Senior Java Backend Engineer (m/f/x)

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, provi…

About RealistRealist is a pioneering WealthTech startup located in Germany, dedicated to revolutionizing the financial sector with state-of-the-art technology, insightful data analytics, and robust financial infrastructure. As we enhance our platform and technological capabilities, we are in search of a seasoned Senior Software Engineer to join our expanding team in Berlin and contribute to the creation of next-generation financial systems.About the RoleIn the capacity of Senior Software Engineer, you will be instrumental in designing and developing high-performance financial systems that efficiently handle vast quantities of data in a secure manner. You will collaborate closely with product, engineering, and data teams to architect scalable systems and aid in the development of intelligent, AI-driven financial applications.This position demands substantial experience in backend engineering, distributed systems, and data-intensive architectures, combined with a mindset conducive to a dynamic startup environment. We are particularly interested in candidates who are quick learners, capable of swiftly adapting to new technologies and evolving challenges.Key ResponsibilitiesDesign, develop, and maintain scalable backend systems that support data-intensive financial applications.Build and optimize high-performance OLTP systems for transaction-heavy workloads.Contribute to system architecture and design, ensuring reliability, scalability, and maintainability.

Join Synthflow AI, a revolutionary no-code platform designed for deploying voice AI agents that transform contact center operations and business process outsourcing (BPO) at scale. We empower mid-market and enterprise companies to efficiently manage routine calls, ultimately saving valuable time and resources for their teams.Our voice AI agents have made a significant impact:Saved over 5 million hours in contact center operationsIncreased call answering rates by 35% compared to non-AI operatorsHandled 45 million calls with an impressive 99.9% uptimeSupported by leading investors such as Accel, Atlantic Labs, and Singular, we are proud to serve over 1,000 customers and drive an industry shift towards advanced and accessible conversational AI.About the Role:We are seeking a Senior Python Engineer to develop robust, production-grade software and backend systems, focusing on databases, scalable APIs, and core engineering principles.Your Key Responsibilities:Design, develop, and maintain our backend infrastructure, ensuring scalability, performance, and reliability.Create and enhance data models and persistence layers with a strong emphasis on PostgreSQL best practices, including schema design, migrations, query optimization, indexing, and transactions.Develop and support enterprise-grade APIs using FastAPI, focusing on versioning, authentication/authorization, and observability.Participate in pair programming to foster code quality and team collaboration.Manage deployments and environments with Kubernetes and GitOps practices (ArgoCD).Conduct code reviews, offering constructive feedback and ensuring adherence to best practices.Contribute to end-to-end product delivery, including occasional front-end feature development when necessary.Qualifications:5+ years of experience as a Python developer, successfully delivering production systems.Proven expertise in building scalable and extensible data infrastructures.Strong familiarity with relational databases, particularly PostgreSQL (performance tuning, migrations, transactions).Experience in developing and maintaining enterprise-grade APIs using FastAPI.Solid understanding of engineering fundamentals and best practices.

Join Databricks as a Senior Staff Software Engineer! At Databricks, we are passionate about empowering data teams to tackle some of the world's most challenging problems, ranging from security threat detection to groundbreaking cancer drug development. Our mission is to build and operate the finest data and AI infrastructure platform, allowing our customers to concentrate on the high-value challenges central to their missions. Our engineering teams develop sophisticated products that address significant needs globally. We are responsible for one of the largest-scale software platforms, consisting of millions of virtual machines that generate terabytes of logs and process exabytes of data daily. Given our scale, we frequently encounter cloud hardware, network, and operating system issues, and our software is designed to shield our customers from these challenges seamlessly. The Delta DML team is responsible for the core write-path operations of Delta Lake, the open-source storage layer powering the Databricks Lakehouse. Our goal is to deliver top-tier performance and a smooth user experience at massive scales, with the majority of data processed in Databricks traversing our platform. We spearhead performance innovations such as Low Shuffle Merge and Deletion Vectors, and actively contribute to open-source initiatives to unify Delta and Iceberg formats. We are looking for a highly capable and experienced Senior Staff Software Engineer to join our backend team. In this pivotal role, you will be key in designing, developing, and maintaining robust backend systems that power Databricks workspaces. You will create the next-generation platform for serving workspace assets, ensuring high queries per second (QPS), low latency, reliability, and performance, while proactively addressing future growth challenges. Additionally, as a senior team member, you will provide technical leadership, mentorship, and guidance to junior engineers, enhancing overall team coding practices and system designs. Your Impact: Address real business needs at scale through your software engineering expertise. Conduct low-level systems debugging, performance measurement, and optimization on extensive production clusters. Architect design solutions, influence product roadmaps, and take ownership of new projects. Implement tools to enhance automation and operability of services. Utilize your extensive experience to help prevent and investigate production issues. Plan and lead complex technical projects that involve collaboration with multiple teams across the company. Act as a technical team lead by mentoring others, leading sprint planning, delegating tasks, and participating in project planning.

