Vangelis Tsiatsianas

PERSONAL INTERESTS

My current interests mainly focus on mobile application security, compilers, debuggers and managed runtimes, however I'm generally fascinated by any kind of quality software and willing to explore new applications and programming languages.

WORK EXPERIENCE

Software Engineer at Guardsquare

Aug 2020 – Present

LLVM Team

Leuven, Belgium

Working on LLVM-based obfuscating compilers for native and hybrid iOS apps (iXGuard), and native Android libraries (DexGuard NDK Add-On).

Graduate Research Assistant at ICS-FORTH

Mar 2018 – Dec 2019

Human-Computer Interaction (HCI) Laboratory

Heraklion, Greece

Worked on my master's thesis, a POC for live reverse debugging in LLDB.

Undergraduate Trainee at ICS-FORTH

Mar 2017 – Feb 2018

Human-Computer Interaction (HCI) Laboratory

Heraklion, Greece

Worked on my bachelor's thesis, i.e. a thread-safe event system that supports both synchronous and asynchronous events, based on the Blackboard design pattern, written in modern C++.

Undergraduate Trainee at ICS-FORTH

Jun 2014 – Feb 2017

Computer Architecture and VLSI Systems (CARV) Laboratory

Heraklion, Greece

Created a location-aware memory allocator in C, which enables transparent allocation and migration of memory pages on local and remote memory based on real-time usage statistics as a part of the Euroserver project.

PROGRAMMING LANGUAGES

Proficient knowledge: C++, C
Adequate knowledge: Python, JavaScript
Prior experience: Java

PROGRAMMING QUALITIES

Looking for optimal balance between code readability and performance.
Staying up to date with new language or library features.
Making use of design patterns and appropriate coding practices where applicable.

DEVELOPER TOOLS

Indicative, non-exhaustive list of tools I use on every C++ project:

Memory Error Detection and Profiling: Sanitizers, Instruments, Valgrind, Heaptrack
Unit Testing: Catch2
Version Control: Git
Build System: CMake

PROJECTS

LLVM Pass for printf() Call Logging: LLVM pass implemented as a project for the Type Systems and Programming Languages course, that inserts a call to fprintf() before each call or invoke LLVM IR instruction to printf(), in order to log all arguments to printf() in a file before writing to the console.

Fall 2018

Q*bert: The classic game Q*bert implemented from scratch in C++ with a custom game engine (design of the engine provided by the instructor) and SDL for the Development of Intelligent User Interfaces and Games course.

Fall 2017

AlphaVM: Compiler and virtual machine for Alpha, a dynamic programming language designed for the needs of Languages and Compilers course, written in C/C++. Lexical and syntactic analysis were performed using Lex (Flex) and Yacc (Bison), respectively.

Spring 2015