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  • Senior Backend Engineer - Enterprise SaaS & APIs

    $130k - $150k

     ...Software Engineer to build and enhance backend services powering APIs and integrations. The ideal candidate has 6+ years in backend...  ...development, specifically with Python/Django, and experience with modern developer tools. This role offers a competitive salary of $130K-$150K,... 
    Suggested
    Remote work

    Nutrislice

    Denver, CO
    5 days 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

    GrabJobs

    Denver, CO
    1 day ago

  • Senior QA Engineer (Backend/API Testing)

    $115k - $139k

     ...Summary: Our client is seeking a Senior QA Engineer (Backend/API Testing) to join their team! This position is located in...  ...defects and testing progress in Jira Collaborate closely with developers to reproduce and resolve defects Validate service integrations... 
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    Local area

    KellyMitchell Group

    Greenwood Village, CO
    4 days ago

  • Java API & Spring Boot Developer | REST/SOAP, CI/CD

     ...technology firm is seeking an experienced Conversion and Reporting Developer for a full-time, on-site role. The ideal candidate should...  ...services, and Spring frameworks. Responsibilities also include API development and continuous deployment practices. Working knowledge... 
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    Full time

    PEOPLECORP AMERICA INC

    Denver, CO
    2 days ago

  • Web/Mobile Game Developer - Coding Ninja

     ...on the development of the platform which provides APIs and Technologies that underpin the features being developed for the service. We will leverage your knowledge of...  ...Build exciting new experiences on Fancandy’s web and mobile websites Work with other leads and production... 
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    FanCandy

    Aurora, CO
    2 days ago

  • Senior Mobile & Full-Stack Engineer Remote

     ...ensuring scalability and performance. The ideal candidate has strong JavaScript and TypeScript skills, and experience with PostgreSQL and RESTful APIs. This position offers a 100% remote work option and opportunities for growth within a collaborative team. #J-18808-Ljbffr
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    Remote work

    Coder Technologies Inc.

    Denver, CO
    23 hours ago

  • .NET Backend Engineer

     ...microservices-based systems using .NET 8. The role will design and deliver APIs, leverage Dapr and the actor pattern with Orleans, and integrate...  ...with team members to implement event sourcing patterns. Develop backend services using .NET 8. Work with ERP systems to... 
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    Hourly pay
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    Local area
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    Eliassen Group

    Denver, CO
    11 days ago

  • Software Engineer (Web Developer)

     ...United States. We are currently seeking Software Engineer (Web Developer) for an assignment in Denver - Littleton, CO a multi-year...  ...frameworks such as Backbone.js and Ember.js, D3) Consuming RESTful APIs Using and working in team environments that use agile... 
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    Full time
    Local area
    Immediate start

    Bright Vision Technologies

    Denver, CO
    23 hours ago

  • Backend API Developer (Azure)

    $120k

     ...services IT Operations Agile project management and GIS services. Job Summary NexGen Technologies is seeking a Backend / API Developer (Azure) to support a federal modernization initiative requiring secure API first integration across multiple bureau systems.... 
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    Permanent employment
    Full time
    Contract work
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    Remote work

    Nexgen Technologies

    Lakewood, CO
    25 days ago

  • Tech Consulting - Full-Stack C# Developer - Senior - Multiple Locations

    $102.5k - $187.9k

     ...Tech Consulting - Full-Stack C# Developer - Senior - Multiple Locations Location: Los Angeles...  ...that power their businesses across web, mobile, cloud platforms, physical environments...  ...Build and maintain backend services and APIs using modern backend programming... 
    Suggested
    Summer holiday
    Local area
    Flexible hours

    EY

    Denver, CO
    2 days ago

  • Frontend Engineer (Senior/Staff)

    $100 per hour

     ...Engineer , you’ll build and maintain high-performance, scalable web applications that deliver seamless user experiences. You’ll operate...  ..., and usability principles Experience building and testing APIs; comfort with Postman, and debugging Clear product thinking,... 
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    Immediate start
    Remote work
    Work from home
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    GrabJobs

    Denver, CO
    7 hours agonew

  • Staff Frontend Software Engineer

    $170k - $190k

     ...state management, and component design Develop maintainable and scalable JavaScript/TypeScript...  ...to integrate frontend applications with APIs and data services Implement testing...  ...serving in an architect role for complex web applications ~ Deep understanding of frontend... 
    Suggested
    Summer holiday
    Work at office
    Home office

    Parsyl

    Denver, CO
    1 day ago

  • Senior Back-End Software Application Developer - Clearance Desired

    $112k - $200k

     ...Senior Back-End Software Application Developer - Clearance Desired Job Locations US-CO-Colorado Springs Job ID...  ...functionality, handles user requests, and manages data. Create APIs that allow different parts of the application, or different applications... 
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    Full time
    Local area

    LMI Consulting, LLC

    Colorado Springs, CO
    3 days ago

  • Sr Full-Stack Applications Developer

     ...Sr Full-Stack Applications Developer Sonepar Management Group (SMG) supports our Sonepar brands...  ..., application program interfaces and rich web user interfaces Highly scalable...  ...MVC. Strong Experience in REST and Web API. Working knowledge of relational database... 
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    Full time
    Temporary work
    Local area
    Visa sponsorship

    Sonepar Group

    Broomfield, CO
    2 days ago

  • Full Stack Application Developer

     ...experience mentoring/assisting junior team developers on a team of Front End Technologies/...  ...Technologies/Concepts: .NET core, C# and RESTful API design, Micro-Services Relational (MS...  ...develop.Net solutions to enhance a web enabled Modernized MS Access data collection... 
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    Contract work
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    Work at office
    Local area

