Chris Samarinas

Hello, I'm a research assistant at National University of Singapore doing research on large-scale information retrieval and natural language inference. Previously, I was at Plural AI, where I worked on entity extraction from webpages and semantic search, and at Donaco, where I worked on contextual recommendation of charity campaigns. I'm passionate about AI research, improving the way we discover and organize information.


Research Assistant

National University of Singapore

Working on large-scale retrieval for question answering and fact-checking.

Developed Quin, a semantic search engine for automated fact-checking and question answering.

February 2020 - Present

Machine Learning Engineer (NLP)

Plural AI

Plural AI is a fintech startup backed by EF, Speedinvest, AI Seed (and more), that builds a knowledge engine for the finance industry. The company focuses on extracting content from corporate websites and financial statements and on question answering to complex financial queries (ex. construction companies in London with turnover growth > 50%).

At Plural AI, I developed a novel state-of-the-art concepts extraction model to extract products, industries, brands and business activities from corporate websites. I owned the whole concepts extraction pipeline, from the annotation tool development and website crawling, to the productionization and deployment.

Extracted concepts from more than 800K websites, and more than 80M text blocks. Improved the span based website level F1 score of the initial unsupervised heuristic approach by more than 25%.

Developed a scalable semantic search service of companies.

October 2018 - February 2020

Machine Learning Engineer (NLP)

Donaco LTD

Worked on the advertising platform and modeled real-time user behavior using machine learning for better ad serving.

Designed a content-based recommendation system for recommending relevant charity campaigns to the content of news articles.

June 2018 - September 2018

Software Consultant

Responsible for the redevelopment of HotBot metasearch engine.

June 2018 - November 2018

Independent Web Developer

Worked as a freelance software engineer on metasearch engines for various companies and on many other small personal projects like social networks, news aggregators and computer vision software.

Fun fact: A small piece of custom search engine software that I developed and sold for $15 online, was also used by a company in Turkey (Geliyoo) that got €2.500.000 funding from the government. It became a quite popular story in Turkey for a while!

July 2013 - September 2017


Imperial College London

MSc in Advanced Computing
Thesis: Personalized news recommendation and popularity prediction using neural networks
October 2017 - September 2019

Aristotle University of Thessaloniki

Information Systems

Thesis: WAMBy: Web-based open domain QA system using information retrieval techniques and machine learning (pdf in Greek)

GPA: 9.67/10.00

September 2013 - June 2017


Programming Languages & Tools


Other skills

C, C++, LaTeX, Matlab, Game Maker Studio, Video Editing


Useless skills

Skiing, Table Tennis, FPV Drone Racing, Piano


As a computer science researcher I am interested in machine learning and mainly in applications in natural language processing and understanding. I am also interested in information retrieval and recommender systems.

As a software engineer I hate working on already existing projects without making an impact. I like working on novel ideas from scratch that can change the world and improve our daily life.

As a human I like travelling, tasting food and meeting smart people with great ideas.

Awards & Certifications

  • 1st place in Bioengineering Hackathon 2018
  • Hackathon Thessaloniki, Honor 2014
  • Great Moment for Education Scholarship 2013
  • 1st place in the 1st Greek Students' Website Design Competition 2010
  • 1st prize in National Mathematics Competition 2009
  • IELTS Academic 2016
  • Certificate for Proficiency in English 2010


Large-scale semantic search using neural ranking models.



Personalized news recommendation and summarization.


Web-based open domain QA system using information retrieval techniques and machine learning.



A platform that connects elderly with their relatives and paid carers when they fall down, get lost or need help using Wear OS smartwatches. Won the first place in the 1st Bioengineering Hackathon in Greece.


The world's first open source torrent search engine.


Maze generator, editor & solver in Java.


Developed in Hackathon Thessaloniki, an online responsive web application for instant issues reporting in the city.


Metasearch engine

Developed a metasearch engine that combines results from Google and Bing (personal contract).



A chatbot I developed for the The Chatterbox Challenge 2014.