300 sr api developer jobs at 177 companies in District of Columbia
1mo
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Senior Application Developer (DAAS API GW)
Washington or United States
RemoteContract
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
3mo
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Sr. Product Engineer – Web Services
Vienna or Redlands or Washington or United States
$94k-$159k/yr HybridFull Time
5+ YOE5+ years product-focused; Agile; REST APIs; cloud-native; strong communication; autonomy with cross-team collaboration; BS in CS/GIS/Information Science or related field.
Python, JavaScript, TypeScript, SQL, ArcGIS REST APIs, ArcGIS Hub, ArcGIS Maps SDKs, CI/CD, DevOps
3w
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Sr. Backend Engineer (.NET Core)
Washington or Falls Church
RemoteFull Time
6+ YOE6+ years backend development with 4+ years .NET Core/C#, experience leading offshore teams, Azure SQL, Azure Service Bus, Azure API Management, CI/CD with Azure DevOps and Veracode, API and microservices design.
.NET Core, C#, Azure SQL, Azure Service Bus, Azure API Management (APIM), Azure DevOps, Veracode, React, Oracle Fusion Cloud, Claude Code, GitHub Copilot, Cursor
2w
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ServiceNow Technical Lead / Sr. Developer
Austin or Washington
$145k-$190k/yr HybridFull Time
10+ YOEBachelor's degree,10+ years experience with 3+ in Agile,advanced ServiceNow development skills,JS and Glide APIs,ICM experience,Flow Designer,IntegrationHub,ATF,REST/SOAP integrations,and ability to obtain Public Trust clearance.
ServiceNow, JavaScript, Glide APIs, Script Includes, App Engine Studio, Flow Designer, IntegrationHub, Workspace, UI Builder, ATF, REST, SOAP
1mo
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Sr. Full Stack Engineer
Washington, District of Columbia, United States
$91k-$185k/yr HybridFull Time
5+ YOE5+ years full stack development experience with advanced React and TypeScript, Java back-end skills, API design (REST, OAuth, JWT, OpenAPI/Swagger), microservices and async architectures; US citizenship and Secret clearance required.
React, Java, Redux, Hooks, Context API, TypeScript, RESTful API, OAuth, JWT, OpenAPI/Swagger, Python, FastAPI, Ruby on Rails, AWS
1mo
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Sr. Gateway/Platform Engineer
United States or Washington
HybridFull Time
8+ YOE8+ years API Gateway or enterprise integration experience; API security, REST, production support, and hybrid cloud knowledge; bachelor\u0002s preferred.
Kong Enterprise, Google Apigee, IBM API Connect, MuleSoft, Azure API Management, AWS API Gateway, Red Hat 3Scale, Axway, WSO2, Tyk, Kubernetes, OpenShift, Docker, OAuth 2.0, OpenID Connect, JWT, Zero Trust, TLS/SSL, Git, Linux
1mo
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Sr. Software Engineer I, Evaluation Services
Chicago or California or Colorado or Florida or Georgia or Illinois or Indiana or Minnesota or Missouri or Montana or New Jersey or New York or North Carolina or Ohio or Oregon or Pennsylvania or South Carolina or Texas or Utah or Vermont or Virginia or Washington or Wisconsin or District of Columbia
$125k-$175k/yr HybridFull Time
5+ YOE5+ years software engineering with API development and partner integrations; strong REST/WebSocket/JSON/OAuth skills; proficiency in TypeScript/JavaScript or Python; excellent troubleshooting and communication.
REST APIs, WebSockets, JSON, OAuth, Postman, curl, browser developer tools, network analyzers, TypeScript, JavaScript, Python, React, Node.js, Swagger/OpenAPI, ReadMe
14h
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Sr. Full Stack Developer I (6800)
Washington, District of Columbia, United States
$170k-$216k/yr HybridFull Time
5+ YOERequires active Top Secret clearance with SCI eligibility, 5+ years of full stack development, web and backend services experience, programming and scripting skills, REST APIs, SQL, Linux, troubleshooting, automation, and secure coding.
iOS, Android, Java, Python, JavaScript, TypeScript, HTML, CSS, PowerShell, Bash, REST APIs, PostgreSQL, Microsoft SQL Server, Linux, Cisco UC, VPN, SIP, RTP
2mo
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Sr. AI Engineer, Special Programs
Palo Alto or Washington
HybridFull Time
5+ YOE5+ years software engineering; strong Python; Bachelor's degree or equivalent; experience with AI/ML and large language models.
Python, APIs, AWS, GCP, Azure, Docker, Kubernetes
1mo
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Sr. Software Engineer (TS/SCI)
Hampton or Annapolis Junction or Alexandria or Chantilly or Washington or Reston or McLean or Herndon or Bethesda or Catonsville or Frederick or Ashburn
$144k-$268k/yr HybridFull Time
4+ YOEU.S. citizen with TS/SCI clearance (or immediate DISS eligibility), Bachelor’s degree, 4+ years Python or Java, hybrid cloud/app development, databases, ETL, algorithm design, CI/CD and stakeholder interfacing.
