Job Overview
Location
Remote
Job Type
Full-time
Category
Software Engineer
Date Posted
February 26, 2026
Full Job Description
đź“‹ Description
- • Are you a seasoned mobile engineering leader with a passion for crafting exceptional user experiences and a deep understanding of React Native? Ruby Labs, a dynamic and innovative tech company at the forefront of consumer products across health, education, and entertainment, is seeking a Lead React Native Developer to spearhead our mobile expansion. This is a pivotal role for an individual who thrives on product quality, relishes solving complex architectural challenges, and desires genuine ownership over features that directly impact our users' daily lives.
- • As our Lead React Native Developer, you will be instrumental in building and scaling our mobile applications, fundamentally shaping the future of our mobile presence. You will collaborate intimately with our backend and product teams, ensuring the delivery of a seamless, reliable, and high-performance user experience that sets new industry standards. Your expertise will guide our mobile strategy, from initial concept to polished execution, ensuring our applications are not just functional but delightful to use.
- • Your primary responsibility will be to lead the end-to-end development and delivery of new, innovative mobile product features. This involves not only conceptualizing and architecting these features but also overseeing their implementation, testing, and deployment. You will be the driving force behind bringing new ideas to life on mobile, ensuring they align with our product vision and technical roadmap.
- • A significant part of your role will involve maintaining and continuously improving our existing React Native codebase. This includes proactively identifying and addressing performance bottlenecks, enhancing stability, and refactoring code to ensure it remains maintainable, scalable, and efficient. You will champion best practices in code quality and technical debt management, ensuring our mobile applications remain robust and future-proof.
- • You will be tasked with defining and evolving our mobile architecture, system design, and overall technical strategy. This requires a forward-thinking approach, anticipating future needs and challenges, and establishing a solid foundation for our mobile growth. You will make critical decisions about technology choices, patterns, and best practices that will influence the direction of our mobile development for years to come.
- • Close partnership with backend, product, and design teams is crucial. You will translate product requirements into technical solutions, ensuring seamless integration with our backend services and a cohesive user experience aligned with design principles. This cross-functional collaboration will be key to shaping solutions that are not only technically sound but also meet user needs and business objectives.
- • Driving reliability, performance, and observability standards on mobile is a core tenet of this role. You will implement robust monitoring, logging, and alerting systems to ensure our applications are always available and performing optimally. This includes establishing clear metrics and dashboards to track key performance indicators and proactively identify potential issues.
- • You will own production debugging, incident investigation, and root cause analysis. When issues arise, you will be the go-to person for diagnosing problems, implementing fixes, and ensuring swift resolution. This requires a methodical approach to problem-solving and a commitment to preventing recurrence.
- • Guiding improvements in our build systems, CI/CD pipelines, release processes, testing strategies, and app store deployments will be a key area of focus. You will streamline these processes to increase efficiency, reduce errors, and accelerate our release cycles, enabling us to deliver value to our users faster.
- • Mentoring junior and mid-level engineers is an integral part of this leadership role. You will foster a culture of quality, ownership, and continuous execution by providing guidance, conducting thorough code reviews, sharing architectural insights, and supporting incident response. Your leadership will empower other engineers to grow and excel.
- • You will actively support our hiring efforts, helping to identify and attract top mobile engineering talent. Your involvement in the interview process and team building will be critical in growing a world-class mobile engineering team that aligns with Ruby Labs' ambitious vision.
- • Championing performance across all aspects of the mobile experience is paramount. This includes optimizing rendering, navigation, latency, memory usage, offline behavior, caching strategies, and real-time interactions. You will ensure our applications are fast, responsive, and provide a smooth user experience, even under demanding conditions.
- • Leading with accountability for failure cases, API degradation, recovery UX, and overall resilience is essential. You will design and implement strategies to gracefully handle errors, manage API downtimes, and ensure a positive user experience even when things don't go as planned. This proactive approach to resilience builds user trust and satisfaction.
- • You will maintain exceptionally high standards for clean code, adhering to SOLID principles, ensuring maintainability, and promoting comprehensive documentation. This commitment to code quality will underpin the long-term success and scalability of our mobile applications.
- • Your proven ability to lead architecture or technical strategy for a mobile app or a significant feature will be a cornerstone of your contribution. You will demonstrate a clear vision and the ability to execute it, driving technical excellence across the team.
- • You will possess a proven ability to coach others and elevate the technical bar across the entire engineering team. This involves sharing knowledge, promoting best practices, and fostering a collaborative learning environment.
