Senior Java/ Spring Backend Engineer (Synthetic Data/ AI Team)

Outstanding problem-solving and analytical skills

3+ years of hands-on professional backend software development experience, preferably in Java

Strong experience with Data Structures and Algorithms

Proven experience as a Software Developer in their previous roles

Experience building and operating production services, APIs and data pipelines at scale

Familiarity in SQL, knowledge of Databricks is a plus

You enjoy pushing the limits of your knowledge and experience every day

You own your conclusions and are comfortable presenting them and shaping outcomes

Nice to have: AWS, k8s, Spring, Kafka/Kinesis

Nice to have: exposure to AI/ML development, model libraries (XGBoost, LightGBM, CatBoost or similar) or LLMs — you don't need to build the models, but curiosity about them helps

Prague-First, Europe-Friendly: Our preferred base is Prague, alongside our existing AI/ML team. Remote work from Spain or the UK is also possible, as these are the markets where we have entities.

AI-Native Engineering: We're rolling out Claude Code and modern agentic tooling across engineering. You'll use it daily, not as a novelty, but as a force multiplier for the complex problems that matter.

High Autonomy: We trust our engineers to make sound decisions and own their work end-to-end.

Global Impact: Your work powers a marketplace used by millions of people worldwide.

Modern Tech Stack: We usually build our services using the latest Python tooling and FastAPI, dockerize them and deploy with CI/CD to K8s in AWS. We keep the code on GitHub.

Company Hardware: Cint provides a laptop (Win/Linux/Mac) and accessories, and a height adjustable desk at the Pankrác office

Benefits Include: Office in Prague (Pankrác) but full remote possible 25 days of vacation, unlimited sick days Pension fund contribution, Edenred meal vouchers

Office in Prague (Pankrác) but full remote possible

25 days of vacation, unlimited sick days

Pension fund contribution, Edenred meal vouchers

We uncover rich perspectives across the world

Success happens together

We deliver across borders.

We’re pioneers in our industry

Our curiosity is insatiable

We bring the best ideas to life.

We’re accountable for our work and actions

Excellence comes as standard

We’re open, honest and kind, always.

We learn from each other’s experiences

Stop and listen; every opinion matters

We embrace diversity, equity and inclusion.

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 global offices, including Stockholm, London, New York, New Orleans, Singapore, Tokyo and Sydney. (www.cint.com)

Additionally, in a world of AI, we want our candidates to understand our approach to the use of AI during the interview and hiring process, so we'd appreciate you reading our AI usage guide .