Lead Machine Learning Engineer

Join Us in Making Cities Greener and More Sustainable

Are you passionate about using technology to combat climate change and enhance urban living? At greehill, we’re looking for a Lead ML Engineer to help us shape the future of sustainable cities. Join our mission to make urban environments around the world greener, healthier, and more resilient.

Who We Are

greehill is a global leader in nature-based smart-city solutions, driven by a passion for sustainability and innovation. We harness advanced technologies like remote sensing and machine learning to transform urban green spaces. Our cloud-based platform empowers cities to improve citizen well-being while reducing operational costs, using data from LiDAR scanners and camera systems to create digital twins of urban trees. With offices in Budapest, Hannover, Singapore, San Francisco, and Paris, we’re driving sustainability on an international scale.

Your Role

As a Lead ML Engineer, you’ll act as a technical leader, combining deep technical execution with mentorship, architectural ownership, and strategic input. You’ll be responsible for scaling our ML systems, shaping the technical roadmap, and guiding a high-performing ML team in building production-grade solutions for real-world urban challenges.

Key responsibilities:

• Architect and lead the development of large-scale ML systems and model pipelines
• Introduce new ML systems, such as traffic sign detection, building facade detection, and other computer vision-based solutions
• Define and drive the ML technical roadmap in alignment with company objectives
• Act as a technical mentor and leader for other ML engineers
• Facilitate cross-team collaboration with product, engineering, and domain experts
• Ensure engineering excellence through robust review processes, documentation, and technical standards
• Own and refine deployment processes for real-time and batch ML services
• Evaluate emerging tools, techniques, and architectures, and apply them strategically
• Support technical decision-making across ML architecture, data pipelines, model development, and deployment

We’re seeking candidates with:

• 5+ years of experience in ML/AI, with a strong focus on production-grade computer vision and deep learning models
• Expert-level Python and PyTorch skills
• Deep knowledge of scalable ML systems, data lifecycle management, and MLOps practices
• Proven technical leadership experience, including mentoring engineers, leading projects, or guiding ML teams
• Strong architectural thinking and the ability to make pragmatic technical decisions
• Strategic thinking and excellent communication skills
• A passion for sustainability and real-world applications of ML
• Experience with complex algorithms and large-scale data processing

We value if you have experience in:

• Managing, mentoring, or helping build small ML teams
• Remote sensing, GIS, LiDAR, or point cloud data
• Workflow orchestration tools such as Airflow
• DevOps practices and tools, including Docker and Kubernetes
• Cloud ML environments, especially Azure
• Technical hiring, interviewing, and team scaling

Why Join Us?

At greehill, we’re assembling a team of curious, purpose-driven, out-of-the-box thinkers eager to tackle a high-impact mission. You’ll help shape the future of cities worldwide, making them more sustainable and resilient, with the chance to see the tangible impact of your contributions in urban environments.

• Make a direct impact on climate adaptation and the future of cities through technology that actually gets used
• Work on meaningful, real-world problems at the intersection of AI, sustainability, and urban tech
• Join a fast-growing, international team with real freedom to shape both the product and your role
• Learn, experiment, and grow with talented, curious (green-)tech experts who genuinely care about what they build
• Develop yourself continuously with access to LinkedIn Learning and hands-on learning every day

How we work – We believe the best ideas happen when people spend time together. That’s why we work 4 days a week from the office, with 1 day from home, creating space for collaboration while still keeping some freedom.

The position is based in Budapest /Hungary/ so relocation might be needed from your side.

If you’re ready to contribute to a mission that counts and collaborate with driven professionals, join us at greehill.

We appreciate the interest of all job seekers in our organization. However, please note that at this time, we are unable to consider applications from outside of Hungary, who require a work permit for this position. We thank you for your understanding and encourage you to explore other opportunities with greehill in the future.