6d
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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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Back-End Software Developer
Arlington, Virginia, United States
$120k-$160k/yr OnsiteFull Time
U.S. citizen with active Secret clearance; experience with C#/.NET Core or .NET Framework, PL/SQL, API development, RESTful services, Git/Gitlab, and enterprise application delivery in Agile environments.
Microsoft .NET Core, Microsoft .NET Framework, C#, PL/SQL, Git, Gitlab, REST API, JWT, Docker, CI/CD
2w
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Back-End Software Developer
Arlington, Virginia, United States
OnsiteFull Time
U.S. citizen with active Secret clearance; proven API development using C#/.NET Core or .Net Framework; PL/SQL and relational DB experience; REST/JWT, Git/GitLab, Docker, CI/CD; enterprise application development in Agile.
C#, .NET Core, .Net Framework, PL/SQL, SQL, Git, GitLab, REST, JWT, Docker, CI/CD, VB.NET
4d
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Back End Developer
Fort Belvoir, Virginia, United States
$185k-$220k/yr OnsiteFull Time
8+ YOETop Secret/SCI eligibility with CI Polygraph, Bachelor’s in CS or related, 8+ years backend experience, proficiency with server-side languages, databases, APIs, cloud, containers, and classified-environment security.
Python, Java, C#, Ruby, Node.js, PostgreSQL, MySQL, MongoDB, Cassandra, REST, GraphQL, AWS, Azure, GCP, Docker, Kubernetes, Django, Spring, .NET, Kafka, RabbitMQ, Redis, Memcached, Terraform, Ansible, AWS Lambda, Azure Functions
2w
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Backend C2 Systems Full Stack Developer
Hanscom AFB or Hampton
$113k-$257k/yr OnsiteFull Time
8+ YOE8+ years software development experience including backend/services, microservices, relational and NoSQL datastores, message/streaming platforms, containerization, frontend (React), CI/CD, and eligibility for Secret clearance.
Java, .NET, C#, Python, Go, Kafka, React, AWS, Kubernetes, Prometheus, Grafana, OpenTelemetry
1w
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Software Engineer - .NET / SES
Reston, Virginia, United States
OnsiteFull Time
3+ YOE3–5 years backend software experience with C#/.NET, APIs/microservices, relational databases, CI/CD, cloud (AWS/Azure), and strong problem-solving skills.
C#, .NET, REST, gRPC, SQL Server, MySQL, GitHub, Azure DevOps, Jenkins, Docker, Kubernetes, Kafka, RabbitMQ, IBM MQ, AWS, Azure, React, JavaScript, TypeScript
1w
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Software Engineer - .NET / APIS
Reston, Virginia, United States
OnsiteFull Time
3+ YOE3+ years experience building C#/.NET backend services, APIs and microservices; SQL Server/MySQL; CI/CD and cloud (AWS/Azure); strong problem solving and teamwork; Bachelor\u0002s degree.
C#, .NET, REST, gRPC, SQL Server, MySQL, GitHub, Azure DevOps, Jenkins, Docker, Kubernetes, Kafka, RabbitMQ, IBM MQ, AWS, Azure, React, JavaScript, TypeScript
1w
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Senior Full-Stack Developer
Reston, Virginia, United States
OnsiteFull Time
7+ YOE7+ years building full-stack apps with modern JavaScript/TypeScript front ends, a mainstream backend (Node.js, Python, Java, .NET), relational databases, system integrations, secure development, and offline-resilient designs.
JavaScript, TypeScript, Node.js, Python, Java, .NET, ASYCUDA, SYDONIA, ETL, ELT, CI/CD
2mo
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Sr. Software Engineer
Philadelphia or New Jersey or Delaware or New York or Maryland or Florida or South Carolina or Texas or Virginia or Georgia
HybridFull Time
FreedomPay: A fast-growing payments and commerce technology delivering secure solutions globally.
7+ YOE7+ years in application development and testing; strong web, SPA, and backend skills; security-focused; Agile experience; strong English communication.
.NET, SQL Server, MVC, jQuery, React, Angular, Redux, TypeScript, JWT, Git, HTML, CSS, Websockets
3mo
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Full Stack Developer (C#)
Ashburn, Virginia, United States
$104k-$218k/yr HybridFull Time
7+ YOE7+ years backend development in C#/.NET; experience with relational and NoSQL databases; cloud and microservices; hybrid Ashburn, VA; US citizenship with ability to pass CBP background checks.
C#, NET, MongoDB, Kafka, PostgreSQL, Oracle, Docker, Visual Studio
1w
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Software Engineer II
Tysons, Virginia, United States
$88k-$123k/yr HybridFull Time
2+ YOEBachelor's degree or equivalent experience, 2+ years professional software development, strong OOP skills (C# preferred), backend/SQL experience, familiarity with modern JS frameworks and unit testing.
C#, .NET, SQL Server, Kafka, Ember.js, Angular, React, iOS, Android
1mo
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Software Developer (Mid) TS/SCI
Arlington, Virginia, United States
$130k-$145k/yr OnsiteFull Time
5+ YOEActive DoD TS/SCI clearance, 5+ years software development experience, bachelor’s degree (or equivalent experience), AWS certifications, experience with backend languages and frameworks, Agile/SDEL processes, and DevOps/tooling experience.
