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

At WHOOP, we are driven by a commitment to enhancing human performance and extending healthspan. Our platform empowers a wide range of members, from Olympians and professional athletes to fitness enthusiasts, enabling them to achieve their peak potential by gaining profound insights into their bodies and daily lives. We are eager to welcome highly skilled an…

At Klaviyo, we celebrate the diverse backgrounds, experiences, and perspectives that each of our team members, whom we affectionately refer to as Klaviyos, brings to our collaborative environment. We believe in providing everyone an equitable opportunity for success and value the unique experiences that extend beyond conventional job qualifications. If you find yourself slightly differing from the outlined requirements, we encourage you to apply. Curious about life at Klaviyo? Explore more at klaviyo.com/careers to discover how we empower creators to take charge of their destinies.Klaviyo is on a rapid growth trajectory with positions available for various skill levels across all teams. For insights into our engineering culture, visit https://klaviyo.tech.We thrive on solving complex engineering challenges and seek Engineers who, while specializing in specific fields, are passionate about building, owning, and scaling features from inception to deployment, overcoming any obstacles in their path. We motivate each other to step out of our comfort zones, embrace new technologies, and continuously strive for improvement.Klaviyo operates a real-time data platform developed in Python, designed for massive scalability on Amazon Web Services (AWS). Our Engineers come from a wide array of programming backgrounds and disciplines.Team Overview:The Developer Experience (DevX) team is a dynamic, hybrid product-platform group dedicated to empowering external developers and partners by enhancing the applications they create utilizing Klaviyo’s Public APIs and features. Key areas of responsibility include:Managing our Application directory, which facilitates Klaviyo customers in discovering applications available for activation.Overseeing the self-service application process for partners to submit their applications, and enabling Klaviyo staff to review and approve submissions.Developing API Analytics, a system that assists developers and partners in diagnosing application issues and understanding their API utilization, powered by a near real-time data pipeline processing over 160,000 events per second.Generating autogenerated API documentation, SDKs, CLIs, and MCP servers.Responsibilities:...

Become a Force for Good at Axon.At Axon, we are dedicated to our mission of Protecting Life. Our team is composed of innovative thinkers tackling the most pressing safety and justice challenges through a comprehensive suite of devices and cloud-based software. We value collaboration and strive to connect with honesty and empathy, embracing diverse perspectives from our customers, communities, and each other.Working at Axon is an exhilarating, challenging, and meaningful experience. You will have the opportunity to take initiative and influence real change. As you contribute to a mission that truly matters, you will also have the chance to grow and develop within a company that values your contributions.Your ImpactAs a Senior Software Engineer on Axon’s Robotics team, you will play a pivotal role in revolutionizing the deployment of advanced robotic systems by law enforcement and military agencies. Collaborating with a skilled and dynamic team, you will focus on developing the Android-based software application for Axon’s Ground Control Station (GCS), facilitating operator interaction with advanced ground and aerial robots. Tackling complex challenges, you will deliver simple yet effective solutions that directly impact lives. You’ll be responsible for architecting and leading essential software features related to robotic command and control, artificial intelligence, video streaming, and data management.Your role will involve working closely with a diverse group of engineers, product innovators, and designers to advance mobile robotics software and provide an exceptional solution to our customers. If you are passionate about Android development, enjoy solving intricate technical challenges, and aspire to contribute to a product that enhances public safety, we invite you to join our team. Help us create a platform that significantly impacts the protection of life, truth, and justice.

About the Role Whoop is looking for a Software Engineer I with a focus on Quality Assurance. This entry-level position supports the reliability of our product and helps improve the experience for our users. The role centers on maintaining and raising the standard of our software quality.

