I'm Jellen Vermeir
Freelance IT and Data Science Consultant
- Company Essential Data Science Consulting ltd.
- Phone (+32) 473 47 48 59 / (+359) 877 96 80 48
- E-mail email@example.com
- Next Stops Reykjavík, Iceland / Oakland, New Zealand
- Min. Rate 900€+/day (or Equivalent)
- Weekends Only
Hi, my name is Jellen. I wear many different hats in life: I’m a computer engineer, a data scientist, a prop trader, a cryptocurrency miner, a poker strategist, an entrepreneur, an AI-fanatic and a healthcare & biotech enthusiast. I’m fascinated by technological progression and I enjoy getting things done. Feel free to drop me a line if you would like to discuss something.
Jellen graduated as a computer engineer and subsequently completed several high impact government projects as a business analyst. Jellen then made a career shift towards quantitative finance and obtained an additional degree in financial and actuarial engineering. He completed this advanced education track while simultaneously working on his personal startup projects related to algorithmic trading and quantitative fund management.
Jellen has recently founded Essential Data Science Consulting ltd. and is currently providing high profile consultancy services towards the industry as a data scientist and/or quantitative analyst. He’s also venturing into the exciting new world of blockchain technology and cryptocurrency network security.
Areas of Expertise
Open Source, Open World
Stackoverflow - R / Python Data Science Support
During the previous years, I offered some -very minor- community support on stackoverflow by answering data modeling related questions. It is my intention to restart these efforts in a more serious manner very soon. My focus will most likely remain on R, but I would like to contribute to the Python community as well.
You can find my SO profile on this page.
PoloniexR - Cryptocurrency Trading Package
The PoloniexR package provides a convenient user interface to the Poloniex (Cryptocurrency Trading) REST API.
Poker Handevaluation System
View Github for project details and demo.
This project provides a custom implementation of a Texas Hold ’em handevaluation subsystem as described in chapter 5 of the original Loki Poker Bot research paper. For preflop play, fixed relative strength values are provided based upon simplified monte carlo simulations where all players call to the end of the hand. For postflop play, calculations are provided to determine immediate handstrength and future handpotential via complete scenario enumeration (given the opponent hand probability distributions as input).
From this handevaluation system, betting strategies can be derived and opponent models can be added to provide more realistic and adaptive hand probability distributions. The university of Alberta Computer Poker Research Group has performed extensive research on both fronts and has succesfully used Poker as a testbed for AI and reinforcement learning techniques.
Financial Risk Modeling - Research Project
View Github for project details and demo.
In the paper and demos on Github we focus our attention on the risk modelling aspects of the portfolio management process. We first offer some motivational examples on why one should stay clear of the normality assumption while assessing portfolio risk. Stylized facts of univariate and multivariate financial market data are illustrated and discussed. We follow up with a few definitions and interpretations of financial risk and focus our attention to the Value at Risk (VaR) and Expected Shortfall (ES) measures. In the remainder of the paper we present alternatives to the normal distribution for modelling and forecasting the latter risk measures:
- We give an exposition on the Generalized Hyperbolic Distribution (GHD).
- We introduce methods and concepts from extreme value theory (EVT) as a means of capturing severe financial losses.
- Conditional risk measurements are presented in the form of GARCH models.
- Copulae are discussed with the purpose of modelling multivariate dependencies between assets.
From a more practical point of view we perform out of sample backtests and run statistical tests to evaluate the risk forecasting performance of the models. Here, we argue that a mixed (E)GARCH-Clayton/Gumbel copula model is especially suitable for asset return modeling and risk forecasting at the portfolio level. We demonstrate how the latter tool can be employed to provide superior risk adjusted returns in a portfolio context by reliably targetting a certain expected VaR (or ES) level during the portfolio rebalancing process.
Cointegration-Based Statistical Arbitrage Trading Strategy
View Github repository for paper and demos. This project consists of a proof of concept and conceptual demo of a simple stat-arb trading strategy that is based upon cointegration method.
