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Senior Backend Engineer - Acquisition

Back Market is the world’s leading refurbished electronics marketplace with a team of more than 650, powering operations in 18 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.



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:

Ensure a seamless transition with zero downtime and no revenue loss

Reduce complexity while increasing adaptability of the codebase in the context of new country openings

Guarantee high performance and reliability of production environments


Our technical environment


Application

Python - FastAPI framework

SQLAlchemy

Celery

Golang

Django (being phased out)


Data

PostgreSQL

Redis

Kafka

RabbitMQ

BigQuery


Infrastructure

GCP

Kubernetes (GKE) / Docker

Datadog

ArgoCD / CircleCI / Github



What you will do in this role 🕵️


We are looking for a Senior Backend Engineerto 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)


As a Senior I 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 migration.
  • Identifiesand advocate for prioritization of tasks that can optimize delivery


Recruitment process
  • Call with Ana (45 minutes), one of our tech talent acquisition specialist
  • Coding & Testing interview- 1hour
  • System Design & Data interview- 45 minutes each part
  • Tech Leadership interview- 1 hour
  • Back Market Values fit interview


Hybrid office policy

Bordeaux - 3 days / week at the office - Monday is mandatory


* Why join us ? *


A meaningful job: you will help avoid thousands of tons of electronic waste and fight against planned obsolescence. It counts!

A meaningful company: we became a mission-driven company in January 2022.

- Be part of a worldwide growing company based in Europe, the USA and Asia to face great challenges : you will have the freedom to innovate and adopt new ideas!

Work alongside passionate experts:  who will share their knowledge and help you develop and grow in your career. 

Grow your career: with a flexible career path and a dedicated Learning & Development team. Back Market will help you evolve with personalized internal trainings and external handpicked providers from day 1!

Leadership Academy by Back Market:“be a coach not a dictator” is at the core of this program ! We train and enable all our leaders to support their team towards achieving goals. Be a manager at Back Market is an unique experience we take by heart.

An attractive salary, equity and a host of benefits including : Lunch voucher, health insurance, relocation package, paid time off for activism in your community, parental benefits, flexible hours, etc…

One Loving Tribe: you will have the opportunity to work in a fast-paced, open-minded and friendly environment. 

- Be part of one of our Employee Resource Groups createdaround shared identities, common backgrounds and/or special interests crafted to be a safe space and an expressive outlet. 

Several internal events: The Monday Brief (weekly)/ The Somehands (monthly)/ The All Hands (annual).

We’re here to SABOTAGE: It’s our mantra. It keeps us focused on what we aspire to be: a little bit sneaky, always smart, kinda frugal and constantly conspiring to create maximum impact.


Back Market is an Equal Opportunity Employer which means we pledge to not discriminate against employees based on race, color, religion, sex, national origin, age, disability or genetic information.. If reasonable accommodations are needed for the interview process, please do not hesitate to discuss this with the Talent Acquisition Team.


Back Market is helping to address one of the biggest challenges of our time: climate change. We take this so seriously that we were awarded status as a “Société à Mission”, or company with a social mission, by the French government. We know we can’t tackle a global problem without a globally representative team so we are committed to embedding diversity, equity and inclusion principles in every aspect of our organization. But more importantly, being One Loving & Free Spirited Tribe is in our DNA as it is one of the five foundational values of our company since we got started way back in 2014. We are committed to hiring and supporting diverse teams of people from all backgrounds, experiences, and perspectives. We know our lofty goals cannot be reached unless everyone has a seat at the table along with the resources and opportunity to grow.

Back Market Glassdoor Company Review
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CEO of Back Market
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Thibaud Hug de Larauze
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What You Should Know About Senior Backend Engineer - Acquisition, Back Market

Join Back Market as a Senior Backend Engineer in our vibrant Bordeaux office, and immerse yourself in the world’s leading refurbished electronics marketplace! Back Market is on a thrilling journey, having raised an impressive $884 million and growing our team to over 650 members across 18 countries. With our mission to empower consumers to make sustainable tech choices, we take pride in providing high-quality and eco-friendly alternatives to new electronics. As a Senior Backend Engineer, you will collaborate closely within agile teams, shaping the transition from our traditional monolith to a modern, distributed architecture. Your ability to create efficient, cohesive services will be pivotal in enhancing user experience and operational capabilities for our customers and suppliers. You’ll also engage with your squad regularly, sharing knowledge and solutions while advancing your technical skills in an environment that fosters continuous learning and improvement. Utilizing technologies like Python, FastAPI, and GCP, you'll work alongside passionate experts who are eager to innovate and explore new ideas. If you’re a team player with a passion for coding and a commitment to environmental sustainability, this is the perfect opportunity for you to grow your career while making a real difference. Let’s create a better future together!

Frequently Asked Questions (FAQs) for Senior Backend Engineer - Acquisition Role at Back Market
What are the main responsibilities of the Senior Backend Engineer at Back Market?

