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Emmanouil GiannisakisEG
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Emmanouil Giannisakis

@emmanouilgiannisakis

Technical Product Manager at Bitfly, growing beaconcha.in MRR by 36% and launching an API product for Ethereum data.

Germany
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At Bitfly, I own the product roadmap for beaconcha.in, an Ethereum staking and validator data platform used by solo stakers and custodians. I launched a new API product end-to-end, contributing to 13% growth in Enterprise clients, and grew MRR by 36% in 12 months.

I also wrote the specifications for a full beaconcha.in website redesign, which launched in December 2025 and increased website traffic. By combining user interviews, usability tests and usage data, I helped redesign key flows and reduce user friction by 20%.

Before Bitfly, at EPAM Systems, I led product discovery and roadmap work for Bentley Motors, Roche Diabetes Care, Credit Suisse and other clients. My PhD in Human-Computer Interaction informs how I use research and data to turn complex technology into products people can use.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

CareerFoundry logoCA

CareerFoundry

Product Management Certificate, Product Management

Product Management Certificate.

Télécom Paris logoTP

Télécom Paris

PhD, Human-Computer Interaction

2015 - 2019

PhD in Human-Computer Interaction, focusing on how people learn and use complex software.

Technical University of Denmark logoTD

Technical University of Denmark

MSc, Digital Media Engineering

MSc in Digital Media Engineering.

University of Athens logoUA

University of Athens

BSc, Informatics and Telecommunications

BSc in Informatics and Telecommunications.

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