Senior Software Engineer

Celonis; New York (NY); On-site; USD 161,000 - 218,000; Full time

Benefits offered by this job

RSUs

Merit-based refresh grants

24 weeks parental leave

Unlimited PTO

Job summary

Celonis in New York is seeking a senior backend C++ Software Engineer to design and optimize our core mining and query engine for large-scale data processing.

You will implement high-performance features, improve execution plans, and mentor teammates while helping scale a multi-cloud platform. A strong background in database internals and modern C++ is required, with opportunities to shape the future of process mining.

Qualifications

• BS in Computer Science; MS/PhD preferred.
• 3+ years hands-on software engineering experience.
• Experience with database internals and large-scale data processing.

Responsibilities

• Identify and implement novel query optimization, transaction management, or distributed data processing algorithms in the Core Mining Engine.
• Analyze and understand performance and scalability bottlenecks in the system and solve them.
• Deal with issues from execution plan to resource management and parallel vectorized execution.
• Design and implement high-performance systems to handle increasing request rates on the database.
• Mentor teammates and promote best practices in development and architecture.
• Document procedures and contribute to a growing engineering culture.

Skills

C++ (17)

Big data

Algorithm analysis

Query optimization

Data structures

Analytical mind

Education

BS in Computer Science

MS/PhD preferred

Tools

StarRocks

ClickHouse

Job description

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

Come join us on the ground floor on a team led by experienced ex-FAANG coworkers dedicated to developing state-of-the-art technology for Celonis products. The team creates foundational solutions such as a mining engine that enables our customers to interactively execute process mining over enterprise-sized data sets, as well as innovative object-centric modeling tools that empower users to perform process-oriented business analysis in a natural and powerful way. In order to handle the strong growth of our customer base and their demands, we are heavily investing in performance and scalability to ensure that our platform scales efficiently and dynamically in a multi-cloud environment.

Join us if you want to grow in your engineering knowledge, your career and leave your mark on a rapidly growing company.

The Role

We are looking for senior backend developers who enjoy building systems with the capability to manage big data. Within our Query Engine and Core Mining teams, we are looking for a senior C++ Software Engineer, who develops and implements new features and algorithms for our core engine and increases the reliability and performance of existing components. With your general knowledge of working with modern C++, coupled with experience in developing high-performance large-scale data processing systems, you will create new, innovative algorithms and operators for our query engine.

The work you'll do

• Identify and implement novel query optimization, transaction management, or distributed data processing algorithms in the Core Mining Engine
• Analyze and understand performance and scalability bottlenecks in the system and solve them
• Deal with issues from logical representations of the execution plan to efficient resource management, all the way down to highly parallel vectorized execution
• Design and implement critical high-performance systems to handle the ever-growing request rate on our database
• Evangelize best practices in database usage and end-to-end architecture
• Set an example for and mentor and grow your teammates
• Recognize and take action to improve the developer work environment
• Write clean, understandable, and testable code
• Provide feedback on the designs and code of peers
• Manage individual project priorities, deadlines, and deliverables
• Document development procedures, concepts and knowledge
• Build, launch, and maintain features in production
• Help define a fun and inclusive engineering culture

The qualifications you need

• BS in Computer science; Masters or Ph.D. preferred
• 3+ years of hands‑on software engineering experience
• Significant background in database internals or building core components (query optimization, query execution, storage engines, transaction processing) for large-scale data processing systems (e.g., Starrocks, ClickHouse, etc)
• Experienced in programming with C++ (17)
• Have an analytical mind and a good understanding of complex data structures and algorithms in data management
• Have a curiosity about how things work and a desire to improve them

The base salary range below is for the role in the specified location, based on a Full Time Schedule.

Total compensation package will include base salary + bonus/commission + equity + benefits (health, dental, life, 401k, and paid time off). Please note that the base salary range is a guideline, and that the actual total compensation offer will be determined based on various factors, including, but not limited to, applicant's qualifications, skills, experiences, and location.

The base salary range below is for the role in New York, based on a Full Time Schedule.

$161,000 - $218,000 USD

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 gen