Sr AI Solution Engineer

CREATIVITY IS OUR SUPERPOWER. It’s our heritage and it’s also our future. Because we don’t just make toys. We create innovative products and experiences that inspire fans, entertain audiences and develop children through play. Mattel is at its best when every member of our team feels respected, included, and heard—when everyone can show up as themselves and do their best work every day. We value and share an infinite range of ideas and voices that evolve and broaden our perspectives with a reach that extends into all our brands, partners, and suppliers.

**Job Description** AI Solution Developer

Summary We are seeking a highly skilled AI Solution Developers with deep expertise in Foundation Models and Large Language Models (LLMs). The ideal candidate will have hands-on experience building, fine-tuning, evaluating, and deploying modern AI systems, including Retrieval-Augmented Generation (RAG) architectures and production-grade AI applications.

This role requires strong full-stack development capabilities combined with advanced AI knowledge to design scalable, secure, and high-performance AI-powered systems.

Key Responsibilities

• Design, develop, and deploy applications leveraging foundation models and LLMs (e.g., GPT-class models, open-source LLMs).
• Architect and implement Retrieval-Augmented Generation (RAG) systems using vector databases and semantic search.
• Fine-tune, evaluate, and optimize models for performance, cost, latency, and quality.
• Trained the model
• Setup Best practice and guardrail
• Develop prompt engineering strategies and build prompt pipelines.
• Build and maintain APIs and backend services for AI-driven applications.
• Implement guardrails, safety layers, and evaluation frameworks for AI systems.
• Work with structured and unstructured data pipelines.
• Collaborate with product, data, and engineering teams to integrate AI capabilities into products.
• Monitor, troubleshoot, and improve deployed AI systems in production.
• Run test cases on developed solutions.

Qualifications

• Education: Bachelor’s or Master’s degree in Computer Science, AI, Machine Learning, or related field (or equivalent experience).
• Experience: 4+ years in application/web development and creating advanced AI solutions and 2+ years working directly with LLM-based systems.
• Technical Skills:
• Experience with RAG, embeddings, semantic search, and vector databases
• Model fine-tuning techniques
• Experience with evaluation frameworks and model benchmarking.
• Knowledge of AI safety, alignment, and hallucination mitigation strategies.
• Strong proficiency in Python (required).
• Solid knowledge of SQL/NoSQL/PostgreSQL/MongoDB database design.
• Frontend skills: HTML, CSS, JavaScript (modern frameworks like React, Next.js preferred).
• Experience building RESTful APIs (FastAPI, Flask, Django).
• Experience with asynchronous programming and microservices architecture.
• Experience with vector databases.
• Cloud platforms (AWS, GCP, or Azure).
• CI/CD pipelines and DevOps practices.
• Soft Skills: Strong analytical mindset, eagerness to adopt emerging technologies, excellent communication, and the ability to work collaboratively in a fast-paced operations environment.

What Makes an Exceptional Candidate

• Has built end-to-end LLM products from concept to deployment.
• Understands trade-offs between open-source and hosted model APIs.
• Thinks in systems: latency, cost optimization, scalability.
• Strong problem-solving and experimentation mindset.
• Stays current with rapidly evolving AI research and tooling.

**Qualifications** What We’re Looking For:

• Demonstrated a growth mindset by staying curious and continuously learning, embracing challenges, and improving themselves.

**Additional Information** Don’t meet every single requirement? At Mattel, we are dedicated to an inclusive workplace and a culture of belonging. If you’re excited about this role but your past experience doesn’t align perfectly with every qualification in the job description, we still encourage you to apply. You may be just the right candidate for this or other roles.

How We Work: We are a purpose driven company aiming to empower generations to explore the wonder of childhood and reach their full potential. We live up to our purpose employing the following behaviors:

• We collaborate: Being a part of Mattel means being part of one team with shared values and comm…