API Developer jobs in District of Columbia

Senior Node.js API Developer with GraphQL

Sterling, Virginia

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3d ago

Position: Senior Node.js API Developer with GraphQL Locations: Sterling, VA and Nashville, TN. Onsite from Day1 at either of the location. We are seeking a highly experienced Senior Node.js API Developer with expertise in building and maintaining scalable, secure, and efficient backend systems. The ideal candidate will be responsible for designing, developing, and optimizing RESTful APIs and microservices, collaborating with cross-functional teams to deliver high-quality solutions, and ensuring

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Third Party

Python API Developer

Hybrid in McLean, Virginia

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4d ago

Job Position: Python API Developer Location: McLean/ Richmond VA - 3 days Hybrid Duration: 12 Months About the Role: We re seeking a skilled Python API Developer with strong hands-on experience in building scalable APIs and integrating AI/ML solutions. The ideal candidate should be proficient in AWS cloud services and comfortable working in modern agile teams. Exposure to Vue.js for front-end integration is a plus. Responsibilities: Design, develop, and maintain robust Python APIs.Integrate AI/M

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Contract, Third Party

Depends on Experience

Software Engineer API Developer

Washington, District of Columbia

•

Today

Job ID: 2510564 Location: WASHINGTON, DC, US Date Posted: 2025-10-06 Category: Software Subcategory: SW Engineer Schedule: Full-time Shift: Day Job Travel: No Minimum Clearance Required: TS/SCI with Poly Clearance Level Must Be Able to Obtain: None Potential for Remote Work: Yes Description SAIC is seeking Software Engineer API Developers to join the Machine-assisted Analytic Rapid-repository System (MARS) Advanced Development Operations (DevOps) and Sustainment Support (ADOS) program

Full-time

USD 80,001.00 - 120,000.00 per year

API Developer

Remote

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2d ago

Role: API Developer Required Skills: Strong experience with Java (Java 8 or higher) and object-oriented programming principles.Proficiency in API design and development (REST, SOAP) with knowledge of HTTP and SOAP ProtocolsExperience with Spring Framework (Spring Boot, Spring MVC).Strong understanding of microservices architecture.Knowledge of database technologies (SQL/NoSQL) like MySQL, PostgreSQL, etc. PostgreSQL is preferred.Experience with cloud platforms (AWS, Azure, Google Cloud Platform)

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Full-time

$80,000 - $100,000

FIX API Developer

Remote

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30+d ago

Role :: FIX API Developer Location :: Remote / Raleigh, NC Type :: Fulltime Job Description Implementing FIX connectivity: This involves setting up and configuring connections between trading systems using the FIX protocol, ensuring proper session management (logon, heartbeat, logout), and handling message sequencing. Developing and integrating trading applications: Building applications that interact with various financial institutions using FIX messages to send orders, receive execution report

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Full-time

$100000 - $120000

Java API Developer

Remote or Almont, Colorado

•

Today

Description: **Remote** Join a dynamic team with a major healthcare organization, focusing on enhancing and maintaining APIs. The teams are involved in cloud migration, data governance, and leveraging AI tools to increase productivity. They work closely with both legacy systems and modern cloud platforms to deliver efficient solutions. Due to client requirement, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes M

Contract

Compensation information provided in the description

Middleware Integration Senior API-SOA Developer

Remote or Houston, Texas

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Today

Date Posted: 2025-10-20 Country: United States of America Location: UTTX1: Corp Remote Office TX Remote Location , Houston, TX, 77064 USA Position Role Type: Remote U.S. Citizen, U.S. Person, or Immigration Status Requirements: Security Clearance: None/Not Required RTX Corporation is an Aerospace and Defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses - Collins Aerospace Systems

Full-time

USD 101,000.00 per year

AWS Java Full Stack Developer (React JS)

McLean, Virginia

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16d ago

AWS Java Full Stack Developer (React JS) Location: Onsite (McLean, VA) Employment Type: W2 Experience: 10+ years preferred About the RoleWe are seeking a passionate and experienced AWS Java Full Stack Developer with a strong background in React JS, Java Spring Boot, and AWS cloud services. This role is ideal for engineers who thrive on building end-to-end, scalable, cloud-native applications that combine clean backend architecture with interactive, high-performance frontends. You will be part of

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Contract

Depends on Experience

Web API Developer

Remote or Somerville, Massachusetts

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Today

Site: Mass General Brigham Incorporated Mass General Brigham relies on a wide range of professionals, including doctors, nurses, business people, tech experts, researchers, and systems analysts to advance our mission. As a not-for-profit, we support patient care, research, teaching, and community service, striving to provide exceptional care. We believe that high-performing teams drive groundbreaking medical discoveries and invite all applicants to join us and experience what it means to be par

Full-time

CJA Developer - Remote. Must have strong experience in Strong expertise in Adobe Customer Journey Analytics (CJA) and Analysis Workspace, AEP datasets, schemas, and connections, SQL, data transformation, and API integration.

