Fintech operator & growth

Build fintech that grows and lasts.

I scale products from idea to impact - building the teams, systems, and momentum that turn prototypes into revenue. Speed when it matters. Discipline when it counts.

  • Snappi Chief Commercial Officer leading growth, partnerships, and GTM for one of Europe’s newest licensed neobanks.
  • Viva.com VP Product & Growth — Built and helped scale products and cross-functional teams driving growth across 24 European markets.
  • Operating system Focus fast. Ship often. Learn always.
Portrait of Kostas Xiradakis
Approach

Speed with rigor. Teams that win together.

I build execution engines that balance urgency with clarity — short cycles, crisp decisions, tight feedback loops. I de-risk early, turn signals into action, and create alignment across product, design, growth, and compliance so momentum never stalls.

Selected Work

Leading growth across Europe's new wave of fintech — from Viva.com to Snappi.

Snappi

Chief Commercial Officer · July 2025 – Present

Driving growth at one of Europe’s newest licensed neobanks. Oversee commercial strategy, revenue, and customer experience - aligning marketing, product design, and partnerships under a single growth engine to scale user adoption and deepen engagement.

Visit Snappi.bank (opens in a new tab)

Viva.com Outcome: First Greek unicornUnicorn

VP of Product & Growth · Feb 2023 – Jun 2025 · Product Manager · May 2017 – Feb 2023

Built an omni-channel growth engine and paired design, data, and engineering into cohesive squads. Delivered new payment flows, lifted conversion, and scaled go-to-market motions across Europe.

Visit Viva.com (opens in a new tab)

efood.gr Outcome: Acquired by Delivery HeroAcquired

Marketing Automations · Spring 2016

Partnered with marketing leadership to experiment across social channels, built the analytics infrastructure, and automated content creation. Launched and grew the company’s Snapchat and Instagram accounts.

See efood.gr (opens in a new tab)
Tiz app logo

Tiz Outcome: SunsetSunset

Co-founder, Product & Ops · Founded 2015

Designed and shipped a meet-now social platform with rapid usability tests and real-world pilots that sharpened product-market fit.

Holic logo

Holic Outcome: SunsetSunset

Marketing, Sales & BizDev · 2014 – 2016

Ran full-funnel campaigns, mapped whitespace in publishing, and co-created offerings tailored to unmet client outcomes.

Ministry of National Defense emblem

Ministry of National Defense

Software Engineer & Data Analyst · 2016 – 2017

Supported mission-critical analytics, engineered front-end tooling, and improved internal infrastructure resilience.

Uninotes logo

Uninotes Outcome: SunsetSunset

Co-founder, Product & Growth · 2013 – 2015

Built mobile and web experiences for students, orchestrated engineering sprints, and drove go-to-market with community-led growth.

Capabilities

Where I add leverage.

Strategy & execution

  • Growth systems that blend product, marketing, and data
  • Ruthless prioritization with explicit trade-offs
  • Customer development, experiments, and instrumentation that expose signal

Systems & craft

  • Onboarding and KYC that convert — and stay compliant
  • Payments and BNPL GTM and lifecycle programs
  • Operating cadence, hiring, and coaching for cross‑functional teams
Insights

New playbooks, rarely.

Field notes on scaling fintech and building growth systems. No noise, just signal.