Senior/Lead Mobile (iOS/Android) Developer

🏢 Summary: Lead Android Developer role focused on designing, developing, and maintaining high-quality Android applications using Kotlin and modern best practices. The position involves leading technical decisions, ensuring code quality, and collaborating with cross-functional teams to deliver robust mobile solutions. 🗂️ Requirements: 5+ years of Android development experience, Strong proficiency in Kotlin, Experience with Android SDK, Experience with App Components, Knowledge of Android UI frameworks, Understanding of Android design patterns, Knowledge of mobile architectures and trends, Understanding of full mobile development lifecycle, Experience with networking on Android, Experience with local data caching, Experience with multitasking on Android, Experience with third-party libraries and services 📃 Skills: Kotlin, Android, AndroidSDK, AppComponents, UI, DesignPatterns, Architecture, Networking, Caching, Multitasking, Lifecycle, Libraries 🏢 Description: We are seeking a highly skilled Lead Android Developer to join our dynamic team. The ideal candidate will have a proven track record in Android development, strong proficiency in Kotlin, and a passion for building high-quality mobile applications. As a Lead Android Developer, you will play a key role in designing, developing, and maintaining innovative Android applications, while collaborating with both local and remote team members. Responsibilities Design and develop high-quality Android applications using the latest technologies and best practices Collaborate with cross-functional teams to define project requirements and deliver solutions that meet customer needs Ensure the performance, quality, and responsiveness of applications by conducting thorough code reviews and testing Maintain code integrity, organization, and documentation Stay up-to-date with the latest technologies and trends in Android development Requirements Proven 5+ years of working experience in Android development (Android SDK) Proficiency in Kotlin for Android Experience in App Components, UI frameworks, developer tools, and workflows Good understanding of Android Design Patterns Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies Solid understanding of the full mobile development life cycle Good understanding of networking, caching local data and multitasking on Android Experience with 3rd party libraries and services Ability to work in a dynamic team environment, with a mix of local and remote resources Very good communication skills English proficiency at B2 level or higher Nice to have Previous experience with React Native We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Mobile Engineer role focused on designing and delivering high-quality, scalable mobile applications for both iOS and Android in an international project. The position involves contributing to architecture decisions, ensuring performance and security, and maintaining code quality through best practices and testing. 🗂️ Requirements: 7+ years of mobile development experience, Strong experience with iOS development using Swift, Strong experience with Android development using Kotlin, Solid understanding of MVVM or Clean Architecture, Experience integrating RESTful APIs, Knowledge of mobile performance, scalability, and security best practices, Experience working with Agile methodologies (Scrum or Kanban) 📃 Skills: Swift, Kotlin, iOS, Android, MVVM, CleanArchitecture, REST, Performance, Scalability, Security, Agile, Scrum, Kanban 🏢 Description: We are looking for a Senior Mobile Engineer with strong experience in both iOS (Swift) and Android (Kotlin) to join an international project focused on building high-quality mobile applications. Main Responsibilities: Design, develop, and maintain mobile applications for both iOS and Android platforms Contribute to the architecture and technical decisions of mobile solutions Build scalable, high-performance, and user-focused applications Collaborate closely with Product Managers, Designers, and other Engineers Ensure code quality through best practices, code reviews, and testing Troubleshoot, debug, and optimize application performance Key Requirements: 7+ years of experience in mobile development Strong hands-on experience with: iOS (Swift) Android (Kotlin) Solid understanding of mobile architectures (e.g., MVVM, Clean Architecture) Experience integrating RESTful APIs Knowledge of mobile performance, scalability, and security best practices Experience with Agile methodologies (Scrum/Kanban) Strong problem-solving skills and attention to detail Good communication skills in English Nice to Have: Experience with cross-platform solutions (e.g., Kotlin Multiplatform, Flutter, React Native) Familiarity with CI/CD pipelines for mobile applications Experience with automated testing (unit/UI) Knowledge of mobile app distribution processes (App Store / Google Play)

