Senior Data Engineer (f/m/d)

GROPYUS

About The Company GROPYUS is a technology-based construction company focused on building multi-story residential buildings. Thanks to its prefabricated building system with various design options, industrial offsite construction, and fully digitalized processes, the company manufactures aspirational, sustainable, and affordable homes using timber construction methods. GROPYUS is using scalable construction and manufacturing solutions to tap into a future market, boost Europe's strength in innovation, while also playing a substantial role in improving sustainability. About The Role: We are growing our Data Platform Team within the Gropyus Tech department. Our Platform team is responsible for our internal platform, the Gropyus Data Fabric.   Our team interacts with experts from various domains such as Digital Building Planning and Automation, Product Operations, Sustainability, AI, IoT, construction engineers, building architects, logistics experts, software engineering; solving complex challenges pertaining to end-to-end process for planning, building, and operating a building.   What You Will Be Doing: As part of the Data Platform organization, you will:  * Design, build, and maintain core data platform components, including ingestion frameworks, transformation pipelines, and data storage layers   * Own and improve data reliability through monitoring, alerting, SLAs, and data quality checks  * Collaborate with domain experts and software engineers to understand data needs and deliver high-quality datasets.  * Lead strategic initiatives to modernize or scale our data ecosystem (including query optimization, schema design, analytics, etc)  * Mentor and guide team members to elevate engineering rigor and technical capability  What You Bring:  * Experience working with a tech stack similar to:  * Programming languages like Python or Kotlin.  * Databases like Postgres, BigQuery, Spark, Graph DB  * Tools like: Kubernetes, Docker, Terraform, Dagster, DBT  * Cloud Storage Platforms   * You have strong problem-solving and analytical skills and the ability to break down complex tasks for operations including working with stakeholders, adapting to dynamic input, and leading implementation projects  * You have experience identifying and resolving issues related to data discrepancies and inconsistencies and creating validation and testing for prevention and handling  * You have experience in building, operating, and scaling data intensive reactive processing pipelines from end to end including ingestion, storage, orchestration, transformation, enrichment, and analytics  Optional Experience:  * Some knowledge about semantic web technologies like RDF and OWL  * Experience with ontology engineering, and knowledge engineering topics, including using ontology engineering tools such as Protege  * Experience working with construction industry data and / or complex and large datasets  * Data Science, Machine Learning and AI agents   What we offer: * Be part of something big: You’re here to make a change? Come on board. At GROPYUS, we are on a mission to re-think an entire industry. Join us in reinventing construction and sustainable, affordable living.  * It’s on you: We offer a tremendous amount of ownership and room to make a mark - at all our organization levels. Find your solutions, drive and test them. * Focus on results: You choose if you work from home, a park, or the office. Whether you start your day early, after your run, or pick up on work when your kids are in bed. What counts is your contribution and delivery. * Bring your uniqueness to the team: Innovation requires diversity of thought. Diversity in background, experience and thinking is crucial to create the best product for everyone. We actively seek diversity and strive to unlock each other’s full potential. We are very proud that people from all industries and all walks of life are joining our company – in addition to core areas such as construction, engineering, and start-ups, from stock-listed companies from across automotive e-Commerce, digital, sporting goods, and more. You will work in international teams with passionate colleagues. Inspire and be inspired. * Be an owner: Participate in the success of GROPYUS through stock options. JOIN US ON OUR MISSION TO DESIGN BUILDINGS AS CONTINUOUSLY EVOLVING PRODUCTS TO CREATE THE MOST EXCITING AND AFFORDABLE EXPERIENCE FOR ALL. WE BUILD FOR PEOPLE AND CONSERVE THE RESOURCES OF OUR PLANET. WE CAN'T WAIT TO GET TO KNOW YOU.  FOR MORE INFORMATION, VISIT OUR WEBSITE, AND IF YOU HAVE ANY QUESTIONS, PLEASE REACH OUT TO US VIA EMAIL.

