Senior Backend Engineer (Node.js/Python) - Remote & AI Systems

Lever, Inc.; France; À distance; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Fully remote

Work from Europe

Flexible schedule

International team

Remote-first culture

Résumé du poste

Lever, Inc. is seeking a Senior Software Engineer (Node.js/Python) based in France to lead backend and AI-enabled systems for a cutting-edge mobility platform. You will design, develop, and operate reliable web services and APIs using Node.js, TypeScript, and Python.

You will own architectural decisions, build scalable distributed systems, and collaborate with AI, product, frontend, QA, DevOps, and partners to deliver business value. Strong English communication and leadership are essential.

Qualifications

• 7+ years of professional experience designing, building, and operating production-grade web services.
• Strong CS fundamentals and understanding of concurrency and algorithms.
• Experience with distributed systems and challenges of distributed computing.
• Proficiency with Node.js and TypeScript; experience with Express or NestJS.
• Production-grade RESTful APIs design including versioning, auth, rate limiting, and pagination.
• Knowledge of scalable architectures (microservices, event-driven, CQRS).
• Experience with Docker and Kubernetes; CI/CD in modern pipelines.
• Strong SQL skills with PostgreSQL or MySQL; performance optimization.
• Professional English communication; documentation and knowledge sharing.
• Experience deploying services on AWS (Lambda, ECS/EKS, RDS, SQS, CloudWatch) is a strong plus.
• Python backend development is highly desirable.
• NoSQL knowledge (MongoDB) is an advantage.

Responsabilités

• Design, develop, and operate scalable web services and APIs using Node.js, TypeScript, and Python.
• Own AI-based backend solutions and operationalize Python AI tools within production services.
• Make high‑level architecture decisions balancing scalability, performance, reliability, security, and maintainability.
• Build and maintain production‑grade RESTful APIs with authentication, versioning, rate limiting, and pagination.
• Develop distributed systems using microservices, event-driven patterns, and CQRS.
• Troubleshoot production issues and maintain system stability and service quality.
• Enforce coding standards for clean, maintainable code.
• Collaborate across AI, product, frontend, QA, DevOps, and partners.
• Own the technical backlog with clear priorities and transparency.
• Evaluate technologies to improve speed, reliability, and outcomes.
• Contribute to process improvements and knowledge sharing.
• Maintain technical docs and communicate in English.
• Mentor engineers and foster an open, collaborative culture.

Connaissances

Node.js

TypeScript

Python

Distributed systems

REST APIs

CI/CD

AWS

Docker/Kubernetes

SQL

English communication

Mentorship

Description du poste

Lever, Inc. is seeking a Senior Software Engineer (Node.js/Python) based in France to lead backend and AI-enabled systems for a cutting-edge mobility platform. You will design, develop, and operate reliable web services and APIs using Node.js, TypeScript, and Python.

You will own architectural decisions, build scalable distributed systems, and collaborate with AI, product, frontend, QA, DevOps, and partners to deliver business value. Strong English communication and leadership are essential.