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  • Sr Backend Engineer, Discovery API

     ...helps people map, monitor, and respond to what's happening across the planet, and our catalog API is how customers find and access it. We're looking for a senior backend developer to own that API end to end on a small, high-autonomy team, with real influence over its... 
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    Full time

    Maxar Technologies

    Westminster, CO
    4 days ago

  • Front End Software Developer

    $82.1k - $172.4k

     ...seeking an experienced Front End Software Developer to join a multidisciplined team to work...  ...responsible for developing and maintaining web applications, ensuring a seamless user...  ...systems (e.g., Git). Familiarity with RESTful APIs and websockets. Excellent problem-solving... 
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    CACI International

    Denver, CO
    2 days ago

  • Sr Front-end Software Developer

    $108.4k - $227.5k

     ...CACI is seeking a Senior Front End Software Developer for the GEOINT Tradecraft Suite (GTS)...  ...will design and develop modern, intuitive web applications that enable analysts to discover...  ...front-end applications with RESTful APIs, microservices, and enterprise data services... 
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    CACI International

    Denver, CO
    1 day ago

  • Front-end Software Developer

    $90.3k - $189.6k

     ...looking for a Senior Front-End Software Developer on the FADE program to build mission-critical...  ...of new requirements using contemporary web technologiesCreate intuitive applications...  ...front-end applications with RESTful APIs, WebSocket services, and distributed backend... 
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    CACI International

    Denver, CO
    4 days ago

  • .Net Full Stack Lead Developer

     ...lead with strong hands on experience in C#, Angular (Mandate), Web API(Mandate) JQuery (Mandate)Windows Communication Foundation (WCF...  .... .Net / C# (backend service/API programing and not front end developers) Candidate should have been currently working as lead in the... 
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    EROS Technologies

    Denver, CO
    1 day ago

  • Frontend Developer

    $135k - $230k

     ...level proficiency in TypeScript and React (including hooks, context API, and state management libraries like Redux or Recoil). ~...  ...Structures, Algorithms, and Design Patterns ~ Solid understanding of web performance optimization techniques. ~ Experience with modern... 
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    Temporary work

    IQ Clarity LLC

    Denver, CO
    1 day ago

  • Principal Software Engineer - Frontend, Developer Experience

     ...data volumes and associated costs by 84% on average while saving developers thousands of hours. Recognized as a leader by major analyst...  ...the organization to evolve the architecture powering our UIs and APIs (TypeScript, React, GraphQL, NodeJS).Work closely with talented... 
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    Palo Alto Networks

    Denver, CO
    1 day ago

  • Full Stack Java Developer

     ...variable cost.Job DescriptionFull Stack Java Developer who has 6+ years' experience with both...  ...must have the ability to construct Web pages using AngularJS. Candidate must also...  ...development including RESTful WebServices and APIs, DAO/DTO, mySQL/Postgres This project... 
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    Artech

    Englewood, CO
    1 day ago

  • Full Stack Software Engineer

     ...Our client is seeking a Full Stack Software Engineer for the Developer Platform team to build and enhance a customer-facing Portal. You...  ...TypeScript, Python, and Django. Design, build, and support RESTful APIs and backend services. Create intuitive, responsive user... 
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    Eliassen Group

    Denver, CO
    1 day ago

  • IOS Java Full Stack Developer

     ...Job Title: IOS Java Full Stack Developer Location: Denver, CO- locals or nearby states...  ...Must Skills: Java, Spring Boot, REST APIs, Angular/React, Swift/Objective-C Description...  ...role involves building backend services, web applications, and contributing to iOS... 
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    Quantum Technologies USA

    Denver, CO
    4 days ago

  • Software Engineer III - Full-stack Developer with Anthropic Experience

    $122k - $240.5k

     ...operationalize RESTful and asynchronous APIs on cloud-native infrastructure (AWS, Azure...  ...deployment.4+ years of experience designing, developing and delivering AI/ML solutionsAt least 1...  ...major cloud platform, including Amazon Web Services, Microsoft Azure, or Google... 
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    Deloitte

    Denver, CO
    2 days ago

  • Senior Fullstack Software Engineer - Ecommerce

     ...strategies to resolve subsystem bottlenecks and meet team uptime OKRs.Develop decoupled integration points across AEM and Commerce services to...  ...GraphQL schema design, backend resolver optimization, and REST API development for low-latency data retrieval.Competence across... 
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    EchoStar

    Englewood, CO
    1 day ago

  • Full Stack Software Engineer

    $82.1k - $172.4k

     ...to join our dynamic team. As a key contributor, you will design, develop, and maintain innovative software solutions that meet modern...  ...system performance. A strong understanding of cloud computing, APIs, and software architecture is highly desirable. If you are passionate... 
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    CACI International

    Aurora, CO
    3 days ago

  • Full Stack Software Developer, Mid-level

    $82.1k - $172.4k

    Job Title: Full Stack Software Developer, Mid-levelJob Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: TS/SCI...  ...experienceKnowledge of WebSocket'sExperience with RESTful API design and implementationSecurity+ certification (or willingness... 
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    CACI International

    Denver, CO
    3 days ago

  • Full Stack Software Engineer

    $80k - $130k

     ...full-stack software applications and platforms — from frontend interfaces to backend services, APIs, and data layers — that improve business and operational performance.· Develop and maintain backend services, APIs, and data integrations using modern frameworks and... 
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    Loenbro

    Westminster, CO
    11 hours ago

  • Full Stack Engineer

     ...solutions. Modernization Design: Review Automation Anywhere bot workflows and architect resilient replacement systems utilizing APIs, microservices, and modern UIs. Full Stack Development: Lead hands-on development alongside the engineering team using Node.js,... 
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    Trilyon, Inc.