IDnow

IDnow is a leader in digital identity and fraud prevention in Europe with a mission to transform trust into the most powerful asset in the digital world, empowering enterprises with AI-driven, SaaS-based identity solutions that deliver scalable security, adaptive compliance, and real-time fraud prevention. Through its broad portfolio of digital identity and fraud prevention solutions, IDnow establishes, maintains and enriches trust throughout the customer journey, ensuring businesses can confidently and securely operate while leveraging digital identity to drive growth, security and scalability. The company has offices in Germany, United Kingdom, Romania and France, and is backed by renowned institutional investors, including Corsair Capital and Seventure Partners. Its portfolio of international clients spans a wide range of end markets including financial services, telecommunications, travel & mobility, gaming, and other industries. This position is based in Rennes, France. Europe's leader in identity verification solutions (KYC, eSigning, IDcheck, etc.), is strengthening its RDM (Research Data Management) division. We are looking for a Senior Data Engineer passionate about data and industrialization to design and operate the tools and data storage that power our software and AI research. The data you'll manage is at the core of what IDnow does: identity documents, biometric data, and verification records, sensitive by nature, regulated by design, and technically challenging to handle at scale. You will play a key role in the design and construction of our next-generation data lake, shaping its architecture from the ground up and bringing your experience to a team that values technical leadership and ownership.   KEY RESPONSIBILITIES   * Define and own data storage and data management architecture for our software and AI/ML workflows. * Develop and maintain tools and services that AI & ML R&D teams and engineering teams rely on, including workflow orchestration platforms and test campaign infrastructure. * Manage and analyze large data volumes. * Set up and maintain backend APIs and services that provide reliable and secure internal data access. * Operate and evolve the platform infrastructure (CI/CD, containerization, deployments) with a strong focus on quality (automated testing). * Enforce data access policies and GDPR compliance rules on research datasets, ensuring proper governance, traceability, and data minimization. * Collaborate closely with internal stakeholders (ML teams, product design and development, QA, devops) in an agile environment to prioritize and deliver within a continuous improvement process. * Enforce data access policies and GDPR compliance rules on research datasets, ensuring proper governance, traceability, and data minimization.     PREFERRED EXPERIENCE   REQUIRED: * Application development in Python (tooling, services, data scripts, packaging). * API frameworks and REST APIs (FastAPI/Django REST or equivalent). * Automated testing with pytest; strong quality and coverage mindset. * SQL databases: solid knowledge of PostgreSQL and MariaDB (modeling, query writing, migrations, basic performance tuning). * Data storage: design and operation of data storage solutions, including S3-compatible object storage (Ceph/Rook). * Docker and Kubernetes: containerization best practices and cluster deployments. STRONG PLUS: * Helm and ArgoCD: we are currently migrating our full stack to a Kubernetes + Helm + ArgoCD deployment model, hands-on experience here is a significant advantage. * Identity and access management: Keycloak or equivalent SSO/IAM solutions. * Search & analytics: OpenSearch or equivalent. * CI/CD: GitLab CI, deployment automation (Ansible, ArgoCD). WORKING ENVIRONMENT * Multidisciplinary teams (AI/ML research, development, QA), agile methodology. * Internal clients with a direct impact on the speed and quality of AI research at IDnow. * Strong technical culture, with mutual support and continuous growth. * A technically rich domain where AI, security, and privacy constraints intersect. * Linux: day-to-day administration and tooling (shell, security, permissions, networking). WHAT YOU’LL BRING * The ability to translate R&D needs into robust, scalable, and well-tested data platforms and tools. * Technical leadership on data lifecycle management (ingestion, storage, access, traceability) in service of AI and testing. * The ability to drive key architectural decisions on our data lake: storage organization, access patterns, data lifecycle, and tooling choices. * An industrialization mindset (automation, reproducibility, observability) applied to ML and data workflows. SOFT SKILLS * Motivation and initiative. * Curiosity, appetite for technical challenges, and continuous learning. * Team spirit, clear communication with diverse stakeholders (engineers, researchers, QA, devops). * Rigor, service orientation, and product mindset. * English required (international environment).     PERKS & BENEFITS * Health & Wellbeing: Use your full access to the mental health platform nilo, including 1on1 sessions. * We value personal and professional development: make full use of Udemy, our training platform with 24/7 access and unlimited content/course consumption incl. certification. * We make your remote work comfy: we provide support on equipment and offer flexible working hours. * We value collaboration & love to come together: regular onsite gatherings, internal initiatives and summer parties to connect outside of work. * May your family require your attention or other reasons apply: use the benefit of our paid special leave days. * Enjoy the possibility to combine work with a longer stay at your holiday destination or extend a weekend with our Workcation possibilities. * In addition to the perks & benefits above, we offer specific benefits that differ between our locations.   IDnow applies the principles of non-discrimination and equality: We strive to establish, maintain, and promote an open and inclusive recruitment process and working environment by respecting the principles of equal opportunities. Including but not limited to: sex, race or ethnic origin, religion or convictions, gender identity, citizenship, marital status, disability, age, or sexual orientation.

