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  • Backend/API Engineer

     ...Everforth ECS is seeking a Backend/API Engineer to work in the National Capital Region covering the Pentagon, Falls Church, and...  ...to production model artifacts within Unclassified networks. • Develops scalable serving frameworks using Kubernetes services, API gateways... 
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    ECS Limited

    Falls Church, VA
    4 days ago

  • Backend/API Engineer

    Backend/API Engineer Everforth ECS is seeking a Backend/API Engineer to work in the National Capital Region covering the Pentagon, Falls...  ...to production model artifacts within Unclassified networks. Develop scalable serving frameworks using Kubernetes, API gateways,... 
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    Contract work
    Local area

    ECS

    Fairfax, VA
    3 days ago

  • Low-Latency Backend Engineer: Target Tracking & APIs

     ...candidate, active, timeout, split/merge) Build and maintain REST APIs with strict latency SLOs (sub-20ms update paths) Implement persistent storage using MySQL and long-term archival in ClickHouse Develop composite fingerprint matching algorithms with policy-weighted... 
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    Digital Global Systems Inc

    Mc Lean, VA
    2 days ago

  • Full-stack Engineer - Model Zoo UI/API

     ...Full-stack Engineer - Model Zoo UI/API Everforth ECS is seeking a Full-stack Engineer - Model Zoo UI/API to work in the National...  ...at mission speed. Responsibilities include: Developing and advancing user interface and application programming interface... 
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    ECS

    Fairfax, VA
    1 day ago

  • Backend/API Engineer — AI-Driven War Data Platform

    ECS is seeking a Backend/API Engineer to join their team in the National Capital Region, specifically for the War Data Platform initiative...  ...and must possess a current Secret security clearance. You will develop scalable backend components and maintain the integration of AI... 
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    ECS

    Fairfax, VA
    3 days ago

  • Java Full Stack Developer — APIs, UI & AI Initiatives

    Ampcus, Inc is seeking a skilled Java Full Stack Developer in McLean, VA, to enhance and maintain internal applications. The role primarily involves backend development with Java, Spring, REST, and AWS, alongside UI development using JavaScript, TypeScript, and Angular.... 
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    Ampcus, Inc

    Mc Lean, VA
    5 days ago

  • Senior .NET Full-Stack Developer — Angular & API Expert

    We are seeking a skilled .NET Full Stack Developer with strong experience in Angular (v10+) and modern web technologies. The ideal candidate will have 5-8 years of...  ...building scalable web applications, developing REST APIs, and working across both front‑end and back‑end... 
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    Veriipro

    Washington DC
    5 days ago

  • Backend / API Engineer

    $68.08k - $141.83k

     ...organization, apply now. We are currently seeking a Backend / API Engineer to join our team in Bethesda (REMOTE), Maryland (US-MD...  ...workflows. The position requires deep technical expertise in developing RESTful APIs, microservices, and data pipelines that interface... 
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    NTT America

    Bethesda, MD
    2 days ago

  • Backend API Developer, Junior

    $85k - $110k

     ...Backend API Developer, Junior Silver Spring, MD / Remote Public Trust Eligible Required Blu Omega is seeking a Backend API Developer...  ...of Python and experience with Fast API ~ Experience with web services (RESTful) ~ Experience with source control management... 
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    Blu Omega

    Silver Spring, MD
    4 days ago

  • Mobile/Web Developer (.Net)

    $96.03k - $137.18k

     ...External Description Mobile/Web Developer (.Net) The Air Line Pilots Association, International (ALPA) , the largest airline pilot...  ...cross-browser compatibility/development, and RESTful Services and APIs are all a definite plus. Experience using automation and... 
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    Air Line Pilots Association, Int'l.

    McLean, VA
    3 days ago

  • Front End Web Developer at Mondo McLean, VA

    $90k - $110k

    Front End Web Developer job at Mondo. McLean, VA. Apply now: Front End Web Developer, location is Hybrid (McLean, VA). The start date is...  ...HTML, CSS, and JavaScript expertise Experience with RESTful APIs Familiarity with web animation frameworks (Motion, Anime.js,... 
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    Itlearn360

    Mc Lean, VA
    4 days ago

  • Full Stack Developer: Craft Scalable Web Apps & APIs

    TLA-LLC is looking for a skilled Full Stack Developer to join our team in McLean, Virginia. You will design, develop, and maintain robust web applications, ensuring optimal performance across platforms. The ideal candidate is proficient in front-end technologies like HTML... 
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    TLA-LLC

    Mc Lean, VA
    1 day ago

  • Remote Senior Maps API Engineer - Scalable Backend

    Mapbox is looking for a Software Development Engineer III to join its Maps API team in Washington, DC. You will lead the development of new mapping tools while ensuring high reliability and performance of services as they scale. Responsibilities include mentoring peers... 
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    Mapbox

    Washington DC
    2 days ago

  • Platform Backend Engineer: Scale APIs & TTS at Global Scale

    $140k - $200k

    Clutch Canada, based in Washington, is seeking a Backend Developer with proven experience in TS/Node to design and maintain robust APIs. This remote role requires collaboration with cross-functional teams and a focus on user experience. The ideal candidate will have experience... 
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    Clutch Canada

    Washington DC
    1 day ago

  • Senior Full-Stack Engineer, FinTech API & Platform

    $185k - $225k

     ...financial technology company in Austin is looking for a full-stack developer. This role requires 5+ years of software engineering experience...  ..., Node.js, and React desired. You'll work on building scalable APIs and user experiences while investigating issues proactively. A... 
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    Method Financial

    Washington DC
    6 days ago

  • Full-Stack Developer - Python, AWS & API Solutions

    We are seeking a skilled Full-Stack Developer to join our team in supporting a government client. In this role, you will play a key part in integrating data source APIs, developing Python scripts, creating and managing databases, generating reports, and conducting testing... 

