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Senior Python Developer Jobs in Swansea, IL (NOW HIRING)

Strong familiarity with Python Flask, Mapping, Gitlab/DevOps, and ESRI development * Writing ... From entry-level employees to senior leaders, we believe theres always room to learn. We offer ...

Sr. Software Engineer

Hazelwood, MO

$115K - $152K/yr

The Senior Software Engineer works within established architectural frameworks, enhances CI/CD and ... Experience developing solutions using Python, including scripting, automation, or data processing ...

Sr. Software Engineer

Hazelwood, MO · On-site

$115K - $152K/yr

The Senior Software Engineer works within established architectural frameworks, enhances CI/CD and ... Experience developing solutions using Python, including scripting, automation, or data processing ...

Sr. Software Engineer

Hazelwood, MO · On-site

$113K - $149K/yr

The Senior Software Engineer works within established architectural frameworks, enhances CI/CD and ... Experience developing solutions using Python, including scripting, automation, or data processing ...

Sr. Software Engineer

Hazelwood, MO

$115K - $152K/yr

The Senior Software Engineer works within established architectural frameworks, enhances CI/CD and ... Experience developing solutions using Python, including scripting, automation, or data processing ...

Sr. Software Engineer

Hazelwood, MO · On-site

$113K - $149K/yr

The Senior Software Engineer works within established architectural frameworks, enhances CI/CD and ... Experience developing solutions using Python, including scripting, automation, or data processing ...

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Showing results 1-20

Senior Python Developer information

See Swansea, IL salary details

$53.4K

$137.9K

$189.4K

How much do senior python developer jobs pay per year?

As of Jul 14, 2026, the average yearly pay for senior python developer in Swansea, IL is $137,901.00, according to ZipRecruiter salary data. Most workers in this role earn between $118,000.00 and $158,800.00 per year, depending on experience, location, and employer.

What are the main responsibilities of a Senior Python Developer?

A Senior Python Developer is responsible for designing, developing, and maintaining complex software applications using the Python programming language. They lead the technical aspects of projects, mentor junior developers, and ensure code quality through code reviews and best practices. Additionally, they collaborate with cross-functional teams to gather requirements, solve technical challenges, and deploy scalable and efficient solutions. Senior Python Developers are also expected to stay updated with the latest trends and advancements in Python and related technologies.

What is the difference between Senior Python Developer vs Python Developer?

AspectSenior Python DeveloperPython Developer
Required ExperienceTypically 5+ years, with leadership and complex project experienceUsually 1-3 years, focusing on core Python skills
ResponsibilitiesDesigning architecture, mentoring, handling complex systemsWriting code, debugging, implementing features
CertificationsOptional but beneficial (e.g., Python certifications, cloud certs)Often not required
Work EnvironmentCollaborative teams, project planning, code reviewsDevelopment-focused, task-oriented

The main difference between a Senior Python Developer and a Python Developer lies in experience, responsibilities, and leadership. Senior developers handle complex projects, mentor others, and often participate in architecture decisions, while Python Developers focus on coding and feature implementation. Both roles are essential in tech companies, but the senior role requires more experience and broader skills.

What are the key skills and qualifications needed to thrive as a Senior Python Developer, and why are they important?

To thrive as a Senior Python Developer, you need advanced proficiency in Python programming, experience with software architecture, and a solid understanding of algorithms and data structures, usually backed by a degree in computer science or related fields. Familiarity with frameworks like Django or Flask, version control systems such as Git, and containerization tools like Docker are typically required, alongside knowledge of modern CI/CD pipelines. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with teams and mentor junior developers. Mastery of these skills ensures the delivery of scalable, maintainable software solutions and the ability to drive technical excellence within development teams.

What are some common challenges faced by Senior Python Developers when leading a development team?

Senior Python Developers often encounter challenges such as balancing hands-on coding with mentoring junior team members and ensuring code quality across the team. They are also responsible for making architectural decisions, which requires staying updated on best practices and emerging Python frameworks. Additionally, coordinating collaboration between cross-functional teams (like DevOps, QA, and front-end developers) can be complex, especially in agile environments where requirements may shift rapidly. Overcoming these challenges helps foster a productive and innovative team culture.
What job categories do people searching Senior Python Developer jobs in Swansea, IL look for? The top searched job categories for Senior Python Developer jobs in Swansea, IL are:
What cities near Swansea, IL are hiring for Senior Python Developer jobs? Cities near Swansea, IL with the most Senior Python Developer job openings:
Mid Software Developer

Full-time

Re-posted 18 days ago


Job description

Summary

Mid Software Developer

O’Fallon, IL

Are you ready to enhance your skills and build your career in a rapidly evolving business climate? Are you looking for a career where professional development is embedded in your employer’s core culture? If so, Chenega Military, Intelligence & Operations Support (MIOS) could be the place for you! Join our team of professionals who support large-scale government operations by leveraging cutting-edge technology and take your career to the next level! 

