Summary

I am a software developer with a wide area of experience, ranging from simple web projects to large scale financial solutions.

Work Experience

Software Developer

Parking Telecom Labs

Developing the backend for a highly scalable microservice-based architecture.

Used programming languages and technologies:

Java 8
J2EE, Spring, Spring Boot
MySQL, Couchbase, JPA, Hibernate
RabbitMQ
Google Cloud Platform, Docker, Kubernetes, Jenkins

I was also tasked with developing the company's Android applications as the sole Android developer

Used programming languages and technologies:

Kotlin
Firebase

Software Developer

InterCard Finance AD

I mainly worked on software for POS terminals (PAX) - both running on the devices themselves and the services they use.
Additionally, I often worked on other distributed services used by most of the company's products.

Used programming languages and technologies:

C, C++, C#, Java, XML
Microsoft SQL Server
Android
ISO-8583, EMV
Payment card processing

Freelance web developer

Worked on many projects for small to medium businesses.
The projects mostly consisted of: adding much needed new features to websites, extending various open source platforms and building e-commerce systems with or without the use of ready solutions.

Most of the online store projects are based on PrestaShop or a WordPress instance with WooCommerce.
Regardless of the choice of language or technology, there was always the need to either write entirely new plugins or rewrite most of what the clients had started with.

Used programming languages and technologies:

PHP, JavaScript, HTML, CSS
Symfony2, WordPress, PrestaShop, SummerCart, jQuery
MySQL

Education

Certifications

Technical Skills

Operating systems

Linux:
- Fluent: Debian GNU/Linux and its derivatives (Mint, Ubuntu, etc.)
- Intermediate: Fedora, Slackware
- Basic: OpenSuse
Microsoft Windows: 10, 8.1, 7, XP

Open source contributions

I spent a few years as a part of Mozilla's localization team for Bulgarian. I mainly worked on addons.mozilla.org and some minor pages and other applications.

Some of my other contributions can be found at GitHub - @chilyashev

Other

RabbitMQ, Docker, Kubernetes, Virtualization (ESXi, Google Cloud), JUnit, Object-oriented analysis & design (OOAD), SSL, embedded programming - Microchip PIC, Cypress PSoC, single-board computers (OLinuXino, Raspberry Pi,etc.), J2ME, Electronic payments, Debit and credit cards, Integrated Circuit Cards (ICC), Contactless Payment Cards (PICC), POS Terminals, Terminal Management Systems, JIRA, J2EE, Servlets, JPA

Personal projects

Note: This gets outdated as soon as it is updated here. I like to experiment by frequently adding and removing things to my network.

I run an enterprise infrastructure at home utilizing virtualization, containerization, and high availability. Currently, it consists of two HP ProLiant servers, a dedicated hardware firewall and multiple single board computers. I mainly use it for a NAS and continuous delivery and integration for my personal projects.

A graphic representation of one of the network's iterations can be found here(https://img.chilyashev.com/2019/04/HwHzzGC.png).

A somewhat detailed explanation for the previous setup can be found on my website (https://chilyashev.com/2019/06/lab/)(in Bulgarian).

Used software and technologies:

VMware ESXi
Ansible
pfSense, HAProxy, OpeNVPN, Let's Encrypt
Grafana, InfluxDB, Telegraf, SNMP
Jenkins

A collaborative project for creating a simulation model of the communication network used by an MPP computer with a binary hypercube architecture.
A paper on the subject can be found on page 52 of the fourth issue of the Scientific International Conference of Computer Sciences and Engineering: http://csejournal.cs.tu-varna.bg/cse_journal_1_2016.pdf

Source code on GitHub: https://github.com/chilyashev/CrossbarSwitchBinaryHyperCube

Used programming languages and technologies:

Java
JavaFX