Senior Android Developer at Tonsser | Berlin

Join Tonsser, a company dedicated to empowering young football players for over a decade, as we embark on an exciting phase of growth. We are currently seeking a skilled Senior Android Developer to play a pivotal role in shaping our future innovations. If you have a passion for your craft, thrive in a fast-paced environment, and desire to make a significant …

Join Swarco as a Field Service Technician in Electronics, where you will play a crucial role in maintaining and servicing our innovative electronic solutions in the vibrant region of Southwest Brandenburg. Your expertise will contribute to improving transportation infrastructure and enhancing road safety.

KAYAK, part of Booking Holdings (NASDAQ: BKNG), runs a large-scale travel search platform used by travelers worldwide to find flights, hotels, rental cars, and vacation packages. The company also offers KAYAK for Business, which provides travel management solutions to organizations. Its network includes well-known brands like momondo, Cheapflights, and HotelsCombined. KAYAK aims to make exploring the world easier by building the best travel search engine and values innovation and real impact from its employees. Role overview As a Senior Java Software Engineer based in the Berlin office, you will play a key role in developing and refining the features behind KAYAK’s search and booking systems. The team collaborates with over 200 travel partners, giving users access to more than 500,000 hotels and 550 airlines. Your work will help ensure smooth, reliable experiences for millions of users each day. This position requires onsite presence in Berlin at least three days per week. What you will do Enhance search and booking algorithms to meet the needs of major corporate clients worldwide. Develop and maintain high-performance integrations with third-party APIs, including those for airlines, hotels, and rental car providers. Take ownership of your designs from concept through deployment, with a focus on code quality and system performance. Join code reviews and architectural discussions to keep the K4B project modular and reusable as KAYAK continues to grow. Requirements Bachelor’s degree in Computer Science or a related field. At least 4 years of professional experience working with Java. Strong knowledge of the Spring ecosystem (Spring/Spring Boot) and hands-on experience with both relational (SQL) and NoSQL databases such as PostgreSQL, MySQL, or Redis. Clear and effective communication skills in English. Ability to independently design and deliver engineering projects.

bitlane is actively seeking a talented Senior Frontend Developer specialized in React to join our vibrant team. The ideal candidate will possess substantial and hands-on experience in JavaScript, have a solid understanding of TypeScript or ES6, and demonstrate proficiency with the React/Redux ecosystem. We value individuals who are passionate about crafting lean and user-friendly interfaces, ensuring an exceptional user experience. If you resonate with this, we encourage you to apply!Key Responsibilities:Designing and developing responsive, modern user interfaces utilizing JavaScript, HTML, and CSS.Delivering high-quality applications by designing and implementing new features into production.Establishing development, testing, and production environments across various platforms, browsers, and devices.Collaborating closely with backend developers to guarantee a seamless user experience and a robust overall architecture.Defining project scope in conjunction with a project manager.Communicating your work progress effectively and adhering to deadlines set by yourself and the project manager.

At Enpal, we envision a future where every roof hosts a solar system, every home is equipped with a storage unit, and every garage houses an electric vehicle. Our mission is to make this vision a reality through an all-encompassing solution for decentralized energy, encompassing solar systems, battery storage, wall boxes, smart meters, and heat pumps. Central to our operations is our AI-driven platform, Enpal.One+, which seamlessly connects thousands of systems and optimizes electricity procurement and market feed-in.Are you prepared to develop solutions that transcend mere promises and bring genuine improvements in quality of life to countless households? What you create at Enpal will generate clean electricity for tomorrow and instigate a transformative shift in our energy consumption.Your RoleAs a Senior ERP Developer, you will be pivotal in enhancing Enpal's D365FO environment, the backbone of our operations managing thousands of energy installations across various markets. Your responsibilities will include designing and implementing customizations, integrations, and automations to streamline complex business processes into efficient system functionalities.Key Responsibilities:Contribute to the architecture of Enpal’s D365FO, including customizations and integrations.Work closely with functional consultants to transform business requirements into robust technical designs and configurations.Ensure D365FO is tailored to align with Enpal’s operational processes.Implement and maintain best practices in code quality, version control, CI/CD pipelines, and release management.Proactively seek opportunities for performance enhancements, scalability, and process improvements within the ERP ecosystem.Act as a technical mentor and subject-matter expert, guiding fellow team members and ensuring adherence to high ERP development standards.Your ProfileExtensive technical knowledge in D365FO, X++, and Microsoft Azure.Strong understanding of ERP architecture, including customization and integration practices (REST, OData, APIs, Electronic Reports, DMF).Experience in designing and optimizing data entities, extensions, and business logic.

