Senior React Native Developer

Welcome to The Codest!We are an innovative international tech software company with a strong presence in Poland, specializing in delivering cutting-edge IT solutions and projects globally. Our core philosophy revolves around placing "Customers and People First," ensuring that we prioritize our clients' needs while fostering a collaborative environment for our team members, which empowers us to provide outstanding products and services.Our expertise encompasses web development, cloud engineering, DevOps, and quality assurance. After years of successfully developing our flagship product, Yieldbird—which has proudly received accolades as a laureate of the prestigious Top25 Deloitte awards—we have committed ourselves to our mission: to assist tech companies in building impactful products and effectively scaling their IT teams by enhancing IT delivery performance. Our extensive experience with product development challenges has positioned us as experts in crafting digital products and scaling IT teams.But our ambition doesn't stop here; we are eager to expand our horizons. If you are driven by goals and are on the lookout for new opportunities, we invite you to join our team! Here, you will discover a nurturing and collaborative environment that supports your growth every step of the way.Project Overview:We are on the lookout for a skilled Senior React Native Developer with robust experience in React Native and Expo, who is prepared to take on a technical leadership role in our mobile projects.In this role, you will be responsible for delivering comprehensive mobile applications, making architectural decisions, integrating with existing APIs, and guiding the team in creating high-quality solutions.

Join Our Team!At Xebia, we are dedicated to fostering a culture of growth and innovation. With nearly twenty years of experience, we've been creating cutting-edge digital solutions for a diverse range of clients globally, including renowned brands like UPS, McLaren, Aviva, and Deloitte.Our enthusiasm for Cloud-based solutions drives us to collaborate with the leading Cloud service providers: Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). We proudly became the first AWS Premier Consulting Partner in Poland.Previously known as PGS Software, we merged with Xebia Group in 2021, uniting with like-minded companies that strive to make a significant impact in technology.At Xebia, we embody innovation and excellence, recognized worldwide for our thought leadership and the opportunity to engage in pioneering projects.Our mission is clear: we aim to be acknowledged as the authority in our field.What sets us apart? Our commitment to detail, a culture of continuous learning, and a belief in the potential of every team member – all focusing on their development. We invite you to visit us and experience our culture firsthand!We can't wait to learn more about you!Submit your resume to ignite a conversation and join the #Xebia community.Project Overview:The project involves developing a central control unit that integrates seamlessly with wireless room thermostats and actuators, providing users with an intuitive mobile application for remote control and monitoring. The system will ensure reliable communication across all components, optimizing performance.Your Responsibilities:Design, develop, and maintain high-quality mobile applications using React Native for both iOS and Android platforms.Engage in architectural decision-making to ensure scalable, maintainable, and efficient mobile solutions.Collaborate closely with product, design, and backend teams to translate requirements into actionable technical implementations.Maintain high code quality through code reviews, testing, and adherence to engineering best practices.Support the development of a mobile application for monitoring and controlling a connected system.

Join Us at Xebia!Xebia is a leading provider of innovative digital solutions, where expertise thrives. With nearly two decades of experience, we have delivered remarkable digital transformations for a diverse range of clients globally, including notable brands such as UPS, McLaren, Aviva, and Deloitte.Our commitment to excellence in Cloud-based solutions is demonstrated by our partnerships with major providers like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). We take pride in being the first AWS Premier Consulting Partner in Poland.Previously known as PGS Software, we became part of the Xebia Group in 2021, a collective of technologically driven companies dedicated to making a significant impact in the tech landscape.At Xebia, we prioritize innovation, a talented workforce, and technological superiority. Our reputation for thought leadership opens doors to work on groundbreaking global projects.Our mission is encapsulated in a single word: Authority. We strive for recognition as the premier authority in our field.What sets us apart? It’s our unwavering dedication to detail, passion for knowledge, and belief in individual potential. We focus on nurturing the growth of every team member. We invite you to visit us and experience our culture firsthand!We are eager to learn about you!Send us your resume to start a conversation and become part of the #Xebia team.Project Overview:The project involves developing a central control unit that integrates seamlessly with wireless room thermostats and actuators. Users will benefit from a straightforward interface, including a mobile app for remote control and monitoring, ensuring reliable communication between all components for optimal performance.Your Responsibilities:Design, develop, and maintain high-quality mobile applications using React Native for both iOS and Android platforms.Contribute to architectural decisions to ensure scalable, maintainable, and high-performance mobile solutions.Collaborate closely with product, design, and backend teams to transform requirements into technical implementations.Ensure high code quality through code reviews, testing, and adherence to best engineering practices.Support the development of a mobile application that allows monitoring and control of a connected system.

