1

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

We are seeking a Software Engineer to support our client's intelligence analysis products and ... Java, JavaScript or Python enterprise application development. Web services architecture, design ...

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 ...

Senior Data Engineer

Saint Louis, MO · On-site

$103K - $140K/yr

The Senior Data Engineer is responsible for architecting, implementing, and maintaining scalable ... Streamline data workflows using Python, JSON, Composer, and Airflow, while proactively monitoring ...

Senior Data Engineer

Saint Louis, MO · On-site

$103K - $140K/yr

The Senior Data Engineer is responsible for architecting, implementing, and maintaining scalable ... Streamline data workflows using Python, JSON, Composer, and Airflow, while proactively monitoring ...

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 ...

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 ...

Senior Industrial Engineer Company: The Boeing Company The Boeing Defense, Space & Security (BDS ... Handson technical mindset: experience with at least one analytical or scripting tool (e.g., Python ...

next page

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 Jun 23, 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:

Senior Software Engineer - News Engineering (Elasticsearch)

LSEG (London Stock Exchange Group)

Creve Coeur, MO • On-site

$113K - $189K/yr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted 22 days ago


Job description

Senior Software Engineer - News Engineering @ LSEG

Help us shape the future of real-time news delivery and join a team powering the heartbeat of global information! LSEG's News Engineering group is looking for a Senior Software Engineer to help evolve our News platform, delivering enriched breaking news to customers worldwide in subsecond time. If you're motivated by high-performance systems, real-world impact, and incorporating modern engineering practices in a dynamic and forward-thinking environment - this is your opportunity.

This role is ideal for engineerswho thrive as individual contributors and can lead a scrum team. You'll deepen your expertise in low-latency, high-throughput systems and have clear paths to expanding your career to technical leadership, architecture, reliability, or applied ML for news analytics.

As a senior software engineer in the News team at LSEG, you will build and evolve services, primarily in Java and Python, with a strong emphasis on performance, observability, and continuous improvement in a cloud-native environment. We encourage pragmatic experimentation with new tools, libraries, and approaches when they improve reliability, performance, or developer experience. Learn how structured data and News industry standards enable fast, reliable news delivery while simplifying problems for customers. Collaborate in a scrum team, crafting solutions and delivering new features. Own the design and delivery of critical services, from architecture decisions through to production support, with autonomy to influence technical direction. Help automate deployment, upgrades, and maintenance using modern DevOps techniques. Participate in a well-structured on-call rotation focused on sustainability, automation, and preventing repeat incidents - not heroics.

What We're Looking For

  • Solid experience withJava and Python on Linuxand real-time systems.
  • Practical experience in using IP-based protocols (TCP/IP, UDP, HTTPS, etc)
  • Familiarity withunit testing and test-driven development.
  • Understanding ofsearch technology such as Elasticsearch.
  • Experience withcloud infrastructureand container orchestration.
  • Strong problem-solving skills.
  • Ability to work independently and communicate clearly.

Bonus Points

  • Hands-on experience with GitLab CI/CD, Kubernetes, or Terraform.
  • Experience with GitHub Copilot to aid in the engineering process.
  • Knowledge of NewsMLG2 or similar standards and experience implementing a standard format at speed.

Why Join Us?

  • Impact: Your work helps deliver critical news to millions in real time.
  • Growth: Learn from expert engineers and expand your skills across cloud, data, and resilient systems.
  • Culture: We value curiosity over dogma, ownership over handoffs, and pragmatism over perfection. You'll work in a globally distributed team that supports each other.
  • Flexibility: Hybrid work options and a balanced work-life environment.

Career Stage:

Senior Associate

Compensation/Benefits Information:

LSEG is committed to offering competitive Compensation and Benefits. The anticipated base salary for this position is $113,900 - $189,900. Please be aware base salary ranges may vary by geographic location, city and state. In addition to our offered base salary, this role is eligible for our Annual Incentive Plan (AIP/"bonus plan"). Target AIP rates will be commensurate with role level and posted career stage. Individual salary will be reflective of job related knowledge, skills and equivalent experience. LSEG roles (excluding internships and part-time roles of less than 20 hours per week) are typically eligible for inclusion in our LSEG Benefits program, which includes offerings of: Annual Wellness Allowance, Paid time-off, Medical, Dental, Vision, Flex Spending & Health Savings Options, Prescription Drug plan, 401(K) Savings Plan and Company match. LSEG's Benefits plan also includes basic life insurance, disability benefits, emergency backup dependent care, adoption assistance commuter assistance etc.

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.