Senior Software Engineer API Platform (PythonTypescript)

Your work days are brighter here.

Were 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 were shaping the future of work so teams can reach their potential and focus on what matters most. The minute you join youll 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. Were 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 youre building smarter solutions supporting customers or creating a space where everyone belongs youll do meaningful work with Workmates whove got your return well 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 youve found a match in Workday and we hope to be a match for you too.

About the Team

About the Role

As a Senior Software Development Engineer in Product Engineering you will be a technical leader in designing and delivering highthroughput lowlatency APIs and frameworks that support Workdays 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 crossorg 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 youll do

• Lead endtoend 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 missioncritical 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 oncall and incident response processes; own root cause analysis and longterm remediation for significant issues.

• Act as a trusted technical partner to teams across Product Engineering helping them make API and integration decisions.

About You

Basic Qualifications

• 8 years of experience designing and building largescale missioncritical backend systems.

• 5 years of handson experience with TypeScript or Python and strong OO/functional design skills.

• 4 years of experience building and operating web service APIs (REST/SOAP/GraphQL) at scale.

• Demonstrated experience owning complex features or systems from design through production.

Other Qualifications

• Comfort using AIassisted code generation tools (such as Cursor Claude Code GitHub Copilot) as part of the daytoday development workflow.

• Deep understanding of distributed systems: concurrency multithreading consistency fault tolerance and performance tuning.

• Strong experience with API design and lifecycle: OpenAPI/Swagger versioning strategies backward compatibility contract testing and documentation.

• Experience with API gateway or edge patterns (routing authentication/authorization throttling rate limiting transformation multitenant concerns).

• Handson experience with observability stacks (metrics tracing logging) and using them to improve latency and reliability.

• Familiarity with GraphQL and dataoriented APIs; exposure to Data Cloud / analytical stores or MCPstyle agent integration patterns is a plus.

• Strong testing discipline (unit integration contract performance) and experience with modern testing and observability stacks such as JUnit ScalaTest Postman Mockito Jacoco/Scoverage.

• Experience with cloud and containerized environments (e.g. AWS Kubernetes) and CI/CD pipelines.

• Proven track record of mentoring engineers leading technical discussions and driving crossteam initiatives.

• Ability to translate product and AI/agent requirements into robust API and backend designs.

• Comfort working in ambiguous problem spaces with a bias for pragmatic iterative delivery.

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 Workdays comprehensive benefits please click here.

Our Approach to Flexible Work

With Flex Work were 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 youll 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. If you require assistance or an accommodation at any point please email .

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