Server Engineer, Communication & Experimentation

About StravaStrava is the premier app for active individuals, boasting a community of over 180 million athletes across more than 185 countries. It's not just about tracking workouts; it's a platform where users can collaborate, share progress, and celebrate achievements. Whether you're into running, cycling, or any sport, Strava provides the tools you need to find your community, achieve your goals, and maximize your efforts. Embark on your journey with Strava today.Our core mission is to inspire individuals to lead their most active lives. We believe that movement fosters connection and propels people forward.Strava is seeking a Server Engineer to join our newly established Comms and Experimentation Platform team within our Horizontal Engineering division. This is an exciting opportunity to be a foundational team member, collaborating with senior engineers to develop scalable platform capabilities that enhance how Strava engages with its athletes.This position is based in our San Francisco office and follows a hybrid work model, promoting in-person collaboration at least three days a week while providing flexibility for remote work.

Join Checkr as an Engineering Manager for Growth & Experimentation, where you will spearhead innovative initiatives to enhance our platform and drive continuous improvement. You will lead a talented team of engineers, guiding them through experimentation and scaling efforts that directly impact user growth and engagement.Your expertise will play a crucial role in shaping our technical strategy and ensuring successful execution of projects that align with Checkr's mission of making hiring more equitable and efficient.

Superhuman offers a hybrid work model for this role. Team members combine focused individual work with in-person collaboration that supports trust, creativity, and a strong team culture. Work from our offices in San Francisco, Seattle, or New York City as you prefer. About Superhuman Superhuman is an AI productivity platform designed to help people reach their full potential. Our suite of applications and agents, including Grammarly's writing tools, integrates with over one million apps and websites. The platform features collaborative workspaces (Coda), efficient inbox management (Mail), and Go, an AI assistant that provides contextual help automatically. Since 2009, Superhuman has supported over 40 million individuals, 50,000 organizations, and 3,000 educational institutions worldwide to cut down on busywork and focus on what matters. Learn more at superhuman.com and see our values here. Role Overview: Software Engineer - Experimentation Superhuman is hiring a back-end-focused Software Engineer for the Experimentation team. This engineer will help build and maintain core components of our product suite, infrastructure, and features that improve writing clarity and effectiveness for millions of users. The work includes designing and maintaining experimentation frameworks and internal tools that shape our product roadmap and support company growth. Engineers and researchers at Superhuman have the freedom to innovate and drive breakthroughs, directly influencing product direction. As we expand our interfaces, algorithms, and infrastructure, technical challenges are becoming more complex and interesting. Superhuman is growing quickly. This is a chance to join a talented team, learn from experienced colleagues, and help build impactful products and teams from the ground up. Within our engineering group, there are real opportunities for ownership and direct impact on user experience. What You Will Do Enhance and evolve experimentation infrastructure to support the development of new AI products and workflows.

Join Lyft as a Software Engineer specializing in server-side development. In this role, you will work on building scalable and efficient backend systems to enhance our ride-sharing platform. Collaborate with cross-functional teams to deliver innovative solutions that improve user experience and optimize operational efficiency. Your expertise in software development will help us meet the growing demands of our users.

Anthropic is looking for a Staff Engineer to join the Datacenter Server Lifecycle team. This position centers on designing, building, and maintaining the server systems that form the backbone of Anthropic's data center operations. Role overview This engineer will play a key part in shaping the infrastructure that powers Anthropic's AI systems. The work involves both planning new server deployments and ensuring existing systems continue to run reliably. What you will do Design and implement server solutions for core data center functions Maintain and improve server systems to support ongoing operations Directly contribute to the infrastructure supporting Anthropic's AI technology Location This role is based in San Francisco, CA or New York City, NY.

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 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.

Role overview The Senior AI Community Engineer at Deepgram, Inc. works from San Francisco, CA and focuses on building connections among AI developers and enthusiasts. This position blends technical knowledge with community-building efforts, encouraging collaboration and fresh ideas within the AI space. What you will do Create content that helps community members learn and connect Host events that bring developers and AI enthusiasts together Provide technical support to members of the community Requirements Experience working with artificial intelligence Background in community engagement or developer relations Strong communication and collaboration skills

