Senior API Engineer

Senior API Engineer

Crusoe

Software Engineering San Francisco, CA, USA USD 165k-200k / year + Equity Posted on Apr 4, 2026 Apply now Crusoe is on a mission to accelerate the abundance of energy and intelligence. As the only vertically integrated AI infrastructure company built from the ground up, we own and operate each layer of the stack — from electrons to tokens — to power the world's most ambitious AI workloads. When you join Crusoe, you join a team that is building the future, faster.

We're in the midst of the greatest industrial revolution of our time. The demand for AI compute is boundless, and power is a bottleneck. We're solving that — with an energy-first approach that makes AI infrastructure better for the world and faster for the people innovating with AI.

We're looking for problem-solving, opportunity-finding teammates with a sense of urgency, who believe in the scale of our ambition and thrive on a path not fully paved — people who want to grow their careers alongside a team of experts across energy, manufacturing, data center construction, and cloud services.

If you want to do the most meaningful work of your career, help our customers and partners advance their AI strategies, and be part of a high-performing team that believes in each other, come build with us at Crusoe.

About This Role

We’re seeking a Senior API Integration Engineer to serve as a strategic technical partner driving enterprise-wide digital transformation through intelligent automation and scalable system integrations. This role will lead the design and delivery of mission-critical integrations across our People Tech ecosystem, with a strong emphasis on Workday HCM, while setting integration standards, mentoring engineers, and partnering closely with business leaders to modernize workflows at scale.

What You’ll Be Working On

Architecting and building enterprise-grade integrations using the Workato ONE platform to enable intelligent workflow automation Designing, developing, and maintaining deep API integrations across Workday HCM and the broader People Tech stack (payroll, ATS, LMS, compensation, benefits, performance, analytics) Leveraging AI-powered automation within Workato to improve efficiency, resiliency, and predictive process optimization Establishing reusable integration architecture patterns, frameworks, and governance standards that scale across both human-led and automated workflows Partnering with business and IT stakeholders to gather requirements, lead discovery sessions, assess ROI, and translate complex needs into scalable technical solutions Leading integration initiatives end-to-end, from concept through deployment, including sprint execution, technical reviews, and delivery accountability Providing senior-level escalation support, ensuring reliability, monitoring, alerting, and incident response for critical integrations

What You’ll Bring to the Team

7+ years of experience as an API Developer or Integration Engineer in enterprise environments 3+ years of hands-on production experience with Workato, ideally with Workato ONE Deep expertise building and operating complex Workato recipes, including error handling, monitoring, batch processing, custom connectors, SDK development, and API collections Interest in and exposure to AI-assisted development workflows and intelligent automation — you don't need to be an expert, but you should be excited about where integration engineering is heading Collaborating with internal software engineering teams to ensure integration patterns and API access are available for custom-built internal tools and automations Proven experience integrating Workday HCM (Core HCM, Recruiting, Talent, Compensation, Time, Absence, Benefits) Strong background integrating People Tech platforms across payroll, ATS, LMS, compensation, performance, and benefits systems Expert knowledge of enterprise integration best practices, EAI/SOA patterns, and iPaaS architectures Proficiency with RESTful APIs, webhooks, JSON/XML, OAuth 2.0, SAML, SOAP, RBAC, and API security best practices Experience with Agile/Scrum delivery, Jira/JSM, Confluence, and CI/CD workflows Strong understanding of HR data models, compliance requirements (e.g., GDPR, SOC 2), and secure handling of sensitive PII

Bonus Points

Workato Foundations or Integration Developer certifications Workday certifications or experience with Workday Studio, EIB, and Web Services Experience with additional iPaaS platforms (e.g., MuleSoft, Boomi, Informatica) Background in HR technology consulting or HRIS implementations Experience with cloud platforms (AWS, Azure, GCP), IaC tools, or identity and SSO integrations Experience in high-growth or highly regulated environments

Benefits

Competitive compensation Restricted Stock Units Paid time off & paid holidays Comprehensive health, dental & vision insurance Employer contributions to HSA account Paid parental leave Paid life insurance, short-term and long-term disability Professional development & tuition reimbursement Mental health & wellness support Commuter benefits (parking & transit) Cell phone stipend 401(k) Retirement plan with company match up to 4% of salary Volunteer time off

Compensation Range

Compensation will be paid in the range of up to $165,000 - $200,000 + Bonus. Restricted Stock Units are included in all offers. Compensation to be determined by the applicants knowledge, education, and abilities, as well as internal equity and alignment with market data.

Crusoe is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, disability, genetic information, pregnancy, citizenship, marital status, sex/gender, sexual preference/ orientation, gender identity, age, veteran status, national origin, or any other status protected by law or regulation. Apply now See more open positions at Crusoe