Senior Backend engineer

BeTomorrow – SARL; Bordeaux; Hybrid; EUR 70,000 - 95,000; Full time

Job summary

BeTomorrow – SARL in Bordeaux is seeking an experienced backend developer to join our agile teams and deliver robust server-side applications across cloud, AI, and data platforms.

You will work with SpringBoot (Kotlin), FastAPI, and NestJS, embrace CI/CD, containerization with Docker, and continuously improve code quality for long-term maintainability.

We value curiosity about AI and generative tools and offer a collaborative environment with varied projects from luxury to healthcare.

Qualifications

• At least 5 years of experience in backend development.
• Deep expertise with a web/API framework (SpringBoot, NestJS, Symfony, Actix, Rails, etc.).
• Familiar with agile practices: Scrum, code reviews, pair programming, CI/CD.
• Emphasis on clean, maintainable, scalable code and architecture.
• Experience with containerization (Docker, etc.).
• Knowledge of cloud services (AWS, Azure, GCP) or strong Linux/network skills.
• Comfort using code-generation tools (Copilot, ChatGPT, Cursor) without compromising judgment.
• Motivation to deepen knowledge of AI and generative AI.

Responsibilities

• Design, develop and deploy server-side applications across cloud, AI and data platforms.
• Participate in agile ceremonies and maintain high code quality through reviews and testing.

Skills

Backend development

SpringBoot/NestJS/FastAPI

CI/CD

Docker

Cloud platforms

Tools

Docker

AWS/Azure/GCP

LangChain

Job description

About BeTomorrow

BeTomorrow is a Bordeaux-based digital services agency specializing in web, mobile, AI and data applications. For more than 20 years, our 70 passionate team members have been designing and developing impactful digital products. Our hallmark? Premium-quality delivery and agile management that fosters collective intelligence. We constantly cultivate our skills and versatility: artificial intelligence, cloud architecture, mobile/web/AI applications, and augmented reality.

A few examples of what we’ve built: live sports tracking for PMU, augmented reality for sailing races (including the Olympic Games), the official G20 app for the European Union, and the TBM mobile app for Bordeaux transportation. We also develop our own AI models: ALLY, the mobility assistant, and Planéa, an AI companion for architects. We support startups, large corporations, and global leaders. Joining BeTomorrow means exploring various industries and leveraging collective experience.

We have also been CIR (Research Tax Credit) certified for over 10 years.

You will join one of our Agile Scrum teams based at our Bordeaux office. You will participate in the design, development, and deployment of server-side applications across various cloud, AI, and data platforms, contributing to ambitious and diverse projects (luxury, healthcare, entertainment, industry, etc.).

Our teams enjoy significant freedom in choosing the technologies they believe are most relevant to their project.

Our Main Tech Stack

Frameworks: SpringBoot (Kotlin) / FastAPI (Python) / Nest.js (Typescript)

Databases: MySQL / PostgreSQL / Firestore

Cloud: AWS / Azure / GCP / Firebase / Supabase

DevOps: Terraform / Serverless / GitlabCI / Azure DevOps

AI: Python / LangChain / Google ADK (agent-based systems) + Vertex AI / Azure AI Services

Do you see yourself in this profile?

• You have at least 5 years of experience in backend development


• You have deep expertise with a web/API framework such as SpringBoot or an equivalent (NestJS, Symfony, Actix, Rails, …)


• You are comfortable with agile development practices: Scrum, code reviews, pair programming, CI/CD


• You place the highest importance on structural code quality and long-term maintainability, and apply appropriate development strategies


• You have experience with containerization (Docker, etc.)


• You are familiar with cloud services (AWS, Azure, or Google), or you have strong Linux or network administration skills


• You feel comfortable using code-generation assistants (Copilot, ChatGPT, Cursor, etc.) and know how to use them without delegating your technical judgment


• You are motivated to deepen your knowledge of AI and generative AI

At BeTomorrow, we are convinced that diversity is a strength.

All applications are reviewed with the same level of attention.

We foster an inclusive work environment and adapt our processes to ensure equal opportunities for everyone to succeed and thrive professionally.