Senior Software Engineer - Query Engine & Database Systems

Celonis is the trusted platform to industrialize Enterprise AI. At our core is the Celonis Context Model — which combines process data, business knowledge, and intelligence into a living digital twin of the enterprise that AI can actually understand, turning AI's operational blind spots into operational clarity. World's leading companies trust Celonis and its global ecosystem of partners to make their AI agents, people, systems, and processes work together, achieving transformational outcomes. We believe there's a massive opportunity to unlock global productivity and sustainability by giving AI the context to understand how every business process really works. Join our mission to make processes work for people, companies, and the planet. The Team: You will be part of a team that owns the Process Query Engine which is an analytical database and our core product for process mining that enables our customers to interactively mine enterprise-sized data sets. In order to handle the strong growth of our customer base and their demands, we are continuously expanding our Engine domain and heavily invest in the performance and scalability of our engine. The Role: For the Core squad of our Process Query Engine team, we are looking for a Software Engineer with solid experience in system programming and the skills to build a highly parallelized and distributed database with modern C++ and Java. As part of a talented engineering team, you’ll develop and implement new concepts and algorithms for our Process Query Engine, take ownership of our solutions to increase reliability and performance, and drive initiatives to shape future innovations. The work you’ll do: • Develop new concepts and algorithms for data management and query execution • Challenge and benchmark our solutions using performance engineering principles • Shape and contribute to our development and maintenance processes • Communicate and coordinate with stakeholders and customers • Take responsibility for the performance, scalability, and reliability of our solutions • Support in problem-solving and optimization • Mentor project teams and more junior engineers • Lead projects and define technical roadmaps • Take full responsibility from end-to-end - from problem to solution The qualifications you'll need: • University degree in Computer Science or comparable education • Experience in system programming with modern C++. Other languages, Java in particular, are a plus • Solid knowledge in one or more of the following areas: Parallel Computing, Distributed Systems or Database Internals • Experience in software development for productive systems (as senior 5+ years) • Experience in cloud engineering, Linux systems, infrastructure as code, build systems, performance monitoring is a plus • An analytical mindset with great understanding of performance and algorithms • Excellent communication skills in English, German is a plus What Celonis can offer you: • Pioneer Innovation: Work with the global leader in Process Mining and the Process Intelligence Graph to shape the future of AI-driven business operations. • Ownership from Day 1: Every full-time "Celonaut" is an owner, receiving Restricted Stock Units (RSUs) and merit-based refresh grants. • Unrivaled Family Support: Benefit from our inclusive parental leave policy—24 weeks of fully paid leave for primary carers and 12 weeks for supporting carers, available from your first day of employment. • Work-Life Integration: Enjoy Unlimited PTO (in applicable regions) and generous PTO globally, as well as a flexible hybrid work model that balances remote focus with vibrant office collaboration. • Continuous Growth: Elevate your skills through our 70-20-10 learning framework, mentorship programs, and access to a dedicated learning platform. • Holistic Well-being: Prioritize your health with subsidized Wellhub memberships, mental health counseling, and dedicated "Wellness Weeks" that prioritize work/life balance. • Drive Sustainability: Participate in annual Impact Days, where you receive paid time off to volunteer for community and environmental causes with your local office, or virtually. • Global Inclusion & Belonging: Find community through our Inclusion Think Tank and participate in our annual Inclusion Days, ensuring every voice is heard and valued. • Value-Driven Impact: Join a mission-led organization where our core values—Live for Customer Value, The Best Team Wins, We Own It, and Earth Is Our Future—drive every decision. About Us: Celonis is the trusted platform to industrialize Enterprise AI, empowering organizations to analyze, design, and operate AI-driven processes. The Celonis Platform is powered by the Celonis Context Model, which combines process data, business knowledge, and intelligence to create a living digital twin of the enterprise that AI can understand — turning AI’s operational blind spots into operational clarity. Industry-leading companies around the world trust Celonis and its global ecosystem of partners to make their AI agents, people, systems, and processes work together, achieving transformational outcomes. Celonis is headquartered in Munich, Germany, and New York City, USA, with more than 20 offices worldwide. Get familiar with the Celonis Process Intelligence Platform by watching this video. Celonis Inclusion Statement: At Celonis, we believe our people make us who we are and that “The Best Team Wins”. We know that the best teams are made up of people who bring different perspectives to the table. And when everyone feels included, able to speak up and knows their voice is heard - that's when creativity and innovation happen. Your Privacy: Any information you submit to Celonis as part of your application will be processed in accordance with Celonis’ Accessibility and Candidate Notices By submitting this application, you confirm that you agree to the storing and processing of your personal data by Celonis as described in our Priva