Mobile QA Engineer - Remote Opportunity

About Checkout.com Checkout.com powers digital payments for brands such as eBay, ASOS, Klarna, Uber Eats, and Sony. The platform handles billions of transactions each year, making payments simple for businesses and consumers alike. Headquartered in London, Checkout.com operates from 19 offices across six continents. The team values performance and continuous improvement, working together to shape the future of fintech. Role Overview The Senior Mobile Engineer will help design and build mobile products that reach millions of users. This role focuses on creating user-friendly and scalable mobile experiences, collaborating with engineers and product leaders to deliver high-quality solutions. Responsibilities include defining architecture, leading technical investigations, and building the systems that support Checkout.com’s consumer products. What You Will Do Design and develop mobile experiences used by a global audience. Lead feature development from planning through deployment and ongoing support. Work closely with backend teams to align system capabilities with mobile needs. Champion best practices in testing, monitoring, and release processes to strengthen product reliability. Mentor team members, review code, and help shape the long-term technical direction for mobile at Checkout.com. Location This position is based in London.

About Us SharkNinja is a global leader in product design and technology, offering a diverse range of highly rated lifestyle solutions that enhance the lives of consumers worldwide. With two trusted brands, Shark and Ninja, we are committed to delivering innovative products that disrupt markets and create significant growth. Headquartered in Needham, Massachusetts, we employ over 4,100 dedicated associates, and our products are available through key retailers and online platforms globally. About the RoleAt SharkNinja, we engineer intelligent, connected products that excite consumers and transform categories. Our engineering teams are expanding in Firmware, Cloud, and Mobile App development. We are building systems that integrate hardware, software, and digital experiences, leveraging AI to streamline design, coding, and testing processes.Join us in designing and delivering the next generation of SharkNinja products, including mobile applications that link consumers to their devices, full-stack architectures that provide seamless experiences, and cross-platform solutions that bring intelligence right to users' fingertips. You'll enhance our current SharkClean app platform while helping to shape a unified app ecosystem for all SharkNinja connected devices. Together, we are making our products smarter every day.What You'll DoCreate cross-platform solutions with React Native to expedite feature delivery for both iOS and Android.Collaborate closely with embedded systems, cloud, and hardware teams to provide comprehensive connected product experiences.Design and implement full-stack architectures that integrate mobile applications with cloud services and connected devices.Develop, execute, and automate tests to verify reliability, performance, and consumer-ready quality.Optimize mobile app performance for broad consumer deployment across diverse device environments.Engage with cross-functional development teams across the software stack from embedded systems to cloud services.

Join Relay, where we are revolutionizing the logistics landscape in the digital age. With the backing of Europe’s largest logistics Series A funding ($35M), spearheaded by forward-thinking investors like Plural, we are scaling at an unprecedented rate, outpacing 99.98% of other venture-backed startups. Our mission is to build an exceptionally talented team that will redefine the logistics industry.Our Vision: To eliminate barriers in commerce. High delivery costs currently act as a hidden burden on e-commerce, restricting what can be sold online and who can access it. We aspire to create an ecosystem where goods flow freely among people, ensuring a seamless shopping experience for everyone.About Our Team• Comprising approximately 110 professionals, over 50% of whom specialize in engineering, product, and data• 45+ advanced degrees in fields like computer science, mathematics, and operations research• Thousands of data points meticulously managed for each parcel that we handle• An intellectually stimulating culture driven by first-principles thinking, quick feedback loops, and continuous experimentation.Work with Industry InnovatorsDiego Protas – Director of EngineeringDiego possesses expertise in distributed systems and hardware architecture, integrating physical computing with large-scale enterprise infrastructure. His previous experience includes leading teams of over 170 engineers at Mercado Libre and executing extensive ML-based inference at Meta. At Relay, Diego infuses enthusiasm and hands-on guidance to set new standards in speed and reliability.Technology Stack OverviewCross-platform applications built with Flutter, emphasizing user experienceUtilizing Python, Rust, and TypeScript - we prioritize simplicity while employing the best tools availableCloud-native infrastructure on GCP featuring extensive use of BigQuery and Cloud RunRegular implementation of ML modeling and LLM inference - this is integral to our operationsInnovative tech integrations, including robotics and IoT-driven operationsYour ResponsibilitiesEngage across the full technology stack, from mobile applications to data infrastructure

