React Native Developer

🏢 Summary: The offer is for an experienced Mobile Engineer to develop and iterate on a React Native mobile application in close collaboration with product teams, contributing to impactful solutions in the legal services domain. The role involves building and maintaining production-ready mobile apps with a strong focus on code quality and technical design. It is a fully remote B2B opportunity with mentorship support. 🗂️ Requirements: BSc in Computer Science, Software Engineering or related field, Minimum 5 years of experience in JavaScript, Minimum 5 years of experience in React Native, Experience with GraphQL, Experience with automatic testing frameworks, Published mobile applications in App Store or Google Play 📃 Skills: JavaScript, React, ReactNative, GraphQL, Node, Testing, iOS, Android 🏢 Description: We are looking for an experienced Mobile Engineer who is passionate about technology, is capable of breaking down complex problems, and has a strong will to get things done. You will be part of the team working closely with product and various functions in the company to rapidly iterate on our product and find the best solutions. Join us as we disrupt the legal services industry, if you want to apply your coding and tech design skills to make a significant positive impact on people during their key life events. Requirements: BSc in Computer Science, Software Engineering or related field At least 5 years of experience in JavaScript, React Native – a must Experience with GraphQL Experience with Node- nice to have Experienced with automatic testing frameworks Developing apps that are currently in the App Store or Google Play Offer: Cooperation based on a B2B contract. 100% remote work. The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card).

🏢 Summary: Seeking an experienced Mobile Engineer to build and iterate on a React Native-based mobile platform in the legal tech industry, focused on simplifying access to legal services. The role involves close collaboration with product teams to design, develop, and optimize mobile applications published on app stores. This is a fully remote B2B opportunity for a senior-level developer. 🗂️ Requirements: BSc in Computer Science or related field, Minimum 5 years of experience in JavaScript, Minimum 5 years of experience in React Native, Experience with GraphQL, Experience with Node, Experience with automated testing frameworks, Experience delivering apps to App Store or Google Play 📃 Skills: JavaScript, ReactNative, GraphQL, Node, Testing, iOS, Android 🏢 Description: Join the client's team in the legal tech industry and help build a mobile platform that simplifies access to legal services during key life events. RESPONSIBILITIES We are looking for an experienced Mobile Engineer who is passionate about technology, is capable of breaking down complex problems, and has a strong will to get things done. You will be part of the team working closely with product and various functions in the company to rapidly iterate on our product and find the best solutions. Join us as we disrupt the legal services industry, if you want to apply your coding and tech design skills to make a significant positive impact on people during their key life events. REQUIREMENTS BSc in Computer Science, Software Engineering or related field At least 5 years of experience in JavaScript, React Native – a must Experience with GraphQL Experience with Node Experienced with automatic testing frameworks Developing apps that are currently in the App Store or Google Play WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. 100% remote work. The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.

