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.

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