Nick Doulos, nick.os desktop

I build data systems, open-source tools and the occasional 3D web app. Most of my work so far has been about turning noisy real-world data into something reliable: GPS trajectories, streaming pipelines and the analytics on top of them.

Every role so far shipped as a new version. New here? Press ▶ Tour and the desktop will show you around.

1. v5.0FTTH Network Design Engineer · PPC S.A.Sep 2026 – now

   • Designing fibre-to-the-home networks at PPC in Athens
   • Shipped RouteRewind: GPS tracks rendered as cinematic 3D fly-throughs, entirely in the browser
   • Certified Microsoft Power BI Data Analyst and Google AI
2. v4.0Analyst & Software Engineer · Hellenic Army Informatics Support CenterMar 2025 – Mar 2026

   • Simulation & War Games Department: Python and R analysis for 5 computer-assisted exercises
   • Led a team of 4 that delivered three 40-minute 3D-animated training videos
   • Off-hours security monitoring and incident response under ISO 27001:2022
   • Visual design, logos and 3D modelling with open-source tools
3. v3.1MSc Big Data & Analytics · University of PiraeusOct 2023 – Oct 2025

   • Graduated with 9.13/10
   • Thesis: Accurate and Scalable GPS Route Reconstruction with Low Sampling Rate
4. v3.0Pyehicle · Open source · GitHub and PyPIJan 2024 – now

   • Grown out of my EMERALDS research and my BSc and MSc theses; first public release, 0.1.0, on 29 Nov 2025
   • HMM map-matching and 4D Kalman filtering with EM learning and RTS smoothing
   • Pandas and Polars support, Numba hot paths, chunked processing past 100K points
   • MIT licensed, documented in its GitHub README, supports Python 3.8 to 3.14
5. v2.0Researcher & Software Developer · University of Piraeus Research CenterOct 2023 – Jan 2025

   • Horizon Europe EMERALDS: mobility data processing at the computing continuum
   • Map-matching for sparse GPS: 88.81% better F1 and 62.82% lower distance error than the HMM baseline
   • Map-matching over Apache Kafka: 4.48× consumer speedup at 5 consumers
   • Co-authored deliverable D3.1
6. v1.0BSc Digital Systems · University of PiraeusOct 2019 – Oct 2023

   • Major in Software and Data Systems, minor in Data Management
   • First blog post: a Sudoku solver for Project Euler problem 96
   • Thesis: Pyehicle, a Python library for preprocessing vehicle data
   • IEEE student member; volunteered at NTUA UNIque Days 2022