The Senior Backend Engineer at Back Market plays a crucial role in transitioning our technical infrastructure from a monolithic structure to a service-oriented architecture. This involves building efficient services with high cohesion and low coupling while ensuring security and privacy in every design. You will also collaborate with cross-functional teams to monitor and support the products you build, all within an agile environment that encourages ownership and accountability.

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What technical skills are required for a Senior Backend Engineer position at Back Market?

Candidates for the Senior Backend Engineer role at Back Market should have robust experience in application development with Python, FastAPI, and Golang, as well as a good understanding of SQLAlchemy, PostgreSQL, and various messaging queues such as Kafka and RabbitMQ. Familiarity with infrastructure tools like GCP and Kubernetes is also pivotal for managing deployment and scaling of applications.

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How does Back Market support the professional development of Senior Backend Engineers?

At Back Market, we value growth and continuous learning. As a Senior Backend Engineer, you will have access to personalized internal training sessions and external training providers as part of our Learning & Development framework. Additionally, you can engage in leadership programs that emphasize coaching and mentorship, allowing you to evolve your skills while actively contributing to a supportive community.

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What does the work culture look like at Back Market for Senior Backend Engineers?

Back Market fosters a collaborative and open-minded atmosphere that encourages innovation and sharing of ideas. As a Senior Backend Engineer, you will be part of a diverse and passionate team that actively participates in technical discussions, ongoing training, and internal events aimed at building a strong team spirit. Our mantra of 'SABOTAGE' reflects our clever and focused approach in creating maximum impact!

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What benefits can a Senior Backend Engineer expect at Back Market?

Senior Backend Engineers at Back Market enjoy an attractive salary and equity package, along with health insurance, lunch vouchers, a relocation package, flexible working hours, and parental benefits. We also support community activism with paid time off for involvement in local initiatives. Our culture promotes work-life balance with a hybrid office policy that includes mandatory office presence for team-building.

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Common Interview Questions for Senior Backend Engineer - Acquisition
Can you explain your experience with transitioning monolithic applications to microservices?

When answering this question, emphasize a specific project where you helped migrate a monolithic application to a microservices architecture. Discuss the challenges faced, such as managing data consistency and ensuring minimal downtime, and highlight the strategies you employed to overcome these issues, showcasing your technical and leadership skills.

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How do you ensure code quality in your backend services?

Discuss how you implement testing strategies such as unit tests, integration tests, and code reviews. Detail how you use tools like CI/CD pipelines to automate testing and deployments, ensuring that each service maintains high performance and reliability standards, reflecting your commitment to quality assurance.

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What are some performance optimization techniques you've applied in backend development?

Focus on specific techniques like database indexing, caching strategies with Redis, or load balancing to improve response times. Provide examples of measurable improvements in performance after applying these optimizations to demonstrate your analytical skills and proactive approach to problem-solving.

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Describe a challenging technical problem you've faced and how you resolved it.

Present a detailed case of a technical challenge you encountered, outlining the reasoning behind your chosen solution. Highlight your analytical approach to troubleshooting, any collaborations with team members, and the positive impact of your resolution on the project and the team.

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How do you manage version control and collaboration in your development team?

Explain how you use version control systems like Git for managing code changes, branching strategies for collaboration among team members, and your approach to conducting pull requests and code reviews to maintain a clear history of changes and ensure code quality.

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What experience do you have with cloud services and container orchestration?

Emphasize your familiarity with services like GCP for deploying applications and how you've used Kubernetes for managing container orchestration. Discuss specific scenarios where you've utilized these technologies to enhance scalability and reliability of your applications.

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Can you explain the significance of DevOps practices in your work?

Share your understanding of DevOps principles regarding collaboration between development and operations teams. Discuss how you have incorporated practices like continuous integration and delivery into your workflow to improve deployment frequency while maintaining quality.

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How do you keep current with developments in backend technologies?

Mention specific resources you use to stay informed, such as tech blogs, online courses, or community forums, and highlight any specific technologies or trends you are currently exploring that may benefit Back Market's mission in sustainable tech.

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What qualities do you believe a Senior Backend Engineer should possess?

Discuss technical expertise in backend technologies as well as soft skills like effective communication, team collaboration, and problem-solving capabilities. Explain how these qualities contribute to both individual success and the overall success of the team.

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How do you prioritize tasks in a fast-paced environment?

Explain your approach to task management by discussing how you assess urgency and impact, perhaps utilizing methodologies like Agile or Kanban. Emphasize your ability to adapt and remain flexible, ensuring that essential tasks align with team goals and company objectives.

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Leading the way in a shift towards a circular economy, freeing the planet from electronic waste, and building a leading global tech company are three solid reasons to wake up every morning. Taking part in Back Market’s adventure means committing ...

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DATE POSTED
February 21, 2025

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