About BuildkiteAt Buildkite, we strive to empower developers worldwide by reinventing software delivery. Our platform is designed to be fast, reliable, secure, and scalable, serving high-growth tech companies such as Airbnb, Canva, Shopify, PagerDuty, and Lyft.Job OverviewWe are seeking a Senior Community Engineer to cultivate the Buildkite community, leveraging customer trust and enthusiasm to foster technical distribution and establish credibility through authentic engagement. This role is a technical ambassador for Buildkite, representing us online, within the ecosystem, and in-person in the Bay Area. Your mission is to instill a profound sense of confidence in developers that Buildkite is not just a tool, but a serious, culturally unique solution crafted by builders for builders.Your responsibilities will include creating and delivering tangible prototypes, actively participating in key conversations with insightful contributions, transforming customer experiences into compelling narratives, and nurturing a sense of community belonging. Your success will be measured by the trust you build within the community. We are committed to maintaining high standards and will only consider candidates with a strong engineering background, deep familiarity with development tools, and a record of community engagement. What You’ll DoBe an Aspiring EngineerDeliver production-grade reference implementations that exemplify excellence with Buildkite.Develop and sustain tools and plugins that address real challenges and elevate the ecosystem.Maintain public artifacts with diligence: versioned, documented, tested, and cared for.Foster the Buildkite CommunityPresent the unique Buildkite perspective on CI, development workflows, reliability, craftsmanship, and future directions.Create engaging experiences that breathe life into Buildkite, including sandboxes, customer stories, impactful posts, insights backed by evidence, walkthroughs, behind-the-scenes builds, live demonstrations, and community rituals that resonate with developers.Consistently and visibly represent Buildkite; you are a vital part of our brand. Be comfortable being recognized, quoted, and occasionally corrected in public.

Astranis builds satellites for high orbits, delivering secure communication networks to enterprises, government agencies, and the U.S. military. With five satellites already in orbit and a strong backlog of commercial contracts, the company continues to expand its reach. Astranis operates from a 153,000 sq. ft. headquarters in Northern California, where a team of 450 engineers and entrepreneurs design, build, and manage advanced satellite systems. The company is supported by over $750 million in funding from major investors. Internship Overview The Communications and DSP Engineering Intern position for Fall 2026 is a 12-week program based in San Francisco. This internship is intended for students currently enrolled in a four-year university. Interns work on real projects from the start, contributing to both hardware and software used in Astranis satellite missions. Many previous interns have gone on to join the company full-time after their internships. What You Will Do Design and implement signal processing algorithms for custom software-defined radio hardware, including tasks like channelization, equalization, and gain control. Work closely with FPGA developers to integrate and test signal processing functions on radio hardware. Model end-to-end radio systems to support communication between Earth and space. Perform radio architecture trade studies, optimize system performance, and manage link budgets for a range of global applications.

Join the vibrant team at Laurel Court, where we pride ourselves on delivering exceptional dining experiences. As a Server, you'll play a crucial role in creating memorable moments for our guests through outstanding service and attention to detail. Your responsibilities will include taking orders, serving food and beverages, and ensuring customer satisfaction in a fast-paced, upscale environment.

Join Our Innovative Applied AI Lab!At Cognition, we are pioneering the future of technology by developing end-to-end software agents.We are the creators of Devin, the world's first AI software engineer, and Windsurf, an AI-native integrated development environment. Our vision is to create collaborative AI teammates that allow engineers to tackle more fascinating challenges and empower teams to achieve their most ambitious goals.Our compact and highly skilled team includes accomplished competitive programmers, former entrepreneurs, and industry leaders from top-tier AI companies such as Scale AI, Palantir, Cursor, Waymo, Tesla, Lunchclub, Modal, Google DeepMind, and Nuro.While building Devin and Windsurf is a significant milestone, our most challenging and exciting tasks lie ahead. If you're passionate about addressing some of the world's most pressing issues and want to create AI that can reason through real-world tasks, we invite you to apply.About the RoleAs the Developer Community Manager, you will spearhead the development of a vibrant community around Devin, reshaping how developers work. You will serve as the vital link between Cognition and the wider developer ecosystem by organizing events, nurturing advocates, and introducing Devin to universities and developer communities globally.This is not your typical community manager position. We seek an individual with substantial technical expertise—ideally a developer or engineer—who can authentically engage with software engineers, demonstrate Devin and Windsurf in practical workflows, and design initiatives that resonate with a deeply technical audience. You'll be responsible for crafting and executing our community programs from the ground up, creating something entirely new at Cognition.This role is perfect for someone who thrives at the intersection of engineering and community engagement.Core ResponsibilitiesExpand Cognition's developer ambassador program by recruiting, onboarding, and supporting technical advocates who promote Devin in their communities.Organize and execute developer events such as hackathons, meetups, demo days, and conference activations to showcase Devin's capabilities to engineering audiences.Develop and manage university programs, including campus ambassador networks, workshop series, and collaborations with computer science departments and student engineering organizations.Produce engaging technical content and resources, including tutorials, demo scripts, and workshop materials to assist developers in understanding and adopting Devin.

