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Top C# Jobs in Denver & Boulder, CO

20+ Job Results
2 Days Ago
Colorado, CO
7+ Years of Experience
7+ Years of Experience
Aerospace • Cybersecurity • Defense • Manufacturing
Develop user-facing features for spacecraft operations, translate requirements into code, build APIs, engineer algorithms, write tests and documentation, collaborate with teams, participate in technical design.
Top Benefits:
401-K
401-K Matching
Commuter Benefits
+19 More
3 Days Ago
Colorado, CO
Remote
3,300 Employees
5-7 Years of Experience
3,300 Employees
5-7 Years of Experience
Information Technology • Security • Cybersecurity
Cloudflare is seeking a Senior Software Engineer to work on the development of D1, Cloudflare's first serverless database. The role involves building and defining the future of D1 to enable developers to build full-stack applications. Responsibilities include building full-stack web applications, knowledge of various programming languages, experience operating SaaS applications, designing and building APIs, and a strong understanding of computer science fundamentals.
Top Benefits:
401-K
Child Care Benefits
Commuter Benefits
+45 More
3 Days Ago
Colorado, CO
69 Employees
111K-185K Annually
5-7 Years of Experience
69 Employees
111K-185K Annually
5-7 Years of Experience
Fitness • Software
As a Senior Software Engineer at TrainingPeaks, you will be responsible for creating and supporting sites and services, developing front & backend code, improving system scalability, mentoring junior developers, and driving open team communication. The role involves contributing to product development, architecture/design discussions, and continuous learning.
Top Benefits:
401-K
401-K Matching
Company Outings
+39 More

Featured Jobs

3 Days Ago
Colorado, CO
269 Employees
111K-185K Annually
5-7 Years of Experience
269 Employees
111K-185K Annually
5-7 Years of Experience
Fitness • Music • Software
As a Senior Software Engineer at TrainingPeaks, you will be responsible for developing and supporting sites and services, improving system scalability, refactoring code, and driving architecture decisions. You will mentor junior developers and contribute to team communication and best practices.
Top Benefits:
401-K
401-K Matching
Company Outings
+39 More
5 Days Ago
Colorado, CO
2,000 Employees
105K-157K Annually
3-5 Years of Experience
2,000 Employees
105K-157K Annually
3-5 Years of Experience
Aerospace • Hardware • Information Technology • Robotics
Join Sierra Space as a Systems Engineer III - Ground Networks, responsible for designing, integrating, and testing secure ground networks for space platforms. Develop ground network requirements, integration and test plans, and work on CI/CD pipelines for ground infrastructure. Must have a Bachelor's degree in System Engineering and 6+ years of experience in multi-disciplinary design and development teams.
Top Benefits:
401-K
401-K Matching
Company-Sponsored Family Events
+28 More
6 Days Ago
Colorado, CO
Remote
3,000 Employees
3-5 Years of Experience
3,000 Employees
3-5 Years of Experience
Cloud • Software
As a Senior Site Reliability Engineer at Xero, you will help teams deliver a great customer experience by enhancing system reliability and robustness. Responsibilities include incident management, troubleshooting, post-incident analysis, and promoting reliability best practices. Required skills include experience in logging, monitoring, observability, incident management, and proficiency in programming languages or infrastructure-as-code.
Top Benefits:
401-K
401-K Matching
Commuter Benefits
+36 More
9 Days Ago
Colorado, CO
Remote
400 Employees
215K Annually
5-7 Years of Experience
400 Employees
215K Annually
5-7 Years of Experience
Cloud • Security • Software • Cybersecurity
Staff Software Engineer role at Red Canary, responsible for building and enhancing the Red Canary platform and products, shipping high-quality SaaS features, collaborating with Product Management, and ensuring 24/7 product support.
Top Benefits:
401-K
Child Care Benefits
Commuter Benefits
+32 More
18 Days Ago
Colorado, CO
Hybrid
2,506 Employees
65K-75K Annually
3-5 Years of Experience
2,506 Employees
65K-75K Annually
3-5 Years of Experience
Information Technology • Insurance • Software
As a Site Reliability Engineer I at Vertafore, you will be responsible for building knowledge on application architecture, addressing support escalations, debugging, and collaborating with product teams. Automating support processes, ensuring high availability, and proactive monitoring are key tasks to optimize customer experience.
Top Benefits:
401-K
401-K Matching
Adoption Assistance
+52 More
4 Days Ago
Colorado, CO
3,273 Employees
110K Annually
3-5 Years of Experience
3,273 Employees
110K Annually
3-5 Years of Experience
Aerospace
Seeking a Senior Software Engineer to provide front-end and back-end enhancement and maintenance to critical mission systems. Responsibilities include designing, developing, testing, and debugging application software, as well as collaborating with subject matter experts in system development.
13 Days Ago
Colorado, CO
114 Employees
90K-120K Annually
5-7 Years of Experience
114 Employees
90K-120K Annually
5-7 Years of Experience
Transportation
Join PriceAdvantage as a Software Engineer to work on building new product enhancements and fixing defects in a fast-paced agile development environment. Responsibilities include writing code in both Windows and Web environments, performing tests on new features, and reviewing code written by other Software Engineers. This role has a significant impact on the success of the PriceAdvantage division.
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