About GetYourGuideGetYourGuide is the world's leading platform for unforgettable travel experiences, allowing travelers to uncover the best activities in their destinations. Since our inception in 2009, we have facilitated over 150 million bookings for tours, activities, and attraction tickets globally. With a dedicated team of over 800 travel experts and tech enthusiasts, we operate from our headquarters in Berlin, complemented by 17 local offices worldwide.Our Mission:At GetYourGuide, technology is the driving force behind our growth. Our Marketplace initiatives are redefining global travel experiences, and we invite you to join us in this mission. The features we develop allow customers to effortlessly book memorable experiences while empowering our partners to grow their businesses. This complex challenge presents a unique opportunity for you to create impactful solutions that scale across the globe.From crafting dynamic search and recommendation algorithms to designing new features that propel our growth, your contributions will have a tangible impact. We pride ourselves on pushing boundaries and discovering innovative ways to bring the magic of travel to people around the world.Our teams operate within cross-functional mission groups consisting of backend and full-stack engineers, mobile developers, data engineers, product managers, and designers.

About UsAt Perk, formerly known as TravelPerk, we are revolutionizing the way businesses handle travel and spend management. Our intelligent platform is designed to eliminate tedious manual tasks that hinder productivity, automating everything from travel bookings to expense management and invoice processing. By addressing the significant issue of shadow work, we aim to restore lost hours, enhance workplace morale, and ignite innovation.With over 10,000 companies, including industry leaders like Wise, On Running, Breitling, and Fabletics, relying on us, we are tackling the staggering $1.7 trillion problem of lost productivity in the workplace. Founded in 2015, Perk has expanded to a vibrant team of over 1,800 professionals across 12 global offices, with our headquarters situated in London and Boston. Our mission is to integrate innovation, control, and simplicity, transforming the work experience for businesses and their employees.Our core values emphasize ownership, delivering exceptional experiences, and working collaboratively as one unified team. We believe in fostering curiosity and a meaningful mindset to unlock your full potential. Our talent team comprises top minds from both the travel and SaaS sectors, representing more than 70 countries. If you are passionate about making a tangible impact and shaping how millions experience work, we invite you to join our team.To explore more about us, visit www.perk.com.

We are on the lookout for an innovative and dynamic Engagement Manager to join our team at dreessommerse. In this pivotal role, you will spearhead strategic initiatives within our ecosystem and drive co-creation efforts with our partners. Your expertise will be essential in fostering collaborative relationships and ensuring the successful execution of projects that align with our vision.

