Senior Mobile Engineer at Relay | London

Join Relay, a pioneering force in the evolution of online logistics. With a historic Series A funding round of $35 million, led by Plural, a notable deep-tech investor, Relay is outpacing 99.98% of venture-backed startups. We are building an exceptionally talented team, setting new standards in the logistics sector.Our Mission is to eliminate friction in commerce. High delivery costs are a hidden barrier to e-commerce, influencing what can be sold online and who can participate in the market. We aspire to create a world where goods flow freely among people, ensuring a seamless and inclusive online shopping experience.Our Team consists of approximately 110 members, with over half dedicated to engineering, product, and data roles. We boast 45+ advanced degrees in disciplines such as computer science, mathematics, and operations research. With thousands of data points meticulously captured and analyzed for each parcel, we cultivate a culture of first-principles thinking, robust feedback loops, and a commitment to experimentation.Collaborate with Industry ExpertsDiego Protas – Director of EngineeringDiego specializes in distributed systems and hardware architecture, integrating physical computing with scalable enterprise infrastructure. With experience leading over 170 engineers at Mercado Libre and driving large-scale ML-based inference at Meta, Diego’s dynamic leadership at Relay is setting new benchmarks for speed and reliability.Technical EnvironmentUtilizing Python, Rust, and TypeScript to ensure we employ the best tools for our projects.Developing cross-platform Flutter applications with a focus on exceptional user experience.Operating in a cloud-native environment on GCP, leveraging BigQuery and Cloud Run.Engaging in extensive ML modeling and LLM inference as part of our daily operations.Integrating emerging technologies, including robotics and IoT functionalities.Your Role as a Software Engineer at Relay includes:Taking ownership of complex engineering challenges.

Relay is revolutionizing the logistics landscape for the digital age. With a record-breaking $35M Series A funding, the largest in European logistics history, and support from innovative investors like Plural, Relay is outpacing 99.98% of its venture-backed peers. We are on a quest to build the most skilled team the logistics industry has ever seen.Our Mission is to eliminate friction in commerce. Currently, exorbitant delivery costs serve as a hidden barrier to online shopping, shaping what can be sold online and who can engage in it. We aspire to create a world where more goods can move freely among more people, enhancing the online shopping experience for all.THE TEAM• Comprising approximately 110 professionals, with over 50% in engineering, product, and data roles.• Home to 45+ advanced degrees in fields like computer science, mathematics, and operations research.• We analyze thousands of data points for every parcel we handle.• Our culture thrives on first-principles thinking, rapid feedback, and continuous experimentation.The OpportunityAt Relay, our operations are driven by data that informs the journey of every parcel, from entry into our system to delivery at the customer's door. Our data infrastructure supports real-time operational decisions, strategic insights, and networks of autonomous AI systems.We are seeking a Senior Analytics Engineer to join our Last Mile squad, which is our largest and data-richest team. Your contributions will be vital to enhancing key workflows that drive our Last Mile marketplace.This is an exciting time to join as we rapidly expand our network across the UK.Who Will Succeed in This Role?Design and Develop Core Data Models - Collaborate with engineers and business leaders within the Last Mile squad to create and implement foundational data models that support analytics, data science, and AI workflows.Establish Foundations for Key AI Systems - As our Last Mile marketplace grows increasingly intelligent, you will play a crucial role in managing the inputs that drive these systems.Ensure Data Quality - Implement robust testing, monitoring, and alerting mechanisms to maintain high data integrity across our systems.

