Principal Software Engineer, Mobile

At Cambridge Mobile Telematics (CMT), we are the leading telematics service provider globally, dedicated to enhancing road safety and improving driver performance. Our innovative AI-driven platform, DriveWell Fusion®, integrates sensor data from millions of IoT devices—including smartphones, proprietary Tags, connected vehicles, dashcams, and third-party dev…

Teamwork makes the stream work. Roku is revolutionizing the way the world consumes televisionAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku is on a mission to power every television globally. With a pioneering spirit in streaming, we aim to create a comprehensive TV ecosystem connecting viewers with their favorite content, empowering content creators to engage audiences, and providing advertisers with innovative engagement tools.From day one at Roku, your contributions will be meaningful and appreciated. Join our dynamic, fast-paced public company where every team member plays a vital role in delighting millions of viewers worldwide while gaining invaluable experience across diverse areas. About the TeamBecome a part of a dedicated team focused on delivering customer-centric features that enhance user experiences on a global scale. We specialize in developing engaging content such as wallpapers, screensavers, trivia, and featured experiences, alongside innovative AI projects for content generation. Guided by an ambitious product roadmap, we aim to accelerate growth by introducing cutting-edge features to millions of users worldwide.We cultivate a culture of ownership and self-motivation, encouraging engineers and developers to tackle challenges and deliver impactful solutions. Collaboration is essential as our engineers work closely with cross-functional teams, including UI design, product management, and business leadership. If you are passionate about transforming the streaming media landscape in a collaborative, dynamic environment, this team is perfect for you. About the RoleOur products are renowned for their seamless integration and user-friendly design that delight users from the outset. These attributes stem from our meticulous engineering practices and relentless pursuit of excellence.As a member of the engineering team, you will develop and manage features for Screensavers, Static & Dynamic Wallpapers, Trivia, Featured Experiences, and AI initiatives. Your work will focus on creating user-enhancing experiments through innovative AI-driven features.

Collaboration Fuels Innovation. Join Roku - Revolutionizing TV ViewingAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku is on a mission to empower every television worldwide. Pioneering the streaming experience, we connect viewers to their favorite content, support publishers in audience growth and monetization, and provide advertisers with exceptional tools for consumer engagement.From day one at Roku, your contributions will be valued. We are a rapidly expanding public company where every team member plays an essential role. This is your chance to impact millions of TV streamers globally while gaining significant experience across diverse disciplines. About Our TeamThe Advertising Performance team is dedicated to optimizing the performance of all participants in the advertising ecosystem, including advertisers, publishers, and Roku itself. Our systems and solutions leverage various disciplines and technologies for real-time, multi-objective optimization on a large scale with minimal latency. Utilizing Machine Learning, Reinforcement Learning, AI, and Optimization Systems, we tackle a wide array of complex challenges. Central to our efforts is our Machine Learning, Experimentation, and Inference Platform that supports the entire operational landscape.

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 engagement opportunities.From your first day, your contributions will be invaluable. As a fast-growing public company, we encourage active participation from all team members, offering opportunities to delight millions of viewers while gaining diverse experience across various fields. About the TeamAt Roku, we pioneered streaming to the TV and continue to lead the industry with innovation. Our multi-disciplinary team is responsible for developing the architecture and implementing the services that power Roku's browse and discovery platform, which serves as the backbone for The Roku Channel, delivering a vast array of free and premium content to millions globally. About the RoleWe are on the lookout for a Senior Software Engineer experienced in building scalable services. With millions relying on us for their entertainment needs, we prioritize scaling, reliability, and automation while continuously enhancing our platform. Collaborating closely with the product team, we pride ourselves on rapidly iterating features from prototypes to A/B tests and finally to full release. There are ample opportunities to tackle intriguing challenges as we shape the future of this platform.The ideal candidate is driven by curiosity and possesses a global perspective combined with locally relevant execution. You should be a resilient problem solver and self-starter, capable of driving initiatives alongside product and commercial teams at Roku and with external strategic partners. A balance of technical and interpersonal skills is essential, as adaptability to shifting business requirements is key.

