Senior Java Backend Engineer at Atolls | Munich

Join vCluster Labs as a Senior Backend Software Engineer, where your coding expertise will play a pivotal role in shaping the future of Kubernetes multi-tenancy. In this influential position, you will be a key architect of the vCluster Platform, navigating intricate Kubernetes internals to develop tools utilized by top engineering teams globally.Your responsibilities will include:Diving Deep into Kubernetes: Collaborate closely with Kubernetes internals, pushing the limits of container orchestration.Expert Go Development: Craft high-performance, resilient Go code that powers the core functionalities of the vCluster platform.Taking Ownership: Exhibit complete ownership of your projects; self-motivated and capable of guiding feature development from technical design to production without constant supervision.Open Source Contribution: Collaborate with the community and contribute to open-source initiatives, shaping the next generation of tenancy models with scalable solutions for resource sharing and isolation beyond basic namespaces.Solving Technical Challenges: Address complex engineering problems that require a profound understanding of systems architecture.This position may be ideal for you if you possess:Kubernetes Expertise: Extensive knowledge of Kubernetes internals, including architectural patterns, networking, and storage.Proficiency in Go: Strong programming capabilities in Go, translating Kubernetes insights into clean, efficient code.A Builder Mentality: Passion for building outside work, demonstrated through active GitHub projects or open-source contributions.High Agency: A self-driven individual thriving in environments where you can independently identify and solve problems.Startup Experience: A background in high-growth environments, comfortable with ambiguity and eager to make an impact.Bonus qualifications include:...

Full-time | Munich | Seed Stage | Equity + SalaryJoin Us in Building a Transformative CompanyAt Knowlix, we are dedicated to amplifying the productivity of small businesses tenfold. Our goal is to establish ourselves as the premier platform for human-AI and AI-to-AI collaboration.Although we are in the early stages, we have grand ambitions. This is a unique chance for you to influence a product that will reach millions and set industry standards.We prioritize speed, frequent iterations, and exceptional quality. If you are passionate about building, deploying, and scaling innovative solutions, particularly leveraging AI for significant improvements, this is the opportunity for you.Why Choose Knowlix Now?We are a well-funded seed-stage startup, supported by top-tier investors and seasoned founders.Our technology is functional and our initial users are experiencing its transformative effects.We are targeting a vast market with a product that revolutionizes work dynamics.As one of our early team members, you will have significant influence and ownership over the company’s direction.We believe that rapid progress is achieved through focused efforts and continuous iteration.This isn't just a job; it's a chance to contribute to a once-in-a-generation company if we execute our vision effectively.The RoleWe are seeking a pragmatic and enthusiastic Backend Engineer with robust skills in Python and a strong understanding of SQL and cloud infrastructure. You will collaborate closely with AI researchers, product designers, and DevOps engineers to create a seamless interface between human users and our AI systems. Familiarity with Go, Rust, and Swift is advantageous, especially for future components such as microservices or mobile interfaces.

As a Senior Backend / Platform Engineer at causaprima, you will take charge of the foundational platform that empowers our agents. This includes overseeing an event-driven architecture, managing data pipelines, integrating with customer accounting systems, and ensuring the infrastructure is reliable, auditable, and swift.Key ResponsibilitiesEvent Store Management — Lead the development of an append-only PostgreSQL event store featuring tamper-evident hash chaining, real-time event distribution, agent replay capabilities, and schema versioning.Cryptographic Signature Infrastructure — Implement key management and signature verification for all agent events, including establishing approval chains for external actions.Workflow Constraint Engine — Develop a robust gateway that verifies authorization before any external action (email, payment, API call) is executed.PII Vault & GDPR Compliance — Ensure the safe storage of personal data through isolated, encrypted solutions, allowing for the right to erasure and data residency per region.Multi-Tenancy Architecture — Design systems that incorporate row-level security and tenant isolation across all data stores, including tenant-scoped LLM API keys.Authorization (Cerbos) — Implement attribute-based access control for agents and humans with deterministic policy evaluations, ensuring LLMs are not responsible for authorization decisions.MCP Security Layer — Establish authentication protocols, capability-based scoping per partner, and rate limiting for the Model Context Protocol endpoint.Database Architecture — Drive PostgreSQL schema design, create effective indexing strategies, and enhance performance tuning and read replica topology.

