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Senior Fastapi Developer Jobs in Ashburn, VA (NOW HIRING)

MBR Partners

Senior Software Engineer

Washington, DC · Remote

$150K/yr

With a back-end team in the Philippines, I'm currently hiring for a Senior Software Engineer ... FastAPI Experience with React, Redux (RTK), CSS modules Experience with CI/CD, Clouds (AWS/GCP ...

HawkEye 360

Senior Software Engineer

Herndon, VA · On-site

$125K - $165K/yr

HawkEye 360 is currently seeking a Senior Command & Control Software Engineer to join the Space ... FastAPI or Spring Boot. • Experience with asynchronous messaging like Apache Kafka. • ...

Saxon Global

Sr. Python Developer

Washington, DC · On-site

$137K - $185K/yr

Job Title Design & build production-grade services and APIs (FastAPI / Django / Flask) using clean, well-tested Python. Architect scalable systems (microservices, event-driven patterns, async I/O ...

Lateral Insights LLC

Senior AI/ML Engineer

Great Falls, VA · Remote

$105K - $145K/yr

Senior AI/ML Platform Engineer Position Overview We are looking for an experienced Senior AI/ML ... Experience developing RESTful APIs and ML inference services using FastAPI * Solid understanding of ...

ECS

Senior Backend/API Engineer

Falls Church, VA · On-site

Everforth ECS is seeking a Senior Backend/API Engineer to work in the National Capital Region ... Envoy, FastAPI, Flask, container orchestration platforms, API gateways, and enclave-approved ...

Seekr

Senior AI Solutions Engineer

Reston, VA

$57.50 - $74/hr

Capable of developing prototype solutions using common tools (e.g., FastAPI, React) * Familiar with generative AI concepts like RAG, prompt engineering, agents, structured output, multi-modal LLMs ...

Bridge Core (BCore)

Full-Stack Developer

Mclean, VA · On-site

Senior Labor Category: Minimum 8 years of experience with a Bachelor's degree; or 7 years of ... Strong experience with JavaScript (Hono.js) and Python (fastapi) * Strong experience with ...

Peraton

Senior AI/ML Software Engineer

Herndon, VA

$146K - $234K/yr

Responsibilities Peraton Labs is seeking a Senior AI/ML Software Engineer to join the Labs Agentic ... Develop full-stack product features (FastAPI + React) that surface AI capabilities to users - from ...

Peraton

Senior AI/ML Software Engineer

Herndon, VA · On-site

$146K - $234K/yr

Responsibilities Peraton Labs is seeking a Senior AI/ML Software Engineer to join the Labs Agentic ... Develop full-stack product features (FastAPI + React) that surface AI capabilities to users - from ...

Peraton

Senior AI/ML Software Engineer

Reston, VA · On-site

$146K - $234K/yr

Responsibilities Peraton Labs is seeking a Senior AI/ML Software Engineer to join the Labs Agentic ... Develop full-stack product features (FastAPI + React) that surface AI capabilities to users - from ...

Peraton

Senior AI/ML Software Engineer

Herndon, VA · On-site

$146K - $234K/yr

Responsibilities Peraton Labs is seeking a Senior AI/ML Software Engineer to join the Labs Agentic ... Develop full-stack product features (FastAPI + React) that surface AI capabilities to users - from ...

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Senior Fastapi Developer information

See Ashburn, VA salary details

$15

$63

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How much do senior fastapi developer jobs pay per hour?

As of Jul 5, 2026, the average hourly pay for senior fastapi developer in Ashburn, VA is $63.13, according to ZipRecruiter salary data. Most workers in this role earn between $53.61 and $70.82 per hour, depending on experience, location, and employer.

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 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 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.
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Senior Fastapi Developer jobs near you

Senior Software Engineer

MBR Partners

Washington, DC • Remote

$150K/yr

Full-time

Posted 9 days ago

Job description

We are currently hiring for our clients scale up of a software business. With a back-end team in the Philippines, I’m currently hiring for a Senior Software Engineer / Staff Engineer to join our client's startup where they are already No1 order-taking system for drive-thrus. They are already operating at scale with high-volume QSRs, achieving over 93% order completion and 96% accuracy, and growing rapidly with the largest number of voice AI drive-thru deployments in the market.
Their backend is developed in Python running in the cloud over k8s. It's not a typical backend interacting with a UI frontend, handling audio streams in real-time. their systems integrate with a large number of third party services. There are a number of challenges, and as in any fast-paced startup, each team member gets to experience a lot of professional growth and ownership.
Responsibilities

Integrate with new POS systems and digital menu boards
Build data pipelines to process restaurant menus
Support existing integrations and pipelines
Debug and solve complex customer issues
Lead communication with integration partners to deliver the integrations
Estimate, plan and deliver the integration projects
Handle a large set of complex and diverse customer issues
Create documentation for integrations
Qualifications:
5+ years experience in Python and JavaScript
Strong backend development and software architecture skills
Experience in developing and deploying multiple projects used in production
Proficient with Async IO, FastAPI
Experience with React, Redux (RTK), CSS modules
Experience with CI/CD, Clouds (AWS/GCP/Azure), Linux, Docker, Kubernetes,
3rd Party API integrations
Experience with Data Pipelines, ETL
Prior experience working in startups
BSc in Software Development or equivalent industry experience
1+ years of experience in technical leadership
This role is a Global remote role, ideally US or Europe ( NO Applications from India / Pakistan ) EST Timezone