ZEAL Network

ZEAL Network SE is an international group shaping the future of digital lotteries and dream-driven experiences. As Germany’s leading online lottery provider through LOTTO24 and Tipp24, and a partner of Spain’s ONCE, ZEAL combines innovation, technology, and entertainment to inspire millions of customers. With ventures such as Freiheit+, Traumhausverlosung, Traumautoverlosung and ZEAL Ventures, the company also invests in new business models and emerging e-commerce brands. Driven by a diverse team of 350+ professionals, ZEAL fosters a collaborative, ambitious culture focused on turning dreams into reality.   THE ROLE: As a Senior Data Engineer, you'll be at the forefront of modern data tech, driving the development of our data ecosystem. Here's what you'll dive into:   YOUR TASKS: * Seamlessly collect, process, store, and optimize company data to unlock its full power. * Develop cutting-edge data solutions from the ground up, collaborating with various stakeholders from design to deployment. * Identify automation opportunities for existing and new applications to enhance efficiency. * Create a DataOps strategy and champion best practices to ensure data reliability and scalability. * Innovate and enhance data quality and architecture within your scope. * Push the boundaries of innovation by embracing the latest technologies and methodologies.   WHAT YOU OFFER US: * Proficiency in Agile Software Development methodologies. * Comfortable with Python, Kotlin, and Golang, and eager to explore new data technologies. * Proficient in ML frameworks and libraries, able to work closely with Data Scientists to optimize data solutions. * Technical Chops: Experience in architecting and developing production-grade data solutions. * Passionate about working with large-scale datasets, highly skilled in SQL and big data tools like Kafka. * Proficient in Cloud Data Warehouse systems such as Redshift, Snowflake, or BigQuery. * Familiar with Modern Data Stack, Data Mesh, GitOps, and ideally experienced with dbt. * Ability to translate business needs into technical requirements effectively. * Confidence in working with AI tools like Claude Code are a nice to have. * Strong communication skills in English with a collaborative spirit.   WHAT WE OFFER: * State-of-the-art technologies and an agile environment (Check our Tech Radar: https://lotto24.github.io/tech-radar/) * A modern, dynamic culture grounded in the success of a leading-edge e-commerce company. * A talented team of ambitious, like-minded colleagues where your knowledge and ideas truly make an impact. * Ongoing personal growth, supported by an annual development budget of €1,500 to invest in your professional development. * Trust and autonomy, no micromanagement, just confidence in your ability to deliver and excel. * Flexible work options with a hybrid setup focused on results. * Unlimited vacation days in addition to your yearly 30-day vacation allowance. * Opportunity for workations abroad using our WorkFlex tool. * Monthly mobility allowance of €30 to use on the mobility option of your choice (e.g., the Deutschlandticket), plus access to a company bike leasing program. * Company pension scheme, provided in partnership with Degura, to support your future financial security. * Subsidized EGYM WELLPASS membership, with a contribution of only €25 per month, giving you access to a wide range of gyms and sports options across Germany. * Quarterly company events, along with regular team activities and informal gatherings, a favorite being our Healthy Tuesday lunches or Treat Thursdays in the office!