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# Data Scientist II

- **Company:** Signifyd, Inc.
- **Location:** Belfast, UK (Remote available)
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** A/B Testing, Data Analysis, Build Automation, Distributed Data Store, Python (Programming Language), Machine Learning, Standard Sql, Apache Spark, Information Technology, Databricks
- **Published:** September 3, 2026
- **Apply:** https://www.careerjet.co.uk/job/gb13867c8768029bcae7a48130713225b4/eaa

## About the Role

* A degree in computer science or a comparable analytical field.
 * 3+ years of post-undergrad work experience required.
 * Strong verbal and written communication skills.
 * Strong machine learning and statistical background.
 * Write code and review others' in a shared codebase in Python.
 * Practical SQL knowledge.
 * Design experiments and collect data.
 * Experience with distributed analytics and data tooling such as Spark and Databricks.
 * This role has on-call shifts, as part of our weekend rotation, Fri/Sat/Sun. While the number of shifts is subject to change, currently it works out to about six weekends a year.

Nice to Have:

 * Previous work in fraud, payments, or e-commerce.
 * Data analysis in a distributed environment.
 * A passion for writing well-tested production-grade code.
 * Experience with AI coding agents and automation.
 * Experience of running A/B tests in production environments.
 * An advanced degree.

## Description

* Partner with the Business Unit Lead and their merchant portfolio to identify gaps in decisioning performance and implement solutions, with guidance from senior team members.
 * Utilize existing, or build net new production machine learning models that identify fraud, in collaboration with other data scientists and machine learning engineers.
 * Identify and build automation that reduces repetitive manual work.
 * Run experiments to identify optimal decisioning strategies, balancing complexity and performance.
 * Communicate complex ideas to a variety of audiences, from Customer Success and Sales, to limited interactions with external customers.
 * Write production and offline analytical code in Python.
 * Work with distributed data pipelines in Spark/Databricks/GCP.


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