About KAYAKKAYAK, a proud member of Booking Holdings (NASDAQ: BKNG), stands as a premier travel search engine. Handling billions of queries across our platforms, we empower travelers to discover their ideal flight, accommodation, rental car, and vacation package. We're revolutionizing business travel with our innovative corporate travel solution, KAYAK for Business.As part of KAYAK, you join a dynamic travel company that boasts a portfolio of global metasearch brands, including momondo, Cheapflights, and HotelsCombined. Innovation is at the heart of our operations, and every employee has the chance to leave a lasting impact. Our mission is to create the best travel search engine, simplifying the experience for everyone eager to explore the world.KAYAK is on the hunt for a Software Architect to take on a pivotal role as the primary technical authority within our backend engineering team. In this role, you will establish the technical vision and architectural governance necessary to uphold KAYAK’s status as the leading search and booking platform in the industry. Your responsibilities will include ensuring the integrity of a high-concurrency platform that integrates with over 200 global travel partners, 500,000 hotel properties, and 550 airlines.As a Software Architect, your influence will extend beyond single feature delivery. You will serve as a catalyst for innovation, identifying cross-cutting technical challenges, mentoring senior engineering talent, and ensuring that our enterprise-grade solutions for KAYAK for Business (K4B) remain resilient, scalable, and strategically aligned with our global expansion objectives.Location: Berlin, Germany (Hybrid: 3 days/week in-office)

Atolls is the world’s largest community-driven shopping platform, active in over 20 markets.We empower millions to make informed spending choices across discovery, evaluation, and (re-)purchase by connecting individuals with the ideal brands and retailers.Our team of 1,000+ members across 10 countries develops products utilized daily on a global scale, providing you with genuine ownership and the chance to witness your impact. Are you ready to help shape the destinations people trust for confident shopping? We invite you to learn more.About This Role:We are on the lookout for a Senior Java Backend Engineer to become an integral part of our expanding engineering team in Berlin. In this pivotal role, you will be responsible for designing, developing, and scaling high-performance backend systems utilizing contemporary Java technologies and cloud-native architectures. This position is perfect for individuals who thrive on tackling complex systems, prioritize code quality, and possess a robust architectural mindset.Our Benefits:At Atolls, we are committed to fostering both your professional and personal development. Here’s what you can look forward to:A culture that champions personal and professional growth, alongside opportunities for internal mobility.A supportive and open-minded team that welcomes diverse perspectives and innovative concepts.32 days of paid vacation plus an additional day off for your birthday, ensuring you have ample time to recharge.A flexible hybrid working model to help you find the right balance between work and life.Access to a learning budget and internal training to enhance your skills in your role.Mental health coaching to promote your well-being.Regular global and local gatherings to celebrate achievements and strengthen connections.The chance to take a sabbatical after three years with the company.A cloud-based company setup, allowing flexibility and collaboration regardless of your location.*These are global benefits applicable to all employees, with additional local perks based on your location.Responsibilities:As a Senior Java Backend Engineer, you will...

As an established IT service provider, we create modern, scalable software solutions for clients across various industries. We leverage the latest technologies, agile methodologies, and a passionate team dedicated to crafting digital products. We are looking to strengthen our team with experienced Senior Backend Developers / IT Consultants (m/f/d) who love technological diversity, enjoy holistic problem-solving, and provide competent consulting to our clients.You will develop end-to-end solutions that deliver real value to our clients while actively designing microservices and modern software architectures.You will build and operate high-performance backend services using Java or Kotlin, utilizing Spring Boot for complex software implementation, and reliably integrating databases and external interfaces.You are committed to high software quality, employing automated testing and clean code principles.You will confidently guide clients through architecture, technology, and implementation questions, translating technical concepts into understandable terms.You will collaborate closely with UX/UI designers, product owners, and developers from other disciplines, actively contributing to agile teams.You will conduct code reviews, provide constructive feedback, and ensure adherence to best practices, architectural guidelines, and high code quality within the team.

