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  • Senior Backend Engineer: Scalable .NET API for Benefits

    Employee Navigator, a leading SaaS provider, is seeking a Senior Backend Engineer to design and maintain APIs for their benefits enrollment platform. The role requires extensive experience in C# and API development, working collaboratively in a fast-paced environment.... 
    Suggested

    Employee Navigator

    Bethesda, MD
    3 days ago

  • .Net Full Stack Developer (Senior)

    $98.5k - $184.9k

     ...forward!   The work: As a .NET Full Stack Developer, you will play a critical role in the development and maintenance of web applications and services. You will be...  ...Familiarity or experience with architecture styles/APIs (REST, RPC) Develop and maintain web... 
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    Full time
    Live in
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    Local area

    Accenture Federal Services

    Washington DC
    16 hours ago

  • Software Engineering Manager - Backend/API Scale (AWS/.NET)

     ...technology company is seeking a Technical Manager for Software Engineering in Arlington, VA. The successful candidate will build large API-driven systems, lead software design and development standards, and leverage .NET on AWS. This role involves a collaborative culture... 
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    CoStar

    Arlington, VA
    16 hours ago

  • Front-End Software Engineer

     ...join our Technology team. Individual will be working on large-scale Web applications that will reach tens of millions of users nationwide...  ...Bootstrap 4/5 and any other notables Experience with RESTful APIs and efficient methods of requesting data from backend services... 
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    Full time
    Temporary work
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    Republican National Committee

    Washington DC
    16 hours ago

  • Senior Backend Engineer - APIs, Data, and Scale

     ...and interest in other database technologies such as columnar systems. ~ Experience with scaling, performance, and benchmarking of APIs and data processing systems. ~ Fluency with tools such as Copilot, Cursor, Claude Code, Kiro and a track record of using them to build... 
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    Work visa

    Jellyfish

    Washington DC
    2 days ago

  • Backend Developer: Java, Spring, AWS and APIs

    A global technology consulting firm is seeking a Backend Developer in Alexandria, Virginia. The role requires expertise in Java, J2EE, and Spring, with responsibilities including the development of web-based applications and collaboration within Agile frameworks. Candidates... 
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    Full time

    Booz Allen Hamilton

    Alexandria, VA
    3 days ago

  • Remote API Solutions Engineer

     ...a Mission Success Engineer to bridge the gap between customers and the engineering team. This remote position requires expertise in API integrations, strong communication skills, and experience in technical support. Responsibilities include designing custom API integrations... 
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    Remote job

    Motion Recruitment Partners LLC

    Alexandria, VA
    2 days ago

  • Full-Stack Developer (Java/Typescript and FHIR) (VSAC)

    $140k - $220k

     ...Consulting (BCC) is searching for a  Full-Stack Developer to support the User Services and...  ...ConceptMap resources, and integrating them into APIs and terminology services such as VSAC and...  ...experience ~5+ years of full-stack web applications development, using Python,... 
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    Full time

    Nih-ncbi

    Bethesda, MD
    16 hours ago

  • Software Engineer Full Stack - Agentic Computational Engineering (ACE) Platform

    $120k - $180k

     ...you will create high-performance full stack web applications that allow engineers to steer...  ...and intuitive ways for engineers. Develop real-time, collaborative editing and review...  ...platform, and domain team members to design APIs and data contracts that power the UI. Manage... 
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    Permanent employment
    Full time
    Contract work

    Voyager Technologies

    Washington DC
    16 hours ago

  • Backend API Engineer - Cloud, Microservices & Swagger

    A leading consulting firm is seeking a skilled back-end developer to create user-focused solutions through clean code, APIs, and effective systems. You'll engage with modern frameworks and collaborate with a team to achieve scalable performance. A Bachelor's degree and... 
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    Booz Allen Hamilton

    Mc Lean, VA
    1 day ago

  • Senior Full-Stack Engineer — API, Microservices & Cloud

    A leading auto insurer is seeking an experienced Senior Engineer to drive the transformation of their services. This role involves building high-performance, low-latency applications and providing a frictionless customer experience. The ideal candidate will have extensive...
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    GEICO

    Chevy Chase, MD
    3 days ago

  • Backend API Engineer: Cloud, Microservices & Scalable Apps

    A leading technology consulting firm seeks an experienced API Developer to drive backend development efforts. In this role, you will work with modern frameworks and cloud platforms to build user-focused solutions. The ideal candidate has over 2 years of experience in APIs... 
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    Booz Allen Hamilton

    Mc Lean, VA
    16 hours ago

  • Senior Full Stack Software Engineer

     ...core technical infrastructure to support our AI agents, including API gateways, state management systems for agentic workflows, and...  ...connect our AI's reasoning to our backend systems and data stores. Develop and optimize data architectures using relational and vector... 
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    Full time
    Local area
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    Resonate

    Washington DC
    16 hours ago

  • Full-Stack Engineer: Cloud, APIs & Scale

    A leading technology services provider is seeking a Full Stack Developer to design and build dynamic web applications and APIs on AWS. The ideal candidate will have strong experience in full-stack development, proficiency in languages such as Golang and Python, and familiarity... 
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    Govserviceshub

    Mc Lean, VA
    4 days ago

  • Software Engineer - Backend

    $130k - $170k

     ...useful in production. What You'll Do: Write high-quality, production-ready TypeScript code for our backend services and APIs Design, build, and maintain scalable services within our TypeScript monorepo Model data, design schemas, and optimize queries... 
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    Avante

    Washington DC
    16 hours ago

  • Full-Stack Software Engineer (Starlink Customer Success)

