Software Engineer II - Android

About Tripadvisor The Tripadvisor Group is dedicated to connecting travelers with experiences that are truly worth sharing. Our mission is to be the world’s most reliable source for travel information and experiences. Using our innovative brands, advanced technology, and extensive capabilities, we link our global audience to partners through engaging content, travel insights, and dynamic marketplaces for accommodations, activities, dining, and various travel categories. Tripadvisor, Inc. (Nasdaq: TRIP) oversees a diverse portfolio of travel brands, including Tripadvisor, Viator, and TheFork. About the Role We are seeking a talented Software Engineer II (Android) to join our rapidly expanding mobile team. This position is available to candidates who are within a commutable distance (generally within 2–3 hours) of our office hubs in Oxford or London. We value a flexible work environment while cherishing meaningful in-person interactions for collaboration. Expect a remote-first working model with occasional in-person gatherings at your nearest office for team alignment, planning, and other significant events. At Tripadvisor Experiences, we foster a friendly and engaging atmosphere where our primary goal is to accomplish tasks effectively. Our engineers collaborate closely with product managers and designers, engaging in every stage of the development process from design to deployment and feedback. Most of our engineers are involved in releasing code to production every few days, supported by a daily release cycle. What You'll Do As a member of Tripadvisor Experiences, our engineers are adaptable problem-solvers ready to tackle a variety of technical challenges. This full-stack role primarily focuses on Android development, with opportunities for backend projects as well. You don’t need to be an expert in every area; if you’re enthusiastic about learning, we’ll provide the support you need to enhance your skills. Our technology stack includes Kotlin, Coroutines, Jetpack Compose, Cursor, and GraphQL, organized in a modular layout following the clean architecture principles with MVVM. Write code! Our engineers prioritize their passion for coding and do what they excel at. Engage with code at all levels – while the primary focus is on app development, you will also have chances to work on backend microservices. Collaborate closely with Product and Design teams to create user-centric solutions.

Senior Android Software EngineerAt Deliveroo, we are on a mission to revolutionize the shopping and dining experience, powered by our commitment to impact, innovation, and growth. Our Engineering teams face complex technical challenges in a global, three-sided marketplace, creating and enhancing systems that serve millions of customers, riders, and partners every day.From real-time logistics to robust infrastructure and marketplace optimization, we design, build, and maintain technology that fuels Deliveroo’s expansive growth.We are seeking a Senior Android Software Engineer to join our dynamic team in London. In this role, you will contribute to the development and scalability of our top-tier mobile applications, ensuring an uninterrupted and high-performance experience for our diverse user base. This position is based in our London office with a hybrid work arrangement, typically requiring three days in the office.Explore our Engineering team to learn about what motivates us, our collaborative work environment, and what you can expect from us.Your ResponsibilitiesAs a member of the Consumer Tech team, you will focus on the complete customer journey—from the moment they launch the app to when their meal arrives—ensuring each interaction is seamless, quick, and dependable.Your daily activities will include:Lead technical execution by designing, developing, and scaling Android applications that manage complex, real-time interactions on a global scale.Enhance architectural frameworks and conduct code reviews to ensure the maintainability, visibility, and operational health of our mobile codebase.Collaborate with cross-functional teams (PMs, Experience Designers) to plan projects, guide technical decisions, and influence the team’s roadmap.Take ownership of large-scale features from conception to delivery, streamlining maintenance and ensuring operational readiness across our production systems.Foster the development of team members by mentoring peers, promoting efficiency, and actively participating in the engineering hiring process.What We’re Looking ForThe ideal candidate will possess substantial expertise in several of the following areas, with an eagerness to expand their knowledge in others:Extensive experience in developing Android applications, showcasing a robust understanding of the platform and its ecosystem.