    Software Technology Inc

    Denver, CO
    2 days ago

  • Frontend Engineer

    $140k - $190k

     ...for satellite operations and autopilot observability ~ Developing and maintaining our web applications and services ~ Collaborating on UI/UX design...  ...UX) ~ Integrating with backend services using GraphQL APIs ~ Supporting internal teams in using our ground... 
    Temporary work
    Work at office
    Relocation package
    Flexible hours

    Loft Orbital Solutions

    Golden, CO
    13 days ago

  • Software Engineer - Web Developer (Top Secret with agreement to obtain CI Poly)

     ...the NGA based on agency directives. We are developing innovative solutions for geospatial...  ...Required Qualifications: Frontend web development using modern techniques and frameworks...  ...js and Ember.js, D3) Consuming RESTful APIs Using and working in team environments... 
    Flexible hours

    North Point Technology

    Littleton, CO
    11 days ago

  • Senior Frontend Platform Engineer, App Platform

    $224.4k - $283.8k

     ...packages which are used in numerous frontend web applications Frontend architecture and...  ...dynamic and responsive experiences Developer tooling and observability infrastructure to...  ...tags, optimistic updates, and strongly-typed API layers Experience with Storybook... 
    Full time
    Remote work
    Shift work

    GrabJobs

    Denver, CO
    1 day ago

  • Lead UI/UX Design & Research Engineer (Remote)

    $170k - $190k

     ...closely with React/Redux and Full Stack Developers to guide design, execution, and implementation...  ...user experiences while achieving web form optimization and performance. This pivotal...  ...application integrations with REST/SOAP APIs and other established web services.... 
    Full time
    Remote work

    GovCIO

    Denver, CO
    23 hours ago

  • React/Redux Frontend Developer (Remote)

    $90k - $100k

     ...TechnologyOverviewGovCIO is currently seeking React/Redux Frontend Developers to join a cross-functional team dedicated to delivering...  ...on robust application integrations with REST/SOAP APIs and other established web services. Participates in system planning and the... 
    Full time
    Remote work

    GovCIO

    Denver, CO
    4 days ago

  • Lead Senior Database & Backend Engineer

     ...Engineer you will be responsible for building our architecture and API management platform to run our flutter app on firebase using...  ...business, operations and security challenges that arise in these developer ecosystems by proxying API traffic between provider and consumer... 

    Huck Adventures, Inc

    Boulder, CO
    2 days ago

  • Data Scientist/Analyst/Java full stack developer

     ...the skills Knowledge of Core Java, javascript, C++ or software programming Spring boot, microservices, Docker, Jenkins and REST API's experience Excellent written and verbal communication skills Required skills for data science/machine learning... 
    Immediate start
    Remote work

    SynergisticIT

    Boulder, CO
    2 days ago

  • STAFF FRONTEND ENGINEER

    $200k

     ...TypeScript platform. This role focuses on frontend architecture, developer experience, and guiding best practices across a remote...  ...Build and refine complex React/TypeScript SPAs backed by REST APIs Maintain and extend an accessible, reusable design system... 
    Remote work
    Home office

    Fluid Consulting Services

    Boulder, CO
    a month ago

  • Entry Level Web Developer

     ...entry-level software programmers, IT enthusiasts, Python/Java developers, Data analysts/ Data Scientists. We welcome candidates with...  ...software programming Spring boot, Microservices and REST API's experience Excellent written and verbal communication skills... 

    SynergisticIT

    Aurora, CO
    2 days ago

  • Front End UI Developer

    $40 - $53 per hour

     ...Description Job Description Unison Systems is looking for a UI Developer/Designer to join our national telecommunications client growing...  ...2 - 5 years of experience. Looking for React, React-Context-Api, React Hooks, CSS, JavaScript, Material UI. Nice to have is AWS... 
    Hourly pay

    Unison Systems Inc.

    Englewood, CO
    a month ago

  • QE Fullstack Engineer

     ...people goals, gaps, and challenges. We then develop and implement the processes and...  ...remediation steps, and implement solutions in web-based environments Achieve proficiency...  ...technologies is desirable) Experience with API development and cloud computing platforms,... 
    Temporary work
    Work at office

    HirexHire

    Denver, CO
    25 days ago

  • Senior Software Engineer, Backend

     ...for a Senior Software Engineer, Backend to design and scale the APIs and systems that power Foley’s partner ecosystem. You will build...  ...and integration workflows that power partner-facing products Develop secure, reliable distributed systems with a focus on performance... 
    Contract work
    Remote work

    GrabJobs

    Denver, CO
    1 day ago

  • Full Stack Software Engineer

     ...managers, designers, and other engineers to develop new features and enhance existing...  ...(Node.js) and Python. Develop RESTful APIs and integrate with third-party services as...  ...domain related challenges Experience in web technologies and frameworks (JS/TS, HTML,... 
    Remote work
    Flexible hours

    GrabJobs

    Denver, CO
    1 day ago

  • Software Engineer Intern - Product & Backend

    $23 per hour

     ...investigations, evidence views, decision workflows, and operator-facing product surfaces Design and implement backend services, APIs, data models, and application logic Improve code quality through testing, refactoring, documentation, and better engineering practices... 
    Internship
    Summer internship
    Remote work

    GrabJobs

    Denver, CO
    23 hours ago

  • Senior Fullstack Software Engineer (Nova)

    $133.5k - $212k

     ...to integrate frontend workflows with backend services, platform APIs, and internal tooling.Contribute to the evolution of underlying...  ...contributing to or building internal frameworks or developer tooling.Familiarity with agent frameworks, agentic patterns, or... 
    Local area
    Remote work

    Iterable

    Denver, CO
    23 hours ago