Senior Software Development Engineer

Workday•Pleasanton, CA

7d•$160,100 - $285,100•Hybrid

About The Position

Workday is seeking a Senior Software Development Engineer to join the Developer Agent team. This team is focused on providing tools that make the Workday platform open, extensible, and AI-native. They aim to empower developers by allowing them to build using their preferred agentic tools, prompt through plain language, create applications and agents, and orchestrate complex workflows across the Workday stack. The team is backed by intelligent, context-aware AI agents that understand the platform deeply, enhancing how developers code, navigate, automate, troubleshoot, and ship. The goal is to create a development experience that is seamless and smart, enabling developers to build the next generation of agentic AI applications on the Open Workday ecosystem. This role involves working at the intersection of developer productivity, AI, and platform engineering, reimagining the developer platform and shaping how developers build on Workday's open platform.

Requirements

8+ years of software engineering experience, with demonstrated senior-level ownership of complex production systems.
8+ years of experience in JVM-based backend development (Java or Kotlin), with proficiency in the Spring Boot framework.
8+ years of proficiency in TypeScript/JavaScript, including experience with React.
5+ years developing RESTful APIs and manage complex third-party API integrations.
5+ years with hands-on experience deploying and operating production services in a cloud-native environment.
Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
Familiarity with large language model integration strategies, such as OpenAI-compatible APIs, data streaming, and tool/function calling.
Understanding of agentic architectures and the Model Context Protocol (MCP) as a producer or consumer.
Hands on experience with AI coding agents such as Cursor, Claude Code, Windsurf, or Cline.
Comfortable implementing real-time streaming (SSE/WebSockets) and OpenAI-compatible endpoints.
Proficiency in modern frontend technologies including React, HTML, and CSS to deliver high-quality developer-facing interfaces.
A strong commitment to testing methodologies using frameworks like Jest, React Testing Library, JUnit, Cypress, & similar.
Capability of authoring stable, reliable tests for asynchronous logic and multi-turn AI interaction patterns.
Background in application observability, including error tracking, metrics instrumentation, and product analytics.
Familiarity with managing CI/CD workflows via GitHub Actions, Jenkins, or other cloud deployment pipelines, and extension publishing environments like the VS Code Marketplace.

Nice To Haves

Familiarity with LangChain or comparable LLM orchestration frameworks
Hands-on experience with cloud development technologies and platforms (AWS, Kubernetes, Helm) is a plus

Responsibilities

Design and build core platform capabilities that advance Workday toward more AI powered agentic developer experiences and workflows.
Deliver high-impact technical work.
Contribute to architecture and API/SDK design.
Collaborate across product and engineering teams to ship reliable, scalable services and tools consumed by external developers.
Collaborate closely with principal engineers, product managers, and cross-functional teams to translate high level requirements into well-scoped, executable engineering work.
Uphold API governance and engineering best practices within your team, including versioning, backward compatibility, and security standards for public-facing surfaces.
Mentor junior and mid-level engineers through code review, design feedback, and pairing, and help raise the technical bar on the team.
Participate in architectural discussions and contribute to build-vs-integrate decisions for platform components, with grounding in real-world tradeoffs of scale and maintainability.
Write clear technical documentation for your features and contribute to internal engineering knowledge bases.