Hello and welcome! Are you ready to take on an exciting career challenge or just browsing your options? You’re in the right place!We are on the hunt for a skilled Senior Backend Developer to become part of our dynamic team. In this position, you will play a pivotal role in advancing our Hospitality product group, supporting our ambition to penetrate new markets and enhance our extensive commerce platform.This particular role focuses on developing a sophisticated, modular framework for users and permissions. You will engage in a broad spectrum of projects that significantly influence the daily experiences of countless customers worldwide, contributing to the vitality of local communities.Join us in reshaping the landscape of hospitality technology!Your Responsibilities:Collaborate with some of the brightest minds in the industry to enhance our omnichannel product by developing innovative features and workflows.Expand our product capabilities by contributing to our AWS-hosted, microservice-based platform.Balance the creation of new features with the maintenance of existing integrations, prioritizing feature development as we explore new markets.Report to the Development Team Lead, fostering strong collaboration with Product Managers, Product Designers, and Platform Teams.Engage in daily agile ceremonies, sparking innovation that challenges conventions and implements solution-driven ideas.Promote high standards of code quality and accountability, actively contributing to the health of our infrastructure.Encourage team growth by sharing knowledge and best practices while continually pursuing personal and professional development.Explore our Tech Stack here.Your Qualifications:Exceptional Java expertise with over 5 years of production experience.Proficient in the Spring framework.Strong grasp of object-oriented programming and design patterns.Experience with RESTful APIs, microservices architecture, and cloud technologies.

Your MissionJoin our dynamic Engineering team as a Senior Full Stack Developer, where you will not only craft code but also tackle intricate challenges and take ownership of features from inception to deployment. Your contributions will directly influence a product that empowers thousands of construction professionals to shape the world around us.In your initial months, you will:Create and implement innovative AI features, including our newly launched AI agent for editing Bill of Quantities (BoQs) and automated AI bidder recommendations.Work collaboratively with product managers and designers to refine the user experience and set the technical direction of our core offerings.Design and construct modular packages and services within our monorepo to enhance the structure and maintainability of our codebase.Our Engineering CultureAt cosuno, we cultivate a calm, collaborative, and productive engineering atmosphere. We empower our engineers with the autonomy to excel in their work. Our development philosophy includes:Agile & Fast-Paced: We practice trunk-based development and implement daily releases to deliver value quickly to our users.Quality by Default: A thorough Cypress end-to-end testing suite and strict adherence to typing, linting, and formatting standards ensure our codebase remains clean and maintainable.DevOps Mindset: Our efficient CI/CD pipeline deploys to AWS using Kubernetes, with infrastructure managed as code via Terraform.Collaboration & Transparency: We prioritize open dialogue, constructive code reviews, and a culture where the best idea prevails, regardless of its source.Your ProfileWe seek a passionate and experienced engineer eager to build exceptional products. You will thrive in this role if you possess:Extensive professional experience in developing, deploying, and maintaining complex web applications using TypeScript.In-depth knowledge of Node.js for backend development and strong proficiency in React for frontend tasks.A practical problem-solving mindset with a high sense of ownership, comfortable driving projects independently.Experience in collaborative, agile product teams.Excellent communication skills in English.Bonus Points For:Experience with cloud services, DevOps practices, or machine learning frameworks.

