858 sr api developer jobs at 400 companies in Westminster, MD
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Senior Backend API Engineer
Linthicum, Maryland, United States
OnsiteFull Time
7+ YOEActive TS/SCI with polygraph required; 7+ years backend development experience with Python, RESTful APIs, Django/Flask, Docker, MariaDB/MongoDB; experience with Git, Jira, Confluence; strong troubleshooting and communication skills.
Python, Django, Flask, MariaDB, MongoDB, JSON, XML, Docker, Git, Jira, Confluence, AWS
1mo
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Application / API Lifecycle Automation Developer
Herndon, Virginia, United States
$160k-$195k/yr RemoteFull Time
5+ YOE5+ years designing and delivering API lifecycle automation, developer portals, CI/CD integrations, Zero Trust API security, and observability with documented automation metrics.
AppDynamics, ELK, OpenTelemetry, Backstage, Stoplight, Kong Dev Portal, Apigee Developer Portal, Kong, Apigee, MuleSoft, Azure API Management (Azure APIM), AWS API Gateway, CI/CD
2mo
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API/Java/Python Developer, SME TS Clearance REQUIRED
Arlington, Virginia, United States
$88k-$191k/yr OnsiteFull Time
10+ YOETS/SCI eligible with CI Poly; proficiency in Java and Python and related frameworks; API design and integration experience; database, cloud, containerization, Git, Agile experience; Bachelor's or 10+ years experience.
Java, Python, Spring Boot, Flask, Django, REST, GraphQL, SOAP, Postman, Swagger UI, PostgreSQL, MongoDB, MySQL, Git, AWS, Azure, GCP, Docker, Kubernetes
2mo
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Senior API Systems Engineer
Sterling, Virginia, United States
$150k-$254k/yr OnsiteFull Time
10+ YOEU.S. person with Top Secret/SCI polygraph clearance, 10+ years' relevant experience, Bachelor’s or Master’s in a STEM field, Security+ CE (DoDD 8140), 5+ years API gateway experience, proficiency with Java/Python/C#, cloud (AWS/Azure/GCP), Docker/Kubernetes.
Java, Python, C#, AWS, Azure, Google Cloud Platform, Docker, Kubernetes, Istio, Linkerd, MuleSoft, Apigee, Broadcom API, ServiceNow, Windows, Linux
1w
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API Technical Lead
Baltimore, Maryland, United States
OnsiteFull Time
Design and implement FHIR/HL7 APIs and enterprise integration solutions, guide architecture and standards, mentor teams, and ensure scalable, secure interoperability.
FHIR, HL7, HL7v2, X12, JSON, XML, AWS, SOA
3w
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API Developer/Data Engineer Managing Consultant-Fraud/AI
McLean or New York City or Arlington or United States
$130k-$216k/yr HybridFull Time
5+ YOEUS citizen able to obtain Public Trust,5+ years in data engineering/integration, proficiency in Python, Java/JS, .NET (C#), RESTful APIs, XML, SQL/SQL Server, GCP, data formats (JSON, Parquet), and experience leading technical teams.
Python, Java, JS, C#, .NET, RESTful API, XML, SQL Server, SQL, CSV, TXT, JSON, Parquet, GCP, Apigee, Kong, Azure API Management, AWS API Gateway, LexisNexis, Oracle Mantas, Actimize, Fircosoft, Oracle Mantas, World-Check, Dow Jones, Chainalysis, Elliptic, TRM Labs
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Senior API Solutions Architect
Arlington, Virginia, United States
OnsiteFull Time
9+ YOE9+ years in API architecture/integration; experience with enterprise API gateways, OpenAPI/Swagger, API governance, security (OAuth2/OpenID Connect/JWT/PKI), cloud-native integrations, and mentoring teams.
Apigee, Gravitee, OpenAPI, Swagger, JSON Schema, OAuth 2.0, OpenID Connect, JWT, PKI, Kubernetes, Docker, Istio, Linkerd, CI/CD
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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
2mo
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Sr Applications Developer
Silver Spring or United States
$125k-$145k/yr HybridFull Time
5+ YOE5+ years web application development; JavaScript/TypeScript; React/Angular/Vue; AWS; REST; geospatial visualization; GenAI experience.
