AI Platform Engineer, API & Integrations - Hybrid

Factorial; Oleiros; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Private health insurance (Alan)

Wellhub health & fitness

Cobee expenses

Language classes

Breakfast and organic fruit

Nora food discounts

Pet friendly workplace

Job summary

Factorial is seeking an engineering lead to own the public API and integrations framework, collaborating with Product and Design to deliver scalable APIs and AI-enabled features. You will mentor peers, drive production-grade code, and help define the AI strategy tied to the YepCode acquisition.

The role emphasizes end-to-end ownership, speed, and adaptability across a multi-team environment, with on-site collaboration and a strong design-system focus.

Qualifications

• Development maturity: produce solid, well-tested, production-grade code and own systems end-to-end.
• Proven impact: demonstrated projects or contributions that produced measurable results.
• Product-first thinking: design end-to-end experiences, not isolated components.
• Speed and adaptability: experiment, learn, and iterate quickly.
• Abstraction mindset: experience with legacy/monolithic systems and reusable frameworks.
• Optional bonus: experience with LLMs, skill-based agents, or AI protocols.

Responsibilities

• Own end-to-end development of the public API and integrations framework, from problem definition and system design to shipping, monitoring, and iteration in production.
• Collaborate closely with Product and Design to shape APIs and frameworks that meet real user needs.
• Ensure consistent user and integration experience across verticals, aligned with Factorial’s design system.
• Participate in customer calls, reviews, and feedback sessions to understand workflows and pain points.
• Mentor peers, document learnings, and contribute to engineering best practices.
• Define and drive AI initiatives related to the YepCode acquisition, including skill-based agents, evaluation frameworks, RAG, and agentic workflows.

Skills

API development

System design

Mentoring

Product-focused thinking

Adaptability

Tools

LLMs

APIs

Cloud platforms

Job description

Factorial is seeking an engineering lead to own the public API and integrations framework, collaborating with Product and Design to deliver scalable APIs and AI-enabled features. You will mentor peers, drive production-grade code, and help define the AI strategy tied to the YepCode acquisition.

The role emphasizes end-to-end ownership, speed, and adaptability across a multi-team environment, with on-site collaboration and a strong design-system focus.