🏢 Summary: Senior React Native Developer role focused on designing, developing, and maintaining cross-platform mobile applications using React Native. The position involves building new features, optimizing performance, integrating backend services, and ensuring high code quality. It requires strong expertise in modern JavaScript/TypeScript and mobile development practices. 🗂️ Requirements: Minimum 4 years of mobile application development experience, At least 2 years of commercial experience with React Native, Strong knowledge of JavaScript (ES6+), Strong knowledge of TypeScript, Experience with state management (Redux or Context API), Experience integrating REST API or GraphQL, Experience publishing apps to App Store and Google Play, Ability to debug and optimize mobile applications, Experience with CI/CD tools, Experience with code reviews and applying best coding practices 📃 Skills: React, ReactNative, JavaScript, TypeScript, Redux, ContextAPI, REST, GraphQL, CI/CD, iOS, Android, Swift, Objective-C, Kotlin, Java, Jest, Detox, Fastlane, Bitrise, AppCenter 🏢 Description: We are seeking an experienced Senior React Native Developer to join our team. In this role, you will be responsible for designing, developing, and maintaining mobile applications using React Native. The ideal candidate has a strong background in JavaScript/TypeScript, hands-on experience with React Native, and a solid understanding of mobile application development. Experience with native development for iOS and/or Android is a strong plus. Responsibilities Design and implement new features for mobile applications using React Native Maintain and enhance existing mobile applications Collaborate with project teams, designers, and QA engineers Optimize application performance and troubleshoot technical issues Participate in code reviews and share knowledge with the team Integrate applications with backend services (REST API, GraphQL) Apply best coding practices and ensure high code quality Requirements Minimum 4 years of experience in mobile application development, including at least 2 years with React Native Strong knowledge of JavaScript (ES6+) and TypeScript Experience with state management tools such as Redux, Context API, or similar Familiarity with publishing apps to the App Store and Google Play Ability to debug and optimize mobile applications Experience with CI/CD tools Good command of English, both written and spoken, for technical communication Nice to have Experience with native iOS development (Swift/Objective-C) and/or Android development (Kotlin/Java) Familiarity with tools like Fastlane, Bitrise, App Center Experience with mobile app testing (e.g., Jest, Detox) Understanding of mobile application security best practices We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Technical leadership role for an experienced Flutter developer to lead a mobile team, maintain and evolve an existing app portfolio, and drive migration to a new architecture. The position combines hands-on Flutter development with architectural decision-making and code quality ownership. Focus is on delivering scalable, high-quality mobile solutions for Android and iOS. 🗂️ Requirements: 5+ years mobile app development for Android or iOS, 3+ years hands-on Flutter experience, Strong knowledge of Dart and asynchronous programming, Experience with REST APIs and sockets, At least one Flutter app released to production, Understanding of mobile architecture and best practices, Solid knowledge of OOP and SOLID principles, Experience in technical leadership or senior role with team responsibilities, Commitment to clean, maintainable code and code reviews 📃 Skills: Flutter, Dart, Android, iOS, REST, Sockets, RxDart, Streams, OOP, SOLID, Architecture, Async, AppStore, GooglePlay 🏢 Description: We are seeking an experienced Lead Flutter Developer to join our team and assume a technical leadership