Senior Software Engineer-Backend Major - Code Foundations

Back Market

Barcelona

Hybrid

EUR 60,000 - 90,000

Full time

14 days+

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Benefits offered by this job

Office in Barcelona

Job summary

Back Market in Barcelona is seeking an experienced Software Engineer to join the Code Foundation team. You will work across the stack, collaborating with squad members and the Staff engineer to advance the platform, services, and tooling in a fast-growing, multinational environment.

In this role you will design and implement scalable backend services, contribute to frontend features with modern JavaScript frameworks, and help ensure robust observability, performance, and reliability as the

Qualifications

3+ years backend development experience.
Strong system design skills.
Experience with microservices and distributed systems.
Deep understanding of data architecture and APIs.
Experience with performance optimization and scalability.
Frontend capabilities with modern JavaScript frameworks.
Ability to independently build frontend features.

Responsibilities

Own ownership across the tech stack and take on new challenges.
Build, launch, monitor and support the product you own.
Deliver seamless user experiences at scale.
Contribute to clean, well-organised code and standards.
Collaborate with squad and Chapter to align technical direction.

Skills

Backend development

Microservices

Distributed systems

APIs

Performance optimization

Frontend development

JavaScript frameworks

Team collaboration

Tools

Python

FastAPI

SQLAlchemy

Golang

Django

VueJS

Typescript

Nuxt

Kubernetes

Docker

CircleCI

GitHub

Datadog

ArgoCD

BigQuery

Redis

Kafka

RabbitMQ

Job description

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?

About the team

The Code Foundation team is dedicated to providing foundational tools, libraries, and standards that enhance developer productivity and ensure consistency across application development. By fostering a culture of experimentation and enabling robust observability, the team empowers developers to deliver high-quality products efficiently and effectively.

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.

What you will do in this role

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).

Our technical environment

Backend stack: Python - FastAPI , SQLAlchemy, Celery, Golang, Django (being phased out)

Frontend stack: VueJS, Typescript, Nuxt, Revolve ( our design system)
Data: PostgreSQL, Redis, Kafka, RabbitMQ, BigQuery
Infrastructure: GCP, Kubernetes, Docker, Datadog, ArgoCD, CircleCI, Github

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 an Experienced Engineer: 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 sizable potential impact for the team.
Is able to contribute actively to high impact chaos mitigation.
Identifies and advocate for prioritization of tasks that can optimize delivery

Backend focus (experienced):