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Fastapi Developer Jobs in Saint Peters, MO (NOW HIRING)

Elite Technical

AI/ML Developer

Saint Louis, MO · On-site

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

Focus Financial Partners

BI & Data Engineer

Saint Louis, MO · On-site

$111K - $133K/yr

... custom React + FastAPI applications hosted natively in Snowflake). You'll use AI-assisted ... Partner with data engineers and analytics engineers who build and maintain Snowflake semantic ...

Focus Financial Partners

BI & Data Engineer

Saint Louis, MO · Hybrid

$111K - $133K/yr

... FastAPI applications hosted natively in Snowflake). You'll use AI-assisted development tools such as GitHub Copilot to accelerate delivery, and partner closely with data engineers and analytics ...

Interco

Junior Software Developer

Saint Louis, MO · On-site

$60K - $65K/yr

The Software Developer will collaborate with development team members and management to ensure ... FastAPI is a plus. * Solid working knowledge of PostgreSQL (writing queries, schema design ...

Interco

Junior Software Developer

Saint Louis, MO

$60K - $65K/yr

The Software Developer will collaborate with development team members and management to ensure ... FastAPI is a plus. * Solid working knowledge of PostgreSQL (writing queries, schema design ...

GLOBAL IT CON LLC

Senior AI/ML Engineer

Saint Louis, MO · On-site

$99K - $136K/yr

Louis, MO (Locals only) Duration:- Long term We are looking for a skilled AI/ML Developer to join ... FastAPI - Prompt engineering - system prompts, few-shot, structured JSON output - Circuit breaker ...

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 ...

Mastercard, Inc.

Senior AI Engineer

O Fallon, MO · On-site

$97K - $134K/yr

Title and Summary Senior AI Engineer Mastercard's Business & Market Insights (B&MI) group empowers ... FastAPI), and building inference-ready microservices; SQL proficiency required. • Hands-on ...

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Fastapi Developer information

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How much do fastapi developer jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for fastapi developer in Saint Peters, MO is $50.52, according to ZipRecruiter salary data. Most workers in this role earn between $38.61 and $61.83 per hour, depending on experience, location, and employer.

What is a FastAPI developer?

A FastAPI Developer is a software engineer who specializes in building web applications and APIs using the FastAPI framework, which is a modern, fast (high-performance) web framework for Python. FastAPI Developers are responsible for designing, developing, and maintaining backend services and APIs that are efficient, robust, and scalable. They often work with databases, authentication, and deployment processes, and ensure that the API endpoints adhere to best practices for security and performance. Their work is crucial for enabling smooth communication between front-end applications and backend systems.

What are the key skills and qualifications needed to thrive as a FastAPI developer?

To thrive as a FastAPI Developer, you need strong proficiency in Python programming, RESTful API design, and experience with FastAPI, often supported by a background in computer science or related fields. Familiarity with tools like SQL/NoSQL databases, Docker, and cloud platforms, as well as knowledge of asynchronous programming and API documentation tools like Swagger, is typically required. Excellent problem-solving skills, attention to detail, and effective communication set outstanding FastAPI developers apart. These skills are crucial for building reliable, high-performance APIs that meet modern application demands and facilitate seamless team collaboration.

What are some common challenges FastAPI developers face when integrating third-party services or APIs?

FastAPI Developers often encounter challenges when integrating third-party services, such as handling authentication protocols (like OAuth2), ensuring compatibility between JSON schemas, and managing asynchronous calls to avoid performance bottlenecks. It’s also common to troubleshoot and adapt to inconsistencies in external API documentation or rate limits. Collaborating closely with frontend teams and DevOps professionals helps streamline these integrations, ensuring robust, scalable API solutions.

What is the difference between Fastapi Developer vs Backend Developer?

AspectFastapi DeveloperBackend Developer
Required SkillsPython, Fastapi, REST APIs, async programmingMultiple languages (Python, Java, Node.js), REST/SOAP APIs, databases
Work EnvironmentWeb development, API-focused projects, microservicesBroader software development, server-side logic, database management
Industry UsageTech startups, SaaS, API-driven servicesEnterprise, e-commerce, finance, various industries

Fastapi Developers specialize in building high-performance APIs using Python and Fastapi, often within microservices architectures. Backend Developers have a broader scope, working with multiple languages and technologies to develop server-side applications across various industries. While Fastapi Developers focus on API efficiency, Backend Developers handle comprehensive backend systems.

What cities near Saint Peters, MO are hiring for Fastapi Developer jobs?

Cities near Saint Peters, MO with the most Fastapi Developer job openings:

Fastapi Developer jobs near you

AI/ML Developer

Saint Louis, MO • On-site

Elite Technical
51 - 200 employees
Learn more about Elite Technicalexternal

Other

Posted 22 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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