At Enpal, we envision a future where every rooftop boasts a solar system, every home is equipped with a storage unit, and every garage houses an electric vehicle. We facilitate this vision through our comprehensive solution for decentralized energy, which encompasses solar systems, battery storage, wall boxes, smart meters, and heat pumps. Central to our operations is our cutting-edge AI-powered platform, Enpal.One+, which seamlessly integrates and optimizes thousands of systems to enhance electricity procurement and trading in the energy market.Are you prepared to contribute to tangible solutions that significantly enhance the quality of life for countless households each day? Your innovations at Enpal will not only provide clean energy for the future but will also drive a lasting transformation in our energy consumption practices.Your RoleAs a Senior Software Engineer (f/m/d), you will tackle complex challenges in delivering renewable energy solutions. This includes transforming the planning and installation processes of solar panels through engaging frontend applications, developing APIs that support real-time energy data, and scaling our cloud infrastructure on Azure.We pride ourselves on our agility and rapid career advancement opportunities. Our mission to democratize sustainable solar energy can only be realized through a customer-focused and product-oriented approach, coupled with collaboration between software development, product management, and our lean, experiment-driven business development strategy.Join us in honing your professional skills, participating in the energy revolution, and collectively owning the sustainable changes we aspire to bring to the world! We eagerly await your application.At Enpal, your responsibilities will include:Developing Software. We are committed to delivering incremental value with every iteration, celebrating improvements that enhance user experiences and contribute to our climate goals.Enhancing Developer Satisfaction. No one should have to stay up late deploying new solutions or manually run regression tests repeatedly. We focus on enhancing stability and automating processes such as load testing and vulnerability scans.Continuous Growth and Learning. Whether you're a Kafka expert or just getting started with Azure Bicep, we are eager to learn from your expertise and ensure you continue to develop through our knowledge-sharing initiatives.Architectural and Visionary Work. Contribute to the architecture and strategic vision of our software solutions.

Join our dynamic and innovative team at bitlane as a Senior Backend Developer. We are seeking a passionate software engineer to contribute to our product development journey from conception to deployment and beyond. In this role, you will collaborate closely with project managers and frontend developers to ensure that we meet and exceed our project requirements. The ideal candidate will possess a deep understanding of software engineering principles and industry best practices, delivering clean, maintainable, and error-free code with robust test coverage. You will be responsible for writing automated tests, conducting code reviews, and taking end-to-end ownership of your projects. We value problem solvers with an inquisitive and innovative mindset, ready to leverage their software development skills to create new services. Your role will involve backend development across a variety of projects, ranging from small applications and single-page websites to comprehensive e-commerce systems and complex CRM solutions. If this resonates with your skill set, we look forward to receiving your application!Responsibilities:Collaborate with our software team to design and launch new featuresEnhance our product and codebase with your analytical insightsMaintain our systems at the cutting edge while developing our growing environmentExpand our existing web technology portfolioCreate new microservices using AWS and improve existing onesDevelop and maintain tools for software and data interactionDefine project scope in collaboration with project managersCommunicate your work status and meet deadlines established with project managers

Join our innovative team as a Senior Software Engineer specializing in Solr. In this fully remote position, you will have the opportunity to leverage your expertise in search technologies to design, implement, and optimize high-performance applications. Collaborate with cross-functional teams to drive the development of robust solutions that meet our clients' needs.

At Enpal, our vision is to empower every household with sustainable energy solutions. We strive to have a solar system on every roof, a storage unit in every home, and an electric vehicle in every garage. Our comprehensive approach to decentralized energy encompasses solar systems, battery storage, wall boxes, smart meters, and heat pumps. Central to this mission is our innovative AI-powered platform, Enpal.One+, which seamlessly connects thousands of systems while optimizing electricity procurement and feed-in on the energy market.Are you ready to create solutions that do more than just promise change? Join us at Enpal, where your contributions will deliver clean, renewable electricity and significantly enhance the quality of life for countless households.Your RoleAs a Senior Software Engineer - C# (f/m/x), you will tackle intricate challenges in delivering effective renewable energy solutions. Your responsibilities will range from digitalizing the planning processes for solar panel installations through engaging frontend applications to developing APIs that support real-time energy data management and scaling cloud infrastructure in Azure.We promote an agile environment that fosters rapid personal and professional growth. Our commitment to making sustainable solar energy accessible to all can only be achieved by uniting our customer-centric approach with collaborative efforts between software development, product management, and innovative, experiment-driven business development.Join us to enhance your skills, participate in the energy revolution, and work together towards the sustainable change we aspire to see in the world!Software Development: We prioritize delivering incremental value with each iteration and celebrate improvements that enhance user experiences and contribute to our climate goals.Developer Satisfaction: We aim to enhance stability and automate processes, minimizing the need for late-night deployments and repetitive manual regression tests.Continuous Learning: Whether you're an expert in Kafka or just starting with Azure Bicep, we welcome your knowledge and are committed to supporting your growth through continuous learning opportunities.Architectural Design: You will have the opportunity to work on architecture and technical design, ensuring our solutions are robust and scalable.

