Android Engineer

xAI

SpaceXAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: We're seeking an exceptional Android engineer to join a small, high-impact team dedicated to creating the world's most valuable AI application, judged by the impact it delivers to users. You'll shape cutting-edge mobile experiences, blending technical mastery with a keen product sense to deliver brilliance that resonates with users. You will work on the most critical product or technical challenge at any given time. BASIC QUALIFICATIONS: * Proficient in Kotlin, Jetpack Compose and reactive programming. * Has a strong product sense and high craft bar. Builds intuitive and delightful user experiences. * Experienced in architecting modern large production apps while embodying technical excellence. * Strong sense of ownership and agency. Able to put on multiple hats and take responsibility for large areas. * Able to optimize for performance, stability and reliability. PREFERRED SKILLS AND EXPERIENCE: * A proven track record of shipping standout apps or features that demonstrate both technical excellence and exceptional product intuition. * Deep expertise in the Android ecosystem and related development tools (Android Studio, Gradle, etc.). * Rust for working with our backend components. COMPENSATION AND BENEFITS: £107,000 - £262,000 GBP Base salary is just one part of our total rewards package at SpaceXAI, which also includes equity, comprehensive healthcare and dental coverage, cash plan, income protection, life insurance, and various other discounts and perks. SpaceXAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

Flo Health

500M+ downloads. 80M+ monthly users. A decade of building – and we’re still accelerating. Flo is the world’s #1 health & fitness app worldwide on a mission to build a better future for female health. Backed by a $200M investment led by General Atlantic, we became the first product of our kind to reach a $1B valuation in 2024 – and we’re not slowing down. With 7M paid subscribers and the highest-rated experience in the App Store’s health category, we’ve spent 10 years earning trust at scale. Now, we’re building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better. The job As an Android Engineer at Flo, you'll help shape the mobile experience for millions of people, and do genuinely meaningful work in women's health. Our app is trusted by 1 in 4 women aged 18–44 in the US and used across 100+ countries, with machine learning and AI powering accurate cycle predictions and personalised, medically credible health insights. We build large-scale mobile applications with rich, intuitive interfaces - optimised for speed, accessibility and privacy. You'll join a cross-functional team working across the full mobile lifecycle, from feature ideation through to release and iteration, with real ownership over value delivery end to end. We're not a feature factory. Our engineers are pragmatic problem-solvers who thrive in fast-moving environments and care about what they ship. You'll have genuine scope to experiment, lead ambitious product initiatives and implement solutions that matter - not just clear a backlog. Flo is a constantly evolving product, and we give our engineers the trust and autonomy to evolve it. Your Experience Must have: * 7+ years of hands-on Android development experience, with a track record of shipping and maintaining production applications at scale * Experience building large, complex mobile applications with polished, performant UIs - ideally for global consumer audiences * Strong proficiency in Java, with solid object-oriented design principles and a keen eye for clean, maintainable code * Deep knowledge of the Android ecosystem - including platform fragmentation, UI design patterns, and delivering consistent experiences across a wide range of screen sizes and devices * Solid familiarity with Google technologies, Play Store submission processes, and Google's development guidelines * A good grasp of the full mobile product lifecycle, with practical experience working within Agile teams Nice to have: * Knowledge of Kotlin programming language, Clean Architecture and reactive programming * An eye for UX and interaction design - you care about how things feel, not just how they work * Hands-on experience with mobile CI/CD tooling, including build, test and release automation * Experience integrating with analytics and BI systems, including A/B testing frameworks * Experience with alternative Android markets * Experience optimising data usage over mobile networks and building offline-first applications What you'll be doing You'll be responsible for: * Developing features using modern frameworks, libraries and in-house components - contributing to a shared codebase built to last * Delivering polished, intuitive user experiences that meet a high bar for design and usability * Maintaining and improving a continuous delivery pipeline, ensuring fast, reliable and safe releases to production #LI-Hybrid #LI-AJ1 Annual Salary Range (ranges may vary based on skills and experience) £95,000—£120,000 GBP How we work We’re a mission-led, product-driven team. We move fast, stay focused and take ownership – from brief to build to impact. Debate is encouraged. Decisions are shared. We care about craft, ship with purpose, and always raise the bar. You’ll be working with people who take their work seriously, not themselves. It takes commitment, resilience, and the drive to keep going when things get tough. Because better health outcomes are worth it.  What you'll get We support impact with meaningful reward. Here’s what that looks like: * Competitive salary and annual reviews * Opportunity to participate in Flo’s performance incentive scheme * Paid holiday, sick leave, and female health leave * Enhanced parental leave and pay for maternity, paternity, same-sex and adoptive parents * Accelerated professional growth through world-changing work and learning support * In-person collaboration and work in a hybrid model, with 3 days per week spent in the office * 5-week fully paid sabbatical at 5-year Floversary * Flo Premium for friends & family, plus more health, pension and wellbeing perks Diversity, equity and inclusion Our strength is in our differences. At Flo, hiring is based on merit, skill and what you bring to the role – nothing else. We’re proud to be an equal opportunity employer, and we welcome applicants from all backgrounds, communities and identities. Read our privacy notice for job applicants.

