Fast api jobs in mclean, va

React.Js Web Developer (Fast API, Python)

Remote

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14d ago

Job Title: React.js. Web Developer (Fast API, Python)Location: Remote Key ResponsibilitiesDesign, develop, and maintain responsive web applications using React.js.Build and maintain high-performance REST APIs using FastAPI and Python.Integrate front-end applications with backend services and third-party APIs.Develop reusable UI components and ensure responsive design.Optimize application performance, scalability, and security.Write clean, maintainable, and well-documented code.Collaborate with p

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Contract, Third Party

Depends on Experience

Senior Python / AWS Developer - W2 Only

McLean, Virginia

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8d ago

Senior Python / AWS DeveloperIntroduction:We are seeking an experienced Python Developer to design, build, and scale cloud-native applications, microservices, and system integrations. The candidate will collaborate closely with engineering teams on API architecture, cloud infrastructure, and automated workflows. Responsibilities:Design, develop, and maintain high-performance microservices and RESTful APIs using Python FastAPI.Deploy, manage, and optimize scalable application environments on AWS

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Contract

Depends on Experience

IT Application Solutions Architect Senior - Full Stack

Hybrid in Washington, District of Columbia

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23d ago

Title:IT Application Solutions Architect Senior - Full StackLocation: Washington, DC (Hybrid) (There can be F2F interview)Hire Type: ContractJob Description:Highly Proficient in Angular. Strong programming experience in Java and Python.Extensive experience in developing Spring Boot microservices and RESTful APIs.Hands-on expertise with AWS services: AWS Lambda, Amazon DynamoDB, Amazon ECS (Elastic Container Service) Knowledge of AWS services such as API Gateway, SQS, SNS, VPC, Event Bridge and S

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Contract

Depends on Experience

Solution Architect (Full Stack)

Hybrid in Washington, District of Columbia

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Today

Job Title: Solution Architect (Full Stack) Location: Washington, DC/Onsite Interview Duration: 12+ Months Minimum Qualifications: Highly Proficient in Angular. Strong programming experience in Java and Python. Extensive experience in developing Spring Boot microservices and RESTful APIs. Hands-on expertise with AWS services: AWS Lambda, Amazon DynamoDB, Amazon ECS (Elastic Container Service) Experience on AWS services such as API Gateway, SQS, SNS, VPC, Event Bridge and Secrets Manager Experien

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Third Party, Contract

$60+

Java Tech Lead

McLean, Virginia

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Today

Java Tech Lead 14+ Years of Experience Responsibilities: * Provide technical solution * Design and develop scalable backend services and RESTful APIs * Work on frontend integration with Angular * Write and maintain automated test suites (UI, API & BDD) * Drive TDD/BDD practices across the team * Participate in code reviews, technical design, and sprint planning * Troubleshoot and resolve production issues Required Skills: * 15+ years of Java development and technical lead experience * Strong e

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Contract, Third Party

Depends on Experience

- Full Stack Developer IV (Java) - DC, GA, TX, WA (Hybrid)

Hybrid in Washington, District of Columbia

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16d ago

local to DC, GA, TX, WA Position: Full Stack Developer IV Java Location: DC; GA; TX; WA (Hybrid) Eligibility: U.S. Citizen residing in the U.S.; Ability to obtain Public Trust Job Summary: Seeking a senior Full Stack Java Developer to design, develop, test, and maintain secure, scalable enterprise web applications using Java and the Spring ecosystem. Key Responsibilities: Develop full-stack applications using Java, Spring Boot, Spring MVC, and Spring Security. Build RESTful

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Contract, Third Party

Depends on Experience

Senior Software Engineer – Java / AWS

Tysons, Virginia

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17d ago

We are looking for a Senior Software Engineer with strong experience in Java, AWS, microservices, and modern cloud-based application development. The ideal candidate will be hands-on technically and capable of contributing to architecture, system design, performance optimization, and production support. ResponsibilitiesDesign, develop, and support scalable enterprise applications and distributed systems.Build and enhance cloud-native solutions using AWS services.Develop RESTful APIs and microser

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Contract, Third Party

Depends on Experience

Software Developer

McLean, Virginia

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Today

Software DeveloperPractice: Software Development & Support / Digital Company: Guidehouse Location: RemoteSecurity and Work Authorization Requirements Must be able to obtain and maintain a Federal or Department of Defense Public Trust. Candidates must receive approved Public Trust adjudication before onboarding with Guidehouse. Candidates with an active Public Trust or current Federal suitability are preferred. Must be authorized to work in the United States without sponsorship.Position Overvi

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Contract

Depends on Experience

C#/.Net Software Engineer

Hybrid in North Bethesda, Maryland

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Today

C#/.Net Software Engineer Rockville, MD hybrid (2 days a week onsite) $105-110K This is an engineering role that works as part of the software engineering team towards the development and deployment of enterprise and informatics software systems to support cancer clinical trials and research. The role provides a strong career growth opportunity in an innovative technology environment working in one of our nation's premier research organizations. Responsibilities: Manage individual task prior

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Full-time

Depends on Experience

Senior Java Software Engineer

Hybrid in McLean, Virginia

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Today

Varmoda is seeking an experienced Senior Java Software Engineer to support U.S. federal government projects. The ideal candidate will bring strong hands-on Java development experience, expertise in enterprise application development, and prior experience supporting federal government clients or programs. The successful candidate will design, develop, test, and maintain secure, scalable, and high-performance enterprise applications while collaborating with technical teams and federal stakeholders

