Senior Software Engineer for Search & Recommendations

Teamwork Makes the Stream Work. Join Roku in Revolutionizing TV ViewingAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku is on a mission to revolutionize how the world watches television. We connect viewers with the content they love, empower content creators to build and monetize their audiences, and provide advertisers with unique …

Teamwork makes the stream work. Join Roku: Transforming the Way the World Enjoys TVRoku stands as the premier TV streaming platform across the U.S., Canada, and Mexico, with an ambitious vision to power every television globally. As pioneers in the streaming realm, Roku's mission is to serve as the ultimate TV streaming platform, seamlessly connecting consumers to their favorite content while empowering publishers and advertisers alike.From your very first day at Roku, your contributions will be both significant and appreciated. We are a dynamic, rapidly growing public company where every team member plays a crucial role. Here, you'll have the opportunity to enchant millions of TV enthusiasts worldwide while gaining invaluable experience across diverse fields. Role OverviewWith millions of users globally, our products are renowned for their seamless functionality. This smooth user experience is a direct result of our unwavering commitment to developing not just intuitive but also incredibly user-friendly products. Central to this dedication is the Roku OS QA Team, which rigorously tests every product and feature to ensure we remain the most reliable streaming media platform available.Our mission is clear: to enable people to effortlessly discover and stream the content they adore. We achieve this by leveraging cutting-edge technology and engineering, always keeping the customer at the forefront of our initiatives. Team DynamicsAs a pivotal member of our team, you will utilize your diverse skill set to support both Software Engineers and QA Engineers, addressing the daily challenges they face. Your specialized knowledge will be essential in recommending enhancements that elevate quality and optimize workflows, ensuring we consistently surpass customer expectations.As a Senior Software Engineer in Test (SDET), you will be a transformative force, revolutionizing our testing methodologies. You will harness AI and advanced analytics to pinpoint quality gaps, design intelligent testing solutions, and set new benchmarks for testing effectiveness that transcend basic coverage metrics. Your ResponsibilitiesDesign and implement intelligent test analysis systems to identify quality gaps, forecast failure patterns, and enhance testing effectiveness.

About Speechify Speechify transforms text into audio, giving people new ways to access articles, documents, and books. The platform helps users listen to information when and how they want. With rapid growth, Speechify has become a leading solution for audio-based information. Role Overview The Senior Software Engineer will join the Core Experiences Team in Cambridge, United Kingdom. This group builds and maintains the core services and SDKs that power Speechify across multiple platforms. The position blends product and infrastructure work, focusing on reliable APIs and systems that shape the user experience. What You Will Do Work with product teams to define project scopes and streamline processes for faster customer feedback. Develop solutions using the cross-platform SDK, balancing integration needs and user experience. Improve existing features by designing efficient abstractions and refining algorithms to boost loading speed and parsing accuracy. Create cloud functions, lightweight backend services, and jobs using Kotlin.

Role overview Roku is hiring a Senior Software Engineer to focus on ad auctions at the Cambridge, United Kingdom office. This role involves designing, building, and refining the systems that power Roku’s advertising auctions. The team’s work ensures these systems remain scalable, efficient, and dependable as Roku’s advertising business expands. What you will do Create and enhance features for Roku’s ad auction platforms Improve system performance and scalability to handle growing demand Collaborate with teams across Roku to deliver solutions that support both user experience and revenue objectives

