Kotlin Multiplatform Developer

🏢 Summary: Role for a Kotlin Multiplatform Developer in a banking project focused on building and maintaining shared business logic for Android and iOS mobile applications used by hundreds of thousands of users. The position emphasizes high code quality, robust architecture, and automation within an agile environment. The developer will contribute to a secure, large-scale mobile solution with strong quality standards. 🗂️ Requirements: Minimum 3 years experience as Mobile Developer (Android/iOS), Very good knowledge of Kotlin, Practical experience with Kotlin Multiplatform (KMP), Experience in application architecture design (Clean Architecture, SOLID, MVVM/MVI), Knowledge of asynchronous programming (Coroutines, RxJava), Experience with dependency injection (Koin or Dagger), Experience with networking (Ktor or OkHttp), Experience in unit and integration testing (JUnit, Mockk), Knowledge of Git, Experience working with CI/CD, Communicative English 📃 Skills: Kotlin, KMP, Android, iOS, CleanArchitecture, SOLID, MVVM, MVI, Coroutines, RxJava, Koin, Dagger, Ktor, OkHttp, JUnit, Mockk, Git, CICD 🏢 Description: BlueSoft to innowacyjny Software House należący do Grupy Orange. Mamy wewnętrzną filozofię - tworzenie prostych i skutecznych rozwiązań dla skomplikowanych problemów. Powstaliśmy w 2002 roku i dziś współpracuje z nami ponad 1000 inżynierów i inżynierek znających przeszło 200 technologii! O projekcie: Dla naszego klienta z sektora bankowego poszukujemy osoby na stanowisko Kotlin Multiplatform Developer , która dołączy do zespołu rozwijającego nowoczesną aplikację mobilną wykorzystywaną przez setki tysięcy użytkowników. Celem zespołu jest budowa i rozwój wspólnej logiki biznesowej dla aplikacji Android i iOS z wykorzystaniem Kotlin Multiplatform (KMP) . Pracujemy w dojrzałym, zwinnym środowisku, z dużym naciskiem na jakość kodu, architekturę i automatyzację . Kogo szukamy? Szukamy osoby z doświadczeniem w tworzeniu aplikacji mobilnych , która pracowała z Kotlin Multiplatform i chce rozwijać się w projektach o wysokich wymaganiach jakościowych i bezpieczeństwa. Wymagania: min. 3 lata doświadczenia jako Mobile (Android/iOS) Developer , bardzo dobra znajomość Kotlina oraz praktyczne doświadczenie z Kotlin Multiplatform (KMP) , doświadczenie w projektowaniu architektury aplikacji ( Clean Architecture, SOLID, MVVM/MVI ), dobra znajomość asynchroniczności ( Coroutines, RxJava ), doświadczenie z dependency injection ( Koin/Dagger ), praca z komunikacją sieciową ( Ktor/OkHttp ), doświadczenie w testowaniu (unit, integration, BDD – JUnit, Mockk), znajomość Git oraz pracy w środowisku CI/CD , komunikatywna znajomość języka angielskiego. Mile widziane: znajomość Jetpack Compose/Compose Multiplatform , doświadczenie z SQLDelight , podstawowa znajomość iOS/Xcode/Swift (integracja, współpraca cross-platform), doświadczenie w projektach bankowych/fintechowych , znajomość zagadnień bezpieczeństwa (szyfrowanie, kryptografia), doświadczenie w pracy w dużych, rozproszonych zespołach i code review. Co zyskujesz dołączając do Bluesoft: 👨‍💻 współpracę w zespole interdyscyplinarnych ekspertów i ekspertek, zainspirowanych pracą w płaskiej hierarchii; 📈 stałą współpraca w pełnym wymiarze godzin w niezwykłej firmie, która rozwija się dynamicznie od 20 lat; 🚀 szansę na rozwój w różnorodnych projektach IT, realizowanych dla bardzo znanych i rozpoznawalnych klientów - liderów w swoich branżach; 🥇 możliwość pracy z najnowszymi technologiami w oparciu o najwyższe standardy developmentu; ⌚️ elastyczny czas i hybrydowy lub w pełni zdalny model pracy (w różnych zespołach funkcjonują różne ustalenia, nie narzucamy żadnych opcji); ☁ szereg inicjatyw wspierających dzielenie się wiedzą i rozwój, takich jak: szkolenia wewnętrzne, gildie tematyczne, możliwość szkolenia i certyfikacji w zakresie Cloud (partnerstwa technologiczne w czterech chmurach); 📣 możliwość nauki języka angielskiego lub niemieckiego online oraz zespołowe lekcje języka angielskiego; 🏋️‍♂️ możliwość dołączenia do Multisport i ubezpieczenia medycznego; ⛵️ morskie przygody – z nami popływasz po Morzu Karaibskim, Śródziemnym lub Północnym (udział w rejsach firmowych jest dofinansowany przez firmę).

