Senior Data Scientist - Fraud

Mercury; Poland; Remote; PLN 604,000 - 757,000; Full time

Job summary

A leading financial technology firm is seeking a Data Scientist to join the Fraud and Limits team. This role focuses on detecting fraud and ensuring a smooth banking experience. Candidates should have over 5 years of experience in data analysis, proficiency in SQL and Python, and experience in deploying machine learning models. The position offers competitive compensation and a chance to work on critical projects in an evolving environment.

Qualifications

• 5+ years of experience analyzing large datasets.
• 1+ years of relevant domain experience.
• Experience deploying machine learning models.

Responsibilities

• Develop dashboards to track fraud metrics.
• Conduct analyses to understand fraud trends.
• Build machine learning models for real-time fraud prevention.

Skills

Data analysis

SQL proficiency

Python programming

Machine learning

Job description

Overview

Mercury is building the financial stack for startups. We’re here to make banking intuitive, powerful, and safe for entrepreneurs and businesses of all sizes. We started by imagining what the best banking platform for startups would look like, and several years later we have hundreds of thousands of customers using Mercury’s products. As we continue to scale, protecting our customers and Mercury from fraud while still ensuring the seamless customer experience we have come to be known for is critical.

We are hiring a Data Scientist to join our Fraud and Limits team. This team is responsible for detecting, monitoring, and mitigating both first-party fraud (fraudulent applicants) and account takeover (ATO). You’ll play a key role in strengthening our fraud defenses while ensuring that Mercury continues to deliver a smooth and trustworthy banking experience.

This is an opportunity to join Mercury at a pivotal moment in our growth. You’ll be working on some of the most critical challenges facing the business and collaborating across product, engineering, and risk to protect our customers and the financial system at large.

Responsibilities

• Develop dashboards and monitoring systems to track key fraud and account health metrics.
• Conduct deep-dive analyses to understand fraud trends and behaviors, and translate findings into actionable recommendations.
• Build, validate, and deploy machine learning models to identify and prevent fraud in real time.
• Support ad hoc investigations and ensure data quality and reliability across pipelines and tools.
• Collaborate with Risk Strategy and Engineering to optimize rules, scoring systems, and other fraud defenses.
• Partner with cross-functional teams (Engineering, Product, Design, Operations) to embed data insights into decision-making.

Requirements

• 5+ years of experience working with and analyzing large datasets to solve problems and drive impact, with 1+ years of relevant domain experience.
• Proficiency in SQL and experience using it to understand and manage imperfect data.
• Proficiency in Python and experience with statistical modeling and machine learning.
• Experience deploying and monitoring machine learning models in production.
• The ability to balance high-leverage projects with foundational work such as reporting, dashboarding, and exploratory analyses.
• Comfort working in a fast-paced environment with evolving priorities.

Ideally you also have

• Experience building zero-to-one solutions in ambiguous or greenfield problem spaces.
• Familiarity with LLMs or other GenAI and how they can be applied to risk or fraud detection.
• Experience with modern data tools for pipelines and ETL (e.g., dbt).

Compensation and Benefits

The total rewards package at Mercury includes base salary, equity (stock options), and benefits. Our salary and equity ranges are highly competitive within the SaaS and fintech industry and are updated regularly using the most reliable compensation survey data for our industry. New hire offers are made based on a candidate’s experience, expertise, geographic location, and internal pay equity relative to peers.

Our target new hire base salary ranges for this role are the following:

• US employees (any location): $166,600 - 208,300 USD
• Canadian employees (any location): CAD 157,400 - 196,800

*Mercury is a financial technology company, not a bank. Banking services provided through Choice Financial Group, Column N.A., and Evolve Bank & Trust, Members FDIC.

Mercury values diversity & belonging and is proud to be an Equal Employment Opportunity employer. All individuals seeking employment at Mercury are considered without regard to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation, or any other legally protected characteristic. We are committed to providing reasonable accommodations throughout the recruitment process for applicants with disabilities or special needs. If you need assistance, or an accommodation, please let your recruiter know once you are contacted about a role.

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