Java, JavaScript, Go, Python, TypeScript, .NET, Java Development Kit, Spring, Node.js, Gin, AngularJS, React, Next.js, NestJS, Google Web Toolkit, Hibernate, Struts, Git, GitLab, Terraform, Splunk, HashiCorp Vault, JIRA, Jenkins, Ansible, Amazon Web Services GovCloud, PostgreSQL, Amazon RDS, Keycloak, OIDC, SAML, Microsoft Windows Server, Linux
3mo
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Full Stack Mission Essential System Developer
McLean or Chantilly
$87k-$198k/yr OnsiteFull Time
5+ YOE5+ years in software development; Java, JavaScript/TypeScript, SQL; Agile methods; backend and frontend experience; TS/SCI with polygraph; HS diploma or GED.
Java, JavaScript, TypeScript, SQL, Python, C#, .NET, Spring, Angular, React, Node.js, Oracle, NiFi
3w
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Software Engineer III – IntelliScript (Remote)
Brookfield or New York City or Alaska or California or Connecticut or Illinois or Maryland or Massachusetts or New Jersey or Pennsylvania or Virginia or Washington or District of Columbia
$105k-$199k/yr RemoteFull Time
5+ YOE5+ years software engineering experience focused on data pipelines and backend systems; proficiency with C# (.NET), SQL, AWS, microservices, event-driven architectures, CI/CD and DevOps practices; strong problem-solving and mentoring skills.
C# (.NET), SQL, AWS, GitHub workflows, Terraform, CI/CD, DevOps, Agile/SAFe, EHR, FHIR, HL7
2mo
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Full Stack Developer (C#)
Ashburn, Virginia, United States
$104k-$218k/yr HybridFull Time
7+ YOEU.S. citizen able to pass CBP background checks, B.S. in CS or related (or equivalent experience), 7+ years backend development experience, expert C#, .NET/.NET Core, microservices, Kafka, PostgreSQL/Oracle/MongoDB, Git, unit testing, Visual Studio, Docker; hybrid in Ashburn, VA.
C#, .NET Framework, .NET Core, MongoDB, Kafka, PostgreSQL, Oracle, Git, Visual Studio, Docker, NUnit, xUnit, MSTest, AWS, Google Cloud, Dynatrace, AppDynamics, SCOM, Prometheus, Grafana, Terraform, CloudFormation, Kubernetes, Jenkins, Harness, GitLab
1mo
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Senior Software Engineer, e-Commerce Fulfillment
Romeoville or United States or Michigan or Nebraska or Illinois or Nevada or New Hampshire or Tennessee or Minnesota or Texas or Connecticut or Virginia or Maine or Indiana or District of Columbia or Wisconsin or Montana or New York or Maryland or Missouri or Kansas or Utah or Pennsylvania or Washington or Colorado or Arkansas or California or New Jersey or Iowa or Louisiana or Rhode Island or Massachusetts or South Carolina or Mississippi or Kentucky or Florida or Oregon or Ohio or North Carolina or Arizona or Idaho or Georgia
RemoteFull Time
5+ YOE5+ years building high-scale backend applications and microservices; expertise in event-driven architectures, message brokers (Kafka/RabbitMQ), distributed transactions, cloud platforms, software design, testing, and mentoring.
Kafka, RabbitMQ, AWS, Azure, GCP, Java, JVM, .NET, C#
1w
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Sr. Software Engineer, Platform
Alabama or Arizona or California or Colorado or Connecticut or Florida or Georgia or Idaho or Illinois or Indiana or Iowa or Kansas or Louisiana or Maryland or Massachusetts or Michigan or Minnesota or Missouri or Mississippi or North Carolina or Nebraska or New Jersey or Nevada or New York or Ohio or Oklahoma or Oregon or Pennsylvania or South Carolina or Tennessee or Texas or Utah or Virginia or Washington or Wisconsin or Wyoming
$120k-$150k/yr RemoteFull Time
6+ YOE6+ years building backend services in SaaS; experience with C# .NET or Node.js/TypeScript, Postgres/MySQL, Redis, AWS, CI/CD, observability, and production engineering; US work authorization required.
C# .NET, Node.js, TypeScript, Postgres, MySQL, Redis, AWS, CI/CD, Greenhouse
1w
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Full Stack Developer - Tech Dev (TS/SCI Required)
Washington or Reston
$165k-$185k/yr OnsiteFull Time
7+ YOE7+ years software development; bachelor’s degree or associate with 10+ years; full‑stack frontend and backend experience; strong SQL and DB skills; Git experience; active TS/SCI clearance and CI polygraph capability.
.NET, .NET Core, C#, Python, JavaScript, TypeScript, HTML, CSS, React, Angular, Vue.js, Node.js, SQL, Oracle, SQL Server, MySQL, Dynamo, Postgres, MongoDB, Gitlab, GitHub, Git, DevSecOps, YAML, Data Bricks, Jupyter Notebook, Atlassian, UI Path
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