Senior Data Science Analyst – Advanced Recommendation Systems, A/B Testing & Machine Learning Innovation (Remote – Boston, USA)

About arenaflex

arenaflex is a global leader in online retail, delivering millions of products to customers worldwide through a seamless blend of technology, design, and logistics. Our mission is to inspire people to create a home they love, and we achieve this by harnessing the power of data to drive personalized experiences at scale. As a data‑driven organization, arenaflex invests heavily in cutting‑edge analytics, artificial intelligence, and experimentation platforms that empower teams to turn massive data sets into actionable insights. Joining arenaflex means becoming part of a vibrant community of innovators who are passionate about solving complex problems, shaping the future of e‑commerce, and delivering tangible value to both customers and partners.

Why This Role Matters

The Senior Data Science Analyst position sits at the heart of arenaflex’s Search & Recommendations team. This team is responsible for designing, testing, and refining the algorithms that suggest products to shoppers across all touchpoints. Your work will directly influence the relevance of recommendations, the efficiency of A/B testing pipelines, and the overall satisfaction of millions of users. By collaborating with product managers, engineers, and designers, you will help shape the strategic direction of arenaflex’s recommendation engine, ensuring it remains at the forefront of the industry.

Key Responsibilities

Strategic Experimentation & Analysis

• Design, implement, and analyze large‑scale A/B experiments for new recommendation algorithms, ensuring statistical rigor and clear business impact.
• Develop and maintain robust experimentation frameworks that enable rapid iteration while safeguarding data integrity.
• Identify, monitor, and report on key performance indicators (KPIs) such as click‑through rate, conversion rate, average order value, and user engagement metrics.
• Build automated dashboards and alerting systems to surface anomalies and trends in real time.

Exploratory Data Analysis & Insight Generation

• Conduct deep exploratory analyses (e.g., clustering, segmentation, cohort analysis) to uncover hidden patterns in user behavior and product interactions.
• Translate complex data findings into clear, actionable recommendations for product and engineering stakeholders.
• Collaborate with cross‑functional teams to prioritize insights that drive the most value for the business.

Model Development & Productionization

• Develop, evaluate, and iterate on machine‑learning models (e.g., decision trees, random forests, deep learning architectures) that power personalized recommendations.
• Partner with software engineers to integrate models into arenaflex’s production pipelines, ensuring scalability, low latency, and reliability.
• Implement rigorous validation procedures, including offline metrics, online A/B testing, and post‑deployment monitoring.

Tooling & Automation

• Design and build internal tools that streamline data extraction, feature engineering, and model evaluation.
• Maintain a suite of reusable Python libraries (e.g., pandas, scikit‑learn, PyTorch) and SQL scripts that accelerate team productivity.
• Contribute to the continuous improvement of arenaflex’s data infrastructure, including data warehouses (Vertica, Hive) and data‑lake solutions.

Collaboration & Communication

• Partner closely with product managers to align analytical work with roadmap priorities and business objectives.
• Work hand‑in‑hand with AI engineers to translate research prototypes into production‑ready solutions.
• Present findings and strategic recommendations to senior leadership, tailoring communication style to both technical and non‑technical audiences.
• Mentor junior analysts and data scientists, fostering a culture of knowledge sharing and continuous learning.

Essential Qualifications

• Minimum 2 years of professional experience in a data‑science or analytics role, preferably within an e‑commerce or technology‑driven environment.
• Bachelor’s degree in Computer Science, Statistics, Mathematics, Engineering, or a related quantitative field (advanced degree is a plus).
• Deep, hands‑on expertise with SQL—including complex queries, performance tuning, stored procedures, and data extraction from platforms such as Vertica, Hive, or Snowflake.
• Proficiency in Python and its data‑science ecosystem (Jupyter notebooks, pandas, NumPy, scikit‑learn, matplotlib, seaborn, etc.).
• Demonstrated experience designing and executing A/B tests, interpreting results, and translating them into product decisions.
• Strong analytical mindset with the ability to synthesize large data sets into clear, concise insights.
• Excellent written and verbal communication skills, with a collaborative, team‑first attitude.

