Senior Staff Full Stack Engineer

About the role

You are a senior full stack individual contributor who drops into the most ambiguous, cross-stack problems at Strava before prescribing a fix. You will own the diagnosis of high-stakes issues that span client and server, navigating systems you did not build and teams you do not directly manage. This role exists to unblock critical product bets by reasoning fluently across iOS, Android, Go, and Scala platforms. You will act as a trusted agent of change, set technical direction, and partner with leadership to surface and attack recurring product and technical opportunities. Your work will directly impact organic growth and subscriber value initiatives as you bridge what is on fire today with what needs to be built next, including newly integrated parts of the business like our work with Runna. You will operate with senior judgment in ambiguous environments, earning the trust of leadership while driving measurable impact on the company's riskiest technical bets.

Key facts

What you'll do

• Drop into ambiguous, cross-stack problems and diagnose what is actually happening before prescribing a fix.
• Reason fluently across client and server systems to unblock high-priority product initiatives across iOS, Android, Go, and Scala platforms.
• Drive measurable impact on critical bets, starting with initiatives in our organic growth and subscriber value areas.
• Act as a trusted agent of change inside teams and parts of the business you do not own.
• Partner with leadership and senior ICs to surface recurring product and technical opportunities worth attacking proactively.
• Set technical direction and bring people with you on the highest-risk work in the company.
• Navigate recently acquired or integrated organizations, including prior experience with Runna, to ensure smooth technical integration.
• Provide senior technical judgment to define long-term architecture while balancing short-term fixes for production-critical issues.
• Collaborate with product managers, designers, and data teams to translate ambiguous problems into actionable technical strategies.
• Mentor other engineers by example, demonstrating how to operate effectively in systems without clear ownership.
• Identify and remove cross-team blockers that prevent timely delivery of high-impact initiatives.
• Translate business objectives into technical roadmaps that balance user value with system reliability and scalability.
• Contribute to on-call responsibilities for critical services, ensuring rapid diagnosis and mitigation of production incidents.
• Build credibility and trust with stakeholders by delivering consistent, high-quality outcomes in fast-moving environments.

Requirements

• You have genuine full-stack range, with the ability to operate in systems you did not build across web, mobile, and backend services.
• You have a track record of entering unscoped, cross-team technical problems and driving them to resolution without formal authority.
• You can influence and drive change through clear communication, technical excellence, and persistence.
• You possess senior technical judgment, setting direction and earning the trust of leadership while operating well in ambiguity.
• You are comfortable navigating complex organizational structures, including recently acquired or integrated parts of the business.
• You have prior experience with high-stakes, cross-platform initiatives involving iOS, Android, Go, and Scala.
• You have a history of performing in tiger-team, fixer, or SWAT-style roles at scale under tight deadlines.
• You are able to work effectively with stakeholders at all levels, from individual contributors to executive leadership.
• You understand the demands of building and maintaining large-scale consumer-facing systems that serve a global community of athletes.
• You are committed to writing clean, maintainable code while balancing the need for speed in production-critical scenarios.

Nice to have

• Experience navigating a recently acquired or integrated organization is a plus.
• A prior tiger-team, fixer, or SWAT-style role at scale is a plus.

Practical notes

We follow a flexible hybrid model that translates to more than half of your time on-site in our San Francisco office, three days per week.