Teamwork makes the stream work. Roku is transforming the way the world experiences televisionAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku aims to power every TV globally. We were pioneers in streaming technology, and our mission is to connect the entire TV ecosystem. We link consumers with the content they cherish, empower content creators to grow and monetize large audiences, and offer advertisers unique tools to engage effectively with viewers.From your very first day at Roku, you'll be a key player in our dynamic environment. We're a rapidly growing public company where every voice matters and contributions are recognized. You’ll have the chance to delight millions of TV streamers worldwide while acquiring valuable experience across multiple disciplines. About the RoleWith a global user base relying on our products, we've garnered a reputation for delivering products that simply work upon first use and integrate seamlessly. This level of excellence is no coincidence; it stems from our dedication to ensuring our products are not only user-friendly but intuitively obvious. To bolster this commitment, the Roku Ads Test Automation Team is dedicated to validating Ad products and features for the industry's most dependable streaming media platform. Our objective is to assist users in discovering content effortlessly and streamlining the streaming experience through cutting-edge technology and engineering, always prioritizing the customer.We are looking for a skilled and adaptable Software Development Engineer in Test to take ownership of the quality of ad features on the Roku Platform. You will spearhead the end-to-end execution of ad products, which includes collaborating across teams for feature testing, developing comprehensive test plans, coordinating testing with manual QA teams, devising automation strategies, and overseeing the deployment of libraries and features. You should be prepared to represent automation and QA perspectives in discussions with cross-functional project team members while providing insightful end-user feedback to enhance customer experiences. This role necessitates a solid grasp of the software development life cycle, proficiency in diverse testing methodologies, excellent debugging skills, strong written and organizational abilities, and extensive automation experience. About The TeamOur team is focused on qualifying all Ads products and features on the Roku Platform. You will join a high-performing group of SDETs with a proven track record of successful deliveries.

Collaboration Fuels Innovation. Roku is transforming the way the world experiences televisionAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku aims to power every television globally. We pioneered streaming technology, and our mission is to be the ultimate platform connecting the entire TV ecosystem. We link consumers to their favorite content, enable publishers to grow and monetize vast audiences, and provide advertisers with unique engagement opportunities.From day one at Roku, your contributions will be significant and appreciated. Join our dynamic public company where every team member plays an active role. You’ll have the chance to inspire millions of TV viewers while gaining invaluable experience across diverse areas. About the Role We are developing a next-generation observability and cloud platform that is high-performance, cost-effective, secure, and scalable across multi-region, multi-cloud infrastructures. You will take the lead in architecting and evolving Roku’s observability and cloud infrastructure stack, which encompasses metrics, logs, traces, telemetry pipelines, service mesh, developer experience, and system reliability that support thousands of services and millions of devices. You will be instrumental in driving a vision where developers achieve profound visibility with minimal overhead, onboarding is effortless, and insights are accessible in real-time. Your contributions will directly empower Roku...

Teamwork makes the stream work. Join Roku in Transforming the TV ExperienceAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku is dedicated to revolutionizing how the world consumes television. Our innovative technology connects users to beloved content and empowers publishers while providing advertisers with unmatched engagement opportunities.From day one, your contributions at Roku will be significant and appreciated. As a rapidly growing public company, we encourage active participation, offering you the chance to impact millions of households globally while gaining diverse experience across various technological disciplines. Position OverviewWith over 85 million active users, our products are celebrated for their ease of use and seamless integration. This excellence comes from our commitment to developing intuitive products that enhance the streaming experience. We are seeking a Senior Software Engineer focused on developing vital features for the Roku platform's user interface. Ideal candidates will have a proven track record in building high-performing applications and SDK components, eager to contribute to a widely recognized consumer electronics platform.This role is perfect for a seasoned professional who values visibility, thrives on making a critical business impact, and is excited to work on components that influence nearly every streaming experience on Roku. Team DynamicsOur team is dedicated to enhancing customer-centric features that elevate user experience across platforms, including device integration, TV and player-centric UI, and IoT functionalities with Roku OS. Our product roadmap is designed to facilitate growth and scalability, continuously delivering innovative features to millions of Roku users worldwide.

Teamwork makes the stream work. Roku is transforming the way the world experiences televisionAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku is on a mission to power every television globally. We pioneered the streaming-to-TV experience, connecting viewers with their favorite content, enabling content creators to build and monetize extensive audiences, and offering advertisers unique ways to engage consumers.From day one at Roku, you will be an integral part of our team in a fast-growing public company where every voice matters. You’ll have the chance to delight millions of TV streamers worldwide while gaining valuable experience across various disciplines. About the Team The Advanced Development organization pushes the limits of product innovation by creating groundbreaking technologies that will influence all Roku devices in the future. Our team operates independently from standard shipping schedules, focusing on foundational technologies, including modern Linux embedded C++, build systems, cloud backend solutions, and web platforms. About the RoleJoin us as a Software Engineer Intern, where your enthusiasm for technology and innovative ideas will play a key role in our success. This is a paid 12-week internship starting in Summer 2026.We will customize your project for optimal impact during your time with us. One exciting initiative involves constructing a community-ready Model Context Protocol (MCP) server for the Roku Cloud Emulator, enabling external developers to manage virtual Roku devices via AI assistants. While we have a working internal proof-of-concept, it requires a complete rebuild for public accessibility. Our platform emulation product runs a software-only version of the Roku OS, mimicking real hardware and facilitating broader scale testing through cloud hosting. What You Will Be DoingLeading a project aimed at making our emulation product accessible to external developers through AI assistance.Collaborating with engineers across various specialties to ensure successful delivery.

