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Senior Python Flask Developer Jobs in Illinois (NOW HIRING)

CNA

Senior Software Engineer, AI/ML

Chicago, IL · On-site

$72K - $141K/yr

We are looking for a highly skilled Senior Python AI Developer with deep expertise in building intelligent agents using Google Vertex AI, particularly with Gemini or OpenAI models. The ideal ...

Next Step Systems

Data Science Developer

Chicago, IL · On-site

Data Science Developer, Chicago, IL We are seeking a talented Data Science Developer candidate to ... a Python web framework (e.g., bottle, flask) preferred. - Experience with a JavaScript MVC ...

OneStream Software

Senior AI Engineer

Chicago, IL · On-site

$107K - $147K/yr

Use Python and SQL to build AI systems and functionality. * Troubleshoot and debug issues across ... Experience with webservices and API frameworks (Flask, FastAPI, etc.). * Knowledge of distributed ...

OneStream

Senior AI Engineer

Chicago, IL · On-site

$107K - $147K/yr

Use Python and SQL to build AI systems and functionality. * Troubleshoot and debug issues across ... Experience with webservices and API frameworks (Flask, FastAPI, etc.). * Knowledge of distributed ...

CEDENT

Python Developer (Moline, IL; Remote)

Moline, IL · On-site +1

$40 - $60/hr

As a Senior Software Engineer on this embedded operations team, you will be: Automating and ... in a scripting language (Python most commonly seen, but others are acceptable) Working ...

Cedent

Python Developer (Moline, IL; Remote)

Moline, IL · On-site +1

$40 - $60/hr

As a Senior Software Engineer on this embedded operations team, you will be: * Automating and ... Proficient in a scripting language (Python most commonly seen, but others are acceptable) * Working ...

OneStream

Senior AI Engineer

Chicago, IL · On-site

$130 - $190/hr

Use Python and SQL to build AI systems and functionality. * Troubleshoot and debug issues across ... Experience with webservices and API frameworks (Flask, FastAPI, etc.). * Knowledge of distributed ...

Morningstar, Inc.

Senior Software Engineer

Chicago, IL · On-site

$153K/yr

Architecting, optimizing and developing Python-based applications and APIs (FastAPI, Flask, RESTful services), including asynchronous programming and event-based architectures using cloud-native ...

Morningstar

Senior Software Engineer

Chicago, IL · On-site +1

$153K/yr

Architecting, optimizing and developing Python-based applications and APIs (FastAPI, Flask, RESTful services), including asynchronous programming and event-based architectures using cloud-native ...

Limited Legal Entity

Senior Software Engineer

Chicago, IL · On-site +1

$153K/yr

Architecting, optimizing and developing Python-based applications and APIs (FastAPI, Flask, RESTful services), including asynchronous programming and event-based architectures using cloud-native ...

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Senior Python Flask Developer information

What is a senior Python Flask developer?

Senior Python Flask Developers are experienced software engineers who specialize in building web applications using the Python programming language and the Flask web framework. They are responsible for designing, developing, and maintaining scalable backend systems, APIs, and web services. In addition to strong coding skills, they often lead projects, mentor junior developers, and ensure best practices in code quality, security, and performance. Their expertise allows them to solve complex technical challenges and contribute to the overall architecture and success of software projects.

What are the key skills and qualifications needed to thrive as a senior Python Flask developer, and why are they important?

To thrive as a Senior Python Flask Developer, you need advanced proficiency in Python, deep understanding of the Flask framework, and experience designing scalable backend architectures, typically supported by a degree in computer science or related field. Familiarity with RESTful API development, database management systems like PostgreSQL or MySQL, and version control tools such as Git is essential, and certifications in cloud platforms or web development can be beneficial. Strong problem-solving skills, clear communication, and the ability to mentor junior developers are standout soft skills for this role. These abilities ensure efficient delivery of robust, maintainable web applications and foster productive collaboration within development teams.

What are some common challenges faced by senior Python Flask developers when working on large-scale applications?

Senior Python Flask Developers often encounter challenges such as managing complex codebases, ensuring scalability, and maintaining performance as applications grow. Integrating Flask with other technologies (like databases, caching systems, or third-party APIs) can introduce architectural complexities. Additionally, balancing rapid development with writing maintainable, well-tested code is crucial. Collaboration with frontend developers, DevOps, and QA teams is frequent, requiring strong communication and problem-solving skills.