Join Twitch as a Software Engineer I focused on Community Growth, where you'll have the opportunity to develop innovative solutions that enhance user engagement and foster community connections on our platform. You will work closely with cross-functional teams to implement features that improve the overall user experience.

Astranis builds advanced satellites for high orbits, supporting secure and reliable communications for clients ranging from large corporations to government agencies and the US military. With five satellites already in orbit and a growing backlog of commercial contracts, the company continues to expand its presence in the satellite communications field. Astranis operates from a 153,000 sq. ft. headquarters in Northern California and is backed by over $750 million from investors including Andreessen Horowitz, Blackrock, and Fidelity. Role overview The Communications/DSP Associate Engineer position is a twelve-week, salaried role designed for recent graduates of four-year universities. Associates work on meaningful projects, often designing and testing both hardware and software for satellites. Many associates have gone on to accept full-time positions at Astranis. Candidates who have not yet graduated from a four-year university are encouraged to consider the Internship program instead. What you will do Design signal processing algorithms for custom software-defined radio hardware, including tasks such as channelization, equalization, PA linearization, gain control, carrier synchronization, symbol mapping, framing, and channel coding/FEC. Work closely with FPGA developers to implement and validate signal processing on radio hardware. Model the full radio system, covering communication from Earth to space and back. Perform radio architecture trade studies, complete link budgets, and optimize radio systems for performance across different global markets and applications.

Astranis is at the forefront of space technology, developing cutting-edge satellites designed for high orbits to extend humanity’s presence within our solar system. Our satellites deliver dedicated, secure networks to a diverse clientele, including large enterprises, sovereign governments, and the US military. With five satellites already in orbit and numerous launches on the horizon, we are addressing a substantial backlog of over $1 billion in commercial contracts.Astranis is the trusted satellite communications partner for clients who demand excellence in uptime, data security, network visibility, and bespoke solutions. Having secured over $750 million in funding from prominent investors such as Andreessen Horowitz, Blackrock, and Fidelity, we are proud to employ a dynamic team of 450 engineers and entrepreneurs at our impressive 153,000 sq. ft. headquarters in Northern California.RF/Communication Systems EngineerIn this role, you will take charge of the architecture, design, and modeling of our satellite communication payloads. Collaboration will be key as you work alongside teams including antenna, SDR, RF, DSP, and mechanical engineers to develop optimal radio systems.Conduct architectural trade studies and analytically or via simulation define system and unit-level requirements.Lead R&D initiatives for innovative radio features, technologies, and custom components.Engage with multiple design teams, including RF, antenna, digital hardware, FPGA, mechanical, and thermal.Design and test communications-related signal processing algorithms.Support recruitment efforts by interviewing and onboarding new team members to our rapidly expanding team.

Senior Software Engineer – Cloud Communications Platform Location: South San Francisco, California, USA About Zipline Are you passionate about making a difference in the world? At Zipline, we are dedicated to revolutionizing the movement of goods globally. Our mission is to tackle the world’s most pressing access challenges by developing the first instant delivery and logistics system that serves all individuals, irrespective of their location. From facilitating Rwanda’s national blood delivery network and distributing COVID-19 vaccines in Ghana to offering on-demand home delivery for major retailers and enabling healthcare providers to deliver care directly to homes in the U.S., we are reshaping logistics for businesses, governments, and consumers alike. While our technology is sophisticated, the concept is straightforward: a teleportation service that delivers what you need, when you need it. By utilizing robotics and autonomy, we are committed to decarbonizing delivery, alleviating road congestion, minimizing fossil fuel usage, and enhancing the resilience of the global supply chain. Join Zipline and contribute to creating an equitable and resilient logistics system that impacts billions of lives. About You and The Role Zipline operates a large-scale autonomous system that relies on dependable, low-latency communication between vehicles, ground infrastructure, and cloud services. Our Cloud Communications team is responsible for the platform that transfers critical data from embedded systems to the cloud, ensuring data reliability, scalability, and observability. We seek a Senior Software Engineer to enhance and fortify this platform. This role centers on connecting hardware assets to the cloud, hosting and orchestrating new data use cases, and constructing distributed observability across embedded software, cellular networks, and cloud microservices. In this position, you will collaborate closely with the Embedded and Autonomy teams that develop software to extract data from devices. Your primary responsibility will be to guarantee that data is securely ingested into the cloud, deduplicated, stored, processed, monitored, and accessible for both real-time and offline workflows. This is a high-ownership role directly influencing flight reliability, operational visibility, and the scalability of our global network. What You’ll Do Lead the evolution of services connecting vehicles, charging and loading stations, fulfillment hardware, and other field-deployed infrastructure to the cloud. Design and maintain asset-to-cloud APIs, message schemas, and communication clients in collaboration with embedded teams. Develop and manage ingestion pipelines for new data use cases.

