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React Js Contract Jobs in Colorado (NOW HIRING)

Two Six Technologies

UI/UX Developer

Aurora, CO · On-site

$84K - $152K/yr

TypeScript, JavaScript, CSS/SCSS, HTML5, and modern web frameworks such as Vue.js, React, and/or ... as contract specific affordability and organizational requirements. Salary Range $84,600-$152,400 ...

Via Logic LLC

Mid-Level Software Engineer

Englewood, CO · On-site

$110 - $140/hr

US citizenship is required per contract. * Bachelor's degree in Computer Science, Software ... React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, or Svelte * Cloud Development:

Leidos

Mid-Level Software Engineer

Englewood, CO · On-site

US citizenship is required per contract. * Bachelor's degree in Computer Science, Software ... React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, or Svelte * Cloud Development:

Leidos

Mid-Level Software Engineer

Englewood, CO · On-site

$87K - $157K/yr

US citizenship is required per contract. * Bachelor's degree in Computer Science, Software ... React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, or Svelte * Cloud Development:

tuffshed

Sr Software Developer

Center, CO

$47.75 - $63.25/hr

Building and improving APIs and event-based schemas, specs, and contracts. * Building and improving ... Direct experience with React, Next.js or other modern front-end frameworks. * Direct experience ...

PRI Global

Word Press Engineer

Arvada, CO · On-site

PRI Global is seeking a skilled WordPress Engineer to join their team on a full-time contract basis ... • Basic to intermediate JS for frontend interactivity, carousels, menu behavior, and DOM ...

tuffshed

Sr Software Developer

Center, CO · On-site

$47.75 - $63.25/hr

Building and improving APIs and event-based schemas, specs, and contracts. * Building and improving ... Direct experience with React, Next.js or other modern front-end frameworks. * Direct experience ...

Tuff Shed

Sr Software Developer

Denver, CO · On-site

$110K - $150K/yr

Building and improving APIs and event-based schemas, specs, and contracts. * Building and improving ... Direct experience with React, Next.js or other modern front-end frameworks. * Direct experience ...

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React Js Contract information

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How much do react js contract jobs pay per hour?

As of Aug 15, 2026, the average hourly pay for react js contract in Colorado is $57.77, according to ZipRecruiter salary data. Most workers in this role earn between $50.58 and $65.72 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the React JS contract position, and why are they important?

To thrive as a React Js Contract developer, you need a strong proficiency in React.js, JavaScript (ES6+), and front-end component architecture, often backed by a degree in computer science or relevant industry experience. Familiarity with tools such as Redux, RESTful APIs, Git, and modern build systems, and sometimes certifications like AWS or Scrum, can enhance your effectiveness. Strong problem-solving abilities, excellent communication, and the ability to quickly adapt to new teams and projects are valuable soft skills in this role. These competencies are critical for delivering robust, maintainable applications end-to-end in fast-paced, contract-based environments.

What kind of projects and team structures do React JS contract developers typically work on?

React Js Contract developers are often engaged in short- to mid-term projects that focus on building, enhancing, or modernizing user interfaces for web applications. They typically collaborate within agile teams that include designers, back-end developers, and product managers, often joining established workflows to address immediate or specific needs. The work environment is usually dynamic, requiring quick integration into the team and clear communication to align with project goals. Contractors might contribute to greenfield development, UI redesigns, or performance optimization initiatives, with responsibilities varying depending on the client and project stage. This variety offers the opportunity to gain exposure to diverse industries and tech stacks, supporting ongoing skill development and career growth.

What is a React JS contract?

A React Js Contract job is a temporary or project-based role where a developer specializes in building user interfaces using React.js. These contracts can range from a few months to a year and may involve working with companies on specific frontend tasks. Contractors typically focus on developing, maintaining, and optimizing React applications while collaborating with teams remotely or on-site. This type of job offers flexibility, competitive pay, and opportunities to work on diverse projects.

What are the most commonly searched types of React Js jobs in Colorado?

The most popular types of React Js jobs in Colorado are:

What are popular job titles related to React Js Contract jobs in Colorado?

For React Js Contract jobs in Colorado, the most frequently searched job titles are:

What job categories do people searching React Js Contract jobs in Colorado look for?

The top searched job categories for React Js Contract jobs in Colorado are:

What cities in Colorado are hiring for React Js Contract jobs?

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React Js Contract jobs near you
Infographic showing various React Js Contract job openings in Colorado as of August 2026, with employment types broken down into 41% Full Time, and 59% Contract. Highlights an 88% In-person, and 12% Remote job distribution, with an average salary of $120,152 per year, or $57.8 per hour.

Senior Software Engineer

Odyssey Systems Consulting Group, Ltd.