    Stackruit Ltd.

    Washington DC
    5 days ago

  • Web Application / API Services Developer - Mid Level (FI2)

     ...Web Application / API Services Developer – Mid Level (FI2) Looking for an opportunity to revitalize an application that is used by everyone in our customer space? That's right, we're in the enviable position of starting from the beginning -- meaning we have the privilege... 

    Trinity Enterprise Services, LLC

    Chantilly, Loudoun County, VA
    29 days ago

  • Full Stack Web Developer: APIs, Security & CI/CD

    A government solutions provider is seeking an experienced Full Stack Web Developer in Fairfax, Virginia. The role involves software application development for a wide-scale data inventory project. Candidates must have at least 11 years of relevant experience, a Bachelor... 
    Full time

    CGS Federal (Contact Government Services)

    Fairfax, VA
    1 day ago

  • Senior Front End Developer

     ...ID: 40541 Summary Senior Front End Developer Vienna, VA Are you ready to enhance...  ...develop, and maintain back-end services and APIs Collaborate with front-end developers...  ...field ~5+ years of experience with web design and web front-end development ~... 
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    Work from home
    Home office

    Chenega Corporation

    Vienna, VA
    13 days ago

  • Front-End Engineer

     ...engineer to partner and build a Marketplace web application where users will learn about...  ...within and across Agile teams to design, develop, test, implement, and support technical solutions...  ...engineering and consuming RESTful APIs Knowledge of a version control system... 
    Long term contract

    Maintec Technologies

    McLean, VA
    2 days ago

  • Frontend Engineer

     ...be to implement a complete responsive UI web application. The Front-end engineer will...  ...include in ideating, experimenting, and developing modules, components, and coupling them into...  ...web applications that rely heavily on REST APIs using modern web technologies. Work... 
    Contract work

    campus4tech

    Vienna, VA
    5 days ago

  • Front-End Engineer

     ...You'll Do Build and maintain responsive, production-grade web applications using React and modern JavaScript/TypeScript Collaborate...  ...user experiences to life Integrate with backend systems and APIs to create seamless and performant interfaces Lead and... 

    Meibel

    McLean, VA
    1 day ago

  • Pioneering Evolution, LLC Full-Stack PHP Developer (Laravel) Arlington, VA or Remote 1d API Lar[...]

     ...alternative application process. Full-Stack PHP Developer Full Time Arlington, VA, US 2 days ago...  ...on building and maintaining complex web applications using the Laravel framework...  ...Experience building and consuming RESTful APIs. Proficiency with MySQL, including... 
    Remote job
    Full time
    Temporary work

    Laravel

    Arlington, VA
    5 days ago

  • Senior Front-End Software Engineer - Clearance Required

     ...Team. As part of the Agile software development team, this role develops solutions mainly using frontend technologies, such as Vue, JavaScript...  ...microservices ~ Strong understanding and knowledge in API best practices ~ Strong data modeling experience with relational... 
    Temporary work
    Remote work

    Cydecor

    Reston, VA
    1 day ago

  • Senior Frontend Engineer - AI Prototyping

     ...experiences. ~ Proficiency in Python and FastAPI for developing rapid, lightweight back-end prototypes and APIs. ~ Working knowledge of how AI and LLMs work ~...  ...to design intuitive user flows and layouts for web applications; experience with tools like Figma is a... 
    Work experience placement
    Flexible hours
    Shift work

    Seekr

    Reston, VA
    4 days ago

  • Front End GUI Developer / Software Engineer

     ...Front End GUI Developer / Software Engineer LOCATION Tysons, VA 22182 CLEARANCE...  ...concepts into functional and visually engaging web or application interfaces. If you have a...  ...principles Understanding of RESTful APIs Ability to integrate with back-end... 
    Temporary work
    For contractors
    Immediate start
    Flexible hours

    Cymertek

    Vienna, VA
    2 days ago

  • C# Fullstack Engineer - Senior - Consulting - Location OPEN

    $102.5k - $187.9k

     ...solutions that power their businesses across web, mobile, cloud platforms, physical...  ...Software Engineer , you will independently develop, test, and maintain high‑quality software...  ...Build and maintain backend services and APIs using modern backend programming languages... 
    Summer holiday
    Local area
    Flexible hours

    EY

    McLean, VA
    7 days ago

  • Senior Frontend Developer

    $108k - $195k

     ...OverviewPTR Global is hiring a Senior Frontend Developer. This is a contract hybrid role, based in...  ...with other IT groups, Dev Ops, and REST API middleware teams.Responsibilities Include:...  ...experience in building large-scale web-based applications using JavaScript/TypeScript... 
    Contract work
    Flexible hours

    TryApplyNow

    Mc Lean, VA
    4 days ago

  • Front End Developer

    Duties May Include: Design, develop, and maintain back-end services and APIs Collaborate with front-end developers and stakeholders to deliver end-to-end solutions...  ..., or STEM-related field 2+ years of experience with web design and front-end development Proven experience... 
    Contract work
    Temporary work

    Triglocon

    Mc Lean, VA
    2 days ago

  • Web Developer

    $80k - $100k

     ...support for the federal government. We are seeking a Mid-Level Web Developer to join our team supporting the General Services...  ...Strong fundamentals in HTML, CSS, JavaScript, JSON, and REST APIs. Proficiency with Git/version control workflows and development... 
    Contract work
    Work experience placement
    Work at office
    Local area
    Immediate start

    Hive Group, LLC

    Mc Lean, VA
    5 days ago