Backend Engineer

Rejoignez une startup IA en pleine croissance en tant que Backend Engineer. Vous serez responsable de la conception et de la mise en œuvre de systèmes critiques pour les professionnels du droit. Vous travaillerez en étroite collaboration avec l'équipe d'ingénierie pour concevoir des API, améliorer les performances et expédier de nouvelles fonctionnalités alimentées par l'IA.

• Concevoir et expédier des API REST propres et bien testées en utilisant FastAPI.
• Implémenter la logique métier pour le traitement des documents et les flux de données.
• Contribuer aux travaux en arrière-plan et aux pipelines asynchrones (Celery, Redis).

Licorne Society a été missioné par une startup IA en pleine croissance pour recruter leur Backend Engineer.
## About the Company
We’re building the **AI copilot for notaries and real-estate professionals**, automating complex legal workflows and document analysis.
Our platform combines **FastAPI**, **PostgreSQL**, **LLMs**, and **knowledge graphs** to reduce transaction times by over **80%**.
Having reached **early product-market fit**, we’re now scaling rapidly — expanding data pipelines, integrations, and AI-powered document logic.
You’ll join a small, focused engineering team at the moment when product architecture still shapes the company’s future.
## Role Overview
As **Backend Engineer**, you’ll build the core systems behind a high-trust, mission-critical product used daily by legal professionals.
You’ll work closely with our **Lead Backend Engineer, Lead Frontend Engineer and Lead LLM** **Engineer** to design APIs, improve performance, and ship new AI-driven features.
We iterate fast and value reliability, ownership, and clarity of thought.
## What You’ll Do

• Design and ship **clean, well-tested REST APIs** using FastAPI
• Implement **business logic** for document processing and data flows
• Design and optimize **PostgreSQL** schemas and queries (SQLAlchemy)
• Integrate with **third-party APIs** (Stripe, HubSpot, OCR/AI providers)
• Contribute to **background jobs and async pipelines** (Celery, Redis)
• Write **tests and CI pipelines** ensuring reliability at scale

## What We’re Looking For
**Core Technical Skills**

• 3–5 years of backend development with **Python**
• Solid experience with **FastAPI** (or Flask)
• Strong grounding in **PostgreSQL** and **SQLAlchemy**
• Skilled in **REST API design**, testing (pytest), and Git workflow
• Familiar with **Docker, Google Cloud Tasks**

**Bonus**

• Integrations with **Stripe**, **HubSpot**, **OCR**, or **AI APIs**
• Experience with **Azure** or **Google Cloud**
• Background in **document automation** or **legal tech**
• Understanding of **async programming** and performance tuning

**Mindset**

• You write **maintainable, production-ready code**
• You thrive in **fast feedback loops** and small teams
• You value **clarity, precision, and accountability**

## What You’ll Get

• **Impact:** Build the infrastructure behind a product handling real estate transactions worth millions.
• **Learning:** Collaborate with senior engineers working at the frontier of AI, data, and legal tech.
• **Ownership:** End-to-end responsibility on features that ship fast and matter.
• **Compensation:** Competitive salary + stock options.