247 sr api developer jobs at 123 companies in Winchester, VA
1mo
Save
Mark Applied
Hide
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
Save
Mark Applied
Hide
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
Save
Mark Applied
Hide
Full Stack API Developer- TS/SCI with Polygraph
Chantilly, Virginia, United States
$187k-$253k/yr OnsiteFull Time
General Dynamics Information TechnologyNYSE: GD: Provides mission-critical IT services to government and defense organizations.
15+ YOE15+ years experience in full stack Java development, experience with ArangoDB, JIRA, Spring Boot, Mongo, AWS, JavaScript/TypeScript, Angular, REST; TS/SCI with polygraph required; BA/BS or equivalent.
ArangoDB, Atlassian JIRA, Java, Spring Boot, Mongo, AWS services, JavaScript, TypeScript, Angular, REST, Elasticsearch, OAuth 2.0
1w
Save
Mark Applied
Hide
Full Stack API Developer- TS/SCI with Polygraph
Chantilly, Virginia, United States
$187k-$253k/yr OnsiteFull Time
15+ YOETS/SCI+Polygraph clearance, 15+ years experience, strong Java full‑stack background, Spring Boot, Mongo, AWS, JavaScript/TypeScript, Angular, REST, ArangoDB, and JIRA experience.
ArangoDB, Atlassian JIRA, Java, Spring Boot, Mongo, AWS, JavaScript, TypeScript, Angular, REST, Elasticsearch, OAuth 2.0
2mo
Save
Mark Applied
Hide
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
1mo
Save
Mark Applied
Hide
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
1mo
Save
Mark Applied
Hide
Sr. Software Engineer
Herndon, Virginia, United States
OnsiteFull Time
Active TS/SCI with polygraph required; strong full‑stack skills with Angular, Spring Boot, Java; experience with APIs, DevOps/CI-CD, microservices, AWS, Python, Kubernetes; bachelor\u0002s degree in CS or related field.
Angular, Spring Boot, Java, GitHub, Jenkins, JIRA, AWS, AWS Lambda, Python, Kubernetes
2w
Save
Mark Applied
Hide
Sr. Systems Engineer III (6706)
Reston or Herndon or Tysons Corner
$166k-$202k/yr HybridFull Time
10+ YOEActive TS/SCI with CI Polygraph, 10+ years technical leadership, advanced degree preferred, hands-on AI/ML and data pipelines, cloud (AWS/Azure), containerization, security and enterprise integration experience.
AWS, Azure, MLOps, DoDAF, SAFe Agile, IV&V, API
1mo
Save
Mark Applied
Hide
SME Systems Engineer- API Gateway & Cloud Architecture
Sterling, Virginia, United States
$180k-$230k/yr OnsiteFull Time
16+ YOEBachelor's in STEM, 16+ years' experience, DoD 8140/Security+ CE, 5+ years API Gateway experience (Broadcom preferred), expertise with Windows and cloud-hosted COTS, Java/Python/C#, AWS/Azure/GCP, Docker, Kubernetes, Agile, cloud architecture, troubleshooting, and system testing. TS/SCI w/ Poly required; U.S. citizenship required.
API Gateway, Broadcom API Gateway, MuleSoft, Apigee, Istio, Linkerd, ServiceNow, Docker, Kubernetes, Java, Python, C#, Windows, AWS, Microsoft Azure, Google Cloud, Message queues, Streaming platforms, ETL, COTS, MBSE
3w
Save
Mark Applied
Hide
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
1w
Save
Mark Applied
Hide
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
1mo
Save
Mark Applied
Hide
Sr. Front-End Software Engineer (Geospatial & Middleware)
Sterling, Virginia, United States
OnsiteFull Time
8+ YOEActive Top Secret clearance, Bachelor’s in CS or related,8+ years front-end experience, strong JavaScript and modern frameworks, Protobuf and middleware experience, experience with Kafka/RabbitMQ/ActiveMQ/ZeroMQ, API development, geospatial UI experience.
JavaScript, React, Angular, Vue, Protobuf, Apache Kafka, RabbitMQ, ActiveMQ, ZeroMQ, gRPC, FlatBuffers, Avro, GitLab, AMQP, MQTT, Data Distribution Services, Cesium JS, Open Layers, Leaflet, Mapbox, WebGL
1mo
Save
Mark Applied
Hide
Sr. Test Engineer
Reston, Virginia, United States
$130k/yr RemoteFull Time
Bachelor's in CS or related; experience designing/implementing automation frameworks, CI/CD integration, BDD with Cucumber/Gherkin, Java scripting, Selenium/WebDriver, API testing, and QA in Agile environments.