WHO WE AREAt Proxima Fusion, we are on a transformative mission to revolutionize sustainable energy. Leveraging the innovative W7-X stellarator and the latest technological advancements, we are paving the way for commercially viable fusion power solutions.Our work in stellarator optimization, driven by state-of-the-art computation and machine learning, is pushing the boundaries of fusion technology. We are unlocking new high-performance design opportunities through high-temperature superconducting magnets.To seize this monumental opportunity, we are assembling a team of exceptionally dedicated and passionate individuals who will unite to drive groundbreaking advancements in technology.WHY JOIN PROXIMA FUSIONEngage in some of the most intricate technological challenges aimed at delivering abundant, safe, and clean energy to the world.Collaborate and learn alongside a remarkable group of accomplished and motivated professionals.Make your most impactful contributions and enjoy the journey of innovation.Demonstrate that great achievements are possible in Europe when the best talent comes together.YOUR IMPACTAt Proxima Fusion, our simulation-first strategy will be anchored by robust software infrastructure and tools. The challenge lies in developing software that facilitates the exploration of the expansive hyper-dimensional space of stellarator designs to maximize feasibility while minimizing costs.The Dev Platform team is constructing the backbone of our highly integrated, simulation-driven approach to stellarator design. Our foundational data, computing, and analysis infrastructure supports research and development across the organization. In this role, you will work closely with fusion experts, engineers, and AI researchers to create infrastructure and influence our software development processes. If you possess strong software skills, a commitment to product quality, and a proactive attitude, this is a unique chance to contribute to a future powered by fusion.WHAT YOU WILL DODesign and develop a platform that empowers simulation, optimization, and stellarator design teams to tackle their challenges and achieve their objectives more efficiently.Lead the Cloud Infrastructure Operations.Oversee general cloud infrastructure management.

Atolls is the world's largest community-driven shopping platform, operating in over 20 markets.We empower millions to make informed spending decisions through discovery, evaluation, and (re-)purchase by connecting them with the right brands and retailers.With a team of over 1,000 professionals spanning 10 countries, we create products that are utilized daily on a global scale. Here, you'll enjoy genuine ownership of your work and witness the tangible impact of your contributions. Want to influence the shopping experiences that people trust? Read on.About This Role:We are seeking a Senior Backend Engineer (TypeScript, NestJS/Node.js) to join our Fulfilment team in Munich or to work remotely within Germany. Your role will be crucial in enabling our customers to earn and redeem cashback on our rewards platforms, thereby creating outstanding user experiences and empowering consumers to make informed shopping decisions. As an integral part of our team, you will directly contribute to building and enhancing the digital platforms our users depend on throughout their shopping journeys.Your contributions will influence how millions of consumers engage with our platforms, guiding them to make intelligent, equitable, and rewarding choices.Our Benefits:At Atolls, we are committed to fostering both your professional and personal development. Here’s what we offer: • A culture that promotes personal and professional growth, with opportunities for internal mobility. • A supportive and open-minded team that values diverse perspectives and innovative ideas. • 32 days of paid vacation plus your birthday off, ensuring you have ample time to recharge. • A flexible hybrid working model to help you balance work and life. • Access to a learning budget and internal training to facilitate your growth in your role. • Mental health coaching to support your well-being.

ABOUT USAt Avelios, our vision is to revolutionize healthcare through our advanced software platform, designed for the data-driven digitization of hospitals and patient care. Our modular platform enhances hospital workflows using innovative technology, ensuring that healthcare professionals can provide exceptional patient care. As we expand rapidly, we recognize that diverse backgrounds strengthen our team and mission.THE TEAM AND ROLEAs a Working Student in Backend Engineering (All Genders), you will join a dynamic development team and gain practical experience in creating large-scale, mission-critical software. Collaborating with seasoned engineers, you will contribute to the foundational digital infrastructure that empowers real-world clinical care, while learning to produce secure, scalable, and high-quality code that makes a tangible difference.YOUR RESPONSIBILITIESCollaborate with our core development team on impactful product features.Design, test, deploy, and maintain backend or frontend components of Avelios services.Acquire knowledge on building and maintaining large-scale clinical software infrastructure.Utilize modern technologies in a high-stakes healthcare environment.Learn and implement best practices in secure and efficient software engineering.Contribute innovative ideas to enhance performance, usability, and user experience.YOUR QUALIFICATIONSCurrently enrolled in Informatics, Computer Science, Business Informatics, or a related field.Proficiency in at least one of the following programming languages: Java, C++, or Rust.Demonstrated coding experience through projects or GitHub contributions is advantageous.A genuine enthusiasm for learning and exploring new technologies.A solution-oriented mindset with a strong emphasis on execution.Fluency in German and/or English.YOUR BENEFITSGain valuable hands-on experience in a cutting-edge healthcare technology environment.Work alongside experienced professionals and learn best practices in the industry.Flexible working hours to accommodate your studies.

