Firebase

GraphQL

Hasura

Supabase

Gatsby

React (next.js)

Nuxt.js

Next.js

### Role Overview

We are in search of a highly skilled **Senior Full-Stack Engineer** to advance a fully specified, largely pre-built multi-tenant B2B SaaS application through its final stages of integration, security hardening, testing, and production deployment. This role is critical in ensuring the application's integrity and security, particularly focusing on **Supabase Row-Level Security (RLS)** to maintain strict tenant-level data isolation.

#### Responsibilities

- Integrate and enhance an existing **Next.js 14 + TypeScript** application for a robust production environment.
- Design, implement, and rigorously test **Supabase Row-Level Security (RLS)** policies to ensure secure multi-tenant data segregation.
- Conduct comprehensive testing of RLS policies to prevent unauthorized cross-tenant data access.
- Develop and maintain authentication, organizational access, roles, and permissions.
- Collaborate extensively with **Supabase/PostgreSQL** for database management, including real-time subscriptions.
- Integrate third-party APIs and manage production webhook workflows for various external services.
- Develop server-side API routes and application logic using Next.js.
- Implement scheduled and cron-based workflows in a serverless or edge environment.
- Support real-time collaboration and messaging using Supabase subscriptions.
- Integrate AI-powered functionalities using LLM APIs.
- Ensure secure handling of API keys, credentials, and secrets through environment variables.
- Deliver responsive applications optimized for both desktop and mobile platforms.
- Execute deployment of builds and production environments using Vercel.
- Conduct thorough QA, performance reviews, security hardening, and production-readiness testing.
- Maintain a disciplined GitHub commit history and thrive in an async-first work environment.

#### Required Skills

- Extensive production experience with **Next.js and TypeScript**, including server-side API development.
- Proven expertise with **Supabase and PostgreSQL**.
- Demonstrated success in implementing **Supabase Row-Level Security (RLS)** for secure multi-tenant data management.
- Experience in developing **multi-tenant SaaS applications** with complex access models.
- Proficiency in integrating third-party APIs and managing production webhooks.
- Experience with serverless or edge environment scheduled tasks.
- Strong grasp of backend security, authorization, and secure secret management.
- Ability to adhere to detailed specifications and execute precise requirements.
- Excellent written communication skills in English and the ability to work independently.

#### Nice to Have

- Experience with **LLM API integration** using Anthropic or OpenAI.
- Familiarity with **Stripe** for payment processing.
- Experience with e-signature platforms like **DocuSign**.
- Knowledge of email platforms such as **Resend**.
- Experience with notification tools like **Knock or Novu**.
- Familiarity with SMS platforms such as **Twilio**.
- Understanding of email deliverability standards, including **SPF, DKIM, and DMARC**.
- Experience with deploying applications on **Vercel**.


Juliana Torrisi

SaaS

Productionizing llm applications

Sr Full-Stack Engineer — Next.js, Supabase & Row-Level Security (RLS) (FT-NA)