NielsenIQ

Senior Software Engineer (Web Scraping, Data acquisition, Data collection)

NielsenIQ
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1 day ago
Madrid, SpainSenior

Responsibilities

  • Design and build distributed scraping architectures that scale across thousands of domains.
  • Reverse engineer APIs and mobile applications using traffic-inspection and debugging tools.
  • Detect and address anti-bot measures, including JavaScript checks and browser-behavior detection.
  • Lead technical innovation, prototype new scraping approaches, identify edge cases, and share knowledge.
  • Set up anomaly detection and monitoring to identify scraping blockers and failures early.
  • Collaborate with Customer Success, Operations, and Data teams to deliver high-quality actionable data.

Requirements

  • At least 5 years of experience with Python and large-scale scraping projects.
  • Deep understanding of anti-bot technologies, fingerprinting, WAFs, JavaScript challenges, and bypass techniques.
  • Experience with Scrapy, Requests, httpx, Selenium, Playwright, or custom headless browser drivers.
  • Experience handling residential, datacenter, and rotating proxies, session management, cookie injection, and TLS tuning.
  • Strong debugging skills across browsers, HTTP traffic, and device-level interactions.
  • Familiarity with Parquet, Avro, or real-time stream processing.
  • Knowledge of MongoDB, InfluxDB, and Redis, including database optimization.
  • Bonus: experience with real-device simulation, distributed task queues such as Celery or Kafka, high-security or mobile-first platforms, Linux, AWS, GCP, Kubernetes, Cloud Run, or Cloud Functions.

Benefits

  • Flexible working environment and flexible hours.
  • Volunteer time off.
  • LinkedIn Learning.
  • Employee Assistance Program.
  • Competitive salary and opportunities for rapid growth.

Tech Stack

Categories

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