ABOUT USAt Avelios Medical, we are committed to developing a premier software platform dedicated to the data-driven digital transformation of hospitals and patient care. Our innovative modular software platform is designed to digitize and enhance workflows in healthcare settings using the latest technology, all while ensuring user-friendliness. Our mission is to empower hospitals, doctors, and nurses to deliver the highest quality patient care. As we rapidly expand, we invite diverse talent to join our team and contribute to the advancement of healthcare.THE TEAM AND ROLEIn your role as a (Senior) Backend Engineer (All Genders), you will be instrumental in building a robust and secure infrastructure that supports our platform within clinical environments. You will collaborate with our core development team to design scalable services, optimize performance, and implement industry best practices in backend engineering, all aimed at making a significant impact in healthcare.YOUR RESPONSIBILITIESWork closely with our core development team to create secure and reliable backend services.Design, test, deploy, and maintain crucial Avelios services and infrastructure.Develop scalable and high-performance software tailored for the healthcare context.Promote and implement best practices in fast and secure software engineering.Utilize modern technologies to address complex challenges in clinical digitization.Contribute innovative ideas to enhance system architecture, usability, and performance.YOUR QUALIFICATIONSDegree in Computer Science, Informatics, Business Informatics, or related practical experience.Proficiency in at least one of the following programming languages: Java, C++, or Rust.Demonstrated coding experience, with GitHub contributions or personal projects being advantageous.A strong desire to learn and work with new technologies and tools.Excellent problem-solving skills and a proactive, solution-oriented approach.Fluency in English is required.YOUR BENEFITSDiverse and engaging tasks with opportunities for ownership.An international and informal team structure that fosters motivation and collaboration.

About Apaleo Apaleo builds an open, API-first property management platform for the hospitality industry. The company’s modular infrastructure helps hotels customize their technology, automate routine work, and deliver tailored guest experiences. Apaleo’s platform includes advanced applications and AI agents that adapt to each guest’s needs. Role Overview The Senior Backend Engineer (.NET) will shape the foundation of Apaleo’s public API layer. This position focuses on creating the Storefront API, a scalable interface that lets external systems, such as ChatGPT and booking platforms, connect directly with Apaleo. The work combines backend engineering with AI, starting from a clean API design and moving toward systems that support intelligent, agent-driven guest interactions. What You Will Do Design and implement the Storefront API for Apaleo’s property management platform Develop scalable, reliable backend solutions in .NET Enable integrations with external partners and booking platforms Build systems that support agentic booking and AI-powered guest experiences Work with a high degree of autonomy on architecture and deployment decisions Location This role is based in Munich.

airapps seeks a Backend Quality Assurance Engineer based in Munich. This position centers on upholding and enhancing the quality of backend systems, collaborating closely with development teams to help deliver dependable software releases. Key responsibilities Develop and execute thorough test plans for backend services Partner with developers to identify and document software defects Contribute to continuous improvement of software quality Role overview This role requires careful attention to detail and a commitment to supporting reliable backend operations. The Backend Quality Assurance Engineer will play an active part in ensuring that backend releases meet airapps' standards for quality and stability.

Role overview apaleo is looking for a Staff Backend Engineer with expertise in .NET to join the team in Munich. The main focus is on designing, building, and maintaining backend services that power apaleo’s hospitality products. What you will do Design and implement backend systems using .NET technologies Maintain and enhance existing services for better reliability and performance Collaborate with engineering, product, and design teams to develop scalable solutions Contribute to delivering a strong user experience through robust backend systems Location This role is based in Munich.

Hypersonica, based in Munich, develops defense technology to advance Europe's hypersonic capabilities. The team moves quickly from concept to solution, focusing on speed, resilience, and technological independence. As a small group of specialists, Hypersonica tackles complex technical challenges that shape the future of the industry. Role overview The Senior Ground Software Engineer position is central to Hypersonica’s mission. In this role, engineers help define current projects and influence the company’s technical direction. The team values broad technical knowledge, independent work, and sound judgment. Each person’s contributions directly affect both project outcomes and Europe’s technological autonomy. What makes this role unique Responsibilities are flexible and may shift as business needs or personal strengths evolve. Work has a direct, visible impact on both projects and the broader mission. Collaboration takes place within a close-knit, highly skilled team where every member plays a crucial part. What we look for Engineers who have solved difficult problems or worked across traditional boundaries. People with deep technical expertise, practical judgment, and the ability to work independently. Individuals motivated to define and deliver the next generation of European defense technology. Hypersonica encourages applications from those who recognize themselves in this description.