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

Nuclera is a venture-backed biotech company headquartered in Cambridge, UK, with additional operations in Boston, USA. The team focuses on accelerating scientific discovery by making functional proteins more accessible for drug discovery research. Nuclera’s eProtein Discovery™ benchtop system helps research labs optimize protein expression and purification workflows. Role overview The Senior Embedded Software Engineer will help shape the next generation of Nuclera’s instrument platform. This role covers the full spectrum of embedded systems work, from low-level hardware control to higher-level application features. The position suits an engineer comfortable moving between bare-metal firmware, RTOS, and embedded Linux environments. What you will do Design and implement embedded software for complex scientific instruments Work on both hardware-level interactions and user-facing application logic Contribute to a system that must be reliable, scalable, and high-performing Collaborate across hardware, software, and scientific teams to deliver integrated solutions What we are looking for Experience with bare-metal firmware development Background working with RTOS and embedded Linux Ability to design and execute embedded systems for scientific or technical products Versatility to work across different layers of the embedded stack Location This position is based in Cambridge, England, United Kingdom.

We are seeking a highly skilled QA/QC Specialist III to join our dynamic team in Cambridge. In this pivotal role, you will ensure the highest quality standards are met throughout our projects. You will be responsible for developing and implementing quality assurance protocols, conducting audits, and collaborating with cross-functional teams to deliver exceptional results.

We are seeking a highly skilled and experienced Director of Clinical Quality to join our dynamic team at Integrated Resources, Inc. In this pivotal role, you will be responsible for overseeing the clinical quality management systems, ensuring compliance with regulatory standards, and driving continuous improvement in clinical processes.Your leadership will be vital in fostering a culture of quality and safety, collaborating with multidisciplinary teams to enhance patient outcomes and operational efficiency.

At Gearset, a product-driven company founded by engineers, we truly value a vibrant engineering culture. Our engineering team thrives on a foundation of trust, collaboration, and continuous feedback.With our flat organizational structure, efficient processes, and commitment to delivering features promptly to our users, new team members have the opportunity to make a significant impact from day one.Whether you're an experienced individual contributor or a technical leader, we are eager to connect with you!

Join Castle: The Innovative Finance App for Homeowners!At Castle, we empower homeowners to efficiently manage and track all their home expenses in one convenient platform. Our app not only simplifies payments but also identifies opportunities for savings. On average, our users save over $10,000.With housing affordability being a pressing issue in the U.S., we are committed to providing homeowners with superior data management for their most significant asset. Our mission is to create advanced payment infrastructure for the largest consumer sector in the country, helping people streamline and reduce their expenses.As a vital member of our engineering team, you will contribute to crafting simpler, smarter, and more intuitive experiences for our users. Working closely with our Head of Engineering, Head of Design, and fellow developers, you will help create a user-friendly application that demystifies home expense management and fosters long-term trust with our customers.This position is ideal for individuals who are eager to tackle complex challenges and keen on learning new technologies. You will play a key role in shaping a powerful product within an early-stage, high-growth company.

Our Mission Speechify aims to make information accessible through audio. The platform lets users listen to articles, documents, and books on their own schedule, at work, while commuting, or during downtime. Like streaming changed audio entertainment, Speechify is changing how people consume written content. The company leads its category and continues to grow rapidly. Role Overview The Senior Software Engineer, Core Experiences, joins a team responsible for the foundational services and SDKs that power Speechify’s product across multiple platforms. This position suits engineers who enjoy working where product and infrastructure meet, and who bring a strategic approach to designing APIs and systems that improve the user experience. What You Will Do Work closely with Product Teams to define project scopes, streamline feedback loops, solve integration and user experience challenges across teams, and deliver solutions through Speechify’s cross-platform SDK. Improve existing features by optimizing performance, reducing load times, and refining parsing through new abstractions and algorithm updates. Build and deploy cloud functions, lightweight backend services, and tasks using Kotlin. Location This role is based in Cambridge, MA, USA.

