Back-End Engineer [Freelance]

Equativ; Paris; Sur place; EUR 65 000 - 90 000; Plein temps

Résumé du poste

Equativ is seeking a backend engineer to join the Addressability team and help build a billion-entry Id Graph, integrate third-party data, and deliver advanced targeting and reporting capabilities. You will work with back-end developers and data engineers across locations, focusing on scalable data ingestion and fast query performance.

The role emphasizes leading design discussions, mentoring teammates, and delivering clean, customer-oriented solutions while communicating effectively in English.

Qualifications

• 3-4 years of seniority in high perf, low latency C# coding.
• Expertise of Aerospike or equivalent high performance KV store.
• Experience with Event streaming (Kafka), Go, PHP, Docker, Kubernetes, Cloud platforms (ideally GCP) is a big plus.
• Able to lead design discussions and mentor others.
• Customer oriented approach: you deliver clean and usable solutions for customers (and you know that customers hate bugs!).
• Proficient in verbal and written English.
• Passion for writing high quality and maintainable code following Software Craftsmanship or Continuous Delivery.
• Entrepreneurial spirit and know-how to identify opportunities of improvement.
• Personal projects with code sharing, we’re curious about your art!

Responsabilités

• Ingestion of massive amounts of data high performance key value stores
• Query user data millions of times per second with a response time of a few ms
• Improvement of our graph by making it sharper, faster
• Design trade offs (feature vs performance)
• Business support on external partners' and customers

Connaissances

C# coding

Low-latency

English communication

Mentorship

Software craftsmanship

Entrepreneurial spirit

Code optimization

Customer oriented

Outils

Kafka

Go

PHP

Docker

Kubernetes

GCP

Description du poste

About the team

At Equativ, we’re on a mission to develop advertising technologies that empower our customers to reach their digital business goals. This means that we rely on massively scalable, widely distributed, highly available, and efficient software systems; the platform deals with over 3 million requests per second (+250 billion/day) managed by 3,000 servers with less than 250ms response time.

Our innovation team based in Paris, Nantes, Bordeaux, Limoges, Krakow and Berlin is composed of 150+ straightforward and energetic engineers working in an Agile environment and ready to tackle the most complex technical challenges.

Your mission

You will join our Addressability team distributed in multiple locations. You will be onboarded in a multi expertise feature team of back-end developers and Data Engineers, with the mission to build and query a multi billion entry Id Graph, plug third party data providers and provide customers and business teams with advanced targeting and reporting features.

What you'll do

• Ingestion of massive amounts of data high performance key value stores
• Query user data millions of times per second with a response time of a few ms
• Improvement of our graph by making it sharper, faster
• Design trade offs (feature vs performance)
• Business support on external partners' and customers

About you

• 3-4 years of seniority in high perf, low latency C# coding
• Expertise of Aerospike or equivalent high performance KV store
• Experience with Event streaming (Kafka), Go, PHP, Docker, Kubernetes, Cloud platforms (ideally GCP) is a big plus
• Able to lead design discussions and mentor others
• Customer oriented approach: you deliver clean and usable solutions for customers (and you know that customers hate bugs!)
• Proficient in verbal and written English
• Passion for writing high quality and maintainable code following Software Craftsmanship or Continuous Delivery
• Entrepreneurial spirit and know-how to identify opportunities of improvement
• Personal projects with code sharing, we’re curious about your art!

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.