About KAYAKKAYAK, a member of Booking Holdings (NASDAQ: BKNG), stands as a premier travel search engine. With billions of queries on our platforms, we assist travelers in discovering their ideal flights, accommodations, rental cars, and vacation packages. We are also revolutionizing business travel with our innovative corporate travel solution, KAYAK for Business.As part of KAYAK, you will join a travel company that oversees a diverse array of global metasearch brands, including momondo, Cheapflights, and HotelsCombined. From our startup journey to becoming an industry trailblazer, innovation drives us, and every team member has the chance to leave a lasting impact. Our commitment is to develop the most efficient travel search engine, simplifying the process for everyone to explore the world.Position OverviewWe are in search of a proficient mid-level Java backend developer dedicated to implementing new features and maintaining KAYAK’s cutting-edge search and booking technology. Collaborating with over 200 travel partners and connecting to more than 500,000 hotels and 550 airlines, you will play a pivotal role in a dynamic team that ensures seamless operations, aiding millions in finding optimal accommodations and travel routes every day!This is a Fixed Term contract until September 30, 2027.This role requires working from our Berlin office a minimum of three days per week.Key ResponsibilitiesEnhance search and booking algorithms to meet the needs of our largest global corporate clients.Develop and sustain high-performance integrations with third-party APIs (airlines, hotels, and rental car providers).Take full ownership of your designs, from concept to deployment, while upholding exceptional standards for code quality and performance.Engage in code reviews and architectural direction to ensure the K4B project remains modular and reusable as KAYAK expands its enterprise reach.QualificationsBachelor’s degree or higher in Computer Science or a related field.5+ years of experience in Java programming.Hands-on experience with the Spring ecosystem (Spring/Spring Boot) and familiarity with relational (SQL) and NoSQL databases (e.g., PostgreSQL, MySQL, Redis).Excellent English communication skills.Ability to design and implement engineering initiatives with a focus on performance and usability.

Hello! We appreciate your interest in our team! Are you ready to embrace a new career challenge, or are you simply exploring opportunities? If so, you have come to the right place! We are on the lookout for a skilled Senior Backend Developer to join our dynamic team. In this pivotal role, you will contribute to the growth and advancement of our Hospitality product group, helping us to penetrate new markets and enhance our all-encompassing commerce platform. You will specifically be part of the team dedicated to developing a sophisticated, modular framework for user and permissions management. Your work on a range of projects will significantly affect the everyday experiences of thousands of customers globally and aid in revitalizing local communities. Join us as we shape the future of hospitality technology!

As a well-established IT service provider, we specialize in developing modern, scalable software solutions for clients across diverse industries. We embrace cutting-edge technologies, agile methodologies, and a passionate team dedicated to crafting exceptional digital products. To strengthen our team, we are looking for a seasoned Senior Fullstack Developer / IT Consultant (m/f/d) who thrives on technological diversity and enjoys thinking holistically about complex solutions—from backend to frontend—while providing expert consultation to our clients.You will develop end-to-end solutions that deliver real value to our clients, actively shaping microservices and modern software architectures.You will implement modern web UIs that are responsive, accessible, and user-centered, using frameworks like Angular, React, or Vue, supported by UI frameworks and libraries such as Tailwind CSS, MUI, or PrimeNG.You will utilize prototyping tools like Figma to comprehend designs from UX designers and translate them accurately into frontend code.You will develop and maintain high-performance backend services using Java or Kotlin, employing Spring Boot for robust microservices and reliably integrating databases and external interfaces.You will advocate for high software quality, including automated testing (e.g., Cypress, Playwright) and Clean Code principles.You will guide clients through architectural, technological, and implementation inquiries, communicating technical content in an understandable manner.You will collaborate closely with UX/UI designers, product owners, and developers from other disciplines, actively contributing to agile teams.You will conduct code reviews, provide constructive feedback, and ensure adherence to best practices, architectural guidelines, and high code quality within the team.

Join zenjob as a Senior Sales Development Representative and play a pivotal role in driving our sales initiatives. In this dynamic position, you will be responsible for generating leads, nurturing client relationships, and contributing to our sales strategy. You will work closely with the sales team to identify new business opportunities and help shape our approach in the market.

Hello and welcome! We appreciate your interest At Lightspeed, we are on the hunt for a talented Senior Java Developer to enhance our vibrant team. As a pivotal Backend Developer, you will play a crucial role in supporting the Hospitality product group as we strive to penetrate new markets and improve our sophisticated hospitality commerce platform.In this role, you'll join our dedicated Third Party Ecosystem Squad. This specialized team focuses on creating integrations that transform our flagship product into a comprehensive and indispensable solution, fostering partnerships that drive new business opportunities. By incorporating third-party services, your efforts will guarantee seamless interoperability, significantly enhancing the overall functionality and value of our platform. Your contributions will be vital in developing a robust and flexible ecosystem that caters to diverse customer needs.Most importantly, your work will revolutionize the global hospitality experience!

