Senior Backend Engineer in Barcelona


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Job Description

Back Market is the world’s leading refurbished electronics marketplace with a team of more than 650, powering operations in 16 countries (and counting!).
Back Market is undergoing meteoric growth and has raised $884 million, with a valuation of $5.7 billion. Our mission is simple: empowering people to buy tech sustainably by offering folks a high-quality, accessible, and more eco-friendly alternative to buying new electronics. Why? Refurbished tech helps lower our collective environmental impact.
Be part of a great and growing adventure that will change the way the world consumes tech.
Our engineering department, the Bureau of technology
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.
As a Senior Backend 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 Backend 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.
To know more about our Tech team, composed today of about 300 people, you can consult:
– A video of our CTO (ex- VP of Engineering):
– Our Career Site:
– Some articles written by member of the BoT:

Main technical challenges
Traditionally based on a monolith, Back Market’s technical stack has been undergoing a radical transformation in recent years into a distributed and service-oriented architecture. This transition provides an opportunity to modernize the platform, raising engineering standards.
Building a set of efficient and loosely coupled services is one of the main challenges to face for the years to come. But teams are excited to independently control their release schedules, manage their data, SLAs, tools, and – ultimately – be responsible for their own service-offering. Meanwhile, Platform teams are working to provide a scalable, consistent and secure platform, one that makes engineering teams more productive.  
As a Senior Backend Engineer, the challenge is three-fold:
1. Ensure a seamless transition with zero downtime and no revenue loss.
2. Reduce complexity while increasing adaptability of the codebase in the context of new country openings.
3. Guarantee high performance and reliability of production environments

Our technical environment
Python – FastAPI framework
Django (being phased out)
Kubernetes (GKE) / Docker
ArgoCD / CircleCI / Github
What you will do in this role 
We are looking for a Senior Backend Engineer to help us build & operate a set of efficient, high cohesion, low coupling services with security and privacy by design in order to support the growth of the business.
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.
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).

Key responsibilities for this position as a Senior Engineer I : Produce, Innovate & Share

  • Facilitates meaningful discussions around complex issues.
  • Suggests or makes improvements for existing designs and architecture for quarter-bounded projects or mission-critical areas in their squad.
  • Explores technologies with a sizable potential impact on the team.
  • Is able to contribute actively to high-impact chaos mitigation.

Key responsibilities for this position as a Senior Engineer II: Deliver, Advocate & Coordinate

  • Collaborates across the BoT to document and design how systems work and interact.
  • Masters their domain(s) technical scope.
  • Actively participates in defining the roadmap of their squad for the next 6 months.
  • Defines and promotes best practices, and shares knowledge through training sessions.
  • Proactively takes ownership of transversal initiatives.
  • Works with a full level of autonomy, based on management directions

Recruitment Process

  • Call with Ana one of our tech talent acquisition specialists based in Málaga.
  • Technical Screening – 30mns code review
  • Tech Interview – 2h with two Engineers from the Tech Team
  • Team Fit interview with your future Manager
  • Back Market Values fit interview

About BackMarket


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