Software Engineer II - Frontend for AI Platform

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 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.

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

ezCater is the premier technology company in the food-for-work sector in the U.S., connecting those in need of workplace meals with over 100,000 restaurants across the country. We offer flexible and scalable solutions for everything from regular employee meals to one-time events, all supported by 24/7 customer service with real human assistance. Our platform allows companies to manage their food expenditures with customizable options, while we empower restaurant partners by increasing their order volume and attracting high-value customers.As a Senior Software Engineer on the Supplier Platform team, you will develop capabilities that enable our restaurant partners to grow their businesses effectively within the ezCater ecosystem. Your responsibilities will include designing and constructing data structures and services that ensure our partners receive a top-tier reporting experience and personalized interactions within the product.You will work collaboratively with teams across Data Engineering, Security, Product, Operations, and other engineering groups within the company. This position reports to the Engineering Manager of the Supplier Platform team within the ezCater Product Engineering organization.

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.

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.

Role Overview Whoop is looking for a Senior Fullstack Software Engineer to join the AI Platform team in Boston, MA. This team builds technology that supports athletic performance and wellness, using artificial intelligence to deliver real impact. What You Will Do Design, implement, and optimize software solutions across both frontend and backend systems Work closely with cross-functional teams to bring new features and improvements to life Focus on delivering a seamless user experience while maintaining system performance and reliability What We Look For Experience in fullstack development, with skills in both frontend and backend technologies Interest in artificial intelligence and its applications in health or performance domains Ability to collaborate with engineers, designers, and product managers If building innovative software for athletes and wellness interests you, Whoop encourages you to apply.

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.

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.

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.

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

Join Anduril Industries as a Principal Software Engineer specializing in Platform Security. In this pivotal role, you will lead the development of secure software solutions, ensuring the integrity and safety of our innovative technology. Your expertise will drive the implementation of security best practices across platforms and contribute to our mission of developing cutting-edge defense technology.

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.

Join Recorded Future as an Email Marketing Campaign Specialist, where you'll play a pivotal role in enhancing our email communication strategies. In this dynamic position based in Boston, MA, you will design and implement innovative email marketing programs to foster user engagement and retention. You will be responsible for crafting visually appealing email templates, optimizing program logic, and segmenting audiences effectively to align with different stages of the customer journey. Your analytical approach will enable you to set ambitious objectives for each campaign, ensuring that performance metrics guide your strategies. Collaborating closely with leadership, you will develop a deep understanding of our clients' needs and take ownership of key aspects of our communication strategy while coordinating with various teams to align messaging and schedules.

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:...

Anduril Industries stands at the forefront of defense technology, dedicated to revolutionizing military capabilities for the United States and its allies through cutting-edge innovation. Our mission is to integrate the expertise, technology, and business models of the most pioneering enterprises into the defense sector, fundamentally transforming the design, construction, and commercialization of military systems. Our suite of solutions is driven by Lattice OS, an AI-enhanced operating system that consolidates thousands of data streams into a dynamic, 3D command and control environment. As we navigate the complexities of global strategic competition, Anduril is devoted to delivering state-of-the-art autonomy, artificial intelligence, computer vision, sensor fusion, and networking technologies to military operations in a matter of months, not years.ABOUT THE TEAMThe Developer Platform team is the foundation of Anduril’s engineering ecosystem, creating essential infrastructure that empowers teams to deploy mission-critical defense systems effectively. In this role, you will refine release pipelines and CI/CD workflows that power Anduril's Software Factories across the U.S., Australia, and the UK. You will also develop productivity-enhancing tools, including our Golang-based dx CLI, while architecting data infrastructure to derive actionable engineering metrics and KPIs. Your contributions will significantly enhance productivity throughout our software engineering landscape, establishing a scalable foundation that aligns with Anduril’s growth and its mission to tackle pivotal defense challenges through advanced technology.

Join Harvard University as a Scientific Platform Engineer, where you will play a crucial role in the development and maintenance of advanced scientific computing platforms. This position offers an exciting opportunity to collaborate with leading researchers and contribute to groundbreaking projects. You will be responsible for designing, implementing, and optimizing software solutions that support scientific research initiatives.

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.