Sr Software Engineer – API Platform & Agentic AI (Python/Typescript)

Workday · USA, CA, Pleasanton

onsitefull-time6-10 years

posted 15 Jul

Your work days are brighter here. We’re obsessed with making hard work pay off, for our people, our customers, and the world around us. As a Fortune 500 company and a leading AI platform for managing people, money, and agents, we’re shaping the future of work so teams can reach their potential and focus on what matters most. The minute you join, you’ll feel it. Not just in the products we build, but in how we show up for each other. Our culture is rooted in integrity, empathy, and shared enthusiasm. We’re in this together, tackling big challenges with bold ideas and genuine care. We look for curious minds and courageous collaborators who bring sun-drenched optimism and drive. Whether you're building smarter solutions, supporting customers, or creating a space where everyone belongs, you’ll do meaningful work with Workmates who’ve got your back. In return, we’ll give you the trust to take risks, the tools to grow, the skills to develop and the support of a company invested in you for the long haul. So, if you want to inspire a brighter work day for everyone, including yourself, you’ve found a match in Workday, and we hope to be a match for you too. About the Team The Product Engineering organization builds the product experiences that customers use every day. Our teams design and deliver features that sit on top of Workday’s core platforms and services, and increasingly depend on powerful, well designed APIs to support agentic experiences and AI driven scenarios. This team focuses on evolving the API surface and supporting mission critical product flows used by Product Engineering for agentic AI use cases. We partner closely with internal Workday teams to design APIs and patterns that are consistent, reliable, and easy to consume. You will shape the API foundation, architecture and operating model that makes it easy for Product Engineering to build agent ready, high quality APIs. If you enjoy building APIs that other engineers and AI agents love to use, you’ll feel at home on this team. About the Role As a Senior Software Development Engineer in Product Engineering, you will be a technical leader in designing and delivering high‑throughput, low‑latency APIs and frameworks that support Workday's next generation of products and agents. You will shape API design, drive performance and observability improvements, and coach and grow future senior engineers across the team. You will: Lead design and implementation of APIs and platform features used by Product Engineering teams. Champion consistent API standards, patterns, and tooling that align with cross‑org guidance while solving concrete product needs. Help Product Engineering teams expose capabilities via REST, GraphQL, and emerging integration patterns in a way that is friendly to agents and external consumers. What you’ll do Lead end‑to‑end design and development of complex backend services and APIs. Drive consensus with product managers, architects, and partner teams to define clear, evolvable API contracts and data models, using OpenAPI and internal standards. Drive performance and scalability improvements, including latency optimization, capacity planning, and resiliency strategies for mission‑critical product flows. Design and implement observability for product APIs (metrics, tracing, structured logging), and use data to drive technical decisions and SLOs. Collaborate on frameworks, tools, and patterns that make it simpler for other Product Engineering teams to define, publish, and maintain APIs. Work with data platform teams to define patterns for exposing data safely and efficiently to API and agent workflows. Provide technical leadership through design reviews, RFCs, spike investigations, and coaching junior engineers. Participate in and improve on‑call and incident response processes; own root cause analysis and long‑term remediation for significant issues. Act as a trusted technical partner to teams across Product Engineering, helping them make API and integration dec