Financial Engineering Toolkit
View Github for project details an demos.
This Matlab based Financial Engineering Toolkit contains several smaller subprojects in the domain of Financial Engineering and the Structuring of Financial products. Available subprojects:
- Pricing, Greeks, implied volatility of barrier options under Black-Scholes.
- Pricing, Greeks, implied volatility of Lookback options under Black-Scholes
- Stock path simulation under Black-Scholes and Heston
- Yahoo Option Chain Downloader
- Heston Calibration Toolkit
- Structuring of a Reverse Convertible (Paper and Demo)
METATRADER 4 - BACKTEST AND EXECUTION FRAMEWORK
View Github repository: This mql4-framework consists of a few dedicated modules that are linked together in order to assist the user with rapid prototyping and testing of simple TA forex strategies. An example expert advisor is also added for demonstration purposes.
SECURITIES MASTER DATABASE
View Github repository: This project includes scripts that can be used to set up a basic securities master database. The database structure is fairly generic in the sense that it can contain data for any assetclass type and/or datafrequency. Additionally, the project includes scripts for the downloading, parsing and inserting of timeseries data for the S&P500 stocks, SPDR ETF funds, the BEL20 stocks and its corresponding ETF tracker. Simple scripts for data cleaning, outlier detection and corporate action backadjustment are provided as well.
Actuarial Statistics Projects
View Github repository: This project contains a few smaller subprojects that lie in the domain of non-life insurance actuarial statistics. Each of the subprojects contains its own readme file with additional information regarding the added functionality. Currently added subprojects:
- Claim arrival modelling using poisson processes.
- Loss severity modelling using a spliced ‘body and tail’ approach
- Claim frequency modelling using Generalized Linear Models (GLM)
Setting up a proof of work (PoW) cryptocurrency mining operation in Iceland: Obtaining competitive advantages due to the following factors:
- Geothermal & hydro-electric power (electricity).
- Cold climate (cooling).
- Fibre internet access (P2P communication).
- Deploying a GPU-based mining farm (ASIC resistant hashing algorithms only).
- Using optimization tools for coin selection.
- Continuously selling new coins at market prices.
Consultant - IT / Data Science
Providing IT and data science support to the front office trading department of a commodity trading company. Responsible for end-to-end project delivery on both technical and modeling side.
- Providing a Transparent User Interface to the Back-end Data Storage (R / Python).
- Implementation of a centralized model-deployment and backtesting framework.
- Energy Demand Forecasting (Machine Learning and Time-Series Analysis).
- Mult-Step Constrained Gas Flow Routing (Mathematical Optimization and Graph Theory).
Researching, developing and deploying the EssentialQuant RiskResTrained Hedge Fund (Private investment fund, managed by Essential Data Science Consulting ltd.)
Obtaining deep technical exposure to the complete algotrading R&D pipeline:
- Strategy Development
- Risk Management
- Portfolio Optimization
- Reference Data Handling
- Execution Modeling
Business Analyst Consultant
Preparing and coordinating the production execution of the Belgian governments' mission critical and deadline sensitive mass adaptations (Indexations, holiday money calculations, retirement benefit payouts etc)
Graduate Certificate in Artificial Intelligence (4 Courses)
Msc. Financial and Actuarial Engineering
Msc. Computer Science Engineering
Bsc. Information Technology
Awards and Achievements
Received the Belfius Thesis Award for writing the best Master’s thesis in the Financial and Actuarial Engineering program. The research involved the development of risk management components that allow for accurate predictions of portfolio level risk metrics.
Send me a message
- E-MAIL firstname.lastname@example.org
- PHONE & WHATSAPP (+32) 473 47 48 59
- SKYPE EssentialQuant
- TWITTER @EssentialQuant
- COMPANY ADDRESS Moskovska str. 21B fl. 3, 1000 Sofia, Bulgaria
- CURRENT LOCATION Zandstraat 12C b302, 1000 Brussels, Belgium