🏢 Summary: The role focuses on architecting and maintaining shared business logic and high-performance networking/data layers using Kotlin Multiplatform for Android and iOS. You will own the shared codebase, ensure production-grade quality through robust testing, and align mobile and backend systems. The position emphasizes API strategy, CI/CD integration, and technical leadership in multiplatform development. 🗂️ Requirements: Proven experience with Kotlin Multiplatform for shared logic and networking layers, Strong knowledge of RESTful API communication and contract testing, Experience with serialization and secure authentication flows, Hands-on experience with multiplatform testing frameworks, Ability to collaborate with backend engineers on APIs and schemas, Minimum 5 years of commercial software development experience 📃 Skills: Kotlin, KotlinMultiplatform, KMP, REST, APIs, Serialization, KotlinX, Authentication, CI/CD, Testing, Android, iOS 🏢 Description: The Role As a key contributor to our cross-platform strategy, you will architect and refine shared business logic using Kotlin Multiplatform (KMP) . Your primary focus will be on engineering high-performance networking and data layers that serve both Android and iOS ecosystems. You won't just write code—you will take full ownership of the shared codebase, ensuring it remains scalable, maintainable, and robust in production. Operating at the heart of our mobile-to-backend infrastructure, you will drive technical excellence and help shape the future of our multiplatform development standards. Key Responsibilities Cross-Platform Engineering: Design and implement core business logic and data flows using Kotlin Multiplatform to ensure seamless performance across mobile platforms. API Strategy & Alignment: Partner with backend teams to define and validate API contracts. You will oversee serialization, secure authentication flows, versioning, and sophisticated error-handling strategies. Quality & Testing Excellence: Build and maintain comprehensive integration and E2E testing suites specifically for KMP, ensuring the shared layer is stable and reliable. Bridge Backend & Mobile: Act as a technical liaison to ensure that backend behavior perfectly aligns with mobile client requirements and user expectations. CI/CD Integration: Streamline test execution within CI pipelines to achieve high coverage and deterministic results for all shared mobile components. Requirements KMP Expertise: Proven track record in building shared logic, networking layers, and data persistence using Kotlin Multiplatform. Backend Savvy: Deep understanding of RESTful/API communication, including retry logic, serialization (e.g., KotlinX Serialization), and contract testing. Testing Rigor: Hands-on experience with multiplatform testing frameworks to dliver high-quality, production-ready code. Collaboration Skills: Ability to work effectively with backend engineers on complex schemas, auth flows, and system consistency. Professional Experience: A minimum of 5 years of commercial software development experience.