About the Position Jane Street is on the lookout for a skilled Mobility/MDM Engineer with a robust background in mobile device management (MDM) and remote device solutions. In this pivotal role, you will be responsible for engineering, managing, and maintaining a rapidly expanding fleet of thousands of iOS and Android devices, ensuring they remain seamlessly connected to essential applications and services that are integral to our business operations. Your focus will be on enhancing, automating, and standardizing our fleet of corporate-owned and BYOD-managed devices, along with their supporting infrastructures. This involves crafting and maintaining PowerShell scripts, optimizing MDM systems, and collaborating with global teams to troubleshoot issues, deploy updates, and enhance systems in this dynamic and fast-paced field. Additionally, you will devise innovative solutions for business challenges and architect integrations that satisfy a range of stakeholder requirements. Strong communication and interpersonal skills are essential, as you will engage with colleagues across the firm worldwide to identify and resolve issues, plan and execute deployments, and improve existing systems whenever possible. Attention to detail and accurate record-keeping are critical in this role. You must possess excellent troubleshooting skills and be expected to document problem resolution processes resulting from thorough root cause analysis. This position is part of our IT Engineering group, which is a dedicated team that architects and manages a global physical, virtual, and mobile computing environment. Your analytical expertise will directly support our colleagues and ensure the highest standards of system performance.

Role overview Spotify is hiring a Senior Mobile iOS Engineer in London. The focus of this position is to build and enhance features for the iOS platform, shaping the listening experience for millions of users around the world. What you will do Design and implement new features for Spotify’s iOS app Collaborate with product, design, and engineering teams to deliver polished mobile applications Influence technical decisions that improve user experience and app performance Requirements Proven experience developing mobile applications for iOS Ability to work effectively with cross-functional teams Drive to create solutions that connect with a global audience Spotify Technology S.A. aims to unlock human creativity through the intersection of technology and music.

At Ripple Labs Inc., we envision a future where value can be transferred as effortlessly as information. Our mission is bold and transformative, and we are already making significant strides. With our innovative cryptocurrency solutions tailored for financial institutions, businesses, governments, and developers, we are enhancing the global financial landscape, fostering economic equity, and creating opportunities worldwide. Join us and collaborate with a team of dedicated professionals who support each other in achieving excellence.If you're eager to make a tangible impact and advance your career, we invite you to become part of our journey to create real-world value.Your RoleAs a Senior Mobile Software Engineer, you will contribute to Palisade, Ripple’s premier wallet-as-a-service platform. This platform empowers businesses, fintech companies, and banks to develop use cases in digital asset treasury, payments, and exchanges.

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.

About xAIAt xAI, our mission is to develop artificial intelligence systems that genuinely comprehend the universe, empowering humanity's quest for knowledge. Our compact team is driven, highly motivated, and committed to engineering excellence. We seek individuals who relish challenges and are fueled by curiosity. Operating with a flat organizational structure, we encourage every employee to engage hands-on and contribute significantly to our mission. Leadership opportunities are awarded to those who demonstrate initiative and consistently deliver outstanding results. Strong work ethics and effective prioritization skills are essential for success in our environment. Excellent communication skills are also vital, as all team members must share knowledge clearly and concisely with their peers.About the RoleWe are on the lookout for an outstanding iOS engineer to join our small yet impactful team, focused on developing one of the most valuable AI applications in the world based on its user impact. You’ll be instrumental in crafting innovative mobile experiences that merge technical finesse with product excellence. The ideal candidate will possess the following qualifications:

airapps is seeking a Mobile DevOps Engineer to help improve and automate the development and deployment of our mobile applications. This position is based in the London Metropolitan Area. Role overview This role focuses on building and maintaining automation for mobile app development. The Mobile DevOps Engineer will work closely with cross-functional teams to strengthen deployment pipelines and support reliable releases. What you will do Automate development workflows for mobile applications Enhance and maintain continuous integration and deployment systems Collaborate with engineers and other teams to improve system reliability Requirements Experience with mobile application DevOps practices Strong collaboration skills Ability to support automation and deployment pipelines

LocationLondon, UK - Hybrid – 3 days in office - Office location: Central London (Victoria area)About the RoleJoin our dynamic team as a Mobile/Frontend Engineer where you will leverage your expertise in React Native and TypeScript to enhance and develop a tablet-based Point of Sale (POS) application.This position is perfectly suited for individuals with a strong mobile development background grounded in frontend technologies. Most of our codebase is built using React Native, along with a bit of Next.js for our web interfaces.You will focus on elevating UI quality, optimizing performance, and crafting new features in a fast-paced startup setting where AI technology is an integral part of our development process.Key ResponsibilitiesDevelop and maintain features for our tablet-based POS applicationUtilize React Native and TypeScript extensivelyEnhance UI/UX quality and streamline the existing codebaseRefactor and optimize frontend code for improved performance and reliabilityCollaborate with product engineers and backend developersRapidly deliver new features while ensuring high standards of code qualityEffectively utilize AI-assisted development toolsRequired Experience & SkillsProven experience with React Native and TypeScriptBackground in frontend engineering (JavaScript, React ecosystem)Experience in developing mobile or tablet applications (excluding native Swift/Kotlin)Ability to enhance and maintain existing codebasesExperience in startup or fast-paced settingsAdept at rapidly iterating on product featuresPreferred QualificationsFamiliarity with Next.jsExperience in POS, payment systems, or fintech productsUnderstanding of AI-driven development workflowsExperience collaborating with product or design teamsWhat We ValueWe seek front-end engineers who are passionate about their craft and committed to delivering exceptional user experiences.

