409,719open jobs
14,193companies
73,646added this week
Browse all
Salary
$45k – $64k per year
Location
Remote/Hybrid (Madrid, Spain)
Seniority
Senior
Employment
Full-Time
Overview
Company
Impact
Profile match
NielsenIQ is a consumer intelligence company whose retail measurement business traces back to the market research firm founded by Arthur Nielsen in 1923, and which was separated from Nielsen Holdings in 2021 when Advent International bought the connect division. It measures what shoppers buy across grocery, pharmacy, convenience and ecommerce channels, and sells that read of market share, pricing and promotion effectiveness to consumer goods manufacturers and retailers. The company merged with GfK in 2023, listed on the New York Stock Exchange in 2025, and operates in more than ninety countries from its base in Chicago.

At Digital Shelf by NIQ, we’re passionate about technological innovation and excellence in cybersecurity. Our cutting-edge solutions enable us to scrape data for 12 billion products and manage over 20 billion data points. In a market where anti-bot technologies represent a $10B industry in constant evolution and consolidation, our dedicated teams tackle real-world challenges with precision and creativity.

What You’ll Do

  • Reverse Engineering & Decompilation:

    Analyze web and mobile applications (APK/IPA) to uncover hidden mechanisms. Disassemble code to understand its inner workings, with a focus on cryptographic functions that secure our systems.

  • Overcoming Anti-Bot Mechanisms:

    Evaluate and bypass advanced security protocols such as TLS, HTTP/2, HTTP/3, WebSockets, DoH, and session management. Identify vulnerabilities to enhance our data extraction methods.

  • Developing Custom Tools:

    Build robust Python scripts and frameworks that automate bypass procedures and dynamically adjust security measures-whether by modifying TLS stacks or patching JavaScript on the fly.

  • Implementing Stealthy Scraping Techniques:

    Engineer sophisticated methods-such as browser patching, headless browser evasion, proxy tunneling, and human-behavior emulation-to keep our operations discreet.

  • Continuous Innovation:

    Regularly test, disrupt, and improve our tools to stay ahead of ever-evolving defenses.

Your Profile

  • P45510n4t3 C0d3 W4rr10r:

    You thrive on pushing systems to their limits while upholding the highest ethical standards. R3v3rs3 3ng1n33r1ng isn’t just a skill-it’s your creative playground.

  • R3v3rs3 3ng1n33r1ng Expertise:

    Whether using tools like IDA Pro, Ghidra, or your own custom-built solutions, you excel at dissecting both binary and web code to uncover core functionalities.

  • W3b & N3tw0rk Pr0t0c0l Savant:

    You possess deep expertise in pr0t0c0ls such as TLS, HTTP/2, WebSockets, DoH, and more, leveraging that knowledge to find innovative solutions.

  • Advanced Python Developer:

    Your coding abilities go far beyond basic scripting. We're looking for a true coder-someone who can design and implement robust, efficient solutions for complex challenges.

  • Collaborative Innovator:

    While you excel as an independent problem-solver, you also thrive in a dynamic team environment that values open communication and continuous learning.

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: https://www.nielseniq.com/global/en/ai-safety-policies.

About NIQ

NIQ 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

Want to keep up with our latest updates?

Follow us on: LinkedIn | Instagram | Twitter | Facebook

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 https://nielseniq.com/global/en/news-center/diversity-inclusion

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
409,719 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Similar stack
Same company
Madrid
In office • 5+ years exp
JavaScript
SQL
TypeScript
Node JS
Node JS
Prisma
Frontend
GraphQL
DevOps
CI/CD
Docker
Docker Compose
Git
GitHub
GitHub Actions
GitLab
GitLab CI
Jenkins
QA
Playwright
Selenium
Apply
In office • 2+ years exp
JavaScript
SQL
TypeScript
Node JS
Node JS
Prisma
Frontend
GraphQL
DevOps
CI/CD
Docker
Docker Compose
Git
Jenkins
QA
Playwright
Selenium
Apply
$42k – $159k per year (Estimated) • Remote • Contractor • 3+ years exp • Toronto
Kotlin
Node JS
SQL
Swift
PHP
JavaScript
Node JS
Nest.JS
PHP
Laravel
Databases
DynamoDB
MySQL
PostgreSQL
Redis
Frontend
Next.js
Vue.js
React.js
Mobile
React Native
DevOps
CI/CD
Git
GitHub
Rest API
Apply
$62k – $144k per year (Estimated) • Remote • Contractor • 4+ years exp • Toronto
Kotlin
Node JS
SQL
Swift
TypeScript
JavaScript
PHP
Node JS
Nest.JS
PHP
Laravel
Databases
DynamoDB
MySQL
PostgreSQL
Redis
Frontend
Bootstrap
Redux
Sass
Vue.js
React.js
Mobile
React Native
State Management
DevOps
Azure
CI/CD
Git
GitHub
Rest API
Apply
$18k – $47k per year (Estimated) • Remote/Hybrid • Full-Time • 5+ years exp • Pune
Python
TypeScript
JavaScript
Python
Django
FastAPI
Flask
Databases
FAISS
Pinecone
PostgreSQL
Weaviate
AI/ML
AI Agents
Anthropic
Claude
Cohere SDK
Embeddings
LangChain
LangGraph
LLM
Mistral
Model Context Protocol
OpenAI
Prompt Engineering
Frontend
Angular
DevOps
AWS
Azure
CI/CD
Docker
GCP
Git
Kubernetes
Rest API
Apply
In office • Full-Time • High School Diploma • Tijuana
Apply
AUDITOR DE CAMPO 2 days ago
In office • Full-Time • High School Diploma • Tijuana
Apply
AUDITOR DE CAMPO 2 days ago
In office • Full-Time • Delicias
Apply
AUDITOR DE CAMPO 2 days ago
In office • Full-Time • Chihuahua
Apply
$60k – $90k per year • Equity • Remote • Full-Time • 3+ years exp • Madrid
C++
JavaScript
Node JS
Python
Rust
Databases
PostgreSQL
Frontend
WebAssembly
DevOps
GitHub
KVM
Xen
Apply
Remote • 7+ years exp • Madrid
DevOps
Azure
Apply
$57k – $103k per year (Estimated) • Remote • 5+ years exp • Madrid
DevOps
Azure
Apply
Remote • Madrid
DevOps
Azure
Analytics
Power BI
Apply
Remote/Hybrid • Full-Time • Bachelor's Degree • Madrid
Apply
See all jobs
This is one of many
409,719 more open roles from verified company boards, updated every day.