Evgeni is available for hire

Evgeni Tsvetanov

Verified Expert in Engineering

Full-stack Developer

Location

Sofia, Bulgaria

Toptal Member Since

September 20, 2021

Evgeni is a full-stack developer and network engineer with a decade of experience. He has worked in ISP and mobile carrier enterprises and on products operating across the globe, such as the Facebook network, Cisco and other ISP networks, web security, and cryptocurrency. Evgeni's experience includes all technical aspects of software development and the systems behind well-functioning products, including the user interface, servers, network, cloud, algorithms, and architecture.

Front-end Cisco Python 3 Python JavaScript React Git TypeScript MobX Redux Node.js Amazon Web Services (AWS)Django Docker MySQL Cisco Network Devices Juniper

Portfolio

Facebook

Python 3, Go, Apache Thrift, Python, Scalability, Software Architecture

Freelance

Node.js, Docker

SoftServe

React, Python 3, MobX, Redux, Pyramid, Python, UI Development...

Experience

Python 3 - 7 years Networking - 5 years JavaScript - 5 years React - 4 years MobX - 3 years TypeScript - 3 years Docker - 2 years

Availability

Part-time

Preferred Environment

MacOS, Linux, PyCharm

The most amazing...

...things I've worked on are a few systems that keep the network healthy in Facebook's data centers.

Work Experience

Production Network Engineer

2021 - 2021

Facebook

Assisted in developing a new workflow for a diagnostics tool that can be used manually or via API calls to report the health of circuits in the data center network.
Worked on a triaging and mitigation system that detects, correlates, and applies mitigation techniques on network issues.
Gained great insights into the design, provisioning, and operation of networks operating at an incredible scale across the globe.

Technologies: Python 3, Go, Apache Thrift, Python, Scalability, Software Architecture

Software Developer

2021 - 2021

Freelance

Developed a trading module and crypto exchange communication.
Built back-end services for creating and managing exchange orders.
Configured Docker deployment for a development environment.

Technologies: Node.js, Docker

Senior Full-stack Developer

2016 - 2021

SoftServe

Developed a complex UI for a security testing platform to test vulnerabilities, including malware, viruses, protocol exploits, and zero-day attacks.
Built a healthcare application that provides a platform for healthcare manufacturers, suppliers, and hospitals to sell and purchase healthcare equipment.
Implemented the main message sequence exchange of several network protocols, including TLS, while following RFC specs. The protocol implementations were a part of a larger security testing tool.

Technologies: React, Python 3, MobX, Redux, Pyramid, Python, UI Development, User Interface (UI), Healthcare Supply Chains, Web Security, Transport Layer Security (TLS), Request for Comment (RFC), Network Protocols, NGINX, HTML, HTML5, CSS, Sass, Less, Full-stack, Web Development, Docker, REST, Next.js, Gulp, Webpack

Network Engineer

2014 - 2015

A1

Co-created network designs for the core network of a mobile carrier and an ISP network in collaboration with a team.
Planned future expansions and changes in the network.
Managed the RIPE Local Internet Registry account and RIPE database objects and policies.
Worked on a software tool for provisioning and deploying network services across multiple network devices.

Technologies: Cisco Networking, JavaScript, Django, PostgreSQL, Cisco

Network Administrator

2012 - 2014

NET1

Developed CLI tools and scripts that automate everyday tasks, such as gathering and aggregating information from network devices.
Managed and administered core network devices in an ISP network.
Created designs for business virtual private networks.

Technologies: Networking, Juniper, Cisco, VPN

Experience

Back End for Crypto Trading Platform

https://www.cryptoview.com/

A cryptocurrency portfolio manager and multi-exchange trading platform. As a back-end Node.js developer, I integrated crypto exchanges and developed services to create and manage buy/sell exchange orders.

Web User Interface for a Security Testing Platform

A security testing platform for a variety of attack vectors, including network protocols, zero-day attacks, and malware. The UI offered various customization and configuration options with lots of wizards, dynamic views, interactive topologies, forms, and more. The platform also synced, transformed, and moved a lot of data between the web application and the back-end APIs.

I was the senior front-end developer for the project, and the application was built using React, MobX, and TypeScript as the base tech stack. We kept the interface performant and the development experience on the positive side.

Healthcare Equipment Platform

A healthcare platform that connects manufacturers of healthcare equipment with distributors and hospitals. I was a full-stack developer on the project. The back-end stack was built using Python, Pyramid, SQLAlchemy, and PostgreSQL, and we used TypeScript, React, and Redux for the user interface.

Certifications

FEBRUARY 2021 - FEBRUARY 2024

AWS Certified Developer - Associate

Amazon Web Services

OCTOBER 2019 - PRESENT

MongoDB Certified Developer, Associate Level (C100DEV)

MongoDB University

SEPTEMBER 2016 - PRESENT

Python 3.4

Brainbench

DECEMBER 2015 - DECEMBER 2018

Cisco Certified Network Professional (CCNP)

Cisco

MAY 2014 - MAY 2017

Service Provider Routing and Switching, Professional (JNCIP-SP)

Juniper

OCTOBER 2013 - MAY 2017

Service Provider Routing and Switching, Specialist (JNCIS-SP)

Juniper

SEPTEMBER 2013 - MAY 2017

JNCIA-Junos

Juniper

JULY 2013 - JULY 2016

Cisco Certified Network Associate (CCNA)

Cisco

Skills

Libraries/APIs

React, MobX, Node.js, RxJS, SQLAlchemy

Tools

Git, PyCharm, VPN, NGINX, Gulp, Webpack

Languages

Python 3, JavaScript, Python, TypeScript, Go, HTML, HTML5, CSS, Sass, Less

Frameworks

Django, Redux, Pyramid, Apache Thrift, Next.js

Storage

MongoDB, NoSQL, PostgreSQL, MySQL

Paradigms

REST

Platforms

Amazon Web Services (AWS), Docker, MacOS, Linux

Other

Networking, Cisco Networking, Cisco, Front-end, Juniper, UI Development, User Interface (UI), Healthcare Supply Chains, Web Security, Transport Layer Security (TLS), Request for Comment (RFC), Network Protocols, Full-stack, Web Development, Scalability, Software Architecture

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