Lef Filippakis

Sharpshooter
DISC Type : CD

Member of Technical Staff at Filed

Stockholm, Stockholm County, Sweden

Overview

Lef Filippakis is a Member of Technical Staff at Filed, specializing in building AI solutions for US tax firms. With a Masters degree from Chalmers University and a background in MLOps and data science, he focuses on creating scalable machine learning platforms. Colleagues frequently describe him as bright, organized, and extremely competent.

Based on his professional history and personal motto, Lef is driven by a passion for collaborative problem-solving. He focuses on crafting solutions that empower others, whether its making data accessible for colleagues or building tools to help teams innovate faster. This desire to help others succeed appears to be a core personal motivator.

Unique fact: He co-authored a research publication on using data modeling and machine learning to predict cybersecurity exploits.

Personality Overview

Precise But Practical

Rigorous & Demanding

Fast But Analytical

They respond better to strong and respectful interactions.  They take a lot of pride in personal achievements. They like to move fast and expect the same from others.

Topics They Care About

MLOps Platforms
He has hands-on experience building internal MLOps platforms on Google Cloud to accelerate the journey from proof-of-concept to production for machine learning teams.
AI in FinTech
His current role involves building AI specifically for the US tax industry, following previous data science work in the European banking sector.
Data Accessibility
A recurring theme in his career is making complex data fresh, valid, and easily accessible to drive better decisions across an entire organization.

Media Appearances

Lef has no verified media appearances

Work History

8-2025
Member of Technical Staff at Filed
6-2023
Co-Founder at Pitzi
2-2023 - 8-2025
Senior MLOps Engineer at Visa
3-2021 - 2-2023
Full-Stack Data Scientist at Northvolt
9-2019 - 3-2021
Full-Stack Data Scientist at Rocker

Education

2016 - 2018
Master’s Degree from Chalmers University of Technology
2010 - 2014
Bachelor’s Degree from Technological Education Institute of Piraeus

More Information

Social Presence :

Prographics :

Exp : 6 Location : Stockholm, Stockholm County, Sweden Job Level : Leadership Designation : Member of Technical Staff at Filed
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Insights For Selling To Lef

During A Call Or A Meeting

DO's

  • Hold your ground without indulging in one-upmanship
  • Be respectful but crisp
  • When negotiating terms, help them build an impression that they are the ones calling the shots

DONT's

  • Don't try too hard to forge relationships with them
  • Avoid being too verbose
  • Don’t take too much time in sending them information if they ask for any

When Cold Calling

When Writing An Email

While Negotiating & Closing

    The secret to closing fast with Lef is

  • Conviction around the impact matters the most to them, followed by a sense of achievement and ROI.
  • Will you ever get a clear answer from Lef

  • If they are not convinced, they will say no without any hesitation.

Insights For Deal Planning

    How fast (or slow) will Lef move?

  • They can reach decisions fairly quickly if they are convinced.
  • Can Lef take some risk or not?

  • They don’t mind risks but can be quite binary about them.

You And Lef

Personality Compatibility


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