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Senior Fastapi Developer Jobs in Illinois (NOW HIRING)

Fitch Group

Senior Software Engineer, AI (Chicago)

Chicago, IL · On-site

$126.30K - $166.50K/yr

Fitch Solutions is currently seeking a Senior Software Engineer, AI based out of our Chicago office ... Build robust production infrastructure - Develop enterprise-scale APIs (FastAPI) for deployment ...

FIS Amount

Senior AI Software Engineer

Chicago, IL · On-site

$126.20K - $166.40K/yr

As an AI Software Engineer, you'll spend your days architecting and building AI-powered systems ... Proven track record designing and developing scalable APIs and distributed services (FastAPI ...

Morningstar

Senior Software Engineer

Chicago, IL · On-site +1

$153.32K/yr

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

The Hartford

Sr. Full Stack AI Engineer

Chicago, IL · On-site

Senior Staff Software Engineer - IE07HE We're determined to make a difference and are proud to be ... Python/FastAPI/Django, or C#/.NET * Cloud & DevOps: Strong hands-on experience deploying and ...

Vizient

Sr AI/ML Engineer

Chicago, IL

$102.40K - $179K/yr

We are seeking engineers who are driven, curious, and energized by the pace of AI innovation ... Experience with model serving frameworks and API development (e.g., FastAPI, MLflow, etc.) required.

FIS Amount

Senior AI Software Engineer

Chicago, IL · On-site

$126.20K - $166.40K/yr

As an AI Software Engineer, you'll spend your days architecting and building AI-powered systems ... Proven track record designing and developing scalable APIs and distributed services (FastAPI ...

ShyftOff

Senior Full Stack Engineer

Chicago, IL · On-site

Contribute to improving developer tooling , deployment workflows, and system observability. Impact ... FastAPI Data : PostgreSQL Cloud: ECS, EC2, Lambda, RDS, S3 Tools: n8n, Cursor, Github Copilot ...

Vizient, Inc.

Sr AI/ML Engineer

Chicago, IL · On-site

$102.40K - $179K/yr

We are seeking engineers who are driven, curious, and energized by the pace of AI innovation ... Experience with model serving frameworks and API development (e.g., FastAPI, MLflow, etc.) required ...

Infleqtion

Quantum Software Engineer

Chicago, IL

This role is open to both entry-level and senior-level candidates. Job Responsibilities The duties ... Experience with backend development with tools such as FastAPI for web frameworks and PostgreSQL ...

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

To thrive as a Senior FastAPI Developer, you need deep expertise in Python, RESTful API design, and experience building scalable web backends, typically supported by a degree in computer science or related field. Familiarity with FastAPI, Docker, cloud platforms (such as AWS or Azure), and CI/CD tools is highly valued, along with proficiency in testing frameworks. Strong problem-solving, leadership, and communication skills help you collaborate effectively with cross-functional teams and mentor junior developers. These skills enable the delivery of robust, efficient, and maintainable APIs that support business goals and high user demands.

What are some common challenges faced by Senior FastAPI Developers when scaling applications, and how can these be addressed?

Senior FastAPI Developers often encounter challenges related to managing high concurrency, optimizing API performance, and ensuring robust security as applications scale. To address these, it’s important to implement asynchronous programming practices, leverage efficient database queries, and utilize API gateways for better traffic management. Collaboration with DevOps and QA teams is also essential to automate deployments and monitor system health, ensuring smooth scaling and reliable user experiences.

What does a Senior FastAPI Developer do?

A Senior FastAPI Developer designs, develops, and maintains backend web applications using the FastAPI framework in Python. They are responsible for building scalable APIs, optimizing performance, ensuring security best practices, and integrating with databases and external services. Senior developers also mentor junior team members, contribute to architecture decisions, and collaborate closely with front-end engineers and stakeholders to deliver robust software solutions.
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Infographic showing various Senior Fastapi Developer job openings in Illinois as of May 2026, with employment types broken down into 77% Full Time, 18% Part Time, and 5% Contract. Highlights an 54% Physical, and 46% Remote job distribution.