- • Leading cross-team alignment during periods of ambiguity or critical incidents will be a key leadership competency. You will facilitate clear communication and coordinated action, ensuring all stakeholders are informed and working towards common goals.
- • Finally, you will be a key player in shaping the future of Ruby Labs' mobile presence, contributing to a culture of innovation, high performance, and ambitious growth. This is an opportunity to make a significant impact and build something truly remarkable.
🎯 Requirements
- • 5+ years of experience building mobile applications, with a significant focus on React Native development.
- • 2+ years in a technical leadership, lead, or architect role, demonstrating the ability to guide teams and technical direction.
- • Proven experience mentoring engineers through code reviews, architectural discussions, and incident response, fostering growth and best practices.
- • Strong understanding of mobile system design, component architecture, state management, navigation patterns, and performance trade-offs, with the ability to apply this knowledge to complex problems.
- • Experience optimizing UI performance, memory usage, rendering efficiency, and startup time for mobile applications.
- • Deep knowledge of React internals and rendering behavior (hooks, reconciliation, lifecycle, render cost), enabling advanced performance tuning.
- • Experience working with native modules and iOS/Android bridging, allowing for platform-specific integrations and optimizations.
- • Shipped and maintained applications on both the App Store and Google Play, demonstrating a full lifecycle understanding of mobile product delivery.
- • Experience with CI/CD, builds, release automation, and Over-The-Air (OTA) updates (e.g., EAS, CodePush, or similar), ensuring efficient and reliable deployment pipelines.
- • Experience implementing monitoring and observability tools (e.g., Sentry, OpenTelemetry, crash reporting, performance tracing) to ensure application health and performance.
- • Demonstrated ownership of edge cases, distributed failure modes, degraded APIs, offline synchronization, and recovery user experiences, ensuring robust application behavior.
- • Demonstrated ability to lead architecture or technical strategy for a mobile app or a major feature, with a clear vision and execution plan.
- • Maintains high standards for clean code, SOLID principles, maintainability, and documentation, ensuring code quality and longevity.
- • Proven experience leading and mentoring mobile engineers, fostering a high-performing team environment.
- • Proven ownership of technical strategy or architecture for mobile apps or features, driving technical direction.
- • Proven ability to coach others and raise the technical bar across a team, promoting continuous improvement.
- • Leads cross-team alignment during ambiguity or incidents, ensuring effective communication and coordinated action.
- • Experience in startup or high-ownership product teams, demonstrating adaptability and a proactive approach.
- • Experience scaling real-time or multi-region mobile architectures, handling complex and high-demand scenarios.
- • Experience designing or building design systems, shared component libraries, or mobile platform foundations, promoting consistency and efficiency.
- • Experience improving mobile security, analytics, performance profiling, and release automation, contributing to a well-rounded product.
- • Knowledge of edge caching, streaming real-time events, WebSockets, or offline-first architectures, enabling advanced application capabilities.
🏖️ Benefits
- • Remote Work Environment: Enjoy the flexibility and autonomy of working from anywhere, fostering a healthy work-life balance and global collaboration.
- • Unlimited PTO: Take the time you need to rest, recharge, and attend to personal matters without the stress of tracking vacation days, promoting well-being and preventing burnout.
- • Paid National Holidays: Observe and enjoy national holidays with paid time off, allowing you to celebrate and relax without impacting your income or leave balance.
- • Company-provided MacBook: Receive a high-performance Apple MacBook to ensure you have the best tools for productivity and seamless workflow, regardless of your location.
- • Flexible Independent Contractor Agreement: Benefit from a flexible working arrangement that offers autonomy, potential tax advantages, networking opportunities, reduced employment obligations, and the freedom to manage your work and life effectively.
Skills & Technologies
Go
Ruby
React
React Native
iOS
Frontend
Senior
Remote
About Ruby Labs Ltd.
Ruby Labs Ltd. is a London-based product studio that builds and scales consumer subscription mobile and web applications. The company focuses on health, wellness, and productivity verticals, developing apps such as Hint, Able, and the award-winning fitness platform FitCoach. Using data-driven growth and proprietary technology, Ruby Labs rapidly prototypes, launches, and iterates products to serve millions of global users. The team combines engineering, product design, and performance marketing expertise to create sustainable digital businesses. Founded in 2018, Ruby Labs operates a portfolio of self-funded apps, emphasizing user privacy, scientific validation, and long-term customer value.
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