Sr. Data Scientist

Responsibilities

You will own the end-to-end development of personalization systems, including model architecture, feature engineering, and real-time serving. You will also partner with cross-functional teams to design experiments and shape the product roadmap for recommendation algorithms.

Requirements

Candidates must have experience with contextual bandits, reinforcement learning, and production-grade machine learning pipelines. Proficiency in Databricks or GCP, along with experience in e-commerce or retail environments, is required.

Skills

• Data science
• Personalization systems
• Machine learning
• Feature engineering
• Contextual bandits
• Reinforcement learning
• Python
• SQL
• Spark
• PyTorch
• Databricks
• GCP
• AWS
• LLMs
• Vector search
• A/B testing

Benefits

• Health insurance
• Dental insurance
• Vision insurance
• Flex time off
• Paid volunteer opportunities
• DEI celebrations
• Associate discount

About this role

Title of role: Senior Data Scientist
Location: Dublin, Ireland; Hybrid (2 days in the office required)
Approved Salary Range: €80,000 - €110,000
About the Role:
Rue Gilt Groupe is hiring a Senior Data Scientist to build and ship the personalization systems behind Rue La La, Gilt, and ShopSimon. You will own products end to end, not just the models behind them: from problem framing and success metrics through feature engineering, training, real-time serving, and monitoring, and see your work reach 50M+ members every day.
Flash sale off-price is one of the hardest settings in e-commerce for recommendations. Inventory is limited and short-lived, new products and boutiques launch daily, and cold start is the norm, not the edge case. If that sounds like a fun problem, we would like to talk.
Key Responsibilities:
Personalization at scale: Ranking and recommendation models that power product discovery across boutiques, product pages, and our AI shopping assistant
Core algorithms: Boutique sort, similar styles, complete the look, and real-time reranking that blends member intent with merchandising goals
Exploration and learning: Contextual bandits and adaptive strategies that adjust the experience to how each member likes to shop
Product and model ownership: Shape the roadmap and success metrics with Product, then build the production training and inference pipelines, batch and real-time, with the monitoring and reliability to match
Experimentation: Design offline evaluation and online A/B tests, and turn results into clear decisions with Product and Merchandising
GenAI where it helps: Use LLMs and embeddings where they improve recommendations, and expose models as tools the shopping assistant can call
Cross-functional impact: Partner with engineering, product, marketing, and merchandising teams, and present your work to leadership
Experience and Background Needed:
Contextual bandits, reinforcement learning, or cold-start techniques
Embeddings, two-tower or sequence models, and vector search
Databricks (MLflow, Unity Catalog, Model Serving) or GCP (Gemini Enterprise Platform)
Production LLM for inference, RAG, evaluation, or agent tool calling
E-commerce, retail, or fashion experience
Deriving insights from complex data through analysis and modeling
Our Stack:
Databricks, Python, SQL, Spark, PyTorch, GCP (Gemini Enterprise Platform), and AWS.
About the AI & Data Science Team
We are a small, senior team that owns the product, the science, and the production systems. There is no handoff between deciding what to build, building the model, and shipping it, so you carry your work from idea to launch. You will have the freedom to try new techniques, the data to test them, and a direct line from your work to member experience and revenue.
What Our Team Offers
Working at RGG is more than just a job; it’s an opportunity to join a mission-driven team that values Innovation and Impact. We are committed to supporting our employees' success and well-being:
Comprehensive Coverage: Robust health, dental, and vision insurance effective on the date of hire.
Time & Flexibility: Generous Flex Time Off (FTO) and flexible remote/hybrid work options that support a healthy work-life balance.
Culture: A supportive, inclusive culture that encourages innovation, safety, and creative risk-taking.
Community: Paid volunteer opportunities and regular DEI celebrations to foster a strong sense of community and collaboration.
Impact: The chance to make a real, measurable impact at a mission-driven, fast-growing company poised for major expansion.
The above statements are intended to describe the general nature and level of work being performed by employee(s) assigned to this job. They are not intended to be an exhaustive list of all responsibilities, duties and skills required of employee(s) assigned to this job. Rue Gilt Groupe reserves the right at any time, with or without notice, to alter or change job responsibilities, reassign or transfer job position or assign additional job responsibilities within your general skill set or capabilities. Rue Gilt Groupe is proud to be an Equal Opportunity workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
What We Offer:
Rue Gilt Groupe is a leading off-price e-commerce portfolio company, connecting the next-generation shopper to world-class brands. We’ve defined the online treasure hunt through our daily sale events, allowing a large, loyal member base to discover over 5,000 premium and luxury brands at prices up to 70% off full-price retail. Rue Gilt Groupe operates three complementary sites – Rue La La, Gilt, and Shop Premium Outlets.
Our vision at RGG is to spark delight through daily discovery – we make shopping an occasion to celebrate. At the forefront of fashion and technology, we’re also in the business of sparking delight for our Associates. We inspire each other, our Members, and ourselves to push past the expected – every day. Our culture is rooted in our values, and together we work to demonstrate being Kind, Passionate, Collaborative, Innovative, Tenacious and Empowered.
Rue Gilt Groupe is committed to providing Associates with equal pay for equal work and carefully considers a wide range of compensation factors, including but not limited to, prior experience, education, certification(s), license(s), skills and expertise, location, internal equity, and other factors that are job related and consistent with business need. Our goal is to support, reward and compensate the entire individual. Depending on role eligibility, your offer may also include bonus/commission, pension scheme, paid time off, medical, dental, vision and basic life insurance. Therefore, final offer amounts may vary from the amount stated.
We Encourage You to Apply:
At Rue Gilt Groupe, diversity enriches our pass...

About RUE GILT GROUPE

Retail · 501-1,000 employees · headquartered in Boston, Massachusetts