position. You will coordinate and mentor the mobile development team, maintain our current app portfolio, and guide the transition to a new architecture. If you have a passion for mobile technologies, proven leadership abilities, and aim to make a significant impact on our products and solutions, we encourage you to apply. Responsibilities Lead the mobile development team to ensure smooth operations and achievement of project goals Coordinate team efforts and foster collaboration to meet deadlines and deliverables Maintain the existing app portfolio and contribute to the migration toward a new architecture Improve team processes by participating in planning, grooming, technical discussions and estimations Conduct regular code reviews, provide constructive feedback and support team members through coaching and mentoring Make architectural decisions to ensure solutions align with business and technical requirements Promote knowledge sharing and best practices while encouraging new ideas across the team Requirements At least 5 years of experience in mobile app development for Android or iOS Understanding of mobile architecture and platform-specific best practices Experience with REST APIs and sockets Minimum 3 years of hands-on experience with Flutter and knowledge of Dart, including async programming with Streams or RxDart At least one Flutter app released in production on the App Store or Google Play Background in OOP and SOLID principles Commitment to clean, maintainable code and supporting others in achieving the same Experience in a development team leadership role or a senior position with team responsibilities Strong communication skills and a collaborative mindset We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Mobile Developer role focused on building and maintaining an enterprise-grade mobile SDK for passwordless authentication used globally. The position involves low-level mobile engineering, security and cryptography implementation, and performance optimization across Android and iOS platforms. The role includes architectural decision-making and close collaboration with backend teams in an international environment. 🗂️ Requirements: 6+ years commercial experience in mobile development (Android and/or iOS), Strong knowledge of Kotlin and/or Swift, Practical experience in developing mobile SDKs, Cross-platform experience with Android and iOS, Knowledge of OS internals (memory, threading, security model), Experience with cryptography or threat modeling, Experience in performance optimization, Knowledge of concurrency and asynchronous programming, Experience with CI/CD for mobile applications, English proficiency min. B2, Polish proficiency min. C1 📃 Skills: Kotlin, Swift, Android, iOS, SDK, Cryptography, Concurrency, CI/CD, Threading, Memory, Security, Git 🏢 Description: Cześć! Dla naszego klienta, międzynarodowej firmy z branży usług informatycznych, poszukujemy Senior Mobile Developera, który dołączy do zespołu budującego nowoczesną platformę passwordless authentication, wykorzystywaną na milionach urządzeń na całym świecie. To rozwiązanie klasy enterprise, używane m.in. w sektorze finansowym i bankowym, które odpowiada za bezpieczne zarządzanie tożsamością użytkowników. Projekt koncentruje się na rozwoju zaawansowanego mobile SDK, które stanowi warstwę bezpieczeństwa działającą bezpośrednio na urządzeniu użytkownika. Będziesz mieć okazję pracować blisko systemu operacyjnego, w obszarze security, wydajności i low-level engineeringu, tworząc produkt używany przez innych developerów. Wspólnie z zespołem będziesz podejmować kluczowe decyzje architektoniczne mające wpływ na dalszy rozwój produktu. Lokalizacja: Gdańsk Model pracy: Hybryda lub zdalnie (sporadyczne wizyty w biurze) Forma zatrudnienia: B2B lub umowa o pracę Wynagrodzenie: B2B: 169 - 190 PLN/h + VAT || UoP: 20750 - 23000 PLN brutto Zakres obowiązków: rozwój i utrzymanie mobilnego SDK (Android/iOS), projektowanie i implementacja rozwiązań z zakresu bezpieczeństwa i kryptografii, praca z pamięcią, wielowątkowością i optymalizacją wydajności, integracja z mechanizmami systemowymi (lifecycle, permissions, system services), analiza zmian w systemach operacyjnych i dostosowywanie SDK do nowych wersji platform, udział w projektowaniu rozwiązań, security reviews oraz podejmowaniu decyzji architektonicznych, ścisła współpraca z zespołami backendowymi, praca w środowisku międzynarodowym (język angielski na co dzień). Oczekiwania: 6+ lat doświadczenia komercyjnego w tworzeniu rozwiązań mobilnych (Android i/lub iOS), bardzo dobra znajomość Kotlin i/lub Swift, praktyczne doświadczenie w tworzeniu mobile SDK, elastyczność i gotowość do działania cross-platformowo (zarówno w środowisku Androidowym, jak i iOS), solidna wiedza z zakresu: OS internals (memory, threading, security model) oraz lifecycle i zarządzania zasobami, doświadczenie z kryptografią lub threat modelingiem, doświadczenie w optymalizacji wydajności, praktyczna wiedza z zakresu concurrency i programowania asynchronicznego, znajomość procesów CI/CD dla aplikacji mobilnych, bardzo dobra znajomość języka angielskiego (min. B2), płynna znajomość języka polskiego (min. C1), umiejętność samodzielnej pracy i branie odpowiedzialności za tworzony produkt, nastawienie na bycie częścią zespołu i otwartość na feedback. Mile widziane: doświadczenie cross-platform (np. Kotlin Multiplatform, React Native, Flutter), znajomość narzędzi do profilowania (np. Instruments, Perfetto, Systrace), doświadczenie z komponentami sprzętowymi (TEE, Secure Enclave, KeyStore), wiedza z zakresu mobile security (RASP, root/jailbreak detection, anti-tampering, itp.), podstawowa znajomość UX / procesów projektowania produktów cyfrowych. Oferujemy: realny wpływ na rozwój produktu używanego globalnie przez miliony użytkowników, dużą samodzielność oraz szerokie możliwości rozwoju, pracę w płaskiej strukturze i możliwość proponowania własnych rozwiązań, środowisko nastawione na jakość i konstruktywny feedback, wsparcie przełożonego, program mentoringowy i regularne spotkania 1on1, współpracę w oparciu o kontrakt B2B lub umowę o pracę, elastyczne godziny pracy (start między 7:00 a 10:00), nowoczesny sprzęt (MacBook + urządzenia testowe), integracje zespołowe i warsztaty techniczne, pakiet benefitów (prywatna opieka medyczna, MultiSport, lekcje angielskiego), pracę zdalną ze sporadycznymi wizytami w gdańskim biurze.

🏢 Summary: Senior Android Developer role focused on building business-critical native Android applications in Kotlin for next-generation premium electric vehicles. The position combines hands-on development with technical ownership, including code reviews and mentoring, in a complex automotive environment. Strong emphasis on quality, performance, scalability, and integration-focused functionality. 🗂️ Requirements: 5+ years Android application development experience, Strong experience with native Android development in Kotlin, Solid understanding of Android development lifecycle, Strong knowledge of Kotlin Coroutines and asynchronous programming, Experience with software design patterns and modular architecture, Experience building business-critical and integration-focused features, Experience with unit testing and debugging, Ability to maintain high code quality standards, Experience working with Jira and Confluence, Upper-Intermediate English or higher 📃 Skills: Kotlin, Android, Coroutines, UnitTesting, Jira, Confluence, Embedded, Automotive 🏢 Description: About the project We are looking for a Senior Android Developer to join an innovative automotive project focused on next-generation electric mobility solutions . You will work with a European R&D center delivering premium digital products and technologies for some of the world’s leading automotive brands. The project is focused on building business-critical Android applications that support the future of premium electric vehicles . This is a great opportunity to join a fast-paced, engineering-driven environment where quality, performance, and reliability are essential. Your role As a Senior Android Developer , you will be responsible for designing and developing native Android applications in Kotlin , with a strong focus on business logic, integrations, code quality, and maintainability . This role combines hands-on development with technical ownership — including code reviews, mentoring, and cross-team collaboration in a complex automotive environment. Tech stack / environment Kotlin Native Android Kotlin Coroutines Unit testing Jira / Confluence Automotive / Embedded environment What you’ll do Design and develop native Android applications in Kotlin Build and maintain business-critical features and integration-related functionality Write clean, maintainable, and testable code Apply design patterns and best engineering practices to create