About SimpliSafe At SimpliSafe, we are at the forefront of high-tech home security, driven by our mission to safeguard every home. We have cultivated a culture that not only cherishes the safety of our clients but also values the career development of our team members. In our no-ego environment, collaboration and innovation thrive, creating ample opportunities for those ready to face new challenges and make a significant impact on the lives we protect. We don’t just want you to work here; we want you to flourish. Our hybrid work model allows our teams to balance office and home working seamlessly. Expect to collaborate in our state-of-the-art Boston office on two core days—typically Tuesday, Wednesday, or Thursday—while enjoying the flexibility to choose your workspace for the remaining days. This approach allows us to harness the benefits of both environments to optimize productivity. Why We Are Hiring We are expanding our Tools and Automation organization, specifically within the Test Platform Services (TPS) team. TPS is responsible for building and managing the platforms and automation that validate the comprehensive SimpliSafe ecosystem, which includes connected cameras, sensors, base stations, firmware, cloud services, monitoring workflows, and mobile applications. Our goal is to enable scalable, production-like validation across hardware, firmware, and distributed software systems. This ensures our devices perform accurately in real-world conditions and that essential customer journeys operate reliably before they are deployed to production. We are on the lookout for a Software Engineer who can lead the technical vision for TPS while managing a team of engineers. This position merges hands-on architectural responsibilities with leadership and mentorship, offering a unique opportunity for those looking to make a significant impact. This role is highly collaborative, requiring close partnerships with Infrastructure, Backend, Firmware, and Monitoring teams to ensure our validation platforms evolve in line with product and system complexity. It’s perfect for a leader who wishes to stay technically involved while shaping a high-performing engineering team dedicated to validating complex, distributed systems at scale. Your Responsibilities Establish and implement the long-term architectural vision for scalable validation platforms, with a focus on automation, performance, and resilience testing capabilities. Collaborate cross-functionally with Infrastructure, Backend, Firmware, Monitoring, and Product teams to ensure alignment of validation systems with product architecture, roadmaps, and business objectives. Guarantee that virtual devices and simulation systems accurately represent real-world hardware behavior, minimizing discrepancies between physical and virtual environments.

Role overview Klaviyo is hiring a Software Engineer II focused on Developer Experience in Boston, MA. This role centers on improving the tools and systems that support developers across the company. The goal: make it easier for engineers to build and ship strong products. What you will do Work with teams from different disciplines to refine and enhance developer workflows Contribute to the design and delivery of software solutions that raise the bar for developer productivity Help maintain and evolve internal tools and systems to support a smooth engineering experience

Whoop is hiring an Android Engineer II to join the Client Platform team in Boston, MA. This position centers on building and improving mobile applications that support athletes and fitness enthusiasts. Role overview The Android Engineer II will contribute to the development of Whoop’s mobile products. The work involves collaborating with others on the Client Platform team to deliver features and maintain app quality. The focus is on supporting users who rely on Whoop’s technology to track and enhance their performance. What you will do Develop and refine Android applications for Whoop’s platform Work with team members to solve technical challenges Help create a seamless experience for athletes and fitness users Requirements Experience with Android development Interest in mobile technology and user-focused products Ability to work collaboratively in a team setting

Role Overview CarGurus is hiring a Software Engineer II to focus on developer experience in Boston, Massachusetts. This position centers on making life easier for fellow engineers by improving the tools and frameworks they use every day. What You Will Do Work with cross-functional teams to identify and address pain points in the software development process Design and implement solutions that streamline workflows for engineering teams Build and maintain internal tools and frameworks that help teams deliver reliable, high-quality products About the Team This group collaborates closely with engineers across CarGurus to support efficient, effective software delivery. The focus is on practical improvements that make a real difference in daily development work.

At WHOOP, we are dedicated to enhancing human performance and extending healthspan. Our mission is to empower individuals to achieve their peak potential by providing in-depth insights into their physiological data through our advanced wearable technology. This technology tracks essential metrics to deliver personalized feedback that enhances fitness, health, and recovery.As a Software Engineer I, you will play a pivotal role in the design, development, and upkeep of the services that underpin WHOOP’s essential product experiences. Collaborating closely with seasoned engineers, product managers, designers, and data scientists, you will contribute to creating scalable and dependable systems that provide valuable insights to our users. This position is perfect for those eager to learn, produce high-quality code, and make a significant impact within a dynamic, mission-driven environment.

