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Freelance Senior Software Engineer Jobs in Colorado

247Hire

Senior Software Engineer

Englewood, CO · On-site

$110 - $140/hr

Our client in Englewood Colorado is looking for a Senior Software Engineer on a direct hire basis. This is an opportunity to join a collaborative, fast-paced development team where your work will ...

New

247Hire

Senior Software Engineer

Greenwood Village, CO · On-site

$110 - $140/hr

Our client in Englewood Colorado is looking for a Senior Software Engineer on a direct hire basis. This is an opportunity to join a collaborative, fast-paced development team where your work will ...

New

3B Staffing LLC

Senior Software Engineer

Fort Collins, CO · On-site

$121K - $159K/yr

Senior Software Engineer / Technical Lead Location: Fort Collins / Loveland / Longmont, CO (Hybrid) Duration: Contract GC, USC Video Interview TypeScript, GraphQL, AWS Lambda (serverless), strong ...

3B Staffing LLC

Senior Software Engineer

Fort Collins, CO · On-site

$121K - $159K/yr

Senior Software Engineer / Technical Lead Location: Fort Collins / Loveland / Longmont, CO (Hybrid) Duration: Contract GC, USC Video Interview TypeScript, GraphQL, AWS Lambda (serverless), strong ...

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3, to support our customer in Littleton, CO.Summary:

OASYS

Senior Software Engineer

Littleton, CO · Hybrid

$120K - $158K/yr

Senior Software Engineer Staff, Level 5 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer Staff, Level 5 to support our customer in Littleton, CO.

OASYS

Senior Software Engineer

Littleton, CO · Hybrid

$120K - $158K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3, to support our customer in Littleton, CO. Summary:

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3, to support our customer in Littleton, CO. Summary:

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$180K - $230K/yr

Senior Software Engineer Staff, Level 5 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer Staff, Level 5 to support our customer in Littleton, CO.

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$180K - $230K/yr

Senior Software Engineer Staff, Level 5OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer Staff, Level 5 to support our customer in Littleton, CO.

OASYS

Senior Software Engineer

Littleton, CO · Hybrid

$120K - $158K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3 to support our customer in Littleton, CO. Summary:

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3 to support our customer in Littleton, CO. Summary:

ApplyMint

Senior Software Engineer

Denver, CO · On-site

$120 - $190/hr

Senior Software Engineer Location: San Francisco, CA or Denver, CO (Hybrid, 3 days/week). Salary: $120k-$190k + equity. Full-time. Offstream is building the infrastructure for the environmental ...

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3 to support our customer in Littleton, CO.Summary:

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Freelance Senior Software Engineer information

What is the difference between Freelance Senior Software Engineer vs Freelance Software Developer?

AspectFreelance Senior Software EngineerFreelance Software Developer
Experience LevelTypically 5+ years, with leadership and architecture skillsVaries from entry-level to mid-level, focused on coding and implementation
ResponsibilitiesDesigning systems, leading projects, mentoringWriting code, developing features, fixing bugs
CredentialsStrong portfolio, possibly certifications like AWS, ScrumPortfolio, coding skills, possibly certifications
Work EnvironmentRemote or client-site, often in tech companies or startupsRemote or client-site, in various industries

Freelance Senior Software Engineers typically have more experience, leadership responsibilities, and focus on system design, while Freelance Software Developers concentrate on coding and feature development. Both roles are in high demand in the freelance market, but the senior role often commands higher rates due to expertise and project scope.

What are some common challenges faced by freelance senior software engineers when managing multiple client projects simultaneously?

Freelance Senior Software Engineers often juggle multiple projects for different clients, which can present challenges such as balancing competing deadlines, adapting to varying coding standards, and maintaining clear communication across diverse teams. Time management and setting realistic expectations are crucial to ensure high-quality deliverables. Additionally, staying up to date with new technologies and industry best practices helps maintain a competitive edge and satisfy client requirements.

What are the key skills and qualifications needed to thrive as a freelance senior software engineer, and why are they important?

To thrive as a Freelance Senior Software Engineer, you need advanced programming expertise, strong problem-solving skills, and a proven track record in software development, often backed by a relevant degree and years of experience. Familiarity with version control systems like Git, cloud platforms such as AWS or Azure, and mastery of frameworks and languages (e.g., JavaScript, Python, Java) are crucial, along with certifications like AWS Certified Solutions Architect or Microsoft Certified: Azure Developer Associate. Outstanding communication, time management, and self-motivation are vital soft skills for independently managing projects and collaborating with diverse clients. These competencies ensure you can deliver high-quality, scalable solutions while building strong client relationships and managing multiple projects efficiently.