scalable and well-structured solutions Collaborate with cross-functional teams in a complex product environment Perform code reviews and support high engineering standards Contribute to unit testing , bug fixing, and continuous quality improvements Help solve technical challenges and communicate solutions clearly Support and mentor other team members in mobile development What we’re looking for 5+ years of experience in Android application development Strong hands-on experience building native Android applications in Kotlin Solid understanding of the Android development lifecycle Strong knowledge of Kotlin Coroutines and asynchronous programming Experience writing maintainable, testable, and well-structured code Experience designing and developing business-critical and integration-focused functionality Good understanding of software design patterns and modular application architecture Experience with unit testing , debugging, and code quality practices Ability to work independently in a fast-paced environment Strong communication skills and ability to explain technical challenges and solutions clearly Experience working with Jira and Confluence Upper-Intermediate English or higher Nice to have Experience in the Embedded Automotive domain Experience with Head Unit Android Apps Experience in technically complex, multi-team product environments Perks and Benefits: Flexible work schedule Fixed financial bonus issued upfront on a quarterly basis, covering the average market price of private medical care and sport card - B2B contract Present on the occasion of birthday, wedding, child birth E-learning accounts for Coursera, O'Relly, Udemy Corporate language school

🏢 Summary: Long-term remote contract for an experienced Native Mobile Developer working with SwiftUI and Kotlin, starting October 1, 2026. The role requires a minimum 4 days per week commitment with occasional onsite presence in Hamburg. The offer includes a B2B contract with competitive hourly rate and collaboration in an international environment. 🗂️ Requirements: Practical experience with SwiftUI, Practical experience with Kotlin, Minimum 4 working days per week availability, German language proficiency at minimum B2 level, English language proficiency at B2/C1 level, Availability for occasional onsite meetings in Hamburg 📃 Skills: SwiftUI, Kotlin, iOS, Android 🏢 Description: Join a long-term enterprise development team as a Senior Native Mobile Engineer to build, scale, and optimize core mobile applications. This role requires an engineer capable of working cross-platform across native environments using SwiftUI for iOS and Kotlin for Android. You will play a central role in delivering smooth user experiences, maintaining high code quality, and aligning directly with team leads and client stakeholders based in Germany. Details Start Date: October 1, 2026. Duration: Long-term project (contracts renewed in stable 3-month cycles). Allocation: 0.75 FTE / 1 FTE Rate: 160-200 PLN net / hour. Work Model: 100% Remote (with occasional meetings on-site at the client’s office in Hamburg). Language Requirement: German at a minimum B2 level (C1 preferred) for daily engineering and business communication. Responsibilities Native Development: Design, build, and maintain robust native mobile applications using SwiftUI (iOS) and Kotlin (Android). Clean Architecture: Write clean, modular, and easily testable code while implementing modern mobile architecture patterns (e.g., MVVM, MVI). API Integration: Connect mobile frontends with secure backend RESTful APIs and real-time data streams. UI/UX Excellence: Implement fluid animations, responsive layouts, and modern components according to design specifications. Performance Tuning: Monitor, debug, and optimize application rendering speeds, memory usage, and battery consumption profiles. Requirements Native Platform Mastery: Strong commercial track record in native iOS development ( Swift / SwiftUI ) and native Android development ( Kotlin ). Ecosystem Knowledge: Solid understanding of platform-specific deployment workflows, App Store Connect, and Google Play Console environments. Software Engineering Principles: Experience with Git workflows, automated testing frameworks, and continuous integration (CI/CD) pipelines for mobile. Soft Skills: Highly autonomous mindset, comfortable aligning directly with international clients, and strong team-player capabilities.

