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Python Fastapi Developer Jobs in Seattle, WA (NOW HIRING)

CYNET SYSTEMS

Lead Python Developer

Seattle, WA · On-site

$45 - $50/hr

Python. * FastAPI. * SQL. * PostgreSQL. * Pydantic. * PyTest. * Microsoft Azure. * Azure DevOps. * ... REST APIs. * Generative AI. * Object-oriented design. * PEP 8. Qualification And Education:

VeridianTech

Python Automation Developer (Onsite)

Seattle, WA · On-site

$57.25 - $78.75/hr

Hi, Job Title: - Python Automation Developer Location: - Renton, WA / Everett, WA Full-time ... FastAPI 5. Web Scraping and HTTP: Beautiful Soup; Scrapy Must Have: 3-4 Years of Experience in ...

Visa

Staff SW Engineer

Bellevue, WA · On-site

Experience in building or enhancing developer tools. * 2+ years of backend experience with Python (FastAPI, Flask, or similar frameworks). * Production-level experience in building and deploying AI ...

Visa

Staff SW Engineer

Bellevue, WA · On-site

Experience in building or enhancing developer tools. * 2+ years of backend experience with Python (FastAPI, Flask, or similar frameworks). * Production-level experience in building and deploying AI ...

Visa

Staff SW Engineer

Bellevue, WA

Experience in building or enhancing developer tools. * 2+ years of backend experience with Python (FastAPI, Flask, or similar frameworks). * Production-level experience in building and deploying AI ...

AZX

Senior Product Engineer (AI, Full-Stack)

Seattle, WA · On-site

$140K - $230K/yr

Build the agent-facing developer experience - CLI, deploy tooling, manifests - treating coding ... or Python/FastAPI), handling auth, idempotency, pagination, race conditions, and migrations.

Ravenna Software, Inc

Sr Fullstack Engineer

Seattle, WA · On-site +1

$160K - $200K/yr

... developer experience. Technologies We Use * NextJS * React * Typescript * Python * FastAPI * TailwindCSS * Modern monorepo tooling Experience with these technologies is helpful, but strong ...

Siri InfoSolutions Inc

Gen AI Engineer

Seattle, WA · On-site

Strong Python development with FastAPI or Flask. * Experience building production-grade AI/LLM applications. * Solid SQL, data modeling, and data engineering fundamentals. * Expertise in concurrency ...

New

AZX

Forward Deployed AI Engineer (Senior)

Seattle, WA · On-site

$140K - $230K/yr

... DevOps, infrastructure, data pipelines, front end, and back end as the engagement requires - you ... Python/FastAPI backends, React/TypeScript front ends, deployment, monitoring, real test coverage ...

Adobe

Product Security Engineer

Seattle, WA · On-site

Develop and maintain platforms end to end using React, Python FastAPI, Celery, Postgres, Redis, and ... Experience with AI systems, including LLMs, prompt engineering, AI APIs like Azure OpenAI, and ...

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Python Fastapi Developer information

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How much do python fastapi developer jobs pay per hour?

As of Sep 14, 2026, the average hourly pay for python fastapi developer in Seattle, WA is $66.71, according to ZipRecruiter salary data. Most workers in this role earn between $55.00 and $75.77 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.

What are popular job titles related to Python Fastapi Developer jobs in Seattle, WA?

For Python Fastapi Developer jobs in Seattle, WA, the most frequently searched job titles are:

What job categories do people searching Python Fastapi Developer jobs in Seattle, WA look for?

The top searched job categories for Python Fastapi Developer jobs in Seattle, WA are:

Python Fastapi Developer jobs near you
Infographic showing various Python Fastapi Developer job openings in Seattle, WA as of September 2026, with employment types broken down into 2% Internship, 86% Full Time, 8% Part Time, and 4% Contract. Highlights an 76% Physical, 4% Hybrid, and 20% Remote job distribution, with an average salary of $138,762 per year, or $66.7 per hour.

Lead Python Developer

Seattle, WA • On-site

CYNET SYSTEMS
IT Services • 501 - 1,000 employees
Learn more about CYNET SYSTEMSexternal

$45 - $50/hr

Contractor

Medical, Dental, Vision, Life, Retirement

Posted 12 days ago

Key responsibilities

  • Design, develop, enhance, and support modular Python services and REST APIs for the calculation engine.

  • Translate validated building science formulas, rules, assumptions, and dependency flows into accurate, maintainable, and testable Python components.

  • Develop and integrate calculation capabilities for energy, water, materials, embodied carbon, baseline standards, scenario simulation, explainability, anomaly management, and cost-related functions.

