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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... 
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    Work at office
    Remote work
    Flexible hours

    Babel Street

    Reston, VA
    1 day 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... 
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    System One

    Reston, VA
    2 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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    Immediate start

    Leidos

    Gaithersburg, MD
    7 hours ago

  • Mid-Level Fullstack Software Engineer

     ...promote market integrity. We are looking for experienced full-stack developers in our enterprise Transparency Services group. The developer...  ...with AWS services. You will focus on creating robust APIs, optimizing frontend performance, and collaborating with cross-... 
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    SGA

    Rockville, MD
    5 days ago

  • Principal Cloud Engineer

    $116.6k - $177.8k

     ...player-coach who provides technical direction, sets standards, and develops engineers while remaining deeply hands-on in architecting cloud...  ..., Lambda, S3, RDS/Aurora, DynamoDB, VPC, IAM, KMS, CloudFront, API Gateway, Route 53, CloudWatch, CloudTrail). Minimum 3 years... 
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    Meso Scale Discovery

    Rockville, MD
    3 days 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... 
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    For contractors
    Immediate start
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    Cymertek

    Vienna, VA
    2 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... 
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    INSPYR Solutions

    Falls Church, VA
    1 day ago

  • Application Developer

     ...opening for an early career GenAI Application Developer to build and enhance AI-powered applications for an AWS Contact Center As a Service...  ..., generative AI safety, and the creation of supporting APIs and data pipelines to improve customer experience through intelligent... 
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    Unisys

    Gaithersburg, MD
    1 day ago

  • Senior Oracle Apex Developer

    $75k - $110k

     ...Savantage Solutions is seeking a Oracle APEX Developer to join our core engineering team supporting Altimate, a proprietary Federal Financial...  ...and maintain APEX plugins, REST-enabled SQL services, and API integrations supporting federal financial workflows ~ Perform... 
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    Savantage

    Rockville, MD
    1 day ago

  • PHP WEB Developer

     ...patients and customers the highest priority. Job Description PHP Web Developer GeneDx, Inc Gaithersburg, MD GeneDx is a rapidly growing CAP...  .... Collaborate with other programming teams to develop APIs and utilize multiple systems to solve workflow complex problems... 
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    GeneDx

    Gaithersburg, MD
    4 days ago

  • Senior Cloud Infrastructure Engineer

     ...Analytics, and Alerts Deploying, managing, and troubleshooting network components such Load Balancers, Virtual Networks (VNets), API gateways, Firewalls, and Route Tables. Experience designing and building CI/CD pipelines Infrastructure-as-code experience... 
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    Soft Tech Consulting

    Rockville, MD
    3 days ago

  • UI/UX Engineer

    $110k - $145k

     ...Intelligence Community customer. In this role, you will design and develop intuitive, user-centered interfaces that transform complex...  ...across applications. Integrate front‑end applications with RESTful APIs and backend services. Optimize front‑end performance,... 
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    Full time
    Relocation package
    Shift work

    Ennoble First Inc.

    Gaithersburg, MD
    4 days ago

  • Sr. Java Developer

     ...Sr. Java Developer Apex Systems is looking for a Sr. Backend Developer to join the leading financial regulatory authority, who was voted...  ...within constraints of FINRA standards and conventions REST API design and development components supporting front end application... 
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    Work experience placement

    Software Technology Inc

    Rockville, MD
    1 day ago

  • Full Stack Developer

     ...Full Stack Developer Employment Type: Full Time, Mid-level CGS is seeking an experienced, resourceful, and inventive Full Stack Web...  .... ~ A passion for developing content rich web applications, APIs, services and scripts. ~ Experience working with Agile methodology... 
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    Contact Government Services LLC

    Rockville, MD
    6 days ago

  • Full Stack Developer

     ...seeking an experienced, resourceful, and inventive Full Stack Web Developer to join our team. This role will perform software application...  ...A passion for developing content rich web applications, APIs, services and scripts Experience working with Agile methodology... 
    Full time
    Flexible hours

    CGS Federal (Contact Government Services)

    Rockville, MD
    3 days ago

  • Lead Software Engineer (AWS, Python, Java, React, Generative AI APIs)

    $197.3k - $225.1k

     ...Lead Software Engineer (AWS, Python, Java, React, Generative AI APIs) Do you love building and pioneering in the technology...  ...Lead a portfolio of diverse technology projects and a team of developers with deep experience in distributed microservices, and full stack... 
    Full time
    Part time
    Internship
    H1b
    Local area

    Capital One

    McLean, VA
    22 days ago

  • Senior Java Software Engineer

     ...Tysons, VA (Hybrid – 3 days onsite) We’re looking for a Senior Java Developer who thrives on solving complex engineering challenges and...  ...Build high-performance backend services using Spring Boot, REST APIs, GraphQL, microservices, and event-driven architectures. Design... 
    Local area

