Senior Fullstack Engineer – AI

Jobtailor; Lyon; Sur place; EUR 90 000 - 120 000; Plein temps

Résumé du poste

Jobtailor in Lyon, France is seeking a senior software engineer to define and own the AI Agents tribe's technical vision across the stack. You will drive architectural decisions, from agent communication protocols to data modeling, and independently scope complex end-to-end solutions.

You will plan multi-team initiatives, mentor engineers, and define canonical patterns for testing, performance, observability, and security, shaping the team's culture toward excellence.

Qualifications

• 6+ years of professional software engineering experience.
• Deep expertise in Python for backend services.
• Solid command of TypeScript and React (v17+) on the frontend.
• Strong opinions on API design, service boundaries, component design.
• Comfortable building production microservices following Clean Architecture / SOLID principles.
• Experience with relational databases (PostgreSQL, SQLAlchemy).
• Hands-on experience with agent interoperability protocols like MCP and A2A.
• Experience shipping and operating services in the cloud (GCP and/or Azure).
• Fluency in English and ability to communicate technical concepts clearly.
• Ability to mentor and build team culture grounded in psychological safety and technical excellence.

Responsabilités

• Define and own the technical vision for the AI Agents tribe across the stack.
• Drive major architectural decisions — from agent communication protocols to data modeling.
• Independently scope and implement complex end-to-end solutions
• Plan and execute projects that span multiple teams within the tribe
• Mentor Software Engineers, providing actionable feedback on strategy, impact, execution, and technical depth
• Define canonical patterns and lead-by-example on testing, performance, observability, and security.

Connaissances

Python backend

TypeScript & React

API design

SOLID / Clean Architecture

PostgreSQL / SQLAlchemy

Cloud: GCP/Azure

MCP / A2A protocols

Mentoring

English communication

Description du poste

Responsibilities

• Define and own the technical vision for the AI Agents tribe across the stack
• Drive major architectural decisions — from agent communication protocols to data modeling
• Independently scope and implement complex end-to-end solutions
• Plan and execute projects that span multiple teams within the tribe
• Mentor Software Engineers, providing actionable feedback on strategy, impact, execution, and technical depth
• Define canonical patterns and lead-by-example on testing, performance, observability, and security.

Qualifications

• 6+ years of professional software engineering experience
• Deep expertise in Python for backend services
• Solid command of TypeScript and React (v17+) on the frontend
• Strong opinions on API design, service boundaries, component design
• Comfortable building production microservices following Clean Architecture / SOLID principles
• Experience with relational databases (PostgreSQL, SQLAlchemy)
• Hands-on experience with agent interoperability protocols like MCP and A2A
• Experience shipping and operating services in the cloud (GCP and/or Azure)
• Fluency in English and ability to communicate technical concepts clearly
• Ability to mentor and build team culture grounded in psychological safety and technical excellence