Sr. Workday Integrations Architect (Workday)

Location: Hybrid, with presence in the San Francisco or San Jose office 4 days per week; the designated work-from-home day is Tuesday.

Annual salary: $206,000–$275,000.

Company

Lambda builds AI cloud infrastructure for AI researchers, enterprises, and hyperscalers, with a mission to make compute widely accessible.

What you will do

• Define and own the target-state Workday integration architecture, including patterns, standards, naming conventions, error handling, monitoring, reusable components, and tooling decisions.
• Lead Workday implementation integrations from design through build, testing, cutover, parallel testing, go-live, and hypercare.
• Design and execute the migration from Rippling to Workday, including historical data conversion, validation, cutover sequencing, and decommissioning legacy integrations.
• Build and maintain inbound and outbound integrations for recruiting, organizational data, compensation, benefits, payroll, tax filing, equity, identity, provisioning, analytics, and finance systems.
• Own payroll, accounting journal, and GL integrations with NetSuite and lead reconciliation across Workday, payroll providers, and the general ledger.
• Establish monitoring, alerting, retry logic, runbooks, on-call practices, compliance controls, release regression testing, documentation, and mentoring.

Requirements

• 10+ years of experience in HRIS, enterprise integration, or systems architecture, including at least 6+ years designing and building Workday integrations.
• Experience leading at least one full Workday HCM implementation through go-live, including payroll and benefits integrations.
• Expertise with EIB, Core Connectors, Workday Studio, Workday SOAP and REST Web Services, RaaS, custom reports, calculated fields, XSLT, XPath, and integration security including ISUs, ISSGs, OAuth, and API clients.
• Hands-on experience with an iPaaS or middleware platform and the ability to determine when to use it versus native Workday tooling.
• Experience building or supporting payroll, benefits carrier, 401(k), and tax filing integrations, with understanding of data timing and reconciliation challenges.
• Strong SQL and data modeling skills, with experience using JSON, XML, CSV, SFTP, APIs, and webhooks for data transport and validation.
• Experience in a SOX or audit-facing environment, including change control, access reviews, evidence capture, and protection of sensitive employee and compensation data.
• Ability to design for failure, test thoroughly, document implementations, and validate changes before production release.
• Ability to collaborate across People, Finance, Payroll, IT, Security, and Engineering, explain technical tradeoffs, and operate effectively in a fast-growing pre-IPO environment.

Nice to have

• Workday Pro certification in Integrations, Studio, Payroll, or HCM.
• Experience migrating from Rippling or another all-in-one HR/payroll platform to Workday.
• Experience with international payroll providers such as ADP Celergo, CloudPay, Papaya Global, or Deel, and employer-of-record arrangements.
• Familiarity with NetSuite, Okta, Lumos, Workato, and BigQuery.
• IPO readiness experience, including integration control design and equity compensation data flows.
• Experience using AI tooling for integration testing, documentation, mapping, or reconciliation.
• Familiarity with Workday Orchestrate, Prism Analytics, or Extend.

Culture & Benefits

• Full-time employment at a fast-growing company founded in 2012 with more than 500 employees.
• Cash and equity compensation.
• Health, dental, and vision coverage for employees and dependents.
• Wellness and commuter stipends for select roles.
• 401(k) plan with a 2% company match for USA employees.
• Flexible paid time off plan.