I'm Sergej Žižek, a Senior Product Strategist passionate about crafting innovative products rooted in user insights and data-driven decisions. With a track record in guiding cross-functional teams, I develop clear strategic roadmaps, optimize user experiences, and successfully scale products from MVP to thriving solutions. My approach blends analytical thinking, clarity, and an unwavering commitment to growth, ensuring every project meaningfully resonates with users and achieves tangible business results. 
I'm Sergej Žižek, a Senior Product Strategist passionate about crafting innovative products rooted in user insights and data-driven decisions. With a track record in guiding cross-functional teams, I develop clear strategic roadmaps, optimize user experiences, and successfully scale products from MVP to thriving solutions. My approach blends analytical thinking, clarity, and an unwavering commitment to growth, ensuring every project meaningfully resonates with users and achieves tangible business results. 
I'm Sergej Žižek, a Senior Product Strategist passionate about crafting innovative products rooted in user insights and data-driven decisions. With a track record in guiding cross-functional teams, I develop clear strategic roadmaps, optimize user experiences, and successfully scale products from MVP to thriving solutions. My approach blends analytical thinking, clarity, and an unwavering commitment to growth, ensuring every project meaningfully resonates with users and achieves tangible business results. 
Portrait of man looking to the right

Work Experience

2022– 2024

Senior Product Manager

Refurbed GmbH

Led strategic roadmap for customer acquisition, increasing revenue by 20% and retention by 15% through UX research and analytics. Launched Buyback vertical, driving revenue and sustainability goals. Built and scaled the app vertical, achieving profitability and a 4.0 app store rating. Mentored junior product managers.

2022– 2024

Senior Product Manager

Refurbed GmbH

Led strategic roadmap for customer acquisition, increasing revenue by 20% and retention by 15% through UX research and analytics. Launched Buyback vertical, driving revenue and sustainability goals. Built and scaled the app vertical, achieving profitability and a 4.0 app store rating. Mentored junior product managers.

2022– 2024

Senior Product Manager

Refurbed GmbH

Led strategic roadmap for customer acquisition, increasing revenue by 20% and retention by 15% through UX research and analytics. Launched Buyback vertical, driving revenue and sustainability goals. Built and scaled the app vertical, achieving profitability and a 4.0 app store rating. Mentored junior product managers.

2023 – 2024

Product Manager

Aaqua Tech BV

Managed three agile teams, introducing Scrum at Scale and improving delivery timelines by 20%. Led international workshops to define UX standards for global markets (EU, US, Asia). Directed content management system enabling creator monetization and community growth. Delivered MVP aligned with strategic product vision.

2023 – 2024

Product Manager

Aaqua Tech BV

Managed three agile teams, introducing Scrum at Scale and improving delivery timelines by 20%. Led international workshops to define UX standards for global markets (EU, US, Asia). Directed content management system enabling creator monetization and community growth. Delivered MVP aligned with strategic product vision.

2023 – 2024

Product Manager

Aaqua Tech BV

Managed three agile teams, introducing Scrum at Scale and improving delivery timelines by 20%. Led international workshops to define UX standards for global markets (EU, US, Asia). Directed content management system enabling creator monetization and community growth. Delivered MVP aligned with strategic product vision.

2019 – 2021

Product Owner

Oryx Gaming/Bragg

Built and led a 7-member team for a B2B online casino management backoffice system. Implemented Behavior-Driven Development (BDD) for efficient automation testing. Designed the Oryx atomic design system and interactive prototypes, accelerating feedback cycles and product iterations.

2019 – 2021

Product Owner

Oryx Gaming/Bragg

Built and led a 7-member team for a B2B online casino management backoffice system. Implemented Behavior-Driven Development (BDD) for efficient automation testing. Designed the Oryx atomic design system and interactive prototypes, accelerating feedback cycles and product iterations.

2019 – 2021

Product Owner

Oryx Gaming/Bragg

Built and led a 7-member team for a B2B online casino management backoffice system. Implemented Behavior-Driven Development (BDD) for efficient automation testing. Designed the Oryx atomic design system and interactive prototypes, accelerating feedback cycles and product iterations.

2018 – 2021

Directof of UX and Product Strategy

Independent Consultant

Designed and optimized the core product experience for a mental health startup, contributing to a 40% increase in user retention. Conducted user research and usability testing to inform product decisions, translating insights into thoughtful interfaces. Collaborated closely with the founding team to define the brand’s visual and interaction language.

2018 – 2021

Directof of UX and Product Strategy

Independent Consultant

Designed and optimized the core product experience for a mental health startup, contributing to a 40% increase in user retention. Conducted user research and usability testing to inform product decisions, translating insights into thoughtful interfaces. Collaborated closely with the founding team to define the brand’s visual and interaction language.

2018 – 2021

Directof of UX and Product Strategy

Independent Consultant

Designed and optimized the core product experience for a mental health startup, contributing to a 40% increase in user retention. Conducted user research and usability testing to inform product decisions, translating insights into thoughtful interfaces. Collaborated closely with the founding team to define the brand’s visual and interaction language.

  • Product strategy ⋅

  • Customer-centric design ⋅

  • Product lifecycle ⋅

  • Product strategy ⋅

  • Customer-centric design ⋅

  • Product lifecycle ⋅