🏢 Summary: Opportunity to lead development of shared business logic and networking layers using Kotlin Multiplatform for Android and iOS platforms. The role focuses on architecting scalable, high-performance data and API layers, ensuring production stability through rigorous testing and CI integration. You will own the shared codebase and align backend and mobile systems to maintain robust, secure, and consistent cross-platform solutions. 🗂️ Requirements: Proven experience with Kotlin Multiplatform, Experience building shared business logic and networking layers, Strong knowledge of REST API communication, Experience with serialization and contract testing, Hands-on experience with multiplatform testing frameworks, Experience integrating tests into CI pipelines, Ability to collaborate with backend engineers on APIs and authentication, Minimum 5 years of commercial software development experience 📃 Skills: Kotlin, KMP, REST, APIs, Serialization, KotlinX, Android, iOS, Testing, CI, CD, Networking, Authentication 🏢 Description: The Role As a key contributor to our cross-platform strategy, you will architect and refine shared business logic using Kotlin Multiplatform (KMP) . Your primary focus will be on engineering high-performance networking and data layers that serve both Android and iOS ecosystems. You won't just write code—you will take full ownership of the shared codebase, ensuring it remains scalable, maintainable, and robust in production. Operating at the heart of our mobile-to-backend infrastructure, you will drive technical excellence and help shape the future of our multiplatform development standards. Key Responsibilities Cross-Platform Engineering: Design and implement core business logic and data flows using Kotlin Multiplatform to ensure seamless performance across mobile platforms. API Strategy & Alignment: Partner with backend teams to define and validate API contracts. You will oversee serialization, secure authentication flows, versioning, and sophisticated error-handling strategies. Quality & Testing Excellence: Build and maintain comprehensive integration and E2E testing suites specifically for KMP, ensuring the shared layer is stable and reliable. Bridge Backend & Mobile: Act as a technical liaison to ensure that backend behavior perfectly aligns with mobile client requirements and user expectations. CI/CD Integration: Streamline test execution within CI pipelines to achieve high coverage and deterministic results for all shared mobile components. Requirements KMP Expertise: Proven track record in building shared logic, networking layers, and data persistence using Kotlin Multiplatform. Backend Savvy: Deep understanding of RESTful/API communication, including retry logic, serialization (e.g., KotlinX Serialization), and contract testing. Testing Rigor: Hands-on experience with multiplatform testing frameworks to dliver high-quality, production-ready code. Collaboration Skills: Ability to work effectively with backend engineers on complex schemas, auth flows, and system consistency. Professional Experience: A minimum of 5 years of commercial software development experience.

🏢 Summary: B2B remote role for an experienced Software Engineer focused on building cross-platform components using C++, C#, and Kotlin Multiplatform. The position involves integrating native C++ modules with .NET applications and developing secure Windows-based functionality. You will contribute hands-on to designing and delivering scalable, high-quality technical solutions. 🗂️ Requirements: Commercial experience with C++, Experience with C# and native library integration, Ability to create and maintain NuGet packages, Knowledge of Windows programming, Experience with security modules, Experience with Kotlin Multiplatform or willingness to learn 📃 Skills: C++, C#, Kotlin, KotlinMultiplatform, .NET, NuGet, Windows, DLL 🏢 Description: Start Date: ASAP / Within 1 Month / Flexible Work Model: 100% remote Contract Type: B2B (180-200 PLN/h + VAT) We are looking for an experienced software engineer with strong skills in C++, C#, and Kotlin Multiplatform to join our engineering team. You will work on cross‑platform components, integrate native code with .NET applications, and contribute to developing secure and reliable features for modern systems. The role involves hands‑on coding, problem‑solving, and collaborating closely with other engineers to deliver high‑quality technical solutions. Expectations Solid commercial experience with C++ development , ideally on Windows. Practical experience using C# and integrating native libraries. Ability to create and maintain C# NuGet packages. Familiarity with Windows programming concepts, including security modules. Experience with Kotlin Multiplatform or willingness to learn it quickly. Responsibilities Develop cross‑platform components using C++, C#, and Kotlin Multiplatform. Integrate native C++ modules (DLLs) with C# applications. Build and maintain reusable C# libraries and NuGet packages. Implement and support Windows‑based functionality, including security‑related modules. Collaborate with the engineering team to design, test, and deliver scalable solutions. What We Offer Medicover healthcare package Multisport card Access to an e-learning platform Group life insurance

