Senior Software Engineer (Backend, AI Platform) at WHOOP | Boston

At WHOOP, our mission is to enhance human performance and extend healthspan. We empower our members to optimize their performance and longevity through profound insights into their bodies and daily routines. A critical aspect of our mission is safeguarding our members' data while ensuring our systems scale securely and reliably. We are seeking a talented Software Engineer II specializing in backend development to build and refine the systems that fuel our platform. This pivotal role will play a direct part in delivering scalable and secure services that support millions of members globally. While backend development expertise is essential, familiarity with cybersecurity principles (such as data privacy, authentication, and authorization) or cloud infrastructure concepts (including AWS, Infrastructure as Code, and Kubernetes) will be highly regarded. This position offers a unique opportunity to align with either our Product Security team, focused on security compliance and data privacy, or our Application Infrastructure team, which emphasizes scalability, reliability, and developer support. In either capacity, you will help shape core platform practices and contribute to WHOOP's growth trajectory.

About SimpliSafe SimpliSafe is a pioneering home security technology company dedicated to safeguarding your home and the life you've built. We are on a mission to ensure Every Home is Secure, and we foster a culture that equally values your career development. Join us in a collaborative, innovative environment where egos are left at the door and growth opportunities abound. We’re not just looking for employees; we want you to flourish and make a significant impact in the lives of those we protect. We embrace a hybrid work model, allowing our teams to balance their time between the office and their homes. This means we expect our team members to come together in our cutting-edge office on two core days of the week—typically Tuesday, Wednesday, or Thursday—while enjoying flexibility for the remaining days. Why are we hiring? As we continue to expand, we are in search of intelligent, skilled, and humble individuals who resonate with our values. Join us as we disrupt the home security industry and relentlessly pursue our mission of ensuring Every Home is Secure. Your Role As a Software Engineer II on the Video team at SimpliSafe, you will play a crucial role in developing and maintaining our cloud-based systems that facilitate live streaming and video recording for SimpliSafe cameras. Your expertise will support backend microservices responsible for ingesting, processing, storing, and delivering real-time video to customers, monitoring agents, and machine learning systems. In this safety-critical domain, reliability, performance, and simplicity are paramount. You will collaborate closely with fellow engineers, product managers, and partner teams to design, implement, and enhance services that provide customers with confidence and visibility into their homes. Key Responsibilities Design, develop, and maintain backend services that enable live video streaming and recording at scale. Write clean, reliable, and thoroughly tested code using contemporary development tools and practices, with an emphasis on maintainability and long-term ownership. Enhance system reliability, performance, and observability through thoughtful design and iterative improvements. Collaborate with senior engineers to adopt best practices for designing and operating distributed systems. Engage in operational responsibilities, including on-call duties, incident response, and post-incident analysis. Participate in design discussions and contribute to the technical direction of the team. Document systems and processes to ensure knowledge sharing and continuous improvement.

At WHOOP, we are dedicated to revolutionizing human performance and extending healthspan. Our mission is to empower individuals to reach their optimal potential by providing comprehensive insights into their physiological well-being through our cutting-edge wearable technology. By continuously monitoring vital metrics, we deliver personalized recommendations that enhance fitness, health, and recovery.The Growth Team at WHOOP embodies a dynamic, fast-paced, and experimentation-focused environment. Our primary objective is to drive user acquisition, activation, and retention through a data-driven approach. We rigorously evaluate the performance of our features and iterate based on quantifiable results.As a Software Engineer II on the Growth Team, you will play a pivotal role in developing features that significantly influence our business metrics and member growth. Your collaboration with cross-functional teams will be essential in designing, measuring, and refining high-impact mobile experiences that resonate with our users.

