Staff Machine Learning Engineer
Cresta is seeking a Staff Machine Learning Engineer to join their team in the United States. As a leader in AI-driven customer experience solutions, Cresta's platform integrates conversational AI agents, real-time human agent augmentation, and comprehensive conversation intelligence to enhance customer interactions. The company serves prominent clients such as United Airlines, Cox Communications, and Marriott, aiming to revolutionize customer engagement through advanced AI technologies.
In this role, the Staff Machine Learning Engineer will be responsible for defining and leading the technical vision for Cresta's next-generation Agentic AI systems, including Agentic Assist and enterprise AI Agents. The engineer will architect scalable, production-grade LLM systems that integrate reasoning, retrieval, planning, tool use, and real-time decision-making into cohesive, intelligent workflows. Additionally, the role involves designing and evolving multi-agent orchestration frameworks that combine Retrieval-Augmented Generation (RAG), structured knowledge, domain-adapted models, and automated actions.
Candidates should possess a Bachelor's degree in Computer Science, Mathematics, or a related field; a Master's or Ph.D. is strongly preferred. A minimum of 7 years of experience in building and deploying machine learning systems in production is required, with deep hands-on experience with large language models (LLMs) at scale. Demonstrated leadership in architecting complex AI systems, particularly agentic or multi-step LLM workflows, is essential. Expertise in transformer-based models, embeddings, retrieval systems, and RAG pipelines is highly valued. Strong systems thinking, with the ability to design for scalability, latency constraints, cost efficiency, security, and long-term maintainability, is crucial. Extensive experience with modern ML frameworks such as PyTorch, TensorFlow, or Hugging Face, and distributed/cloud-based infrastructure is also necessary.
While specific compensation details are not provided, Cresta offers a competitive salary and benefits package. Employees can expect comprehensive health benefits, including medical, vision, and dental coverage, as well as financial benefits such as 401(k) plans and company-paid life insurance. Additional perks may include paid time off, parental leave, family care leave, and other benefits designed to support employee well-being.
Cresta fosters a collaborative and innovative company culture, emphasizing the development of cutting-edge AI solutions that redefine customer experiences. The company provides opportunities for professional growth and advancement, encouraging employees to contribute to impactful projects that shape the future of AI in customer service. Joining Cresta offers the chance to work alongside leading experts in the field and to make a significant impact on the evolution of AI-driven customer engagement.