Borislav Yordanov, Developer in Varna, Bulgaria
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Borislav Yordanov

Verified Expert  in Engineering

Full-stack Developer

Location
Varna, Bulgaria
Toptal Member Since
August 24, 2022

Borislav is a full-stack developer and certified AWS and Twilio engineer experienced as a team lead, DevOps engineer, and consultant for big data projects. He enjoys participating in all aspects of software development, from analyzing product requirements to developing a high-availability project. Borislav specializes in cloud computing, real-time communication, high-availability systems, and web development using React and TypeScript.

Portfolio

HOME NATION.COM LLC
PHP, Twilio, CodeIgniter, MySQL, JavaScript, CSS, HTML, tRPC, Next.js, Prisma
Hommz Technologies Ltd
React, Node.js, PostgreSQL, Full-stack, TypeScript, REST APIs, Leadership...
Nuance Languages, LLC
Twilio, Python, Django, APIs, Minimum Viable Product (MVP)

Experience

Availability

Part-time

Preferred Environment

Linux, MacOS, JetBrains, WebStorm, IntelliJ IDEA, iOS, OpenAI GPT-3 API, ChatGPT

The most amazing...

...project I've worked on is medical software that helps medical professionals to diagnose patients early and prevent severe conditions and diseases.

Work Experience

PHP/Twilio Developer

2023 - PRESENT
HOME NATION.COM LLC
  • Launched self-managed call center software that runs with 100% uptime.
  • Increased answered incoming calls by over 25% in less than five months.
  • Build a solid, stable, and scalable solution. The project has been bug-free for over two months.
Technologies: PHP, Twilio, CodeIgniter, MySQL, JavaScript, CSS, HTML, tRPC, Next.js, Prisma

Full-stack Team Lead

2023 - PRESENT
Hommz Technologies Ltd
  • Managed team task definitions from the product department.
  • Helped improve team progress pace and assisted with everything necessary to ensure a smooth working process.
  • Assisted developers with task development, complex issues debugging, and development lifecycle improvements.
  • Played a major role in defining and executing DevOps, improving the overall code review and deployment man-hours to a minimum.
  • Created a fully automatic "Code review" -> "CI" -> "CD" workflow.
Technologies: React, Node.js, PostgreSQL, Full-stack, TypeScript, REST APIs, Leadership, Team Leadership, Remote Team Leadership, Amazon Web Services (AWS), NestJS, Monorepos, Jira, Payment APIs, Minimum Viable Product (MVP), Team Management, CI/CD Pipelines, Amazon Aurora, AWS SDK

Twilio Expert

2023 - 2023
Nuance Languages, LLC
  • Registered for a A2P 10DLC campaign with Twilio to meet US regulations.
  • Reached 100% message deliverability for the configured campaign.
  • Improved message quality and delivery standards and applied carrier requirements.
  • Investigated the reason for SMS messages not arriving.
Technologies: Twilio, Python, Django, APIs, Minimum Viable Product (MVP)

Full-stack Developer

2022 - 2023
Berlin Bytes GmbH
  • Built a scaling headless eCommerce platform built with Next.js on top of a Magento 2 back end.
  • Developed a responsive web app that supports all devices, from small mobile phones to 5K desktops.
  • Oversaw back-end development and GraphQL integration.
  • Managed the Magento 2 product, cart, and order integration.
Technologies: Full-stack, TypeScript, React, Express.js, Next.js, Kubernetes, Amazon Web Services (AWS), PostgreSQL, Terraform, GraphQL, Magento 2, Magento API, Tailwind CSS, REST, REST APIs, Responsive Design, User Interface (UI), Git, API Integration, Code Review, Full-stack Development, Cloud Architecture, Payment APIs, Minimum Viable Product (MVP), CI/CD Pipelines, AWS SDK

