Join the Credo family

Junior Software Engineer

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 Software Engineer in Prague (the location is mandatory). You'll be responsible for developing and maintaining high-quality software solutions that power and safeguard businesses and individuals from fraud in the new era of large language models. You'll work across the software development lifecycle from design and implementation to testing and deployment, ensuring that systems are efficient, scalable, and maintainable. This role offers a strong foundation in professional software engineering while giving you the opportunity to collaborate with experts working on advanced fraud detection technologies.

Key Responsibilities

  • Software Development: Design, implement, and maintain production-ready software components and services used in document processing systems.
  • Code Quality & Best Practices: Write clean, efficient, and testable code following industry standards and team guidelines.
  • System Integration: Contribute to the integration of internal tools, APIs, and third-party services to support product features.
  • Continuous Improvement: Participate in code reviews, technical discussions, and planning to learn and contribute to team growth.
  • Flexibility: Take on additional tasks as needed, supporting the team in achieving shared goals.

What You Will Gain

In this role, you’ll develop your skills as a professional Software Engineer while contributing to projects that support document security and reliability in the era of LLMs. You will gain hands-on experience with modern development practices, collaborate with talented engineers and researchers, and have the opportunity to explore advanced areas such as fraud detection and applied machine learning as you grow in your career.

Requirements

  • Solid programming skills in Python.
  • Good communication and teamwork abilities in a collaborative environment.
  • Familiarity with software development best practices such as version control with Git, testing, debugging and documentation.
  • Optional experience with cloud technologies (AWS, GCP, Azure), containerization tools (e.g. Docker) and working with large datasets or data preprocessing techniques.
  • Interest in fraud detection and basic knowledge of machine learning frameworks (e.g. PyTorch).
  • Familiarity with security or anomaly detection concepts is an advantage.

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!