React Native Developer @ Britenet

2 days ago

Katowice, Czech Republic Britenet Full time

Minimum 4 years of experience in React Native and 5+ years in general frontend development (JavaScript/TypeScript, HTML, CSS). Strong knowledge of React Native, including best practices for developing cross-platform mobile applications (iOS + Android). Experience in integrating mobile applications with IoT devices, including: reading device parameters (temperature, operating modes, energy consumption, historical data), controlling the device from within the app (schedules, on/off, operating mode settings), data synchronization with a cloud backend, handling push notifications. Ability to work with backends, microservices, and IoT platforms, including 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 processes (e.g., Bitrise, GitHub Actions, Fastlane). Familiarity with tools for monitoring and debugging mobile applications. Ability to ensure application and communication security, including user authentication, data encryption, and protection of communication channels between the app, device, and cloud. Application performance optimization, including startup time, bundle size, responsiveness, offline mode handling, and connectivity issue management. Fluent English (B2). Project for international client from the heating, ventilation, and air conditioning (HVAC) technology industry. The project involves the development of a cross-platform mobile application (iOS + Android) using React Native for end users, which integrates with the company’s IoT devices. Location: Readiness to work in a hybrid work model (once a week at the client's office in Katowice). ,[Design, development, and maintenance of mobile applications using React Native for iOS and Android platforms., Implementation of new features and optimization of existing solutions in terms of performance, security, and scalability., Integration of mobile applications with IoT devices., Participation in projects focused on developing multi-brand and multi-language applications for various markets., Creation and maintenance of unit and integration tests, as well as automation of deployment processes in a CI/CD environment., Monitoring, analysis, and debugging of application performance using appropriate tools., Ensuring a high level of application security – user authentication, data encryption, and protection of communication channels., Optimization of application performance regarding startup time, bundle size, responsiveness, offline mode support, and connectivity handling.] Requirements: React Native, JavaScript, CSS, HTML, CI/CD, Architecture, Redux, UX/UI, GraphQL, TypeScript, React Navigation, MobX Additionally: Sport subscription, Private healthcare, International projects.

  • Frontend Developer @ Shiji Poland

    1 week ago

    Katowice, Czech Republic Shiji Poland Full time

    Minimum 4 years’ experience as JavaScript or Front-End Developer Experience with React ecosystem (React hooks) Advanced understanding of JavaScript ES6/TypeScript Good knowledge of HTML5, CSS3 Experience in work with or contribute to a JavaScript based build system (e.g., Babel, Webpack)Interest in testing, review and code quality Familiar with Git SOLID...

  • Fullstack Developer

    2 weeks ago

    Warszawa, Wrocław, Poznań, Katowice, Czech Republic Scalo Full time

    Ta oferta jest dla Ciebie, jeśli: posiadasz minimum 3 lata doświadczenia zawodowego w roli Fullstack Developera, masz praktyczną znajomość .NET, .NET Core, sprawnie tworzysz aplikacje frontendowe z użyciem React + Redux (JavaScript, TypeScript), dobrze znasz relacyjne bazy danych, w szczególności MS SQL (Transact-SQL, Entity Framework, Dapper),...

  • Java Developer with German

    1 week ago

    Katowice, Czech Republic Reply Polska Full time

    Very good communication skills in English and German, expected level: B2. Successful completion of higher education as a qualified IT specialist or university degree in computer science. At least 4 years of project experience with JVM tech stack, ideally with a subset of the following technologies and frameworks:  Java, Spring Boot, Kafka, SQL, REST,...

  • Senior Front-end Developer @ Shiji Poland

    2 days ago

    Katowice, Czech Republic Shiji Poland Full time

    At least 2 years of experience in a senior-level role, taking ownership of architectural decisions, mentoring, and delivering production-grade solutions. Advanced understanding of TypeScript and modern JavaScript (ES6+). Proven experience in frontend architecture design, applying DDD, CQRS, event-driven, and layered architecture principles. Ability to...

  • Senior Backend Developer

    2 weeks ago

    Katowice, Czech Republic Reply Polska Full time

    Successfully completed a degree in computer science, mathematics, physics, or a comparable field of study 4+ years of experience in backend development with Kotlin or Java (willingness to work in Kotlin required) Proficiency in Spring Boot and working with PostgreSQL Experience in microservice architectures and Domain-Driven Design (DDD) Hands-on...

  • .NET Developer @ Forte

    2 weeks ago

    Kraków, Katowice, Czech Republic Forte Full time

    Czego oczekujemy od Ciebie? Co najmniej 3-letniego doświadczenia na stanowisku programisty; Dobrej znajomości C# oraz .NET; Doświadczenia w programowaniu obiektowym (OOP); Znajomości Git i narzędzi takich jak AzureDevOps, Gitlab lub Jira; Doświadczenia i chęci testowania kodu (unit tests, integration tests); Pozytywnego nastawienia do pracy w zespole...

  • Senior Fullstack Developer

    2 weeks ago

    Katowice, Czech Republic Reply Polska Full time

    Successfully completed a degree in computer science, mathematics, physics, or a comparable field of study 4+ years of professional experience as a fullstack developer Proficiency in TypeScript using NestJS/Node.js and Vue.js Experience working with PostgreSQL and DocumentDB (MongoDB) Understanding of REST APIs and microservice integration patterns...

  • .NET Developer @ Integral Solutions

    2 weeks ago

    Warszawa, Wrocław, Poznań, Katowice, Czech Republic Integral Solutions Full time

    Minimum 3 lata doświadczenia w pracy z .NET i .NET Core,  Dobra znajomość relacyjnych baz danych, w szczególności MS SQL (Transact-SQL, Entity Framework, Dapper),  Umiejętność tworzenia frontendów w React + Redux (JavaScript, TypeScript),  Znajomość technologii integracyjnych: WebAPI, WebServices, SOAP, REST,  Praktyczna znajomość narzędzi:...

  • Golang Senior Software Engineer @ Reply Polska

    2 weeks ago

    Katowice, Czech Republic Reply Polska Full time

    Relevant work experience in a similar environment developing distributed, highly available systems Proven experience with IaaS providers like Amazon Webservices, Google Compute Cloud or Microsoft Azure Fluent in at least one relevant programming language (ideally this is Golang, however, Rust is becoming increasingly interesting to us!) Successfully...

  • Cloud Engineer @ Reply Polska

    2 weeks ago

    Katowice, Czech Republic Reply Polska Full time

    Successfully completed University studies (Bachelor’s or Master’s Degree) in Computer Science, Engineering, Mathematics or comparable courses of study. You have good know-how and 1+ years of experience in Cloud Technologies (AWS, Kubernetes, etc.). Platform and Hosting: AWS -> EKS, RDS, MSK, Redis, EC2, Secret Manager. Certifications: AWS Practitioner...