🏢 Summary: The role involves designing and maintaining automated test solutions for mobile applications across iOS and Android platforms. The engineer will build mobile automation frameworks, execute comprehensive test suites, and integrate automated tests into CI/CD pipelines. The position focuses on ensuring quality, performance, and reliability of native, hybrid, and web-based mobile apps. 🗂️ Requirements: Proven experience in mobile test automation, Hands-on experience with Appium, Espresso, or XCUI Test, Strong programming skills in Java, Kotlin, Swift, Python, or C#, Solid understanding of iOS and Android platforms, Experience with CI/CD tools, Experience with Git-based version control, Hands-on experience with Xcode and Android tooling, Experience with cloud-based device farms, Ability to design automated tests for native mobile applications 📃 Skills: Appium, Espresso, XCUITest, Java, Kotlin, Swift, Python, C#, iOS, Android, Jenkins, AzureDevOps, Git, Xcode, BrowserStack 🏢 Description: Mobile Test Automation Engineer About the Role We are looking for a Mobile Test Automation Engineer with strong hands-on experience in automating tests for mobile applications. In this role, you will work closely with mobile engineering teams to ensure high quality, performance, and reliability of mobile solutions across platforms and devices. Key Responsibilities Design, develop, and maintain automated test solutions for native, hybrid, and web-based mobile applications . Build and enhance mobile automation frameworks , leveraging BDD approaches and mobile-focused testing tools. Analyze mobile application architecture to create effective, device- and OS-aware test scenarios . Develop and execute functional, regression, and end-to-end test cases for mobile apps and supporting backend services. Prepare and maintain test environments, manage test data, and ensure readiness for mobile test execution. Conduct compatibility, performance, and accessibility testing across a wide range of devices and operating systems. Integrate automated mobile tests into CI/CD pipelines to support fast and reliable releases. Identify, document, and track defects; generate test reports and support release sign-off activities. Monitor QA metrics for mobile products and drive continuous quality improvements. Collaborate closely with Mobile Engineering and Solution Architecture teams to address platform-specific challenges. Share knowledge by mentoring team members and promoting best practices in mobile test automation. Required Skills & Experience Proven experience in mobile test automation using tools such as Appium, Espresso, and XCUI Test . Strong programming skills in Java or other object-oriented languages such as Kotlin, Swift, Python, or C# . Solid understanding of mobile platforms ( iOS and Android ) and their testing considerations. Experience with CI/CD tools (e.g. Jenkins, Azure DevOps) and Git-based version control . Hands-on experience with Xcode for iOS testing and Android tooling. Familiarity with cloud-based device farms (e.g. BrowserStack) for cross-platform and parallel test execution. Ability to design robust automated tests for native iOS and Android applications in cloud and local environments. Strong analytical skills, attention to detail, and a collaborative mindset.

🏢 Summary: Mobile Application Engineer role focused on building and maintaining React Native applications for iOS and Android within the gaming and casino domain. The position involves developing new features, improving user experience, and delivering end-to-end solutions in collaboration with backend engineers, product managers, and designers. The engineer will contribute to launching new brands and expanding products into new markets. 🗂️ Requirements: Minimum 5 years of mobile development experience for Android and iOS, Strong experience with React Native or React, Proficiency in TypeScript, Strong understanding of core JavaScript principles, Experience with cloud integrations, Experience with REST APIs, Experience with GraphQL, Experience with Datadog, Experience with Firebase, Experience with version control systems 📃 Skills: React, ReactNative, TypeScript, JavaScript, REST, GraphQL, Datadog, Firebase, CI/CD, Git, Android, iOS, Cloud 🏢 Description: ABOUT THE ROLE We're looking for a Mobile Application Engineer, specializing in React Native, with a mobile-first mindset and an understanding of native development to help drive our projects forward. As a part of the Gaming team, you would be an important cog in the machinery, creating new features for the casino vertical of our sites and its lobby. You will be part of driving a newly created frontend team within Gaming to deliver products and features end to end together with our backend engineers. In close collaboration with product managers, designers and our backend peers, we get to work with a broad variety of initiatives where we are aiming to level up our Casino site to the next level. YOU WILL BE RESPONSIBLE FOR: Develop and maintain high-quality React native applications for both iOS and Android platforms Ensure a smooth, engaging, and intuitive user experience Work on apps for LeoVegas brands such as BetMGM, BetUK, and Expekt Improve and enhance applications with a strong product focus Contribute to launching new brands and expanding into new markets OUR SUCCESSFUL CANDIDATE WILL HAVE THE FOLLOWING: ESSENTIAL SKILLS At least 5 years of experience working as a mobile developer for Android and iOS Strong experience with React Native preferred, will consider React only experience Proficiency in TypeScript Good understanding of core JavaScript principles and concepts Experience with cloud integrations Experience with Rest API, Datadog, GraphQL, Firebase and version control NICE TO HAVES Experience writing Unit Tests Hands-on experience optimizing mobile performance Experience with CI/CD integrations WHO WE ARE At the core of LeoVegas Group is Team Leo. Our culture is our foundation and is what enables us to innovate, build, and lead as we trailblaze our way through the igaming industry. We’re a team of over 1400 innovators, initiators, and groundbreakers working in a fast-paced and agile environment across 11 offices worldwide. WHAT WE OFFER Hybrid work policy (3 days a week from office in Warsaw) 4 weeks of Workation  (T&C apply) Competitive base salary Benefits package - 800 PLN net (B2B)/gross (UOP) monthly Our office provides complimentary snacks and drinks; on Mondays, we serve complimentary breakfast. Team and office social events throughout the year Equipment: MacBook + smartphone (iPhone 15 or Samsung Galaxy S24) JOIN US! In our pride, we empower our teammates to find their roar and run with their wildest ideas. We don’t wait for things to happen; we pounce and make it happen! Would you be a good fit for the Leo Pride - give us a roar! As our company working language is English, we’d like to see your CV in English, please

