Frontend Developer (ST) at altersolutions | Warsaw

Join Box as a Senior Frontend Software Engineer in Warsaw, Poland, and play a pivotal role in shaping the future of content management. As part of our dynamic team, you will craft and maintain engaging user interfaces that enhance the experience for over 115,000 organizations globally. Your expertise will help drive collaboration and streamline workflows through innovative, AI-powered solutions. You'll be responsible for documenting software specifications, participating in agile ceremonies, and fostering a collaborative work culture. This is an exciting opportunity to be at the forefront of a technological revolution in the content cloud space.

Join Box, Inc. as a Software Frontend Engineer III in our Growth Services team! We are looking for innovative and enthusiastic engineers to help us build exceptional user experiences that drive growth and engagement. As part of our dynamic team, you will be responsible for developing high-quality frontend applications using modern frameworks and tools.You will collaborate closely with cross-functional teams to translate business requirements into technical solutions, optimize application performance, and ensure a seamless user experience. If you are passionate about frontend technologies and eager to contribute to exciting projects, we want to hear from you!

Role overview Sigma Software Group seeks a Principal Full-Stack Engineer with deep frontend expertise for its Warsaw office. The position involves designing and building web applications that put user experience at the center. Collaboration is essential, as the role works closely with colleagues from different disciplines to ensure software solutions meet client expectations. What you will do Design and implement web applications with a strong emphasis on frontend quality and usability Collaborate with cross-functional teams to deliver reliable, high-quality software Lead technical projects and set direction for development efforts Mentor junior engineers and help shape team best practices Requirements Extensive experience in both frontend and backend development Demonstrated ability to lead projects and guide teams Proven track record of mentoring and supporting junior developers Strong commitment to building user-centric software This Warsaw-based role offers the opportunity to influence client projects and contribute to the growth of the team.

As a Software Validation Engineer III at Collabera, you will play a critical role in ensuring the quality and reliability of our software solutions. You will be responsible for developing and implementing validation strategies, conducting thorough testing, and collaborating with cross-functional teams to enhance product performance. Your expertise will contribute to continuous improvement initiatives and compliance with industry standards.

Fraud Warning: Beware of potential scams posing as legitimate job opportunities. To ensure your application is considered, please apply only through the official Sensor Tower website or directly through our authorized profiles on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account information during the application process. All official communications will originate from email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and no conversations will shift to external email or text platforms. If you encounter any issues, please reach out to us. Remember to attach your resume when applying.Recruitment Agencies: Sensor Tower does not accept unsolicited resumes from third-party agencies. Please refrain from sending resumes to our job alias, employees, or any other location. Sensor Tower will not cover fees related to unsolicited resumes and will not compensate agencies without a signed agreement.About This Role:Are you excited by the dynamic environment of a startup?Do you have a passion for developing high-impact, rapidly deployed products?Are you committed to mentoring emerging engineers and championing technical excellence?Join us in revolutionizing how insights are derived in digital marketing!Apply today!Role Summary:As a Mid / Senior Frontend Engineer at Sensor Tower, you will play a crucial role in developing top-notch products and features that enhance our user experience. Our flat organizational structure allows for your input to significantly influence product design and development.

About Box:Box (NYSE:BOX) stands at the forefront of Intelligent Content Management, creating an environment where organizations can enhance collaboration, oversee the entire content lifecycle, safeguard vital information, and revolutionize business workflows using enterprise AI. Established in 2005, Box simplifies operations for prominent global enterprises such as JLL, Morgan Stanley, and Nationwide. Our headquarters are located in Redwood City, California, with a presence across the United States, Europe, and Asia.By joining Box, you will play a pivotal role in propelling our platform into the future. Content is the heartbeat of business operations, encompassing countless files and information exchanged among teams and departments daily—ranging from contracts and invoices to employee records and product specifications. Our mission is to infuse intelligence into content management, enabling clients to reshape workflows throughout their organizations. With the fusion of AI and enterprise content, this is an unprecedented opportunity to redefine collaborative work, and at Box, you will be at the forefront of this transformation.As an AI-first company, we expect you to adopt a growth-oriented mindset and explore innovative ways to harness AI for quicker, more informed decision-making that amplifies your impact at Box.Why We Need You:Numerous leading enterprises depend on Box for secure content storage, and we are unlocking the potential of their data by developing essential capabilities such as Box Relay. We are enhancing Relay with new features and supporting products.Our Relay Experience team in Poland is dedicated to delighting users by automating routine tasks, thereby saving time and ensuring consistent results. As our team expands and embarks on new product development, we seek an experienced engineer capable of owning significant system components and working independently. In this capacity, your contributions will impact millions of users who utilize Relay to accomplish their daily tasks.Your Responsibilities:Draft detailed specifications and documentation for software projects.Plan and execute effectively...

Role overview Box, Inc. is looking for a Software Engineer III in Warsaw, Poland to focus on governance. This position involves building and maintaining frameworks that help Box’s software solutions meet compliance needs and support efficient operations. What you will do Develop and improve governance frameworks that strengthen product compliance and effectiveness. Collaborate with teams from various disciplines to design systems that move governance initiatives forward. Support alignment of software solutions with internal standards and regulatory requirements.