POS-4092 Team and Product Focus The Data Hub team at HubSpot connects scattered data sources to deliver practical insights for Revenue Operations, marketing, sales, and customer teams. By integrating information from various channels and tools, the team improves data quality and makes this data actionable within HubSpot. This enables teams to run AI-powered demand generation, optimize campaigns, and produce reliable reports, without requiring deep expertise in data systems. Product engineering here blends data engineering, machine learning, applied AI, and market strategy. The group prioritizes reliability, cost efficiency, and scalability, while always considering usability for marketers and sales professionals. Role Overview HubSpot is seeking a Lead Principal Software Engineer to steer the next phase of Data Hub's development. This platform is evolving into the central engine for data-driven demand generation company-wide. Key Responsibilities Take ownership of critical components in the data lake and analytics architecture, working with technologies such as Iceberg, Spark, and both batch and streaming data pipelines. These systems underpin large-scale demand generation, segmentation, and scoring. Design and refine data systems to achieve the right balance between cost, latency, data freshness, and reliability. Apply principles like the CAP theorem, efficient partitioning, and thoughtful storage layout to guide decisions. Collaborate closely with Product Management, product analytics, and go-to-market leaders to deliver solutions that drive business outcomes: improved lead scoring, enhanced funnel visibility, audience segmentation, and campaign attribution for marketing and sales. Contribute to transforming Data Hub into an AI-powered platform, aiming for curated, always-available datasets that support AI agents and reporting tools, eliminating the need for manual integrations or custom pipelines. This is a hands-on principal engineering position. The role involves building systems, working alongside product and design, and amplifying the impact of HubSpot's broader engineering community.

Join the innovative team at ph7 as a Software Engineer specializing in JavaScript. In this role, you will have the opportunity to work on cutting-edge projects, collaborating with talented professionals who are passionate about technology and innovation.Your responsibilities will include developing and implementing dynamic web applications, ensuring optimal performance, and contributing to the overall development strategy. If you are eager to tackle new challenges and grow your skills in a vibrant environment, we want to hear from you!

Speechify’s mission is to remove reading barriers and open up learning opportunities for everyone. Our text-to-speech technology supports over 50 million users, turning PDFs, books, Google Docs, news articles, and websites into audio. This helps people read more efficiently and remember more. The product suite covers iOS, Android, Mac, a Chrome Extension, and a Web App. Speechify has earned recognition from Google as Chrome Extension of the Year and received Apple’s 2025 Design Award for Inclusivity. The team is fully distributed, with nearly 200 professionals from companies such as Amazon, Microsoft, and Google, as well as graduates from Stanford and other top universities. Speechify operates without physical offices. Role Overview This Software Engineer position sits within the AI team, focusing on data infrastructure and acquisition. The work spans all aspects of data collection to support model training. The role blends infrastructure, engineering, and research to help build high-quality datasets at petabyte scale, efficiently and cost-effectively. What You Will Do Identify and source new audio data to improve the data ingestion pipeline. Manage and expand cloud infrastructure for data ingestion, currently on Google Cloud Platform (GCP) and managed with Terraform. Work closely with scientists to improve data quality, throughput, and cost, supporting the development of future models. Collaborate with the AI team and leadership to plan and prioritize datasets for upcoming consumer and enterprise products. What We Look For BS, MS, or PhD in Computer Science or a related field. At least 5 years of professional software development experience. Strong skills in bash and Python scripting in Linux environments. Familiarity with Docker and Infrastructure-as-Code, with hands-on experience using a major cloud provider (GCP preferred). Experience with web crawlers and large-scale data processing is a plus. Comfort handling multiple priorities and shifting focus as needed. Clear verbal and written communication skills. Location: Cambridge, United Kingdom (fully remote/distributed team).