About the TeamJoin the innovative Workload Networking team at OpenAI, where we develop cutting-edge collective communication frameworks that power our most extensive training initiatives. Our team leverages advanced C++ and CUDA technologies to explore pioneering collective communication strategies, maximizing the efficiency of our flagship models on custom-built supercomputers.The models we create are vital to the advancement of AI research at OpenAI and across the industry. We continuously integrate insights from our diverse research community into our training architecture.About the RoleAs a Software Engineer specializing in Networking, you will play a crucial role in designing and implementing tailored networking collectives that are seamlessly integrated into our training pipeline.We seek candidates with a solid foundation in performance-critical low-level software development. Familiarity with collective communication principles is a valuable asset.This position is located in San Francisco, CA, and follows a hybrid work model, requiring three days in the office per week, with relocation support available for new hires.Your Responsibilities Include:Collaborating with ML researchers to design and implement high-performance collective operations in C++ and CUDA.Optimizing our extensive training jobs to fully leverage various network transport technologies utilized in our supercomputers.Conducting simulations to guide the design of future supercomputer networks.Ideal Candidates Will:Have experience developing distributed algorithms utilizing RDMA.Be proficient in writing low-level, performance-sensitive code for CPUs and/or GPUs.Possess knowledge of network simulation methodologies.About OpenAIOpenAI is at the forefront of AI research and deployment, dedicated to ensuring that general-purpose artificial intelligence is a benefit to all of humanity. We challenge the limits of AI capabilities and strive to deploy these technologies safely through our innovative products. Our mission is rooted in creating AI responsibly, with a focus on safety and the diverse needs of humanity. We value varied perspectives and experiences to enrich our endeavors.We are proud to be an equal opportunity employer, committed to inclusivity and diversity in the workplace.

Exciting OpportunityBecome a pivotal member of a team that is transforming the way we engage with our members. Our Proactive Communications initiatives are essential for enhancing member engagement and improving health outcomes, as we move beyond standard notifications to create engaging interactions that support members on their recovery journey.In this position, you will develop the intelligence and infrastructure needed to communicate with our members at optimal times, delivering the right message through the most effective channels. As a Staff Engineer, you will spearhead the technical architecture of our unified communications platform, working alongside Machine Learning Scientists to coordinate outreach via SMS, email, in-app notifications, and nudges, utilizing proprietary data and predictive models.Your Key ContributionsDesign the Communications Engine: Direct the architecture and scaling of a unified communications platform that facilitates member outreach across various channels (SMS, email, push notifications, in-app) with exceptional throughput and minimal latency.Lead Technical Strategy: Establish and navigate the long-term technical roadmap for proactive outreach in collaboration with product and engineering leadership, balancing immediate implementation with the adaptability needed for future capabilities like Conversational AI.Implement Intelligent Interventions: Collaborate with ML scientists to design systems that incorporate proprietary models into communication workflows, ensuring outreach is motivated by predictive member behaviors and requirements rather than fixed rules.Guarantee System Reliability & Scalability: Enhance system performance to assure the reliability and delivery of messages to members, upholding rigorous standards for observability, error management, and member privacy.Advance Engineering Practices: Establish and refine best practices for CI/CD, automated testing, and monitoring for both software services and ML model performance in production.Foster Mentorship & Collaboration: Mentor senior and intermediate engineers, nurturing a culture of technical excellence. Build strong cross-functional partnerships across Product, Design, Marketing, and Data Science.Who You AreA Technical Visionary: You thrive in ambiguous situations and can translate complex business objectives into scalable, long-term technical architectures.A Continuous Learner: You have a deep passion for distributed systems and ML integration, consistently exploring innovative methods to apply your knowledge.

Join Mindlance as a Communication Designer specializing in Visual Communications. In this dynamic role, you will harness your creativity to develop compelling visual content that resonates with our audience. You will work closely with cross-functional teams to ensure our messaging is clear, engaging, and aligns with our brand's vision.