Staff Software Engineer: AI-Native Features & Tech Leadership

Factorial; Oleiros; On-site; EUR 90,000 - 120,000; Full time

Job summary

Factorial is seeking a Staff Software Engineer to help build AI-native features into our product. You’ll write Rails and React, design systems, and ship real features to production, working closely with Product and Design.

You’ll lead technical initiatives and set direction for meaningful parts of the roadmap, collaborating closely with Product. This role centers on building with AI APIs, not training models.

Qualifications

• Solid depth in both backend and frontend software engineering.
• Shipped real products to production, not just prototypes.
• Experience integrating LLM APIs into product features.
• Ability to lead technical decisions and influence roadmaps.

Responsibilities

• Lead technical initiatives and set direction for meaningful roadmap chunks.
• Collaborate closely with Product and Design from early conversations.

Skills

Backend & frontend

APIs & cloud platforms

LLM integration

Architectural design

Leadership

Tools

Rails

React

AWS

GCP

Azure

Job description

Factorial is seeking a Staff Software Engineer to help build AI-native features into our product. You’ll write Rails and React, design systems, and ship real features to production, working closely with Product and Design.

You’ll lead technical initiatives and set direction for meaningful parts of the roadmap, collaborating closely with Product. This role centers on building with AI APIs, not training models.