Flying Bisons is a premier Digital Consulting and Delivery firm located in the vibrant city of Warsaw, Poland. Our mission is to empower our clients to Unleash Digital Potential™. We specialize in discovering, defining, designing, and developing top-tier digital products that yield significant business outcomes, crafting digital experiences for millions globally.What sets us apart is our comprehensive end-to-end process, enabling us to tackle every challenge with the assurance that we deliver exceptional results. Our expertise spans Research, Digital Strategy, Branding, Content Creation (including Written, Photography, and Video), Product Design, Web and Mobile Development, Data Analytics, and Artificial Intelligence.Become a part of our dynamic team of 120 professionals as we co-create industry-defining products and exhilarating experiences for renowned brands(Mercedes AMG, IKEA, KFC, eObuwie, Żabka, Sanofi, Zain) and innovative startups(such as Booksy, Nethone, Telemedi, and DevSkiller).We are assembling a curated network of skilled freelance React Native Developers to collaborate on current and forthcoming projects. By applying to join our freelancer pool, you will undergo an evaluation process and remain in our records for future opportunities. While you may not be contacted immediately, when a project aligned with your expertise arises, you will be invited to participate, with the option to accept or decline based on your availability. If you are enthusiastic about joining our talented pool, please submit your CV. We will reach out once a fitting opportunity emerges.Are you a self-motivated and reliable professional? If so, we eagerly await your response!Contract type: B2B

Join HelloFresh in Warsaw and become a part of HelloTech, our global technology backbone that is home to over 1,000 professionals dedicated to developing the digital products that enhance our comprehensive food experience. Whether it's meal kits, ready-to-eat meals, or specialty offerings like pet food and premium meat & seafood, HelloTech builds the platforms that deliver customized food solutions to millions of customers each month. Our subscription-based, direct-to-consumer model is driven by technology at every stage, from user-friendly apps and personalization algorithms to pricing strategies, forecasting, supply chain efficiency, and initiatives aimed at minimizing food waste. While our brands operate independently to cater to unique customer requirements, they are unified by shared platforms, data, and operational excellence facilitated by HelloTech. HelloTech thrives on autonomous, cross-functional alliances, each responsible for a specific product or domain end-to-end. By collaborating with our Warsaw team, you will help design scalable, data-driven products utilized across various markets, employing a modern tech stack and international collaboration to constantly enhance how individuals discover, order, and enjoy HelloFresh’s offerings now and in the future.

Join HelloFresh in Warsaw as a Senior React Native Engineer within our innovative HelloTech team, a dynamic global technology hub comprised of over 1,000 skilled professionals. We create outstanding digital products that enhance the entire food experience for our customers. From meal kits to ready-to-eat options and specialty items like pet food and premium meats & seafood, HelloTech is dedicated to delivering customized food solutions to millions of consumers every month. Our subscription-based, direct-to-consumer model is powered by technology at every level, from our user-friendly applications and personalized services to advanced pricing strategies, precise forecasting, and supply chain optimization. Each of our brands operates independently to meet unique customer needs, yet they are all supported by shared platforms, data, and operational excellence fostered by HelloTech. At HelloTech, we thrive in autonomous, cross-functional alliances, each responsible for specific products or domains from start to finish. By collaborating with our Warsaw office, you will contribute to the development of scalable, data-driven products that enhance customer engagement across our diverse markets. You will work with a cutting-edge tech stack and international teams to continuously improve how users discover, order, and delight in HelloFresh’s offerings.