🏢 Summary: Opportunity for an experienced Mobile App Developer to build and enhance Android and cross-platform applications supporting digital identity and service delivery solutions. The role focuses on developing scalable, high-quality mobile products within an Agile, multidisciplinary team environment. 🗂️ Requirements: Several years of mobile development experience, Strong knowledge of Android development, Proficiency in Kotlin, Experience working in Agile teams, Ability to contribute to application architecture and performance improvements 📃 Skills: Android, Kotlin, ReactNative, Agile, Cloud 🏢 Description: We are looking for an experienced Mobile App Developer to join a global product team working on applications that support digital identity and service delivery solutions. The role involves developing and improving mobile applications, primarily on Android, as well as contributing to cross-platform solutions. You will collaborate with a multidisciplinary team in an Agile environment to build reliable, user-friendly, and scalable products. Key Responsibilities: Develop and maintain mobile applications Collaborate with designers, analysts, and developers Contribute to application architecture and performance improvements Ensure code quality and reliability Requirements: Several years of experience in mobile development Strong knowledge of Android development (Kotlin) Ability to work in a collaborative, Agile team Good communication skills Nice to Have: Experience with cross-platform technologies (e.g., React Native) Familiarity with modern development tools and cloud environments

🏢 Summary: Senior Mobile Developer role for a large-scale e-commerce mobile application focused on ad delivery and user experience improvements. The position involves designing, developing, and optimizing high-performance Android features while collaborating with cross-functional teams in a fast-paced environment. The offer includes remote work with occasional visits to Warsaw and a high degree of team autonomy. 🗂️ Requirements: 5+ years of commercial Android development experience, Strong Kotlin knowledge, Experience with MVVM, MVI, or Clean Architecture, Experience with REST APIs, Knowledge of asynchronous programming, Ability to write unit and integration tests, Experience with Git, Understanding of software engineering principles, data structures, and algorithms, Experience with CI/CD pipelines, English communication skills 📃 Skills: Kotlin, Android, REST, Git, MVVM, MVI, CI/CD, RxJava, RxKotlin, Coroutines, JetpackCompose 🏢 Description: Salary: 1000 - 1200/ MD + VAT (B2B) Remote: remotely (with occasional visits to the client's office - Warsaw) Why choose this offer? Working in a team you can always count on we have on board top-class specialists and experts in their areas of expertise A high degree of autonomy in terms of organizing your teams work - we encourage you to develop continuously and try out new things Work on a consumer-focused mobile project improving category experience and user interactions, directly impacting business results Project We are looking for a Senior Mobile Developer to support a project for one of Poland’s leading e-commerce platforms. The engineer will work within a team responsible for the technological layer of ad delivery in a large-scale mobile application. You will work closely with product owners, designers, and other engineers to translate user needs into robust, high-performance mobile experiences . This role is ideal for someone with solid experience in mobile development, a strong understanding of software engineering principles, and a desire to grow their expertise in a fast-paced e-commerce environment. What you will be doing on this postion: Design, develop, test, and deploy features, ensuring high quality, performance, and responsiveness Collaborate with product, design, and other engineering teams to define and implement innovative solutions Participate in code reviews, contribute to technical discussions, and help maintain high code quality standards Identify and resolve performance and scalability issues Continuously improve our development processes, tools, and infrastructure Expected competences and knowledge 5+ years of commercial experience in native Android development (Kotlin) Strong understanding o f mobile application architecture patterns (e.g., MVVM, MVI, Clean Architecture) Experience with REST APIs and asynchronous programming Proficiency in writing unit and integration tests Familiarity with version control systems (e.g., Git) Solid understanding of software engineering principles, data structures, and algorithms Experience with continuous integration and continuous delivery (CI/CD) pipelines Good communication skills in English, both written and spoken Nice to have : Experience with high-traffic mobile applications Knowledge of RxJava/RxKotlin, Coroutines, or Jetpack Compose Familiarity with A/B testing Open-source contributions or active GitHub profile Experience in Agile/Scrum environments Technologies you'll work with Kotlin (Android) REST APIs Git Jetpack Compose Coroutines / RxJava Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. 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.

🏢 Summary: Long-term remote B2B project for a Mobile Developer focused on native mobile application development using SwiftUI, iOS, and Kotlin. The role requires strong experience in native mobile apps and German language proficiency at B2 level or higher. The project starts in October 2026 with a minimum commitment of 4 working days per week. 🗂️ Requirements: Experience with native mobile application development, Strong knowledge of SwiftUI, Experience with Kotlin, German language proficiency at B2 level or higher, Availability for minimum 4 working days per week 📃 Skills: SwiftUI, iOS, Kotlin 🏢 Description: About the role We are looking for a Mobile Developer to join a long-term project focused on native mobile application development. Tech stack SwiftUI, iOS, Kotlin Requirements Experience with native mobile application development. Strong knowledge of SwiftUI (iOS). Experience with Kotlin. German language proficiency at B2 level or higher (C1 preferred). We offer B2B contract. Rate: 130–180 PLN/hour . Remote work. Long-term project Minimum commitment of 4 working days per week. Project start in October 2026. Recruitment process Screening interview. Client interview. Decision.