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We are looking for a proactive  Antifraud Analyst Middle to strengthen our Fraud Prevention team . This is a role focused on using and developing antifraud rules, analyzing fraud cases, and collaborating closely with agents to improve fraud detection and operational efficiency. If you have strong analytical thinking, hands-on analyst experience, and want to directly influence risk management and system logic, this is your opportunity to make a measurable impact on fraud prevention at scale.   Challenges that await you Your main responsibility will be to test and improve antifraud rules for existing products and new fraud scenarios related to products launching in 2026, balancing security and customer experience Optimize, and document antifraud rules across multiple channels (card, transfers, tokenization, etc.) Improve cost efficiency and controls for operational antifraud tools Collaborate with agents to investigate alerts, verify rule logic, and adjust thresholds Analyze confirmed fraud cases and identify new patterns or emerging risks Conduct back-testing and assess the efficiency of existing rules Propose and implement new approaches for fraud detection automation Monitor fraud metrics, build queries, and create dashboards to track performance What makes you a great fit 2+ years of relevant experience in fraud analysis, risk management, or a related field Strong knowledge of mathematical statistics and probability theory Analytical mindset and systematic thinking Strong skills in SQL for data analysis and Python for automation or modeling Analytical mindset, attention to detail, and ability to translate insights into actionable solutions Excellent communication skills for effective collaboration with cross-functional teams A mathematical or technical degree from a top university such as MSU, MIPT, HSE, MSTU, MEPhI, or NES will be a plus Understanding of payment processes, transaction flows, and fraud typologies will be a plus B1 or higher English level for effective communication with an international team Our ways of working: Innovative Spirit: A commitment to creativity and groundbreaking solutions Honest Feedback: valuing open, transparent communication Supportive Team: a strong, collaborative community Celebrating Achievements: recognizing our wins together High-Tech Environment: a team full of smart and revolutionary people who date to challenge the status quo of incumbent finances Our benefits: Relocation support to one of our hubs — Serbia, Mexico — with assistance for the employee and their family Flexible work from one of our offices or remote Healthcare Coverage Education Budget: Language lessons, professional training and certifications Wellness Budget: Mental health and fitness activity reimbursements Vacation policy: 20 days of annual leave and paid sick leave