We are seeking a talented and motivated Staff Software Engineer specializing in React Native to join our dynamic team at Box, Inc. In this role, you will be instrumental in developing innovative mobile applications that enhance user experience and drive engagement.Your responsibilities will include collaborating with cross-functional teams to define and design new features, maintaining existing applications, and ensuring code quality through best practices and testing.

Aura is dedicated to fostering a safer online environment. With our suite of innovative digital safety products, we empower millions of users to protect themselves from emerging digital threats. Our dynamic team of over 400 professionals is driven by experienced leaders who have successfully scaled startups into billion-dollar enterprises.Join us on this journey to make the internet a safer place! About the Role:As a pivotal member of Aura's Direct-to-Consumer (D2C) Platform Experience & Growth team, you will play a key role in enhancing the core user experience. In your capacity as a Senior Software Engineer, you will leverage your expertise in React Native to develop engaging onboarding processes, dashboards, and security-focused features. This high-impact position entails collaboration with a Product Manager, where you will act as the technical authority, overseeing architecture, implementation, testing, and deployment. Your contributions will focus on creating configurable and scalable features that support rapid experimentation and informed decision-making, all while adhering to best practices that prioritize performance and stability.

Code & Pepper works with clients in FinTech, HealthTech, and AI, taking on projects that demand accuracy and dependable results. The team assists organizations in scaling their operations, refining platforms, and launching new features when deadlines are tight. Role overview The Senior Fullstack Developer (Ruby / React) will contribute to a SaaS platform designed to improve pharmacy operations. This platform addresses everyday challenges such as long customer lines, repeated phone inquiries, manual administrative work, and prescriptions left uncollected. What you will work on Enhancing features that allow pharmacies to process online payments and send automated prescription reminders Building tools that help pharmacies connect with patients more effectively Supporting the platform’s goal of increasing pharmacy sales through a unified, user-friendly application Location This is a remote position (praca zdalna).

Intellectsoft is a leading software development firm that has been delivering cutting-edge solutions since 2007. With a global presence across North America, Latin America, the Nordic region, the UK, and Europe, we specialize in various industries including Fintech, Healthcare, EdTech, Construction, and Hospitality. Our partnerships with startups, mid-sized businesses, and Fortune 500 companies enable us to drive innovation and scalability. Our impressive client roster features industry giants such as Jaguar Motors, Universal Pictures, and Harley-Davidson, where our dedicated teams make a tangible impact every day. Discover more about us at www.intellectsoft.net.About the Role: Join us as we develop an AI-powered platform that empowers businesses to enhance decision-making and operational efficiency. This platform leverages advanced analytics and machine learning to process vast data sets, delivering valuable insights and predictions. It is particularly impactful in sectors like healthcare, optimizing processes and customer experiences while fostering innovation. The platform seamlessly integrates with existing systems, enabling teams to make rapid, data-driven decisions.

Join Our Innovative Team as a Senior Fullstack Developer!At Telemedi, we are in search of talented Senior Developers to enhance our IT team as we embark on an exciting journey of organizational growth, focusing on programming with AI. As a Senior Developer, you'll skillfully navigate an AI-integrated IDE and excel at delivering significant business value through IT solutions while maintaining high programming standards.The era of traditional IT is over; a new phase in software development is upon us. Telemedi is at the forefront of this transformation. We believe that by combining cutting-edge technologies with technical expertise and exceptional commitment, we can build faster, better, and more efficiently than ever before.Our developers work with Cursor AI (cursor.com) — an IDE that revolutionizes the programming paradigm. We are capable of accomplishing in hours what takes other developers days, and we expect the same from you.Apply if you: Want to work in a product company with a fascinating, extensive, and complex business domain where your efforts today translate into tangible outcomes tomorrow. Enjoy tackling significant challenges and thrive in complex applications. Appreciate a dynamic environment where exciting developments are constant. Take initiative and strive to elevate team standards daily. Feel a profound sense of responsibility for your contributions and those of your team. Welcome constructive feedback about your work with an open mind. Are eager to understand the business and communicate effectively with others (not just within IT). Can quickly and efficiently create high-quality applications/features. Are confident in your technical knowledge and capable of enhancing application quality (including gradually improving legacy code). Proactively seek to improve processes around you. Your Responsibilities: Participate in crafting IT solutions from inception to completion (we do not operate in silos). Develop web applications (new features, bug fixing, refactoring). Engage in designing the architecture of new solutions and development infrastructure. Contribute to code reviews while ensuring the quality of created solutions. Continuously raise the standards of development processes. Collaborate closely with team members (Developers, PMs/POs, QAs). Maintain high programming quality and rapid task delivery (both individually and as a team). What We Expect: Excellent understanding of business and a broad context with a high level of detail. Outstanding ability to translate business goals into IT solutions that are as simple as necessary and not more complex than absolutely required. A strong desire and perseverance to continuously elevate team standards (both in terms of quality and efficiency).