At WHOOP, we are dedicated to revolutionizing human performance and extending healthspan. By empowering our members with a profound understanding of their bodies and daily activities, WHOOP enables individuals to achieve their peak potential.We are seeking a talented Software Engineer II to become an integral part of our Business Systems team. In this pivotal role, you will be responsible for designing and implementing robust backend systems that drive WHOOP's internal operations, fostering scalability and efficiency throughout the organization. You will architect and maintain essential services and integrations that support various functions, including Finance, Operations, and Member Services. By developing reliable, secure, and high-performance systems, you will have a direct impact on how WHOOP delivers unparalleled value to our members and scales on a global level.

WHOOP helps people understand their bodies and improve their health. Our platform supports members in reaching their goals by giving them deeper insight into daily performance and well-being. About the Role The Software Engineer II (Backend, Health Records) will focus on building systems that securely handle and process health data. This work supports the integration of external healthcare sources with WHOOP’s platform, making it possible to turn complex records into useful, actionable information. What You’ll Do Develop and maintain backend systems for health data ingestion and processing Ensure solutions are secure and scalable Help connect external healthcare ecosystems to WHOOP’s platform Transform raw health records into insights that support personalized health experiences Contribute to projects that expand WHOOP’s ability to deliver long-term value to members Location This role is based in Boston, MA.

Role overview This Backend Software Engineer II position at Whoop focuses on hardware acceleration. The work centers on building backend systems that support health and fitness tracking products. Scalability and efficiency are key priorities for these systems. What you will do Develop and maintain backend services that use hardware acceleration to boost platform performance Collaborate with other engineering teams to support both new and existing health and fitness tracking features Help ensure core backend services remain reliable and scalable Location This position is based in Boston, MA.

Role Overview Whoop, Inc. is hiring a Software Engineer II focused on frontend development for its AI Platform in Boston, MA. This position centers on building and improving user interfaces that support the company’s fitness technology products. What You Will Do Work with teams across engineering, design, and product to deliver polished, intuitive user interfaces Contribute to the design and implementation of features that expand the platform’s capabilities Help shape the user experience for tools that support Whoop’s mission to unlock human performance What We’re Looking For Experience with modern frontend technologies Interest in building high-quality, engaging user experiences Strong collaboration skills and the ability to work with cross-functional teams This role is based in Boston, MA.

At WHOOP, our mission is to revolutionize human performance and enhance healthspan. We empower our users to achieve peak performance by providing them with profound insights into their bodies and daily activities. Our cutting-edge wearable technology meticulously tracks vital physiological metrics, including heart rate variability, resting heart rate, and sleep quality, delivering personalized insights that optimize fitness, health, and recovery.As a Backend Software Engineer II specializing in AI Experiences, you will harness WHOOP's state-of-the-art generative AI capabilities to design, develop, and maintain engaging member-facing features that significantly improve health outcomes. You will be an integral part of a collaborative team, working alongside seasoned engineers, designers, and product managers to empower our members in understanding their health, enhancing their performance, and navigating their WHOOP journey with clarity.

At WHOOP, our mission is to enhance human performance and extend healthspan through innovative technology. We empower our users to achieve peak performance by providing them with deep insights into their bodies and daily routines. Our cutting-edge wearable device meticulously tracks essential physiological metrics like heart rate variability, resting heart rate, and sleep quality, delivering personalized insights that help users optimize their fitness, health, and recovery.We are seeking a Software Engineer II to join our Healthcare Infra team. In this role, you will play a critical part in developing and maintaining dynamic features within the healthcare domain, linking our members to advanced data science algorithms. Your expertise will be pivotal in creating reusable and scalable platforms that accelerate the Healthcare organization’s ability to innovate in the fast-paced consumer health landscape. Collaborating with both internal and external partners, you will enhance our members' understanding of their holistic health—spanning physical, mental, emotional, and hormonal dimensions—by building the foundational infrastructure that connects them with a broader healthcare ecosystem.This position is ideal for a backend engineer who is passionate about crafting scalable systems, eager to confront high-impact challenges, and dedicated to delivering user-centric solutions that truly meet our members' needs.

