Our partner is looking for a Senior Backend Engineer – Data Core based in Spain.
This is a senior backend engineering role focused on building the infrastructure that powers a large-scale creator data platform. You'll design and operate systems responsible for collecting and maintaining data on more than 400 million creator profiles across major social platforms. You'll have end‐to‐end ownership, from shaping ambiguous problems and designing architectures to deploying, monitoring, and continuously improving production systems. You'll work with high-volume data, third‐party APIs, proxy networks, and cloud infrastructure where small technical improvements can have a significant business impact. The environment is remote‐first, async‐oriented, collaborative, and designed to give senior engineers substantial autonomy.
Build and evolve backend systems responsible for collecting and maintaining 400M+ creator profiles across Instagram, TikTok, and YouTube.




Develop reliable collection infrastructure capable of processing billions of data points while maintaining appropriate levels of freshness, coverage, and data quality.
Improve the economics of large-scale data collection by optimizing requests, proxy usage, retries, storage, compute, and other infrastructure costs.
Own backend systems throughout their lifecycle, including requirements gathering, architecture, implementation, testing, deployment, monitoring, operation, and iteration.
Build strong observability, alerting, monitoring, and operational safeguards to identify collection failures, data‐quality issues, coverage gaps, and freshness regressions before they affect customers.
Work closely with data, search, product, and engineering teams to establish reliable interfaces and dependencies between systems.
Proven experience building large-scale backend or data systems where reliability, throughput, latency, scalability, and cost are important considerations.
Strong operational ownership, with experience using observabi

📌 Senior Backend Engineer (España)
🏢 Lever
📍 España