Relay is revolutionizing the logistics landscape in the digital age. With a groundbreaking Series A funding round of $35 million, backed by leading deep-tech investors including Plural, Relay is outpacing 99.98% of venture-backed startups. Our mission is to build the most skilled team the logistics sector has ever seen.Our Mission is to eliminate friction in commerce. High delivery costs are an unspoken barrier to e-commerce, influencing what products can be sold online and who gets to participate. We strive for a future where goods can move freely among people, enhancing the online shopping experience for everyone.Our Team• Comprising approximately 110 professionals, with over half specializing in engineering, product, and data• Home to 45+ advanced degrees in fields such as computer science, mathematics, and operations research• We analyze thousands of data points for every parcel we manage• Our culture thrives on first-principles thinking, rapid feedback, and constant innovation.Collaborate with Industry ExpertsDiego Protas – Director of EngineeringDiego is a specialist in distributed systems and hardware architecture, blending physical computing with large-scale enterprise infrastructure. Previously, he led teams of over 170 engineers at Mercado Libre and managed extensive ML-based functions at Meta. At Relay, Diego's passionate leadership is pushing the limits of speed and reliability.Technology Stack HighlightsUtilizing Python, Rust, and TypeScript - we prioritize simplicity while selecting the right tools for the taskDeveloping cross-platform Flutter applications with a strong emphasis on user experienceOperating in a cloud-native environment on GCP, leveraging BigQuery and Cloud Run extensivelyEmploying ML modeling and LLM inference as a standard practiceIntegrating emerging technologies, including robotics and IoT-driven operationsYour RoleWork closely with enterprise clients during onboarding to ensure comprehensive technical success: integration, data quality assurance, metrics alignment, and ongoing support.

Role overview relay is hiring an Operations Manager for its London Sort Centre. This on-site role focuses on improving operational efficiency and keeping daily activities running smoothly. What you will do Lead and manage a team at the London Sort Centre Streamline processes to improve performance Support the achievement of operational targets and goals

Relay is at the forefront of transforming the logistics landscape in the digital age. With a remarkable backing of $35M from Europe's largest logistics Series A funding, led by pioneering investors like Plural, which boasts a diverse portfolio from fusion energy to space exploration, Relay is rapidly scaling, outpacing over 99.98% of venture-backed startups. We are curating an exceptionally talented team, setting a new standard within the logistics sector.Our Mission at Relay is to eliminate barriers to commerce. The current high delivery expenses serve as an invisible burden on e-commerce, influencing what products can be sold online and restricting participation. We aspire to create a future where goods flow freely among individuals, ensuring that the online shopping experience is effortless and accessible for all.Join Our Team• A dynamic team of ~110 individuals, with over half specializing in engineering, product development, and data analysis.• Over 45 advanced degrees in fields such as computer science, mathematics, and operations research.• We handle thousands of data points for each parcel, employing rigorous analysis and predictive modeling.• An intellectually stimulating environment characterized by first-principles thinking, rapid feedback loops, and constant experimentation.The OpportunityWe are seeking a Business Operations Lead—a proactive individual contributor role tailored for a hands-on operator. Reporting directly to Relay’s executive leadership, you will own high-context, cross-functional initiatives; enhance operational clarity and drive momentum; and facilitate critical decisions that may otherwise stagnate.This role emphasizes governance, reporting, and cross-team coordination, but it is fundamentally an operational position—distinct from project management. Your success will be gauged by practical execution and measurable outcomes, rather than plans, rituals, or status updates.As the Business Operations Lead at Relay, your responsibilities will include:Leading complex, cross-functional initiatives that span Delivery Squads, Commercial, Finance, and Operations. You will engage in cross-functional projects, consolidate information, and drive execution to completion.Serving as the initial point of contact for urgent, high-stakes Commercial or partner inquiries, performing root-cause analysis and delivering clear recommendations and trade-offs.Facilitating clarity in decision-making across the organization, ensuring that changes in tools and dashboards are well communicated and understood.

