend services.
  • Build systems that ingest, validate, transform, and manage structured and unstructured data in production environments.
  • Design data models and storage solutions that support scalable, high-performance applications.
  • Develop reusable components for data processing, validation, enrichment, and feature generation.

Who You Are
Minimum Qualifications:
  • Bachelor's degree in Computer Science, Engineering, Data Science, or a related quantitative field.
  • At least 3 years of hands-on experience in machine learning, data science, search relevance, or ranking systems.

Preferred Qualifications:
  • 10+ years of software engineering experience, with deep recent time leading production AI/LLM systems
  • Proven expertise in Python and ML frameworks (MLFlow, TensorFlow, PyTorch, Scikit- learn, or equivalent).
  • Strong background in statistical analysis, data exploration, and working with large-scale datasets.
  • Experience with feature engineering, data preprocessing, and data
  • Seasoned hands-on coder; still writes production Python regularly
  • Seasoned system designer for AI systems at scale - retrieval, agents, evaluation, latency, and cost, vector databases/pipelines
  • Strong experience building and maintaining production-grade backend applications.
  • Experience designing and developing RESTful APIs and distributed systems.
  • Strong SQL skills and experience working with relational databases; familiarity with NoSQL databases or modern data storage technologies is a plus.
  • Solid understanding of data engineering fundamentals, including data quality, validation, transformation, modeling, and efficient storage.
  • Experience designing systems that process large datasets reliably and efficiently.
  • Experience with cloud platforms such as Google Cloud Platform (GCP) or AWS.
  • Experience using Docker, Git, CI/CD pipelines, automated testing frameworks, and modern software engineering best practices.
  • Core engineering stack
  • Languages: Python, REST API, Pandas, NumPy
  • Cloud and infrastructure: AWS Services and/or GCP, Kubernetes, Bedrock
  • Distributed systems: event-driven architectures, including Kafka
  • Orchestration Frameworks: LangGraph, LangChain, AirFlow, etc.
  • Vector Databases like Qdrant

Nice to have Skills:
  • Experience with Kubernetes and container orchestration.
  • Familiarity with event-driven architectures and messaging platforms such as Kafka.
  • Familiarity with ML model deployment and inference pipelines

Location
This role can be based in either our St. Louis, MO or Burlington, MA office and requires a weekly onsite presence
Pay Range for this position: $110,500 - $165,900. The offer range represents the anticipated low and high end of the base pay compensation for this position. The actual compensation offered will be determined by factors such as location, level of experience, education, skills, and other job-related factors. Position may be eligible for sales or performance-based bonuses. Benefits offered by the Company include health insurance, paid time off (PTO), retirement contributions, and other perquisites. For more information click here: https://careers.emdgroup.com/us/en/benefits
What we offer: We are curious minds that come from a broad range of backgrounds, perspectives, and life experiences. We believe that this variety drives excellence and innovation, strengthening our ability to lead in science and technology. We are committed to creating access and opportunities for all to develop and grow at your own pace. Join us in building a culture of inclusion and belonging that impacts millions and empowers everyone to work their magic and champion human progress!
Apply now and become a part of a team that is dedicated to Sparking Discovery and Elevating Humanity!

Apply