This job is no longer available
This job expired on 25/08/2026. It no longer accepts applications.
Backend Engineer – AI‑powered Legal Tech
Leonar · Paris
Job description
About the role
We are looking for a Backend Engineer to help build the core infrastructure of an AI‑driven platform that automates legal workflows for notaries and real‑estate professionals. You will work in a small, high‑trust engineering team that is shaping the product architecture as the company scales.
Key responsibilities
- Design, develop, and maintain clean, well‑tested REST APIs using FastAPI.
- Implement business logic for document processing, data flows, and AI‑driven features.
- Design and optimise PostgreSQL schemas and queries with SQLAlchemy.
- Integrate third‑party services such as Stripe, HubSpot, OCR and other AI providers.
- Develop background jobs and asynchronous pipelines using Celery and Redis.
- Write unit and integration tests, set up CI pipelines, and ensure reliability at scale.
Required profile
- 3–5 years of professional backend development experience with Python.
- Strong understanding of REST API design and testing practices.
- Experience working in fast‑feedback, small‑team environments.
- Ability to write maintainable, production‑ready code and take ownership of features.
Required skills
- Python
- FastAPI (or Flask)
- PostgreSQL
- SQLAlchemy
- REST API design
- pytest
- Git workflow
- Docker
- Google Cloud Tasks
- Stripe integration
- HubSpot integration
- OCR / AI API integration
- Azure or Google Cloud platforms
- Celery
- Redis
- Async programming
- Performance tuning
What we offer
- Impactful work on a product handling multi‑million‑dollar real‑estate transactions.
- Opportunity to collaborate with senior engineers at the intersection of AI, data, and legal tech.
- End‑to‑end ownership of fast‑shipped features.
- Competitive salary and stock options.
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Leonar
Paris
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