Job description

Job Overview:

Pay Range: $45.00hr - $50.00hr

Requirement/Must Have:

  • Minimum 5+ years of professional Python development experience delivering secure, scalable, and production-quality backend applications or calculation services.
  • Strong proficiency in modern Python, object-oriented design, modular architecture, reusable libraries, type validation, dependency management, and coding standards such as PEP 8.
  • Hands-on experience developing REST APIs using FastAPI or an approved equivalent framework, including request validation, API versioning, authentication, structured error responses, and OpenAPI documentation.
  • Strong knowledge of SQL and PostgreSQL, including data modelling, queries, functions, indexing, transaction management, and performance optimization.
  • Proven ability to identify opportunities for engineering automation and productivity improvements using AI, Generative AI, intelligent agents, scripting, and developer tooling.
  • Experience with Pydantic, PyTest, importlib, caching, configuration management, and development of reusable Python utilities and packages.
  • Experience translating complex formulas, business rules, dependency graphs, or scientific models into deterministic, traceable, and testable software components.
  • Experience designing automated unit, integration, regression, and API tests, with disciplined defect analysis and test evidence.
  • Experience with Microsoft Azure services, App Service or approved container platforms, Azure DevOps, continuous integration and deployment pipelines, secrets management, logging, monitoring, and application support.
  • Strong understanding of secure software development, data protection, auditability, resilience, performance, and production support practices.

Responsibilities:

  • Design, develop, enhance, and support modular Python services and REST APIs for the calculation engine.
  • Translate validated building science formulas, rules, assumptions, and dependency flows into accurate, maintainable, and testable Python components.
  • Develop and integrate calculation capabilities for energy, water, materials, embodied carbon, baseline standards, scenario simulation, explainability, anomaly management, and cost-related functions.
  • Build reusable calculation libraries, data models, validation rules, configuration services, and version-controlled datasets using Python, FastAPI, Pydantic, SQL, and PostgreSQL.
  • Integrate calculation services with the application through well-defined API contracts, structured inputs and outputs, secure authentication, and reliable error handling.
  • Optimize calculation performance, database queries, caching, asynchronous processing, and service scalability for global usage and high-volume calculation scenarios.
  • Create and maintain automated unit, integration, regression, and API tests using PyTest or approved equivalent frameworks.
  • Maintain technical documentation, API specifications, calculation traceability, data dictionaries, setup guides, deployment notes, and support runbooks.
  • Participate in solution design, code reviews, backlog refinement, sprint ceremonies, release planning, deployment, defect resolution, and post-deployment support.
  • Implement production-grade logging, monitoring, auditability, exception handling, retries, configuration management, and operational support procedures.

Nice to Have:

  • Working knowledge of building science, energy and water efficiency, materials, embodied carbon, cost calculations, or sustainability standards is preferred.

Skills:

  • Python.
  • FastAPI.
  • SQL.
  • PostgreSQL.
  • Pydantic.
  • PyTest.
  • Microsoft Azure.
  • Azure DevOps.
  • REST APIs.
  • Generative AI.
  • Object-oriented design.
  • PEP 8.

Qualification And Education:

  • Strong verbal and written communication skills.
  • Excellent communication and presentation skills.
  • Ability to communicate effectively with stakeholders.

Benefits:

Our Benefits Include:

  • Medical, Dental, and Vision Insurance
  • 401(k) Retirement Plan
  • Health Savings Account (HSA)
  • Disability Insurance (Short-Term and Long-Term)
  • Life and AD&D Insurance
  • Paid Sick Leave (where required by applicable state or local law)
  • Supplemental Insurance Plans
  • Identity Theft Protection
  • Pet Insurance
  • Employee Wellness Programs
  • Employee Assistance Program (EAP)
  • Career Growth and Professional Development Opportunities

Disclaimer: Benefits eligibility, accrual rates, and usage limits may vary based on employment status, length of service, and work location. Paid Sick Leave is provided in strict accordance with applicable state and municipal mandates. Cynet Systems Inc. reserves the right to modify, amend, or terminate any benefit plans at any time in accordance with applicable laws.


About Cynet Systems


Founded in 2010 and headquartered in the Washington, DC metro area, Cynet Systems Inc. is a leading technology staffing and workforce solutions company serving Fortune 500 companies, government agencies, and enterprise organizations across the United States and Canada. We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and professional staffing, powered by a high-performing recruitment engine operating across North America and Asia.

As a nationally and locally certified Minority Business Enterprise (MBE), Cynet Systems is committed to helping organizations build high-performing teams while empowering professionals to grow rewarding careers. Our organization is certified to ISO 9001, ISO 14001, ISO 27001, and SOC 2 Type II standards, reflecting our commitment to quality, security, operational excellence, and customer success.

Cynet Systems logo

About Cynet Systems

Sourced by ZipRecruiter

Cynet Systems Inc is a staffing and recruiting corporation nestled in Ashburn, VA, USA. Established in 2010, the company operates within the Information Technology and Services sector, specializing in providing effective workforce solutions to different business needs, including IT consulting, direct hire, and contract staffing services. Through the years, Cynet Systems has built an impressive portfolio, going beyond borders and expanding its operations internationally in Canada and India. Rooted in its core values of teamwork, leadership, and commitment, Cynet Systems helps businesses unlock their full potential by providing versatile and competent professionals that perfectly align with their needs. Fueled by their unwavering mission to deliver top-tier talent to businesses worldwide, Cynet Systems garnered various recognitions including SIA's fastest-growing staffing firms and Best Place to Work in Virginia for 2019.

Industry

It services

Company size

501 - 1,000 Employees

Headquarters location

Sterling, VA, US

Year founded

2010

Social media

Twitter

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