    Denver, CO
    1 day ago

  • Back-end Engineer

    $120k - $180k

     ...control and aerospace-operations teams. What you’ll be doing • Developing production-grade backend applications and services, primarily in Python • Designing, building and maintaining scalable APIs • Building reliable, performant software used in live customer... 
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    Flexible hours
    2 days per week

    EVONA

    Denver, CO
    2 days ago

  • Forward Deployed Engineer, USG Analytics (Backend & AI)

    $140k - $144.2k

     ...and innovation for government clients. Your work will involve developing scalable, secure applications that integrate seamlessly across...  ...orchestration frameworks, tool-calling architectures, and secure API integrations. Your responsibilities will include developing backend... 
    Apprenticeship
    Easy work
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    McKinsey & Company

    Denver, CO
    3 days ago

  • Sr Backend Software Developer

    $108.4k - $227.5k

     .../2026The Opportunity:CACI is seeking a Senior Backend Software Developer for the GEOINT Tradecraft Suite (GTS), a mission-critical platform...  ...related server-side technologies.Develop and integrate RESTful APIs, microservices, and data services supporting mission... 
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    CACI International

    Denver, CO
    3 days ago

  • Full Stack Developer, Senior

    $86.9k - $198k

    Full Stack Developer, SeniorThe Opportunity:As a Senior Full Stack Developer at Booz Allen, you will lead the modernization of mission‑critical...  ..., such as Docker and KubernetesExperience with complex API ecosystems, such as FastAPT, REST, gRPC, or GraphQLExperience building... 
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    Booz Allen Hamilton

    Aurora, CO
    3 days ago

  • Full Stack Web Developer

    $82.1k - $172.4k

    Job Title: Full Stack Web DeveloperJob Category: EngineeringTime Type: Full timeMinimum...  ...:CACI is seeking a Full Stack Web Developer to join our dynamic technology team. As a...  ...backend services• Build and maintain RESTful APIs that power our applications and integrate... 
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    CACI International

    Denver, CO
    11 hours ago

  • Backend Engineer (CLEARED) - 160036

    $120k - $180k

     ...design, build, and maintain backend services, APIs, and cloud‑integrated capabilities that...  ...REQUIRED Primary Responsibilities:• Develop backend services and APIs using Python in...  ...development, cloud engineer, aws engineer, amazon web services, lambda, ecs, eks, ec2, s3, rds,... 

    ZP Group

    Denver, CO
    11 hours ago

  • Principal Systems Engineer - Enterprise API Platform & GraphQL Engineering

    $119.77k - $140.9k

     ...new skills and discover what you excel at—all from Day One.Job DescriptionWhat You'll DoAct as the technical SME for our enterprise API ecosystem, leading engineering efforts across Apigee OPDK, Apigee Hybrid (Azure), and Apollo GraphQL platforms.Design and deliver secure... 
    Full time
    Work experience placement
    Local area
    3 days per week

    US Bank

    Denver, CO
    4 days ago

  • Mid-Senior Full Stack Developer

    $98.5k - $206.8k

     ...primary touchpoint between our platform and its customers — a sophisticated API layer and modern web UI delivering critical, real-time data to third-party partners. As a Mid-Senior Full Stack Developer, you will operate within a hardened, AWS-based, Kubernetes-native... 
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    CACI International

    Aurora, CO
    1 day ago

  • Lead Full Stack Engineer

    $130k - $155k

     ...through in-person teamwork at its Denver headquarters.What you will do:Design and develop scalable applications using .NET and modern front‑end frameworks.Build and optimize RESTful APIs and microservices for seamless integration across front-end applications.Work with... 
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    AIR Communities

    Denver, CO
    3 days ago

  • Lead Full Stack Developer (JP1110)

    $65 - $75 per hour

     ...native solutions using Node.js, TypeScript, React, AWS, and vendor APIs. This role requires strong analytical skills, communication,...  ...you acknowledge and agree that your application may be reviewed using AI tools.Job SummaryJob number: JP-006300820Profession: Developer
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    TEKsystems

    Englewood, CO
    1 day ago

  • Senior Full Stack Software Developer

    $120k - $145k

     ...the outdoors, is for everyone. Software developers at Campspot work on small agile teams to...  ...browsers. Accessibility: Understanding of web accessibility standards (WCAG) to ensure...  ...for SEO Experience working on a RESTful API consumed by external third parties Comfortable... 
    Casual work
    Remote work
    Flexible hours

    Campspot

    Denver, CO
    11 hours ago

  • Full Stack Software Developer

    $108.8k - $136k

     ...nation's healthcare systemasa Full Stack Software Developer. In thisrole,you'llcontribute to building and enhancing our web-based enterprise health platform. This isa great...  .... Experience working with microservices/an API-based application paradigm. This position description... 
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    Flexible hours

    Capital Rx

    Denver, CO
    11 hours ago

  • Senior UI/UX Engineer

    $107.9k - $195.05k

     ...for someone who is more than a front-end developer. You are passionate about how technology...  ...professional experience developing modern web-based user interfaces and user experiences...  ...developing or consuming RESTful APIs and integrating UI applications with backend... 
    Contract work
    Local area
    Immediate start

    Leidos

    Greenwood Village, CO
    3 days ago

  • Full Stack Software Engineer

    $110k - $140k

     ...software is a modern (React/TypeScript, C# .NET) web-based application which operators use to...  ...not required. RESPONSIBILITIES Develop key user-facing features to support both...  .... Develop internal and external facing API’s. Engineer algorithms and business... 
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    Worldwide

    InvestedintheMission

    Greenwood Village, CO
    4 hours agonew