Machine Learning Engineer at Strava | San Francisco

Join Strava: Where Active Lives ThriveStrava is the premier application for active individuals, boasting a vibrant community of over 180 million athletes across more than 185 countries. It's not just about tracking workouts; it's about fostering progress and achieving personal milestones together. Whether you enjoy running, cycling, swimming, or any other sport, Strava is your partner in success. Connect with others, surpass your goals, and ensure that every effort counts. Embark on your journey with Strava today.Our mission is straightforward: to inspire individuals to lead their most active and fulfilling lives. We firmly believe in the transformative power of movement to unite and propel people forward.As part of the Foundation engineering team at Strava, you will play a critical role in maintaining the infrastructure that supports millions of athletes worldwide. We design and refine tools and systems that empower our developers, sales, and support teams to deliver features with confidence, safety, and efficiency. In your role as a Senior Engineer, you will be instrumental in shaping and enhancing Strava’s internal platform and administrative tools. This is your chance to significantly impact by modernizing internal tools for customer support teams, enhancing their productivity and their ability to deliver outstanding athlete experiences.We embrace a hybrid work model, allowing you to spend more than half your time on-site at our San Francisco office — three days each week.

Join Strava as a Senior Machine Learning Engineer and contribute to our mission of helping athletes perform better. In this role, you will design and implement advanced machine learning algorithms to enhance the Strava experience for millions of users globally. You will collaborate with cross-functional teams to drive innovation and ensure our technology remains at the forefront of the industry.

About StravaStrava is the premier application for active individuals. With a vibrant community of over 180 million athletes across more than 185 countries, Strava goes beyond mere workout tracking; it fosters collective progress, helping users form new habits and achieve personal bests. Regardless of your chosen sport or tracking method, Strava is your complete companion. Connect with your peers, surpass your goals, and ensure every effort counts. Embark on your journey with Strava today.Our mission is straightforward: to inspire individuals to embrace their best active lives. We harness the transformative power of movement to forge connections and propel people forward.Role OverviewWe are on the lookout for a Senior Technical Program Manager to spearhead intricate, high-priority security initiatives that intersect with Engineering, Infrastructure Product, Legal, Operations, and other cross-functional teams. This position will deliver dedicated program management support for security endeavors, ensuring transparent communication, efficient processes, and structured execution throughout the organization.The successful candidate will possess a robust background in managing complex technical programs, a thorough grasp of security principles, and the capacity to collaborate effectively with engineering and product teams to deliver secure, scalable solutions. You will excel in a dynamic, sophisticated atmosphere, overseeing programs from conception to delivery, mitigating risks, and ensuring alignment among various stakeholders.We embrace a flexible hybrid work model, which typically requires you to spend more than half your time on-site at our SF office — three days each week.Your ResponsibilitiesLead the end-to-end execution of multi-quarter security initiatives—including IAM upgrades, vulnerability management enhancements, compliance readiness projects, and security architecture modifications—from proposal to launch, operational rollout, and post-launch refinement.Facilitate collaboration among Engineering, IT, Product, Legal, and GRC, acting as the central point of alignment across time zones to eliminate ambiguity, streamline decision-making, and sustain progress.Manage program communications, creating clear status updates, designing and pulling key metrics, executive briefings, risk logs, and decision records to provide stakeholders at all levels with timely, actionable insights.Proactively identify and mitigate risks by executing structured assessments of dependencies, resources, and requirements.

