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1,371 api engineer jobs at 528 companies in Leesburg, VA

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
6d
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Senior API Platform Engineer
Reston, Virginia, United States
OnsiteFull Time
Akumen
Akumen: Provides technology, cybersecurity, and data services to federal agencies.
7+ YOEBachelor's or equivalent,7+ years in enterprise API management/platform engineering, experience with API gateways, REST/JSON/XML/OpenAPI, CI/CD, cloud and container deployments, Kubernetes/OpenShift, and federal security clearance eligibility.
Kong, IBM webMethods, Apigee, MuleSoft, Azure API Management, AWS API Gateway, IBM API Connect, WSO2, Tyk, REST, JSON, XML, OpenAPI, Kubernetes, OpenShift, Docker, Azure, AWS, CI/CD, Git, AppDynamics, ELK, Grafana, OpenTelemetry
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1mo
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Senior API Systems Engineer
Sterling, Virginia, United States
$150k-$254k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
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
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2w
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API Gateway Engineer
Quantico or Washington
$104k-$166k/yr RemoteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
8+ YOEActive Top Secret clearance, DoD 8570 certification (e.g., CISSP or Security+), extensive API Gateway experience, familiarity with Remedy/Service Now/JIRA, SOAP/REST/XML/JSON, SAFe agile, and gateway administration/operations.
API Gateway, Gateway Migration Utility, SiteMinder, Remedy, Service Now, JIRA, SOAP, RESTful, XML, JSON, Mulesoft, SAFe
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2mo
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Java API Developer
Herndon, Virginia, United States
HybridFull Time
NT Concepts
NT Concepts: Provides data and technology solutions for national security missions.
3+ YOEBachelor’s degree and 2–5 years of experience with Java, JavaScript, API-based software; TS/SCI with CI Poly clearance required.
Java, Spring Boot, JavaScript, REST APIs, GraphQL, SOAP, Postman, Swagger UI, Apache Kafka, NiFi, SQL, NoSQL, Git, AWS, Azure, GCP, Docker, Kubernetes
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2w
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API Gateway Engineer
United States or Quantico or Washington
$112k-$179k/yr RemoteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
7+ YOEActive TS clearance, DoD 8570 certification (e.g., CISSP or Security+), deep API Gateway experience, exposure to ITSM tools (Remedy, Service Now, JIRA), familiarity with SOAP/REST/XML/JSON, and SDLC/project management knowledge.
API Gateway, Gateway Migration Utility, SiteMinder, Remedy, Service Now, JIRA Help Desk, Mulesoft, SOAP, RESTful, XML, JSON, SAFe
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2w
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API Engineer (Remote)
Stafford or Alaska or California or Colorado or Connecticut or District of Columbia or Hawaii or Louisiana or Massachusetts or Minnesota or Missouri or Nebraska or Nevada or New Hampshire or New Jersey or New Mexico or New York or North Dakota or Oregon or Puerto Rico or Rhode Island or Vermont or Washington or Wyoming or United States
RemoteFull Time
Oxley Enterprises
Oxley Enterprises: Provider of enterprise IT solutions and organizational management consulting.
No specific skills, education, or experience listed in the job text; posting states remote US eligibility and includes benefits information.
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23h
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Kong / API Gateway Surge Engineer
Washington, District of Columbia, United States
$150k-$170k/yr RemoteFull Time
West 4th Strategy
West 4th Strategy: Provides technology and professional services to federal government agencies.
7+ YOE7+ years engineering experience with Kong or equivalent API gateway, CI/CD/GitOps integration, migration support, observability integration, and documentation for government acceptance.
Kong, GitOps, CI/CD, DevSecOps
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1w
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API Gateway Engineer (Kong)
Herndon, Virginia, United States
$170k-$210k/yr RemoteFull Time
BDR Solutions
BDR Solutions: Provider of IT, engineering, and consulting for federal agencies.
Deep Kong (Enterprise/Konnect) experience, API migration and CI/CD integration skills, federal delivery and documentation experience, active IRS Minimum Background Investigation and U.S. citizenship required.
Kong Enterprise, Kong Konnect, GitOps, CI/CD, DevSecOps
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1d
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KONG/API GATEWAY SURGE ENGINEER
United States or Washington
HybridFull Time
Constellation West
Constellation West: Provides mission-critical technology services for federal government 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
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4w
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Senior Backend API Engineer
Linthicum, Maryland, United States
OnsiteFull Time
Quevera
Quevera: Software engineering and cloud solutions for government and defense.
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
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2d
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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
Guidehouse
Guidehouse: Provides management and technology consulting services to diverse organizations.
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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3w
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Senior MuleSoft API Developer
United States or McLean or Columbus
RemoteFull Time
Credence
Credence: Provides technology and management solutions to federal government agencies.