Join Redgate Software as a Lead Software EngineerAt Redgate, we develop brilliantly intuitive software solutions that empower data professionals to maximize the value of their databases. Our innovative tools tackle intricate database management issues throughout the DevOps lifecycle, simplifying processes for IT leaders, development teams, and operations by enhancing efficiency, minimizing errors, and safeguarding crucial business data. The data community relies on Redgate for a harmonious blend of rapid deployment, team collaboration, and robust data protection.Learn more about our culture and team:Redgate Software – CultureFlexa CareersGlassdoorRepVueAs our Lead Software Engineer, you will collaborate within a dynamic, cross-functional team, including a Tech Lead, Product Designer, Product Manager, and several software engineers. You will also have the guidance of the Group Engineering Manager and an Architect, who will support you in overcoming challenges and achieving your goals.This role focuses on developing the next generation of AI capabilities aimed at enhancing database administration. You will be instrumental in creating new interfaces and methodologies that cater to the needs of database professionals utilizing agentic AI, while also collaborating with other teams at Redgate to integrate features from their tools into the workflow.Your role will be hands-on, influencing the team's approach to tackling complex engineering challenges. You will oversee the quality of engineering practices within the team and foster the growth of your colleagues. Additionally, you will lead interdisciplinary engineering initiatives and work closely with your architect to guide technical strategy.Beyond technical expertise, a critical aspect of your role is to elevate the entire team through mentoring, coaching, and sharing your knowledge. You will work closely with team leadership to establish and achieve team objectives.

The Engine supports Tough Tech entrepreneurs who are developing solutions for major global challenges. As a nonprofit, the organization connects founders with infrastructure, funding, and operational support to help turn breakthrough science and technology into real-world impact. Role overview The Chief Growth Officer (CGO) will lead The Engine through its next phase of growth. This executive shapes partnership strategies, drives revenue initiatives, and works to strengthen the organization’s market position. The CGO also serves as a strategic advisor to the CEO and leadership team, providing input on key organizational decisions. Who should apply Experienced leaders with a background in Tough Tech, either as entrepreneurs or commercial executives Individuals with a track record of scaling organizations and launching first-of-a-kind (FOAK) projects Candidates who have advocated for Tough Tech founders and engaged with the broader ecosystem Location This position is based in Cambridge.

Collaboration Fuels Our Innovation. Roku is Transforming Television ViewingAs the leading TV streaming platform across the U.S., Canada, and Mexico, Roku aims to revolutionize how viewers engage with their televisions globally. Pioneering the concept of streaming, our mission centers on creating a cohesive TV ecosystem that connects viewers to their preferred content, empowers content creators to build substantial audiences, and offers advertisers unprecedented engagement opportunities.From day one at Roku, your contributions will be valued, as we are a dynamic public company that thrives on your active participation. Join us to delight millions of global streamers while gaining invaluable experience across diverse disciplines. About the RoleIn the role of Senior Software Engineer, Android on the Roku Mobile App team, you will influence how millions of users interact with their Roku Streaming Devices. Your focus will be on developing intuitive, robust, and high-performance Android applications that enable users to manage their Roku devices seamlessly from TVs to Players and beyond.This position allows you to work with a cutting-edge tech stack, including Kotlin, Compose, and Google's latest frameworks. You will collaborate closely with design, product, and cross-functional engineering teams to innovate features, enhance performance, and streamline smart home interactions.We seek individuals driven by curiosity and initiative, who are excited to take ownership of features while fostering a collaborative team environment. About the TeamYou will become part of a talented, high-performing team known for delivering outstanding results. We are searching for someone who can help us maintain this momentum and continue producing high-quality applications as we expand.Given our global user base, we have built a reputation for products that function seamlessly right out of the box. This success is intentional, as we are dedicated to ensuring our products are not only intuitive but also obvious to use. What You’ll Be Doing

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.