Role overview Celonis SE is looking for a Senior Software Engineer to focus on Provisioning and Licensing in Munich, Germany. The role centers on building and enhancing software that automates provisioning workflows and improves licensing management for the company’s products. What you will do Design, develop, and maintain software solutions that support provisioning and licensing processes. Collaborate with colleagues in engineering, product, and other teams to deliver systems that scale and perform reliably. Use modern technologies to create software aligned with client needs and business objectives. Location This position is based in Munich, Germany.

Join comstruct, a pioneering platform revolutionizing materials procurement for the construction industry, as we lead the transition towards advanced digital and automated processes. We are on the lookout for extraordinary talent to help us provide smarter, more efficient solutions that empower our clients.We are seeking a dedicated and talented full-time Senior Software Engineer to become a vital part of our Core team. In this role, you will be instrumental in enhancing and scaling our Integrations platform, facilitating its evolution into comstruct’s Data Processing system.Your responsibilities will include broadening our scope to encompass the ingestion, processing, and integration of all essential data, such as invoices and external ERP systems.As a technical leader, you will spearhead this transformation. Your initial major project will involve designing and directing the complete rewrite of our delivery note ingestion pipeline, transitioning us to a modern, asynchronous, queue-based architecture that aligns with our ambitious vision.As a hybrid workplace, we cherish in-person collaboration and require employees to work from our Munich office three days a week.Your Responsibilities Lead Systems Design: Drive the technical design and implementation of our innovative asynchronous data processing platform.Build Data Pipelines: Develop and scale systems for data ingestion and processing from various sources (emails, APIs, portals) and integrate with external systems (ERPs).Own Data Extraction: Take charge of our data extraction services, including our existing LLM-based solutions, while enhancing and scaling them.Expand Team Ownership: Assist the team in adopting new responsibilities, such as invoice processing and managing our public API, to ensure a cohesive approach to data processing.Provide Technical Leadership: Serve as a senior technical authority within the team, contributing to high-quality designs, offering insightful code reviews, and mentoring fellow engineers informally.Improve Existing Systems: Evaluate and enhance the architecture, reliability, and performance of our current integration services.Qualifications Needed for Success Experience: A minimum of 5 years of professional experience in building and maintaining complex, mission-critical software solutions.Strong Engineering Fundamentals: Demonstrated expertise in modern high-level programming languages and software engineering practices.

At Wemolo, we're not just another tech company; we're trailblazers in modernizing traditional parking management!Are you ready to embark on a thrilling journey with us? Our product-centric culture encourages you to take initiatives and see them through to completion. We nurture innovation and personal growth, empowering you to take charge of your development.We seek a highly skilled and passionate Senior Software Engineer (all genders) to join our vibrant engineering team in Munich. In this role, you will design, develop, test, and maintain innovative software solutions that propel our business forward and enhance user experiences, playing a crucial part in redefining the future of parking.You will own your projects while collaborating closely with the Product Manager and a talented team of engineers to ensure our systems are efficient, scalable, and aligned with business objectives. This is a unique opportunity to significantly impact the success and evolution of our products, solidifying Wemolo's position as an industry leader.Dive into a creative and challenging environment where your skills will advance our mission. If you're driven by technology, eager to tackle complex challenges, and excited to thrive in a fast-paced, innovative atmosphere, we’d love to connect with YOU!

Join our dynamic IT team as a Senior Software Engineer specializing in Solr. This remote position offers you the chance to work with cutting-edge technologies and contribute to innovative projects. You will be responsible for designing, developing, and maintaining scalable search solutions using Apache Solr, optimizing performance, and ensuring high availability.The ideal candidate will possess a strong background in software engineering, exceptional problem-solving skills, and a passion for technology. You will collaborate with cross-functional teams to deliver high-quality software solutions that meet our clients' needs.

