Company Description

Who We Are

Cint is a pioneer in research technology (ResTech). 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 platform is built on a programmatic marketplace, which is the world’s largest, with nearly 300 million respondents in over 150 countries who consent to sharing their opinions, motivations, and behaviours.

We are feeding the world’s curiosity!

Job Description

The Role

We're hiring several AI/ML Engineers for the Synthetic Data Platform team. This is a greenfield project, an exciting new market and a key part of Cint’s 2026 product strategy. You will build models with a deep understanding of how respondents answer surveys. These will underpin new products which will be best-in-class for the industry, including:

Survey Augmentation: filling missing responses to surveys
Audience Profiling: predicting respondent characteristics from signals we have
Agentic Insights: answering a client’s research questions using insights from existing data

The Team

You'll join our AI/ML team in Prague, working alongside engineers on augmentation and profile modelling, the data science team, and a product manager who owns the Synthetic Data roadmap. Customer pilots are already running, and feedback from those pilots shapes the roadmap.

Qualifications

What You'll Do:

Build production augmentation and profile models: Design, train, evaluate, and deploy models against real survey data, owning the full path from experiment to production.
Innovate on solutions: We aim to build the best simulation of survey responses in the industry. You'll design the experiments, baselines, and models to get us there.
Use the latest technology: Build on the best open-weights LLMs with fine-tuning, build new ones from scratch with custom architectures or use third party models through an API; whatever gets us the best result.
Partner with Data Science: Work with the data science team to ensure integrity of our statistical testing and experiment framework.
Leverage AI tooling: Use Claude Code and agentic programming tools where appropriate.

What You Bring:

Excellent programming skills and be proficient in Python. Knowledge of Java is a plus.
Knowledge of traditional machine learning tools and techniques (support vector machines, gradient boosting)
An understanding of LLMs and their architecture, ideally with experience in fine-tuning, e.g. LoRA, distillation
Proficient in SQL, knowledge of Databricks is a plus
Familiarity with cloud technologies, e.g. AWS
Outstanding problem-solving and analytical skills
Knowledge of maths, probability, statistics and algorithms
You like to push the limits of your knowledge every day
You own your conclusions and are comfortable presenting them and shaping outcomes

Additional Information

Working at Cint

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

Our Values

Collaboration is our superpower

We uncover rich perspectives across the world
Success happens together
We deliver across borders.

Innovation is in our blood

We’re pioneers in our industry
Our curiosity is insatiable
We bring the best ideas to

AI/ML Engineer (Synthetic Data) at Cint