Overview

As a Computational Linguist (CL) / Prompt Engineer (PE) at Preply, your primary responsibility will be crafting, refining, and testing prompts designed to elicit high-quality insights from LLMs regarding how students learn languages. You will support our AI-driven educational platform by designing datasets and validation pipelines essential for prompt effectiveness.

We power people's progress. 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.

Responsibilities

• Write, evaluate and optimize prompts for LLMs specifically targeted at analyzing language learning processes
• Understand and employ prompt engineering techniques such as few-shot prompting, chain-of-thought, and contextual framing (zero-shot, few-shot, etc.)
• Develop and maintain datasets for prompt validation, including designing annotation guidelines, performing quality control, and generating synthetic or crowdsourced data
• Validate prompt outputs through both qualitative and quantitative evaluation procedures
• Use Python for automated prompt testing and quality validation
• Collaborate with engineers, product managers, and learning designers to improve prompt performance
• Stay informed of best practices in prompt engineering and advances in NLP and LLM research

Qualifications

• Strong understanding of prompt engineering principles and experience with prompting LLMs
• 2-3 years of experience in a similar role as a Computational Linguist or Prompt Engineer
• Proficiency in Python scripting and familiarity with dataset creation and validation processes
• Strong understanding of datasets, annotation workflows, and quality control in AI contexts
• Analytical mindset and attention to detail, with a collaborative team spirit
• Comfortable working in agile, cross-functional environments and handling multiple tasks efficiently
• Enthusiasm for AI in education and motivation to shape Preply\'s next-gen learning tools
• Bachelor\'s degree or higher in linguistics, English or Spanish
• Excellent command of English (spoken and written) and linguistic precision

Benefits and Our 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!)

Commitment to 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.