🏢 Summary: Mid-Level Kotlin Android Developer role focused on building secure, scalable mobile applications using modern Android technologies and architecture patterns. The position involves developing Kotlin-based apps with Jetpack Compose, integrating network services, and maintaining CI/CD pipelines in a hybrid Kraków-based setup. The role emphasizes high-quality, user-centric solutions within distributed teams. 🗂️ Requirements: Minimum 4 years of Android development experience with Kotlin, Strong knowledge of Android framework, Experience with Retrofit, Coroutines, and Room, Experience with MVP, MVVM, and Clean Architecture, Practical experience with CI/CD processes, Knowledge of mobile security practices including SSL pinning and encrypted data storage, Ability to troubleshoot and resolve technical issues, Fluent English (spoken and written), Legal right to work in the European Union 📃 Skills: Kotlin, Android, JetpackCompose, Retrofit, Coroutines, Room, ViewModel, LiveData, Koin, Dagger, Hilt, MVP, MVVM, CleanArchitecture, CICD, SSL, Encryption, Authentication, Flow 🏢 Description: Ignite the future of mobile innovation — shape seamless user experiences with Kotlin! Kraków-based opportunity with hybrid work model As a Mid-Level Kotlin Android Developer , you will be working for our client, a leader in digital transformation within the mobile platform industry. You will contribute to the development of cutting-edge mobile applications that enhance customer engagement and drive innovation in a data-driven world. Join a team committed to building secure, scalable, and user-centric digital solutions for today’s dynamic market. Your main responsibilities: Develop and enhance mobile applications in Kotlin, utilizing Jetpack Compose for modern UI design. Design and implement solutions based on MVP and MVVM architecture patterns. Integrate apps with network services using Retrofit and manage application state with ViewModel and LiveData. Manage dependencies effectively with tools such as Koin, Dagger, or Hilt. Create and maintain robust CI/CD pipelines to streamline deployment processes. Ensure application security by implementing secure data storage and network communication protocols. Participate in code reviews, retrospectives, and collaboration within distributed teams. Troubleshoot and resolve production incidents, ensuring high-quality user experiences. You're ideal for this role if you have: Minimum 4 years of experience in Android application development with Kotlin. Very good knowledge of Android framework and libraries such as Retrofit, Coroutines, Room. Strong understanding of application lifecycle, modularity principles, and dependency management. Practical experience with CI/CD processes. Familiarity with design patterns MVP, MVVM, and Clean Architecture. Knowledge of mobile security best practices including SSL pinning, encrypted data storage, and user authentication. Ability to diagnose and troubleshoot technical issues efficiently. Excellent communication skills in English (fluent level). Willingness to work in distributed teams and participate actively in knowledge sharing. It is a strong plus if you have: Certifications related to Android development or security. Experience with asynchronous programming models like Flow. Language required for the role: Excellent command of English, fluent in both spoken and written communication. Eligibility to work in this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior/Lead Mobile Developer role focused on leading the design and development of advanced iOS and Android applications using Swift and Kotlin. The position involves architecting scalable mobile solutions, ensuring high code quality, and driving best practices across the development lifecycle. You will also provide technical leadership while delivering secure, high-performance mobile applications. 