Join Strava as a Senior Server Engineer in Our Identity Platform TeamAt Strava, we empower over 180 million athletes in more than 185 countries to track their activities and achieve their fitness goals. Our app is more than just a workout tracker; it’s a vibrant community where individuals can connect, share progress, and inspire one another. Whether you’re a runner, cyclist, or fitness enthusiast, Strava helps you find your crew and crush your personal bests. Embark on your journey with us today!Our mission is clear: to inspire people to lead their most active lives. We recognize the transformative power of movement in connecting individuals and propelling them forward.About This PositionWe are seeking a Senior Server Engineer to become a vital part of our Identity Engineering Team. This team is responsible for ensuring a secure and seamless experience for every athlete accessing Strava. Our identity systems go beyond mere authentication; they create a foundation of trust, security, and continuity across all our applications and platforms.This role follows a flexible hybrid model, requiring you to work on-site in our San Francisco office three days a week.Key Responsibilities:Develop core capabilities for the Identity platform, focusing on authentication, authorization, token lifecycle management, session continuity, and account security.Design and implement scalable and reliable server-side services to support account creation, login processes, account recovery, multi-factor authentication (MFA), and cross-application identity management.Enhance and innovate modern identity protocols by integrating standards such as OAuth 2.0, OpenID Connect (OIDC), WebAuthn, biometrics, and secure token exchange.Refine identity flows across our iOS, Android, and web platforms to ensure a frictionless user experience without compromising security.Collaborate with cross-functional teams, including Product, Security, Trust & Safety, Legal, and Mobile/Web Engineering, to create identity solutions that prioritize safety and privacy while supporting growth.Promote technical excellence by contributing architectural insights and shaping long-term Identity strategies.Mentor and support fellow engineers, fostering a collaborative and inclusive environment.Influence system design across teams, leveraging your expertise in identity to lead discussions on security, performance, and scalability.

About Strava Strava brings together a global community of over 180 million athletes across more than 185 countries. The platform goes beyond tracking workouts, it's a place where people support each other in building habits, achieving goals, and celebrating milestones. Strava welcomes anyone passionate about movement, whether cycling, running, swimming, or another sport. Learn more about Strava subscriptions. The company’s mission is to inspire people to live their most active lives, believing that movement connects and motivates individuals everywhere. Role Overview: Senior Server Engineer II, Subscriptions This position sits within the Subscriptions Team, which focuses on the systems behind Strava’s web and mobile payments and subscription experience. The team manages backend infrastructure, supports lifecycle experiments to grow the subscriber base, and collaborates closely with both finance and marketing. Their work enables other engineers to deliver a strong experience for subscribers. This is a hybrid role based in San Francisco. On-site presence is required three days per week. What You Will Do Design, build, and maintain backend services for Strava’s subscription and payments platform, working with technologies such as Ruby, Java, Scala, Python, Go, MySQL, Redis, Cassandra, Kafka, Kubernetes, and Docker. Develop and optimize APIs that connect with client applications, improving the subscription and payment journey for athletes. Work closely with product managers, designers, and client-side engineers to ensure technical solutions meet business needs. Help shape the technical direction of payments and subscriptions in partnership with the Engineering Manager. Mentor engineers on the team, encouraging a culture of learning and technical growth. Ensure reliability, scalability, and performance of services, while balancing technical debt with new feature development. What We’re Looking For More than 7 years of professional software development experience. Proficiency in several programming languages, including Ruby, Java, Scala, Python, and Go. Hands-on experience with databases such as MySQL, Redis, Cassandra, and with message brokers like Kafka. Solid understanding of container orchestration and deployment tools, including Kubernetes and Docker. Strong team collaboration skills and a track record of working effectively with others. Experience mentoring junior engineers and leading technical discussions.

About StravaStrava is the ultimate application for individuals who thrive on an active lifestyle. With a community of over 180 million athletes across more than 185 countries, it transcends mere workout tracking; it's a platform where individuals progress together—whether forging new habits or achieving personal records. No matter your activity, Strava is here to support you. Join your community, conquer your objectives, and make every effort matter. Begin your adventure with Strava today.At Strava, our mission is clear: to inspire individuals to lead their most active lives. We understand the transformative power of movement as a connection that propels people forward.About This RoleWe are seeking a skilled Engineering Manager for our Identity team, dedicating approximately half your time to coding and the other half to leadership. In this dual role, you will steer the technical direction of our authentication and authorization systems, supporting our iOS, Android, and web platforms, while also contributing directly to the codebase to enhance quality, speed, and technical sophistication.This role is pivotal at the crossroads of security, platform experience, and user trust. You will be instrumental in building a modern, reliable, and secure identity framework that optimizes login and signup procedures, facilitates abuse prevention, and enhances the overall Strava athlete experience.We adopt a hybrid work model, with more than half of your time spent on-site at our San Francisco office—three days a week.

