Lead Full-Stack Engineer (AI & Data Infrastructure) – First Engineering Hire

About this role

IMPORTANT: This is a high growth role we expect this role to turn into an executive role almost immediately post launch. This role will also receive significant equity in return.

About Semblur:

Semblur is building the category-defining AI document hygiene and cross cloud organization engine. We solve a universal, painful problem: individuals, teams, and enterprises are drowning in massive digital clutter across Google Drive, OneDrive, Dropbox, and local systems.

Unlike standard productivity tools, Semblur is an enterprise-grade semantic data orchestration platform. We have financial backing by an established firm and are launching with a built-in sandbox of 7 mid-market enterprise portfolio companies as Day 1 customers. Our distribution risk is zero; our focus is entirely on bulletproof engineering.

The Role:

We are looking for a product-minded, backend-heavy Full-Stack Engineer to own the development and execution of our core system architecture from day one. You will be building a secure, high-throughput semantic ingestion pipeline, designing a hybrid metadata/vector indexing engine, and constructing an approval-driven action execution layer.

This is an elite opportunity to serve as our first engineering hire, working directly with the founder to take Semblur from blueprint to enterprise deployment within a tight window.

Core Responsibilities:

To be discussed in interview.

What We Are Looking For

Architectural Mindset: You are an engineer, not just a feature developer. You care about system design, decoupling infrastructure layers, rate-limiting, and cost-optimizing LLM context windows.

Backend Expertise: Deep proficiency in Python, Node.js, and asynchronous job queues (Celery, RabbitMQ, or Redis).

Data Layer Mastery: Strong experience with relational databases (PostgreSQL) and embedding-based semantic search workflows.

Security First: Familiarity with modern data encryption (at rest and in transit), enterprise access controls, and cloud API safety pr...