Senior Backend Engineer – Real-Time Node.js/Kafka | 4-Day Week

Gramian Consulting Group; Lille; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Company restaurant

On-site gym facilities

Profit-sharing and participation

Job summary

Gramian Consultancy is seeking an experienced Senior Backend Engineer to join the Poker engineering team, focusing on designing, developing, and optimizing highly scalable microservices for a real-time gaming platform.

The role emphasizes distributed architectures, event-driven systems, and collaboration with infrastructure, data, security, and product teams. Onsite Paris-based CDI with a 4-day work week is offered.

Qualifications

• Experience building distributed backend systems for high-traffic platforms.
• Ability to design scalable microservices and APIs.
• Proficiency with databases and data modeling.

Responsibilities

• Design and evolve the architecture of distributed backend systems
• Develop highly available and scalable microservices
• Build and maintain APIs and data models
• Work on real-time event-driven systems with high throughput requirements
• Implement unit, integration, and end-to-end testing
• Participate in code reviews and technical discussions
• Deploy and maintain services in AWS environments
• Monitor, troubleshoot, and optimize platform performance
• Contribute to architecture and technical documentation
• Collaborate with Frontend, Data, Infrastructure, Security, and Product teams
• Significant experience in developing back-end services on a high-traffic platform (10K+ req/s)
• Significant experience with load balancing, high availability, scaling, caching, database, and storage issues
• Proficiency in event-driven distributed architectures
• Proficiency in Redis or Kafka (data structures, pub/sub, streams, pipelines)
• Proficiency in relational databases (MySQL or PostgreSQL), modeling, optimization, transactions, and locks
• Knowledge of JavaScript and the Node.js ecosystem is desirable (microservices rely on Node.js)
• Knowledge of the cloud environment
• DevOps culture (CI/CD, Docker, Observability)
• Mandatory academic background from CPGE scientifiques (Maths Sup / Maths Spé)
• Permanent full-time contract (CDI)
• 4-day work week
• Profit-sharing and participation programs
• Company restaurant
• On-site gym facilities
• Long-term growth opportunities
• Modern engineering culture focused on scalability and innovation

Skills

Distributed backend architecture

High-throughput systems

Backend development

AWS

Education

CPGE scientifiques (Maths Sup/Maths Spé)

Tools

Redis

Kafka

MySQL

PostgreSQL

Node.js

Docker

CI/CD

Job description

Gramian Consultancy is seeking an experienced Senior Backend Engineer to join the Poker engineering team, focusing on designing, developing, and optimizing highly scalable microservices for a real-time gaming platform.

The role emphasizes distributed architectures, event-driven systems, and collaboration with infrastructure, data, security, and product teams. Onsite Paris-based CDI with a 4-day work week is offered.