Principal Machine Learning Engineer, Search Platform
OLX Group
full-time
Posted on:
Location Type: Remote
Location: Remote • 🇵🇱 Poland
Visit company websiteJob Level
Lead
Tech Stack
AWSCloudDistributed SystemsJavaKotlinPythonPyTorchTensorflow
About the role
- Shape the future of AI-powered search across all OLX verticals. You’ll drive the technical vision, guide a multidisciplinary team, and ensure our Search AI Platform becomes a foundation for scalable, intelligent discovery experiences for millions of users.
- Lead the design and evolution of OLX’s Search AI Platform, developing LLM- and GenAI-based systems that power discovery and relevance across Motors, Real Estate, Jobs, and Goods.
- Partner with the Principal Search Engineer to define and implement a unified technical strategy for search, ranking, and retrieval at scale.
- Guide a cross-functional team of ML engineers, data scientists, and platform engineers, fostering technical excellence, experimentation, and rapid iteration.
- Prototype, evaluate, and productionize new ML models, including embedding-based retrieval, personalization, and relevance optimization.
- Collaborate with product and analytics teams to define success metrics, integrate with A/B testing pipelines, and measure real customer impact.
- Mentor and inspire data scientists and ML engineers across OLX’s global hubs, sharing best practices and shaping the future of applied ML at scale.
- Stay hands-on, driving implementation in Python and AWS while exploring state-of-the-art advances in LLMs, GenAI, and search infrastructure.
- Promote a culture of learning and innovation, helping the team iterate fast, fail fast, and learn continuously.
Requirements
- Based in Poland with the ability to collaborate across global teams.
- Strategic and hands-on technical leader who thrives at the intersection of machine learning, large-scale systems, and product impact.
- Deep expertise in search and relevance, including ranking models, retrieval systems, and modern representation learning (e.g., embeddings, transformers).
- Proven experience designing and productionizing ML solutions at scale in real-world environments.
- Strong background in Generative AI and LLMs, with an understanding of their application to search and content understanding.
- Ability to inspire and lead cross-functional initiatives, aligning multiple teams toward shared technical outcomes.
- Proficient in Python and familiar with at least one other programming language (e.g., Kotlin, Java); experienced with ML frameworks such as TensorFlow or PyTorch.
- Solid understanding of data pipelines, experimentation frameworks, and distributed systems in cloud environments (preferably AWS).
- Exceptional analytical, communication, and stakeholder management skills, capable of translating complex ideas into actionable solutions.
- Passion for building systems that connect millions of users to what matters most, through better search, relevance, and personalization.
Benefits
- Permanent contract
- Salary + annual bonus up to 25% of your annual gross salary
- Work with and impact all OLX services in Europe
- Train and conference budget and free access to Udemy courses
- Health insurance and life insurance
- MacBook Pro along with the necessary accessories to make your work comfortable
- 100% remote work (and the possibility to work from our offices in Poznan and Warsaw)
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard skills
machine learninglarge-scale systemsranking modelsretrieval systemsrepresentation learningGenerative AILLMsPythonTensorFlowPyTorch
Soft skills
technical leadershipinspirationcross-functional collaborationanalytical skillscommunication skillsstakeholder managementmentoringinnovationproblem-solvingteam alignment