At Enpal, we're on a mission to revolutionize how energy is consumed. Our vision is to provide solar systems on every rooftop, battery storage in every home, and electric vehicles in every garage. Our comprehensive solutions encompass everything from solar installations to smart meters and heat pumps, all powered by our advanced AI platform, Enpal.One+. This innovative platform seamlessly connects a multitude of systems, optimizing energy procurement and feed-in across the market.Are you passionate about creating impactful solutions that enhance the quality of life for thousands of households? Your contributions at Enpal will not only help deliver clean energy but also foster a significant shift in energy usage for the future.Your RoleAs a Senior Software Engineer - Node.js (f/m/x), you will tackle intricate challenges in the realm of renewable energy solutions. Your responsibilities will range from digitizing solar panel installation planning with engaging frontend applications to developing APIs that provide real-time energy data. Additionally, you will be instrumental in scaling and managing our cloud infrastructure on Azure.We pride ourselves on our agility and commitment to professional development. Our vision of making sustainable solar energy accessible to everyone thrives on a customer-centric approach, fostering collaboration between software development, product management, and innovative business strategies.Join us in enhancing your professional journey, participating in the energy transformation, and taking shared responsibility for the sustainable future we aspire to create! We eagerly await your application.At Enpal, you will:Build Software: We prioritize delivering incremental value in every iteration, celebrating improvements that enhance user experience and help achieve our climate objectives.Enhance Developer Happiness: We aim to automate processes, reducing manual testing and deployment times, thereby improving the overall stability of our solutions.Grow & Learn: Whether you're an expert in Kafka or new to Azure Bicep, we are committed to facilitating your growth through shared knowledge and resources.Engage in Architecture & Design: Collaborate with cross-functional teams to design scalable and robust software architectures.

Why Join Scout24?Scout24 is the proud home of ImmoScout24, Germany's leading real estate platform. For over 25 years, we have been transforming the real estate landscape in Germany and Austria. Our mission is to create a digital ecosystem that connects homeowners, seekers, and real estate agents, making the process of finding the perfect home seamless and efficient. Your career is as significant as finding the right property! At #WorkingatScout24, you will join a vibrant, inclusive team of around 1,100 colleagues from 58 different nationalities. We celebrate diversity and individuality, fostering a culture of openness and authenticity that promotes personal growth. We view mistakes as opportunities for innovation and improvement, and together we strive for success while treating one another with respect as #oneteam.If this resonates with you, we would be thrilled to welcome you aboard! Even if you believe you don't meet all the job requirements, we are eager to learn how you can contribute to our team. Join us in our journey of growth! Welcome home!In addition to our exceptional team and culture, we offer fantastic benefits that make Scout24 an outstanding workplace!

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 our team at dev2 as a Senior/Lead Software Engineer focusing on Developer Experience, where you'll play a pivotal role in enhancing our development environment and tools. Collaborate with cross-functional teams to design, build, and improve solutions that empower developers to perform at their best. Your expertise will drive innovation and ensure a seamless developer journey.

Join our dynamic team at Contentful as a Senior Software Engineer specializing in Backend & Infrastructure. In this pivotal role, you will design and implement robust backend systems that power our content platform. Collaborate with cross-functional teams to enhance our infrastructure, driving innovation and efficiency in our development processes.