Join Relay in Revolutionizing Logistics!At Relay, we are fundamentally transforming the way goods are transported in the digital age. With the backing of Europe’s largest logistics Series A funding ($35M) from visionary investors like Plural—whose portfolio ranges from fusion energy to space exploration—we are growing at an unprecedented pace, surpassing 99.98% of venture-backed startups. We are building an exceptionally talented team that is setting new benchmarks in the logistics sector.Our Mission is to eliminate barriers to commerce. Currently, high delivery costs function as a hidden tax on e-commerce, dictating what can be sold online and who can engage in this space. We aspire to create a world where goods move freely among people, ensuring a seamless and accessible online shopping experience for all.The Team• A dynamic team of approximately 110 individuals, over half of whom are in engineering, product, and data roles.• Home to 45+ advanced degrees in fields such as computer science, mathematics, and operations research.• Handling thousands of data points for each parcel we manage, with extensive calculations, analyses, and predictions.• A culture that thrives on first-principles thinking, rapid feedback loops, and relentless experimentation.Your OpportunityAt Relay, our network generates data at every interaction—couriers, routes, parcels, sortation, pricing, and demand signals. This data serves as the foundation for every decision we make, especially as we increasingly integrate AI systems for autonomous decision-making.As the Head of Data Platform, you will oversee the infrastructure that transforms raw data into actionable insights. This includes managing the transformation layer (dbt), the semantic layer (Cube), the pipelines that supply them, and the standards that ensure the output is reliable. You will be tasked with ensuring data readiness for human analysts, dashboards, machine learning models, and autonomous agents.This is a pivotal leadership role where you will inherit a high-performing engine. The platform currently supports critical decision-making across all departments, backed by a robust dbt architecture and a semantic layer with strict naming conventions. Your mission is to elevate this 'V1' success into a world-class platform that remains the ultimate source of truth as our complexity scales.You will lead a team of dedicated data and analytics engineers who possess deep technical expertise and take great pride in their work. They are autonomous and have a clear vision of excellence. What they need is a leader who can...

Relay is revolutionizing the logistics landscape in the digital age. With a remarkable backing of $35 million from Europe’s largest logistics Series A round, spearheaded by forward-thinking investors such as Plural, Relay is outpacing 99.98% of venture-backed startups. Join us in building a highly skilled team that is setting new standards in the logistics industry.At Relay, our mission is to eliminate friction in commerce. High delivery costs are an unrecognized burden on e-commerce, influencing what products can be sold online and who can engage in the space. We aspire to create a world where goods can flow freely among people, thus ensuring a seamless and inclusive online shopping experience.THE TEAM• A dynamic group of ~110 individuals, with over 50% specializing in engineering, product, and data• A collective of 45+ advanced degrees in fields such as computer science, mathematics, and operations research• We handle thousands of data points for every parcel, employing them to enhance our service• A culture that thrives on first-principles thinking, continuous feedback, and rigorous experimentation.Your RoleIn this pivotal, hands-on role, you will be entrusted with the security, reliability, and scalability of Relay’s internal technology systems.As our Internal IT & Systems Lead, you will oversee device management, onboarding and offboarding processes, internal tools, and technical support. You will implement an MDM system, maintain a comprehensive asset register, ensure robust insurance coverage, enforce security best practices (including two-factor authentication), and support ongoing compliance requirements using tools like Vanta.You will be the primary owner of internal technical services, aiming to minimize ad-hoc requests, enhance documentation and processes, and guarantee that every employee possesses the necessary tools and support to operate effectively as the company grows.Ideal CandidatesPossess extensive experience in IT operations, internal systems, or workplace technology.Demonstrate confidence in implementing and managing MDM and device compliance.Exhibit strong organizational skills and a passion for asset tracking, logistics, and documentation.Take security seriously, driving initiatives related to 2FA, training, and compliance.Possess excellent communication skills and a collaborative mindset.

Relay is revolutionizing the logistics landscape in the digital age. Proudly supported by Europe's largest logistics Series A funding of $35M, spearheaded by innovative investors like Plural, who are involved in pioneering fields such as fusion energy and space exploration, Relay is experiencing rapid growth, outpacing 99.98% of all venture-backed startups. We are committed to creating a team filled with extraordinary talent, the likes of which the logistics industry has never seen.Our Mission is to eliminate friction in commerce. In the current landscape, soaring delivery costs serve as an unrecognized barrier for e-commerce, influencing what products are available online and who can engage in the market. Our vision is a world where goods flow freely among individuals, ensuring a seamless and inclusive online shopping experience for everyone.About Our Team• A diverse group of approximately 110 members, with over 50% specializing in engineering, product, and data roles.• Home to 45+ advanced degrees in fields such as computer science, mathematics, and operations research.• We analyze and predict thousands of data points for every parcel we manage.• Our culture thrives on first-principles thinking, rapid feedback loops, and a spirit of relentless innovation.Technology Stack HighlightsCloud-native infrastructure on GCP, utilizing BigQuery and Cloud Run extensively.Heavy reliance on machine learning modeling and LLM inference - this is a core part of our operations.Programming languages include Python, Rust, and TypeScript - we prioritize simplicity and choosing the right tools.Development of cross-platform Flutter applications, with a strong focus on user experience.Integration of emerging technologies, including robotics and IoT in our operations.The OpportunityAlthough we are not currently hiring for Data Science roles, we recognize that establishing a top-tier delivery system will necessitate outstanding data talent. By applying here, you will become part of our Data Science Talent Pool, and we will reach out when suitable positions become available.This is an excellent opportunity to express your interest early and maintain a connection with us as we expand.Who Thrives in This Role?A robust background in statistical modeling, machine learning, operational research, and experimentation.Curiosity and a drive for continuous learning and improvement.

