Site Reliability Engineer

Centricsoftware; Paris; On-site; EUR 80,000 - 110,000; Full time

Job summary

Centric Software is seeking a Site Reliability Engineer to join our team in Paris. You will support our SaaS platform, working closely with software developers and infra engineers, security, and QA teams.

You will diagnose and resolve reliability and performance issues, tune the web-serving stack, and own deployment and upgrade processes end-to-end. Collaboration with product teams will drive continuous improvements.

Qualifications

• 2+ years proven experience with Linux CLI.
• 2+ years proven experience with Docker or other container technology.
• Strong hands-on experience with PHP applications and their runtime (php-fpm).
• 5+ years proven experience with Git.
• Knowledge across Linux Kernel, Load Balancing, AWS S3, containers orchestration, MySQL/MariaDB and Elasticsearch.
• B2 English

Responsibilities

• Diagnose and resolve application-level reliability and performance issues across the pull request path (nginx -> php-fpm -> application -> database/cache).
• Tune and scale the web-serving layer under production load (php-fpm pool sizing, nginx timeouts, capacity planning).
• Configure and troubleshoot nginx as reverse proxy/web server (timeouts, buffering, upstream keepalive, 502/504).
• Develop, maintain, and support Docker-based workloads.
• Own the product deployment and upgrade process end to end.
• Support and troubleshoot running customer-facing services.
• Collaborate with product teams to plan improvements and roll them out.
• Define reliability metrics and ensure system health across services.
• Participate in On-Call and On-Duty rotations.

Skills

Linux CLI

Docker

PHP runtime debugging

Git

Cloud technologies

MySQL/MariaDB

Elasticsearch

Load balancing

Tools

Kubernetes

CI/CD tools

Terraform

Ansible

AWS

Datadog/Prometheus

RabbitMQ

Job description

About Centric Software:

Centric Software® is a global leader, providing an innovative and AI-enabled product-concept-to-commercialization platform for retailers, brands and manufacturers of all sizes. We equip retail, fashion, luxury, footwear, outdoor, home and consumer goods brands with pioneering best-of-breed solutions to plan, design, develop, source, comply, buy, make, price, allocate, sell and replenish products. Our technology powers brands to streamline processes, drive efficiency and operate with confidence in an ever-changing market. Our story is one of rapid growth, bold ideas and extraordinary opportunities. We're here to challenge the status quo-and we're looking for brilliant people who want to do the same. No matter where you are in the world, this is your chance to be part of something exceptional.

OUR VISION FOR THIS ROLE:

In your new role as Site Reliability Engineer , you will support us right in the heart of our SaaS, as an integral member of the Site Reliability Engineering team. You will be responsible for the Shoppingfeed product, working in close relations with our software developers and infrastructure engineers, but also with our security and QA colleagues.

YOUR CURRENT TASKS WITH THE OPPORTUNITY TO GROW - WHAT WILL YOUR LIFE AT CENTRIC SOFTWARE LOOK LIKE?

• Diagnose and resolve application-level reliability and performances issues across the pull request path (nginx -> php-fpm -> application -> database/cache)
• Tune and scale the web-serving layer under production load - php-fpm pool sizing and process management, nginx timeouts/buffering/upstream keepalive, capacity planning.
• Solid experience configuring and troubleshooting nginx as a reverse proxy / web server (timeouts, buffering, upstream keepalive, diagnosing 502/504s).
• Proven experience diagnosing and resolving performance and scaling problems under load (latency, worker/pool saturation, capacity planning).
• Develop, maintain, and support our own Docker-based workloads
• Own the product deployment and upgrade process end to end
• Support and troubleshoot running customer-facing services
• Work 50% of your time with our product teams, ensuring much-needed improvements get defined, explained, worked on and rolled out
• Continuously helping to improve both our product and the infrastructure underneath, by taking the responsibility together with your team
• Define reliability metrics and ensure they are kept by all the systems you oversee
• Be part of our On-Call and On-Duty rotations

YOUR PROFILE - WHAT DO YOU NEED TO FIT IN?

Minimum qualifications

• 2+ years proven experience with Linux CLI
• 2+ years proven experience with Docker or other container technology
• Strong hands-on experience with PHP applications and their runtime (php-fpm process management), able to read and debug application code
• 5+ years proven experience with GIT
• You have good knowledge over a multitude of technologies (from Linux Kernel and Load Balancing to PHP, AWS S3, from container orchestration to MySQL/MariaDB and Elasticsearch)
• B2 English

Preferred qualifications

• 3+ years proven experience with configuration management tools (Ansible; Saltstack; Puppet; Chef etc)
• 1+ years proven experience with Kubernetes
• 3+ years proven experience managing clustered Linux servers
• 2+ years experience working in a team, on large GIT projects
• 3+ years proven experience with CI/CD tools (ideally Github Actions or similar tools like GitLab CI, Jenkins) with a monitoring tool (ideally Datadog or prometheus/grafana or kibana/elasticsearch)
• 2+ years proven experience managing Elasticsearch clusters
• 2+ years proven experience managing MySQL / MariaDB
• Proven experience troubleshooting complex issues [
• 3+ proven experience with at least one cloud provider (ideally AWS)
• 3+ proven experience with IaC tools (ideally Terraform)
• proven experience with RabbitMQ is a plus

YOUR PERSONALITY - BE A PART OF OUR RELENTLESS PIONEER STRATEGY:

• Communication: you like to share your knowledge with your colleagues and to document your work
• Curiosity:
• You want to find out the root cause of problems and fix them permanently
• You enjoy introducing innovations and implementing improvements
• You are interested in exciting current trends and technological developments in the cloud environment like Docker and Docker Swarm, Ansible, Continuous Integration, Continuous Deployment and AWS services
• Customer first: we are here to support our customers and do all in our power to help them
• Initiative and Ownership: you make it, you run it, you break it, you fix it

SOME GOOD REASONS TO JOIN OUR TEAM:

We offer you a versatile job with high personal responsibility and global challenging tasks. You can work in a professional, international working environment with flat hierarchies and short decision-making paths. We live a co-operative and respectful corporate culture with fun at work and room for own ideas. You have the chance to learn, d