Senior Systems Engineer at Merlin Labs | Boston

Join us in transforming how the Department of Defense approaches multi-billion-dollar force-design decisions. As a Senior Backend Platform Engineer, you will integrate physics-driven simulations, interactive computing, and validated AI code generation to develop cutting-edge wargaming platforms. If the prospect of creating ultra-low-latency APIs, managing hi…

Role Overview Datadog is looking for a Senior Software Engineer focused on Distributed Systems to join teams in Boston, MA or New York, NY. This role centers on designing, building, and maintaining the core platforms that power Datadog’s applications. These systems handle data at massive scale, supporting real-time ingestion, storage, analysis, and querying of billions of events from customers worldwide. What You Will Do Design and implement distributed data pipelines built for durability, high availability, and low latency Operate and improve platforms that support internet-scale workloads Ensure systems are reliable and efficient for real-time analytics Workplace and Culture Datadog values a lively office culture that encourages creativity, teamwork, and strong connections among colleagues. The company offers a hybrid workplace model to support work-life balance.

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.

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 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 and motivated engineers to join our team, propelling our established system to unprecedented heights. Join the AI Platform team at WHOOP where we are tasked with building a robust foundation that facilitates the scalable, responsible, and accessible implementation of Generative AI across our diverse array of products. Our primary focus is on creating reusable infrastructure, services, and tools that empower both product and software teams to explore, integrate, and deploy GenAI-powered features both efficiently and securely. By simplifying the complexities associated with large language models (LLMs) and ensuring the delivery of personalized insights to our members, our platform accelerates innovation while maintaining a consistent, high-quality user experience. As a Senior Software Engineer on the AI Platform team, you will play a pivotal role in designing and scaling the systems that underpin WHOOP’s Generative AI capabilities. You will develop robust, modular services and user-friendly tools that streamline the interaction with GenAI models across the organization. This position merges a platform-oriented mindset with engineering excellence, helping WHOOP unlock the full potential of Generative AI across our core products, coaching services, insights, and beyond.

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.

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.

Join our team at Klaviyo as a Senior AI Platform Engineer and be part of a transformative journey in the AI and machine learning landscape. We are looking for an innovative engineer who is passionate about designing and scaling backend systems that power cutting-edge AI products and solutions. In this role, you will have the opportunity to influence architecture decisions, enhance asynchronous processing, and work with distributed systems. Collaborate with product managers, machine learning engineers, and data scientists to create impactful solutions for over 167,000 customers globally. This hybrid role is based in the vibrant city of Boston, where creativity and technology converge.

We are on the lookout for a highly skilled Senior Backend Software Engineer to become an integral part of our dynamic team. In this role, you will collaborate in the design, implementation, and deployment of our core data pipeline and processing platform for our innovative AI-native cloud environment. Your expertise will be pivotal in creating robust, scalable, and sophisticated solutions to tackle intricate cybersecurity challenges. You will take charge of selecting and implementing the essential technologies and architectures needed for success.Key Responsibilities:- Architect, implement, and maintain the foundational data pipelines and processing platform for our AI-native cloud services.- Develop high-quality, scalable, and elegant solutions for complex cybersecurity scenarios.- Evaluate and integrate appropriate technologies and architectures.- Guarantee the scalability, reliability, and performance of our cloud-based offerings.Qualifications:- A minimum of 7 years of experience in backend development.- Proven hands-on experience with cloud architecture and deployment.- Familiarity with a diverse array of cloud technologies and architectural frameworks.- Exceptional software development skills, coupled with a proactive, fast-paced approach to shipping solutions.- Bachelor's degree or equivalent in a relevant discipline.- Strong analytical thinking and communication abilities.About Seven AI:At Seven AI, we welcome professionals at all levels who are passionate about making a significant impact and thriving in a fast-paced, growth-oriented environment. With the rapid advancement of AI technology, this is an exciting time to join us, where your skills can influence the future of cybersecurity. You will engage with cutting-edge technology and spearhead innovative solutions while working alongside industry experts committed to safeguarding against emerging AI-driven threats. Our culture emphasizes respect, collaboration, and a shared dedication to delivering exceptional value to our clients. If you are enthusiastic about building remarkable solutions and desire to be in an environment where your contributions are valued, we would love to hear from you.

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.

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 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.

At WHOOP, we are dedicated to elevating human performance through comprehensive insights into individual health and daily habits. We empower our members to achieve their peak potential.As we expand our technically advanced IT organization, we invite applications for the role of Senior Systems Engineer. This vital position will involve designing and constructing a robust framework for innovative and scalable IT operations. You will take ownership of our IT systems, processes, and infrastructure, propelling advancements in employee experience, identity and access management, automation and self-service, endpoint engineering, corporate security, compliance readiness, and much more. As one of the initial members of a dynamic and rapidly growing team, you will be expected to embrace significant responsibilities, navigate uncertainty, and shape the definition of world-class IT capabilities at WHOOP.This role will require close collaboration with company leadership, security teams, risk and compliance departments, IT support, and business systems.This is a high-impact position with an expansive scope of work, and while we don't anticipate superhuman results from a single individual, we are eager to attract candidates who thrive on challenges, are energized by technical problem-solving, and are poised to make a substantial impact.