Join Fairmarkit as a Senior Frontend Engineer and be a key player in revolutionizing the procurement process. You will design and implement user-centric web applications that elevate the user experience. Collaborate with cross-functional teams to create scalable and maintainable solutions while ensuring high performance and responsiveness.

Join Box as a Senior Software Engineer specializing in File Systems and play a pivotal role in enhancing our innovative content management platform. At Box, we empower organizations to thrive in the AI-first era by optimizing collaboration and workflow management. As part of the Content Capabilities team, you'll contribute to our ambitious goal of supporting the Box Content Cloud's exponential growth by developing new platform features that enable intuitive user experiences. Collaborate with a talented team to tackle complex challenges in content management and make a significant impact on productivity for millions of users at leading enterprises.

Join Box, Inc. as a Software Engineer III and lead the development of innovative desktop experiences that elevate user engagement and satisfaction. In this role, you will be responsible for designing, implementing, and optimizing software solutions that seamlessly integrate into our desktop applications. You will collaborate with cross-functional teams to deliver high-quality software that meets the needs of our users.

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.

About FreshaFresha stands as the premier marketplace platform for beauty and wellness, embraced by millions of consumers and businesses around the globe. With over 130,000 businesses and 450,000 stylists leveraging our services, we have successfully processed more than one billion appointments to date.Headquartered in London, UK, Fresha operates 15 global offices spanning North America, EMEA, and APAC.Our platform empowers consumers to discover, book, and pay for beauty and wellness appointments with local providers. Simultaneously, businesses and professionals in the beauty and wellness sector utilize our all-in-one platform to streamline their operations through an intuitive software suite and innovative financial technology solutions.Fresha’s ecosystem equips merchants with everything necessary for seamless business operations, including appointment scheduling, point-of-sale systems, customer record management, marketing automation, loyalty programs, inventory management, and team oversight.Our consumer marketplace amplifies revenue opportunities for partner businesses by harnessing the power of online booking and automated marketing via mobile applications and advanced integrations with major technology platforms such as Instagram, Facebook, and Google.Role OverviewAt Fresha, we view AI as a catalyst for enhancing feature delivery rather than merely a coding assistant. We equip every engineer with state-of-the-art tools (Claude, GitHub Copilot, Cursor) to minimize technical toil, allowing you to concentrate on delivering impactful product features. We value engineers adept at utilizing these tools to generate momentum within our six-week cycles, expediting the transition from concept to code while ensuring robust technical judgment to verify, secure, and take ownership of the final user experience.In light of our ambitious growth trajectory, we are seeking an exceptional Senior Frontend Engineer to join our global team.You will report directly to the Team Lead and collaborate within a cross-functional product team, taking responsibility for designing and developing applications while coordinating with other team members working on different aspects of our projects.

About WPP Media WPP is the leading creative transformation company, leveraging the power of creativity to forge better futures for our employees, the planet, clients, and communities. Discover more at wpp.com. WPP Media is WPP’s global media collective, orchestrating the best platforms, talent, and partnerships to unlock endless opportunities for growth in an era where media pervades every aspect of life. Learn more at wppmedia.com. At WPP Media, we value our culture and our people, which empower us to deliver outstanding experiences for our clients and each other. In this role, you will embody WPP & WPP Media’s core values: Be Extraordinary by Leading Collectively to Inspire transformational Creativity. Create an Open environment by Balancing People and Client Experiences through Cultivating Trust. Lead Optimistically by Championing Growth and Development to Mobilize the Enterprise. Role Summary and Impact As a vital member of the Global Operations Centre (GOC), you will collaborate with teams across the U.S., Europe, and Asia to deliver impactful solutions in a vibrant, multicultural setting. We are looking for a talented and passionate Frontend Engineer to join our Data & Technology Solutions team. You will play a key role in designing intuitive, engaging, and high-performance user interfaces for our data products and AI platforms, including the innovative WPP Open platform. If you enjoy creating beautiful and functional web applications, excel in modern JavaScript frameworks, and are keen to turn complex data into user-friendly experiences within the dynamic AdTech landscape, we invite you to apply. You are: A skilled user experience craftsman with a sharp eye for detail and a dedication to constructing pixel-perfect, responsive, and accessible interfaces. Proficient in contemporary frontend technologies, capable of producing clean, modular, and maintainable code. Passionate about performance and consistently optimizing web applications for speed and efficiency.