5+ YOEBachelor's in CS or related, 5+ years MuleSoft Anypoint Platform experience, active MuleSoft Developer and DoD 8570 IAT 1 credentials, EMR not required; experience with DataWeave, REST, and SOAP, Agile environment experience.
MuleSoft Anypoint Platform, DataWeave, REST APIs, SOAP
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1w
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eGRC Senior API Developer
Herndon, Virginia, United States
RemoteFull Time
ShorePoint
ShorePoint: Provides cybersecurity and risk management services for federal agencies.
10+ YOEBachelor's degree, 10+ years relevant experience (≥5 years development/scripting, ≥2 years cybersecurity operations), SOAR development, scripting, GitHub, RMF knowledge, US citizenship and ability to obtain security clearance.
SOAR, RegScale, Axonius, GitHub, Microsoft Visio, Tines, Splunk Phantom, Robotic Process Automation (RPA)
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2mo
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Principal Engineer, API & MCP Platform
Reston or Somerville
$220k-$250k/yr HybridFull Time
VIA
VIA: Provides secure decentralized identity and data privacy software solutions.
10+ YOESenior-level principal engineer for API and MCP platform; hybrid role; Reston, VA or Somerville, MA; high ownership and hands-on leadership.
API design, MCP (Model Context Protocol), Semantic APIs, GCP, Vertex AI Context Caching, BigQuery, Snowflake, Apigee
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2w
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Staff Engineer - API Team
Washington or United States
$160k-$175k/yr RemoteFull Time
Democratic Data Exchange
Democratic Data Exchange: Facilitating secure, real-time voter data exchange for progressive campaigns.
Experienced software engineer with API and cloud experience (GCP preferred), strong systems and reliability skills, production shipping and mentorship experience, US work authorization, and willingness to serve on on-call rotation; bachelor's degree expected.
C#, .NET, React.js, PostgreSQL, Google Cloud Platform (GCP), CloudRun, Cloud Functions, Pub/Sub, BigQuery, ClickHouse, GitHub Actions, Docker, Terraform, Firebase
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1mo
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SME Systems Engineer- API Gateway & Cloud Architecture
Sterling, Virginia, United States
$180k-$230k/yr OnsiteFull Time
Synergy ECP
Synergy ECP: Provides cybersecurity and systems engineering for defense agencies.
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
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1w
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Principal Systems Engineer (API Gateway) - TS/SCI w CI Poly
Sterling, Virginia, United States
OnsiteFull Time
Modern Government Solutions
Modern Government Solutions: Provider of technical and programmatic services for government agencies.
16+ YOEActive DoD TS/SCI with CI Poly required, Security+ CE per DoD 8140, Bachelor's degree, 16+ years systems engineering experience, API gateway and cloud integration expertise, programming experience in Java/Python/C# and EMR of secure enterprise systems.
REST, GraphQL, AWS, Azure, Java, Python, C#, Broadcom API Gateway, MuleSoft, Apigee, Istio, Linkerd, ServiceNow, Google Cloud Platform (GCP), Oracle Cloud Infrastructure (OCI), IBM Cloud, MBSE, Windows, ETL
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3w
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Senior Application Developer (DAAS API GW)
Washington or United States
RemoteContract
Horizon Industries
Horizon Industries: Provides IT and management consulting services to government clients.
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
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1mo
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Senior Software Engineer - API & MCP Platform
Bethesda or Waltham
$140k-$200k/yr HybridFull Time
ZoomInfo
ZoomInfoNASDAQ: GTM: Provides B2B contact data and sales intelligence software.
5+ YOEBachelor's or equivalent experience, 5+ years software development, 3+ years building RESTful APIs/microservices, expertise in Java and NestJS, OAuth 2.0/OpenID/JWT, API design and security, MCP experience.
Java, NestJS, Spring Boot, Spring Security, Maven, Gradle, OAuth 2.0, OpenID Connect, JWT, OpenAPI, Swagger, Model Context Protocol (MCP), AWS, GCP, Azure, Docker, Kubernetes, Kafka, RabbitMQ
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1w
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SME Systems Engineer - API (TS/SCI w/ CI Poly required)
Sterling, Virginia, United States
OnsiteFull Time
A&M Technologies
A&M Technologies: Provides technical and management services for federal IT infrastructure.
10+ YOEActive TS/SCI with CI poly, Security+ CE or higher, 10+ years relevant experience, STEM degree, API gateway expertise (5+ years), Java/Python/C# proficiency, cloud and containerization experience.
API gateway, Broadcom API, AWS, Azure, Google Cloud Platform, Docker, Kubernetes, Java, Python, C#, MuleSoft, Apigee, Istio, Linkerd, ServiceNow
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