Become a part of Voyfai, an innovative Series A startup revolutionizing logistics and technology throughout Europe.Based in the vibrant city of Berlin, we are at the forefront of a network of companies operating across various European markets.This is an exceptional chance to take the reins from the very beginning, make a significant impact, and thrive in a fast-paced, dynamic setting. Whether you're refining processes, crafting strategies, or spearheading initiatives, your efforts will directly affect the success of Voyfai and the enterprises we assist. If you have a passion for building innovative solutions from the ground up and want to be part of a rapidly growing company, we are eager to hear from you.Your RoleWe are on the lookout for a talented Senior Software Engineer (m/f/d) to join us in constructing the essential infrastructure of our logistics platform. In this pivotal role, you will collaborate closely with AI engineers and product stakeholders to define system architecture, integrate with transport management systems, and develop customer-facing features that utilize large language models. Your contributions will play a vital role in shaping our engineering practices and establishing a scalable foundation for future product development over the next year.Key Responsibilities:Design and implement scalable software solutions with a focus on robust system architecture and clean coding practices.Create and enhance integrations with transport management systems and third-party logistics platforms.Partner with AI engineers to deliver customer-centric features powered by advanced language models.Enhance system reliability, maintainability, and scalability by managing technical debt and evolving the technology stack.Utilize PostgreSQL to ensure data consistency, integrity, and performance.Employ cloud platforms such as AWS or GCP to facilitate infrastructure and deployment.Contribute to DevOps and CI/CD practices to enhance release speed and operational stability.Occasionally engage with customers to translate their requirements into product and engineering solutions.What You Bring:A minimum of 5 years of professional software engineering experience, demonstrating strong backend architecture skills and proficiency across the full stack.Proficient in JavaScript or TypeScript in both backend and frontend contexts.Experience with SQL databases, particularly PostgreSQL.Familiarity with cloud platforms such as AWS or GCP.Strong understanding of DevOps and CI/CD methodologies.Excellent problem-solving skills and a proactive approach to challenges.

Join Doctolib as a Senior Software Engineer specializing in JVM, Ruby, and React. In this pivotal role, you will design, develop, and optimize our software solutions to enhance healthcare accessibility across Europe. Collaborate with a talented team of engineers and play a key role in driving innovation in our technology stack.

At Enpal, we envision a world where every roof hosts a solar system, every home is equipped with a storage unit, and every garage houses an electric vehicle. Our innovative approach provides a comprehensive solution for decentralized energy, integrating solar systems, battery storage, wall boxes, smart meters, and heat pumps. Central to our mission is our advanced AI-driven platform, Enpal.One+, which seamlessly connects thousands of systems while optimizing electricity procurement and feed-in on the energy market.Are you prepared to contribute to real solutions that enhance the quality of life for countless households? The work you do at Enpal will not only provide clean energy for the future but also drive meaningful change in our energy consumption habits.In the Customer Domain, we take charge of the digital customer experience through our mobile app and web portal, empowering users to manage and monitor their energy systems effectively. Our teams focus on developing customer-centric features that genuinely address user needs while adhering to our high-quality standards. Customer feedback is the cornerstone of our development process.As a Senior Software Engineer (f/m/d), you will tackle intricate backend and platform challenges that underpin our customer-facing products.We pride ourselves on our rapid pace, agility, and the potential for significant career advancement. Our ambition to make sustainable solar energy accessible to everyone thrives on our focus on customer experience, collaboration between software development, product management, and our agile, experiment-driven business model.Join us in honing your skills and participating in the energy revolution as we collectively strive for sustainable change in the world!

At JetBrains, we are passionate about coding. Since our inception in 2000, we have been dedicated to creating the most robust and efficient developer tools in the industry. Our products automate routine tasks, enhancing productivity and allowing developers the freedom to innovate and excel. We are seeking a talented Software Developer to join our core team focused on the development of Ktor, an asynchronous framework designed for building connected applications. Ktor offers a comprehensive HTTP server and client stack alongside various low-level subsystems (I/O, networking, protocols, etc.) and an extensive array of customizable features. Our team is committed to enhancing existing functionalities while also pioneering new capabilities within the framework.