🗂️ Requirements: 3+ years experience with Swift for iOS development, 3+ years experience with Kotlin for Android development, Experience leading or mentoring development teams, Experience with RESTful APIs and backend integration, Experience with third-party libraries, Experience with CI/CD pipelines, Experience with automated testing, Experience with deployment processes, Knowledge of mobile architecture best practices, Experience with performance optimization and debugging, Knowledge of mobile security best practices 📃 Skills: Swift, Kotlin, iOS, Android, REST, CICD, APIs, AutomatedTesting, Deployment, Architecture, Security, Libraries, Backend 🏢 Description: We are looking for a highly skilled Senior/Lead Mobile Developer with deep expertise in Swift/Kotlin to join our mobile development team. In this role, you will lead the design, development, and optimization of cutting-edge applications, ensuring best practices in architecture, code quality, and user experience. You will mentor junior developers, collaborate with cross-functional teams, and play a key role in shaping our mobile strategy. Responsibilities Lead the design, development, and deployment of advanced iOS and Android applications using Swift and/or Kotlin Architect robust, scalable, and maintainable codebases, ensuring adherence to best practices and coding standards Collaborate with product managers, designers, and backend engineers to deliver seamless user experiences Mentor and guide junior developers, conducting code reviews and providing technical leadership Stay up-to-date with the latest iOS/Android trends, technologies, and best practices Troubleshoot, debug, and optimize application performance Ensure the security and privacy of user data in compliance with industry standards Requirements Extensive experience developing iOS applications with Swift (3+ years) Extensive experience developing Android applications with Kotlin (3+ years) Proven track record of leading or mentoring development teams Experience with RESTful APIs, third-party libraries, and integration of backend services Familiarity with CI/CD pipelines, automated testing, and deployment processes Good work ethic and strong sense of ownership of the end result Excellent verbal and written communication skills, B2 level of English 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 Java Developer role focused on building and maintaining Java-based microservices, APIs, and data integration solutions in a hybrid B2B setup. The position involves ETL processes, database operations, and collaboration in a DevOps-driven environment. Experience with Java, Spring Boot, Kafka, PostgreSQL, and cloud-native tools is required. 🗂️ Requirements: 8+ years of software development experience, Java, Spring Boot, Microservices architecture, API development, Kafka, PostgreSQL, SQL, DataStage, Kubernetes, Jenkins, Bitbucket, DevOps experience, Fluent English 📃 Skills: Java, Spring, Kafka, PostgreSQL, SQL, DataStage, Kubernetes, Jenkins, Bitbucket, Microservices, APIs, ETL, DevOps 🏢 Description: Senior Java Developer Location: Hybrid (2 days/week from Warsaw, Gdańsk, Gdynia, or Łódź) Contract: B2B via Experis Start Date: ASAP / up to 30 days notice period Responsibilities Develop and maintain data integration solutions and data flow processes Build and enhance Java-based microservices and APIs Support ETL processes and database operations Collaborate in a DevOps-driven environment Requirements 8+ years of experience in software development Strong experience with Java and Spring Boot Experience with microservices architecture and APIs Knowledge of Kafka Experience with PostgreSQL and SQL Knowledge of DataStage (ETL) Familiarity with Kubernetes, Jenkins, and Bitbucket DevOps mindset Strong communication and teamwork skills Fluent English Nice to Have Experience in the banking or financial industry Benefits Medicover healthcare Multisport card Group life insurance Access to e-learning platform

🏢 Summary: Short-term B2B contract for a Mid iOS Developer to build and optimize a mobile application for the restaurant industry using native iOS and shared business logic with Kotlin Multiplatform. The role focuses on integrating KMP modules, developing UI in UIKit and SwiftUI, and delivering high-quality, testable code within a 4-week project. Direct collaboration with an international client team is required. 🗂️ Requirements: Minimum 3 years of commercial iOS development experience, Hands-on experience with Kotlin Multiplatform (KMP), Strong knowledge of Swift, Experience with UIKit, Experience with SwiftUI, Knowledge of reactive programming paradigms, Experience with SPM, Experience with CocoaPods, Experience with Carthage, Knowledge of MVVM architecture, Knowledge of MVC architecture, Experience with REST API integration, Understanding of client-server architecture, Experience with Code Signing, Experience with App Store Connect, Experience with Dependency Injection, Ability to write Unit Tests 📃 Skills: Swift, Kotlin, KMP, UIKit, SwiftUI, MVVM, MVC, REST, SPM, CocoaPods, Carthage, DependencyInjection, UnitTesting, CodeSigning, AppStoreConnect, Reactive, ClientServer, Xcode 🏢 Description: Mid iOS Developer (KMP / Swift) – Projekt 4 tyg. Dla naszego Klienta poszukujemy doświadczonego Mid iOS Developer a Jeśli masz min. 3 lata doświadczenia, świetnie znasz ekosystem Apple, a technologia Kotlin Multiplatform (KMP) nie jest Ci obca – to projekt idealny dla Ciebie! Szczegóły kontraktu: Stawka: 100 – 115 zł/h netto (+ VAT) na B2B Start projektu: 13.07 Czas zaangażowania: 4 tygodnie (z opcją przedłużenia przy kolejnych etapach) Wymagany język angielski: B2/C1 (płynna, bezpośrednia komunikacja z klientem końcowym) O projekcie: Dołączysz do zespołu realizującego zaawansowane rozwiązanie mobilne dla branży gastronomicznej. Projekt łączy natywny development iOS z współdzieloną logiką biznesową (KMP), dlatego nasz Klient szuka osoby, która sprawnie porusza się w takim środowisku i potrafi dowozić stabilny kod w krótkim czasie. Twój zakres obowiązków: Rozwój i optymalizacja aplikacji iOS dla klienta z branży restauracyjnej. Integracja współdzielonej logiki biznesowej za pomocą KMP . Tworzenie UI z wykorzystaniem UIKit oraz SwiftUI . Praca z architekturą klient-serwer oraz integracja z REST API . Zapewnienie wysokiej jakości kodu poprzez pisanie testów jednostkowych. Bezpośrednia komunikacja z zagranicznym zespołem klienta w języku angielskim. Nasze oczekiwania (Must-have): Min. 3-letnie doświadczenie zawodowe w programowaniu na iOS. Znajomość KMP (Kotlin Multiplatform) – warunek konieczny. Dobra znajomość języka Swift oraz frameworków UIKit i SwiftUI . Znajomość paradygmatów programowania reaktywnego. Doświadczenie z menedżerami pakietów: SPM / CocoaPods / Carthage . Praktyczna znajomość wzorców architektury (np. MVVM, MVC ). Doświadczenie z REST API i architekturą klient-serwer. Dobra znajomość procesów Code Signing oraz App Store Connect . Doświadczenie w pracy z Dependency Injection . Umiejętność pisania testów jednostkowych (Unit Tests). Znajomość języka angielskiego na poziomie min. B2/C1 (swobodna komunikacja biznesowa i techniczna). Mile widziane (Nice-to-have): Znajomość mobilnych baz danych ( Realm / Core Data / Couchbase ). Umiejętność pisania testów UI oraz Snapshot. Praktyczne doświadczenie z narzędziami CI/CD . Znajomość narzędzi do generowania projektów (np. Tuist, XcodeGen). Znajomość architektury TCA (The Composable Architecture) . Aktywny wkład w projekty Open Source.

🏢 Summary: B2B contract opportunity for a Regular or Senior Android Native Developer to design, build, and maintain scalable native Android applications using modern technologies. The role involves end-to-end mobile development, CI/CD implementation, testing, performance optimization, and publishing apps to Google Play Store in a collaborative environment. Remote work with periodic on-site presence in Kraków. 🗂️ Requirements: Proven experience delivering native Android applications, Strong expertise in Kotlin, Solid knowledge of Java, Excellent knowledge of Android SDK, Strong understanding of Jetpack or Jetpack Compose, Experience with Android Studio, adb, Android Emulator, Experience writing unit and automated tests, Experience building and maintaining CI/CD pipelines, Experience publishing applications to Google Play Store, Knowledge of JSON and XML, Experience implementing mobile security best practices, Understanding of mobile accessibility standards, Experience with Test-Driven Development 📃 Skills: Kotlin, Java, Android, SDK, Jetpack, Compose, CI/CD, AndroidStudio, adb, Emulator, JSON, XML, TDD, Git, IntelliJ, VSCode 🏢 Description: In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are looking for an experienced Android Native Developer to join our client’s mobile development team. The ideal candidate will have a strong track record of building and delivering high-quality native Android applications using modern Android technologies. You will be responsible for designing, developing, testing, and maintaining scalable mobile applications while collaborating closely with designers, product teams, and backend engineers. This role requires deep expertise in Kotlin , modern Android architecture, and the Android development ecosystem, along with experience implementing CI/CD pipelines and publishing applications to the Google Play Store. Project information: Location: Kraków, Poland Work Setup: Remote work with on-site presence required – approximately 6 days per month at the client’s office Two open vacancies: Regular developer and Senior Developer Rate: 120 – 135 PLN/net/h + VAT (B2B contract) Start date: depending on candidate availability Language: English (min B2) Project scope: Design, develop, and maintain native Android applications using modern Android development practices. Build high-quality, scalable mobile applications using Kotlin, Android SDK, and Android Jetpack / Jetpack Compose. Implement responsive and accessible mobile UI based on provided design specifications using native Android components and design systems. Develop, maintain, and optimize CI/CD pipelines for mobile applications. Write unit tests and automated tests to ensure application stability and reliability. Debug, profile, and optimize Android applications for performance and stability. Work with mobile development tools such as