JavaScript, TypeScript, React, Angular, Vue.js, AWS, WebGL, Canvas, Three.js, D3.js, GeoJSON, REST API, GenAI, Docker, Kubernetes
3mo
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Software Engineer 1 (API)
Linthicum Heights, Maryland, United States
$52-$107/hr OnsiteFull Time
7+ YOEU.S. citizenship and Top Secret/SCI clearance with appropriate polygraph required; 7 years SWE experience; Bachelor’s in Computer Science (or 4 additional years of SWE experience); strong Python, Django/Flask, ReST, and database skills.
Python, Django, Flask, MariaDB, MongoDB, PostgreSQL, ReST, JSON, XML, Swagger, AWS, Docker, Visual Studio Code, Jira, Confluence, Git
3w
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Sr. Software Engineer/Technical Lead
Bethesda, Maryland, United States
OnsiteFull Time
Design and implement web, application, and database architecture; develop RESTful APIs and web applications; support accessibility, security, cloud migration, CI/CD, and enterprise integrations for government systems.
Visual Studio, MVC, .NET, C#, SQL Server Data Tools, Python, Web API, Bootstrap, Angular Js, Ajax, JavaScript, CSS, JQuery, JSON, ServiceNow, nVision, NBS
2w
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Sr. User Interface Developer
Annapolis Junction, Maryland, United States
$110k-$130k/yr HybridFull Time
5+ YOEU.S. citizen with active TS/SCI+Poly, 5+ years UI development experience, Angular 20+, TypeScript, HTML/CSS, RESTful API integration, strong UX/Accessibility skills.
Angular 20, Pega Constellation UI, TypeScript, HTML, CSS, RESTful APIs, NX Smart Monorepos
2mo
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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
2w
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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
1mo
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Sr Software Developer
Fort Meade or Columbia
$174k-$220k/yr OnsiteFull Time
Expert in Java, JavaScript, and Python; experienced in AWS serverless (API Gateway, Lambda, Secrets Manager, Parameter Store, Step Functions), DynamoDB/Aurora PostgreSQL, CI/CD (Jenkins, GitHub, CodePipeline), Agile, corporate authentication integration, caching, and multi-source data integration.
Java, JavaScript, Python, AWS, API Gateway, Lambda, Secrets Manager, Parameter Store, Step Functions, DynamoDB, Aurora PostgreSQL, PostgreSQL, Jenkins, GitHub, CodePipeline, Jira, Confluence, Angular, Vue
1mo
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ServiceNow Sr. Developer / Tech Lead
Vienna, Virginia, United States
HybridFull Time
5+ YOE5+ years ServiceNow development experience; hands-on with JavaScript, Glide API, Flow Designer, IntegrationHub, REST/SOAP/MID Server integrations; ServiceNow CSA required; U.S. citizenship and ability to obtain Public Trust clearance.
ServiceNow, JavaScript, Glide API, Flow Designer, IntegrationHub, REST, SOAP, MID Server
2mo
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Sr. AI Integration Engineer
Des Moines or Ashburn or Austin or Chaska or Chicago or Dallas or Lewisville or Kansas City or Nashville or Florida or Georgia or North Carolina or New Jersey or Pennsylvania
HybridFull Time
5+ YOE5+ years in software engineering, systems integration, and AI-enabled workflow delivery; experience with enterprise integrations (ServiceNow, Salesforce), cloud deployments, Python, APIs, and middleware.
Python, JavaScript, TypeScript, Java, C#, APIs, ServiceNow, Salesforce, Kubernetes, Docker, AWS, Azure, GCP, SQL, LangChain, LlamaIndex, Semantic Kernel
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Sr Aderant Engineer
Reston or San Diego or San Francisco or Washington or Wilmington or Phoenix or Los Angeles or Houston or Boston or Austin or Atlanta or Raleigh or Baltimore or New York or Dallas or Palo Alto or Short Hills or Minneapolis or Chicago or Seattle or Philadelphia or Miami
$113k-$179k/yr HybridFull Time
5+ YOE5+ years supporting Aderant Expert and enterprise financial/practice management systems, strong backend development and SQL skills, experience with integrations/APIs, bachelor's in CS/IT, analytical and troubleshooting ability.
Aderant Expert, SQL, APIs
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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
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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