Cucumber, Gherkin, Java, Selenium/WebDriver, Postman, Rally, GitLab, Jira, Confluence, AWS
1mo
Save
Mark Applied
Hide
GenAI Developer
Ashburn, Virginia, United States
HybridFull Time
7+ YOEU.S. citizen able to pass CBP background check; BA/BS preferred (experience considered); 7+ years full-stack development; React/Angular, SQL/NoSQL, Python/Java/JavaScript/TypeScript; GenAI concepts and APIs; AWS and Google cloud experience; DevSecOps knowledge.
React, Angular, SQL, NoSQL, Large Language Models (LLMs), transformers, Python, Java, JavaScript, TypeScript, AWS, Google Vertex AI, AWS Bedrock, GitLab, APIs, RESTful services, DevSecOps, CDNs
3d
Save
Mark Applied
Hide
Senior Developer TS/SCI
Reston, Virginia, United States
$130k-$230k/yr OnsiteFull Time
5+ YOEActive TS/SCI clearance, 5+ years of ServiceNow development, ITSM expertise, JavaScript, REST/SOAP, APIs, ServiceNow scripting, secure SDLC, certifications, and Agile/Scrum experience.
ServiceNow, ITSM, ITOM, ITAM, JavaScript, REST, SOAP, APIs, CMDB, SecOps, Discovery, HAM/SAM, Agile, Scrum, DevOps, HSA, FSA
3d
Save
Mark Applied
Hide
Principal Systems Engineer (API Gateway) - TS/SCI w CI Poly
Sterling, Virginia, United States
OnsiteFull Time
16+ YOEBachelor's degree and 16+ years designing enterprise systems, cloud architectures, and API solutions, including 5+ years with API gateways. Requires active TS/SCI with CI Polygraph and Security+ CE.
REST, GraphQL, AWS, Microsoft Azure, Java, Python, C#, Broadcom API Gateway, MuleSoft, Apigee, Istio, Linkerd, Google Cloud Platform (GCP), Oracle Cloud Infrastructure (OCI), IBM Cloud, ServiceNow, Windows
2mo
Save
Mark Applied
Hide
Sr. Product Engineer – Web Services
Redlands or United States or Vienna
$94k-$159k/yr RemoteFull Time
5+ YOE5+ years product-focused experience; Agile; web services and APIs; ArcGIS technologies; cloud-native fundamentals; strong communication; autonomous with cross-team collaboration; Bachelor's in CS or related field.
Python, JavaScript, TypeScript, SQL, ArcGIS REST APIs, ArcGIS API for Python, ArcGIS Hub, ArcGIS Maps SDKs, ArcGIS REST APIs
4w
Save
Mark Applied
Hide
Data Integration Engineer (Systems Engineer, Sr)
Chantilly, Virginia, United States
OnsiteFull Time
1+ YOEU.S. eligibility for DoD clearance, STEM bachelor's or equivalent, 1+ years backend/data services experience, API design (REST/GraphQL), Python/C++/Rust, PostgreSQL/Neo4j/doc DBs, CI/CD and data/security fundamentals.
REST, GraphQL, Python, C++, Rust, PostgreSQL, Neo4j, gRPC, SOAP
3mo
Save
Mark Applied
Hide
Software Developer
Herndon or Chantilly
$185k-$240k/yr OnsiteFull Time
6+ YOEActive TS/SCI with Full-Scope Polygraph, 6+ years software development, experience with Java/Python/C++/JavaScript, APIs, Git, Agile; cloud, DevOps, containerization preferred.
Java, Python, C++, JavaScript, AWS, Azure, Docker, Kubernetes, Git, REST APIs, CI/CD Tools, DevOps
4d
Save
Mark Applied
Hide
Software Developer
Chantilly, Virginia, United States
$190k-$230k/yr OnsiteFull Time
6+ YOEBS degree and 6+ years experience; development of microservice-based Java and Angular apps, secure RESTful APIs, Oracle/PostgreSQL, Scrum, AWS, EC2 scripting, Git/Jenkins/Rundeck.
Java, Angular, RESTful APIs, Oracle, PostgreSQL, Amazon Web Services, EC2, Git, Jenkins, Rundeck, Scrum, Spring Boot, Jira, Identity Access Management (IAM)