Colorado Springs, CO • On-site

$130K - $160K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 20 days ago

Job description

Position Summary
We are seeking a Senior Software Engineer to be a primary technical contributor on the Multimode Threat Engagement Simulation Platform. You will own significant portions of the stack end-to-end - building the Julia computation backend, the React/TypeScript/CesiumJS frontend, and the CI/CD pipeline that delivers standalone Windows and Linux artifacts - with a primary emphasis on high-performance and scientific computing. You will work closely with the Lead Engineer on architecture decisions and with domain engineers (RF, EO/IR) to implement their physics models in a performant, maintainable form.
This role demands genuine depth in high-performance compute application development. The backend is not a conventional web API - it runs trajectory integration, Monte Carlo simulation across thousands of runs, and real-time surrogate model inference. You should be comfortable profiling and optimizing numerical code, reasoning about parallelism, and making informed trade-offs between simulation fidelity and throughput.
***Contingent upon contract award***
Responsibilities
High-Performance Computation Backend
  • Implement and optimize the Julia physics computation server: trajectory integration (RK4/RK45 schemes via DifferentialEquations.jl), SGP4 orbital propagation (SatelliteToolbox.jl), and Monte Carlo driver with Threads.@threads parallelism
  • Profile and optimize computation-critical paths; benchmark throughput and latency against program requirements (e.g., 10,000 Monte Carlo runs within a defined wall-clock target)
  • Integrate ONNX.jl surrogate model inference for real-time parameter sweep capabilities; ensure inference latency meets the <1ms interactive target
  • Implement CZML generation from physics outputs - trajectory arcs, satellite orbital paths, coverage footprints - for time-dynamic Cesium visualization
  • Design and maintain the mission data model: JSON serialization, versioned file format with backward compatibility, and cross-platform path handling for Windows and Linux
  • Implement the HTTP.jl API layer with well-defined request/response schemas, appropriate error handling, and structured logging

Frontend and Visualization
  • Build React/TypeScript components for the mission planning interface: tabbed mission overview, asset and task tree views, mission parameter forms, and the analysis panel
  • Integrate and maintain the CesiumJS/Resium 3D globe: asset markers, trajectory rendering, satellite ground tracks, coverage footprints, and CZML-driven animation with the Cesium timeline
  • Manage frontend application state (mission data, UI state, async physics query results) using appropriate state management patterns for a data-heavy desktop application
  • Implement data-driven analysis visualizations - trajectory plots, Pk curves, Monte Carlo distribution charts - using Recharts, Plotly.js, or equivalent

DevOps and Cross-Platform Packaging
  • Maintain the CI/CD pipeline in GitHub Actions: automated builds producing Windows NSIS installers and Linux AppImages from a single codebase
  • Manage PackageCompiler.jl sysimage builds for the Julia physics server binary on both target platforms
  • Maintain electron-builder configuration and platform-specific packaging scripts; validate installer behavior on clean Windows and Linux test environments
  • Implement build-time embedding of ONNX model files and asset resources; manage versioning of bundled artifacts

***Contingent upon contract award***
Qualifications
Citizenship: Must be a US citizen
Minimum Required Qualifications
Clearance: Active Secret Clearance
Education: B.S. in Computer Science, Software Engineering, Electrical Engineering, Physics, or related STEM field
Years of Experience: 5+ years of software development experience, with demonstrated depth in at least one of the following areas: scientific computing, numerical simulation, high-performance computing, or data-intensive desktop applications
Certifications: NA
Additional Skills
  • Proficiency in TypeScript/React or equivalent modern frontend framework
  • Experience with a compiled or JIT-compiled high-performance language (Julia, C++, Rust, Fortran, or Python with NumPy/Numba/Cython extensions)
  • Understanding of parallel computing patterns relevant to numerical workloads: thread-level parallelism, SIMD, memory-access optimization
  • Experience with REST API design and implementation as a client-server boundary within a single-machine application

Preferred Qualifications
Clearance: Active TS/SCI
Education: MS degree
Certifications: NA
Preferred Skills
  • Direct experience with Julia and the SciML / DifferentialEquations.jl ecosystem; PackageCompiler.jl sysimage generation
  • Experience with CesiumJS, Resium, and CZML for 3D geospatial visualization
  • Familiarity with orbital mechanics, trajectory simulation, or atmospheric modeling at an implementation level (not just theoretical)
  • Experience with ONNX Runtime, ONNX.jl, or equivalent ML inference frameworks
  • Experience with Electron and electron-builder for cross-platform desktop deployment
  • Familiarity with at least one sensor or physics domain: radar detection, EO/IR performance, acoustic propagation, or multi-sensor tracking - at the level of understanding model inputs/outputs and integrating them correctly

Additional Information
Location: Colorado Springs, CO or Boston, MA
Travel: Approx. 15-20%
Remote, Onsite, or Hybrid: Hybrid
#LI-JK1
***Contingent upon contract award***
Company Overview
Odyssey is a world-class technical, engineering, and integration company serving the warfighting ecosystem with airborne integration, ISR, C2, and warfighter readiness capabilities. Odyssey meets the military's operational needs by integrating layered defense systems from equipment, technology, and services to data, information, and business operations. We streamline defense acquisition and sustainment, engineering the technical battlefield with domain-specific proficiency to ensure lethality. Odyssey is dedicated to excellent contract execution, peak organizational performance, and fostering a workplace built on employee care.
Odyssey is proud to live out our core values of commitment, ambition, and respect in our work and communities through OdysseyCares, a philanthropic group focused on giving back through direct donations, an employer match program, and volunteering events.
Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
Please Note:
Final compensation for this position will be determined by various factors such as the Federal Government contract labor categories and contract wage rates, relevant work experience, specific skills and competencies, geographic location, education, and certifications.
This position is filled through continuous recruitment and will remain open until a sufficient pool of applications has been received.
Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, Tricare supplement, short-term disability, long-term disability, 401(k) match, flexible spending accounts, health savings accounts, employee assistance program, learning and development benefit, paid time off, and holidays.
Odyssey Benefits

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