🏢 Summary: Mid+/Senior React Native Developer role focused on building and maintaining mobile applications in the energy and e-mobility domain. The position involves architectural decision-making, CI/CD setup, and integration with backend services for scalable B2B and B2C solutions. You will contribute to modern energy systems and EV charging applications with real-world impact. 🗂️ Requirements: Minimum 4 years of commercial experience in mobile development, Very good knowledge of React Native and Expo, Strong knowledge of TypeScript, Understanding of iOS and Android platforms and publishing process, Experience with CI/CD pipelines for mobile applications, Experience with REST or GraphQL API integration, Knowledge of state management and React Native patterns, Experience with unit and integration testing, Ability to design application architecture independently 📃 Skills: React, ReactNative, Expo, TypeScript, JavaScript, iOS, Android, CI/CD, Fastlane, GitHubActions, EAS, REST, GraphQL, Redux, Zustand, ReactNavigation, ReactQuery, Jest, TestingLibrary, ESLint 🏢 Description: We are looking for a React Native Developer (Mid+/Senior) with very strong knowledge of the React Native and Expo ecosystem to join our team. We are seeking a versatile, technically mature person who can independently make architectural decisions. Experience in developing native applications for iOS and/or Android platforms (e.g., previous role as an iOS/Android Developer) is welcome but not required. We operate in the energy and e-mobility sector, including the development of: Charge Point Management Systems (CPMS) Virtual Power Plants (VPP) Demand Response solutions or other similar systems Requirements Minimum 4 years of commercial experience in mobile application development Very good knowledge of React Native and Expo Understanding of the mobile application lifecycle (development, build, testing, release) and the specifics of iOS and Android platforms, including limitations and requirements related to publishing and maintaining apps in the App Store and Google Play Practical experience in designing, configuring, and maintaining CI/CD pipelines for mobile applications, including automation of builds, testing, and release processes (e.g., Fastlane, GitHub Actions, EAS) Strong knowledge of TypeScript Experience integrating with backend/API (REST / GraphQL, authentication, caching) Knowledge of popular React Native libraries and patterns (e.g., Redux / Zustand, React Navigation, React Query) Experience maintaining code quality: writing unit/integration tests (Jest, Testing Library), using linters, participating in code reviews Ability to work in a team and independently solve problems Experience in projects related to e-mobility or renewable energy sources What will you do? As a Mobile Software Engineer at Codibly , you will participate in exciting projects combining energy and new technologies. Together with our interdisciplinary team of experts, you will be involved in: Participating in e-mobility projects as well as building modern energy solutions Optimizing electric vehicle charging infrastructure Implementing innovative energy storage and distribution algorithms Integrating renewable energy sources Building internal products and developing systems from scratch Working with well-known global brands No purely support or body-leasing projects Employment stability with the possibility to change projects Leadership and consulting career paths Participation in AI solution implementations and organizational transformation In the area of e-mobility application development, we guarantee: Development and maintenance of mobile applications in React Native / Flutter Cooperation with product, backend, and UX/UI teams Ensuring code quality, performance, and application stability Participation in product planning and technical decision-making Code reviews and knowledge sharing within the team We develop modern mobile applications for B2B and B2C users who use fuel cards, loyalty programs, and dedicated discounts. The projects have a real impact on the daily work of drivers and customers - the applications support them both on the road and while using charging infrastructure.