ABM Industries Incorporated is hiring a Mobile Installation Engineer to support electrical building services across client sites in London. The position is based at Pier Walk and involves working Monday to Wednesday, from 8:00 AM to 5:00 PM, for a total of 40 hours per week. Role overview This role centers on planned preventative maintenance (PPM) and repairs of mechanical and electrical systems. The engineer will help maintain high standards of service and building performance for ABM’s clients. Main responsibilities Complete planned and reactive maintenance assigned by the Site Supervisor and Contract Manager, including electrical and mechanical PPM, minor building repairs, plumbing, and drainage tasks. Update and close out completed tasks using the site PDA maintenance system. Maintain quality workmanship and help ensure efficient building operations. Coordinate with subcontractors for both planned and reactive maintenance when required. Follow all site protocols and health and safety procedures. Keep accurate records of site activities and completed work. Inspect service conditions, respond to call-outs, and handle repairs as needed. Provide on-call support for emergencies outside regular hours if required. Work safely in various building environments, including at height using platforms and ladders. All necessary access equipment and PPE are provided. Ensure ABM-issued tools are safe and well maintained. Support the team and contribute to the success of the contract. Comply with ABM’s health, safety, and environmental policies. Carry out other duties as directed by management. Additional expectations This position involves flexibility to work across multiple sites and with a range of clients throughout London. Compensation Salary: Competitive

Join Our Team at incident.ioAt incident.io, we are revolutionizing the way teams handle incidents with our cutting-edge AI incident response platform. Our mission is to empower teams to significantly minimize incident response times while enhancing overall reliability. By integrating on-call management, incident response tools, AI-driven Site Reliability Engineering (SRE), and status updates into one seamless platform, we enable teams to react swiftly, reduce downtime, and keep customers informed.Since our inception in 2021, we have proudly assisted over 1,500 organizations, including industry leaders such as Netflix, Airbnb, and Block, in managing over 500,000 incidents. Each month, thousands of engineers, product managers, and support teams leverage incident.io to restore services more efficiently, maintain alignment during challenging times, and focus on what truly matters: building exceptional products.We are an ambitious and rapidly growing team that is passionate about our customers, the quality of our products, and creating exceptional user experiences. With $100M in funding from notable investors such as Index Ventures, Insight Partners, and Point Nine, alongside contributions from seasoned founders and executives from leading tech companies, we are poised for significant growth.Your RoleWe are on the lookout for our inaugural React Native Product Engineer to spearhead the development of our mobile application for both iOS and Android. You will enjoy a broad scope of responsibilities and the freedom to influence various aspects, from architecture and tooling to user experience and the release process.This is a unique opportunity to join us at an early stage and contribute to building something impactful: a product that aids individuals during high-stakes situations, helping them regain control and manage pressure effectively.If you are passionate about craftsmanship, user experience design, and making a tangible difference, we would love to hear from you. Although your primary focus will be mobile, you will collaborate across the tech stack with product engineers, designers, and project managers, delivering solutions that impact thousands of users.

Join TransPerfect, a forward-thinking organization with a vibrant startup culture, as a Mobile Engineer specializing in Flutter. In this pivotal role, you will be instrumental in creating outstanding user experiences for both iOS and Android platforms. This full-time hybrid position encourages both independent and collaborative efforts within a dynamic team dedicated to delivering cutting-edge products.Your expertise in developing mobile applications using Flutter will be essential as you build new components and features from the ground up. You will be part of a team that values innovation and creativity, ensuring that our clients receive the best possible service through our technological advancements.About the Team: The TechOps team at TransPerfect has played a crucial role in our company's achievements over the last decade, streamlining processes for clients and colleagues alike. Our work ranges from enhancing workflows to developing core services that power our GlobalLink platform, all aimed at simplifying complex ecosystems for users.Your Responsibilities:Act as the subject matter expert on mobile app development, guiding the team in defining best practices, design thinking, and deployment processes.Collaborate closely with product managers, engineers, designers, and QA teams to create engaging user experiences on both iOS and Android platforms.Lead the delivery of significant mobile app features, components, and comprehensive application solutions in partnership with technical leads and senior engineers.Thrive in an agile environment while managing internal and external implementation requirements and expectations.Provide constructive feedback to technical staff throughout the software lifecycle to align development priorities with business objectives.Write clean, efficient, and maintainable code in accordance with best practices and coding standards.Stay informed on the latest trends, technologies, and best practices in mobile development.