Preferred Qualifications & Nice‑to‑Have Skills

• Experience applying machine‑learning algorithms (e.g., gradient boosting, deep neural networks) to real‑world recommendation problems.
• Familiarity with big‑data processing frameworks such as Spark or Hadoop.
• Background in statistical modeling, causal inference, or econometrics.
• Exposure to cloud platforms (AWS, GCP, Azure) and containerization technologies (Docker, Kubernetes).
• Track record of publishing research or contributing to open‑source data‑science projects.
• Prior experience working in fast‑paced, agile product teams.

Core Skills & Competencies

• Analytical Rigor: Ability to formulate hypotheses, design experiments, and draw statistically sound conclusions.
• Technical Acumen: Mastery of data manipulation, feature engineering, and model evaluation techniques.
• Business Insight: Understanding of e‑commerce metrics and how data science drives revenue, retention, and customer satisfaction.
• Collaboration: Proven ability to work across disciplines, influence stakeholders, and build consensus.
• Problem‑Solving: Creative thinker who can navigate ambiguous problems and propose innovative solutions.
• Adaptability: Thrive in a dynamic environment where priorities shift quickly and new challenges emerge daily.

Career Growth & Learning Opportunities

arenaflex is committed to the professional development of its employees. As a Senior Data Science Analyst, you will have access to:

• Mentorship from senior leaders in data science, AI research, and product strategy.
• Sponsored attendance at industry conferences, workshops, and certification programs.
• Opportunities to lead high‑visibility projects that directly impact the company’s bottom line.
• Cross‑functional rotations that broaden your skill set and expose you to new domains such as supply chain analytics, marketing attribution, and fraud detection.
• A vibrant internal community of data practitioners who share best practices, host hackathons, and organize knowledge‑sharing sessions.

Work Environment & Culture at arenaflex

Our culture is built on three pillars: Innovation, Inclusion, and Impact.

• Innovation: We encourage curiosity and experimentation. Failure is viewed as a learning opportunity, and every team member is empowered to propose bold ideas.
• Inclusion: arenaflex fosters a diverse workplace where all voices are heard. We provide accommodations for individuals with disabilities and actively promote equitable opportunities.
• Impact: Your work will touch millions of shoppers worldwide. We celebrate successes, recognize contributions, and reward outcomes that move the business forward.

Our Boston office offers a hybrid model—flexible remote work combined with collaborative in‑person days. The workspace is designed for comfort and creativity, featuring open‑plan areas, quiet zones, and state‑of‑the‑art meeting rooms equipped with video‑conferencing technology.

Compensation, Perks & Benefits

arenaflex offers a competitive total rewards package that includes:

• Base salary commensurate with experience (approximately $27 per hour for this role, with performance‑based bonuses).
• Comprehensive health, dental, and vision insurance plans.
• 401(k) retirement plan with company matching contributions.
• Generous paid time off, parental leave, and flexible holiday schedules.
• Professional development stipend, tuition reimbursement, and access to an internal learning platform.
• Employee assistance programs, wellness initiatives, and on‑site fitness facilities.
• Transportation benefits, commuter subsidies, and a modern office equipped with ergonomic workstations.

Commitment to Accessibility

arenaflex is dedicated to providing equal employment opportunities to all individuals, including those with disabilities. We will make reasonable accommodations for qualified applicants with disabilities unless doing so would cause an undue hardship on the operation of our business. If you require assistance during the application or interview process, please let us know.

How to Apply

If you are excited about leveraging data to shape the future of online shopping, we want to hear from you. Click the link below to submit your application, resume, and a brief cover letter outlining why you are the perfect fit for this role at arenaflex.

Apply Now

Join arenaflex and Turn Data into Delight

At arenaflex, data isn’t just numbers—it’s the story of every shopper, every product, and every interaction. As a Senior Data Science Analyst, you will be the storyteller, turning complex datasets into compelling narratives that drive strategic decisions and delight customers worldwide. Take the next step in your career and become part of a team that values curiosity, collaboration, and impact. Apply today and help us build the next generation of personalized shopping experiences.