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Python Fastapi Developer Jobs in Saint Louis, MO

Elite Technical

AI/ML Developer

Saint Louis, MO · On-site

... Python - asyncio, httpx, FastAPI - Prompt engineering - system prompts, few-shot, structured JSON output - Circuit breaker patterns, retry logic, resilient service design - PostgreSQL and async ORMs ...

Pwc

GenAI Python Systems Engineer-Director

Saint Louis, MO · On-site

$155K - $410K/yr

... Data Engineer Associate] is a plus - Proficient in Python and structured/unstructured data ... maintaining FastAPI endpoints for applications - Understanding AI techniques enhancing LLMs ...

New

Focus Financial Partners

BI & Data Engineer

Saint Louis, MO · On-site

$111K - $133K/yr

... FastAPI (or a similar Python backend framework) to build custom applications. Familiarity with ... Programming: Solid Python skills for backend and application development, and working knowledge of ...

Focus Financial Partners

BI & Data Engineer

Saint Louis, MO · Hybrid

$111K - $133K/yr

... FastAPI (or a similar Python backend framework) to build custom applications. Familiarity with ... Programming: Solid Python skills for backend and application development, and working knowledge of ...

GLOBAL IT CON LLC

Senior AI/ML Engineer

Saint Louis, MO · On-site

$99K - $136K/yr

... Python - asyncio, httpx, FastAPI - Prompt engineering - system prompts, few-shot, structured JSON output - Circuit breaker patterns, retry logic, resilient service design - PostgreSQL and async ORMs ...

Omni Federal

Software Engineer

Saint Louis, MO · On-site

$130 - $180/hr

Hands-on experience with Python in production application development environments or building ... Experience building backend web services using FastAPI or Node.js * Experience working with ...

MasterCard

Senior AI Engineer

O Fallon, MO · Hybrid

$97K - $134K/yr

Excellent Python engineering skills including async programming, API development (FastAPI), and building inference-ready microservices; SQL proficiency required. Hands-on experience with cloud AI ...

Omni Federal

Software Engineer

Saint Louis, MO · On-site

Hands-on experience with Python in production application development environments or building ... Experience building backend web services using FastAPI or Node.js * Experience working with ...

Mastercard, Inc.

Senior AI Engineer

O Fallon, MO · On-site

$97K - $134K/yr

... Python engineering skills including async programming, API development (FastAPI), and building inference-ready microservices; SQL proficiency required. • Hands-on experience with cloud AI ...

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How much do python fastapi developer jobs pay per hour?

As of Aug 25, 2026, the average hourly pay for python fastapi developer in Saint Louis, MO is $56.99, according to ZipRecruiter salary data. Most workers in this role earn between $46.97 and $64.76 per hour, depending on experience, location, and employer.

What is a Python FastAPI developer?

A Python FastAPI Developer is responsible for designing, developing, and maintaining backend applications using FastAPI, a modern web framework for building APIs with Python. They work on creating high-performance APIs, integrating with databases, implementing authentication, and ensuring scalability. This role often involves working with asynchronous programming, cloud services, and containerization tools like Docker. Developers collaborate with teams to create efficient, secure, and well-documented API endpoints for web and mobile applications.

What are some typical daily tasks for a Python FastAPI developer?

A Python FastAPI Developer typically spends their day designing, developing, and maintaining RESTful APIs to support web or mobile applications. This involves writing clean and efficient Python code, collaborating with frontend developers or other backend engineers to integrate new features, and ensuring the application meets performance and security standards. Developers also participate in code reviews, debugging, and continuous integration processes, while regularly communicating with product managers or stakeholders to align on project requirements. Staying up to date with FastAPI enhancements and industry best practices is also a common part of the role.

What are the key skills and qualifications needed to thrive in the Python FastAPI developer position, and why are they important?

To thrive as a Python FastAPI Developer, you need strong proficiency in Python programming, experience designing RESTful APIs with FastAPI, and a background in web development concepts. Familiarity with version control systems like Git, containerization tools such as Docker, and knowledge of cloud platforms or SQL/NoSQL databases are commonly required, and certifications in cloud services or Python development can be advantageous. Excellent problem-solving skills, effective communication, and the ability to collaborate in agile teams help developers contribute efficiently to complex projects. These competencies ensure robust, scalable backend solutions and smooth coordination within development teams to meet business goals.

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Python Fastapi Developer jobs near you
Infographic showing various Python Fastapi Developer job openings in Saint Louis, MO as of August 2026, with employment types broken down into 100% Full Time. Highlights an 67% In-person, and 33% Remote job distribution, with an average salary of $118,546 per year, or $57 per hour.

AI/ML Developer

Saint Louis, MO • On-site

Elite Technical
51 - 200 employees
Learn more about Elite Technicalexternal

Other

Posted 7 days ago

Job description

AI/ML Developer

Our client, a multinational telecommunications technology company is seeking a highly experienced AI Developer. You will design, develop, and deploy LLM-powered agents and pipelines that directly serve field technicians in production. You will work closely with the platform architect and contribute to the core multi-agent orchestration system.
Key Responsibilities:
- Design and develop LLM-powered agents using LangGraph and LangChain frameworks
- Build and enhance multi-agent orchestration pipelines with conditional routing, state management, and error recovery
- Develop RAG pipelines with hybrid search (semantic + keyword), re-ranking, and Reciprocal Rank Fusion
- Implement tool-calling agents with parallel API execution, sequential enrichment chains, and summarization
- Build real-time streaming capabilities (WebSocket / SSE) for conversational AI
- Integrate with Azure OpenAI APIs with circuit breaker patterns and fallback chains
- Implement prompt engineering and dynamic prompt management (DB-backed with in-memory caching)
- Design and implement multi-modal AI features (image analysis with vision models)
- Write production-quality Python code with error handling, logging, observability, and unit tests
- Participate in code reviews, architecture discussions, and sprint delivery.
If you would like to learn more, please reach out to Elite Technical.

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Required Skills:
- 10+ years of software development with strong Python expertise in production environments
- 2+ years hands-on LLM development (LangChain, LangGraph, or equivalent frameworks)
- RAG pipeline experience - embeddings, vector search, re-ranking, answer generation
- LLM APIs - OpenAI Chat Completions, Responses API, streaming, tool calling
- Async Python - asyncio, httpx, FastAPI
- Prompt engineering - system prompts, few-shot, structured JSON output
- Circuit breaker patterns, retry logic, resilient service design
- PostgreSQL and async ORMs (SQLAlchemy async / Alembic)
- Git, CI/CD, Docker, Kubernetes basics
- Strong system design skills - microservices, distributed systems, API design

The client will only interview U.S. Citizens and s.

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