Senior Software Engineer (Web Scraping, Data Acquisition, Data Collection)

Nielseniq; Barcelona; Presencial; EUR 85.000 - 125.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible working environment

Volunteer time off

LinkedIn Learning

Employee-Assistance-Program (EAP)

Descripción de la vacante

NielsenIQ Barcelona busca un/a Senior Software Engineer para desarrollar y escalar soluciones de scraping web y adquisición de datos. Formarás parte de un equipo global de scraping, I&D y analistas, trabajando en pipelines distribuidos capaces de procesar miles de dominios y grandes volúmenes de datos para clientes líderes.

Se valoran experiencia en Python, Scrapy/Playwright/Selenium, manejo de proxies y tecnologías anti-bot, con enfoque en innovación y monitoreo de rendimiento.

Formación

• 5+ años de experiencia con Python y proyectos de scraping a gran escala.
• Conocimiento profundo de tecnologías anti-bot y cómo eludirlas, fingerprinting, WAFs, desafíos de JavaScript.
• Experiencia trabajando con Scrapy, Requests, Selenium, Playwright o drivers de navegadores sin cabeza.
• Capacidad para gestionar proxies (residenciales, centros de datos, rotación), gestión de sesiones, inyección de cookies y TLS.
• Fuertes habilidades de depuración a través de navegador, tráfico e interacciones a nivel de dispositivo.

Responsabilidades

• Diseñar y construir arquitecturas de scraping distribuidas que escalen en miles de dominios.
• Reverse engineer APIs y apps móviles usando Frida, mitmproxy, Charles Proxy, Burp y otros.
• Detectar medidas anti-bot comunes y adaptar tus crawlers para parecer más humanos.
• Liderar la innovación técnica en scraping: identificar edge cases, prototipar enfoques nuevos y compartir conocimiento.
• Configurar detección de anomalías y monitoreo para detectar bloqueos o fallas temprano.

Conocimientos

Python

Large-scale scraping

Anti-bot technologies

Scrapy

Requests

Selenium

Playwright

Proxies management

TLS tweaking

Debugging

Parquet

Avro

MongoDB

InfluxDB

Redis

Kubernetes basics

Herramientas

Frida

mitmproxy

Charles Proxy

Burp Suite

Descripción del empleo

Senior Software Engineer (Web Scraping, Data acquisition, Data collection) NielsenIQ Barcelona, barcelonés (comarca); provincia de barcelona; cataluña, Spain

Descripción del trabajo

Company DescriptionAt NIQ Digital shelf, scraping isn't just about collecting data, it's about outsmarting the obstacles that stand in the way of visibility. Every day, we process tens of billions of data points from thousands of sources, both web and mobile, and transform them into actionable insights for the world's top retailers and brands.You'll join a team of 60+ scrapers, engineers, analysts, and data lovers from across the globe. As part of our scraping and R&D team, you'll have space to experiment, push boundaries, and bring bold ideas to life. You'll collaborate closely with Customer Success, Operations, and Data to ensure we extract high-quality, actionable data — fast and at scale.This isn't just a coding job. You'll need to think like a hacker, move like an engineer, and act like an inventor

Job Description

• Design and build distributed scraping architectures that can scale across thousands of domains.
• Reverse engineer APIs and mobile apps using tools like Frida, mitmproxy, Charles Proxy, burp and many more.
• Detect common anti-bot measures (like JavaScript checks or browser behavior detection) to build crawlers that adjust to appear more human-like.
• Lead technical innovation in scraping: identify edge cases, prototype new approaches, and share knowledge with the team.
• Set up anomaly detection and monitoring to detect blockers or failures early.

Qualifications

What You Bring

• 5+ years of experience with Python and large-scale scraping projects.
• Deep understanding of anti-bot technologies and how to bypass them, fingerprinting, WAFs, JavaScript challenges, etc.
• Experience working with Scrapy, Requests, Selenium, Playwright, or custom headless browser drivers.
• Skilled at handling proxies (residential, datacenter, rotating), session management, cookie injection, and TLS tweaking.
• Strong debugging skills across browser, traffic, and device-level interactions.
• You think independently and enjoy solving problems no one has solved before.
• Familiarity with structured storage formats (Parquet, Avro), or real-time stream processing.
• Good knowledge of databases like MongoDB, InfluxDB, and Redis, including how they work and how to optimize them.

Bonus Skills

• Experience with real-device simulation for mobile scraping.
• Comfortable building and maintaining distributed task queues (Celery, Kafka, etc.).
• Experience scraping high-security platforms or mobile-first environments.
• Exposure to Linux or cloud environments (AWS, GCP, etc.).
• Basic understanding of Kubernetes, Cloud Run, and Cloud Functions to deploy and orchestrate scraping workloads.

Additional Information

Why Join NIQ Digital shelf

Our Benefits

• Flexible working environment
• Volunteer time off
• LinkedIn Learning
• Employee-Assistance-Program (EAP)

NIQ may utilize artificial intelligence (AI) tools at various stages of the recruitment process, including résumé screening, candidate assessments, interview scheduling, job matching, communication support, and certain administrative tasks that help streamline workflows. These tools are intended to improve efficiency and support fair and consistent evaluation based on job-related criteria. All use of AI is governed by NIQ's principles of fairness, transparency, human oversight, and inclusion. Final hiring decisions are made exclusively by humans. NIQ regularly reviews its AI tools to help mitigate bias and ensure compliance with applicable laws and regulations. If you have questions, require accommodations, or wish to request human review were permitted by law, please contact your local HR representative. For more information, please visit NIQ's AI Safety Policies and Guiding Principles: NIQNIQ is the world's leading consumer intelligence company, delivering the most complete understanding of consumer buying behavior and revealing new pathways to growth. In 2023, NIQ combined with GfK, bringing together the two industry leaders with unparalleled global reach. With a holistic retail read and the most comprehensive consumer insights—delivered with advanced analytics through state-of-the-art platforms—NIQ delivers the Full View. NIQ is an Advent International portfolio company with operations in 100+ markets, covering more than 90% of the world's population.For more information, visit NIQ.com

Our commitment to Diversity, Equity, and Inclusion

At NIQ, we are steadfast in our commitment to fostering an inclusive workplace that mirrors the rich diversity of the communities and markets we serve. We believe that embracing a wide range of perspectives drives innovation and excellence. All employment decisions at NIQ are made without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, marital status, veteran status, or any other characteristic protected by applicable laws. We invite individuals who share our dedication to inclusivity and equity to join us in making a meaningful impact. To learn more about our ongoing efforts in diversity and inclusion, please visit the SummaryType: Full-timeFunction: General BusinessExperience level: Mid-Senior LevelIndustry: Market Research