Senior Data Scientist / AI Engineer Full-time

Company Description

Visa is a world leader in payments and technology, with over 259 billion payments transactions flowing safely between consumers, merchants, financial institutions, and government entities in more than 200 countries and territories each year. Our mission is to connect the world through the most innovative, convenient, reliable, and secure payments network, enabling individuals, businesses, and economies to thrive while driven by a common purpose – to uplift everyone, everywhere by being the best way to pay and be paid.

Make an impact with a purpose-driven industry leader. Join us today and experience Life at Visa.

Job Description

• Visa’s Technology Organization is a community of problem solvers and innovators reshaping the future of commerce. We operate the world’s most sophisticated processing networks capable of handling more than 65k secure transactions a second across 80M merchants, 15k Financial Institutions, and billions of everyday people. While working with us you’ll get to work on complex distributed systems and solve massive scale problems centered on new payment flows, business and data solutions, cyber security, and B2C platforms.
• The Opportunity:
• We are looking to hire a Data Scientist to lead the AI/ML initiatives in the Cybersecurity Products team. This position will be based out of Warsaw, Poland. In this role, you will:
• Be responsible for driving, designing, and building cutting edge innovation in the space of cybersecurity through Artificial Intelligence and Machine Learning – current scope of problems includes behavior biometrics, risk-based authentication, Account Takeover protection, advanced threat detection, smart incident response, AI model threat analysis, and many more.
• Drive the continued innovation and engineering of our existing behavior-based adaptive authentication product and bot/fraud protection product with a high-performance team of data scientists and engineers.
• Build innovative solutions and collaborate with engineering and product partners across the global Visa organization that help secure Visa against a variety of threats and attacks.
• Provide consultation to more experienced leaders in order to recommend solutions which solve security & other business challenges.
• You must have strong technical depth and experience in application of Machine Learning, Deep Learning, and Data Science techniques. On top of that, you should also have a genuine interest in cybersecurity and a desire to build solutions that deliver real impacts to the world. We will rely on your leadership to establish a roadmap and vision as this team engages in existing and new emerging areas.
• Support transfer technical knowledge to facilitate implementation of the business solution provided. Document all projects developed, including clear and efficient coding, and write other documentation as needed.
• Identify relevant market trends by country, based on a deep analysis of payment industry information. Interacting with several internal and external stakeholders for the strategic definition of analysis and initiatives. Continuously develop and present innovative ideas to improve current business practices within Visa.
• Essential Functions:
• Cyber Analytics Product: Research innovation in digital authentication using behavior biometrics capabilities, build applied AI based models and engineer them into the product called Visa Behavior Analytics. You will engage in data science and applied AI related activities for a Visa engineered product to protect against account takeover related threats, continuously enhancing it to combat threats in the secure authentication and perimeter defense space.
• Cyber/AI R&D: Research innovation in applying AI to the more general field of cybersecurity, including the protection with and against AI driven technologies, as well as the AI models themselves. You will be using your core competencies around AI and data science and help drive the teams to build models and solutions that work at scale, harnessing Petabytes of data while applying it to products that need to respond with cyber analytics in milliseconds.
• Influence & Collaborate: Be able to present results to a cross section of employees, including C-Level and other senior leadership at Visa. You will engage with internal technology, and cyber teams along with global product orgs. In addition, you will collaborate with colleagues in technology and product offices to establish effective, productive business relationships. This is a hybrid position. Hybrid employees can alternate time between both remote and office. Employees in hybrid roles are expected to work from the office 2-3 set days a week (determined by leadership/site), with a general guidepost of being in the office 50% or more of the time based on business needs.

Qualifications

Basic Qualifications:
• 2+ years of relevant work experience and a Bachelor’s degree, OR 5+ years of
relevant work experience.

Preferred Qualifications:
• 3 or more years of work experience with a Bachelor’s Degree or more than 2
years of work experience with an Advanced Degree (e.g. Masters, MBA, JD,
MD).
• 3+ years of experience in modern data mining and data science techniques
(e.g., regressions, decision trees, ensemble algorithms, neural networks, time
series analytics, clustering, anomaly detection, text analytics, etc.).
• Candidates with a PhD in a quantitative field, such as Statistics, Mathematics,
Operational Research, Computer Science, Economics, or engineering preferred.
• Experience in developing and deploying products using Docker, Kubernetes,
and the containerization technology stack.
• Experience in development of advanced machine learning and deep learning
models such as RNN, LSTM, Graph Neural Networks.
• Experience and proficiency in working with large language models (LLMs), and
familiarity with the associated solution architecture and infrastructure,
including Nvidia GPUs.
• Experience in leading, building, and supporting scalable and reliable AI/ML-
powered systems, enabling rapid prototyping and advanced analytics using
modern big data and AI/ML technologies (e.g., Spark, Kafka, TensorFlow,
PyTorch) in an agile environment.
• Software Engineering background: The candidate must be proficient in Python
and at least one object-oriented programming language (Java, Golang, C++,
etc.) Golang experience is desired. Candidate must possess software
engineering skills and be able to take end-to-end ownerships of analytical
models.
• Data Wrangling: The candidate must have proficient data wrangling skills with
Python, SQL, and other data processing tools/scripts.
• Experience with the end-to-end machine learning lifecycle and MLOps,
including data preprocessing and feature extraction, model training and
evaluation, deployment, and monitoring of AI models in production
environments.
• Experience working with Docker in both development and deployment
workflows, ensuring smooth transitions from development to production
environments.
• Distributed Systems: practical experience with NoSQL data platforms (e.g.,
Cassandra, Lakehouse, DynamoDB) and caching technologies like Redis is a
plus.
• A solid understanding of the Linux networking subsystem, contributing to the
stability and performance of deployed AI/ML systems.
• A solid understanding of the web applications and APIs, contributing to the
front-end accessibility and integration of AI-driven solutions.
• Cloud domain: Familiarity with infrastructure and analytics services on cloud
(e.g., AWS, Azure) is a plus.
• Domain Knowledge – Candidate with background in one or multiple of the
following domains is a plus: Cybersecurity, AI security/privacy research and
Biometrics

Additional Information

Visa is an EEO Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.