🏢 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: The role focuses on integrating React Native solutions into an existing native iOS/Android mobile platform, designing architecture and implementing hybrid modules within a mature codebase. The position involves bridging React Native and native layers, optimizing performance, and contributing to scalable, maintainable mobile architecture. 🗂️ Requirements: Strong commercial experience with React Native, Experience in native mobile development (iOS and/or Android), Understanding of mobile application architecture, Experience integrating React Native with native applications, Ability to implement cross-layer communication and bridging, Experience with navigation and state management, Familiarity with CI/CD processes and build tools, Focus on code quality and performance optimization 📃 Skills: React, ReactNative, JavaScript, TypeScript, iOS, Android, Swift, Kotlin, Objective-C, Java, CI/CD, Git, Xcode, Gradle 🏢 Description: We are looking for an experienced React Native Developer to support the integration of React Native solutions into an existing native mobile platform (iOS/Android). Responsibilities: Designing and implementing an architectural approach to combine React Native components with the native application Analyzing the current mobile architecture and identifying optimal integration points Implementing and developing React Native modules within the existing native codebase Ensuring scalability, performance, and maintainability of the solution Handling communication between native and React Native layers (data flow, bridging) Contributing to and optimizing build/deployment processes Maintaining high code quality and alignment with platform standards Close collaboration with iOS and Android teams to ensure smooth integration of new features Requirements: Strong knowledge of React Native with proven commercial experience Experience in native mobile development (iOS and/or Android) Solid understanding of mobile application architecture Experience integrating hybrid solutions with native applications Ability to work with navigation, state management, and cross-layer communication Familiarity with CI/CD processes and build tools Strong focus on code quality, performance, and readability Good teamwork and communication skills Nice to have: Experience working with large, existing mobile systems Knowledge of mobile performance optimization best practices Experience working in Agile environments We offer: Opportunity to work on a modern mobile platform Collaboration with an experienced development team Real impact on architecture and product direction Flexible working conditions

🏢 Summary: Senior React Native Engineer role focused on building and scaling high-performance mobile applications using a modern tech stack. The position involves developing new features, contributing to architectural decisions, and ensuring code quality through testing and best practices. The role requires close collaboration with cross-functional teams to deliver reliable, production-ready apps. 🗂️ Requirements: 5+ years of software development experience, Strong expertise in React Native, Proficiency in JavaScript and TypeScript, Experience building production-ready mobile applications, Understanding of mobile UI/UX optimization, Experience with performance tuning, Familiarity with HTML and CSS/SASS, Basic knowledge of React, Experience with backend integration, Experience with SQL databases, Experience with API integration, Ability to write unit tests, Strong debugging and troubleshooting skills, Fluent English (B2/C1 minimum) 📃 Skills: ReactNative, JavaScript, TypeScript, HTML, CSS, SASS, React, SQL, APIs, UnitTesting, Debugging, Mobile, UI, UX, Performance, Backend 🏢 Description: Senior React Native Engineer We’re looking for an experienced Senior React Native Engineer to join our team and contribute to a new project built with a modern tech stack. If you’re motivated by creating meaningful solutions and enjoy working on impactful products, we’d love to hear from you! What you’ll do: Build and maintain mobile applications using React Native, ensuring clean, scalable, and well-documented code Develop new features and enhance existing ones for high-performance and reliable apps Participate in architectural discussions and technical decision-making Write and maintain unit tests to guarantee code quality and stability Collaborate closely with product managers, designers, and stakeholders to deliver impactful solutions Review peers’ code, provide feedback, and encourage engineering best practices What you bring: 5+ years of professional experience in software development, with strong expertise in React Native Solid knowledge of JavaScript/TypeScript and proven experience building production-ready apps Understanding of mobile UI/UX optimization and performance tuning Familiarity with HTML, CSS/SASS , and cross-platform design principles Basic knowledge of React , and backend stack Experience with SQL databases and API integration Strong debugging, problem-solving, and troubleshooting skills Excellent collaboration skills and ability to work in an international team Fluent English (B2/C1 level minimum) Benefits: multisport medical care insurance remote work