About WHOOP WHOOP helps people understand their bodies and habits so they can perform at their best and improve their healthspan. The team builds tools and insights that support members in reaching their goals every day. Role Overview The Senior Backend Software Engineer - Health Records will design and build the systems that connect external healthcare data with the WHOOP platform. This work ensures health data is integrated securely and can scale as needs grow. The role focuses on transforming complex health records into insights that members can use, strengthening WHOOP’s ability to deliver personalized health experiences and long-term value.

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 dynamic Development Security Operations (DevSecOps) team as a Senior Platform Engineer within the Platform Engineering organization at InterSystems. This pivotal team plays a crucial role in enhancing Application Security (AppSec) throughout our build pipelines, fortifying security measures during deployment, ensuring secure Supply Chain deliveries, and continuously improving our DevOps workflows. As a Senior Platform Engineer, you will engage as a full-stack developer with a robust DevSecOps mindset. Your responsibilities will encompass a variety of projects, including enhancing build pipelines, providing a comprehensive view of our security posture to the Security team, and exploring innovative tools and processes to elevate our environment. Your contributions will be instrumental in securing our development infrastructure while fostering a culture of continuous improvement. This role is perfect for engineers who are deeply passionate about security, thrive on solving technical challenges collaboratively, and excel in a fast-paced environment.

About Acadian Asset Management Acadian Asset Management is a global investment manager based in Boston, specializing in systematic, data-driven investing since 1986. With offices in Singapore, London, and Sydney, Acadian manages over $170 billion in assets for clients such as pension funds, endowments, foundations, and sovereign wealth funds. The firm uses advanced technology, large datasets, and interdisciplinary expertise to help clients navigate complex markets and uncover insights that traditional approaches may overlook. Acadian values collaboration and intellectual rigor. The team encourages diverse viewpoints and continuous innovation. Employees benefit from a flexible hybrid work model, comprehensive benefits, and a company culture that balances focus with a relaxed atmosphere. Role Overview: Senior Engineer II, Platform, Identity & Operations This role centers on developing and improving Acadian’s Identity and Configuration Platform. The team’s mission is to deliver secure, scalable, and seamless access to systems across both cloud and on-premises environments. The Senior Engineer II will design and build APIs, services, and tools that standardize identity, configuration, and operational practices, making secure access consistent and reliable for all teams. Main Responsibilities Design, build, support, and operate key infrastructure for identity and configuration management. Create APIs, services, and tools that unify identity and operational patterns across the company. Incorporate security by design, ensuring that patterns and services are easy to adopt. Work hands-on across software development, architecture, and SRE operations. Contribute expertise in areas such as enterprise identity management, production SSO, DNS, certificate services, secrets management, and EKS. Act in both building and advisory capacities within the platform engineering team. Work Location This position follows a hybrid model. Employees are expected to work on-site at the Boston office three days per week.

Join our innovative team at Anduril Industries as a Senior Software Engineer specializing in Platform Security. In this pivotal role, you will be responsible for designing and implementing robust security frameworks that protect our cutting-edge technology solutions. Your expertise will help us safeguard our systems against the ever-evolving landscape of cyber threats.As a key member of our engineering team, you will collaborate with cross-functional teams to identify security vulnerabilities and develop effective mitigation strategies. You will leverage your deep knowledge of software engineering principles and security best practices to enhance the security posture of our platforms.

Location: Boston, MA; Costa Mesa, CA; Seattle, WA About Anduril Industries Anduril Industries builds advanced defense technology for the U.S. and allied nations. The company’s systems run on Lattice OS, a platform that fuses thousands of data streams into a real-time, 3D command and control environment. Anduril focuses on delivering autonomy, AI, computer vision, sensor fusion, and networking solutions to military operations quickly, often in months rather than years. Team Overview: Developer Platform The Developer Platform team provides the backbone for software development at Anduril. This group manages the main developer CLI, which sees over 93,000 uses by more than 2,300 engineers. CI/CD pipelines support 3,500+ engineers across 23 product lines in the U.S., Australia, and the U.K. The team also handles deployment and release management systems, as well as the company’s LLM adoption platform. Now, the team is launching a new agentic development initiative to build next-generation AI-centric developer infrastructure. What You Will Do Build infrastructure for multi-agent orchestration, enabling AI coding agents to operate autonomously on servers and manage tasks across repositories at scale. Develop a real-time, agent-optimized knowledge base that gives AI agents detailed context about codebases, architecture, and operational patterns. Create a skills and plugin platform so teams can encode domain expertise into reusable AI features. Improve CI/CD reliability and the developer experience across 23 product lines. Design and refine release tools to simplify software deployment to production and robotic platforms. Oversee and enhance Anduril’s LLM adoption platform, including model rollouts, capacity planning, cost tracking, and developer onboarding.