Antifraud Scientist (RU)

Work format: Almaty · office · 6 days a week

ABOUT THE COMPANY

Higgsfield AI is the fastest-growing AI company in history: $1B annual revenue (ARR), 35M+ users worldwide.

Our goal is not just to be successful, but to grow faster than anyone else, to be the first to create and adopt the best solutions and playbooks.

Only winners and independent specialists feel comfortable in our team. If you want to receive a lot of responsibility and take a task from start to finish – join us.

📍 Almaty · Office work · Relocation

3+ years in DS/ML with models in production. Remote format is not provided.

ABOUT THE TEAM

Antifraud at Higgsfield AI is responsible for detecting fraud during registration, payment, and product usage. We work with user behavior, transactions, and account connections, interacting with analysts, product, and development teams. We are looking for a specialist who combines research work with the analysis of real cases and knows how to bring models to production.

WHAT YOU WILL DO

• Develop real-time risk assessment models for registrations and payments, working on scoring quality and decision-making speed.
• Research fraudulent scenarios, independently analyze cases, and formulate hypotheses about new features and detection methods.
• Build connection graphs between accounts, find clusters and farms, and assess the resilience of detection to behavioral changes.
• Work with severe class imbalance, incomplete and delayed labeling, and account for data leakage when preparing datasets.
• Train and validate models, select thresholds considering prevented losses, cost of errors, and impact on legitimate users.
• Implement models and features into production in collaboration with development, monitor calculation stability and reproducibility.
• Set up model quality and data drift monitoring, investigate degradations, and update models as new scenarios emerge.
• Evaluate the monetary effect of models and rules, compare approaches on historical data and in controlled launches.

REQUIREMENTS

• 3+ years of experience in Data Science or ML, including models deployed in production.
• Strong proficiency in Python and SQL, experience in feature engineering and working with large volumes of event or transactional data.

🎯 YOUR TASK

Build real-time scoring for registrations and payments. Identify account farms through connection graphs, deploy models to production, and estimate prevented losses.

🧠 WHO WE ARE LOOKING FOR

3+ years in DS/ML with models in production. Python, SQL, boosting, graphs, and experience with class imbalance. A researcher who analyzes cases independently and brings models to completion.

📌 WE OFFER

• Salary in USD + stock options

• AI product with 35M+ users

• Models in production with an impact on prevented losses

• Full cycle: from research to model implementation

• Practical experience with gradient boosting and classification models.

• Understanding of working with class imbalance, time-based validation, metric and threshold selection, and data leakage risks.

• Knowledge of graph analysis and clustering methods for identifying connected entities.

• Ability to link model quality to business impact and the cost of false positives.

• Willingness to independently investigate suspicious cases and test hypotheses on raw data.

• Ability to bring research to a working solution and adapt to changing fraudster behavior.

WILL BE A PLUS

• Experience in antifraud, transactional risk, Trust & Safety, or ad antifraud.
• Experience in detecting account farms and coordinated behavior using graphs.
• Experience with real-time scoring, model monitoring, and working with feedback from investigations.

WHAT WE OFFER

• 💵 Competitive base salary in USD, considering experience, skills, and role level.
• 📈 Participation in the company's stock option program.
• 🎯 High autonomy: you take ownership of your area, choose your approach, and bring solutions to implementation.
• 🧩 Flat structure, direct interaction with an experienced team, and influence on product and business decisions.
• 🚀 Professional growth and expanded responsibilities as the company develops.
• 🛠️ Equipment, meals, transportation, and other office benefits covered by the company.
• ✈️ Relocation support to Almaty for candidates from other cities and countries: flight and temporary accommodation.

APPLY

💬 Telegram — recruiter contact