The Team
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The Operations domain sits at the core of Factorial. This is where we build the systems that run the day‑to‑day reality of work for thousands of companies, systems that must be accurate, compliant and reliable. Our teams own business‑critical workflows such as:
How employee time is tracked, planned, and managed
How the employee journey is modeled from onboarding to offboarding
How companies represent their organizational structure
How compensation and payroll data are calculated and trusted
Our mission is to turn operational complexity into simple, AI‑powered experiences, helping companies run smoothly at scale while keeping humans in control of what matters most.
What you’ll do as a Staff Engineer in AI
Define how we build AI at scale. Drive the evolution of modern AI development practices across the organization.
Lead spec‑driven development for AI. Promote a culture of defining clear specifications before shipping, including expected behaviours, constraints, risk boundaries, and measurable success criteria.
Build reusable AI foundations. Design and implement shared AI capabilities and abstractions that can be adopted across multiple product domains.
Design and evolve AI skills. Drive the creation of modular, reusable AI “skills” that can automate real workflows and take safe auditable actions within Factorial’s ecosystem.
Establish robust evaluation frameworks. Lead the development of automated and human‑in‑the‑loop evaluation systems to measure quality, correctness, safety, and reliability.
Shape retrieval‑augmented generation strategies. Define how we ground AI systems in trusted company and customer data.
Design human‑in‑the‑loop and agentic workflows. Architect systems that combine LLMs, rules, and user oversight.
Own systems end‑to‑end. Lead initiatives from problem definition and system design to production rollout, monitoring, and continuous improvement.
Stay deeply connected to customers. Engage with customers directly to understand real workflows, risks, and constraints.
Partner with Product, Design, and Leadership. Collaborate cross‑functionally to embed AI into core product experiences.
Raise the bar across the company. Mentor engineers, contribute to hiring and technical growth, and define best practices that elevate Factorial’s engineering culture and AI maturity.
Who This Is For
AI as a habit – you’ve built real AI‑powered systems or workflows (not just experiments)
Proven impact – shipped projects, side projects, or contributions that made a measurable difference
Product‑first thinking – you design complete experiences, not just isolated components
Speed & adaptability – you experiment, learn, and iterate fast
Strong Staff Engineers at Factorial have
Very solid software engineering expertise in both backend and frontend
Experience with cloud platforms, such as AWS, Azure, or Google Cloud Platform
Experience shipping real products to production
Knowledge of APIs, cloud platforms, and system design
Seen as leaders technically and culturally, maintaining high‑quality standards
Challenge engineering processes, from hiring to code deployment
Drive adoption of new abstractions, creating supporting ecosystems like documentation and metrics
Lead key technical decisions and create company‑wide abstractions
Excellent communication skills in English;
knowledge of other languages is a plus, specially Spanish
Benefits
High growth, multicultural and friendly environment
Alan private health insurance
Healthy life with Wellhub (gyms, pools, outdoor classes)
Save expenses with Cobee
Language classes
Breakfast in the office and organic fruit
Nora discounts
Free caffeine and theine
Our Values
We own it: we take responsibility for every project. We make decisions, not excuses.
We learn and teach: we’re dedicated to learning something new every day and, above all, share it.
We partner: every decision is a team decision. We trust each other.
We grow fast: we act fast. We think that the worst mistake is not learning from them.
We believe in diverse talent: we welcome applicants from all backgrounds and strongly encourage people of diverse experiences and identities to apply.
We believe in inclusion: we are committed to equal opportunities and actively promote workplace inclusion of people with disabilities.
EEO Statement
Factorial is an equal opportunity employer. xhfqzwm We are committed to equal opportunities and actively promote workplace inclusion of people with disabilities. If you would like to learn more about our inclusive recruitment processes, you are welcome to indicate so optionally and we will share additional information with you.
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