Chenega Agile Real-Time Solutions (CARS) was created with the purpose of providing integrated enterprise IT support to Federal customers both CONUS and OCONUS. CARS employs Subject Matter Experts (SMEs) with decades of experience working in the Federal marketplace. 

Chenega Agile Real-Time Solutions (CARS) is seeking a Mid Software Developer to join the FS2 – Foundation Solutions team. The Backend Software Developer will modify existing GOTS code and integrate open-source software solutions for display and analysis within Aeronautical Production Systems.


Responsibilities
  • Coding, developing, integrating, and debugging Python, React, C#, and other languages. Strong familiarity with Python Flask, Mapping, Gitlab/DevOps, and ESRI development
  • Writing validation tests against existing code baselines to ensure the integrity of the code during Agile development efforts.
  • Assisting with unit testing.
  • Writing scripts to automate AWS and RDS tasks.
  • Performs software systems development, including the design, development, troubleshooting, and debugging of software programs for software enhancements and new software-intensive systems and products.
  • Participate in peer reviews and unit testing, and must be adaptable to different responsibilities.
  • Duties include software requirements analysis, development of software products.
  • This role is responsible for identifying software and hardware dependencies and capacities.
  • Other duties as assigned

Qualifications
  • BS degree and 2+ years of prior relevant experience OR
  • Master's 2+years of prior relevant experience; OR
  • High School diploma or GED equivalent and 6+ years of related experience.
    • Adept at leveraging a comprehensive suite of AWS services, including Amazon S3 for storage, EC2 for compute, and Lambda for serverless functions. This expertise is complemented by strong experience in Python and shell scripting to automate cloud operations and streamline infrastructure management.
    • Possession of an AWS Certified Developer - Associate certification is a strong plus.
    • Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment.
    • Experience with TypeScript, Node.js/Express, ASP.NET Core Web API, Swagger (OpenAPI), C#, and Postgres
    • Familiarity with REST principles.
    • Experience with DevSecOps, including Kubernetes and Docker.
    • Experience with Python and .NET Core (coding, developing, designing, integrating, and debugging)
    • Experience with Linux Administration (including writing Bash scripts)
    • Experience scripting to automate AWS and RDS tasks
    • Experience using AWS SDK API tools to build on AWS. Lambdas, EC2, and React.
    • Experience implementing JavaScript, Java, and SQL
  • Background check
  • Successfully pass background and drug screening

Preferred Qualifications:

  • Master's Degree with 2+ years of prior relevant experience
  • Active TS/SCI Clearance

 

Knowledge, Skills, and Abilities:

  • Ability to obtain TS/SCI Clearance
  • Ability to work independently and yet be effective within a team setting
  • Must be capable of managing multiple efforts with time-related constraints in a fast-paced contracting environment
  • Demonstrated ability to effectively communicate and collaborate with diverse internal and external stakeholder groups and individuals
  • Friendly presence, helpful attitude, good interpersonal skills, and ability to work well with others.
  • Excellent skills in Microsoft Word, Excel, and other Office applications
  • Proficient with Microsoft Office Applications, and experience working in a home office setting, as well as the ability to train end users on frequently asked technical issues.
  • Ability to provide technical assistance and support over the phone; good phone skills, professional demeanor, and previous customer service experience strongly desired.
  • Good problem-solving skills; ability to visualize a problem/situation and think abstractly to solve it

How you’ll grow 

At Chenega MIOS, our professional development plan focuses on helping our team members at every level of their careers to identify and use their strengths to do their best work every day. From entry-level employees to senior leaders, we believe there’s always room to learn. 

We offer opportunities to help sharpen skills in addition to hands-on experience in the global, fast-changing business world. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their careers. 

Benefits 

At Chenega MIOS, we know that great people make a great organization. We value our team members and offer them a broad range of benefits. 

Learn more about what working at Chenega MIOS can mean for you. 

Chenega MIOS’s culture 

Our positive and supportive culture encourages our team members to do their best work every day. We celebrate individuals by recognizing their uniqueness and offering them the flexibility to make daily choices that can help them be healthy, centered, confident, and aware. We offer well-being programs and continuously look for new ways to maintain a culture where we excel and lead healthy, happy lives. 

Corporate citizenship 

Chenega MIOS is led by a purpose to make an impact that matters. This purpose defines who we are and extends to relationships with our clients, our team members, and our communities. We believe that business has the power to inspire and transform. We focus on education, giving, skill-based volunteerism, and leadership to help drive positive social impact in our communities. 