What is a freelance senior software engineer?

Freelance Senior Software Engineers are highly experienced software professionals who work independently rather than as full-time employees of a single company. They take on contract-based projects for various clients, often leading development teams, architecting systems, and solving complex technical problems. Their responsibilities typically include coding, reviewing code, mentoring junior engineers, and ensuring that software solutions meet client requirements. Freelance senior engineers offer flexibility and specialized expertise, making them a valuable asset for businesses needing advanced software solutions without long-term commitments.
What are the most commonly searched types of Senior Software Engineer jobs in Colorado? The most popular types of Senior Software Engineer jobs in Colorado are:
What are popular job titles related to Freelance Senior Software Engineer jobs in Colorado? For Freelance Senior Software Engineer jobs in Colorado, the most frequently searched job titles are:
What job categories do people searching Freelance Senior Software Engineer jobs in Colorado look for? The top searched job categories for Freelance Senior Software Engineer jobs in Colorado are:
What cities in Colorado are hiring for Freelance Senior Software Engineer jobs? Cities in Colorado with the most Freelance Senior Software Engineer job openings:
Freelance Senior Software Engineer jobs near you
Infographic showing various Freelance Senior Software Engineer job openings in Colorado as of August 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution.

Senior Software Engineer

247Hire

Englewood, CO • On-site

$110 - $140/hr

Other

Medical, Dental, Vision, Retirement, PTO

Posted yesterday

New

Job description

Our client in Englewood Colorado is looking for a Senior Software Engineer on a direct hire basis. This is an opportunity to join a collaborative, fast-paced development team where your work will directly influence the evolution of a cutting-edge technology platform. If you enjoy solving complex technical challenges, working with modern Microsoft technologies, and contributing to a product-driven environment, this is an excellent opportunity to make an impact.

Company Profile
  • Transportation Technology
  • Great team with a great company culture
  • Weekly team lunches
Senior Software Engineer Role
  • The Software Engineer will play a key role in designing, developing, and supporting enterprise-level applications within a collaborative Agile development environment.
  • Design, develop, and maintain scalable full-stack applications using modern Microsoft technologies
  • Build intuitive, user-friendly interfaces from product concepts, wireframes, or minimal design direction
  • Design and integrate complex software solutions across web, API, and mobile platforms
  • Support applications spanning web portals, APIs, and mobile technologies
  • Collaborate closely with Product Owners, Quality Assurance Engineers, and fellow developers throughout the software development lifecycle
  • Participate in Agile ceremonies including sprint planning, stand-ups, retrospectives, and code reviews
  • Contribute to architecture discussions, peer mentoring, and continuous process improvements
  • Research and implement emerging technologies that improve scalability, performance, and user experience
Senior Software Engineer Background Profile
  • 4+ years of professional software development experience using C#
  • 4+ years of experience developing with .NET Core 3.x or newer
  • 4+ years of experience with Entity Framework Core, SQL databases, HTML, and CSS
  • Experience with Blazor or another modern web application framework
  • Ability to design, implement, and integrate enterprise-level software solutions
  • Experience working with Azure DevOps or similar development platforms
  • Experience working within Agile development environments utilizing Git source control
  • Strong written and verbal communication skills
  • Self-motivated, detail-oriented, and deadline-driven
  • Comfortable participating in code reviews, technical discussions, and collaborative problem-solving
  • Passion for learning new technologies and continuously improving development practices
Features and Benefits
  • Medical
  • Dental Vision
  • PTO
  • 401k with match
  • Gym Membership
Senior Software Engineer Background Profile
  • 4+ years of professional software development experience using C#
  • 4+ years of experience developing with .NET Core 3.x or newer
  • 4+ years of experience with Entity Framework Core, SQL databases, HTML, and CSS
  • Experience with Blazor or another modern web application framework
  • Ability to design, implement, and integrate enterprise-level software solutions
  • Experience working with Azure DevOps or similar development platforms
  • Experience working within Agile development environments utilizing Git source control
  • Strong written and verbal communication skills
  • Self-motivated, detail-oriented, and deadline-driven
  • Comfortable participating in code reviews, technical discussions, and collaborative problem-solving
  • Passion for learning new technologies and continuously improving development practices
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About 247Hire

Sourced by ZipRecruiter

Industry

Recruiting and staffing services

Company size

201 - 500 Employees

Headquarters location

Oak Brook, IL, US

Year founded

2002

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