LOCATION: Pier Walk, LondonSHIFT PATTERN: Monday to Friday, 8 AM - 5 PMSALARY: CompetitiveROLE OVERVIEW:As a Mobile Air Conditioning Engineer, you will leverage your expertise in air conditioning systems to conduct reactive fault diagnostics and installations that align with our company’s core services. Your responsibilities will encompass:Comprehensive commissioning and servicing of HVAC equipment, chillers, and associated air handling units.Assisting with warranty repairs when necessary.Generating reports and information sheets in compliance with the company’s quality standards to communicate the quality and performance of installations.Collaborating with contract staff to ensure alignment with agreed contract terms.Producing technical documentation related to non-commissioning tasks as needed.Upholding health and safety standards on-site, following method statements and risk assessments.Coordinating with contract managers for material deliveries and collections.Providing support with service, maintenance, and warranty tasks during sporadic commissioning workloads.Promoting the company’s after-sales service and maintenance divisions.Reporting site issues to the contract manager that may hinder contract completion or customer satisfaction.Performing additional tasks as required to meet company objectives. Note: This list is not exhaustive and may evolve over time.Flexibility to work across various sites with diverse clients.Participating in on-call duties for emergency site responses outside of regular hours.KEY RESPONSIBILITIES:Accurately completing and submitting a weekly timesheet to your line manager.Submitting weekly expenses with all necessary receipts.Finalizing all required paperwork for customers on-site to facilitate timely invoicing.Providing detailed descriptions of any additional work needed on engineer’s worksheets.Completing minor works and installation certificates upon the conclusion of electrical installations or modifications.Contacting your line manager or office administrator at the end of each job for updates.

Join Zopa as a Senior Product Manager for our Mobile Application team and play a pivotal role in shaping our product strategy. You will lead cross-functional teams to deliver innovative solutions, enhance user experiences, and drive product improvements. Your expertise will be crucial in identifying market opportunities and defining product roadmaps that align with our business goals.

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.

About the RoleJoin us at SumUp, where our mission is to connect merchants and consumers, fostering the growth of local communities. With SumUp Pay, we are revolutionizing the banking experience, allowing consumers to effortlessly connect with their favorite small businesses while ensuring merchants enjoy free transactions.SumUp Pay simplifies money management for consumers, providing them with enhanced spending experiences and financial tools that are tailored for today's lifestyle—covering banking, card services, savings, and open banking functionalities.This pivotal engineering role involves taking full ownership of the SumUp Pay iOS application, where you will develop and ensure the quality of features that consumers use daily. You will collaborate closely with Backend Engineers, Product Managers, Designers, and Android Engineers to create polished, reliable, and impactful mobile experiences.

AJ Bell seeks a Senior Flutter Engineer to design and build mobile applications. This position involves close collaboration with teams throughout the company to deliver reliable and seamless user experiences. Role overview This role focuses on developing mobile apps using Flutter. The Senior Engineer will contribute to key software projects and ensure that applications meet high standards for usability and performance. Collaboration Working alongside cross-functional teams, the Senior Flutter Engineer will support the delivery of important projects and help shape the direction of AJ Bell’s mobile offerings. Location This hybrid role is based in Manchester or London.

Join Our Mission to Empower the UK's Small Businesses At Funding Circle, we believe that small businesses are the backbone of the economy, and we strive to provide them with the resources they need to thrive. Our innovative platform leverages smart data to deliver funding solutions in minutes instead of weeks.As a unique fintech company, we combine the dynamic energy of a startup with the stability of a publicly listed organization. This blend offers our team members the autonomy to make impactful decisions while driving significant change.We foster a high-performing culture that emphasizes collaboration and support. Together, we challenge each other, champion our successes, and ensure that everyone feels valued—because we understand that teamwork accelerates progress and enhances our work.Real Impact: Last year, businesses utilizing our platform contributed £7.2 billion to the UK economy. Come be a part of something meaningful![Explore Our Impact Report] | [Check Our Trustpilot Reviews]The Role Location: London (Hybrid) | In-Office: 2 Days | Competitive Salary + BenefitsWe are seeking a talented React Native Engineer to join our innovative team and work on a groundbreaking new product within our established financial services framework. You will excel in a fast-paced environment, adept at navigating uncertainty and solving complex challenges within a collaborative cross-functional team. Your contributions will be crucial in developing and scaling our Mobile App, enabling businesses to access flexible financing solutions. Your enthusiasm for technology and problem-solving skills will be key in advancing our mission.Collaborate within an agile, cross-functional team and technology guilds.Craft exceptional user experiences for our customers.Drive innovation through software development.Implement business functionalities using React Native for both iOS and Android platforms.Engage in code reviews, technical discussions, and collaborative efforts.Mentor and support your colleagues.Create unit, integration, and end-to-end tests to ensure robust code quality.