Senior Software Engineer, AI (Chicago)

Fitch Group

Chicago, IL • On-site

$126.30K - $166.50K/yr

Full-time

Retirement

Posted yesterday

Job description

Fitch Solutions is currently seeking a Senior Software Engineer, AI based out of our Chicago office.
Fitch Solutions is a leading provider of insights, data and analytics. It informs investment strategies, strengthens risk management capabilities and helps identify strategic opportunities. Its analysts, lawyers, journalists and economists offer in-depth views on credit markets/risk and individual credits, ESG, developed and emerging markets, and industry sectors. Fitch Solutions is part of Fitch Group, a global leader in financial information services with operations in over 30 countries. Fitch Group is owned by Hearst.
By becoming a part of the Fitch Solutions team, you will join a group of colleagues driving high-impact AI initiatives and identifying cross-product synergies across our external product portfolio. We advance innovation by uncovering strategic opportunities and delivering scalable, enterprise-grade solutions. You'll work in a dynamic environment where innovation is encouraged, and collaboration is key to developing solutions that address the evolving needs of global markets. With a portfolio of best-in-class, we offer you the opportunity to advance your career while contributing to a company known for its expertise and commitment to excellence.
What We Offer:
  • Create transformative AI systems with measurable impact - Design and deploy production-ready generative AI platforms, multi-agent systems, and intelligent automation; tackle frontier AI challenges witnessing your innovations reshape products in real-time.
  • Leverage cutting-edge AI innovation - Experiment with cutting-edge LLMs and foundation models, architect RAG implementations, design sophisticated agentic systems, and develop Model Context Protocol (MCP) servers for Fitch Solutions; stay at the bleeding edge of AI technology with access to the latest tools, frameworks, and platforms.
  • Lead enterprise-wide AI standardization initiatives - Build GenAI solutions across multiple business units while creating unified patterns, reusable components, and standardization frameworks that enable AI at enterprise scale across Fitch Solutions.
  • Address complex, cross-functional challenges - Work at the intersection of engineering and product development, building systems that leverage GenAI agentic workflows and production-scale deployment; tackle problems that will expand your expertise and push the boundaries of what's technically possible.

We'll Count on You To:
  • Lead transformative GenAI system development - Spearhead the creation of sophisticated generative AI solutions including enterprise chatbot platforms, evaluation frameworks, agentic workflows, RAG architectures, applied GenAI applications, and Model Context Protocol (MCP) implementations; deliver production-grade, scalable code that meets enterprise performance standards.
  • Pioneer AI innovation through hands-on engineering - Experiment with cutting-edge foundation models, design and implement GenAI/ML architectures, assess emerging AI technologies, develop rapid proofs-of-concept, and bridge the gap between research breakthroughs and production-ready capabilities that generate tangible business value.
  • Build robust production infrastructure - Develop enterprise-scale APIs (FastAPI) for deployment, architect and implement comprehensive cloud-based AI infrastructure on AWS/Azure, and ensure systems are optimized for performance, reliability, and scalability.
  • Demonstrate full-stack engineering excellence - Apply proficiency across the entire technology stack to build enterprise-grade websites and applications, integrating AI capabilities seamlessly into user-facing products and backend systems.
  • Build and deliver reliable AI solutions - Participate in the full software development lifecycle for AI initiatives, contribute technical insights to design discussions, apply engineering best practices.
  • Collaborate and communicate effectively - Partner with cross-functional teams including product managers, engineers and business stakeholders to translate complex technical concepts, gather requirements, and ensure AI solutions directly address user needs and strategic objectives.

