Senior Full-Stack Engineer – Platform (IAM & Permissions)

About the role

Our Engineering and Product Design teams are building multiple verticals on our platform at high speed, leveraging AI and agentic functionality. As we scale into the world’s largest regulated financial institutions, identity and access management (IAM), authorization, and fine‑grained permissions have become foundational to our enterprise readiness.

Key responsibilities

• Design, build, and operate core authorization primitives such as roles, policies, and fine‑grained permission checks (RBAC/ReBAC), together with authentication and SSO/OAuth/OIDC flows.
• Guarantee strict multi‑tenant isolation so each customer’s data and decisions remain fully segregated.
• Keep permission checks fast in the hot path of millions of automated decisions per day, where latency and correctness are non‑negotiable.
• Build audit and access‑trail capabilities that provide a verifiable record of who accessed what, when, and why.
• Design for regulated‑industry constraints (financial services, SOC 2 / ISO 27001, data residency) to meet compliance requirements.
• Leverage cutting‑edge AI tools (e.g., Claude) daily to create industry‑shaping AI‑native capabilities.

Required profile

• 5+ years of professional full‑stack experience building backend services in Python (FastAPI or equivalent), including REST APIs and databases.
• Strong proficiency with React and TypeScript.
• Experience building access‑control systems and familiarity with authentication and authorization concepts such as RBAC, SSO, OAuth/OIDC, and multi‑tenant permissions.
• Solid engineering fundamentals with a focus on simplicity and precision.
• Experience integrating with AWS or similar cloud providers.
• Fluent English, both written and spoken, essential for a remote work environment.

Required skills

• Python
• FastAPI
• React
• TypeScript
• AWS
• OAuth / OIDC
• RBAC / ReBAC
• SSO
• Multi‑tenant architecture
• SQL / NoSQL databases (e.g., DynamoDB, PostgreSQL, SQLAlchemy)

What we offer

• Top‑of‑market equity and cash compensation package.
• Self‑development budget for conferences, books, or courses.
• Apple MacBook Pro and a meaningful home‑office setup.
• Flat hierarchy with direct communication with founding team members.
• Mentorship from experienced engineers and exposure to leading tech investors and advisors.