History & Mission

FSI has been innovating in the field of Fantasy Sports software development since 2012. It has been the first company to introduce betting-oriented Fantasy Sports products, designed according to operators' needs.

  • The company launched a fully licensed B2C Fantasy Sports Betting proof of concept in 2014, under the ‘Bet4theBest’ brand, as a mean for further product development. The team then utilised this hands-on experience alongside feedback from users and gaming operators to develop an innovative, world-first Fantasy Sportsbook concept, the Fixed-Odds-Fantasy (FOF). The product is based on proprietary fantasy odds generation algorithms and was premiered at ICE London 2019.
  • Committed to innovation and growth, FSI invests in teamwork aiming to deliver the next gen fantasy sports products of the global gaming and betting market.

Our Team


Dennis Tsalikis

Company founder and CEO with a liking for boxing – both in the ring and at the negotiating table.


Bill Mexias

Co-founder and COO, a businessman with a keen eye for detail and an incurable sweet tooth!


Panos Papakostas

Technology master, people manager and a committed volunteer in Fire and Civil protection for over 20 years!

Marketing Manager

Maria Arnidou

#DigitalMarketer, concept creator and all-round writer with a love for dogs and music playlists.

Accounting Manager

Sotiris Skrivanos

Always positive and your man for financial reports, enjoys the occasional footie session at the office TV screen.

Product Owner

Manolis Tsalikis

Agile team center, go-to man for all things football and sports, and part-time DFS and betting expert!

QA Engineer

Liana Koulouri

Agile QA expert with an affinity for the modern urban landscape, cycling and designing test strategies.

Software Engineer

Dimitra Mavroforaki

Motivated and a team player, represents the next generation of women making a difference with code.

Front-End Developer

Dimitris Konstantinidis

All-round Front-End developer and natural health guru with a soft spot for manga and gaming.

Software Engineer

Elias Karakoulakis

R&D engineer with a good sense of business. Handles both computer code and mason's trowel with ease.

Software Engineer

Ippokratis Takopoulos

Passionate about coding and committed to a steadfast work plan, is also a fan of healthy lifestyle.

Software Engineer

Konstantinos Kollias

Earnest, meticulous and hard-working, with a whimsical sense of humour and serious parenting skills! 

Software Engineer

Konstantinos Thomaidis

A dedicated software engineer, passionate about programming, avid video gamer and aspiring guitarist!

Software Engineer

Petros Vompiris

Analytical and thorough developer, always asking the right questions – also famous for his croissants.

Software Engineer

Sotiris Syrgiannis

Focused professional, keen on learning new technologies and travelling whenever he gets the chance.

Team Member

New Member

Drafting Period - Our scouts are working on drafting new valuable members. Stay tuned for more!

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