Python, Java, MongoDB, Celery, Azure DevOps, Jenkins, React.js, Node.js, Web API, IBM CPLEX, Gurobi, SPSS, SAS, R, PyCharm, VS Code, Jupyter Notebooks, Pandas, NumPy, Dask, Matplotlib, Seaborn, Plotly, Git, GitHub, GitLab, Docker, Podman
1mo
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Senior Lead Developer
Washington, District of Columbia, United States
HybridFull Time
8+ YOE8+ years development experience required; must develop .NET/C# applications, REST APIs, SQL Server, support CI/CD and Agile; bachelor's in CS required; ability to obtain Public Trust.
C#, ASP.NET, .NET Core/.NET, JavaScript, TypeScript, HTML/CSS, SQL Server, REST APIs, SharePoint Online, SPFx, Power Apps, Power Automate, Azure Functions, Azure DevOps, Git, Visual Studio, CI/CD, Unit Testing, Agile Scrum, Microsoft 365, SharePoint
6d
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Senior Software Developer
Washington, District of Columbia, United States
$106k-$164k/yr RemoteFull Time
10+ YOEBachelor's degree and 10+ years in enterprise software development, including 5+ years independently designing architectures. Requires AWS, full-stack development, APIs, Docker, DevSecOps, and leadership expertise.
Node.js, Python, Java, JavaScript, AWS, Amazon EC2, Amazon ECS, Amazon EKS, AWS Lambda, Amazon API Gateway, Amazon RDS, Microsoft SQL Server, PostgreSQL, Amazon S3, AWS IAM, Amazon CloudWatch, Amazon SNS, Amazon SQS, AWS Secrets Manager, Amazon VPC, OpenAPI, Swagger, Docker, Kubernetes, OpenShift, Terraform, AWS CloudFormation, ArcGIS, ESRI, GitHub Copilot, ChatGPT Enterprise, Amazon Q, Claude
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
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
3mo
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Senior Software Developer
Washington, District of Columbia, United States
$155k-$165k/yr OnsiteFull Time
7+ YOE7+ years software development; frontend in JavaScript/React/TypeScript; Python backend; AWS (Lambda, API Gateway, AppSync, DynamoDB, RDS, CloudFormation); REST/GraphQL APIs; CI/CD; SQL; testing.
AWS, Lambda, API Gateway, AppSync, DynamoDB, RDS, CloudFormation, REST, GraphQL, SQL, CI/CD, Git
1mo
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ServiceNow Developer
Dallas or Washington or Columbia or United States
RemoteContract
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
1w
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Sr AI/ML Engineer Remote Nationwide or Hybrid in MN or DC or CT
Hartford or Minneapolis or Washington or United States
$120k-$215k/yr RemoteFull Time
8+ YOEBachelor's or equivalent, 8+ years software engineering experience, 2+ years building/deploying AI/ML systems, experience with generative AI and RAG, API/microservices experience, strong communication and problem-solving.
GPT-based models, Retrieval-Augmented Generation (RAG), MLOps, API, microservices
1mo
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Sr Full Stack Software Engineer
Chicago or Washington or Baltimore or Louisville or Dallas or Frisco or Kentucky
$107k-$147k/yr RemoteFull Time
4+ YOEBachelor's in CS or equivalent, 4+ years software engineering including Python, 2+ years with Angular/React/Vue or Java/Node.js, cloud and microservices experience, REST API and testing skills.
Java, JavaScript, HTML, PHP, C#, Python, Angular, React, Vue.js, Node.js, Microsoft Azure, AWS, Google Cloud Platform (GCP), Kubernetes, REST APIs, SASS, W3C Web Standards
2mo
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Software Engineer (CAMITS Application)
Washington, District of Columbia, United States
$100k-$200k/yr HybridFull Time
10+ YOEBachelor's in Computer Science or equivalent, 10+ years software development, proficiency with SQL Server, Web API, C#/C++, web UI frameworks, Google Cloud preferred, Crystal Reports, and Microsoft Office suite; U.S. citizenship required.
SQL Server, SQL, Web API, C#, C++, Crystal Reports, Google Cloud, Microsoft Outlook, Microsoft Word, Microsoft Excel, Microsoft SharePoint, Microsoft PowerPoint
1mo
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Application Developer
Washington, District of Columbia, United States
OnsiteFull Time
5+ YOE5+ years experience; deep Python knowledge; familiarity with R, SAS, SQL, AWS and ArcGIS products; experience with APIs, Snowflake, Tableau/Power BI, Jira/GitHub; US citizenship and ability to obtain Public Trust clearance; bachelor’s in related field.
Python, R, SAS, SQL, AWS (Amazon Web Services), ArcGIS, ArcGIS Online, ArcGIS Pro, Snowflake, Tableau, Power BI, Jira, GitHub, APIs
1w
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Sharepoint Developer
Washington, District of Columbia, United States
$150k-$175k/yr OnsiteFull Time
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
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