Remote

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10d ago

Role: CJA Developer Location: Remote Roles/Responsibilities: 12+Years Configure and manage CJA connections, data views, and metrics. Integrate data from AEP and other systems into Customer Journey Analytics. Build dashboards and visualizations using Analysis Workspace. Ensure data accuracy, validation, and consistency across channels. Collaborate with business stakeholders to define KPIs and reporting needs. Optimize performance of queries and visualizations. Skillset: Strong expertise in Adob

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Contract, Third Party

Depends on Experience

Senior AWS Full Stack Developer

Hybrid in Reston, Virginia

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3d ago

Senior AWS Full Stack Developer Location: Reston, Virginia (3 days per week onsite) Client Note: Interview in person at the Reston Town Center office is MANDATORY Senior AWS Full Stack Developer with a strong background in both front-end and back-end development. The ideal candidate will have expertise in Services development with Spring Boot, Front end development with Angular, and AWS services. This role requires a hands-on technologist who can design, develop, and deploy scalable applications

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Full-time

Depends on Experience

Sr COBOL DB2 Mainframe Developer (with API & MQ) - Healthcare domain

Remote

•

5d ago

NO 3RD PARTIES Job Title: Senior Software Engineer - Mainframe COBOL/DB2 Development Location: REMOTE Job Type: Contract - Fortune 10 Company - Healthcare/Insurance Overview: Overview: We are seeking a highly skilled Senior Software Engineer / Mainframe Developer with expertise in COBOL andDB2 development, with a solid understanding of MQ and API technologies. The ideal candidate will have experience in the healthcare industry, preferably in insurance, and be well-versed in Agile methodologies.

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Contract

$0+

API Documentation Engineer

Arlington, Virginia

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2d ago

API Documentation Engineer Mid-Senior Consultant Documents APIs and payload specifications ensuring OpenAPI 3.0 alignment and data model consistency. <>Key Responsibilities Create and maintain Swagger/OpenAPI specifications and developer guides. Work with developers to validate API endpoints and payloads. Perform schema validation and ensure data model compliance. <>Required Expertise 5 8 years in API documentation or software integration. Mandatory: Health IT or healthcare interoperability

Part-time, Full-time, Contract, Third Party

Node.js Developer

Hybrid in Sterling, Virginia

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27d ago

Job Description: We are seeking a highly experienced Senior Node.js API Developer with over 7 years of expertise in building and maintaining scalable, secure, and efficient backend systems. The ideal candidate will be responsible for designing, developing, and optimizing RESTful APIs and microservices, collaborating with cross-functional teams to deliver high-quality solutions, and ensuring the performance and security of our backend infrastructure. Key Responsibilities: Design, develop, and mai

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Contract

$60 - $65

Senior Java Backend Developer

McLean, Virginia

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3d ago

Position: Senior Java Backend Developer Location: McLean, VA (Onsite) Work Type: C2C Experience: 10+ Years PETADATA is seeking a seasoned Senior Java Backend Developer with over 10 years of experience in designing and building robust, scalable, and secure backend systems. The ideal candidate will bring deep expertise in Java, particularly with frameworks like Spring Boot, and have strong experience in microservices architecture, API development, and enterprise-grade application development.

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Full-time, Contract, Third Party

Senior API Platform Software Engineer

Hybrid in Arlington, Virginia

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Today

Job Number: R0225126 API Platform Software Engineer, Senior The Opportunity: As a back-end developer, you know that a good site or system needs the right combination of clean code, APIs, analytics, and infrastructure to develop a user-focused solution. We're looking for an experienced back-end developer with the software engineering skills it takes to identify potential risks, contribute to solution development, and create efficient and effective systems for our clients. As a back-end developer

Full-time

USD 86,800.00 - 198,000.00 per year

Golang Developer with AWS Expertise

Remote

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10d ago

Job Title: Golang Developer with AWS Expertise Location: Remote Duration: Contract Required Qualifications: Golang development experience. Strong understanding of microservices architecture and concurrent programming in Go. Hands-on experience with AWS cloud platform particularly with ECS/EKS, Lambda, S3, RDS, DynamoDB, API Gateway, and CloudWatch. Experience with Docker and Kubernetes for containerization and orchestration. Proficiency with Git, CI/CD pipelines, and automated deployments. Famil

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Contract

Depends on Experience

Distinguished Engineer - API Platform (GraphQL)

McLean, Virginia

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Today

Distinguished Engineer - API Platform (GraphQL) As a Distinguished Engineer at Capital One, you will be a part of a community of technical experts working to define the future of banking in the cloud. You will work alongside our talented team of developers, machine learning experts, product managers and people leaders. Our Distinguished Engineers are leading experts in their domains, helping devise practical and reusable solutions to complex problems. You will drive innovation at multiple leve

Full-time

USD 263,900.00 - 301,200.00 per year

Facets Developer with CareAdvance

Remote

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3d ago

FHIR/API/Facets developer, 8+ years of experienceClinical CareAdvance experience, client didn t say how extensive but the more the better to be safe.

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Contract

Depends on Experience

API Software Engineer

Remote or Rock Island, Illinois

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Today

Description Are you passionate about building engineering automation tools and working with cutting-edge technology? A growing team is looking for a Revit API Software Engineer to help develop and enhance a robust library of applications that streamline design workflows. Call or email Shania Lewis to apply (email is on LinkedIn). Responsibilities: Develop and maintain the codebase for Revit Layer applications, ensuring high-quality standards. Participate in development meetings, offering techni

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Full-time

USD 90,000.00 - 115,000.00 per year

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API Developer jobs in Washington, DC, USA