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.

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. 

What We’re Looking For: 

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

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 common goals. Every person counts and working closely together always brings better results. Partnership is our process and our collective capabilities is our superpower.
• We innovate: At Mattel we always aim to find new and better ways to create innovative products and experiences. No matter where you work in the organization, you can always make a difference and have real impact. We welcome new ideas and value new initiatives that challenge conventional thinking.
• We execute: We are a performance-driven company. We strive for excellence and are focused on pursuing best-in-class outcomes. We believe in accountability and ownership and know that our people are at their best when they are empowered to create and deliver results.

Our Approach to Flexible Work:
We embrace a flexible work model designed to empower a culture of growth, optimism, and wellbeing, where every employee can reach their full potential. Combining purposeful in-person collaboration with flexibility, our focus is to optimize performance and drive connection for moments that matter.

Who We Are:
Mattel is a leading global toy and family entertainment company and owner of one of the most iconic brand portfolios in the world. We engage consumers and fans through our franchise brands, including Barbie, Hot Wheels, Fisher-Price, American Girl, Thomas & Friends, UNO, Masters of the Universe, Matchbox, Monster High, MEGA and Polly Pocket, as well as other popular properties that we own or license in partnership with global entertainment companies. Our offerings include toys, content, consumer products, digital and live experiences. Our products are sold in collaboration with the world’s leading retail and ecommerce companies. Since its founding in 1945, Mattel is proud to be a trusted partner in empowering generations to explore the wonder of childhood and reach their full potential.

Mattel’s award-winning workplace culture has been recognized by Forbes, Fast Company, Newsweek, Great Place to Work, TIME, and more.

Visit us at https://jobs.mattel.com/ and www.instagram.com/MattelCareers.

Mattel is an Equal Opportunity Employer where we want you to bring your authentic self to work every day. We welcome all job seekers, and all applicants will receive consideration for employment.

Videos to watch:
The Culture at Mattel
Corporate Philanthropy