Average salary: $130,000 /yearly

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  • Principal Engineer, API & MCP Platform

    $220k - $250k

     ...Summary We are seeking a Principal Engineer to lead Babel Street's API and MCP platform strategy and delivery as we evolve toward an...  ...delivering API‑first platform capabilities that enable both developers and AI agents to interact with Babel Street's services. You will... 
    Suggested
    Work at office
    Remote work
    Flexible hours

    Babel Street

    Reston, VA
    1 day ago

  • API/Java/Python Developer, SME TS Clearance REQUIRED

    $88.2k - $190.9k

    API/Java/Python Developer, SME TS Clearance REQUIRED Position Description Position Description CGI Federal has an exciting opportunity for an API/Java/Python Developer within our Intel sector advancing the national security mission through cutting edge technology... 
    Suggested
    Local area
    Arlington, VA
    more than 2 months ago

  • Java API Developer

    We are seeking a Mid-level API Java Developer to join our team. Working at NT Concepts means you are part of an innovative, agile company dedicated to solving the most critical challenges in National Security. Mission Focus As a member of our solutions delivery team,... 
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    Local area
    Remote work
    Flexible hours

    NT Concepts

    Herndon, VA
    2 days ago

  • Sr Software Engineer - Java & APIs (Night Shift)

    $79 per hour

    Job Title: Java Developer - Night Shift Location: Reston, VA Type: Contract to Hire Compensation: $79/HR Work Model: Hybrid - onsite and...  ...We are looking for a Senior Software Engineer with strong Java, API, and production support experience to build, maintain, and... 
    Suggested
    Full time
    Contract work
    Local area
    Remote work
    Night shift

    System One

    Reston, VA
    2 days ago

  • Mid-Level Software Developer

     ...JRAD is seeking candidates for a Mid-Level Software Developer position responsible for designing, developing, testing, and maintaining software...  ...technical documentation including code comments, manuals, and API references. Familiar with Agile Software Development such as... 
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    Full time
    Contract work
    Remote work
    Flexible hours

    Joint Research and Development , Inc.

    Arlington, VA
    4 days ago

  • Mid-Level Software Engineer

    $87.1k - $157.45k

     ...an Intelligence Community customer. In this role, you’ll design, develop, and deliver modern software solutions that enable critical...  ...functional development teams to build and maintain microservices, APIs, and web-based applications that support GEOINT data access, visualization... 
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    Contract work
    Local area
    Immediate start

    Leidos

    Alexandria, VA
    9 hours ago

  • UI Developer

     ...UI Developer Location: Northern Virginia UI developer. The role entails building a browser-based portal which acts a repository for...  .... The pages will be dynamic and would interact with AWS services and other APIs. 3+ years’ experience doing similar tasks.... 
    Suggested

    United IT

    Alexandria, VA
    1 day ago

  • Senior Software Engineer - Backend/Platform Agentic AI

     ...for AI/ML development (agentic frameworks, scripting, integrations) Hands-on experience building LLM-powered production systems (API integration, prompt management, streaming, error handling, cost management) Experience with agentic frameworks (LangGraph, LangChain... 
    Suggested
    Worldwide

    Dynamic Yield

    Arlington, VA
    4 days ago

  • Software Engineer II - Backend/Platform Agentic AI

     ...Strong proficiency in Java for backend and service development Experience integrating AI/ML capabilities in production (LLM APIs, model serving, retrieval pipelines, or similar) Strong understanding of REST APIs, microservices architecture, and distributed systems... 
    Suggested
    Worldwide

    Dynamic Yield

    Arlington, VA
    4 days ago

  • Lead Cloud Application Engineer

     ...Job Title Architect and Developer Job Description Architect and develop across both front-end (React) and back-end (C#) codebases...  ...At least 10 years of work experience in building.NET based web APIs using C# and at least 10 years of work experience with modern... 
    Suggested
    Work experience placement

    RIT Solutions

    Oxon Hill, MD
    4 days ago

  • SQL Developer

     .... We are seeking a detail‑oriented and technically skilled SQL Developer to support the design, development, maintenance, and optimization...  ...environments. Upload and integrate records from flat files, APIs, and cross‑database schemas. Perform data validation, troubleshooting... 
    Suggested
    Full time
    Contract work
    Part time
    For contractors
    Work at office
    Local area
    Work from home
    Flexible hours

    Serco

    Arlington, VA
    1 day ago

  • Software Engineer (C#/.NET)

    $108k - $154k

     ...building software. We firmly believe that what separates a good developer from a great one is a deep understanding of the business that they...  ...on Friday. Responsibilities Build big, distributed, API-driven systems for tens of thousands of users. Design and implement... 
    Suggested
    Hourly pay
    Full time
    Work at office
    Work from home
    Monday to Thursday

    CoStar Group

    Arlington, VA
    9 hours ago

  • Senior .NET Developer

     ...Senior .NET Developer Location: Alexandria, VA Work Schedule: Onsite 5 days per week Employment Type: Contract-to-Hire Clearance...  ...using .NET Framework, .NET Core, Angular, SQL Server, and API development . The ideal candidate will have strong full-... 
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    Contract work

    JCD Staffing

    Alexandria, VA
    9 hours ago

  • Senior Cloud Platform Security Engineer

    $115k - $203k

     ...platform security environment, which consists of commercial and custom developed security controls that run within the IDE, the CI/CD system,...  ...controls using infrastructure as code, scripting, and API integrations to scale security across all web applications in a... 
    Suggested
    Hourly pay
    Full time
    Work at office
    Work from home
    Monday to Thursday