Join WHOOP on our mission to enhance human performance and extend healthspan. We empower our members with insights drawn from advanced wearable technology that translate complex physiological data into personalized experiences, fostering improved fitness, health, and recovery.The Growth Team is a dynamic, fast-paced unit dedicated to driving user acquisition, activation, engagement, and retention. As a Software Engineer I on this team, you will play a vital role in developing and optimizing user-facing web experiences that influence key business and member metrics. Collaborating closely with seasoned engineers, product managers, and designers, you will help deliver high-quality features, conduct experiments, and continuously enhance the member journey.

Join our dynamic team at Collabera as a Software Engineer, where you will play a pivotal role in developing innovative software solutions. You will collaborate with cross-functional teams to design, implement, and enhance applications that drive business success. This position offers an exciting opportunity to work in a cutting-edge environment and contribute to impactful projects.

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.

Join Our Innovative TeamBe part of the Customer Experience (CX) Product team that oversees the complete post-booking journey. From the moment a trip is booked to handling changes, disruptions, refunds, and customer support interactions, we are dedicated to enhancing the travel experience.We develop and maintain systems that provide rapid, high-quality support at scale, including:User-friendly self-service experiences within the Hopper app and partner-integrated systems.Robust internal agent platforms that facilitate efficient, high-quality human resolution.HTS Assist, our premier agentic AI platform, utilized internally and as a B2B solution for global travel partners.Our platforms serve millions of travelers across various channels—chat, voice, web, and third-party—ensuring seamless post-booking experiences worldwide.Your RoleAs a Senior Software Engineer in the CX Platform team, you will architect, build, and enhance the core systems that underpin Hopper’s post-booking experience. Your contributions will directly affect customers, internal support agents, and the growth of HTS Assist across AI-driven communication channels.You will work in close collaboration with Product, Design, AI, Data, and Operations teams to deliver intelligent, scalable customer service systems, including conversational AI workflows and self-service customer journeys.Daily ResponsibilitiesDesign, develop, and enhance backend and/or full-stack systems that support HTS Assist, internal agent tools, and customer self-service flows.Create scalable APIs, microservices, and orchestration logic for complex post-booking journeys across AI, chat, voice, and web.Collaborate with product, design, AI, and operations teams to implement features that optimize customer experiences and improve agent efficiency.Integrate with external systems such as telephony, CRM, identity, and booking platforms to support both internal and partner-specific applications.Own features from initial technical design through implementation, testing, deployment, monitoring, and iteration.

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.

Who We AreAt CarGurus (NASDAQ: CARG), our mission is empowering individuals to reach their destinations with confidence. What began as a small team of passionate developers has transformed into the largest and fastest-growing automotive marketplace, dedicated to bringing trust and transparency to car shopping. Over the past 15 years, we have achieved consistent profitability and remarkable growth driven by innovation and strategic market expansion.What We DoThe automotive landscape is shifting, and so are we. Our aim is to transition the entire car-buying journey online, guiding consumers through every phase—from selling their old vehicles to financing, purchasing, and delivering new ones. Tens of millions of consumers visit CarGurus.com each month, and approximately 30,000 dealerships utilize our products. Our employees thrive in a people-first culture that promotes kindness, collaboration, and innovation, empowering our Gurus with resources for career advancement. Join us as we disrupt a trillion-dollar industry with fresh and diverse perspectives!Role OverviewWe are looking for a Full Stack Software Engineer II to join CarGurus' Dealer Competitive Intelligence team. In this role, you will be pivotal in developing the next generation of analytics, data products, and dealer-facing experiences. This position offers a diverse range of opportunities to work across the technology stack as we build a new dealer-oriented product from the ground up. Success in this role requires quick learning and effective collaboration with a cross-functional team.

Join OpenGov as a Senior Software Engineer and become part of a dynamic team dedicated to transforming how governments operate. In this role, you will lead the design and development of innovative software solutions that empower public sector organizations to enhance transparency and efficiency.