Relay is revolutionizing the logistics landscape. With the backing of Europe’s largest logistics Series A funding of $35M, spearheaded by innovative deep-tech investors Plural, Relay is outpacing 99.98% of venture-backed startups. We are curating a highly skilled team that is setting new benchmarks in the logistics industry.Our Mission at Relay is to eliminate friction in commerce. We recognize that exorbitant delivery costs serve as a hidden barrier to e-commerce, limiting market participation and product offerings online. Our vision is to create a world where goods can traverse boundaries with ease, enhancing accessibility and convenience for all consumers.About Our Team• A dynamic group of approximately 110 professionals, with over 50% specializing in engineering, product development, and data science.• Our team boasts 45+ advanced degrees in disciplines including computer science, mathematics, and operations research.• We manage thousands of data points for each parcel we handle, harnessing analytics for informed decision-making.• Our culture thrives on first-principles thinking, rapid feedback cycles, and a commitment to continuous experimentation.Role OverviewAs a Senior Data Scientist within the Network squad, you will play a pivotal role in enhancing our forecasting engine, which is essential for operational efficiency. Your contributions will directly influence critical decisions across multiple teams at Relay. You will collaborate with fellow Data Scientists and Analysts, leveraging diverse expertise to tackle challenges in demand forecasting, expansion modeling, parcel intelligence, and sortation predictions. Your specific domain focus will align with your strengths and the squad's priorities.Your responsibilities may include developing models that guide Relay's expansion strategies, determining optimal new locations, forecasting parcel dimensions for effective routing and logistics, and refining our operational models to ensure cost efficiency across the network.

Relay is revolutionizing the logistics landscape for the digital age. With backing from Europe’s largest logistics Series A fundraising of $35 million, led by visionary investors Plural, Relay is scaling at an unprecedented rate, outpacing 99.98% of venture-backed startups. We are building an exceptionally talented team, poised to redefine the logistics industry.Relay’s Mission is to eliminate barriers in commerce. Today, exorbitant delivery costs serve as an unrecognized tax on e-commerce, dictating what products can be sold online and limiting access for many. We aspire to create a world where goods move freely among individuals, enhancing the online shopping experience for everyone.THE TEAM• A dynamic group of approximately 110 professionals, with more than 50% engaged in engineering, product design, and data analytics.• Over 45 advanced degrees in fields such as computer science, mathematics, and operations research.• Handling thousands of data points meticulously captured, calculated, and analyzed for every parcel.The OpportunityPlease note: This is a night shift position.As the Night Shift Manager at Relay, your responsibilities include:Supervising sortation operations during your shift to ensure performance targets are consistently met.Assisting in the recruitment, onboarding, and training of site operatives.Inspiring, leading, and coaching your team to achieve high-performance standards.Maintaining and enhancing health & safety standards.Identifying opportunities to enhance efficiency and service quality.Collaborating with stakeholders to ensure the overall success of the site.Who Will Excel in This Role?Demonstrated experience in a fast-paced operational or warehouse setting.A proactive leader with exceptional communication and team-building capabilities.Ability to think critically, resolve problems, and make informed decisions in high-pressure situations.Comfortable utilizing data to track performance and implement improvements.