Role overview Speechify seeks a Software Engineer to join the Platform team based in Boston, MA. The team’s work underpins the company’s goal of making reading accessible, focusing on software that can handle growth and evolving user needs. What you will do Collaborate with engineering, product, and design colleagues to deliver dependable platform features Design, build, and maintain software solutions that support a growing user base Participate in projects that improve the overall user experience

Role Overview Whoop is hiring a Software Engineering Manager to lead the Translations Platform team in Boston, MA. This manager will guide a group of engineers focused on improving and expanding the company’s translation technology. The team’s work supports products used by millions around the world. What You Will Do Oversee engineering projects that enhance Whoop’s translation capabilities Mentor and support a team of engineers, helping them grow and deliver strong results Promote a culture of collaboration and continuous improvement within the team Shape the direction of translation technology across Whoop’s products Impact Your leadership will help drive innovation in Whoop’s translation platform, making a direct impact on the experience of users worldwide.

Join our innovative team at Lever as a Backend Engineer, where you will play a pivotal role in crafting cutting-edge software solutions that transform the hiring landscape.At Lever, we are dedicated to revolutionizing the way companies recruit top talent. Our software is trusted by industry leaders like Netflix, Yelp, Cirque du Soleil, Shopify, and Spotify. As we continue to grow, we seek talented individuals who are passionate about redefining talent acquisition.We are proud to be recognized as the #1 workplace in San Francisco and a top employer in the United States. Our team, known as “Leveroos,” is our greatest asset, and we are committed to fostering a people-first culture that celebrates collaboration and innovation.

Acadian Asset Management is a pioneering global systematic investment manager, leading the charge in data-driven investing since 1986. With our headquarters in Boston and offices in Singapore, London, and Sydney, we oversee more than $170 billion for esteemed institutions worldwide, including pension funds, endowments, foundations, and sovereign wealth funds. Our approach utilizes cutting-edge technology, extensive datasets, and interdisciplinary expertise to guide clients through complex markets and reveal insights that traditional methods may overlook.What truly differentiates Acadian is our team. We cultivate a collaborative and intellectually curious workplace where ideas are challenged, diverse perspectives are valued, and innovation flourishes. United by a common goal, we are committed to delivering exceptional client outcomes while supporting each other in work that is both demanding and fulfilling. Our flexible hybrid work environment, comprehensive benefits, and a casual yet focused office culture are designed to foster the meaningful, collaborative work that defines Acadian.Position Overview:The Platform team plays a crucial role in developing and maintaining services that empower our development teams to utilize frameworks, tools, and services across in-house and vendor PaaS/IaaS platforms. This team defines the architectural roadmap, establishes best practices, and provides training on these services. In this role, you will collaborate with a cross-functional team responsible for implementing and managing our investment infrastructure, concentrating on creating reusable application templates, delivery patterns, and operational support for our systems deployed on AWS and Kubernetes.

At Klaviyo, we celebrate the diverse backgrounds, experiences, and perspectives that each team member—the Klaviyos—brings to our dynamic workplace. We believe that everyone deserves an equitable opportunity to succeed, and we value the unique experiences that go beyond conventional job requirements. If you find that you closely align with our expectations, we encourage you to apply! Curious about life at Klaviyo? Discover how we empower creators to shape their own futures at klaviyo.com/careers.Why Join Our Email Platforms Team?The Email Platforms team at Klaviyo is at the forefront of developing cutting-edge infrastructure to ensure reliable, scalable, and high-performance email delivery. Our mission is to propel Klaviyo to enterprise-scale by evolving and owning our email sending pipeline comprehensively. We are heavily investing in our proprietary email delivery infrastructure, granting us enhanced control, performance, and reliability in serving some of the world's largest brands.As a member of this high-impact team, you will tackle significant technical challenges related to high-throughput systems, distributed messaging, and service performance at scale. Your work will play a crucial role in enhancing customer satisfaction and driving business success. If you are passionate about email infrastructure, systems design, and high-scale backend development using Go, this opportunity is perfect for you.Your Impact:Lead and own key components of the email pipeline architecture.Design and implement scalable, high-throughput services using Go.Create systems to manage message queues and oversee email delivery.Ensure our systems scale seamlessly with customer growth, particularly as we onboard larger enterprise accounts.Collaborate across departments to uphold the highest standards of performance, reliability, and deliverability.Revolutionize workflows by integrating AI, building smarter systems and processes from the ground up.Your Profile:Senior-level backend engineer with a strong foundation in systems design.Expertise in Go (mandatory); experience with Python is a plus.