Who We AreAt CarGurus (NASDAQ: CARG), our vision is to empower individuals on their journey to their destination. What began as a close-knit team of developers focused on trust and transparency in car shopping has evolved into the leading automotive marketplace. With a history of innovation and market acceleration that has fueled our growth, we are now the largest and fastest-growing platform in our sector, boasting over 15 years of profitability.What We DoAs the automotive market transforms, so do we. We are dedicated to taking the entire automotive journey online, providing our customers with guidance every step of the way—from selling their old vehicle to financing, purchasing, and delivering a new one. CarGurus.com attracts tens of millions of users monthly, and approximately 30,000 dealerships utilize our products. Our company culture prioritizes people, fostering collaboration, kindness, and innovation, empowering our Gurus with the resources necessary for career advancement. Join us as we disrupt a trillion-dollar industry with fresh and diverse insights!Role OverviewThe Dealer Competitive Intelligence team at CarGurus is seeking a seasoned Principal Software Engineer to define the technical direction of our platform, which will provide intricate market insights through user-friendly dealer experiences.In this pivotal role, you will serve as the primary technical authority, responsible for establishing a multi-year architectural strategy for our market intelligence solutions. Collaborating closely with leaders in Product, Data Science, and Analytics, you will convert complex competitive data into scalable, insightful, and strategic market intelligence products. If you are an architect adept at tackling large-scale challenges while balancing robust design with long-term stability, we want to hear from you!

About Datadog: At Datadog, we are dedicated to creating the ultimate platform for engineers to monitor and optimize their systems, applications, and teams. Our operations scale to trillions of data points daily, ensuring continuous alerting, metric visualization, log management, and application tracing for thousands of clients. Our engineering ethos prioritizes practicality, transparency, and simplicity to tackle complex challenges effectively. The Opportunity: As a Staff Engineer at Datadog, you will be a pivotal technical leader, driving innovations that will support our growth for the next five years and beyond. Your contributions will span across three key areas: 1. As an individual contributor, you will apply your exceptional technical expertise to create industry-leading systems in domains like data visualization, virtual runtime profiling, and large-scale streaming. 2. In your role as a technical leader, you will leverage your extensive technical knowledge and communication skills to address design and architectural challenges across the organization, steering the strategic direction and leading implementation efforts. 3. You will actively engage in the staff engineering community, sharing insights from industry best practices and past projects to enhance company-wide standards in software and systems engineering. Examples of projects you might spearhead include designing a new data storage engine capable of processing hundreds of millions of records per second, leading the development of a new product like Synthetics or Profiling, or restructuring a critical service to manage significantly increased scalability.

Join a dynamic team at Recorded Future, the world's leading and largest intelligence company, with over 1,000 intelligence professionals serving more than 1,900 clients globally!We are on the lookout for a Principal Software Engineer who will be instrumental in enhancing our Engineering team. You will be responsible for designing and scaling the data pipelines that fuel our Security Intelligence Graph. As a Principal Software Engineer, your role will involve working on both application code and infrastructure to efficiently collect, transform, and deliver structured threat data, which includes tracking malware infrastructure, phishing campaigns, spam networks, command-and-control systems, and more. You will be a key contributor in driving architectural improvements and ensuring our platform's scalability as it evolves.

At Hi Marley, we understand that insurance plays a crucial role in people's lives during their most challenging times. Our mission is to revolutionize communication within the Property and Casualty (P&C) industry, making those pivotal moments quicker, simpler, and more empathetic for both carriers and their customers. We harness the power of AI-driven software to keep the claims conversation both informed and connected. If you share our vision of merging operational excellence and automation with a human touch, we’d be thrilled to connect with you.As we expand our team, we are seeking a Senior Software Engineer who is enthusiastic about crafting high-quality software that creates a tangible impact. You will be instrumental in delivering distributed and scalable systems that facilitate meaningful interactions between carriers and their clients. The ideal candidate should have a proven track record of developing within cloud environments and a pragmatic, hands-on approach to innovation—leveraging cutting-edge technologies, including AI-assisted development tools, to tackle complex challenges and yield significant results.Collaboration and shared enthusiasm are foundational to our culture, which is why this position entails being present in our Boston office two days a week.