882 api developer jobs at 392 companies in Hampstead, MD
2mo
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API Developer/Programmer
Aberdeen Proving Ground, Maryland, United States
$90k-$150k/yr OnsiteFull Time
2+ YOEBachelor's degree in a technical field and 2+ years experience. Experience with web/API development, MongoDB, PostgreSQL, Microsoft Azure, Keycloak, Java, cloud/containerization, information systems security, and Agile.
MongoDB, PostgreSQL, Microsoft Azure, Keycloak, Java
1w
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API Developer (Senior)
Baltimore, Maryland, United States
OnsiteFull Time
3+ YOEBachelor's in CS or related field (or 5 years' equivalent),3+ years computer experience,1+ year web/app development experience; knowledge of HTML,CGI,PERL,Javascript,Java,cloud and Salesforce.
HTML, CGI, PERL, Javascript, Java, Salesforce
1mo
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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
3w
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KONG/API GATEWAY SURGE ENGINEER
United States or Washington
HybridFull Time
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
2w
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API Lead
Baltimore, Maryland, United States
RemoteFull Time
Design, develop, and maintain REST APIs and enterprise integrations using FHIR/HL7, cloud (AWS preferred), and data mappings between JSON, XML, X12 and flat files.
REST, FHIR, HL7, AWS, JSON, XML, X12
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
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
1mo
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Application Engineer 4 (API)
Linthicum Heights, Maryland, United States
HybridFull Time
4+ YOETS/SCI with Polygraph required. Python, Docker, Django/Flask, MariaDB or MongoDB, REST and microservices experience. Minimum 4-12 years experience depending on degree.
Python, Docker, Django, Flask, MariaDB, MongoDB, ReST, AWS, JSON, XML, Jira, Confluence, Git
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
3d
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Developer Associate
Bethesda, Maryland, United States
$120k-$135k/yr OnsiteFull Time
2+ YOERequires 2–4 years in a developer-facing role, technical bachelor's degree or equivalent experience, coding proficiency, REST API knowledge, API testing, Git, issue tracking, and strong communication skills.
Claude Code, GitHub Copilot, Cursor, MCP, Python, JavaScript, Node.js, Java, REST APIs, webhooks, OAuth 2.0, API keys, Postman, Insomnia, Git, Jira, Asana, Swagger/OpenAPI, Redoc, Readme.io, CI/CD
1w
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Senior Lead Software Engineer, Back End (GraphDB & API Platform) (Enterprise Platforms Technology)
Richmond or Plano or McLean
$209k-$239k/yr OnsiteFull Time
6+ YOEBachelor's degree,6+ years software engineering experience,1+ year cloud experience; experience with GraphDB, APIs, cloud-native and distributed systems preferred.
Java, Scala, Python, Go, Node.js, AWS, Microsoft Azure, Google Cloud, GraphDB
2mo
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Salesforce Developer
Adelphi, Maryland, United States
OnsiteContract
2+ YOE2–4 years Salesforce development; Bachelor's in CS or INFO; Apex, Flows, LWC, APIs, Data Loader; Agile; strong problem-solving and communication.
Apex, Lightning Web Components, Salesforce Flows, APIs, Data Loader, Copado, Git
3w
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Developer, Applications
Westminster or Crawfordsville
$70k-$85k/yr OnsiteFull Time
2+ YOECollege degree or equivalent with 2+ years IT development/support experience; experience with ERP/WMS/TMS; strong Oracle PL/SQL, Linux, Python, JavaScript, and Git skills; barcode and API knowledge.
Oracle, PL/SQL, Linux, Python, HTML, JavaScript, Perl, C, TCP/IP, API, Git, VS Code
2w
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OneStream Developer
Washington, District of Columbia, United States
$85k-$130k/yr OnsiteFull Time
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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FABIS Lead Engineer
Bethesda, Maryland, United States
$190k-$210k/yr HybridFull Time
Requires C# software development, WPF, .NET website development, REST APIs, relational databases, DoD IAT Level II certification, U.S. citizenship, and current Top Secret with SCI Poly clearance.
C#, .NET, WPF, REST API, Microsoft SQL Server, RabbitMQ, Git
1w
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AI Automation Engineer / Developer
Frederick, Maryland, United States
OnsiteFull Time
Strong software development skills (e.g., Python, JavaScript/TypeScript), hands-on experience with AI tools (Claude) and automation, API integration experience, discretion with confidential client data, and ability to deliver production systems.
Claude, Python, JavaScript, TypeScript, APIs
3w
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Software Engineer
Arlington or McLean
$69k-$158k/yr OnsiteFull Time
2+ YOE2+ years software development experience, bachelor's degree, ability to obtain Secret clearance, experience with C#, Web API, CI/CD and containerization preferred.
C#, Web API, Java, Python, JavaScript, Angular, React, NodeJS, .NET Framework, .NET 5, .NET 8, .NET 10, Docker, Jenkins, GitHub Actions, Azure DevOps
1w
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Software Engineer
Hunt Valley, Maryland, United States
$86k-$115k/yr HybridFull Time
5+ YOEBachelor's degree in computer science or related field, 5+ years software engineering experience, API and full-stack development experience, familiarity with Agile, testing, and cloud paradigms.
.NET (C#), SQL, HTML, CSS, JavaScript, NodeJS, Angular, React, Vue, Azure DevOps, Git, MS SQL Server, Typescript, REST API, HTTP, Java
1mo
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Software Engineer
Annapolis Junction, Maryland, United States
$96-$108/hr OnsiteFull Time
14+ YOEExperience developing complex software systems using Java and Spring Boot, Linux, web services/APIs, SQL, Git, and container technologies; TS/SCI with polygraph required.
Java, Spring Boot, Linux, API, SQL, Git, Docker, JavaScript, ReactJS, Apache Kafka, Apache NiFi, Docker Compose, Maven, Jira, Confluence, Atlassian
1mo
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Salesforce Application Developer (6638)
Washington, District of Columbia, United States
$125k-$145k/yr HybridFull Time
3+ YOEBachelor's in CS or related, active Secret clearance, Salesforce Platform Developer I, 3–5 years Salesforce development experience with Apex, LWC, Flows, APIs; local to the DMV and able to support onsite in Washington, DC.
Apex, Lightning Web Components (LWC), Salesforce Flows, Platform Events, APIs, CRM Analytics, Salesforce
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