444 api developer jobs at 253 companies in District of Columbia

1mo
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KONG/API GATEWAY SURGE ENGINEER
United States or Washington
HybridFull Time
Constellation West
Constellation West: A service-disabled veteran-owned women-owned small business providing cybersecurity and information solutions to federal agencies.
Expertise with Kong Enterprise or comparable API gateways, API gateway implementation and migration, gateway policies, plugin configuration, developer portals, API security; experience with Kubernetes, OpenShift, Docker, GitOps, CI/CD, OAuth/JWT/OpenID Connect; bachelor’s preferred.
Kong Enterprise, Kong, Apigee, IBM API Connect, MuleSoft, Azure API Management, AWS API Gateway, Kubernetes, OpenShift, Docker, GitOps, CI/CD, OAuth, JWT, OpenID Connect
2mo
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Senior Application Developer (DAAS API GW)
Washington or United States
RemoteContract
Horizon Industries
Horizon Industries: Private IT and management consulting firm delivering modernization, cybersecurity, and AI-enabled solutions to federal agencies.
5+ YOEFive+ years developing applications; experience with APIs, low-code/no-code platforms, BPMN, MuleSoft; BS in related field; 8570 IAT Level I and MuleSoft certification required; active Secret clearance.
Java, HTML, Microsoft .NET, AngularJS, JavaScript, SOAP, REST API, Web Based API, BPMN, Appian, Salesforce, Nintex, MuleSoft Anypoint Platform, Microsoft SQL Server
1w
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Senior Application Developer
Washington, District of Columbia, United States
$120k-$150k/yr OnsiteFull Time
OneGlobe
OneGlobe: Privately held IT consulting firm building Agile software and data solutions for the U.S. federal government.
10+ YOEBachelor's degree in a technical discipline, 10+ years of experience, low-code/no-code development, BPMN, APIs, Appian, Salesforce, Nintex, SQL Server, .NET, agile development, and relevant technical certification.
Application Programming Interfaces (APIs), Low-Code/NoCode Development Platform, Business Process Modeling Notation (BPMN), Appian, Salesforce, Nintex, Microsoft SQL Server, Microsoft .NET, Computer-Aided Software Engineering (CASE)
1mo
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OneStream Developer
Washington, District of Columbia, United States
$85k-$130k/yr OnsiteFull Time
Empirical
Empirical: Disadvantaged small-business CPA and federal consulting firm providing financial, audit, technology, and advisory services to government agencies.
3+ YOE3+ years OneStream development experience, bachelor's degree in related field, proficiency in VB.Net and SQL, knowledge of C#, Python, REST APIs, ERP integrations, and ability to obtain U.S. federal security clearance.
OneStream, VB.Net, SQL, C#, Python, REST API, SAP, Oracle Financials, Momentum
1d
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Generative AI Developer
White Plains or Conyers or Roanoke or Charleston or Maitland or Kingsport or Schaumburg or Lihue or Albany or Denver or Missoula or Virginia Beach or Livonia or Greenville or Richmond or Fort Lauderdale or Thomaston or Frederick or Hibbing or Miami or Appleton or Jackson or Kailua-Kona or Ridgeland or Kokomo or Irvine or Newport or Polson or Lexington or Mobile or Fort Myers or Medford or Wilmington or Bethesda or Chattanooga or Kalispell or Macon or Tampa or Overland Park or Columbia or West Palm Beach or Ashburn or Phoenix or San Antonio or Austin or Yakima or Madras or Portland or Helena or Tallahassee or Delafield or New York City or San Ramon or Southborough or Boston or San Francisco or Nashville or Fargo or Boise or Scottsdale or Spokane or Eugene or Newnan or Thomasville or Westlake or Melville or Tequesta or Canonsburg or Philadelphia or Chicago or Dublin or Jacksonville or Los Angeles or Carrollton or Atlanta or Norwalk or Southfield or Milwaukee or King of Prussia or Bismarck or San Diego or Troy or Chagrin Falls or Washington or Wenatchee or High Point or Bonita Springs or Fremont or Hardinsburg or Irving or Simi Valley or New Iberia or Walla Walla or Winston-Salem or Red Bank or Lafayette or Raleigh or Palm Beach or Golden Valley or Urbandale or Memphis or Cookeville or Vero Beach or Baton Rouge or Providence
$83k-$125k/yr RemoteFull Time
Marsh McLennan Agency
Marsh McLennan Agency: Marsh McLennan Agency is a wholly owned insurance brokerage serving middle-market businesses and individuals.
