Sr. Backend Engineer

About Lucio: 

We're an AI product company that wants to transform the legal industry using generative AI. We're a rapidly growing team with a truly innovative product that is already being used at many top law firms in the country.

We're building a team of talented developers who are passionate about building products that solve real-world problems. At Lucio, you'll work on powerful AI-driven products—whether it’s fine-tuning large language models (LLMs), creating robust data processing pipelines, or scaling distributed services.

We're looking for a Backend Engineer who:

• Has solid experience with Python (Celery, Flask, Gevent, Tesseract, PyTorch).

• Has built performant and scalable backend systems.

• Is comfortable working on distributed applications and asynchronous task queues.

• Has exposure to OCR tools, document processing, or integrating LLMs.

• Has worked (or is eager to work) on generative AI products.

• Has basic familiarity with Node.js & JavaScript (preferred, not mandatory).

• Understands fundamentals of Generative AI or Machine Learning.

Responsibilities:

• Design, build, and maintain efficient, scalable, and reliable backend systems.

• Collaborate with AI researchers and product teams to integrate ML/LLM models.

• Work closely with frontend developers, DevOps, QA engineers, product managers, and the design team to deliver cohesive, high-quality features.

• Optimize infrastructure for performance, scalability, and cost.

• Write clean, maintainable, and testable code with proper documentation.

• Solve real-world challenges in processing and managing legal documents.

• Participate in code reviews and contribute to continuous improvement.

Who You Are:

• You have 5+ years of experience building backend systems.

• You’ve worked on independent projects or in fast-paced product teams.

• You’re passionate about clean architecture, scalability, and AI-driven innovation.

• You thrive in a startup environment and take ownership of your work.

• A CS degree is not a must—skillset and mindset matter more.

Pay and Benefits:

• Competitive salary based on experience.

• Unlimited leaves (including sick leaves, period leaves, and more).

• Inclusive, diverse, and innovation-first work culture.

Our hiring process will have 3 stages: a telephonic screening round, a technical interview and a culture-fit interview.

How to Apply?

We don’t believe in boring Leetcode-style interviews. That’s why we designed a CTF-style challenge that checks if you have the skills that really matter. Give it a shot at https://workwithus.lucioai.com/