Location: Warsaw, Poland - Hybrid (4 days on-site / 1 day remote)Contract: B2B · 25-40 k PLN net / month + RSUsWhy Fresha & Why Now?Fresha is revolutionizing the global beauty and wellness industry. With over 120,000 businesses, 450,000 professionals, and millions of clients, our platform manages more than 1 billion appointments, streamlining everything from scheduling to payments.Join us during this explosive growth phase—your contributions will be visible across the globe in a matter of days, not months.What You’ll DoAt Fresha, we view AI as a catalyst for accelerating feature delivery, not merely as a coding aid. We equip our engineers with cutting-edge tools (such as Claude, GitHub Copilot, and Cursor) to minimize mundane tasks. This allows you to concentrate on delivering impactful product features. We seek engineers who can effectively utilize these resources to enhance productivity within our 6-week cycles, expediting the transition from concept to code while ensuring technical integrity, security, and a superior user experience.* Take charge of our core booking & scheduling engine—the heartbeat of Fresha—ensuring it scales efficiently and provides seamless experiences for millions.* Design, construct, and launch new user-facing features using React + TypeScript, impacting a vast audience of professionals and clients.* Manage features from inception to completion: research, technical design, implementation, testing, deployment, and monitoring.* Utilize (and enhance) our Design System to rapidly deliver refined UI while elevating standards for consistency.* Develop robust automated tests (Cypress, Jest, React Testing Library) and maintain a healthy CI/CD pipeline.* Collaborate closely with Product, Design, Backend, Infrastructure, and Mobile engineers to bring features from ideation to launch and beyond.* Accelerate your efforts with AI: leverage AI agents, LLM-powered coding tools, and access a variety of AI resources (e.g., chatbots, development assistants).* Interested in backend, DevOps, or mobile? Grow your skills in those areas too!

Join NordLayer and be part of a cybersecurity revolution!We are creating a scalable cybersecurity platform tailored for modern teams, eliminating security concerns while enhancing productivity. With trust from over 11,000 global companies, NordLayer seamlessly integrates into any tech stack, offering robust protection across borders.Your Role: Play a crucial part in empowering businesses with cutting-edge network security solutions.Key ResponsibilitiesEnhance our codebase by crafting clean, high-quality TypeScript code, backed by rigorous testing.Provide mentorship and technical guidance to frontend developers through insightful code reviews and implementation strategies.Collaborate with backend engineers to define API contracts and ensure smooth integration between frontend and backend services.Work alongside product managers and designers to transform product requirements and UX designs into viable technical solutions.Uphold high engineering standards by promoting best practices in code quality, testing, and maintainability.Assist the team in delivering features within a Scrum framework by effectively breaking down tasks, identifying risks early, and contributing to accurate estimations.Essential Qualifications5+ years of experience in developing and maintaining modern frontend applications using React and TypeScript.Proven experience in designing frontend architectures and establishing scalable components and state management patterns.Strong knowledge of frontend performance optimization and web application best practices.Experience working with REST APIs and collaborating effectively with backend teams.Familiarity with frontend testing frameworks such as Jest, Testing Library, Cypress, or Playwright.Experience leading technical discussions within a distributed team environment.Bonus QualificationsHands-on experience in building or contributing to open-source projects.

About Us:Planner 5D serves as a global hub for innovative home design, bringing together over 90 million users across 230 territories, including two adventurous users connecting from Antarctica each month! Our platform revolutionizes the home renovation journey from initial concept to final execution, making it easier than ever with our state-of-the-art software. You don’t need to be a professional designer to elevate your living or work space. We are passionate about making the dream of customizable homes available to everyone.Our platform is accessible across multiple devices including Web, iOS, Android, Windows, and MacOS, ensuring seamless user synchronization. Planner 5D is not just software; it's a dynamic community of dedicated and product-focused professionals. Our diverse team collaborates across different time zones, driven by a common ambition to transform the home design industry.We are on the lookout for talented individuals who are eager to take initiative and drive innovation within our expanding suite of tools. Join us in shaping the future of home design.We are seeking a Frontend Developer who shares our enthusiasm for crafting clean, maintainable, and efficient code utilizing JavaScript and TypeScript. Your primary responsibilities will involve enhancing and refactoring existing code, creating tests, and ensuring the performance and stability of our product. Our development approach primarily utilizes Object-Oriented Programming (OOP), and we adhere to stringent coding standards and technical requirements.Our technology stack includes PHP 7.4(8.1), Symfony, PHPUnit, MySQL, Redis, MongoDB, RabbitMQ, Git, Docker.For frontend, we utilize native JavaScript, jQuery (legacy code), TypeScript, and Three.js.

Join our dynamic team as a Senior Frontend Developer at evolution in Warsaw! We are looking for a talented individual with a passion for building responsive and high-performance web applications. You will collaborate with cross-functional teams to deliver exceptional user experiences and implement innovative solutions.

Join our dynamic team at evolution as a Frontend Developer, where you will play a crucial role in designing and implementing innovative web applications. You will collaborate with cross-functional teams to deliver exceptional user experiences while utilizing the latest technologies. If you have a passion for frontend development and a desire to create impactful digital solutions, we want to hear from you!

Join Moss, where we empower finance professionals to automate their daily tasks and make innovative decisions.Our culture is what sets us apart — we prioritize impact and continuous growth, encouraging each team member to learn and excel. Moss has been recognized by Sifted’s Rising 100 and LinkedIn's Top Startups, and we are committed to driving your career forward while building a lasting success story together.We are currently seeking a Senior Frontend Engineer (f/m/d) to join one of our diverse tribes in Warsaw. The tribes currently hiring include:Financial ServicesGrowthSpend ManagementYou will work closely with product, design, and backend engineers to provide seamless and scalable solutions.