Join Freetrade as a Mid-Level Android EngineerAt Freetrade, our mission is clear: to simplify investing and make it accessible for everyone. For too long, investing has been an intricate and costly endeavor, preventing millions from maximizing their savings. We're here to change that narrative.As we expand our team, we are on the lookout for individuals passionate about transforming how our customers invest and build their wealth. If you thrive on tackling complex challenges and are eager to develop innovative products, you will find your place with us.With an exciting year ahead, 2026 marks a significant milestone for us. Following our landmark partnership with IG Group, we will maintain our independence while benefiting from the support of an established leader in the industry.This year, we are accelerating our development plans and enhancing our product offerings, introducing features such as mutual funds, bonds, and family investment tools. Additionally, we are exploring the integration of AI to elevate our customers' experience.If you are eager to expand your technical expertise, contribute to innovative products, and work in a dynamic environment that embraces creativity and experimentation, this opportunity is tailored for you!Why Join Our Engineering Team?Become a vital part of a forward-thinking team that is redefining the investment landscape. As an engineer, you will be instrumental in developing and maintaining a resilient, scalable platform utilized by thousands daily. We address complex technical challenges, foster innovation, and create impactful solutions. Your code will not just operate; it will influence investment decisions across the UK.The Freetrade Android mobile application empowers customers to explore investment opportunities across the UK, US, and EU financial markets.We are seeking a skilled Android Mobile Engineer to join our dynamic team.The ideal candidate will possess a solid understanding of the Android mobile platform, demonstrate problem-solving abilities, and have a strong desire to enhance their skills within a collaborative team environment.This is a unique chance to collaborate with experienced mobile engineers across iOS and Android, fostering the development of your skills.As part of our dedicated mobile engineering team, you will implement new features and ensure high levels of customer satisfaction by addressing queries and feedback. Collaborating with design, product, and QA teams, you will craft exceptional user experiences that delight our customers.

Role overview flohealth seeks a Senior or Lead Android Engineer based in London. The role focuses on developing and enhancing mobile apps that support users in managing their health. This position combines hands-on Android development with technical leadership responsibilities. What you will do Collaborate with designers, product managers, and fellow engineers to deliver new Android features and improvements Design, develop, and maintain Android applications, emphasizing usability and strong performance Influence technical decisions and contribute to the architecture of both new and ongoing projects Mentor junior engineers and share knowledge of best practices within the team Requirements Significant experience building and releasing Android applications Deep knowledge of Android frameworks and design patterns Comfort working collaboratively in cross-functional teams Background in mentoring or leading engineers is considered an advantage

Join SumUp as a Senior Android Engineer, where you'll play a pivotal role in developing our dynamic merchant-focused ecosystem. This is your chance to design and enhance high-impact solutions—such as Kiosks, Kitchen Display Systems (KDS), Customer Facing Displays (CFD), and POS peripherals—that support intricate retail and restaurant operations globally. In this position, you'll seamlessly integrate hardware and software, delivering exceptional experiences for millions of merchants and their clientele.Your Responsibilities:Lead the design and expansion of Android-based merchant solutions, specifically tailored for self-service Kiosks and specialized point-of-sale interfaces.Enhance and develop impactful features that elevate the experience for both merchants and consumers across a diverse range of products.Assist in our transition to Kotlin Multiplatform (KMP) to streamline business logic across various mobile platforms.Craft maintainable, accessible, and high-performing user interfaces utilizing Jetpack Compose.Enhance product reliability through the implementation of comprehensive testing frameworks and increased automated QA coverage for our hardware-integrated software.Work collaboratively with cross-functional teams to deliver integrated features that align with the requirements of global enterprise partners.Conduct code reviews, uphold architectural standards, and guide fellow engineers in the best practices for developing reusable UI components.

Motorway is looking for a Senior Android Engineer to join the team in London. This role centers on developing and refining mobile applications that help both the business and its users. Daily work brings close collaboration with designers, product managers, and fellow engineers to deliver reliable, user-friendly Android features. Key responsibilities Design, build, and maintain Android applications for Motorway Partner with cross-functional teams to launch new features and enhance existing ones Take part in architectural decisions, code quality discussions, and user experience improvements Collaboration and impact This position involves regular teamwork across disciplines, ensuring that the Android experience aligns with Motorway’s goals and user needs. Input on architecture and user experience is valued at every stage. Location The role is based in London.