Join Klaviyo as a Software Engineer II on our Flows Platform team! As a key contributor, you will help design and implement scalable solutions that enhance the user experience and streamline workflows. This is an exciting opportunity to be part of a dynamic team that values innovation and collaboration.

At Toast, we are passionate about creating a revolutionary restaurant platform that empowers restaurants to reclaim their passion and focus on what they do best: nurturing their beloved businesses. We pride ourselves on being an unconventional tech company that thrives on innovation. Challenging the status quo is embedded in our culture. Building a transformative product necessitates forward-thinking, which is why we deeply value diverse backgrounds and experiences. Our mission is to enable restaurants of all sizes to assemble exceptional teams, boost revenue, streamline operations, and offer unforgettable guest experiences. By combining our extensive knowledge of the restaurant industry with robust cloud-based software and top-tier hardware, we deliver an intuitive all-in-one solution. Join us in our quest to uplift the restaurant community, delight guests, and help them flourish. Our Fintech division at Toast plays a pivotal role in our infrastructure by managing payments for restaurants and ensuring timely transactions. Payment processing is not only a vital revenue stream for Toast but also essential for our customers, as we handle millions of dollars in transactions daily. We are on the lookout for a Senior Software Engineer to enhance our Payments team and develop our unified payment processing platform. This solution provides a seamless, integrated service for accepting payments across various channels and supports a configurable enterprise approach. It is engineered to enable a build-once, available-to-all strategy for both existing and emerging payment methods. The right candidate will play a crucial role in creating services that provide essential support and functionality within this payment processing framework.

At WHOOP, we are dedicated to empowering individuals to enhance their performance and extend their healthspan. As a Senior Software Engineer on our Business Systems team, you will be instrumental in designing and implementing robust backend systems that drive WHOOP’s internal operations. Your efforts will facilitate scalability and operational efficiency across various departments, including Finance, Operations, and Member Services. By architecting and maintaining critical services and integrations, you will play a crucial role in ensuring that our systems are reliable, secure, and high-performing, ultimately helping WHOOP deliver exceptional value to our members and support our global growth ambitions.

At WHOOP, we are dedicated to transforming human performance and enhancing healthspan. Our mission is to empower members to achieve peak performance through a profound understanding of their bodies and daily lives. With our cutting-edge wearable technology, we monitor essential physiological metrics to provide tailored insights that boost fitness, health, and recovery.The Growth Team at WHOOP is a dynamic, results-oriented group committed to driving user acquisition, activation, and retention. Our data-centric approach enables us to continuously assess the effectiveness of our features and iterate based on those insights.As a Senior Backend Software Engineer, you will be instrumental in constructing backend services that significantly influence our business metrics and foster member growth. Collaborating cross-functionally, you will deliver impactful features and contribute to architectural decisions, ensuring WHOOP's scalability to millions of members.

Axiomatic AI offers a Software Engineering Internship focused on Platform and DevOps. This position is available in Boston, US or Castelldefels (Barcelona), Spain. Role overview Interns will join experienced engineers to support platform reliability and efficiency. The work centers on refining development workflows and deployment processes. Projects often involve applying artificial intelligence to practical challenges. What you will do Collaborate with engineers to enhance platform performance Assist in improving development and deployment pipelines Contribute to initiatives that use AI in real-world applications Internship experience Direct involvement with current platform and DevOps methods Insight into active AI projects Work closely with a knowledgeable engineering team