BARTŁOMIEJ PIREK
Product Owner specializing in personalization and recommendation systems. I architect and deliver end‑to‑end solutions that transform customer experiences through data‑driven personalization. My approach combines strategic product thinking with hands‑on implementation—from concept ideation to technical architecture, development, experimentation, and performance analysis. I champion personalization that feels effortless to users while driving measurable business impact. At Decathlon, I successfully deployed state‑of‑the‑art recommendation engines across eight markets, modernizing the technology stack and creating seamless customer journeys.
01.5 AI_ASSISTANT
02
EXPERIENCE_LOG
Recommendation & Personalisation Product Owner
Decathlon Polska
May 2023 – Present (2 years 3 months)
- Led enterprise‑scale personalization transformation across 8 international markets, modernizing technology infrastructure and establishing data‑driven customer experience strategies.
- Designed and executed comprehensive evaluation frameworks for marketing technology platforms, driving strategic vendor selection based on performance, scalability, and cost optimization.
- Architected omnichannel personalization ecosystem spanning multiple customer touchpoints, creating seamless and contextually relevant user experiences at scale.
- Developed advanced recommendation algorithms and intelligent content optimization systems, significantly improving customer engagement and business conversion metrics.
- Established privacy‑first personalization frameworks compliant with international data protection regulations, balancing user experience with regulatory requirements.
- Built robust data pipeline infrastructure achieving enterprise‑grade reliability and coverage, overcoming technical constraints through innovative tracking methodologies.
- Implemented agile product delivery processes enabling rapid iteration and deployment of customer experience enhancements outside traditional development cycles.
- Created user‑centric design principles and experience guardrails ensuring personalization feels intuitive while driving measurable business impact and customer satisfaction.
AI & Automation Specialist | Solution Architect
Freelance
January 2024 – Present (1 year 7 months)
- Fine‑tuned domain‑specific AI models.
- Built AI agents & experts to streamline work.
- Integrated third‑party APIs and architected workflows.
- Delivered productivity‑boosting AI solutions.
- Shipped light React apps on Vercel + Supabase.
Analytics and Automation Team Leader
Digital Heart
June 2022 – April 2023 (11 months)
- Led cross‑functional analytics and automation team, establishing data‑driven decision making processes across multiple client accounts.
- Developed comprehensive tool selection framework and documentation standards, optimizing technology stack for scalability and performance.
- Architected business intelligence dashboards providing real‑time insights, enabling stakeholders to make informed strategic decisions and track KPI performance.
- Coordinated vendor relationships and conversion optimization strategies, managing external partnerships while driving internal capability development.
- Designed and delivered training programs for internal teams, ensuring knowledge transfer and building organizational analytics competency.
Digital Marketing Specialist
Digital Heart
April 2021 – July 2022 (1 year 4 months)
- Implemented comprehensive conversion rate optimization programs, conducting systematic A/B testing to improve user experience and increase revenue conversion.
- Executed advanced campaign analysis and KPI alignment strategies, ensuring marketing initiatives directly contributed to business objectives and ROI targets.
- Developed integrated email marketing campaigns and e‑commerce strategies, creating cohesive customer journeys that enhanced engagement and retention.
- Optimized marketing funnels through data‑driven insights, identifying bottlenecks and implementing solutions that improved overall campaign performance.
Category Marketing Specialist
RTV EURO AGD
October 2020 – March 2021 (6 months)
- Orchestrated omnichannel marketing campaigns across digital and traditional channels, ensuring consistent brand messaging and optimized customer touchpoints.
- Negotiated and managed strategic manufacturer partnership promotions, securing co‑marketing budgets and executing collaborative campaigns that drove category growth.
- Implemented comprehensive budget management and strategic planning processes, optimizing marketing spend allocation to maximize ROI across multiple product categories.
- Analyzed category performance metrics and market trends, providing actionable insights to guide promotional strategy and inventory planning decisions.
Getaways Merchandising Manager
Groupon
January 2018 – September 2020 (2 years 9 months)
- Architected and executed comprehensive marketing strategies for EMEA travel segment, managing multi‑market campaigns across diverse cultural and regulatory environments.
- Developed strategic annual marketing plans and promotional calendars, coordinating seasonal campaigns and optimizing timing for maximum customer engagement and revenue impact.
- Led cross‑functional collaboration with UX/UI and IT teams, implementing systematic A/B testing methodologies to optimize conversion rates and user experience.
- Leveraged advanced SQL analytics in Teradata for complex sales reporting and data visualization, providing actionable insights for strategic decision‑making and performance optimization.
- Managed end‑to‑end merchandising operations, from supplier relationship management to customer acquisition, ensuring seamless travel booking experiences across all EMEA markets.
Quality Assurance Analyst
Groupon
April 2017 – December 2017 (9 months)
- Designed comprehensive QA processes and workflows, establishing systematic quality control frameworks that reduced defect rates and improved operational efficiency.
- Developed and delivered specialized training programs for team members, ensuring consistent quality standards and knowledge transfer across departments.
- Implemented quality monitoring systems and feedback loops, creating sustainable processes for continuous improvement and error prevention.
- Collaborated with cross‑functional teams to establish quality benchmarks and performance metrics, ensuring alignment between quality objectives and business goals.
Travel Deal Admin
Groupon
June 2016 – March 2017 (10 months)
- Provided comprehensive administrative support for EMEA travel operations, managing complex multi‑market logistics and ensuring seamless coordination across diverse regional requirements.
- Developed and maintained reporting systems for interdepartmental coordination, creating data pipelines that improved communication efficiency and decision‑making processes.
- Streamlined operational workflows and documentation processes, reducing administrative overhead while maintaining accuracy and compliance across all regional markets.
- Collaborated with international teams to resolve operational challenges and implement process improvements, fostering better cross‑regional collaboration and knowledge sharing.
Intern
PZU
July 2015 – March 2016 (9 months)
- Conducted comprehensive data analysis for corporate client portfolios, transforming raw insurance data into actionable business insights and strategic recommendations.
- Prepared executive‑level presentations and reports, developing skills in data visualization and stakeholder communication within Poland's largest insurance company.
- Provided analytical support to the Corporate Client Division, contributing to client retention strategies and business development initiatives through data‑driven insights.
- Collaborated with senior analysts and managers to understand insurance industry dynamics, gaining foundational knowledge of corporate risk assessment and client relationship management.
03 SKILL_MATRIX
CORE_COMPETENCIES
ANALYTICS_&_DATA
MARKETING_AUTOMATION
TECH_STACK
04 CREDENTIALS_DATA
Bachelor's in Finance and Accounting
Poznań University of Economics
2009 – 2012
Google Cloud for Data Analyst
DaftAcademy x Google
Oct 2022 – Dec 2022
Google Analytics 4
Analytics Mania
Certified
Advanced GTM Course
Analytics Mania
Certified
Data Science Bootcamp 2022
Udemy
Certified
Python for Machine Learning
Udemy
Certified
SQL – MySQL for Data Analytics
Udemy
Certified
English for Business Certificate
London Chamber of Commerce
Certified