Strava connects more than 180 million athletes across 185 countries, offering tools for tracking workouts, setting goals, and sharing progress. The platform supports a range of activities, including running, cycling, and swimming, and encourages community and personal growth. Role overview The Staff Engineer, Core Services Platform, will influence the technical direction of Strava’s social platform services. These services support key features such as the activity feed, photo and video sharing, experimentation, and notifications. This role involves guiding a small engineering team and leading modernization efforts across core services. Collaboration with product teams is central to ensuring the platform evolves to support both current and future needs. Work location This position follows a flexible hybrid schedule. In-office attendance is required three days per week at Strava’s San Francisco or Denver offices.

As a Senior Business Analyst at Strava, you will play a crucial role in driving strategic initiatives and enhancing our product offerings. You will collaborate with cross-functional teams to analyze business requirements, develop actionable insights, and support decision-making processes that impact our global community of athletes.

Join Strava as a Senior Product Designer II, where you will be at the forefront of creating exceptional user experiences for athletes worldwide. In this role, you will collaborate closely with product managers, engineers, and fellow designers to bring innovative ideas to life. Your expertise in user-centered design and your passion for sports will help shape the future of our platform.

About StravaStrava is the ultimate app for individuals who embrace an active lifestyle. With a vibrant community of over 180 million athletes spanning more than 185 countries, Strava transcends mere workout tracking—it's a platform where individuals collaborate to achieve their goals, develop new habits, and surpass personal milestones. Regardless of your chosen sport or tracking method, Strava is here to support you. Join us and start crushing your goals today by beginning your journey with Strava.Our mission is straightforward: to inspire individuals to lead their most active lives. We firmly believe in the transformative power of movement to connect and propel people forward.About This RoleAs a key member of the Foundation engineering team at Strava, you will play a crucial role in ensuring the reliability and security of the infrastructure that supports millions of athletes on their journeys. You will develop the tools, frameworks, and platforms that are essential to delivering valuable features to our users.In your role as a Senior Engineer on the Foundation team, you will have the opportunity to enhance Strava's core platform. You will empower teams to innovate swiftly and confidently by enhancing the developer experience, creating tools, collaborating with teams, and ensuring that features are delivered safely and efficiently.We embrace a flexible hybrid work model, which means you will spend over half of your time on-site at our San Francisco office—three days a week.

About StravaStrava is the ultimate app for active individuals, boasting a community of over 180 million athletes across more than 185 countries. It transcends simple workout tracking; it's a platform where athletes progress together, fostering new habits and achieving personal bests. Regardless of your sport or tracking method, Strava is your go-to companion. Connect with your community, achieve your goals, and make every effort count. Start your journey with Strava today.Our mission is clear: to inspire individuals to lead their best active lives. We believe in the transformative power of movement to unite and propel people forward.About This RoleWe are looking for a Senior Android Engineer to join the Subscriptions Team, focused on enhancing Strava’s subscription and checkout experiences. You will develop the Android interfaces that facilitate our transition from free to paid options, including paywalls, purchasing flows, and Google Play Store integrations, impacting millions of athletes worldwide. This role is vital to Strava’s growth and provides significant ownership over highly visible product features.In this position, you will collaborate closely with product, design, analytics, and marketing teams, while also engaging with Strava’s extensive Android community through architecture reviews, code reviews, pair programming, and our active Android guild. Join the team behind the leading fitness app and the 2025 Apple Watch App of the Year as we continue to set standards for Android excellence.We follow a flexible hybrid model, requiring you to be on-site in our San Francisco office for three days a week.What You’ll Do:Lead the Android initiatives on the Subscriptions team, establishing the technical vision and delivering features that impact millions.Drive Strava’s subscription growth through lifecycle experimentation including upsells and checkout enhancements.Maintain and improve our Google Play Billing integration, ensuring critical business processes are stable and reliable.Collaborate closely with product and design teams to deliver polished features in small, focused increments.Mentor fellow engineers through code reviews and pair programming, setting the standard for Android quality across the organization.Leverage the latest AI tools to identify efficient and innovative software development methods.