About the Team Join SumUp's Mobile Platform Squad as a Senior Android Engineer and play a pivotal role in the development of our rapidly expanding Android ecosystem. With substantial investments in our flagship products, we empower our feature teams to create world-class experiences. You will be crucial in establishing a robust foundation that allows over 40 Android engineers to maximize their productivity and efficiency, directly influencing the future of mobile payments for millions of merchants. Our engineering culture promotes autonomy, collaboration, and innovation. Your contributions will have a significant impact, connecting mobile engineers across the organization. This role is vital for: Eliminating Bottlenecks: Strategically addressing and resolving critical bottlenecks in CI/CD pipelines and app infrastructure that may hinder the delivery of new features and enhancements. Enhancing Developer Experience: Designing and implementing state-of-the-art tools and infrastructure that markedly improve the developer experience, reduce build times, and streamline workflows for our extensive Android engineering team. Modernizing a Mature Codebase: Leading the evolution and enhancement of our Android codebase, with an emphasis on code simplicity, maintainability, and overall health across all SumUp Android products. Ensuring Product Stability & Scalability: Offering foundational support and guidance across our diverse Android product portfolio, ensuring consistency, reliability, and smooth operation for products such as Register, Android Terminal, SumUp Go, and the Merchant app. What You’ll Do: Strategic Impact: Lead initiatives to shape the core experience for both merchants and our internal Android developers, directly contributing to SumUp's ambitious Android product roadmap. Technical Leadership: Architect, develop, and maintain critical tools, frameworks, and infrastructure that significantly enhance the consistency, scalability, and reliability of our mobile applications, ensuring no adverse effects across our various Android products. Performance & Efficiency: Drive initiatives in CI/CD systems, advanced developer tooling, and performance optimizations to dramatically streamline mobile development processes and reduce build times for our expanding team. Codebase Evolution: Proactively address technical debt, enhance code health, and introduce best practices to a complex, mature codebase, ensuring its long-term viability.

Join Trainline as a Junior Android Engineer and embark on a journey to help revolutionize travel. As part of our dynamic team, you will be engaged in developing cutting-edge applications that enable millions to easily book and manage their travel. This role offers a fantastic opportunity to learn and grow within a supportive environment.

Join Runna as a Senior Software Engineer II, where you'll play a pivotal role in enhancing our software solutions. You will collaborate with cross-functional teams to design, develop, and implement robust applications that meet our customers' needs. Your expertise will help us push the boundaries of technology, ensuring our products remain at the forefront of the industry.

Join Us as a Mid/Senior/Staff Android Engineer in London!Relocation and visa support are available if required, but candidates must currently be located in the United Kingdom or Europe.Bring Your Best Work to LifeAt Trade Republic, we are Europe's leading savings platform, operating across 18 countries and serving over 10 million customers who have entrusted us with more than 150 billion in assets. Our mission is ambitious: to empower everyone to build wealth through easy, safe, and free access to financial systems.As part of our team, you will collaborate with top talents and cutting-edge technology, contributing to a positive and lasting impact for millions of users.Your Role and ResponsibilitiesLeverage your expertise to enhance the Android guild, ensuring technical excellence across the board.Mentor fellow engineers while receiving guidance from a coach to foster your professional growth.Take ownership of product development by collaborating with various roles to ensure quality and timely delivery.Thrive in a dynamic, goal-oriented agile environment.What We SeekA minimum of 5 years of experience in software engineering, preferably within the JVM ecosystem.Proven experience in developing and launching scalable features within a service-oriented architecture.A strong commitment to delivering reliable and maintainable software through iterative development and continuous delivery practices.Experience in building platform services that accelerate product development; prior experience in platform-focused teams is a plus.Our Android Tech StackNative Android application development using Kotlin.Reactive programming frameworks: RxJava2, Kotlin Flow.Architecture patterns: MVVM.Jetpack Compose for UI development.Dependency Injection with Anvil.Why You Should Apply TodayWe cultivate a culture of ownership, excellence, and high energy. We hold ourselves accountable to achieving impactful outcomes, tackling one of the biggest challenges facing Europeans today—closing the pension gap and democratizing wealth. If this resonates with you, we invite you to reach out!

Join our talented team to create the leading training platform for runners!At Runna, we empower everyday runners to excel by developing an exceptional app that offers world-class training, coaching, and a vibrant community for everyone—from improving 5k times to training for marathons.Our growth is remarkable! In November 2023, we secured a $6.5M funding round led by JamJar, with contributions from Eka Ventures, Venrex, and Creator Ventures. In 2024, we were honored to be one of three global finalists for the iPhone App of the Year by Apple, showcasing our innovation and impact. By 2025, we became part of Strava, further accelerating our journey!Our vision is ambitious: to be the premier global training platform for millions of runners worldwide. As we grow with intention, we seek individuals eager to contribute to something meaningful that leaves a lasting legacy. With the backing of Strava, now is an exciting time to be a part of our journey. The Team You'll JoinWe are in search of innovative, creative, and positive collaborators to become part of our skilled cross-functional engineering team. You will be part of the Train Team, collaborating closely with our modeling teams to integrate essential features aligned with Runna's mission, such as adapting plans for holidays and B races, supporting cutting-edge training plans, and enhancing in-app experiences using our AI/ML tools.You will partner with our CTO and engineering leadership to help shape the future of Runna, receiving unwavering support throughout this thrilling journey. Our roadmap is packed with opportunities to champion new technologies, tackle significant challenges affecting millions of runners, and enhance our existing architecture to elevate our engineering team.Your ResponsibilitiesDesigning, developing, testing, and delivering innovative features across the full stack.Collaborating with the Product team to determine the best solutions for optimal customer experiences.Working with modeling/AI engineers to design the architecture that interfaces between the Runna training engine and the Runna app.Providing technical support to team members as needed.Mentoring and coaching engineers in your team, offering guidance and code reviews while avoiding bottlenecks.