    $122.5k - $145k

     ...where we are not. Today SpaceX is actively developing the technologies to make this possible,...  ...development of mission-critical, high-performance web applications. RESPONSIBILITIES:...  ...framework Knowledge of requests, API structures (REST), and authentication techniques... 
    Permanent employment
    Full time
    Temporary work
    Work at office
    Worldwide
    Monday to Friday
    Weekend work

    Spacex

    Washington DC
    16 hours ago

  • Senior Software Engineer, Backend

     ...We are currently seeking skilled embedded software engineers to develop flight-critical firmware, with a focus on advanced drone pilot assistance...  ...building backend platforms, from the infrastructure up to the API layer (bonus if you’ve built real-time data platforms, scalable... 
    Full time
    Work at office
    Worldwide
    Flexible hours

    Brinc

    Washington DC
    16 hours ago

  • Senior Software Engineer - Backend

    $160k - $250k

     ...innovative organizations. The company empowers developers with a portfolio of best-in-class, pre-...  ...AI models, serving billions of customer API requests every month. Hive also offers...  ...has experience building core services and web-based APIs from the ground up, cares just... 
    Full time

    Hive

    Washington DC
    16 hours ago

  • Full Stack Software Engineer - Acquisition & Sustainment

     ...of DoD data management and analytics. Key Responsibilities Software Architecture & Development: Design and develop software architectures, APIs, frameworks, and libraries supporting intelligence-focused and mission-aligned capabilities. Build both frontend... 
    Full time
    Contract work

    Redhorse Corporation

    Arlington, VA
    16 hours ago

  • Full Stack Software Engineer

    $90k - $105k

     ...Inc. is seeking a Full Stack Software Developer to join our Team in Everett, WA!...  ...and connected systems. Develop backend APIs and services that integrate with sensors,...  ...device messaging pipelines. Contribute to web interfaces and dashboards used for device... 
    Hourly pay
    Full time
    Temporary work
    Worldwide

    Isoftstone

    Washington DC
    16 hours ago

  • Software Engineer - Backend

     ...join our backend team and play a critical role in building REST API microservices from scratch using ASP.NET Core (C#) and building...  ...certifications (e.g., AWS Certified Solutions Architect, AWS Certified Developer). What We Offer: Competitive salary & performance-based... 
    Full time
    Flexible hours

    Caseguard

    Arlington, VA
    16 hours ago

  • Senior Full Stack Software Engineer (Front End Leaning)

    $170k - $200k

     ...rapidly growing Seattle & NYC SaaS company developing an innovative platform in a trillion-...  ...application from front-end experiences to backend apis Bridge the gap between our AI/ML...  ...: ~ Building and maintaining React web applications in TypeScript. ~ Architecting... 
    Full time

    Adora Technologies

    Washington DC
    16 hours ago

  • Software Engineer, Backend/Fleet

    $107k - $164k

     ...Software Engineer in the FleetFoundation team, you will build scalable APIs and services that are core to Motive's success. We are looking...  ...and other critical Fleet data. What You'll Do: Develop highly observable, reliable, and scalable platform components... 
    Remote job
    Full time
    Temporary work
    Work experience placement
    Work at office
    2 days per week
    1 day per week

    Motive

    Washington DC
    16 hours ago

  • Full Stack Developer - Tech Dev (TS/SCI Required)

    $165k - $185k

     ...Kentro is hiring a qualified Full Stack Developer - Tech Dev to support our Defense Intelligence...  ...developer with experience delivering web solutions for the federal government, who...  ...in both front and back, microservices, and API development. Ability to work with the government... 
    Full time
    Local area
    Flexible hours

    Kentro

    Washington DC
    16 hours ago

  • Full Stack Developer

     ...seeking a versatile and skilled Full Stack Developer to join our dynamic team. The ideal...  ..., and maintenance of robust and scalable web applications, managing everything from the...  ...develop, and integrate  robust and effective APIs and RESTful services. · Participate... 
    Full time

    Tla-Llc

    Washington DC
    16 hours ago

  • Senior Full-Stack Developer

    $130k - $170k

     ...We are seeking a Senior Full-Stack Developer with a strong background in building and architecting...  ...design and deliver modern applications, APIs, and services that process large volumes...  ...and maintaining enterprise-grade web applications using modern languages and frameworks... 
    Full time
    Casual work

    Aristotle

    Washington DC
    16 hours ago

  • Senior Software Engineer - Service Platform (Backend)

    $155k - $190k

     ...improve health care in far-reaching ways.  In this role, you will develop a scalable platform and services that streamline interactions...  ...in using and designing distributed systems, data pipelines, APIs. Build simple and effective solutions for complex problems.... 
    Full time
    For contractors
    Work at office
    Flexible hours

    Truveta

    Washington DC
    16 hours ago

  • Full Stack Developer with TS/SCI Clearance

     ...environments, - Expertise in various COTS, GOTS and open-source tools which support development of data integration and visualization applications, - Experience with cloud message APIs and usage of push notifications, - Familiar with Python, Groovy, Shell Script,
    Full time

    Maania Consultancy Services

    Washington DC
    16 hours ago

  • Full Stack Developer

    $150k - $200k

     ...Us: SwarmInt is a defense AI startup developing computer vision and edge AI capabilities...  ...feeds Implement backend services and APIs for data processing and integration Deploy...  ...computing, or IoT Knowledge of Python web frameworks and API design Experience... 
    Full time

    Swarmint

    Arlington, VA
    16 hours ago

  • Junior Full Stack Developer

     ...satisfaction. Title: Junior Full Stack Developer Location:  Remote Terms: Full-time...  ...development support for User Interfaces, REST APIs, Data Access Layers. Ensure software...  ...schemas using JPA. Experience in Web Based Full Stack Development. Experience... 
    Full time
    For contractors
    Work experience placement
    Remote work
    Flexible hours

    Harmonia Holdings Group

    Washington DC
    16 hours ago