Join Cambridge Mobile Telematics (CMT), the largest telematics service provider globally, dedicated to enhancing road safety. Our innovative AI-driven platform, DriveWell Fusion®, integrates sensor data from millions of IoT devices, including smartphones and connected vehicles, with contextual information to deliver insights that empower auto insurers, manufacturers, and public sector organizations to improve risk assessment and driver safety. With our headquarters in Cambridge, MA, and global presence across cities like Budapest, Chennai, Seattle, Tokyo, and Zagreb, we protect millions of drivers daily.We are on the hunt for a talented Principal Software Engineer who possesses deep expertise in full-stack development. In this pivotal role, you will lead intricate projects, mentor teams, and contribute to the technical evolution of our platform, driving its ongoing success.If you are a collaborative, innovative thinker passionate about making roads safer through technology, we invite you to apply!

About Us Graphcore stands at the forefront of innovation in Artificial Intelligence computing, crafting the hardware, software, and systems infrastructure that will pave the way for the next wave of AI advancements. Our mission is to power the extensive integration of AI solutions across various sectors. As a proud member of the SoftBank Group, Graphcore is part of a distinguished network of companies that are shaping transformative technologies. Together, we share an ambitious goal: to foster Artificial Super Intelligence and ensure its advantages are accessible to all. Our teams are composed of individuals from diverse backgrounds, bringing a rich variety of skills and viewpoints. This melting pot of AI researchers, silicon designers, software engineers, and systems architects cultivates a culture of continuous learning and relentless innovation. Job Summary The System Software group includes the Firmware team, the Drivers and Utilities team, and the System QA team. We are tasked with enabling all silicon and hardware platforms developed by our talented colleagues at Graphcore. Our objective is to create high-quality software and APIs that empower the broader software team to utilize our products efficiently and effectively. The Firmware and Drivers teams form the cornerstone of the Graphcore software stack, which serves as the foundation for all customer-facing systems. The Team The Drivers and Utilities team specializes in developing both kernel and user space software, enabling our customers to harness the full performance and utility of our unique hardware. We collaborate closely with the software engineering team responsible for our Poplar SDK, supporting machine learning applications, and with silicon and hardware engineers to maximize the potential of our Graphcore IPU solution. Key Responsibilities Write code that adheres to Graphcore standards. Develop appropriate unit tests for all written code. Engage in code reviews both individually and collaboratively. Participate in Scrum ceremonies. Conduct manual testing on code developed by yourself and others. Maintain and troubleshoot our Continuous Integration system. Contribute to and engage in technical design discussions with team members. Candidate Profile Essential Qualifications Bachelor’s or Master’s Degree in Computer Science, Mathematics, Machine Learning, Data Science, or a related field. Demonstrated passion for software development and a strong understanding of programming fundamentals. Team-oriented mindset with excellent communication skills.

Join the Future of AI at GraphcoreAt Graphcore, we are pioneering the next generation of AI computing technology.Our team comprises seasoned professionals from semiconductor, software, and AI sectors, with extensive expertise in developing a comprehensive AI compute infrastructure—from silicon and software to large-scale data center solutions.As a proud member of the SoftBank Group, we benefit from substantial long-term investment, enabling us to contribute pivotal technology to the rapidly evolving SoftBank AI ecosystem.In response to the immense opportunities within the AI landscape, Graphcore is expanding its global teams, uniting brilliant minds to tackle the most challenging problems in an environment where each member can significantly influence our company, products, and the future of artificial intelligence.

