Senior Applied AI Scientist Location : Barcelona, Spain

Preply Inc.; Barcelona; Presencial; EUR 70.000 - 110.000; Jornada completa

Descripción de la vacante

Preply Inc. is seeking a Senior AI Scientist to lead the development of AI-driven personalized learning solutions. The role involves innovative R&D in deep learning and NLP, scientific leadership, and cross-functional collaboration. Candidates should have a PhD and extensive industry experience, with a passion for driving scientific innovation in education.

Servicios

Generous monthly allowance for lessons on Preply.com

Learning & Development budget

Competitive financial package with equity

Attractive relocation package

Access to mental health support platforms

Access to Gympass-partnered wellness centers

Formación

• 8+ years of industry experience focused on deep learning-based NLP and IR methods.
• Proven ability to lead scientific roadmaps and align them with business objectives.
• Strong understanding of retrieval-augmented generation (RAG) and LLMs.

Responsabilidades

• Lead the development of AI-driven personalized learning solutions.
• Design and deploy scalable machine learning solutions for intelligent tutor systems.
• Mentor scientists and engineers, fostering a collaborative science community.

Conocimientos

Deep learning

Natural Language Processing (NLP)

Information Retrieval (IR)

Machine Learning

Leadership

Collaboration

Educación

PhD in NLP, IR, Machine Learning

Herramientas

PyTorch

TensorFlow

AWS

Google Cloud

Descripción del empleo

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. So far, 90,000 tutors have delivered over 20 million lessons to learners in more than 175 countries. Every Preply lesson sparks change, fuels ambition, and drives progress that matters.

Meet the team!

As a Senior AI Scientist, you will lead the development of AI-driven personalized learning solutions and shape Preply's scientific roadmap. Working alongside exceptional scientists and engineers, you will architect state-of-the-art models and systems that enhance the experiences of millions of learners worldwide.

What you’ll be doing :

• Innovative R&D : Leverage your extensive experience in Deep learning, NLP, Information Retrieval (IR), LLMs and multimodal AI to design and deploy scalable machine learning solutions for personalized learning and intelligent tutor systems.
• Scientific leadership : Develop long-term scientific roadmaps, aligning them with Preply’s product strategy and business goals. Act as a strategic advisor to senior leadership on investments, technology direction, and organizational planning.
• Cross-functional collaboration : Partner closely with applied science leaders, product managers, and engineering teams to deliver AI solutions that address user needs and unlock new business opportunities.
• Mentorship & knowledge sharing : Guide and mentor scientists and engineers, fostering a collaborative and innovative science community within Preply.
• Drive best practices : Establish and advocate for best practices in machine learning, including architecture design, research roadmaps, and deployment pipelines.

What you need to succeed :

• Academic and professional background :

PhD in NLP, IR, Machine Learning, or related fields (or equivalent experience).

• 8+ years of industry experience, with a strong focus on deep learning-based NLP and IR methods.
• Scientific and technical expertise :

Demonstrated authority in retrieval models and extensive experience with ranking models.

• Strong understanding and experience with retrieval-augmented generation (RAG) and LLMs for real-world applications.
• Proficiency in deep learning frameworks such as PyTorch or TensorFlow.
• Hands-on experience with cloud platforms (e.g., AWS, Google Cloud).
• Leadership & impact :

Proven ability to lead scientific roadmaps across multiple product areas, aligning them with business objectives and a strong publication record in top-tier venues.

• Track record of solving real-world problems throughout the entire product lifecycle, from research to production.
• Visionary mindset :

A passion for driving scientific innovation to enhance personalized learning experiences.

• Strong collaboration skills and the ability to work cross-functionally with diverse teams.

Why you’ll love it at Preply :

• An open, collaborative, dynamic and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for your self-development;
• A competitive financial package with equity, leave allowance and health insurance;
• Not in Barcelona? We offer an attractive relocation package to join us in our Preply Barcelona Hub;
• Access to free mental health support platforms;
• Access to Gympass-partnered wellness and gym centers throughout Spain to promote and support well-being and physical health;
• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!).

Diversity, Equity, and Inclusion

Preply is committed to creating a diverse and inclusive environment where people from all backgrounds can thrive. Different opinions and viewpoints are key ingredients in our success as a multicultural Ed-Tech company.

Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status. Together, we are The World Class.

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