🏢 Summary: Development of a cross-platform mobile application in React Native for iOS and Android integrated with IoT devices and cloud backends. The role focuses on building, integrating, and optimizing a scalable mobile app with device control, data synchronization, and secure communication. It includes testing, CI/CD automation, and performance optimization in a multi-brand, multi-language environment. 🗂️ Requirements: Minimum 4 years of experience in React Native, Minimum 5 years of experience in frontend development, Strong knowledge of cross-platform mobile development for iOS and Android, Experience integrating mobile apps with IoT devices, Experience with cloud backend integration and microservices, Experience with push notifications and data synchronization, Knowledge of mobile testing and test automation, Experience with CI/CD pipelines, Knowledge of mobile app security and data encryption, Experience with performance optimization of mobile applications, English level B2 minimum, Availability to work from office in Katowice once per week 📃 Skills: React, ReactNative, JavaScript, TypeScript, HTML, CSS, Redux, MobX, ReactNavigation, GraphQL, IoT, Microservices, CI/CD, Bitrise, GitHubActions, Fastlane, Testing, Automation, Encryption, Authentication 🏢 Description: Development of a cross-platform mobile application (iOS + Android) in React Native for end-users, integrating with the company's IoT devices. Our expectations Minimum 4 years of experience in React Native and 5+ years in general frontend development (JavaScript/TypeScript, HTML, CSS). Strong proficiency in React Native, including best practices for cross-platform mobile application development (iOS + Android). Experience in integrating mobile applications with IoT devices, including: Reading device parameters (temperature, operating modes, energy consumption, historical data). Controlling devices via the app (schedules, power on/off, operating mode settings). Data synchronization with cloud backends and handling push notifications. Ability to work with backends, microservices, and IoT platforms, including the implementation of business logic and network communication. Experience with multi-brand and multi-language applications, scalable across different markets. Knowledge of mobile and integration testing, test automation, and CI/CD (e.g., Bitrise, GitHub Actions, Fastlane). Familiarity with mobile application monitoring and debugging tools. Ability to ensure application and communication security (user authentication, data encryption, securing communication channels between the app, device, and cloud). Application performance optimization: startup time, bundle size, responsiveness, offline mode support, and connectivity issue handling. English min. B2 level Ready to work from the office in Katowice 1x/week (the team meets on Wednesday) Welcome Skills Proficiency in TypeScript, Redux / MobX, React Navigation, and GraphQL. Experience working with applications requiring high scalability and integration with cloud platforms. Knowledge of UX/UI principles specifically for mobile applications. Experience in migrating existing applications to React Native or modernizing the technology stack. Knowledge of security standards for mobile and IoT applications.

🏢 Summary: The role involves developing a React Native mobile application for smart energy management, integrating IoT devices and analytics features. You will build high-performance UI components, enable secure communication with HVAC hardware, and implement data visualization modules while collaborating on Azure-based REST APIs. 🗂️ Requirements: 5+ years of commercial experience with React Native, Experience building mobile UI components and application architecture, Knowledge of secure communication between mobile apps and IoT/hardware systems, Experience with REST API integration and JSON data handling, Ability to optimize mobile app performance and troubleshoot bottlenecks, Fluency in English, Residing in Poland 📃 Skills: React, ReactNative, JavaScript, TypeScript, REST, JSON, Azure, IoT, HVAC 🏢 Description: We are looking for a React Native Developer to join a project for a global energy‑tech leader. You will help build a mobile application that supports smart energy management in homes and commercial spaces. The role connects mobile development, IoT, and modern analytics features Your tasks Develop high‑performance, reusable UI components for mobile apps using React Native Implement secure and low‑latency communication between mobile devices and HVAC hardware Build data visualization modules for energy usage, savings, and indoor air quality insights Collaborate with backend developers to define and consume RESTful APIs hosted on Azure Diagnose and resolve performance issues in complex, data‑heavy scenarios Requirements At least 5 years of experience working with React Native in commercial projects Strong skills in building mobile UI components and app architecture Good understanding of secure communication between mobile apps and hardware/IoT systems Ability to work with API integrations and JSON data handling Experience optimizing app performance and troubleshooting bottlenecks Fluency in English Residing in Poland required