SaaS Platform Developer - Fully Remote

About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D’Angelo , Larry Summers , and Jack Dorsey .

Position: Senior Full-Stack Engineer, Multi-Tenant SaaS Platforms

Type: Contract Compensation: $75–$95/hour Location: Remote Role Responsibilities

• Lead architecture decisions across frontend, backend, data, and infrastructure for a multi-tenant SaaS product. Balance configurability with maintainability.
• Build admin-managed configuration for fee models, reporting periods, escalation rules, and integrations. Ensure no code changes are required per tenant.
• Design and maintain RBAC across distinct user populations with separate permission matrices per portal.
• Develop fee calculation engines supporting percentage, flat, capped, and tiered models. Deliver audit-ready exports at penny-level precision.
• Implement payment lifecycle tracking, cash reconciliation, and exception handling against external payment systems.
• Integrate payment processors, procurement ERPs, CRM systems, and notification services into a cohesive platform.

Qualifications Must-Have

• 5+ years of professional full-stack engineering experience.
• 2+ years as a lead or sole developer on a production SaaS product.
• Experience building multi-tenant SaaS with tenant-level configurability.
• Developed role-based access control spanning internal operators, vendors, and customers.
• Built fee calculation engines and payment lifecycle tracking.
• Integrated payment processors, procurement ERPs, and CRM systems.
• Strong written and verbal communication skills.

Preferred

• Experience with government procurement or regulated financial compliance.
• Familiarity with government payment gateways.
• BI embedding experience with row-level data isolation across tenants.
• Experience exposing platform functionality through a typed SDK or API.

Application Process (Takes 20–30 mins to complete)

• Upload resume
• AI interview based on your resume
• Submit form

Resources & Support

• For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome
• For any help or support, reach out to: [email protected]

PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.