Company Description Our customers use the Cint platform to post questions and get answers from real people to build business strategies, confidently publish research, accurately measure the impact of digital advertising, and more.

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. Day-Day of a Staff Engineer in the DSM Team: 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.

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 talency 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 General 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 global offices, including Stockholm, London, New York, New Orleans, Singapore, Tokyo and Sydney. (

📌 Staff Software Engineer (Scala/Spark) (Madrid)
🏢 Cint
📍 Madrid