Android Studio, adb, and the Android Emulator. Handle data serialization and deserialization using JSON and XML. Manage application publishing, versioning, and certificate management in the Google Play Store. Implement security best practices and mobile security features. Collaborate with cross-functional teams including product managers, designers, and backend engineers. Follow Test-Driven Development (TDD) principles and maintain high code quality standards. Requirements: Proven experience delivering native Android mobile applications. Strong expertise in Kotlin and solid knowledge of Java for Android development. Excellent understanding of the Android platform, SDK, and Jetpack / Jetpack Compose. Experience with Android Studio, adb, and Android Emulator. Experience writing unit and automated tests for Android applications. Strong debugging and troubleshooting skills. Experience building and maintaining CI/CD pipelines for mobile applications. Experience publishing applications to the Google Play Store. Good knowledge of mobile accessibility standards. Experience working with JSON and XML data formats. Experience implementing mobile security best practices. Passion for Test-Driven Development (TDD) and writing maintainable code. Preferred Experience: Experience using Git and working with IDEs such as IntelliJ and Visual Studio Code. Experience working with mobile component libraries. Familiarity with iOS native development (Swift, SwiftUI, Xcode). Familiarity with cross-platform frameworks such as React Native or Flutter. Preferred Skills / Competencies: Experience designing and building digital products in onboarding or banking/financial services environments. Experience using AI-assisted development tools such as GitHub Copilot or Claude CLI. Strong problem-solving skills and attention to detail. We offer: Full-time job agreement based on B2B Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance

🏢 Summary: Software Engineer role in a long-term international project, working in a cross-functional team responsible for full product lifecycle from design to production support. The position involves backend and frontend development using modern technologies in an iterative delivery model. Hybrid work model with 5 days per month in the office. 🗂️ Requirements: Minimum 5 years of commercial software development experience, Experience with at least one programming language: Kotlin, Python, or JavaScript, Willingness to work across backend and frontend technologies, Working knowledge of Unix/Linux environments, Understanding of databases: MongoDB, Redis, PostgreSQL, Experience with HTTP APIs and RESTful services, Ability to provide production support and troubleshoot performance and security issues, Good English communication skills 📃 Skills: Kotlin, Python, JavaScript, Unix, Linux, MongoDB, Redis, PostgreSQL, REST, HTTP, .NET, C# 🏢 Description: Software Engineer (Kotlin / Python / JavaScript) Location: Kraków or Warsaw (hybrid — 5 days per month in the office) Contract type: B2B — 130–140 PLN/h Project: Long-term international project About the Role We are looking for a Software Engineer to join a collaborative product team working in an iterative delivery model. The team is responsible for the full lifecycle of the product — from design and development to production support — following the principle: “you build it, you support it.” This role offers an opportunity to work with modern technologies across backend and frontend, while continuously learning new programming languages and tools. Key Responsibilities Work in a cross-functional team of 4–6 engineers Break down requirements into user stories and deliver iteratively to production Design technical solutions aligned with architectural guidelines Provide production support, including troubleshooting bugs, performance, and security issues Identify and manage technical debt alongside new feature development Collaborate closely with team members, including pair programming Ensure high quality and maintainability of delivered solutions Requirements Minimum 5 years of relevant commercial experience Experience with at least one programming language (Kotlin, Python, or JavaScript preferred) Willingness to learn multiple technologies across backend and frontend Working knowledge of Unix/Linux environments Understanding of databases from a usage perspective (MongoDB, Redis, PostgreSQL) Experience with HTTP APIs (RESTful services) Good English communication skills (team communication in English) Nice to Have Knowledge of .NET / C# What We Offer Hybrid work model — only 5 days per month from the office (Kraków or Warsaw) Private medical care (Medicover) Sports card (Multisport or equivalent) Life insurance Long-term, stable cooperation Opportunity to work with modern technologies in an international environment Support for professional development and learning