Senior Software Engineer (Backend - C#) - TrainingPeaks

Company Information

Join the Team Powering the World's Best Endurance Athletes

At TrainingPeaks, we believe that behind every great athlete is a great coach and the right technology to help them reach their potential. Our platform is trusted by Tour de France winners, Olympic gold medalists, and everyday endurance athletes to plan, track, and analyze their training. Whether you're a performance-driven athlete, a passionate coach, or someone who simply thrives on building tools that empower others, TrainingPeaks is where ambition meets impact.

As part of the Peaksware portfolio, consisting of brands like TrainingPeaks, MakeMusic, Alfred Music, TrainHeroic, we’re united by a shared mission: to create software that transforms deliberate practice into performance. At Peaksware, we don’t just build products. We build communities of motivated people chasing progress, including athletes, musicians, performers, and the teams that support them.

General Summary

Join TrainingPeaks as a Senior Software Engineer on our Workout Data team and help build the future of endurance training.

At TrainingPeaks, we empower athletes and coaches to reach their goals through data-driven performance tools. As a Senior Software Engineer, you’ll play a key role in shaping the technical foundation of those tools. You’ll take ownership of critical systems that process, store, and serve the workout data that drives our platform, from concept to deployment and beyond.

You’ll dive into a dynamic stack, building scalable services, evolving APIs, and transforming modern architectures. You’ll help ensure our platform performs reliably at scale, supporting the world's best endurance athletes and their coaches.

This isn’t a role where you’ll be handed specs and left in a silo. You’ll be part of architecture discussions, mentor teammates, and bring new ideas to the table. You’ll be encouraged to experiment, grow your skills, and lead meaningful improvements to our tech and our team. If you're passionate about clean code, system performance, and real-world impact, we want to hear from you.

You thrive on collaboration, continuous learning, and solving tough problems. You value craft, care deeply about product quality, and are motivated by the knowledge that your work helps real people achieve peak performance.

You will sit directly with the Engineering Team and report to the Manager, Engineering. 

Core Functions: 

• Build features that athletes and coaches love. Regularly ship thoughtful, user-focused functionality that evolves with our growing customer base and raises the bar for performance.
• Tackle complex technical challenges to ensure our systems stay fast, reliable, and resilient.
• Design and implement backend and frontend systems that elevate team productivity, code quality, and long-term maintainability.
• Craft stable, scalable, and well-documented APIs that power our products and support our internal and external development partners.
• Help elevate the skills of your teammates by coaching junior engineers and sharing your expertise in code reviews and architecture discussions.
• Contribute to a culture of clean, performant, and secure code through collaborative reviews and continuous improvement.
• Participate in our on-call rotation (~1 week per quarter) to keep our platform running smoothly and reliably.
• Help foster open communication, promote best practices, and explore emerging technologies to keep our team sharp and forward-thinking.

Required Qualifications:

• Experience developing in an Object Oriented programming language such as Java or C#.
• Experience working with Relational Database Systems such as SQL Server or Postgres.
• Experience designing and building Restful APIs
• 5+ years of experience working on challenging problems in complex applications
• Experience addressing problems of scale
• Experience with CI/CD processes and tools such as TeamCity, Jenkins, etc.
• Experience refactoring applications and seeing architectural changes through from design to completion
• Experience with AWS or similar cloud technologies
• Strong written and verbal communication skills
• Demonstrated commitment to continuous improvement of yourself and your team
• Degrees are not required and we value all forms of continued education including traditional four-year degrees, post-graduate degrees, associates degrees, bootcamps, online training, professional certifications, self-teaching and more.
• Experience with automated unit testing, and writing highly testable code

Benefits

Compensation

Peaksware/TrainingPeaks is committed to fair and equitable compensation practices. The annual compensation range for this role in Colorado is $111,216 - $185,360. Final compensation for this role will be determined by various factors such as a candidate’s relevant work experience, skills, and certifications.

This role is eligible for variable compensation, including bonus.

Benefits and Perks

Health

• Medical
• Dental
• Vision
• Health Savings Account
• Flexible Spending Account
• Dependent Care Flexible Spending Account
• Paid Parental Leave
• Teladoc
• Employee Assistance Program (EAP)
• Additional coverage options such as accident and critical illness insurance and hospital indemnity

Disability and Life

• Company-paid Short Term Disability
• Company-paid Long Term Disability
• Company-paid Basic Life Insurance and AD&D
• Employee-paid Supplemental Life Insurance for Employee, Spouse, and/or Child

Additional

• 401(K)
• 401(K) Matching
• Pet Insurance
• 12 paid holidays annually and unlimited Flexible Time Off (FTO)
• Free TrainingPeaks, TrainHeroic, MakeMusic accounts, and Alfred Music product
• Access to the Performance and Recovery Center (PARC), our on-site fitness facility
• Employee only access to on-site locker rooms and showers
• Employee only access to secure, indoor bike storage
• Access to our onsite Music Studio
• An assortment of “grab’n go” fruit and snacks as well as on tap cold brew, kombucha, and beer.
• Beautiful onsite cafe that includes indoor and outdoor seating and lounge areas.
• Access to e-bikes available exclusively to Peaksware employees
• Significant investment in resources for employee growth and development
• Corporate discounts on select gym memberships and top brand gear
• Flexible work schedule in a culture of trust

Please contact [email protected] if you require a reasonable accommodation to review our website or to apply online.

Peaksware adheres to the FLSA Exemption Threshold for minimum wage in all states.

Work Environment

This job operates in a professional office environment that is well-lighted, heated, and/or air-conditioned with adequate ventilation and a noise level that is usually moderate. This role routinely uses standard office equipment such as computers, phones, photocopiers and filing cabinets.

All employees must comply with all safety policies, practices and procedures. Report all unsafe activities to your manager and/or Human Resources.

Physical Demands

While performing the duties of this job, the employee is regularly required to sit and move about the facility; use hands to handle, or feel; talk by expressing ideas by means of the spoken word; and hear by perceiving the nature of sounds. The employee is occasionally required to stand, walk, and reach with hands and arms. The employee must occasionally lift and/or move up to 10 pounds. Specific vision abilities required by this job include close vision, distance vision, color vision, peripheral vision, depth perception, and ability to adjust focus.

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