    CoStar Group

    Arlington, VA
    5 days ago

  • Staff Backend Engineer

     ...improvements. Design event-driven and distributed systems that are resilient, observable, and performance-tuned. Define stable APIs for internal and external consumers, partnering with frontend for seamless integration. Improve engineering excellence through... 
    Suggested
    Full time
    Work at office
    Flexible hours

    Twenty

    Arlington, VA
    21 days ago

  • Software Engineer, Platform - Alexandria, VA, USA

    $140k - $200k

     ...analytics, subscriptions, new products, text to speech, and external APIs. This is a key role and ideal for someone who thinks...  ...complete them within 1 week.  What Yo u’ ll Do Design, develop, and maintain robust APIs including public TTS API, internal APIs... 
    Work at office

    Speechify

    Alexandria, VA
    4 days ago

  • Front End Developer

    $120.21k - $180.31k

     ...Opportunity Two Six Technologies is actively seeking a Front End Developer to join our Software Engineering team. The team is composed of...  ...in building front-end interfaces that interface with REST APIs and web sockets. Active Top Secret Clearance with... 
    Contract work
    Work at office
    Local area

    Two Six Technologies

    Arlington, VA
    3 days ago

  • Entry Level Developer/Coder/Programmer/Data Scientist/Analyst/Engineer

     ...looking for entry-level software programmers, Java Full stack developers, Python/Java developers, data analysts/data scientists, machine...  ...programming Spring boot, Microservices, Docker, Jenkins and REST API's experience Excellent written and verbal communication... 
    Full time
    H1b
    Remote work

    SynergisticIT

    Arlington, VA
    3 days ago

  • Front End Engineer

     ...engineering best practices that support long-term product growth. Develop intuitive user experiences that enable operators to rapidly...  ...experiences that surface critical operational insights. Integrate with APIs, WebSocket-based services, and distributed backend systems to... 
    Full time
    For contractors
    Work at office

    RuneTech

    Arlington, VA
    5 days ago

  • API Developer

    $60 - $70 per hour

     ...Title: API Developer Location: Merrifield, VA Duration: 6+ Month Contract Compensation : $60/HR - $70/HR Work Requirements: US Citizen, GC Holders or Authorized to Work in the U.S. Skillset / Experience: We are looking for a Senior... 
    Contract work
    Local area
    Flexible hours

    INSPYR Solutions

    Falls Church, VA
    1 day ago

  • API Developer

     ...API Developer LOCATION Tysons, VA 22182 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are seeking a talented API Developer to join our team and play a key role in designing, building, and maintaining... 
    Temporary work
    For contractors
    Immediate start
    Flexible hours

    Cymertek

    Vienna, VA
    2 days ago

  • Application Developer III

     ...Application Developer III Location: Arlington, VA (On-Site)/ Hybrid Citizenship: US only Clearance: Active TS/SCI (DHS EOD Suitability...  ...and alerting automation for integrated systems Implement API integrations for data sharing and workflow automation... 
    For contractors

    Argo Cyber Systems

    Arlington, VA
    3 days ago

  • Front End Developer

     ...Overview Two Six Technologies is actively seeking a Front End Developer to join our Software Engineering team. The team works with modern...  ...in building front-end interfaces that interface with REST APIs and web sockets. Active Top Secret Clearance with eligibility for... 
    Work at office

    Two-Six-Technologies

    Arlington, VA
    1 day ago

  • Salesforce Developer

    $78.6k - $160.2k

     ...The work As a Salesforce Mid-Level Developer, you will design, build, and optimize solutions within the Salesforce Sales Cloud environment...  ...and CI/CD deployment pipelines Understanding of REST and SOAP APIs, including integration with external systems Experience... 
    Live in
    Work at office
    Local area

    Accenture

    Arlington, VA
    1 day ago

  • Senior Cloud Engineer

     ...environments Implement and maintain containerized workloads Develop and manage Infrastructure as Code using tools such as Terraform...  ...management Support system integrations across services, APIs, and platform components Contribute to technical documentation... 
    Temporary work
    Work at office
    Local area
    Flexible hours

    540

    Arlington, VA
    5 days ago

  • Application Developer

     ...experience with Microsoft compliance tools including Purview. The Developer should have some Microsoft Certifications including but not...  ...Applied Skills: Develop an ASP.NET Core web app that consumes an API Microsoft Applied Skills: Develop data-driven applications by using... 

    People Technology & Processes LLC

    Alexandria, VA
    1 day ago

  • Fullstack Engineer

     ...with a third-party loan servicing platform Build and maintain REST APIs that support loan origination, payment processing, and customer...  ...understanding its intent, and making clean, well-scoped changes Develop frontend components in React/TypeScript to support customer-... 
    Contract work
    Work at office
    Relocation package
    Flexible hours

    Koalafi

    Arlington, VA
    1 day ago

  • Senior Software Engineer - Backend

    $120k - $200k

     ...team and play a critical role in building the platform that will define CaseGuard's next chapter. You will design and build the REST API microservices and cloud infrastructure that power our application, real-time collaboration features, and large-scale processing... 
    Remote work

    CaseGuard

    Arlington, VA
    3 days ago

  • .NET Developer

    $103.8k - $218.1k

    Job Title: .NET Developer Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: Secret Employee...  ...relational database systems Familiarity with RESTful API design and integration Proficiency with Git or equivalent version... 
    Full time
    Work at office

    CACI International

    Arlington, VA
    2 days ago

  • Senior .Net Developer

    $125k - $135k

     ...is a leading Federal contractor that specializes in designing, developing, and delivering information technology and network solutions for...  ...application architecture Experience developing and managing APIs Strong experience with JavaScript UI frameworks including Angular... 
    For contractors
    Work experience placement

    Network Designs

    Alexandria, VA
    2 days ago