Senior Software EngineerBecome a key player in our mission to revolutionize the shopping and dining experience, where innovation, impact, and growth are at the forefront of everything we pursue. Our Engineering teams tackle intricate technical challenges across a global, three-sided marketplace, constructing and scaling systems that cater to millions of customers, riders, and partners daily.From real-time logistics to robust infrastructure and marketplace optimization, we design, build, and operate technology that fuels Deliveroo’s expansive growth.We seek a Senior Software Engineer to join our London (Hybrid - 3 days from the office) team. In this pivotal role, you will enhance code structure and architecture while leading project planning to maximize efficiency and reliability across our production systems.Familiarize yourself with our Engineering team — discover what motivates us, our work culture, and what you can anticipate.Your ResponsibilitiesHere’s what your day-to-day might encompass:Pursue Technical Excellence: Refine code structure and architecture within your team’s domain, conducting impactful code reviews to ensure quality and scalability.Steer Project Planning: Anticipate dependencies and risks, collaborating closely with Product and Design to ensure seamless delivery of complex features.Enhance Operations: Streamline the maintenance and operation of production systems, fostering visibility, health, and operational readiness.Collaborate & Influence: Cultivate relationships across engineering teams to uncover collaboration opportunities and influence the broader technical roadmap.Mentor & Recruit: Facilitate the personal development of your colleagues through technical mentorship and actively participate in engineering interviews to expand our team.Desired QualificationsOur ideal candidate will bring robust expertise in several of these areas and a willingness to grow in others:Solid Engineering Principles: A strong commitment to crafting readable, well-designed, and thoroughly tested software.Backend Proficiency: Extensive experience in developing web-based applications (we utilize Go, Ruby/Rails, Python, Scala, and Rust).Data Proficiency: Familiarity with data handling and optimization techniques.

We are seeking an experienced Senior Software Engineer to join our innovative team at AECOM in London. In this role, you will be responsible for designing, developing, and implementing software solutions that meet client needs. You will collaborate with cross-functional teams to deliver high-quality products and improve our software development processes.

About Us Welcome to Zopa! Since our inception in 2005, we have pioneered the peer-to-peer lending landscape, and in 2020, we proudly launched Zopa Bank. Our mission is to revolutionize the banking experience by actively listening to our customers and addressing their financial concerns. We are committed to creating a banking ecosystem that prioritizes our customers’ needs, enabling them to reach their financial aspirations. Discover more about our innovative services at Zopa.com!Our accolades speak volumes; we not only receive industry awards but have also been recognized as one of the top three Most Loved Workplaces in the UK.If you are passionate about tackling unconventional challenges, thinking outside the box, and making a significant impact in the financial space, Zopa is the place for you. Join us and be part of something remarkable! Follow our journey on Instagram @zopalife.Your Engineering ChallengeAs a Senior Software Engineer, you won't just be writing code; you'll be tackling real financial challenges faced by millions. You will design and implement distributed systems that handle thousands of transactions each day, develop robust services to manage financial data, and simplify complex financial products to enhance user experience.

Relay is revolutionizing the way goods are transported in the digital age. With the backing of Europe’s largest logistics Series A funding round ($35M) led by innovative deep-tech investors at Plural (known for their investments in fusion energy and space exploration), Relay is experiencing unprecedented growth, outpacing 99.98% of venture-funded startups. We are building the most talented team in the logistics sector.Our Mission is to eliminate friction in commerce. The high costs associated with delivery currently function as a hidden tax on e-commerce, restricting what can be sold online and who can engage in the marketplace. Our vision is to create a world where goods flow freely among people, enhancing the online shopping experience and making it accessible to everyone.About the Team• A dynamic team of approximately 110 professionals, with more than 50% in engineering, product, and data• Over 45 advanced degrees in fields such as computer science, mathematics, and operations research• We gather and analyze thousands of data points for every parcel we manage• A culture that thrives on first-principles thinking, rapid feedback, and continuous experimentationOur VisionOur objective is to remove barriers in commerce. Delivery should feel seamless—where free shipping is the norm and logistical obstacles fade from consumers' minds.In this envisioned future:Consumers perceive delivery as invisible—where logistical challenges are eliminated.Retailers of all sizes flourish online, whether selling a £5 item or a £500 item, as delivery becomes universally efficient.Just as the internet has simplified communication, Relay aims to simplify the movement of goods, fostering new opportunities for both merchants and consumers.The OpportunityWe are seeking a Senior Associate in Strategic Finance to join Relay’s Finance team. You will collaborate closely with senior leaders, including the CFO and CCO, playing a crucial role in preparing Relay for a significant Series B funding round in 2026 while enhancing the analytical and operational framework of the organization.

