Senior Data Scientist, FinCrime

ARQ; New York (NY); Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Stock options

Discretionary performance bonus

Latest tools and technology

Office policy: 3-4 days in-office

Job summary

ARQ is seeking a Senior Data Scientist to build the intelligence layer behind its financial products. You will develop ML models that help detect fraud, prevent losses, and scale decisions across millions of customers in the Americas.

You will take problems from idea to production, partnering with Product, Engineering, and Operations to turn large datasets into impactful models. This is a high-impact role at ARQ.

Qualifications

• 5+ years of experience across Data Science, ML, Software Engineering, or related disciplines.
• Strong Python skills and experience with large-scale datasets.
• Proven experience deploying ML models in production.
• Strong understanding of supervised learning, especially classification.
• Experience with anomaly detection, fraud prevention, risk modeling, or related domains.
• Ability to translate business challenges into data-driven solutions.
• Experience working cross-functionally with Product, Engineering, and business stakeholders.
• Strong communication skills and a pragmatic approach to problem-solving.
• Comfortable operating in fast-moving environments with high ownership.

Responsibilities

• Design, build, and deploy machine learning models that solve financial crime and risk challenges.
• Work on fraud detection, chargeback prediction, anomaly detection, identity verification, and transaction monitoring.
• Transform ambiguous business problems into measurable ML solutions.
• Partner with Product and Operations to define requirements, success metrics, and decision frameworks.
• Analyze large datasets to identify patterns, opportunities, and risks.
• Build and maintain production-ready data pipelines and model-serving solutions.
• Monitor model performance and continuously improve accuracy, reliability, and impact.
• Collaborate with Data and Backend Engineering to operationalise ML at scale.
• Help shape the future of AI and ML capabilities across ARQ.

Skills

Python

Communication

Cross-functional collaboration

Problem solving

Business analytics

Job description

What We're Looking For

We are looking for a Senior Data Scientist to help build the intelligence layer behind ARQ's financial products. You'll work on some of our most important risk and financial crime challenges, developing machine learning models that help us detect fraud, prevent losses, and make better decisions at scale.

This is a highly impactful role where you'll take problems from idea to production — partnering with Product, Engineering, and Operations teams to turn large-scale datasets into models that directly influence customer and business outcomes.

You'll join a fast-growing team helping build the future of financial services for more than 2 million customers across the Americas.

What You'll Be Doing

• Design, build, and deploy machine learning models that solve real-world financial crime and risk challenges.


• Work on problems such as fraud detection, chargeback prediction, anomaly detection, identity verification, and transaction monitoring.


• Transform ambiguous business problems into measurable ML solutions.


• Partner closely with Product and Operations teams to define requirements, success metrics, and decision frameworks.


• Analyse large datasets to identify patterns, opportunities, and risks.


• Build and maintain production-ready data pipelines and model-serving solutions.


• Monitor model performance and continuously improve accuracy, reliability, and business impact.


• Collaborate with Data Engineering and Backend Engineering teams to operationalise machine learning at scale.


• Help shape the future of AI and machine learning capabilities across ARQ.

What You'll Need

• 5+ years of experience across Data Science, Machine Learning, Software Engineering, or related disciplines.


• Strong Python skills and experience working with large-scale datasets.


• Proven experience developing and deploying machine learning models in production environments.


• Strong understanding of supervised learning techniques, particularly classification problems.


• Experience with anomaly detection, fraud prevention, risk modeling, or related domains.


• Ability to translate business challenges into data-driven solutions.


• Experience working cross-functionally with Product, Engineering, and business stakeholders.


• Strong communication skills and a pragmatic approach to problem-solving.


• Comfortable operating in fast-moving environments with high ownership.

Nice To Have

• Experience in financial crime, fraud prevention, AML, risk, or payments.


• Experience in fintech, banking, or financial services.


• Backend engineering experience and familiarity with production systems.


• Experience building real-time decisioning or risk platforms.


• Familiarity with modern MLOps practices and model monitoring.

Benefits

• Competitive salary and benefits


• Stock options, so you own part of what you build


• Discretionary performance bonus


• The latest tools and technology


• A world-class team that will challenge and grow your skills


• The opportunity to help build the best fintech app in Latin America


• Office Policy: 3-4 days a week in-office