10+ YOERequires 10+ years of technology experience, Python, AI application and agentic system development, LLM platforms, RAG, vector databases, APIs, observability, and governance in production environments.
Python, LangChain, LangGraph, DSPy, Anthropic, OpenAI, GPT-4, Claude, Pinecone, Milvus, CI/CD, API, RAG
4d
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ServiceNow Developer
Washington, District of Columbia, United States
$115k-$140k/yr HybridFull Time
Koniag Advisory and Business Solutions, LLC
Koniag Advisory and Business Solutions, LLC: Alaska Native-owned management consulting firm advising federal agencies on administrative, financial, medical-office, and records-management operations.
5+ YOEBachelor's degree or equivalent experience, 5+ years in software or workflow development, 3+ years of ServiceNow development or administration, JavaScript and API experience, and ability to obtain Public Trust.
ServiceNow, Flow Designer, IntegrationHub, Service Portal, Workspace, App Engine, App Engine Studio, JavaScript, REST, SOAP, Automated Test Framework, CMDB, CSDM, ITIL, DevSecOps
2w
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AI Developer (Software Engineering, Associate)
Washington, District of Columbia, United States
$115k-$150k/yr HybridFull Time
The MIL Corporation
The MIL Corporation: Private U.S. government-services contractor providing federal agencies cyber, engineering, financial, and information-technology services.
7+ YOERequires 7+ years professional experience, 5+ years developing AI/ML, automation, data-driven, or business applications; Python or modern programming experience; APIs and integrations; BA/BS or equivalent; Secret clearance.
Python, APIs, Microsoft Azure, Power Platform, UiPath, Automation Anywhere, SQL, Git, Docker, C++
1mo
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Web Developer
Washington, District of Columbia, United States
$105k-$170k/yr HybridFull Time
Finch AI
Finch AI: AI software helping government and commercial analysts extract trusted insights from massive unstructured datasets.
3+ YOE3+ years web development experience with HTML,CSS,JavaScript/TypeScript,modern frameworks,REST APIs and Git; US citizenship required; bachelor's preferred.
HTML, CSS, JavaScript/TypeScript, React, Angular, Vue, RESTful API, Git, Node.js, Microsoft .NET, Java
2w
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Lead Developer
Harmarville or Washington or Maryland or Virginia
$120k-$128k/yr OnsiteFull Time
Food and Commercial Workers
Food and Commercial Workers: 501(c)(5) nonprofit labor union representing grocery, food-processing, retail, and healthcare workers in the United States and Canada.
7+ YOEBachelor's degree or equivalent experience, 7+ years developing full-stack web applications, and proficiency with C#, .NET Core, REST APIs, React, TypeScript, JavaScript, HTML, CSS, SQL, databases, reporting tools, and Git.
C#, .NET Core, REST APIs, React, TypeScript, JavaScript, HTML, CSS, SQL, Git, COBOL, CI/CD, Microsoft Azure, Microsoft Office
4w
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Associate Appian Developer
Largo or Dayton or Washington
RemoteFull Time
Graham Technologies
Graham Technologies: Minority-owned federal IT consulting firm delivering cloud, data analytics, cybersecurity, and modernization solutions for government agencies.
1+ YOEBachelor's degree required; 1+ years software development; experience with Appian or low-code platforms, Agile, APIs and integrations; ability to obtain Public Trust; Appian Certified Associate Developer preferred.
