Full Stack Engineer - FastAPI / React.js

Description :

We are seeking a Fullstack Engineer who can deeply understand and reconstruct complex product experiences from UI structure and user workflows to backend APIs, data modelling, and system behaviour.

In this role, youll replicate production-grade SaaS platforms and integrate them with backend systems and AI agents.

Youll work in a small, fast-moving team to build interfaces and workflows that look and feel like real products but operate on synthetic or proxy data models.

This is a high-impact, high-ownership role with rapid iteration cycles, ideal for engineers who thrive on autonomy, clear communication, and structured reasoning.

Responsibilities :

• Develop end-to-end product workflows (e.g., expenses, reimbursements, billing, and organizational management).
• Build React-based frontends using clean, maintainable TypeScript (TSX) component systems.
• Design and implement backend services, including :

1. RESTful APIs.

2. Session management and authentication flows.

3. Database schema design and migrations (PostgreSQL preferred).

4. Service wiring, state handling, and data modeling.

1. Expense and reimbursement lifecycle systems.

2. Virtual card creation and request flows.

3. Employee and organization management dashboards.

Qualifications :

1. TypeScript and React (or equivalent frontend frameworks).

2. FastAPI (or equivalent backend frameworks).

3. SQL / PostgreSQL (or equivalent database technologies).

1. HTTP / REST APIs.

2. Database schemas and migrations.

3. Server routing, session management, and authentication.

(ref : hirist.tech)