Join Flux: Revolutionizing Hardware EngineeringAt Flux, we are transforming the landscape of hardware engineering with our pioneering AI Hardware Engineer. Our mission is to empower innovators worldwide to design and build cutting-edge hardware effortlessly.Your RoleAs a Senior Platform Engineer, you will be at the forefront of developing robust systems that enhance the Flux platform. You'll be responsible for crucial functionalities beyond the editor, including billing, authentication, onboarding, and integrations.Your contributions will directly impact every user, ensuring seamless operations and enabling Flux to scale efficiently.Core ResponsibilitiesDevelop and sustain user-centric platform features, such as billing, authentication, onboarding, and settings.Integrate and manage third-party APIs including Stripe, Firebase, and various analytics tools.Create backend services using TypeScript/Node.js and develop frontend components with React.Enhance the reliability and performance of essential platform workflows.Establish standards for observability, logging, and error tracking.Collaborate with cross-functional teams to design APIs that enable new products and integrations.Document architecture and best practices within your domain.

Join Trunkio, where our mission is to enable teams to develop high-quality software swiftly. We have collaborated with engineering teams at top-tier companies like Google X, Zillow, and Brex to identify build failures, manage flaky tests, and enhance code deployment speed without compromising reliability. Although AI has accelerated code writing, the delivery process remains a challenge due to merge conflicts, inconsistent code quality, and other productivity-draining issues. Our goal is to help engineering teams focus on the design, implementation, and delivery of exceptional software, resulting in more fulfilling work experiences. We are currently developing a CI Reliability Platform that empowers teams to deliver code efficiently.Founded in 2021 by industry veterans from Uber, Google, YouTube, and Microsoft, Trunkio has successfully raised a $25M Series A led by Initialized Capital and a16z, with backing from notable investors including Haystack Ventures and the creators of GitHub, Apollo GraphQL, and Algolia.We are seeking a passionate and skilled Senior Software Engineer to join our Platform/Data Engineering team. In this pivotal role, you will design and optimize data ingestion pipelines to manage large volumes of real-time and batch data from diverse sources. Your expertise will be vital in creating systems that are scalable, reliable, and performant, while also ensuring seamless data integration across our ecosystem.

About AbridgeFounded in 2018, Abridge is dedicated to enhancing comprehension in healthcare through innovative technology. Our AI-driven platform is specifically designed for medical conversations, streamlining clinical documentation while allowing clinicians to prioritize what truly matters—their patients.Our cutting-edge technology converts patient-clinician discussions into structured clinical notes in real-time, seamlessly integrating with electronic medical records (EMR). Leveraging Linked Evidence and our unique, verifiable AI, we are the only organization that correlates AI-generated summaries with ground truth, enabling providers to trust and verify outcomes swiftly. As trailblazers in generative AI for healthcare, we are establishing industry standards for the ethical use of AI across health systems.We are a diverse team of practicing MDs, AI experts, PhDs, creatives, technologists, and engineers united in our mission to empower individuals and simplify healthcare. Our offices are located in the vibrant Mission District of San Francisco, SoHo in New York, and East Liberty in Pittsburgh.The RoleAs Abridge expands, we seek skilled Platform Engineers to join our team and enhance our cloud infrastructure and developer experience. You will be a vital member of a centralized Platform team, focusing on platform development, adoption, and ongoing support of existing tools and software. This role is primarily infrastructure-oriented (80%) with a smaller focus on application software (20%).Your responsibilities will include transforming our infrastructure stack to be multi-tenant and multi-cloud, implementing and promoting cloud security practices, managing modular Terraform, and integrating new cloud infrastructure into our production stack for scalability. Additionally, you will develop service templates and various developer tools, including canary releases, feature flagging, load testing, CI/CD pipelines, and more.The platform we are creating aims to enhance both engineering speed and security, accommodating substantial scale while offering numerous opportunities for creativity, autonomy, and leadership in taking projects from inception to completion. This is a unique chance to accelerate your career within a rapidly growing company using the latest technologies.