Appian, REST, AWS, Azure
1mo
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Custom Software Engineer Python - 6365276
Morristown or Charlotte or Dallas or Cleveland or California or Colorado or Illinois or Maine or Maryland or Massachusetts or Minnesota or New York or New Jersey or Virginia or Washington or District of Columbia
$37-$47/hr HybridFull Time
Accenture
AccentureNYSE: ACN: Global professional services delivering 360° value.
5+ YOE5+ years Python experience, Django/Flask and REST API development, SQL, Alteryx, JIRA/Octane, Agile experience, bachelor's degree, and familiarity with banking and financial datasets.
Python, Alteryx, JIRA, OpenText ALM Octane, SQL, Django, Flask, REST API, Playwright, Jenkins, Git
23h
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Software Engineer - AI & Internal Systems
Denver or Washington or Arvada or San Francisco or Nashville or Santa Fe or New Orleans or San Diego or Bozeman or New York City
$160k-$185k/yr HybridFull Time
Quindar
Quindar: Automation First. Mission Ready. Mission management software delivering a common operating picture, system-of-systems integration, and resiliency across commercial and government space missions.
Production software experience, rapid learning, AI coding tools, APIs, databases, automation, backend and frontend development, deployment, user collaboration, strong ownership, and effective communication.
SaaS, APIs, databases, LLMs, AI agents, Microsoft 401(k)
1w
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Saleforce Developer
Washington, DC, District of Columbia, United States
$79k-$185k/yr RemoteFull Time
Accenture Federal Services
Accenture Federal ServicesNew York Stock Exchange: ACN: Technology and management consulting for U.S. federal agencies.
Experience developing Salesforce solutions with Apex, Visualforce, Lightning Web Components, SOQL, APIs, integrations, testing, deployment, and maintenance. US citizenship required; technical Salesforce certifications are a bonus.
Salesforce, Apex, Visualforce, Lightning Web Components, SOQL, Salesforce APIs, REST, SOAP, Salesforce DX, Visual Studio Code
2mo
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ServiceNow Developer
Dallas or Washington or Columbia or United States
RemoteContract
BizTech Fusion
BizTech Fusion: Minority-owned IT consulting firm delivering cloud, infrastructure, communications, cybersecurity, and application services to public and private clients.
5+ YOEBachelor's degree and 5+ years ServiceNow developer/administrator experience; strong JavaScript and SQL skills; ServiceNow ITSM, Flow Designer, Integration Hub, REST API, CMDB, and platform administration experience.
ServiceNow, ITSM, CMDB, Service Catalog, Flow Designer, Integration Hub, Business Rules, Script Includes, Client Scripts, UI Policies, UI Actions, Scripted REST APIs, Import Sets, Transform Maps, ACLs, Performance Analytics, Reports, Dashboards, JavaScript, SQL, Python, HTML, CSS, React, Node.js, Express.js, REST APIs, JSON, XML, PostgreSQL, MongoDB, AWS (EC2, RDS, S3), Git, Postman, VS Code
3w
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Software Engineer, Applied AI
San Francisco or Los Angeles or Washington or San Diego or Seattle or London
$150k-$170k/yr HybridFull Time
CHAOS Industries
CHAOS Industries: Redefining modern defense with a multi-product portfolio.
2+ YOEBS/MS in a technical field, 2+ years of software development, strong Python, production systems, AI/ML integration, model evaluation, and familiarity with APIs, distributed systems, containers, CI/CD, observability, and edge deployment.
Python, APIs, CI/CD, GPU
3w
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Sharepoint Developer
Washington, District of Columbia, United States
$150k-$175k/yr OnsiteFull Time
Revolutional
Revolutional: Private federal IT consulting firm delivering AI, cybersecurity, cloud, and modernization solutions to government agencies.
5+ YOEActive Top Secret clearance with SCI eligibility, 5+ years developing enterprise SharePoint solutions, and experience with SPFx, JavaScript/TypeScript, HTML/CSS, Power Automate, Power Apps, REST APIs, or Microsoft Graph.
