Senior Network Engineer - DevOps

  • Contract Type: Full-Time
  • Location: Ile De France, France (75019)


Founded in November 2014, Back Market is the number one European (and soon global) marketplace specializing in the sale of fully refurbished tech devices.

Their concept is simple but radical. By helping their customers discover and purchase the highest quality refurbished electronics they are creating an alternative to the mainstream behavior of always purchasing new products. Prolonging the lives of these devices has a significant global impact. E-Waste accounts for 70% of all our toxic waste! By prolonging the lives of kitchen appliances, computers, mobile devices and more, they have already saved 3,766 tonnes of e.waste since 2014 💪

Job Description

The Infrastructure team is made of 6 people based in Paris but also in other cities in France that come from various horizons and have diverse skills and backgrounds. We provide a robust and scalable infrastructure to host services developed by the Bureau of Technology, and monitor to ensure system health. We strive to always improve the platform stability, performance and security, and to provide the best developer experience while keeping costs under control.

As a Senior Network Engineer you will be in charge of designing and operating the network used by the cloud infrastructure that support Back Market websites in Europe, America and Asia. You’ll be using Infrastructure as Code tools like TerraForm to implement it, and aim to provide resilience and elasticity to the Kubernetes clusters running in the AWS/GCP clouds. Part of the Platform Tribe, the infrastructure team works closely with the developers to provide tools and processes they need to build and run new features while promoting the DevOps culture, like Continuous Deployment. You’ll also help developers tackle their challenges by providing best-in-class architecture.

Your work will be to build and operate the best-in-class network topology for our Kubernetes clusters, allowing it to scale with the business. This includes among other things VPC configuration and peering, VPN, CNI, Ingress, Service Mesh, and API Gateway implementation/operation. You’ll help us with the challenges we’re facing related to our multi-accounts, multi-providers architecture that is available across multiple continents. You’ll for instance work with our DBA team to help build a geo-distributed database. Security will also be one of your critical concerns.

Your deep knowledge of the HTTP Protocol will allow you to optimize the requests made to our website to provide the best experience possible to our customers and merchants, by configuring the HTTP cache system we use from CloudFlare to achieve the highest hit/cache ratio with a intelligent invalidation system preventing unnecessary requests to reach our infrastructure while enabling SEO to crawl as many pages as possible each time.

You’ll help teams leverage CDN, following best-practices you intend to define with our architects and share them with developers, making the experience on our websites the most swift and frictionless possible for all our customers, mobile or not, in current and future markets.

Among other things you’ll be able to lead or to be part of working groups to think, compare, test, propose, decide, implement and run new projects that are part of the roadmap we define together for each quarter. We are looking for people passionate about technology, but who also aim to make the best choices based on the business needs they intend to cover. We strongly believe that many people can build complex solutions, but we’d rather build solutions that are as appropriate and simple as possible: therefore deliverable, reliable and maintainable. We can always add more complexity later on if we need to.

You’ll do your best to automate what can be, provide documentation and training to developers, and proposing any enhancement you deem relevant. You’ll be encouraged to take a step backwards and think about the global picture, and communicate with others to share your ideas, as we value everyone’s.

You’ll also take part in on-call rotations to ensure the websites are running as expected, and report incidents to our incident tracking to prevent them from becoming problems.

Preferred Experience

  • At least a 5 years experience in an Infrastructure or Network Engineer position.
  • Strong understanding of DevOps principles
  • Expert on OSI model all the way down, and you can operate fluently in level 2-3, 4 and 7 indistinguishably
  • Able to build fast and secure architecture
  • You have a successful experience in Cloud infrastructure, and container orchestrators: Kubernetes is a plus
  • Ingress Controller, Service Mesh and API Gateway are components that you’ll handle or work with
  • Understanding of HTTP protocol and you can help developers design the fastest applications using CDN and HTTP Caching
  • You’re modest and value cordial debates over trying to “win”
  • Always learning from others
  • You are autonomous in a way that allow you to drive a tech topic until its realization
  • And you like to do this as a team, while communicating about it regularly
  • Willingness to be involved in the run and on-call with a "whatever it takes" attitude
  • You like infrastructure and design it for the success of the business
  • You make sure to always include security from the ground up
  • You have an interest in programming and especially Go, and are open to other technologies
  • You aim to always stay up to date and make sure to read on a regular basis tech news
  • Interest in a challenging technical environment: AWS, GCP, Kubernetes, Terraform, Terragrunt, GoLang, Django, Flask, DataDog, Spinnaker, Cloudflare, Docker, etc
  • Great verbal and written communication skills, in English

Additional Information

  • Contract Type: Full-Time
  • Location: Ile De France, France (75019)
  • Education Level: Bachelor's Degree
  • Experience: > 5 years
  • Possible full remote