Join Aircall, a leading unicorn in the customer communications sector, revolutionizing the way businesses connect with their customers. Our AI-powered platform, trusted by over 22,000 companies globally, integrates voice, SMS, WhatsApp, and AI into a single cohesive workspace, enhancing revenue generation, expediting issue resolution, and empowering customer-facing teams.At Aircall, we believe in working smarter, not harder. Our AI Voice Agent automates routine calls, AI Assist simplifies post-call tasks, and AI Assist Pro offers real-time support, enabling teams to perform at their best. This innovation leads to increased revenue, quicker resolutions, and scalable teams.Headquartered in Paris, with a robust presence in North America centered in Seattle, Aircall has teams across various cities including Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. We have crafted a beloved product and a rapidly growing business, supported by top-tier investors and driven by swift AI advancements across our offerings.At Aircall, you will become part of a dynamic and ambitious organization, where product excellence and execution are paramount. We prioritize swift decision-making, visible impact, and genuine growth.Our Work Culture: We are dedicated to our customers, rely on data-driven insights, and are focused on delivering impactful results. We value responsibility, continuous learning, and thoughtful speed. If you thrive in a collaborative, fast-paced environment where trust and impact are essential, you'll fit right in.We are seeking a motivated and passionate Senior Software Engineer to join our expanding engineering team and contribute to our innovative projects.In this role, you will be responsible for the design, development, deployment, and operation of critical features that enhance customer satisfaction. You will focus on operational excellence, metrics, observability, and best practices while mentoring your peers within the engineering team.With a commitment to quality, excellence, and agility, you will help elevate our delivery processes. Utilizing a NodeJS and Typescript back-end stack hosted on AWS, you will ensure that our solutions meet the highest standards.

Join Our Team!Are you an innovative Senior Software Engineer looking to make a significant impact? At Perk, we are redefining the landscape of travel and spend management with our intelligent platform. Our mission is to eliminate the tedious manual tasks that hinder productivity, allowing professionals to focus on what truly matters.Since our establishment in 2015, we've grown to serve over 10,000 companies globally, including renowned names like Wise, On Running, and Breitling. Our cutting-edge tools streamline everything from travel bookings to expense management, addressing a staggering $1.7 trillion problem of lost productivity.With a vibrant workforce of over 1,800 talented individuals across 12 offices, we are committed to fostering innovation and enhancing workplace culture. We believe in the power of curiosity, purpose, and teamwork, and we want you to be part of our journey to transform how businesses operate.

Join our innovative team at Faculty as a Senior Software Engineer. In this role, you will leverage your technical expertise to design, develop, and maintain software solutions that drive our mission forward. You will collaborate with cross-functional teams to deliver high-quality products that meet the needs of our clients.The ideal candidate is passionate about technology, possesses strong problem-solving skills, and has a proven track record in software engineering. If you thrive in a fast-paced environment and want to make a significant impact, we want to hear from you!

About the Role Strideup is hiring a Senior Software Engineer in London. This position focuses on building and improving software products that support business goals and deliver a strong user experience. The work involves hands-on development and close collaboration with teams across different functions. What You Will Do Design and develop software solutions for new and existing projects Work with colleagues from various disciplines to deliver scalable applications Apply knowledge of programming languages and software design principles to solve technical challenges Contribute to project planning and help ensure successful delivery of features What We Look For Strong programming skills and experience with software design Ability to solve complex technical problems Comfort working collaboratively with cross-functional teams This role is based in London, England, United Kingdom.

Join our innovative team at unlikelyai as a Senior Software Engineer, where you will have the opportunity to develop cutting-edge solutions that push the boundaries of artificial intelligence. In this role, you will collaborate with a talented group of professionals, leveraging your expertise to optimize our software development processes and deliver high-quality products.