Senior Backend Engineer — Hybrid, Scalable SaaS

The French Sourcer; Paris; Hybride; EUR 85 000 - 120 000; Plein temps

Avantages offerts par ce poste

Health insurance

meal vouchers

profit-sharing

hybrid working policy

Résumé du poste

The French Sourcer in Paris is seeking a Senior Backend Engineer to design and build scalable backend services for a high-traffic SaaS platform. You will work on APIs used by customer-facing products and internal systems, and help decompose a monolith into independently scalable services.

You’ll optimize performance, model relational data, write tests, review code, and collaborate with product managers, frontend engineers, and the platform team to improve deployment, observability, and

Qualifications

• 5+ years of experience developing backend applications.
• Experience designing and maintaining production APIs.
• Good knowledge of relational databases and data modelling.
• Understanding of distributed systems and asynchronous communication.
• Experience with automated testing, code reviews, and CI/CD.
• Professional French and English.

Responsabilités

• Designing and developing backend services for a high-traffic SaaS platform
• Building APIs used by customer-facing products and internal systems
• Breaking down parts of an existing monolith into clearly defined services
• Improving application performance, reliability, and scalability
• Designing relational data models and optimising critical queries
• Writing automated unit, integration, and API tests
• Reviewing code and contributing to shared engineering standards
• Investigating production issues across applications, databases, and infrastructure
• Working with product managers and frontend engineers to define technical solutions
• Improving deployment and release processes with the platform team
• Contributing to architecture decisions and technical documentation

Connaissances

Backend development

Java

Kotlin

C#

Node.js

API design

Relational DB

Distributed systems

CI/CD

Testing

French/English

Outils

Containers

Cloud environments

CI/CD pipelines

Description du poste

The French Sourcer in Paris is seeking a Senior Backend Engineer to design and build scalable backend services for a high-traffic SaaS platform. You will work on APIs used by customer-facing products and internal systems, and help decompose a monolith into independently scalable services.

You’ll optimize performance, model relational data, write tests, review code, and collaborate with product managers, frontend engineers, and the platform team to improve deployment, observability, and