Learn more about Chenega’s impact on the world. 

Chenega MIOS News- https://chenegamios.com/news/ 

Tips from your Talent Acquisition Team 

We want job seekers exploring opportunities at Chenega MIOS to feel prepared and confident. To help you with your research, we suggest you review the following links: 

Chenega MIOS web site - www.chenegamios.com 

Glassdoor - https://www.glassdoor.com/Overview/Working-at-Chenega-MIOS-EI_IE369514.11,23.htm 

LinkedIn - https://www.linkedin.com/company/1472684/ 

Facebook - https://www.facebook.com/chenegamios/ 

#Chenega Agile Real Time Solutions, LLC


Estimated Salary/Wage
USD $75,000.00/Yr. Up to USD $100,000.00/Yr.Qualifications:
  • BS degree and 2+ years of prior relevant experience OR
  • Master's 2+years of prior relevant experience; OR
  • High School diploma or GED equivalent and 6+ years of related experience.
    • Adept at leveraging a comprehensive suite of AWS services, including Amazon S3 for storage, EC2 for compute, and Lambda for serverless functions. This expertise is complemented by strong experience in Python and shell scripting to automate cloud operations and streamline infrastructure management.
    • Possession of an AWS Certified Developer - Associate certification is a strong plus.
    • Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment.
    • Experience with TypeScript, Node.js/Express, ASP.NET Core Web API, Swagger (OpenAPI), C#, and Postgres
    • Familiarity with REST principles.
    • Experience with DevSecOps, including Kubernetes and Docker.
    • Experience with Python and .NET Core (coding, developing, designing, integrating, and debugging)
    • Experience with Linux Administration (including writing Bash scripts)
    • Experience scripting to automate AWS and RDS tasks
    • Experience using AWS SDK API tools to build on AWS. Lambdas, EC2, and React.
    • Experience implementing JavaScript, Java, and SQL
  • Background check
  • Successfully pass background and drug screening

Preferred Qualifications:

  • Master's Degree with 2+ years of prior relevant experience
  • Active TS/SCI Clearance

 

Knowledge, Skills, and Abilities:

  • Ability to obtain TS/SCI Clearance
  • Ability to work independently and yet be effective within a team setting
  • Must be capable of managing multiple efforts with time-related constraints in a fast-paced contracting environment
  • Demonstrated ability to effectively communicate and collaborate with diverse internal and external stakeholder groups and individuals
  • Friendly presence, helpful attitude, good interpersonal skills, and ability to work well with others.
  • Excellent skills in Microsoft Word, Excel, and other Office applications
  • Proficient with Microsoft Office Applications, and experience working in a home office setting, as well as the ability to train end users on frequently asked technical issues.
  • Ability to provide technical assistance and support over the phone; good phone skills, professional demeanor, and previous customer service experience strongly desired.
  • Good problem-solving skills; ability to visualize a problem/situation and think abstractly to solve it

How you’ll grow 

At Chenega MIOS, our professional development plan focuses on helping our team members at every level of their careers to identify and use their strengths to do their best work every day. From entry-level employees to senior leaders, we believe there’s always room to learn. 

We offer opportunities to help sharpen skills in addition to hands-on experience in the global, fast-changing business world. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their careers. 

Benefits 

At Chenega MIOS, we know that great people make a great organization. We value our team members and offer them a broad range of benefits. 

Learn more about what working at Chenega MIOS can mean for you. 

Chenega MIOS’s culture 

Our positive and supportive culture encourages our team members to do their best work every day. We celebrate individuals by recognizing their uniqueness and offering them the flexibility to make daily choices that can help them be healthy, centered, confident, and aware. We offer well-being programs and continuously look for new ways to maintain a culture where we excel and lead healthy, happy lives. 

Corporate citizenship 

Chenega MIOS is led by a purpose to make an impact that matters. This purpose defines who we are and extends to relationships with our clients, our team members, and our communities. We believe that business has the power to inspire and transform. We focus on education, giving, skill-based volunteerism, and leadership to help drive positive social impact in our communities. 

Learn more about Chenega’s impact on the world. 

Chenega MIOS News- https://chenegamios.com/news/ 

Tips from your Talent Acquisition Team 

We want job seekers exploring opportunities at Chenega MIOS to feel prepared and confident. To help you with your research, we suggest you review the following links: 

Chenega MIOS web site - www.chenegamios.com 

Glassdoor - https://www.glassdoor.com/Overview/Working-at-Chenega-MIOS-EI_IE369514.11,23.htm 

LinkedIn - https://www.linkedin.com/company/1472684/ 

Facebook - https://www.facebook.com/chenegamios/ 

#Chenega Agile Real Time Solutions, LLC

Education:UNAVAILABLEEmployment Type: FULL_TIME