Join Our Team as a Senior Software Engineer IIAt Runna, we are assembling a skilled team dedicated to creating the premier training platform for runners. Our innovative app empowers everyday runners to achieve their best, offering world-class training, coaching, and community support for everyone from 5k enthusiasts to marathon first-timers.We are experiencing rapid growth! In November 2023, we successfully completed a $6.5M funding round led by JamJar, with contributions from Eka Ventures, Venrex, and Creator Ventures. Our app was recognized as one of three global finalists for Apple's iPhone App of the Year in 2024, showcasing the groundbreaking impact of our work. In 2025, we proudly joined the Strava family!Our goal is ambitious: to be the leading training platform for millions of runners worldwide. With our recent acquisition by Strava amplifying our mission, now is an exciting time to become part of something truly meaningful. Your Future TeamWe seek talented, innovative, and collaborative individuals to join our cross-functional engineering team. You will be an integral member of our newly formed Strength Team, collaborating with our modeling engineers and Team Strava to revolutionize strength training for athletes.You will work closely with our CTO and engineering leadership to shape the future of Runna, receiving support throughout this exhilarating journey. With a dynamic roadmap filled with opportunities, you will champion new technologies, solve meaningful challenges for millions of athletes, and enhance our existing architecture to elevate our engineering efforts.Your ResponsibilitiesArchitect, develop, test, and deploy new features across the full technology stack.Collaborate with the Product team to identify optimal solutions for an exceptional user experience.Partner with modeling and AI engineers to design the architecture that connects the Runna training engine with the Runna app.Provide technical assistance and mentorship to team members as needed.Guide and support fellow engineers through mentorship and code reviews, ensuring smooth workflows without bottlenecks.Contribute to operational efficiency by building and maintaining our development infrastructure.

Our Story Welcome to Zopa! Since our inception in 2005, we have pioneered the peer-to-peer lending space, and in 2020, we proudly launched Zopa Bank. Our mission is to reshape the financial landscape by prioritizing our customers' needs and preferences. We are dedicated to creating a banking experience that is accessible, empowering, and innovative. Discover more about our exciting offerings at Zopa.com! We celebrate our remarkable achievements, thanks to our incredible team. Recognized not just for industry accolades, we have also been named among the top three Most Loved Workplaces in the UK. If you thrive on tackling unconventional challenges, embrace innovative thinking, and are motivated by the desire to make a significant impact, Zopa is the place for you. Join us and make a difference! Want to see our journey? Follow us on Instagram @zopalife.About the TeamWe are on an exciting journey to enhance our mobile application, and we are seeking a talented individual to assist in developing our new Android app, utilizing Kotlin.As part of our Mobile Platform team, you will be instrumental in shaping the app's architecture, shared capabilities, libraries, core experiences, and analytics infrastructure. The team is a vital contributor to Zopa’s mobile community and plays a key role in advancing our mobile technology.With an aspiration to become Britain's leading bank, we have recently unveiled the Zopa Account — a highly engaging product aimed at the mass market. Our mobile app serves as the primary touchpoint for our customers, and it must be high-performing, dependable, and user-friendly. Therefore, we are investing significantly in the quality and evolution of our mobile technology.Currently, our app is developed using React Native, but we are progressively adopting native capabilities in Swift and Kotlin. We are in the midst of a comprehensive transformation of the Android experience, transitioning towards a more native approach, and we invite you to join us on this exciting journey.

Role overview Axon Enterprise, Inc. is seeking a Senior Software Engineer II to join its London office. This position centers on developing software that directly supports public safety and serves communities. Engineers at Axon play a key part in building solutions designed to grow and adapt alongside evolving needs. Key responsibilities Collaborate with engineers from diverse backgrounds to design and build software products Develop and enhance systems that assist public safety professionals in their daily responsibilities Share ideas and contribute code in a setting that values technical input and encourages new perspectives Work environment The engineering group values both initiative and teamwork. Creativity and practical problem-solving are woven into daily routines, and the team moves quickly to deliver results that matter.