At Base, our mission is to empower entrepreneurs to conquer the global e-commerce landscape. We provide a technology that revolutionizes how they sell online.Our international team, operating from Europe to both Americas, delivers an all-in-one system for thousands of sellers. We integrate them with industry leaders such as Amazon, eBay, Shopify, DHL, and FedEx. But we are not just another tech company; we are one of the fastest-growing platforms in the industry – growing 15 times in the last three years! We foster a culture where real impact and collaboration matter, and our team is the heart of our innovation.We are currently seeking a Senior Data Visualization Developer with expertise in React to contribute to our Base Analytics application project, which enables our clients to monitor sales, profitability, and key business metrics.Your role will be pivotal in building an efficient and scalable frontend application in React that processes large data sets and visualizes them through interactive charts, dashboards, and pivot tables. We are looking for someone who will collaborate with the Lead Frontend Developer, Data Engineers, and DevOps teams within an AWS environment.If you are an experienced React Developer eager to make a significant impact on product development, this role is for you!

Welcome to Our Team!At The Codest, we are a leading International Tech Software Company with technology hubs in Poland, providing cutting-edge solutions and IT projects worldwide.Our core values emphasize a "Clients and People First" approach, prioritizing our clients' needs and creating a collaborative environment for our employees. This commitment enables us to deliver truly exceptional products and services.Our journey is just beginning—we are eager to continue our growth. If you are searching for new opportunities, we invite you to join our team! Project Overview:You will work on one of Europe’s largest e-commerce platforms, utilized daily by millions of users. Our company connects sellers—from small businesses to global brands—with customers, offering a vast selection of products, swift deliveries, and a refined shopping experience. Our team develops scalable, high-traffic systems, relying on data and experimentation, fostering a culture of autonomy, accountability, and tangible influence on product development and the shopping experience in the region.You will join a team building a new platform for managing and launching multi-channel advertising campaigns, utilized by major market brands. On the frontend side, you will enhance a modern web application in React, responsible for managing campaigns, budgets, reporting, and integrations with advertising systems via a robust API. This project demands the creation of efficient, scalable user interfaces and working with large datasets in near real-time. We operate in an environment with high standards for quality, security, and deployment automation.We are seeking an experienced Senior React Developer who will advance the frontend of the application, ensure code quality, and collaborate with product and backend teams to deliver polished solutions. Your Responsibilities Include:Developing and maintaining the frontend application in React.Creating scalable components and ensuring UI consistency.Collaborating with backend teams on integrations through REST/GraphQL APIs.Optimizing application performance and enhancing UX for large datasets.Participating in technical discussions, proposing improvements, and best practices.

Join our team at Intellectsoft as a Senior Full Stack Developer! In this role, you will work with an innovative AI-powered platform designed to enhance business decision-making and efficiency. Our platform leverages cutting-edge analytics and machine learning to process extensive datasets, offering actionable insights and forecasts that are invaluable across diverse sectors such as healthcare. By seamlessly integrating with existing infrastructures, we empower teams to make swift, data-driven choices, fostering groundbreaking solutions.

Join margo-group as a Fullstack Developer specializing in .NET and Angular, focusing on cloud-native applications. In this role, you will collaborate with cross-functional teams to design, develop, and deploy robust applications that leverage the power of cloud technology. If you are passionate about innovative software solutions and enjoy working in a dynamic environment, we want to hear from you!

