ZipRecruiter

Log In

1

Senior Fastapi Jobs in Denver, CO (NOW HIRING)

Infleqtion

Senior Software Engineer (QRF)

Louisville, CO · On-site

$160K - $185K/yr

We are seeking a Senior Software Engineer to lead the development and productization of our ... Own the backend REST API written in Python (FastAPI), ensuring robust integration with hardware ...

Infleqtion

Senior Software Engineer (QRF)

Louisville, CO · On-site

$160K - $185K/yr

We are seeking a Senior Software Engineer to lead the development and productization of our ... Own the backend REST API written in Python (FastAPI), ensuring robust integration with hardware ...

Infleqtion

Senior Software Engineer (QRF)

Louisville, CO · On-site

$160K - $185K/yr

We are seeking a Senior Software Engineer to lead the development and productization of our ... Own the backend REST API written in Python (FastAPI), ensuring robust integration with hardware ...

CACI

Mid-Senior Full Stack Developer

Aurora, CO · On-site

Mid-Senior Full Stack Developer Job Category: Engineering Time Type: Full time Minimum Clearance ... Build and maintain scalable RESTful and GraphQL APIs using Node.js, Python (FastAPI/Flask), or Java ...

New

Cisco

Senior Software Engineer (Remote)

Boulder, CO · Remote

$127K - $167K/yr

Design and develop production software and services using technologies such as Golang and Python, including APIs and services built with frameworks such as Flask or FastAPI. * Build and operate ...

Cisco

Senior Software Engineer (Remote)

Denver, CO · Remote

$126K - $166K/yr

Design and develop production software and services using technologies such as Golang and Python, including APIs and services built with frameworks such as Flask or FastAPI. * Build and operate ...

Kharon

Senior Data Engineer

Denver, CO · On-site

$160K - $200K/yr

API experience using FastAPI, Flask, Spring Boot or equivalent. * Understanding of elasticsearch ... a Senior Data Engineer to join us as we work to shape the way businesses perceive and navigate ...

KBI Biopharma, Inc.

Senior Software Engineer

Boulder, CO · On-site

$127K - $167K/yr

Job summary A Senior Software Engineer with exceptional data and software engineering skills, and a ... API frameworks and API building experience including REST, FASTAPI, AWS glue, ... KBI Biopharma ...

KBI Biopharma, Inc.

Senior Software Engineer

Boulder, CO

$127K - $167K/yr

Job summary A Senior Software Engineer with exceptional data and software engineering skills, and a ... API frameworks and API building experience including REST, FASTAPI, AWS glue, ... KBI Biopharma ...

next page

Showing results 1-20

All JobsFastapi JobsSenior Fastapi JobsSenior Fastapi Jobs in Denver, CO

Senior Fastapi information

See Denver, CO salary details

$25.7K

$82.6K

$168.3K

How much do senior fastapi jobs pay per year?

As of Sep 2, 2026, the average yearly pay for senior fastapi in Denver, CO is $82,638.00, according to ZipRecruiter salary data. Most workers in this role earn between $42,700.00 and $106,000.00 per year, depending on experience, location, and employer.

What is the difference between Senior Fastapi vs Backend Developer?

AspectSenior FastapiBackend Developer
Primary FocusBuilding APIs with Fastapi frameworkDeveloping server-side logic across various frameworks
Required SkillsPython, Fastapi, async programming, REST API designPython, multiple frameworks (Django, Flask, Fastapi), database management
Work EnvironmentTech companies, startups, cloud-based projectsVaried industries, enterprise and startup environments
CertificationsPython certifications, Fastapi experiencePython certifications, general backend development certifications

Senior Fastapi specialists focus specifically on building high-performance APIs using the Fastapi framework, often requiring expertise in async programming and REST API design. Backend Developers have a broader scope, working across multiple frameworks and technologies to develop server-side logic. While both roles require Python skills, Senior Fastapi roles are more specialized, whereas Backend Developers have a wider range of tools and responsibilities.

What are the most commonly searched types of Fastapi jobs in Denver, CO?

The most popular types of Fastapi jobs in Denver, CO are:

What are popular job titles related to Senior Fastapi jobs in Denver, CO?

For Senior Fastapi jobs in Denver, CO, the most frequently searched job titles are:

What job categories do people searching Senior Fastapi jobs in Denver, CO look for?

The top searched job categories for Senior Fastapi jobs in Denver, CO are:

Senior Fastapi jobs near you
Infographic showing various Senior Fastapi job openings in Denver, CO as of August 2026, with employment types broken down into 88% Full Time, 4% Part Time, and 8% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $82,638 per year, or $39.7 per hour.

Mid-Senior Full Stack Developer

CACI International Inc

Aurora, CO • On-site

Full-time

This job post has expired 2 days ago. Applications are no longer accepted.

Job description

Job Summary:
CACI International Inc is seeking a Mid-Senior Full Stack Developer to design and build the primary touchpoint between their platform and its customers. This role involves engineering responsive web applications and architecting an API layer to deliver real-time data while ensuring compliance with government security requirements.
Responsibilities:
• Design and maintain responsive front-end applications using React, handling complex data visualization and high-concurrency use cases for external partners.
• Build and maintain scalable RESTful and GraphQL APIs using Node.js, Python (FastAPI/Flask), or Java (Spring Boot) for third-party data access.
• Implement authentication and authorization patterns including OAuth2, OIDC, mTLS, and RBAC to ensure secure external data access.
• Design and optimize relational (PostgreSQL) and non-relational (Elasticsearch, Redis) data store interactions.
• Containerize applications with Docker and deploy to Kubernetes on AWS in coordination with the DevSecOps team.
• Ensure all code meets DISA STIG requirements and addresses the OWASP Top 10 throughout the development lifecycle.
• Integrate with GitLab CI/CD pipelines and Helm charts for deployment across environments.
• Conduct code reviews, provide technical guidance for junior developers, and serve as the SME for third-party API integration.
• Maintain technical documentation, API specifications, and integration guides.
Qualifications:
Required:
• Current TS/SCI clearance with Polygraph.
• Bachelor’s degree in Computer Science or related field, or equivalent experience.
• 5+ years (mid-level) or 10+ years (senior-level) of full-stack software engineering experience.
• Advanced proficiency in JavaScript/TypeScript and React, including Redux and Context API.
• Strong experience building APIs with Node.js, Python (FastAPI/Flask), or Java (Spring Boot).
• Proficiency with Docker — writing Dockerfiles, building hardened images, and integrating with CI/CD pipelines.
• Familiarity with GitLab CI/CD, Helm, and Kubernetes deployment.
• Comfortable working in an agile, distributed team environment.
• Ability to travel up to 5%.
Preferred:
• Experience with data visualization libraries such as D3.js or Recharts.
• Familiarity with GraphQL federation and advanced API design patterns.
• Experience with AWS services including ECS/EKS, API Gateway, CloudFront, and RDS.
• Working knowledge of OAuth2, OIDC, mTLS, and modern API security patterns.
• Knowledge of the OWASP Top 10 and STIG-compliant development practices.
• Exposure to Elasticsearch query optimization and index management at scale.
• Familiarity with RHEL 9 hardening and STIG compliance at the OS and container level.
• Relevant certifications: AWS Developer Associate, CKAD, or CompTIA Security+.
Company:
At CACI International Inc (NYSE: CACI), our 27,000 talented and dynamic employees are ever vigilant in delivering distinctive expertise and technology to meet our customers’ greatest challenges in national security. Founded in 1962, the company is headquartered in Arlington, USA, with a team of 10001+ employees. The company is currently Late Stage.

Apply