EQ
Equativ· HQ in France

Backend Engineer [Freelance]

Location: Paris · Category: Engineering & Development · Seniority: Mid-Level · Posted: April 30, 2026 · Verified: Oct 3, 2026

Role Overview & Description

This freelance Backend Engineer role on the Addressability team builds and queries a multi-billion entry ID graph for ad targeting. Responsibilities include high-performance data ingestion into key-value stores, sub-millisecond query processing, and integrating third-party data providers. Requires 3-4 years of low-latency C# expertise and experience with Aerospike or similar KV stores.
Source & Transparency: This position was structured directly from the publicly accessible career portal of Equativ. Details on the employer’s original job posting are authoritative. Polaris7 charges no placement fees and conducts no candidate screening.

About the company

EQ

Programmatic adtech platform spanning SSP, DSP, retail media and CTV.

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