At Veeam, the global leader in data resilience, we empower businesses to manage their data seamlessly, anytime, and anywhere. Our comprehensive solutions encompass data backup, recovery, portability, security, and intelligence. Headquartered in Seattle, we proudly protect over 550,000 customers worldwide, ensuring their operations run smoothly. Join us as we innovate and make a meaningful impact for some of the largest brands globally. Step into the future of data resilience with us!About the RoleAs a JavaScript Developer (React), you will collaborate with our team to develop and maintain the frontend for Veeam's products, including Veeam Backup & Replication and Veeam ONE.What You’ll DoCreate and enhance UI components (dialogs, wizards, forms) using React.Expand functionality of existing components.Identify and resolve issues related to memory leaks and optimize performance.Engage with a micro-frontend architecture.Technologies You’ll Work WithTypeScript, React 19, RxJS.Vite.Styled-components, Veeam UiKit.Jest, Playwright.Auto-generated REST clients (OpenAPI/Swagger).

We are seeking a highly skilled Senior AI-Enabled Architect with over 7 years of experience to join our dynamic team at Altoros. In this pivotal role, you will analyze intricate project scopes, explore realistic optimization opportunities through AI-driven development practices utilizing a multi-agent approach, and actively contribute to technical implementation when necessary.This position encompasses two primary dimensions:Acting as a hands-on architect capable of deconstructing complex requirements, designing resilient backend architectures, and participating directly in the implementation process.Leveraging structured, practical experience in AI-first application development—creating effective workflows around LLM-based tools to enhance delivery efficiency safely.The core focus of this role is to drive project-level impact: assessing new opportunities (particularly those involving extensive integrations or high complexity), identifying secure optimization strategies, and, as required, leading or contributing to the execution of those solutions.This is a hands-on, execution-oriented technical position for someone who has effectively applied AI-first development practices in real-world production environments and possesses a solid business understanding of software development projects.

Are you a passionate Senior Software Engineer with a strong background in React? At Capco, we are seeking a talented individual to join our innovative team. You will be responsible for developing high-quality software solutions, collaborating with cross-functional teams, and driving continuous improvement in our software development processes.Your role will include designing and implementing user-friendly applications, ensuring optimal performance, and participating in code reviews to maintain best practices. This position offers an exciting opportunity to work in a dynamic environment where your contributions will directly impact our success.

Join the innovative team at nordsec as a Senior Frontend Engineer specializing in React within our Network Department. In this role, you will leverage your expertise to create dynamic and responsive user interfaces that enhance our network solutions. Collaborate with cross-functional teams to deliver high-quality software that meets our users' needs.

Join Nord Security and innovate the future of online safety.At Nord Security, we empower users and businesses to reclaim their online privacy and security. Our diverse range of solutions—from VPNs and password managers to threat intelligence and eSIMs—are designed to address complex security challenges, earning the trust of millions around the globe.As a Senior Software Engineer, you'll play a pivotal role in enhancing our User Control Panel, ensuring users have a seamless and secure experience.Key ResponsibilitiesDesign and enhance a sophisticated User Control Panel to foster user trust and engagement, driving sustainable growth.Implement new features and improve user flows within the account management portal, including subscriptions, billing, and security options.Maintain a high-quality, scalable front-end codebase using modern best practices.Continuously enhance code quality, performance, and user experience.Write and uphold unit and integration tests alongside feature development.Contribute to the component library and design system standards.Engage in code reviews to uphold engineering excellence.Collaborate with backend engineers to define API contracts and handle errors effectively.Work with QA engineers to guarantee feature reliability and document workflows.Debug and resolve issues throughout the frontend stack, including UI rendering and state management.Advocate for best engineering practices and contribute to improving development processes.Conduct research and development activities to support new initiatives and make informed technical decisions.Mentor team members and provide technical guidance on best practices.Shape the team's technical vision and contribute to long-term goals.Essential Qualifications4+ years of experience in JavaScript and TypeScript programming.2+ years of hands-on experience with React framework.In-depth understanding of web development principles, testing methodologies, and performance optimization techniques.Proficiency in modern front-end development practices and tools.Strong problem-solving skills and attention to detail.