Role overview The Trade Desk is hiring a Software Engineer II focused on Buying in London. This role centers on building and improving software that helps clients make smart advertising choices. The position works closely with teams from different disciplines to design, develop, and refine solutions for digital advertising. What you will do Partner with cross-functional colleagues to create and enhance software for advertising buying workflows Design and implement features that support client decision-making in digital advertising Contribute technical knowledge and fresh ideas to ongoing projects

Role overview Speechify is seeking a Tech Lead to join the Android Core Product team in London. This position involves leading a team of engineers and shaping the direction of core Android features. The work done by this group plays a key role in the evolution of Speechify’s product. What you will do Oversee the development of new features and ongoing improvements for Speechify’s Android app Mentor engineers and support their technical growth Maintain high coding standards and encourage best practices throughout the team Foster collaboration and creative problem-solving within the group Requirements Deep experience with Android development Background in leading or mentoring engineering teams Ability to set technical direction and maintain quality standards Interest in building products that make a difference, working closely with others Location This role is based in London, United Kingdom.

Join our innovative Client Platform team at Spotify, an R&D studio dedicated to enhancing the productivity of client developers. Our mission is to optimize performance and stability across the Spotify applications, ensuring that users enjoy an exceptional experience.We achieve this by offering advanced observability and tools that capture critical performance metrics and stability data, presenting it to feature squads in a clear and actionable format. Our collaborative approach involves working closely with internal stakeholders to comprehend their needs and create a platform that seamlessly integrates with their workflows. Occasionally, we partner directly with feature squads to implement our tools and pinpoint areas for improvement within the app.Currently, we are developing the next-generation observability platform that consolidates various client observations into a unified view, empowering engineers to diagnose issues in real-time, identify bottlenecks, and effectively address bugs and regressions.

Kaluza is hiring a Software Engineer II to help advance its Energy Intelligence Platform. This hybrid role can be based in London, Bristol, or Edinburgh. The team focuses on building scalable SaaS solutions for energy retailers, supporting the shift to cleaner, electrified systems. The salary range for this position is £46,000 to £60,000. Please note that visa sponsorship is not available at this time. Role overview This position reports to a Software Engineering Manager. The specific team and responsibilities will be shaped during the interview process, matching your experience to areas where you can make the most impact. The Talent Acquisition team will provide guidance throughout the process. What you will do Contribute to the Energy Retail platform, a SaaS product designed for energy retailers and decarbonization initiatives. Develop and enhance backend services with TypeScript and Node.js, focusing on reliable, event-driven systems at scale. Work closely with product managers, designers, and engineers to deliver features that address user needs. Take responsibility for specific services or components, supported by experienced colleagues. Write well-tested code, interact with databases, and use cloud technologies such as AWS. Help maintain stable production systems and participate in a culture of continuous improvement. About Kaluza Kaluza’s platform uses data, AI, and real-time decision-making to help energy companies manage complexity and deliver practical solutions. The company partners with organizations like OVO, AGL, ENGIE, Volvo, and Volkswagen, and operates globally, including a joint venture with Mitsubishi Corporation in Japan. Kaluza’s mission is to make clean energy reliable and affordable through predictive algorithms and human-centered design.

Join Spotify as a Senior Android Engineer within our innovative Data Platform team. In this role, you will leverage your extensive Android development experience to enhance our data services and deliver optimal user experiences. You will collaborate with cross-functional teams, including product managers and data scientists, to design and implement robust solutions that support our growing user base.

Join our dynamic team as a Reverse Engineer specializing in Mobile Software Security. In this role, you will leverage your expertise in reverse engineering and security analysis to identify and mitigate threats in mobile applications and operating systems. Your contributions will play a crucial role in enhancing the security posture of our clients.Key Responsibilities:Conduct intelligence analysis to identify and assess potential threats.Offer subject matter expertise to support various operational initiatives.Identify and evaluate new intelligence sources related to current and emerging technological threats.Skills and Expertise Required:Proficient in assembly language.Hands-on experience with Android applications and operating systems.A minimum of 3 years of relevant experience in reverse engineering and code-level security auditing, with a solid understanding of assembly language and the ability to unpack obfuscated code.Experience in both static and dynamic analysis of malicious binaries.Familiarity with Java programming.Strong analytical skills in security-related data analysis.Proficient with tools such as IDA Pro and OllyDbg.A robust foundation in security engineering, computer and network security, and authentication protocols.Qualifications:A Bachelor's degree in Engineering or a related field, or equivalent practical experience.