Senior Mobile SDK Engineer (Security)

Senior Mobile SDK Engineer (Security) 175 - 206 PLN/hour + VAT (B2B) | 23 240 - 27 390 PLN gross (UoP) About Us At Framna, we partner with ambitious brands to create digital products that make a meaningful impact. We work across the full product journey, from strategy and UX to engineering and long-term growth, combining technical expertise with a strong product mindset. Together with our partners, we build solutions that users rely on every day. Our culture is built on trust, ownership, and fearless collaboration. We challenge ideas, support each other, and keep learning-openly sharing feedback, staying flexible in how we work, and approaching each other with empathy. Because the best products are created by teams that move forward together. About the Role We are working with our partner on a next-generation passwordless authentication platform used by millions worldwide. The product focuses on secure digital identity, combining biometrics, document verification, and data processing to enable one-tap access. In this role, you will play a key part in building innovative, high-performance SDKs that will run on millions of devices worldwide. You will work close to the system level, integrating deeply with Android and iOS internals, exploring platform services and security mechanisms, and staying ahead of OS changes. You will collaborate with backend engineers and security specialists to design solutions used in domains like banking and financial services. Please note that we follow a hybrid work model, with regular in-office syncs to stay aligned and collaborate as a team. Please note that we follow a hybrid model with a requirement for regular in-office syncs to foster team collaboration. Preferred Skills & Qualifications 8+ years of commercial software engineering experience, with a strong background in mobile development (Android/iOS) Hands-on experience building mobile SDKs or libraries used by external developers Strong focus on Developer Experience (DX) – ability to design clean, stable, and well-documented APIs Solid understanding of OS internals (e.g. memory management, threading, app lifecycle) Experience with performance optimization and resource management Familiarity with SDK distribution and testing strategies across different host applications Experience with CI/CD pipelines for mobile projects Ability to work independently in a distributed team Professional proficiency in English and Polish Nice to Have Experience with mobile security (e.g. RASP, root/jailbreak detection, obfuscation) Familiarity with secure hardware components (TEE, Secure Enclave, Android Keystore) Experience with performance profiling tools Exposure to cross-platform solutions (e.g. Kotlin Multiplatform) What you will find at Framna Real ownership and influence on the products you build A focus on business value over technical perfection Continuous feedback and open, honest communication Regular 1:1s and a mentoring program to support your growth Internal workshops and knowledge sharing across teams Flexible working hours (you can start between 7:00–10:00) Hybrid model with regular in-studio collaboration (Gdańsk, Wrzeszcz) High-quality equipment, including MacBook and testing devices Individual training budget English classes in small groups Plus the essentials: Private medical care (Compensa) and MultiSport Team gatherings and shared moments beyond work If you are motivated by ownership, collaboration, and continuous improvement, and you enjoy solving real problems with a team you can rely on—you will feel at home at Framna. Let’s build impactful products together. Department Engineering Locations Gdańsk Remote status Hybrid Employment type Full-time About Framna Framna is a diverse and global team of builders, thinkers, and creators. We are united by one mission: to craft digital products that make everyday life better for millions of people worldwide. Today, over 600 of us collaborate across ten studios in Denmark, the Netherlands, Poland, Sweden, Switzerland, and the US. Our name, rooted in Old Norse, means “to bring forward.” And that is exactly what we do. We partner with industry leaders (and those about to be) to create digital products that define markets, reshape industries, and drive meaningful growth. We call it Win by product.