Collaboration Fuels Innovation. Join Roku in Transforming TelevisionAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku aims to power every television globally. We pioneered the streaming revolution, and our mission is to connect the entire TV ecosystem. We empower viewers with access to their favorite content, assist content creators in reaching vast audiences, and offer advertisers unparalleled engagement tools.From day one at Roku, your contributions will be recognized and valued. In our rapidly growing public company, you won’t just observe; you will play a vital role in enhancing the experience for millions of TV streamers across the globe while gaining invaluable experience across various fields. About the TeamThe Advanced Development team at Roku is at the forefront of innovation, creating the next generation of intelligent and generative media systems. We explore concepts that are years ahead of production, crafting foundational technologies that will redefine content understanding, creation, and personalization across millions of Roku devices.This unique environment is comprised of a PhD-level, interdisciplinary team that merges machine learning research, software engineering, and DevOps. Our experts possess not only deep technical knowledge but also a broad creative vision, challenging the status quo, embracing uncertainty, and building unprecedented solutions. Our culture is collaborative, low-ego, and driven by ownership, trust, and curiosity.We seek an Applied Scientist with a robust foundation in mathematics, machine learning, and computer science, complemented by experience in cloud engineering, DevOps, and computer vision — someone who excels at the intersection of research and production.

ISEE is on the lookout for a dedicated Robotics Engineer to become a vital part of our innovative team in Cambridge, MA. The ideal candidate will possess a robust background in robotics, gained through hands-on experience in industry, academic research, or internships.Key Responsibilities:- Design, implement, and maintain software solutions, including core algorithms and infrastructure, for our cutting-edge robotic arm trailer coupling system.- Engage in hands-on troubleshooting and problem-solving for the robotic arm.

Collaboration is Key to Innovation. Join Roku in Transforming the Television ExperienceRoku stands as the leading TV streaming platform in the U.S., Canada, and Mexico, with ambitions to empower televisions globally. As pioneers in TV streaming technology, our mission is to connect the entire television ecosystem. We bridge viewers to their favorite content, assist content publishers in growing their audiences, and offer advertisers innovative ways to connect with consumers.Your journey with Roku begins with a significant contribution from day one. As a rapidly expanding public company, we ensure that all team members are engaged participants. Here, you can delight millions of TV streamers worldwide while gaining invaluable experience across diverse disciplines. About the TeamOur distributed team spans multiple continents and time zones, dedicated to crafting high-quality software releases for Roku’s latest player devices. We thrive on agility and have a strong commitment to creating user-friendly and enjoyable products. As an intern, you will be treated as a valued contributor, collaborating with engineers, QA experts, product managers, and other stakeholders, with ample support through mentorship, feedback, and structured onboarding. Position OverviewThis internship is ideally suited for students entering their Placement Year with an interest in embedded software development and software quality. You will play a crucial role in enhancing product quality and developer productivity by contributing to automated testing, troubleshooting issues, and optimizing testing processes for C/C++ applications on embedded/Linux-based systems.

Role overview Speechify seeks a Senior Software Engineer to focus on Windows and desktop applications at the Cambridge, MA office. This role involves building and supporting desktop software for Windows, collaborating with a talented team to deliver features that enhance user interaction with Speechify’s products. What you will do Design, develop, and maintain desktop applications for Windows platforms Collaborate with fellow engineers to implement new features and refine existing ones Help shape the user experience by ensuring software remains reliable and intuitive

Join Riverlane as a Senior Digital Design Engineer in Cambridge, UK. This full-time, permanent position offers a hybrid working model.Salary Range: £70,000 to £90,000 DOE + Bonus + BenefitsWe are flexible and will consider part-time applications. Please specify your preferred working hours in your cover letter.

