Senior Software Engineer

Hi, we're Back Market.

We're here to help
make tech reliable, affordable, and better than new
. We're a global marketplace for refurbished devices, helping lower our collective environmental impact by providing trustworthy, affordable tech with 92% less carbon emissions than new.

Yep, you read that right. Turns out refurbished tech is way better for the planet than new. In fact, With every device purchased on Back Market, our positive impact on the planet grows. From our Customer Care representatives to our software engineer, every individual at Back Market cuts the planet — and consumers — a break.
Our mission is simple: to do more with what we already have.
Are you ready to join us?

Our technology department, known as the Bureau of Technology (BoT), is at the heart of Back Market. It consists of over 30 dynamic product teams that are engaged in developing and managing services to deliver significant value to our customers and suppliers.

These teams are effectively supported by our Platform group, which includes more than 10 specialized teams addressing cross-cutting technical issues to enhance our operational capabilities.

In addition to these functional teams, we have established numerous groups dedicated to sharing knowledge across various technical disciplines, such as security, backend, frontend, AI, and mobile. These groups serve as hubs for collaboration and professional development, providing ample learning opportunities and fostering a culture of continuous improvement.

Our staff engineers also play a pivotal role throughout the company, lending their expertise across different domains. They provide leadership and technical guidance, promoting alternative career paths for growth beyond traditional management roles.

About The Role
As part of the Bureau of Technology, you'll design, build, and scale AI-driven solutions to improve our Customer Care. You'll join a new team ,Care AI (a mix of data scientists and backend engineers) focused on enhancing the experience of our Customers in need of help with faster and more precise resolutions. Your focus will be in implementing and scaling our Care AI agents and improving AI powered features aimed at increasing agents efficiency, detecting customer sentiment and speeding up resolutions.

As a Software Engineer, you will work closely with all members of your squad, and the Staff engineer of your group. Bi-monthly rituals with your group and the Chapter will allow you to share what works for your squad, learn what works for others, and make sure your technical direction is aligned with the overall vision.

We're looking for
versatile
engineers who show strong ownership and are motivated to take on new challenges across the technical stack while helping us move our technology forward.

You will be working in an agile
"build it and run it"
environment where engineering teams build, launch, monitor and support the product that they own.

Driven by the desire to craft outstanding products, you understand how to deliver seamless user experiences at scale.

We are looking for
passion
in creating systems by producing clean, consistent and well-organised code.

As well as a good team player supporting colleagues and creating a learning and sharing environment

English must be a no-brainer
as you will join an international team dispatched in different locations around the world (US/FR/ES/JP).

What You'll Do

• Build scalable infrastructure and APIs to integrate AI capabilities (LLMs, ML models) into Back Market's customer care systems
• Implement AI agent actions, MCP server connections, and data pipelines enabling the Care AI Agent to serve customers 24/7
• Develop robust monitoring, evaluation, and safety guardrails for AI features handling sensitive customer interactions
• Collaborate with data scientists to productionize ML models and optimize performance at scale
• Strong backend engineering skills with keen interest in AI/ML technologies and willingness to learn about LLM integration patterns
• Passionate about leveraging AI to improve customer experiences and eager to work at the intersection of engineering and data science

**Our technical environment

Backend stack:**
Python - FastAPI , SQLAlchemy, Celery, Golang

Frontend stack
: VueJS, Typescript, Nuxt, Revolve ( our design system)

Data:
PostgreSQL, Redis, Kafka, RabbitMQ, BigQuery

Infrastructure:
GCP, Kubernetes, Docker, Datadog, ArgoCD, CircleCI, Github

Bonus Points
Familarity of
machine learning and statistical
concepts

Recruitment process

• Call with a Senior Tech TA, 45 min
• Coding and Testing module, 60 min
• System Design and API module, 45 min
• Data module, 45 min
• Technical Leadership, 45 min
• Meet your manager, 30 min
• Back Market Values fit interview - 45 min