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)

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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.

SaaS Platform Developer - Fully Remote

Job summary

Work model