Machine Learning Engineer

Join to apply for the Machine Learning Engineer role at CarTrawler

CarTrawler is the world's leading provider of car rental and mobility services to the global travel industry. If you've ever booked a flight and seen the option to rent a car, that was probably us.

But it's our people that make everything we do possible – and we'd love you to join us.

At CarTrawler, you'll find more than just a job. You'll find flexibility, meaningful impact, and a culture built by the people who live it every day. Whether you're developing new products, shaping customer journeys, or helping us scale, you'll be supported to do your best work, and enjoy the journey along the way. Our work culture is built on high performance, genuine connection, and a shared commitment to making an impact, without sacrificing personal wellbeing.

• Support the development and maintenance of software tools that underpin Data Science solutions and operations, using modern technologies (e.g. AWS, Docker, Kubernetes) to contribute to improved business performance.
• Collaborate with business stakeholders and engineering teams to gather requirements and contribute to the design and implementation of solutions.
• Assist in maintaining and enhancing existing tools/services developed by the Data Science team.
• Build CI/CD pipelines and contribute to testing, logging, and monitoring processes under guidance.
• Participate in code reviews and follow CarTrawler best practices for clean, maintainable code.
• Continuously develop technical skills and support the wider team, working under the mentorship of senior engineers.

• Collaborating with team members and stakeholders to understand project requirements and identify areas where support is needed.
• Staying up to date with developments in Data Science and DevOps to help ensure our tech stack remains current.
• Contributing to the development of Data Science engineering solutions by:
• Supporting data collection, cleaning, and preparation based on identified requirements.
• The implementation of engineering solutions using appropriate tools and technologies.
• Following best practices for CI/CD, testing, logging, and monitoring under guidance.
• Writing scalable, production-ready code, with support from senior colleagues.
• Participating in deployments and monitoring the solution impact.
• Supporting ongoing development and maintenance of internal Data Science tools/platforms, such as:
• MVT – Multi-variate testing platform.
• ACDC – Cloud-based ML deployment tool.
• Action Factory – Automated decision-making platform.
• Echo – MLOps pipeline management tool.
• Various internal Python libraries and utilities.
• Assisting with BAU tasks and ongoing support of tools and services provided by the Data Science team.
• Clearly communicating updates and progress to team members in a way that suits both technical and non-technical audiences.
• Participating in proof-of-concept projects, helping to explore innovative solutions and learning how to analyse and interpret data effectively.
• Taking ownership of personal development by seeking guidance and feedback from mentors and contributing positively to a collaborative team environment.

• Undergraduate degree in Computer Science, Engineering, Mathematics, or related technical field, or relevant internship/industry experience.
• Good understanding of software engineering and DevOps practices (e.g. Jenkins, Github Actions), including Object-Oriented Programming, data structures, version control, REST APIs, and containerisation tools (e.g. Docker, Kubernetes).
• Exposure to cloud platforms such as AWS or Azure.
• Experience with developing GenAI applications, or surrounding tech stack (e.g. Vector DB, NLP, LLM) seen as a plus.
• Proficient in writing clean, structured Python code; familiarity with common Python libraries used in data science and machine learning.
• Comfortable using version control systems (e.g. Git) and basic development workflows (commits, branches, pull requests).
• Exposure to ML libraries (e.g. scikit-learn; bonus for familiarity with TensorFlow or PyTorch).
• Willingness to learn test-driven development and build basic unit and integration tests with support.
• An interest in learning about production considerations like resource constraints and scalability.
• Basic SQL skills; exposure to other database types (graph, NoSQL) is a plus.
• Strong communication skills with a desire to learn how to present technical concepts clearly to varied audiences.
• A proactive and curious mindset, with a collaborative approach to learning and team engagement.
• Experience with developing GenAI applications or of supporting tech stack seen as a plus

Note: Research shows that individuals from underrepresented backgrounds often hesitate to apply for roles unless they meet every single qualification. If you believe you have the skills and potential to succeed in this role, even if you don\'t meet every listed requirement, we encourage you to apply. We'd love to hear from you and explore whether you could be a great fit.

Location: Dublin, Ireland