What You Need to Have:
  • 7+ years of professional experience designing, developing, and deploying production-grade AI/ML systems, with a proven track record of delivering sophisticated generative AI and machine learning solutions at scale.
  • 5+ years in full stack software engineering building and deploying real-world enterprise applications; advanced Python programming skills with strong backend development capabilities.
  • Proven experience in developing and deploying intelligent conversational AI systems using RAG architectures, Model Context Protocol (MCP), AI-enabled search, vector databases, and LLM integration in real-time enterprise environments.
  • Hands-on enterprise experience developing GenAI applications using LangChain and LangGraph frameworks with expertise in agent architecture design, state management, memory systems, and graph-based workflow orchestration.
  • Strong technical expertise in embeddings, vector databases for AI integration, and LLM integration/fine-tuning across platforms such as OpenAI, LLaMA; solid understanding of ML algorithms with production experience using frameworks and tools including FastAPI, PyTorch/TensorFlow, and MLflow.
  • Extensive experience building and integrating generative AI solutions into production environments, including working with large language models, designing multi agentic systems and embedding AI capabilities into existing product ecosystems.
  • Strong foundation in MLOps practices, containerization technologies (Docker, Kubernetes/AWS EKS), cloud infrastructure (AWS/Azure), AI-specific services (AWS Bedrock, SageMaker, Azure AI Search), and orchestration tools.
  • Excellent communication and collaboration skills, with the ability to translate complex technical concepts for diverse stakeholders and work effectively across cross-functional teams.

Why Fitch?
  • Hybrid Work Environment: 2 days a week in office required based on your line of business and location.
  • A Culture of Learning & Mobility: Dedicated trainings, leadership development and mentorship programs designed to ensure that your time at Fitch will be a continuous learning opportunity
  • Investing in Your Future: Retirement planning and tuition reimbursement programs that empower you to achieve your short and long-term goals
  • Promoting Health & Wellbeing: Comprehensive healthcare offerings that enable physical, mental, financial, social, and occupational wellbeing
  • Supportive Parenting Policies: Family-friendly policies, including a generous global parental leave plan, designed to help you balance career and family life effectively
  • Inclusive Work Environment: A collaborative workplace where all voices are valued, with Employee Resource Groups that unite and empower our colleagues around the globe
  • Dedication to Giving Back: Paid volunteer days, matched funding for donations and ample opportunities to volunteer in your community

Every team member is essential to our business and each perspective is critical to our success. We embrace a diverse culture that encourages a free exchange of ideas, guaranteeing your voice will be heard and your work will have an impact, regardless of seniority.
We are building incredible things at Fitch and we invite you to join us on our journey.
Fitch Group is a global leader in financial information services with operations in more than 30 countries. Wholly owned by the Hearst Corporation, we are comprised of three main businesses: Fitch Ratings | Fitch Solutions | Fitch Learning.
For more information please visit our websites:
www.fitchratings.com | www.fitchsolutions.com | www.fitchlearning.com
Fitch is committed to providing global securities markets with objective, timely, independent and forward-looking credit opinions. To protect Fitch's credibility and reputation, our employees must take every precaution to avoid conflicts of interests or any appearance of a conflict of interest. Should you be successful in the recruitment process at Fitch Ratings you will be asked to declare any securities holdings and other potential conflicts prior to commencing employment. If you, or your immediate family, have any holdings that may conflict with your work responsibilities, you may be asked to divest yourself of them before beginning work.
Fitch Group is proud to be an Equal Opportunity and Affirmative Action Employer. We evaluate qualified applicants without regard to race, color, national origin, religion, sex, sexual orientation, gender identity, disability, protected veteran status, and other statuses protected by law.
FOR CHICAGO ROLES ONLY: Expected base pay rates for the role will be between $120,000 and $140,000 per year. Actual salaries will be determined on an individualized basis and may vary based on factors including but not limited to education, training, experience, past performance, and other job-related factors. Base pay is one part of Fitch's total compensation package, which, depending on the position, may also include commission earnings, discretionary bonuses, long-term incentives, and other benefits sponsored by Fitch.
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