Contract

100000 - 120000

Test Engineering Analyst-ML/AI Chatbot

Hybrid in Laurel, Maryland

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6d ago

Absolutely no third parties please !! This position is a hybrid opportunity (1-2x onsite per week in Maryland and/or Wash DC office). Our direct client is seeking a Machine Learning, AI Chatbot Test Engineering Analyst to our client's team to drive innovation in AI-powered division leveraging Chatbots within their proprietary platform for external information. This is a great opportunity to work with cutting-edge AI and automation technologies. We are seeking a Test Engineer/SDET with 5+ years

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Contract

Software Engineer, Senior

McLean, Virginia

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Today

At Freddie Mac, our mission of Making Home Possible is what motivates us, and it's at the core of everything we do. Since our charter in 1970, we have made home possible for more than 90 million families across the country. Join an organization where your work contributes to a greater purpose. Position Overview Are you a seasoned software engineer looking for an opportunity work with a variety of technology and make a meaningful contribution to the team? We have an opportunity to join in New

Full-time

USD 129,000.00 - 193,000.00 per year

Sr. Automation Test Engineer

Fairfax, Virginia

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Today

Job#: 3055302 Job Description: We are seeking a Automation Test Engineer to lead the design, development, and optimization of enterprise-scale test automation solutions across web applications, APIs, and microservices. This hands-on technical leadership role supports mission-critical systems within the EEOC environment by driving software quality, automation maturity, and modern AI-enabled quality engineering practices. The ideal candidate will collaborate closely with Quality Assurance, Softwa

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Full-time

$49 - $57 per hour

Java Backend Engineer - Onsite Interview required

Hybrid in Vienna, Virginia

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20d ago

Job Title: Java Backend Engineer Location: Vienna,VA ONSITE INTERVIEW REQUIRED Type: Contract, long term expected Compensation:W-2 Work Model: Hybrid 3 days onsite and 2 days remote Hours: 40 hours a week Responsibilities Design, build, integrate, and maintain secure backend services and APIs supporting mobile, web, enterprise, and partner systems. Design for performance, reliability, resiliency, observability, quality, and responsiveness. Collaborate with cross-functional teams to define, de

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Contract

$70

Backend Python Engineer - Polygraph Required

Chantilly, Virginia

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Today

About the Team Here at BTI360, we've built a culture that's passionate about developing software engineers. Software doesn't build itself. People do. In fact, teams of people do. That's why our primary focus is on developing better craftsmen, better teammates, and better technical leaders. By putting people first, we're not just giving our teammates more opportunities to grow, we're also raising the bar of the software we ship. BTI360 previously has been voted 10 years in a row as a TOP Place t

Full-time

USD 114,000.00 - 247,900.00 per year

Senior Consultant, Full Stack API Developer

McLean, Virginia

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Today

**This is a hybrid role About Infinitive Infinitive is a data and AI consultancy that helps clients modernize, monetize, and operationalize their data to generate lasting value. They pride themselves on their deep industry and technology expertise, ensuring that they drive and sustain the adoption of new capabilities. Infinitive is committed to aligning their team with their clients' culture, ensuring a successful partnership by bringing the right mix of talent and skills for high return on inv

Full-time

USD 90,000.00 per year

Top Secret Java Developer/Hybrid/Ashburn/$120k

Ashburn, Virginia

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Today

A leading provider of IT consulting services is seeking two Java Developers to support a critical initiative with U.S. Customs and Border Protection (CBP). This opportunity is ideal for experienced software engineers who are passionate about building and modernizing enterprise applications that help government agencies respond to evolving business and technology challenges. This is a hybrid position based in Ashburn, VA, requiring onsite attendance 1-2 days per week. This role offers the chance

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Full-time

$110000 - $125000

Cloud Solutions Architect

Chantilly, Virginia

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Today

Job ID: 2617473 Location: Chantilly, VA, US Date Posted: 2026-09-30 Category: Software Subcategory: SW Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: TS.SCI_wPoly Clearance Level Must Be Able to Obtain: None Potential for Remote Work: ORA_ON_SITE Description SAIC is seeking a Cloud Solutions Architect to join our team to assist with application development support to maintain and enhance an existing social media data exploitation platform. This posit

Full-time

USD 200,001.00 - 240,000.00 per year

Mid-Level Backend Software Engineer

Gaithersburg, Maryland

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Today

If you've been building your skills in backend development, object-oriented programming, and mission-driven engineering, and you're ready for work that actually moves the needle, this is the kind of opportunity cleared engineers pursue when they want to grow while making real impact. If you take pride in your craft, enjoy solving meaningful technical problems, and want your work to support a mission with visibility at senior levels, you'll thrive here. We're hiring a Backend Software Engineer t

Full-time

USD 87,100.00 - 157,450.00 per year

AI/ML Engineer

Remote or Ashburn, Virginia

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Today

Xenith Solutions is a small family focused business where we focus on taking care of our employees and customers equally. We are focused on serving Federal / Civilian, Defense and Intelligence organizations with superior service. If you want to be a part of a rapidly growing business with an exceptional culture, then you want to be a part of the Xenith Solutions family. Xenith offers unmatched Benefits: 100% of Medical, Dental, and Vision benefits paid by employerFSA or HSA availableUnlimited P

Full-time

USD 115,000.00 - 165,000.00 per year

Fast api jobs in McLean, VA, USA