Role Overview
Equativ is hiring a Back-End Engineer [Freelance]. This is a contract role in Paris. Part of Equativ's Backend hiring. Full responsibilities, required qualifications, and the apply link are listed in the description below.
Salary Context
Salary is not disclosed in this posting. Market median for Backend roles is $135k-$165k (based on 15 comparable listings). Many employers share specifics during the interview process or after an initial screen.
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Job description
đź‘« 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
đź’Ş 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!
About Equativ
Frequently Asked Questions
How do I apply for the Back-End Engineer [Freelance] position at Equativ?
Use the Apply button above to submit your application directly to Equativ. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Where is the Back-End Engineer [Freelance] position at Equativ located?
This position is based in Paris. Equativ has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.
What does a Back-End Engineer [Freelance] at Equativ earn?
Equativ has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Back-End Engineer [Freelance] role at Equativ posted?
This role was posted on April 30, 2026 (70 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
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