Emidat creates digital infrastructure aimed at making construction more sustainable. The team focuses on a climate-native product management system for building material manufacturers, capturing data from production processes to generate digital product passports with verified environmental details. This approach helps reduce the 11% of global greenhouse gas emissions linked to building materials and supports better choices throughout the supply chain. More about Emidat’s mission, team, and values is available in their Company Overview. Role overview This Senior Software Engineer position in Munich focuses on building software tools for environmental impact assessment in manufacturing. The work involves translating production data into Lifecycle Assessments (LCA) and supporting Environmental Product Declarations (EPD) that comply with international standards. The goal: turn complex environmental science and ISO/EN standards into software that is clear, auditable, and easy to use. Ownership is a core part of this role. The Senior Software Engineer defines, delivers, and measures the impact of product features, often working directly with users and stakeholders. High autonomy and accountability are expected. Key responsibilities Take features from concept to deployment: engage with manufacturers, build tools to improve environmental performance, and refine solutions using user feedback. Lead the expansion of LCA and EPD generation into new product categories and markets by identifying gaps, setting priorities, and delivering solutions. Collaborate with LCA experts to translate complex standards into maintainable software abstractions. Technology stack Languages: Python, TypeScript Backend: FastAPI, gRPC

airapps is looking for a DevOps Engineer focused on backend development to help build and maintain scalable cloud-based systems. This position is based in Munich and works closely with teams across the company. Role overview This role centers on designing, implementing, and supporting backend infrastructure for airapps’ cloud applications. Collaboration with cross-functional teams is a key part of the job, ensuring that backend solutions meet business needs and technical standards. What you will do Work with teams to design and maintain backend systems for cloud-based products Use expertise in cloud services, automation, and infrastructure management to improve deployment processes Support and enhance CI/CD pipelines to increase system reliability Contribute ideas and technical solutions that help drive operational efficiency Requirements Experience with cloud services and backend infrastructure Knowledge of automation and deployment processes Ability to collaborate with cross-functional teams Strong problem-solving skills and an innovative approach

About UsAt Supermodular AI, we empower enterprises to successfully navigate the complexities of AI Transformation. Our philosophy revolves around executing strategies that drive real change.While many organizations grasp the potential of AI, they often struggle to implement it effectively within their existing workflows and systems. The real challenge lies not in the technology itself, but in integrating AI into established processes that have been shaped over time. We believe that effective AI transformation cannot be confined to theoretical strategy documents; true progress is achieved through active building, deployment, and operation of AI systems within organizations.Our approach involves collaborating closely with enterprise IT and software teams to design and implement AI solutions in practical environments. We enable engineering teams to adopt innovative AI-native development practices, frameworks, and technical resources that revolutionize how software is built and maintained. This includes constructing bespoke AI systems that facilitate modernization and harmonization efforts when traditional methods have faltered.Our team boasts a proven track record in developing impactful AI systems and scaling engineering teams within intricate enterprises. If you thrive on addressing complex enterprise challenges and transforming ambitious concepts into operational systems, you will find your place at Supermodular AI.Your ResponsibilitiesIn your role as a Senior Forward Deployed Software Engineer, you will directly collaborate with enterprise IT and software teams to translate AI ambitions into functional systems operating in production environments.You will immerse yourself in real enterprise settings, working alongside engineers and technical leaders to comprehend current system operations and identify opportunities where AI can deliver substantial impact. Your work will involve navigating complex system landscapes, pinpointing opportunities, conceptualizing practical solutions, and constructing the systems that actualize these solutions.Your engagement will encompass the entire project lifecycle. You will contribute to shaping technical strategies early on, designing architectures that adhere to enterprise limitations, and implementing systems that yield tangible operational enhancements.Many challenges you face may not be clearly defined at the outset. Your role will be to clarify these environments by proposing actionable solutions and developing systems that advance the organization. At its essence, this position focuses on building systems that convert AI aspirations into operational capabilities.

OUR VISIONAt NavVis, we empower individuals through our cutting-edge technology that seamlessly connects the physical and digital realms. Our solutions not only capture reality but also inspire creativity, productivity, and innovation, laying down a digital foundation that transforms the world.We provide tools that allow our users to visualize their environment as it is while also paving the way for a better future. Whether physical or digital, NavVis is committed to enabling people to shape a reality that enhances their lives.THE OPPORTUNITYJoin our Mapping and Perception Team and engage in the development of software and components for our state-of-the-art mobile indoor mapping system, utilized by organizations in over 25 countries globally.In this role, you will contribute to the creation of software solutions that map entire buildings and generate realistic 3D representations, including maps, point clouds, and panoramic images, leveraging the latest advancements in robotics technology.We are a diverse, international team, and if you are passionate about software engineering and eager to create transformative indoor digital experiences, this is the perfect opportunity for you!HOW YOU WILL MAKE AN IMPACTYou will design and architect the core software stack that powers our innovative mapping solutions.Collaborate with cross-functional teams to enhance product features and functionality.Implement best practices in software development and contribute to the overall engineering culture.