Salary: 1000 - 1400 PLN/ MD (B2B, full-time) Location: Elastic hybrid work model from our Gdynia or Warsaw office (1 day per week on-site)   Why choose this offer? High level of autonomy and technical ownership, with real influence on architectural and product decisions Opportunity to own and shape the mobile domain within a data-driven, market-leading product used by global energy professionals Inclusive, multicultural workplace with a strong focus on employee wellbeing and work-life balance   Project Project focuses on the development of cross-platform mobile applications delivering real-time energy market insights, analytics, and intelligence to a global customer base. The apps are built using Capacitor with React and Next.js, supported by native iOS and Android components to enable platform-specific functionality, high performance, and reliability. We are looking for a Mobile App Engineer who will own the mobile architecture, performance optimization, and release process. You will work closely with Product, Design, and Backend teams to build high-quality, user-friendly applications, integrating backend APIs, analytics, push notifications, and native features across iOS and Android.   What you'll be doing Develop and maintain Capacitorbased mobile apps, leveraging React/Next.js for UI and native modules for platformspecific features Manage release cycle and deployment to app stores for EAs mobile applications Own the mobile component of our push notification engine, via Apple APNS and FCM on Firebase Collaborate with UX/UI designers and engineers to implement mobile features Monitor app health via analytics and crash reporting, and drive performance optimizations Expected competences and knowledge Strong hands-on experience building and maintaining cross-platform mobile applications using Capacitor, React, and Next.js Solid understanding of native mobile development for React Native, iOS (Swift/ Objective-C) and Android (Kotlin/ Java) Experience managing mobile app release cycles, CI/CD pipelines, and App Store/ Google Play deployments Proven knowledge of push notification systems, including APNS and Firebase Cloud Messaging Strong understanding of RESTful APIs, authentication mechanisms, and data integration patterns Experience with automated testing frameworks (XCTest, Espresso, Playwright, Appium) Exposure to serverless architectures or deployment platforms (e.g., Vercel) Ability to collaborate effectively with designers, backend engineers, and product stakeholders Experience working with analytics, crash reporting, and performance monitoring tools Excellent communication skills and fluency in spoken and written English   Technologies you'll work with Capacitor React Next.js TypeScript React Native Swift/ObjectiveC Kotlin/Java   Client – why choose this particular client from the Jit portfolio? Our Client, an established and rapidly growing research-based consulting firm in the energy sector, is seeking skilled IT professionals to support their ambitious expansion plans. With a strong reputation for providing industry-leading short-, medium-, and long-term analyses and forecasts of energy markets, they enable their customers to make informed decisions on trading, investing, financing, and planning. Their recent acquisition of a macroeconomic research firm has further enhanced their offerings in global financial markets and allowed them to better serve an increasing client base amid the accelerating energy transition and market uncertainties.   About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.