Join the Credo family

Junior Machine Learning Researcher

Resistant AI

Resistant AI

Software Engineering
Prague, Czechia
Posted on Oct 12, 2025

Are you passionate about AI, machine learning, and cutting-edge technology? Do you thrive in collaborative environments and love tackling new challenges? If you're eager to learn and grow within a dynamic company, we might have the perfect opportunity for you!

About Us: We are Resistant AI, a trailblazing startup founded in 2019 by Martin Rehák and his team. Since our inception, we've ascended to the top echelons of Fintech companies specializing in artificial intelligence. Our accolades include "Digital Crime Fighter of the Year" (two consecutive wins) at the ACAMS Annual Conference in Las Vegas, and the Europas Awards for Hottest AI Startup. We take pride in our achievements and are driven to continue our success.

Our mission is to safeguard the AI and automation systems used in modern financial services from manipulation and attacks. By forensically analyzing everything from customer-submitted documents to user behaviors, we detect and prevent fraud, synthetic identities, account takeovers, money laundering, and emerging financial threats on a large scale. This is the second startup for our founding team, and we’ve successfully closed our Series A investment round led by Google Ventures, Index, and Credo Ventures. Learn more about us at Resistant AI.

We are seeking a talented on-site Junior Machine Learning Researcher in Prague (the location is mandatory). You will contribute to developing cutting-edge technologies that safeguard businesses and individuals from fraud in the new era of large language models. Your work will center on designing and implementing intelligent systems capable of detecting subtle modifications and fraudulent activities in digital documents. You will contribute to the full cycle of machine learning model development from research and design through implementation, evaluation, and deployment, applying advanced machine learning and deep learning techniques. You will help build solutions that ensure trust, security, and integrity in document processing.

Key Responsibilities

  • Algorithm Development & Research: Assist in the design and development of algorithms aimed at detecting modifications and anomalies in digital documents.
  • Machine Learning Model Engineering: Contribute to building, training, and evaluating machine learning models with a strong focus on fraud detection in document processing.
  • Deep Learning & Tools: Apply state-of-the-art frameworks such as PyTorch to develop and deploy scalable fraud detection models.
  • Data Management & Analysis: Work with large datasets of documents containing various fraud scenarios. Use preprocessing techniques such as cleaning, feature engineering, and augmentation to expose anomalies and strengthen model accuracy.
  • Fraud-Focused Research: Research and experiment with innovative methods to improve detection rates and minimize false positives, ensuring models are both robust and trustworthy.

What You Will Gain

This role provides an opportunity to grow and deepen your expertise in applied machine learning while directly impacting how organizations prevent fraud in the digital world. You will gain hands-on experience with advanced fraud detection systems, and work with state-of-the-art technologies in a collaborative and supportive environment.

Requirements

  • Strong foundation in machine learning concepts, with exposure to deep learning architectures.
  • Good communication and teamwork abilities in a collaborative environment.
  • At least 1 year hands-on experience with Python and familiarity with ML frameworks such as PyTorch.
  • Basic knowledge of data preprocessing techniques (cleaning, feature extraction, augmentation) and their impact on model performance.
  • Familiarity with version control tools such as Git and collaborative coding practices.
  • Optional experience with cloud technologies (AWS, GCP, Azure)

Why Join Us?

  • Be at the forefront of AI and machine learning innovation.
  • Work in a friendly, collaborative environment with a hybrid work model and excellent transport accessibility.
  • Grow your skills and contribute to the success of a company recognized for its groundbreaking work in Fintech.

Ready to embark on this exciting journey with us? Apply now and become a part of our mission to revolutionize financial security through AI!