Microsoft SharePoint, SharePoint Framework (SPFx), JavaScript, TypeScript, HTML, CSS, Microsoft Power Automate, Microsoft Power Apps, Microsoft 365, REST APIs, Microsoft Graph, SharePoint Server, SharePoint Online, PowerShell, Azure, Azure DevOps, Microsoft Dataverse
1d
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Developer – Mid-Level
Washington, District of Columbia, United States
OnsiteFull Time
NuAxis Innovations
NuAxis Innovations: Federal IT services helping U.S. government agencies modernize technology through customer experience and human-centered design.
3+ YOE3+ years of web application development; Drupal, PHP or C#/.NET, JavaScript, HTML5, CSS3, SQL, REST APIs, Git, CI/CD, automated testing, WCAG 2.1 AA, and Agile/Scrum experience. Bachelor's preferred.
Drupal, MySQL, PACE, Cypress, PHP, C#/.NET, JavaScript, HTML5, CSS3, SQL, Git, WCAG 2.1 AA, Playwright, Selenium, AWS, Kubernetes, Drupal Webform, GitLab CI/CD, REST APIs
1mo
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Kearney Activate - Full Stack Developer
Washington or Arlington or Boston or United States
$90k-$130k/yr OnsiteFull Time
Kearney
Kearney: Global management consulting firm.
1+ YOEEarly-career full-stack developer with 1–3 years of experience or equivalent aptitude; foundational React/TypeScript and Python, SQL, Git, REST API knowledge; ability to obtain U.S. Secret clearance; strong communication and client-facing skills.
React, TypeScript, Python, FastAPI, SQL, Git, Docker, AWS, Azure, Google Cloud, CI/CD, REST API
2w
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Enterprise Applications Developer
Washington or Baltimore
$71k-$114k/yr HybridFull Time
Corus International
Corus International: Global faith-rooted nonprofit platform delivering health, humanitarian, technology, agriculture, and economic-development solutions to communities facing extreme poverty.
5+ YOEBachelor's degree or equivalent experience, 5+ years in software development, automation, and end-user support. Requires Microsoft 365, SharePoint, CI/CD, scripting, APIs, Azure, secure development, and user-facing skills.
Microsoft 365, Power Apps, Power Automate, Office Scripts, Microsoft SharePoint, Microsoft Graph, REST, SOAP, Azure AD, Salesforce, SQL, PowerShell, JavaScript, TypeScript, Python, GitHub Actions, Azure, Azure Static Web Apps, JSON, CSV, Postman, Insomnia, SAML, OAuth2, Microsoft Security Assertion Markup Language (MSAL)
1mo
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Software Engineer
Utah or Wisconsin or Alaska or West Virginia or District of Columbia or Washington or Virginia or Vermont or Texas or Tennessee or South Dakota or South Carolina or Rhode Island or Puerto Rico or Pennsylvania or Oregon or Oklahoma or Ohio or North Dakota or North Carolina or New York or New Mexico or New Jersey or New Hampshire or Nevada or Nebraska or Montana or Mississippi or Minnesota or Michigan or Massachusetts or Maryland or Maine or Louisiana or Kansas or Iowa or Indiana or Illinois or Idaho or Georgia or Florida or Delaware or Connecticut or Colorado or California or Arkansas or Arizona or Alabama or Virgin Islands, U.S. or Missouri or Wyoming
$80k-$90k/yr RemoteFull Time
Harris Computer
Harris Computer: Global provider of mission-critical vertical market software solutions.
3+ YOEBachelor\u0002s or equivalent experience, 3+ years software development, strong Java (11/17+), Spring/Spring Boot, REST API, databases, search tech, React/Next.js, and familiarity with AI-assisted development.
Java, JVM, Spring, Spring Boot, RESTful API, PostgreSQL, MySQL, MongoDB, Elasticsearch, React, Next.js, Material UI, GitHub Copilot, Claude, Cursor, ChatGPT