Senior Software Engineer - Factorial Tech Spinoff

Hello! 👋

🌟 Join us as a Founding Engineer in a brand-new Factorial spinoff!

We’re building a completely new startup inside Factorial. We’re on a mission to rethink how companies manage workflows, org charts, policies, and analytics, the core of what defines Factorial.

This new spinoff comes with a bold ambition: growing from 0 to 10 million in under a year. Yes, it's an extremely ambitious target… and that’s exactly why we’re looking for people who get excited by challenges of this scale!

The good news? We’re not starting from scratch. With +15,000 existing customers, we have a massive opportunity for immediate upselling, supported by a dedicated GTM team.

You’ll be joining from day 0, in an environment where the tech stack matters far less than your ability to build fast, adapt quickly, and shape something entirely new.

Expect a different pace than the rest of Factorial: fast, high-energy, full of things to create, fix, and define. If you thrive in creative chaos, love building from the ground up, and enjoy the vibe of small, scrappy startups more than corporate settings, you’re going to feel right at home. Factorial is hiring a Founding Engineer to help us build the next generation of internal IT tools for thousands of businesses worldwide.

We're particularly interested in candidates with strong experience in Ruby on Rails for the backend. On the frontend, we're looking for solid skills in React, JavaScript, or TypeScript. But bear in mind that we’re not looking for a long list of skills and technologies. What matters the most is your excitement to build things from scratch!

💻 About the IT Management Domain

You’ll join the newly formed IT Management domain, where we’re creating a platform to manage onboarding, permissions, support, and equipment, so new employees are productive from day one. If you’re excited about shaping a new product area, owning features end-to-end, and working in a people-first company with a strong engineering culture, this role is for you.

Our mission in the IT Management Domain is building this new product in Factorial, including multiples moving pieces (inventory management, support ticketing, MDM, IdP, integrated onboarding, etc.), so employees are productive as soon as they receive the equipment and complete the onboarding process.

The Engineering team at large 🙌🏼

At Factorial, we have a team of +200 very talented Engineers. We look for smart people who are curious, proactive and have great communication skills.

At Factorial, we follow an AI-first development approach to design and ship products faster and more reliably. We build using spec-driven development, defining clear behaviours, constraints, and success criteria upfront, and implement reusable AI skills and agentic workflows that safely automate actions while keeping humans in control of critical decisions. To ensure reliability and continuous improvement, we use RAG systems and robust evaluation frameworks (Evals) that ground AI outputs in trusted company data and measure quality through automated and human-in-the-loop evaluations.

🎯Your profile

1. You are a team player: You are comfortable helping your teammates, sharing your knowledge, reviewing their code and asking for reviews of your own.

2. You have a user-centric mindset: You know that the only reason we write code is to help our users to perform their tasks.

3. You are a learner: you want to improve your skills not only in the engineering field but across any other areas.

4. You are an owner: You like proposing new hypotheses and being responsible for building, deploying and validating them.

5. You love understanding: Breaking down complex problems into basic and shareable elements.

6. You are a polyglot developer: You have experience in several coding languages (especially for backend development), CI/CD tools and cloud technologies.

7. You are a mentor: You love to share your experience and expertise to help others grow.

8. You have a couple of years of experience working as a software engineer.

9. You are comfortable communicating in English.

At Factorial we don't evaluate you by the years of experience you have, we evaluate your knowledge, skills and engagement. How? We have a <