Agency Notice: We are not currently collaborating with recruiting agencies for this role. We kindly ask that you refrain from contacting Vizcom employees regarding this position. Any resumes submitted without prior agreement will be considered unsolicited.About VizcomVizcom is a cutting-edge visual creation platform that merges advanced web tooling with AI-driven workflows. Our technology stack incorporates React/TypeScript for the front end, Node/Koa + PostGraphile for API services, PostgreSQL, Redis, BullMQ for queuing, and a Kubernetes-based production infrastructure.We are seeking a seasoned expert to oversee platform stability and infrastructure, ensuring our system remains reliable, efficient, and resilient as we scale.Role MissionTake full ownership of service reliability: proactively prevent incidents, minimize impact during failures, and guide swift, high-quality recovery during production downtimes.This role involves hands-on technical leadership, granting you the authority to establish reliability standards and enforce production protocols.CompensationBase salary between $200,000 and $250,000, plus significant equity.Your ResponsibilitiesReliability Standards: Define and uphold SLIs/SLOs/error budgets for key user interactions.Resilience of Production Architecture: Implement failure isolation across APIs, workers, queues, and interdependencies to ensure one subsystem's failure does not disrupt core access.Kubernetes Runtime Reliability: Establish probe contracts, deployment standards, graceful shutdown protocols, scaling/resource policies, and startup safety measures.Queue & Job Safety (BullMQ/Redis): Manage poison pill containment and workload segregation.Incident Command Quality: Lead Sev1/Sev2 incident responses from containment to corrective actions.Reliability Operating System: Oversee observability quality (prioritizing signal over noise), on-call efficiency, runbook maintenance, and postmortem discipline.Deployment Safety Authority: Gate risky deployments and enforce reliability protocols whenever production health is compromised.

About DittoDitto is revolutionizing social connections on college campuses as a leading dating platform. In just three months, we've expanded our user base threefold to over 120,000, backed by a $9.2 million seed round from top-tier investors including Google and prominent venture capital firms. Our mission is to create a product that fosters genuine matchmaking for Gen Z, and we’re only at the beginning of our journey.About the RoleJoin us as we craft an innovative social network powered by AI, where intelligent agents do more than assist — they enhance the entire user experience. We're in search of a passionate Product Engineer Intern who has experience launching consumer products that resonate with users. In this role, you will be responsible for developing user-facing experiences from conception to execution, ensuring they are engaging and seamlessly integrated.Your contributions will be vital in realizing Ditto's matchmaking and engagement engine, bringing to life the experiences that captivate our users while building the infrastructure that makes these interactions feel extraordinary. You will work closely with product managers, researchers, and infrastructure teams to define and refine the core elements of Ditto's platform.In This Role, You WillManage complete product experiences across matching, chat, scheduling, and user re-engagement — from ideation to launch and beyond.Make daily product decisions regarding development priorities, user experience, release timelines, and performance metrics.Design and implement AI-driven product flows where intelligent agents execute tasks while you focus on enhancing the user experience.Develop AI-orchestrated pipelines that automate workflows, replacing manual processes with streamlined solutions.Create internal tools allowing both humans and AI to assess system performance, debug agent activities, evaluate results, and guide system development.Establish feedback mechanisms linking user interactions, agent decisions, and real-world outcomes, including matches, responses, dates, and user retention.Rapidly prototype and iterate based on actual user data, fostering a culture of data-driven decision-making.How You Will WorkYou will function as a product-oriented manager of AI systems. Your role is not solely about coding; it’s about orchestrating the overall user experience through strategic oversight and innovative thinking.

