Software Engineer - Agentic AI & API Platform

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 Workday customers use every day. Our teams design and deliver features 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 for agentic AI use cases. We are essentially building the "neural pathways" for Workday's next-generation applications — designing and scaling APIs that are optimized not only for human developers, but for AI agents to understand and act on autonomously. We partner closely with internal Workday teams to design APIs and patterns that are consistent, reliable, and easy to consume. We also act as a center of excellence for API governance, setting the standards that help the entire organization build with confidence. About the Role As a Software Development Engineer in Product Engineering, you will help build and maintain the APIs and backend services that sit on the critical path for Workday products and agentic experiences. You will work with technologies such as TypeScript/Python and Workday frameworks to develop scalable, resilient distributed systems and great internal developer experiences. Your work will directly impact how quickly Workday can build, deploy, and iterate on agent‑driven capabilities for customers. This role is crucial because agentic AI changes how APIs must be built. For an AI agent to successfully process an invoice, update an employee record, or orchestrate a complex workflow within Workday, the underlying APIs must be highly deterministic, self-describing, and resilient. You will be at the center of making that possible. What you’ll do: Design, develop, and maintain product APIs and backend services. Implement robust API behaviors including routing, validation, authentication/authorization, transformation, and error handling. Contribute to high‑throughput, low‑latency components and integrations, focusing on resiliency, scalability, and fault tolerance. Apply API contract and governance practices using OpenAPI/Swagger and internal standards. Build and improve frameworks and tooling used by Product Engineering teams to define, publish, and maintain APIs (REST, SOAP, Graph, etc.). Use observability (metrics, tracing, logging) to understand behavior in production and drive performance and reliability improvements. Write clean, well‑documented, and testable code; contribute unit, integration, and contract tests. Participate in design and code reviews; share knowledge through documentation, talks, and mentoring. Own small to medium services or API areas end‑to‑end — from design and implementation through rollout, monitoring, and support. Collaborate with partners in other Workday code service and agent development teams. About You Basic Qualifications 5+ years of experience in software engineering building scalable backend services or platforms. 3+ years of experience with TypeScript or Python in production environments 2+ years of experience with web service/API technologies (such as REST, SOAP, JSON, XML Schema, WSDL, GraphQL, etc) with an emphasis on contract-first design (OpenAI / Swagger) 2+ years of experience working with distributed systems architecture, handling high-throughput workloads, concurrency management, or advanced caching strategies Other Qualifications Demonstrated proficiency with modern AI‑assisted development tools (e.g., Cursor, Claude Code, GitHub Copilot) to accelerate high‑quality software delivery. Solid algorithmic thinking (e.g., hash maps, trees, graph traversal, caching strategies) applied to routing, query planning, or data transformation. Familiarity with distributed systems concepts: concurrency/multithreading, horizontal scaling, high availability, and fault tolerance. Understanding of typical API gateway responsibilities: routing, validation, authentication, throttling/rate limiting, transformation, and security policies. Experience with API specifications and lifecycle (OpenAPI/Swagger, versioning, documentation). Good understanding of testing methodologies (unit, integration, contract, performance) and tools such as JUnit, ScalaTest, Postman, Mockito, and coverage tools. Experience with source control and modern dev tooling (Git/GitHub, Gradle, CI, debugging, profiling). Exposure to cloud‑based development (e.g., AWS, Kubernetes) is a plus. Familiarity with MCP or similar integration models is a plus. Strong communication skills and a collaborative mindset; comfortable working with teams across time zones. Curiosity about agentic AI and interest in building APIs that power AI‑driven workflows. 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 . Primary Location Base Pay Range: €72,000 EUR - €108,000 EUR Ireland Our Approach to Flexible Work 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. At Workday, we are committed to providing an accessible and inclusive hiring experience where all candidates can fully demonstrate their skills. 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