Senior AI Engineer at lodgify

⭐ Who we are Lodgify is a fast-growing scale-up company leading the vacation rental industry. Backed by $30M in funding, our platform empowers property owners and managers worldwide to efficiently manage and grow their business through technology. Headquartered in sunny Barcelona, we're now a team of 380+ people representing over 60 nationalities, united by a passion for transforming the future of short-term rentals. ⭐ Role Overview We are seeking a Senior AI Engineer specializing in LLMs to lead the design, evaluation, and deployment of production-grade generative AI systems. In this role, you will own end-to-end LLM solutions, from prototyping to scalable production, while establishing best practices in evaluation, reliability, and responsible AI. ⭐ How will you make an impact? • Lead the design and development of LLM-powered applications (chatbots, copilots, agents, internal tools). • Own and evolve the LLM evaluation (evals) strategy, including designing gold-standard datasets and benchmarks, building automated eval pipelines and scoring systems and defining metrics for factuality, grounding, robustness, and user impact. • Diagnose and resolve complex failure modes (hallucinations, retrieval issues, agent breakdowns). • Optimize systems for latency, cost, scalability, and reliability in production. • Mentor junior engineers and guide best practices in LLM development and evaluation. • Collaborate cross-functionally with product, data, and leadership to shape AI strategy. • Set standards for responsible AI, including safety, bias mitigation, and observability. ⭐ What makes you a great fit? • 5+ years of experience in software engineering, machine learning, and applied AI with a track record of driving projects to completion. • Strong software engineering fundamentals (testing, modular design, dependency injection) in Python. • A track record of taking AI and LLM-powered features from initial concept through deployment and long-term production maintenance. • Experience implementing automated testing strategies for non-deterministic systems, and strong debugging and analytical skills for ambiguous model behavior. • A strong understanding of prompt engineering and prompt lifecycle management, RAG architectures and retrieval evaluation, and LLM limitations and failure patterns. • Solid experience in using Data Analytics techniques (SQL, analysis and visualizations) to inform Product decisions and delivery. • A heavy product mindset to deeply understand our product and our customer needs to design the right solutions for them. • Strong tech leadership and mentorship skills, and the ability to independently drive projects to completion. • Clear communication of trade-offs, risks, and system performance to stakeholders. 🚀 How can you earn extra bonus points? • Proven experience driving ambiguous projects to completion, mentoring teams, and communicating complex technical risks to stakeholders. • The ability to design robust, production-grade evaluation at scale using advanced metrics and statistical validation. • Deep expertise in model fine-tuning, adversarial red-teaming, and safety testing to protect the system from edge-case vulnerabilities. Why you’ll love us: You’ll be part of a growing, dynamic company with a truly international team. At Lodgify, we are full of contagious energy, hard work, and passion for what we do. We celebrate diversity and are proud to acknowledge a variety of backgrounds, perspectives and skills in our team; committed to creating a workplace where everyone is heard and feels a sense of belonging. What's in it for you?* 🏠 The freedom to work from home any day that works for you. 🌴 Enjoy 25 working days of paid vacation and Jornada Intensiva in August. 💊 Top-notch Cigna health insurance (includes travel insurance, dental plan, psychologist and we cover pre-existing conditions too). 😋 Save on meals! Enjoy a monthly allowance of 150€ and, in addition, a Flexible Remuneration plan with up to 70€. Plus, enjoy a 50% discount on Ametller’s prepared dishes to level up your mealtime! 🚇 Flexible Remuneration options for your transportation needs. 🖥️ Elevate your workspace. We provide a home-office setup allowance to ensure you have everything you need for a productive and comfortable work environment. 🇪🇸 Free Spanish classes. 🤑 Boost your earning potential with our referral program that offers paid compensation. 🌟 Fuel your day with a daily office breakfast buffet and join our monthly events like football tournaments, wine tastings, hikes, kayaking and more! 🎯 Work in a dynamic environment with offices fully equipped for fun with ping pong, foosball, surrounded by an international team of +60 nationalities. *Benefits offered may differ based on the type of contract that is issued So, what are you waiting for? Apply now! All applications and CVs must be submitted in English 😉