Company Description Cint is a global software leader in technology-enabled digital insights and research technology. Cint has one of the world's largest consumer networks for digital survey-based research, made up of over 239 million engaged respondents across more than 130 countries.

The Cint

Technology team is looking for a Staff Software Engineer to join our international Data Solutions & Measurement team. This position is for a software engineer who wants to raise the bar. Our ideal candidate will have 20% of the time influencing junior/mid-level engineers and 80% focused on complex problems.

You will work with no supervision, ensuring timely and high-quality delivery. You will communicate and work closely across 3 teams (Outcomes, Methodology & Recruitment) and with related areas like product and data science. Design, implement, scale, and maintain backend systems that process large volumes of data.

Build and optimize software for performance-sensitive workflows. Collaborate closely with data science and engineering colleagues on technical solutions. 10+ years of backend software engineering experience, with strong technical depth. ~ We're technology agnostic, so, you're more than welcome to switch your main language (Python, Scala, C/C++, Haskell, Elixir, Go, Ruby, etc...) to Java (our core language) ~ data structures (Anomaly Detection, Dynamic Routing, etc.),



Familiarity with heavy data processing tools and technologies such as Spark, Apache ecosystem tools, Delta Lake, Parquet, Kafka, and Avro. ~ Experience with Python and/or PySpark ~ Experience with Docker, SQL, and NoSQL databases. ~ Comfortable working in performance-oriented, production-critical environments with high-throughput & low talenty systems Ability to communicate well with engineers and data science partners. Computer science, computer engineering or a related field is preferred Experience with AWS, GCP or other cloud providers Experience with Pandas.

Experience with Spring framework and microservices.

Experience working in large-scale data or analytics environments. We're proud to be recognised in Newsweek's 2025 Global Top 100 Most Loved Workplaces®, reflecting our commitment to a culture of trust, respect, and employee growth. In June 2021, Cint acquired Berlin-based GapFish – the world's largest ISO certified online panel community in the DACH region – and in January 2022, completed the acquisition of US-based Lucid – a programmatic research technology platform that provides access to first-party survey data in over 110 countries.

Cint Group AB (publ), listed on Nasdaq Stockholm, this growth has made Cint a strong global platform with teams across its many integral offices, including Stockholm, London, New York, New Orleans, Singapore, Tokyo and Sydney. (

📌 Staff Software Engineer - Back End (Madrid)
🏢 Cint
📍 Madrid