About Us Join our dynamic international team at Doctolib, based in Berlin, where we are devoted to enhancing the performance, features, and design of our essential healthcare product, the Scheduling System. Over the past decade, Doctolib has experienced remarkable growth by prioritizing pragmatic solutions and avoiding unnecessary optimizations. To sustain our momentum, we are focusing on performance as a key priority and are continuously evolving the architecture of our core features to accommodate future demands. We are currently re-engineering our Appointments Management Service from the ground up, utilizing modern event-driven, distributed technologies in line with our updated technology strategy. This pivotal service will revolutionize the way Care Teams manage appointments, ensuring patients receive quicker access to care.

scalablegmbh is seeking a Senior Android Engineer to join the team in Berlin. This position centers on designing and building Android applications that improve user experience and offer advanced functionality. What you will do Design and develop Android applications with a focus on usability and performance Work closely with colleagues from different disciplines to deliver cohesive mobile solutions Contribute to architectural choices and help shape the direction of mobile development Support the creation of scalable products that can grow with user needs Who we are looking for Experience building Android apps and a strong interest in mobile technology Comfort working on complex technical challenges Enjoys collaborating in a team setting and sharing ideas Motivated to have a meaningful impact on product quality and user satisfaction This role is based in Berlin and offers the chance to help shape the future of mobile solutions at scalablegmbh.

Join Our Innovative Team as a Senior Frontend EngineerAt peec, based in the vibrant city of Berlin, we are looking for a talented Senior Frontend Engineer to take charge of our frontend development. If you are passionate about crafting seamless user experiences and are eager to push the limits of modern web technologies, we want to hear from you!Your ResponsibilitiesLead the development of complex frontend features from conception through to execution, ensuring high-quality delivery.Utilize cutting-edge frontend technologies to create visually stunning and pixel-perfect user interfaces that adhere to design specifications.Work collaboratively with Product, Design, and Backend teams to bring concepts to life, ensuring an exceptional user experience.Maintain and promote best practices in code quality, accessibility, and performance through diligent code reviews and testing.Contribute to the evolution of our frontend architecture, component library, and design system to facilitate rapid development.

Join enpal as a Senior Flutter Engineer, where you will play a pivotal role in developing innovative mobile applications that enhance user experience. Collaborate with cross-functional teams to design, build, and maintain high-performance applications, ensuring seamless integration with backend services.

Join Elara Digital GmbH as we revolutionize the software landscape by replacing outdated tools in a market that has long been neglected by modern technology. Our product is actively utilized by customers on a daily basis, and we prioritize a quick feedback loop between user needs and our development efforts. We are seeking a talented Senior Fullstack Developer who can enhance our product, making it faster and easier to sell.In this role, you will work closely with our CTO in a compact team where your contributions will have a direct impact on the product. You will analyze our codebase and product from the perspective of someone who values clean architecture and maintainable code. You will proactively identify and resolve issues, not just in response to tickets, but out of a deep understanding of how the system should function. Collaborating with the CTO, you will translate often contradictory customer feedback into a coherent product roadmap, prioritizing effective solutions over quick fixes. Your leadership will inspire other developers, fostering a culture of high standards through thorough code reviews, pair programming, and meticulous ticket management. You will also possess a keen eye for modern and intuitive design, as we aim to replace cumbersome legacy tools with a user-friendly interface that feels contemporary, fast, and straightforward to navigate.You will know you are succeeding when our product becomes easier to sell, customer complaints decrease, and you consistently meet deadlines set by the CTO.We value decisiveness and independence; you should be prepared to make decisions without waiting for directives. When you need assistance, you will seek it out. Your passion for the product will drive you to understand customer needs deeply. Setbacks are part of the process, but we expect you to show up each day with renewed energy and to share your learnings with the team, as collaboration is at the heart of our engineering philosophy at Elara.