Join Cambridge Mobile Telematics (CMT), the largest telematics service provider globally, dedicated to enhancing road safety for all drivers. Our innovative AI-driven platform, DriveWell Fusion®, aggregates data from millions of IoT devices—including smartphones, proprietary Tags, connected vehicles, and dashcams—fusing it with contextual information to provide a comprehensive view of driver and vehicle behavior. Our insights are utilized by auto insurers, automobile manufacturers, commercial mobility companies, and public sector entities to enhance risk assessment, safety protocols, claims processing, and driver improvement initiatives. With our headquarters in Cambridge, MA, and offices in Budapest, Chennai, Seattle, Tokyo, and Zagreb, we safeguard millions of drivers worldwide every day.As a Principal Machine Learning Engineer at CMT, you will craft algorithms that model the physical phenomena associated with vehicle and human movements as captured by mobile sensors and IoT devices. Your expertise will help solve complex real-world challenges and drive innovative solutions through exploratory data analysis on intricate, high-dimensional datasets. Leveraging your knowledge in statistics, machine learning, deep learning, signal processing, physics, programming, and data modeling, you will spearhead Data Science projects, independently create new solutions to meet CMT’s goals, and contribute to company-wide prototype development and product enhancements.If you are a collaborative, customer-focused, and inventive Principal Machine Learning Engineer eager to contribute to safer roads and better driving practices, we welcome your application!

Location: Cambridge, MA (Eastern Time / UTC -4)Relocation package: AvailableStart date: ASAPLanguages: English (required)About the RolePragmatike is collaborating with an innovative AI startup, acknowledged as a Top 10 GenAI company by GTM Capital, founded by researchers from MIT CSAIL. We are looking for a Principal Full Stack Engineer specializing in Node.js + React who possesses extensive hands-on expertise in crafting scalable, high-performance web applications that support intricate, data-driven AI solutions utilized by Fortune 500 clients.This position is perfect for those who relish taking ownership of features from inception to completion—encompassing backend architecture and refined frontend delivery. The ideal candidate will be adept at designing APIs, constructing scalable services, developing user-friendly interfaces, and deploying production-ready features at scale.ResponsibilitiesDesign, develop, and maintain scalable full stack applications using Node.js, React, and TypeScript.Architect and create robust backend services, APIs, and data models.Build modern, production-grade web interfaces with React.Own features throughout the entire lifecycle, from technical design and implementation to deployment and production support.Enhance performance across the stack, including frontend rendering, API latency, and database queries.Collaborate closely with product, design, and AI/ML teams to deliver user-centered features.Establish best practices for testing, code quality, observability, and CI/CD processes.Enhance overall system architecture, scalability, and developer experience.Diagnose and resolve production issues spanning both frontend and backend systems.QualificationsMinimum of 5 years of experience as a Full Stack Engineer.Strong expertise in Node.js (including frameworks such as Express, NestJS, or similar).Proficient in React and TypeScript in production settings.Experience designing RESTful APIs and working with databases like PostgreSQL or MongoDB.Solid understanding of modern web architecture and principles of distributed systems.Proven experience in building scalable applications and deploying them effectively.Exceptional problem-solving skills and a passion for technology.

Join Kayak as a Senior Frontend Software Engineer and be part of an innovative team dedicated to creating exceptional user experiences. In this role, you will design, develop, and maintain user-facing features for our cutting-edge travel platform. Collaborate with cross-functional teams to implement responsive and visually appealing web applications.

Collaborative Innovation for a Seamless Streaming Experience. Join Roku in Revolutionizing TelevisionRoku, the leading TV streaming platform across the U.S., Canada, and Mexico, is on a mission to power every television worldwide. As pioneers of streaming to the TV, we aim to connect consumers with their favorite content, empower content publishers to grow their audiences, and provide advertisers with unique tools to engage viewers.From day one, your contributions at Roku will be significant and cherished. As a fast-growing public company, we ensure that every team member plays an active role in delighting millions of TV streamers globally while gaining invaluable experience across diverse fields. About Our TeamOur team is dedicated to building and enhancing the UI framework and components that create remarkable Roku user experiences. Our roadmap is designed to accelerate growth and scalability, delivering exciting new features to tens of millions of Roku users worldwide.We empower our developers and engineers to take ownership of their projects, motivated to tackle challenges that need solutions. Collaboration with different engineering teams, product designers, and business leaders is key to our success, fostering an environment where independent thinkers thrive. Role OverviewAs a Senior Software Engineer focusing on UI Infrastructure, you will play a pivotal role in the ongoing development of our embedded UI framework. Collaborating closely with system architects, you will innovate new features and enhance existing functionalities to boost system stability and performance. Additionally, you will contribute to the development of tools that benefit the broader Roku development community. A solid history of delivering high-quality software on embedded platforms is required for this role. This is an excellent opportunity for a seasoned professional eager to shape the future of streaming media.