Sumup

About the team: At SumUp, we're on a mission to bring merchants and consumers closer together and help local communities thrive. With SumUp Consumer, we're building a rewarding banking experience that connects people to the small businesses they love while enabling free transactions for our merchants. SumUp Consumer helps consumers manage their money with ease and get more from everyday spending. It offers seamless payment experiences and financial tools designed for modern life—spanning banking, cards, savings, and open banking. This is a high-impact Engineering Manager role where you'll lead a cross-functional team of backend, iOS, and Android engineers building the systems and experiences that power SumUp Consumer. You'll be responsible for the reliability, quality, and pace of delivery across features that consumers interact with every day—while growing a team that takes real ownership of what they ship. You'll work closely with Product and Design to turn ambitious ideas into production-grade products, and you'll help shape the technical direction of a consumer experience that's still defining itself. This is a role for someone who stays close enough to the technology to make good calls, and cares enough about people to make the team genuinely good at what they do.   What you’ll do: * Lead and build a high-performing team by coaching, mentoring, and supporting engineers in their growth and development. * Stay hands-on with technology—contributing to system design, reviewing code, and guiding technical decisions to ensure high-quality, scalable solutions. * Partner closely with Product and Design to define goals, translate user needs into technical solutions, and deliver impactful features. * Drive execution and delivery, balancing speed and quality while ensuring reliable and scalable backend systems. * Collaborate cross-functionally with engineering, product, and business teams to align priorities and make thoughtful trade-offs. * Shape the engineering culture by promoting best practices, ownership, and continuous improvement. * Advocate for the user, ensuring we build products that truly improve the experience for local merchants and consumers.   You’ll be great for this role if you have: * A strong backend or mobile engineering background, with hands-on experience building distributed systems, APIs, and scalable services. * Proven experience as an Engineering Manager (2+ years), with a track record of leading, mentoring, and growing high-performing engineering teams. * A hands-on mindset—you enjoy staying close to the code, contributing to technical decisions, and tackling complex challenges, not just managing from a distance. * Experience with modern technologies such as Go, Kotlin, Python, or similar, along with cloud-native environments (e.g., AWS, Docker, Kubernetes) or relevant mobile engineering tools. * A product-oriented approach, with the ability to make pragmatic decisions and thoughtful trade-offs in a fast-paced environment. * Strong communication skills, with the ability to bring clarity, alignment, and influence across both technical and non-technical stakeholders. * An empathetic leadership style, with a focus on team well-being, continuous feedback, and professional growth. * Adaptable and action-oriented, comfortable navigating ambiguity and shifting priorities with confidence.   Why you should join SumUp: * Opportunity to work with a truly global, multicultural team from our central London Bridge location, wrapped in historic charm and modern flair. This involves an office-first setup * Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced * Enrolment onto our VSOP program: you will own a stake in SumUp’s future success * Generous time off: enjoy 28 days of paid leave, plus bank holidays and special leaves * Health matters: Vitality health cover, including optical and dental * Life made easier: salary-sacrifice commuter benefits via Gogeta * Financial security: retirement scheme (SumUp matches 7% when you contribute 5%) * Peace of mind: life insurance from MetLife for 2× your salary * Break4me: 1-month sabbatical after 3 years of service * Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team   About us: Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.  SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website, and follow our journey on LinkedIn and Instagram. Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.