    Unisys

    Rockville, MD
    4 days ago

  • Full Stack Software Engineer

     ...one of our premier regulatory clients in Rockville, MD. Design, develop, test, and deploy production-grade enterprise web applications for...  ...implement event-driven, serverless backend services and RESTful APIs using AWS Lambda, API Gateway, and Step Functions; design... 
    Contract work

    SGA

    Rockville, MD
    8 hours ago

  • Lead Software Engineer, Back End (Java/ Python/ Go Backend, REST/ GraphQL APIs, WAF, HTTP Protocol, AWS)

    $197.3k - $225.1k

     ...Software Engineer, Back End (Java/ Python/ Go Backend, REST/ GraphQL APIs, WAF, Protocol, AWS) Do you love building and pioneering at...  ...pipelines that defend Capital One's applications at scale Develop and maintain Python-based automation and tooling that manages... 
    Full time
    Part time
    Internship
    H1b
    Local area

    Capital One

    McLean, VA
    12 hours ago

  • Principal Software Engineer

     ...clarity with diagrams, documentation, and presentations to other developers, dev teams, SREs, and management. * Optimize build,...  ...heavy, complex frontend software. o Redux/Redux-Saga o Browser APIs o JS immutable data structures o In depth REST, gRPC, graphQL... 
    Work experience placement
    Remote work
    Flexible hours

    Donnelley Financial, LLC

    Rockville, MD
    2 days ago

  • Principal Software Developer

    $131.3k - $237.35k

     ...Description Leidos is seeking Principal Software Developers to join the Air Traffic Business Area within the Homeland Sector, supporting...  ...as Junit and Mockito Significant experience with RESTful API, JSON, XML, XSD Significant experience with Spring Framework... 
    Local area
    Immediate start
    Remote work

    Leidos

    Gaithersburg, MD
    5 days ago

  • Principal Software Engineer

    $200k - $225k

     ...leading complex, multi-quarter initiatives. Expert Technical Proficiency: Deep experience in our stack: Python (backend services, APIs), React/TypeScript (embedded UIs), and AWS cloud infrastructure. Architectural Mastery: Significant experience with system... 
    Work at office
    3 days per week

    Xometry

    Rockville, MD
    3 days ago

  • Backend Software Engineer

     ...architecting critical IT solutions, producing actionable intelligence, or developing cutting edge technology, we succeed because of the expertise,...  ...ll design and build scalable backend services, develop RESTful APIs, integrate complex data sources, and ensure system reliability... 

    Bridge Core

    Gaithersburg, MD
    3 days ago

  • Senior Backend Engineer

     ...genuine passion for the mission. Responsibilities: Design, develop, test, implement, and support technical solutions within an...  ...meet business objectives Build and maintain high-performance API platforms on AWS infrastructure, enabling interactive-speed access... 
    Contract work
    3 days per week

    SGA

    Rockville, MD
    5 days ago

  • Lead Developer

    $113k - $188k

    What You Will Do As a Lead Developer, you will provide technical leadership for teams supporting Grants.gov application operations, maintenance...  .... Experience developing or supporting web applications, APIs, system-to-system integrations, data exchanges, forms... 
    Temporary work
    For contractors
    Fixed term contract
    Flexible hours

    Guidehouse

    Rockville, MD
    2 days ago

  • Network Deployment Engineer

     ...troubleshoot security protocols across the network platform Develop and refine network and security configuration documentation for...  ...wireless lan) ~ Exposure to network automation concepts such as: API, scripting. Manufacturer Knowledge and Certifications: HPE... 

    Red River

    Germantown, MD
    1 day ago

  • DevOps Engineer

     ...handled manually as well as maintain and operate new processes as developed by the CAAT. Develop Windows automation with the use of...  ...ECS) ~ Experience with AWS Serverless architectures (lambda, API gateway, load balancing, autoscaling) ~ Experience supporting... 

    Texas State Library and Archives Commision

    Gaithersburg, MD
    4 days ago

  • Senior Full Stack Engineer

    $73 - $78 per hour

     ...Collaborate with diverse teams to understand application capabilities and testing scenarios, delivering effective solutions. Develop and optimize API platforms to serve big data with high performance, leveraging AWS architecture principles. Stay current with emerging... 
    Weekly pay
    Temporary work
    Flexible hours

    Experis

    Rockville, MD
    5 days ago

  • Senior Full-Stack Developer

     ...Job Title: Senior Full-Stack Developer Client : Federal Government Ref# GAOT2 Location : Remote with occasional travel to the...  ...cloud-native applications on AWS, including: Backend API development (REST, GraphQL) Database design and connectivity... 
    Remote work

    ExpediteInfoTech Inc

    Rockville, MD
    3 days ago