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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior AI Engineer - Sana - **Company:** Workday, Inc. - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Artificial Neural Networks, Distributed Systems, PostgreSQL, Open Source Technology, Redis, OpenAI, Service-Oriented Architecture, Software Engineering, TypeScript, AI Infrastructure, Large Language Models, Prompt Engineering, Caching, Generative AI, Backend, Langfuse — LLM Observability and Analytics Platform, Agentic-AI, Gaussian, LangSmith, Kubernetes, Machine Learning Operations, Human in the Loop, Workday - **Published:** September 30, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9205878/senior-ai-engineer-sana ## About the Role 3+ years of software engineering experience building production backend or platform systems. * 3+ years of experience in TypeScript, with a strong track record of writing reliable, maintainable services. * 3+ years of experience with distributed systems, APIs, asynchronous workflows, and service-oriented architecture. * 3+ years of experience designing systems with a focus on scalability, reliability, observability, and maintainability., Experience building agent platforms or AI infrastructure. * Deep understanding of the low-level details of the OpenAI, Google, and Anthropic LLM APIs, including tool calling, system prompt caching, etc. * Familiarity with LLM application patterns, including tool calling, retrieval-augmented generation (RAG), memory and context management, multi-step orchestration, and human-in-the-loop systems. * Experience building and running machine learning systems in production, including compiling training and test datasets, building training pipelines, evaluating models, and detecting and handling drift (neural networks, Gaussian models, Thompson sampling, etc.). * Experience designing evaluation frameworks for LLM or agent quality and safety, including hands-on use of platforms such as Langfuse or LangSmith. * Familiarity with vector databases, prompt and context engineering, and experimentation tooling. * Experience working with sandbox environments such as Modal, and designing strict access control models to keep user data safe and encrypted at all times. * Experience running services in Kubernetes-based environments on GCP or equivalent cloud platforms. * Comfort working with Postgres and Redis in high-throughput, low-latency service contexts. * Contributions to open source TypeScript projects. * Ability to navigate ambiguity, make strong technical tradeoffs, and drive projects from concept to production. * Strong communication and collaboration skills, with the ability to partner effectively across engineering, product, and AI research teams. Workday Pay Transparency Statement (For EU Locations Only), Listed below is the base salary range applicable to this position. Workday pay ranges (and the precise pay offered to the successful candidate) are based on a number of objective criteria such as relevant experience and skills, and educational qualifications, level of responsibility, demands of the role, work location and business need. As a part of the total compensation package, this role may be eligible for the Workday Bonus Plan or a role-specific commission/bonus, as well as annual refresh stock grants awarded by Workday Inc. For more information regarding Workday's comprehensive benefits, please click here. ## Description You'll build the core agent infrastructure that powers Sana's mission to bring superintelligence to work. This is a greenfield opportunity to define how AI agents plan, reason, and execute across enterprise environments-building systems that reliably handle real-world complexity at scale. You'll work at the intersection of agent architecture, context-, tool- and prompt engineering, and production infrastructure., With Flex Work, we're combining the best of both worlds: in-person time and remote. Our approach enables our teams to deepen connections, maintain a strong community, and do their best work. We know that flexibility can take shape in many ways, so rather than a number of required days in-office each week, we simply spend at least half (50%) of our time each quarter in the office or in the field with our customers, prospects, and partners (depending on role). This means you'll have the freedom to create a flexible schedule that caters to your business, team, and personal needs, while being intentional to make the most of time spent together. Those in our remote "home office" roles also have the opportunity to come together in our offices for important moments that matter. Pursuant to applicable Fair Chance law, Workday will consider for employment qualified applicants with arrest and conviction records. Workday is an Equal Opportunity Employer including individuals with disabilities and protected veterans. Workday is committed to providing reasonable accommodations for qualified individuals during our application process, in order to perform one or more essential functions of their job, as well as regarding the use of AI tools for employment decision-making to any degree. Please see below for more details including how to request an accommodation as a qualified veteran, due to a disability or for religious reasons, or as otherwise provided under applicable law. Workday prohibits taking adverse action against any candidate or employee for reporting a possible violation of this policy, requesting one or more work accommodation, exercising a privacy right, or cooperating in an investigation in accordance with applicable law. Any employee who retaliates against a candidate or employee for doing so may be subject to disciplinary action, up to and including termination of employment, to the fullest extent allowable under applicable law.