Senior Fullstack Engineer – AI

LumApps

Senior Full Stack Engineer at LumApps, focusing on AI-driven solutions across the platform. Collaborating with teams to define technical vision and mentor engineers in modern software practices.

Posted 6/10/2026full-timeLyon • 🇫🇷 FranceSeniorWebsite

Tech Stack

Tools & technologies

AzureCloudGoogle Cloud PlatformMicroservicesPostgresPythonReactTypeScript

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

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.

Benefits

Comp & perks

Hybrid work model – 2 days at the office, 3 days remote
RTT days – ~10 extra days off per year
Meal vouchers (SWILE) + free snacks & coffee
Yoga classes - Take a mindful break in our Paris office
Supportive parental leave and family moments — yes, even a Christmas party for your kids !
Health insurance (ALAN) – 60% covered + full life & disability cover
Afterworks, team celebrations & seasonal parties
Equipment of your choice
French & English lessons , professional development & access to Leeto CSE

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

PythonTypeScriptReactAPI designmicroservicesClean ArchitectureSOLID principlesPostgreSQLSQLAlchemyagent interoperability protocols

Soft Skills

mentoringcommunicationteam culturepsychological safetytechnical excellencefeedbackleadership