About HyperspellHyperspell is revolutionizing the Memory & Context Layer for AI Agents.AI agents are brilliant yet lack context.While AI agents excel in standardized testing, they struggle with real-world applications. Today's cutting-edge agents lack the contextual understanding that humans naturally acquire through diverse interactions. This context evolves with their tasks.Hyperspell empowers AI agents with contextual awareness by integrating with users' workspace data, creating a tailored memory and context layer.Our ValuesWe are committed to shaping the future through bold innovations. Our goal is to establish ourselves as the indispensable context layer for organizations, enabling all their AI agents to connect seamlessly. We embark on this journey not because it is easy, but because it is significant.We prioritize care — for our customers, their success, the future of AI, and most importantly, for one another. As we build the frontier of AI, we strive to be one of the most technologically advanced yet profoundly human companies in history — a place where we can enjoy shaping the future together.Our InvestorsOur vision is supported by esteemed investors such as Y Combinator, Afore Capital, Scribble Ventures, and Pioneer Fund. Our angel investors include leading figures from OpenAI, Anthropic, xAI, and DeepMind, alongside respected founders from Silicon Valley like Siqi Chen (Runway) and Julian Weisser (On Deck).Our FoundersFounded in 2024 by Conor Brennan-Burke and Manu Ebert, Hyperspell is driven by experienced leaders. Conor previously spearheaded growth at Checkr, overseeing a $30 million API product portfolio and earning the title of 'the most helpful founder in YC'.Manu brings over 15 years of expertise in machine learning and AI, having successfully sold two companies and led high-growth engineering teams at Airbnb. Interestingly, he acquired his first .ai domain in 2014, needing to send a fax to the domain authority in Anguilla to do so.About the RoleAs our founding platform engineer, your mission will be to construct the infrastructure that makes Hyperspell feel magical — swift, dependable, and effortlessly scalable. You will be responsible for the foundation upon which our entire product is built, ensuring that when customers entrust us with their data, we uphold their trust.

About the RoleJoin our dynamic team at allinbits as a Platform Engineer, where your expertise will be vital in designing and maintaining the robust infrastructure that supports our cutting-edge projects. Your role will combine technical acumen with strategic insight, ensuring our development and operational environments are finely tuned for optimal performance, reliability, and scalability.We prioritize experience in our team, especially if you have transitioned from a developer role into DevOps or Site Reliability Engineering (SRE). Your capacity to innovate and construct resilient systems will prove invaluable.In this position, you will utilize tools such as Ansible, Docker, and Hashicorp Nomad to enhance our operations.

About Scribd:At Scribd Inc. (pronounced “scribbed”), our mission is to ignite human curiosity. We invite you to join our team as we craft a landscape rich with stories and knowledge, democratizing the sharing of ideas and information while empowering collective expertise through our suite of products: Everand, Scribd, Slideshare, and Fable.This is an exciting opportunity within our organization, as we support a culture that encourages authenticity and boldness; where thoughtful debate leads to commitment, and where every team member is empowered to take impactful actions focused on customer satisfaction.We embrace a flexible workplace structure that enhances individual adaptability while fostering community connections. Through our Scribd Flex initiative, employees, in collaboration with their managers, can determine a work style that best suits their personal needs. A key aspect of Scribd Flex is our emphasis on intentional in-person moments to nurture collaboration, culture, and connection, making occasional in-office attendance essential for all employees, regardless of their location.What we seek in our new team members is a demonstration of “GRIT.” Defined as the convergence of passion and perseverance toward long-term goals, we are inspired by what this can unlock within our workforce. Each employee is encouraged to adopt a GRIT-focused approach to their responsibilities, which encompasses setting and achieving Goals, delivering Results, contributing Innovative ideas and solutions, and fostering a positive impact on the broader Team through collaboration and attitude.About Our TeamThe Growth Platform team at Scribd is dedicated to empowering marketers, lifecycle teams, and partner channels by providing MarTech solutions that enhance efficiency, data-driven decisions, and scalable user acquisition for our brands including Scribd, Everand, SlideShare, and Fable.Our focus lies in developing and maintaining systems that facilitate campaign execution, optimize landing pages, manage tracking and attribution, and integrate third-party tools for cross-channel marketing and analytics. We prioritize scalability, performance, and reliability, ensuring that our partners are equipped with the necessary tools to drive user growth. Collaboration, pragmatic problem-solving, and a commitment to excellence are the cornerstones of our team's values.