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Senior Fastapi Developer Jobs in Washington (NOW HIRING)

Expression

Senior AI Platforms Engineer

Washington, DC · On-site

$180K - $210K/yr

Expression is seeking an experienced Senior AI Platform Engineer to join our Product Team and ... Develop high-performance Python APIs and scalable backend services using FastAPI, asynchronous ...

Expression

Senior AI Platforms Engineer

Washington, DC · On-site

$180K - $210K/yr

Expression is seeking an experienced Senior AI Platform Engineer to join our Product Team and ... Develop high-performance Python APIs and scalable backend services using FastAPI, asynchronous ...

Vantor

Senior Software Engineer

Arlington, VA · On-site

$141K - $186K/yr

They are seeking a Senior Software Engineer to develop high-performance API-driven services and ... Preferred : • Experience with Spring Boot, Flask, FastAPI, Django, or similar frameworks. • ...

Doist

Senior Python Engineer

Arlington, VA · On-site

$118 - $163/hr

Experience with Django, Flask, or FastAPI . * Experience in object-oriented methodologies, design ... Experience with DevOps tools like Jenkins, GitLab CI/CD, or AWS Lambda. * Familiarity with GenAI ...

NewGen

Full Stack Developer

Chantilly, VA · On-site +1

... in Flask, Django, FastAPI; including developing associated testing (unit and integration ... Senior Recruiter bmorris@newgentechnologies.com www.newgentechnologies.com

Zetier

Full-Stack Engineer

Arlington, VA · Hybrid

Senior Full-Stack Engineer Zetier is seeking a senior full-stack engineer to build modern, secure ... Flask, FastAPI) * Familiar with responsive design frameworks (Bootstrap, Material) * Practical ...

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Senior Fastapi Developer information

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.

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

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.

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Senior Fastapi Developer jobs near you

26-3103: Senior Full Stack Software Developer - McLean, VA

Navitas Business Consulting

Herndon, VA • On-site

Full-time

Posted 15 days ago

Job description

Senior Full Stack Software Developer 
Job ID#: 26-3103
Clearance: N/A
Location: McLean, VA
Who We Are:
Since our inception back in 2006, Navitas has grown to be an industry leader in the digital transformation space, and we’ve served as trusted advisors supporting our client base within the commercial, federal, and state and local markets.
What We Do:
At our very core, we’re a group of problem solvers providing our award-winning technology solutions to drive digital acceleration for our customers! With proven solutions, award-winning technologies, and a team of expert problem solvers, Navitas has consistently empowered customers to use technology as a competitive advantage and deliver cutting-edge transformative solutions.
Role Overview
Our client currently operates a Java/Spring Boot‑based environment and is now transitioning core backend services to Python. We are seeking a developer with strong Java experience who can lead and support the migration toward Python frameworks such as Django, FastAPI, and Flask.
This role is ideal for someone who has worked extensively in Java and is now proficient in Python, capable of building new services while modernizing existing ones.
What You Will Do
  • Work on existing backend services built in Java + Spring Boot
  • Lead the transition and development of new services using Python (Django / FastAPI / Flask)
  • Build scalable REST APIs and microservices in both Java and Python during the migration phase
  • Design and optimize database schemas using PostgreSQL
  • Implement and maintain AWS CI/CD pipelines for automated deployments
  • Develop and maintain test automation frameworks for both Java and Python codebases
  • Collaborate with architects, DevOps, QA, and product teams to ensure smooth migration
  • Troubleshoot, debug, and optimize application performance across both stacks
  • Ensure best practices in security, cloud-native development, and code quality
Required Skills & Experience
  • 7–10 years of backend development experience
  • Strong hands-on experience with Java + Spring Boot
  • Solid experience with Python and at least one major framework:
    • Django
    • FastAPI/Flask
  • Strong knowledge of SQL & PostgreSQL
  • Experience with AWS services and CI/CD pipelines
  • Hands-on experience with test automation (PyTest, JUnit, Selenium, etc.)
  • Experience building REST APIs and microservices
  • Ability to work in an onsite, fast-paced environment

Salary: $130,000 - $150,000

The pay range provided is a good-faith estimate and represents the range the company reasonably expects to pay for this position at the time of posting. Individual compensation may vary based on skills, experience, education, certifications, geographic location, and business needs.

Equal Employer/Veterans/Disabled

Navitas Business Consulting is an affirmative action and equal opportunity employer. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact Navitas Human Resources.

Navitas is an equal opportunity employer. We provide employment and opportunities for advancement, compensation, training, and growth according to individual merit, without regard to race, color, religion, sex (including pregnancy), national origin, sexual orientation, gender identity or expression, marital status, age, genetic information, disability, veteran-status veteran or military status, or any other characteristic protected under applicable Federal, state, or local law. Our goal is for each staff member to have the opportunity to grow to the limits of their abilities and to achieve personal and organizational objectives. We will support positive programs for equal treatment of all staff and full utilization of all qualified employees at all levels within Navitas.

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