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

AspectSenior Python Flask DeveloperPython Developer
Required CredentialsBachelor's in CS or related, experience with Flask, REST APIsBachelor's in CS or related, basic Python knowledge
Work EnvironmentWeb development teams, startups, tech companiesSoftware development teams, startups, tech companies
Employer & Industry UsageTech firms, SaaS companies, startupsVariety of industries including finance, healthcare, tech
Search & Comparison IntentAdvanced roles, leadership, project scopeEntry to mid-level development, learning

The main difference between a Senior Python Flask Developer and a Python Developer lies in experience and responsibilities. Senior developers typically have more expertise in Flask, lead projects, and mentor junior staff, whereas Python Developers may focus on coding and basic application development. Both roles are essential in web development teams, but senior roles require deeper knowledge and leadership skills.

What are the most commonly searched types of Python Flask Developer jobs in Illinois?

The most popular types of Python Flask Developer jobs in Illinois are:

What are popular job titles related to Senior Python Flask Developer jobs in Illinois?

For Senior Python Flask Developer jobs in Illinois, the most frequently searched job titles are:

What job categories do people searching Senior Python Flask Developer jobs in Illinois look for?

The top searched job categories for Senior Python Flask Developer jobs in Illinois are:

Senior Python Flask Developer jobs near you

Senior Software Engineer, AI/ML

CNA

Chicago, IL • On-site

$72K - $141K/yr

Full-time

Re-posted 3 days ago

Job description

You have a clear vision of where your career can go. And we have the leadership to help you get there. At CNA, we strive to create a culture in which people know they matter and are part of something important, ensuring the abilities of all employees are used to their fullest potential.
We are looking for a highly skilled Senior Python AI Developer with deep expertise in building intelligent agents using Google Vertex AI, particularly with Gemini or OpenAI models. The ideal candidate has a strong foundation in Large Language Models and understands how they work under the hood, combined with experience in evaluating model performance through structured testing methodologies. This role requires proficiency in the technical aspects of agent development while adhering to best practices in prompt engineering, context filtering, and security-aware prompting. The candidate should also have hands-on experience with modern agent frameworks and observability tools, ensuring robust, scalable, and reliable AI solutions.
JOB DESCRIPTION:
Essential Duties & Responsibilities:
Performs a combination of duties in accordance with departmental guidelines:
  • Evaluates defined client area requirements and processes (e.g., new enhancements or maintenance) and detailed designs and develops moderate to complex application program solutions.
  • Ensures quality of application solutions by performing code review with peers, creating documentation, implementing code, verifying program logic, performing defect root cause analysis, and completing unit and integration testing. Participates in systems testing with other IT staff.
  • Assists with the high level design of solutions. Consults with the client area to analyze system requirements and capabilities, identify associated risks, and resolve problems. May act as a liaison between clients and applications area.
  • Researches and evaluates new and/or alternative solutions, and recommends the most efficient and cost effective solution for the systems/program design and develops system specifications and procedures. May include integrating vendor applications and consulting resources into existing applications and resources.
  • In conjunction with operations area technical staff, supports the implementation of the application into production and testing environments. May confer with technical personnel to identify and resolve issues.

Reporting Relationship: Typically Manager or above
Skills, Knowledge and Abilities
Key Required Skills & Experience:
  • Senior-level proficiency in Python, with experience in AI/ML development

  • Strong understanding of Large Language Models (LLMs) and their operational mechanics

  • Experience developing AI Agents on Google Vertex AI using Gemini or OpenAI

  • Expertise in Prompt Engineering Best Practices

Hands-on experience with:
  • Google Agent Development Kit

  • LangChain and LangGraph

Knowledge of Context Filtering and Prompting Security Best Practices
Familiarity with observability and debugging tools:
  • LangSmith

  • LangFuse

  • Phoenix or Arize

Experience with Eval AI Testing and model evaluation workflows
Education and Experience
1. Bachelor's degree in Computer Science, or related discipline, or equivalent work experience.
2. Typically a minimum four years of application program development experience.
3. Applicable certificates preferred.
#LI-MR1
#LI-Hybrid
In certain jurisdictions, CNA is legally required to include a reasonable estimate of the compensation for this role. In District of Columbia, California, Colorado, Connecticut, Illinois, Maryland, Massachusetts, New York and Washington, the national base pay range for this job level is $72,000 to $141,000 annually. Salary determinations are based on various factors, including but not limited to, relevant work experience, skills, certifications and location. CNA offers a comprehensive and competitive benefits package to help our employees - and their family members - achieve their physical, financial, emotional and social wellbeing goals. For a detailed look at CNA's benefits, please visit cnabenefits.com.
CNA utilizes AI-enabled technology during the recruiting process. For more information, please visit our careers page.
CNA is committed to providing reasonable accommodations to qualified individuals with disabilities in the recruitment process. To request an accommodation, please contact leaveadministration@cna.com

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