Senior Full-stack Developer

2021 - 2022
NFT Guru
  • Joined the startup and learned how quickly startups change to find their niche, for example, from selling clothes and accessories to selling NFTs.
  • Created my first smart contract on the Ethereum network and understood the EIP-20 and EIP-721 standards.
  • Used React, GraphQL, Next.js, Azure Cosmos DB, Cryptouch, and many more.
Technologies: JavaScript, TypeScript, Apollo Server, React Apollo, React, Next.js, GraphQL, React Native, Ably, Web 3.0, Non-fungible Tokens (NFT), Cryptocurrency, Azure Cosmos DB, HTML5, CSS3, Real-time Communication (RTC), Twilio, Node.js, NoSQL, Full-stack, WebSockets, HTML, CSS, UI Development, SCSS, NPM, Front-end, Express.js, Microservices Architecture, APIs, Architecture, Mentorship, Web Development, Databases, Caching, Session Handling, Figma, JSON, eCommerce, Marketplaces, JSON Web Tokens (JWT), JSX, Responsive Web Apps, GitHub, Serverless, iOS, Android, Mobile App Development, Mobile Development, App Store, Google Play Store, Stripe, Stripe API, Stripe Subscriptions, Stripe Checkout, Serverless Architecture, Apollo, Redis Cache, Tailwind CSS, Back-end, Responsive Design, User Interface (UI), Git, Technical Architecture, Web3.js, Blockchain, Decentralized Finance (DeFi), Remote Team Leadership, API Integration, Code Review, Full-stack Development, Technical Leadership, Technical Consulting, Payment APIs, Azure, SMS, Minimum Viable Product (MVP), Startups, Vercel

Technical Team Lead

2018 - 2021
Scopic Software
  • Served as the Twilio certified engineer and an expert providing guidance or advice about Twilio services in a company of 300+ people.
  • Led the team that created an internal real-time communication tool from scratch, joined projects to fix problems and get them back on track, and learned how to quickly adapt to a new team and manage time.
  • Collaborated with one of the biggest tech companies in Germany to create software that tracks a real-time racing competition.
  • Contributed to software for the medical industry in the UK.
  • Acted as an expert for AWS cloud architecture advising university professors.
Technologies: Web Security, Big Data, Real-time Communication (RTC), VoIP, Twilio, SaaS, DevOps, System Architecture Design, Medical Software, JavaScript, Node.js, React, React Native, GraphQL, REST, WebRTC, Amazon DynamoDB, Redshift, AWS Cloud Architecture, C++, Java, Wireless Communication, Multicast, Rust, HTML5, CSS3, Amazon Elastic Container Service (Amazon ECS), Multitenancy, TypeScript, Terraform, Kubernetes, MongoDB, NoSQL, Relational Databases, Amazon Web Services (AWS), Full-stack, Content Management Systems (CMS), WebSockets, AWS Lambda, Auth0, AWS CloudFormation, MySQL, HTML, CSS, Bootstrap, UI Development, SCSS, NPM, Front-end, Cloud Infrastructure, Docker, Python, Laravel, Express.js, PostgreSQL, Microservices Architecture, SQL, APIs, Architecture, Enterprise Systems, Facebook API, REST APIs, Google Ads API, Django, Consulting, Mentorship, Web Development, Databases, Caching, Session Handling, PHP 7, Vue, Microservices, Amazon ElastiCache, Elasticsearch, Figma, JSON, XML, eCommerce, Marketplaces, JSON Web Tokens (JWT), Redux, OAuth, JSX, Responsive Web Apps, GitHub, Serverless, Jest, CTO, iOS, Android, Mobile App Development, Mobile Development, App Store, Google Play Store, Subscriptions, Subscription Processing, Stripe, Stripe API, Stripe Subscriptions, Stripe Checkout, Serverless Architecture, Amazon EC2, Amazon S3 (AWS S3), Redis Cache, Amazon CloudFront CDN, Tailwind CSS, Distributed Systems, Back-end, Application Architecture, Material UI, Responsive Design, User Interface (UI), Git, Technical Architecture, Leadership, Remote Team Leadership, Team Leadership, API Integration, Code Review, Angular, Cloud Platforms, Full-stack Development, Technical Leadership, Software Architecture, Estimations, Technical Consulting, Cloud Architecture, System Design, Near-field Communication (NFC), Payment APIs, SMS, Minimum Viable Product (MVP), Team Management, CI/CD Pipelines, Amazon Aurora, AWS SDK, Amazon Simple Queue Service (SQS), AWS Step Functions, Next.js

Senior Software Developer

2018 - 2018
Scopic Software
  • Joined a rapid development project, met tight deadlines, and became a team leader in just two months.
  • Tracked team progress, managed tasks and estimations, and reported to stakeholders.
  • Developed a high availability chat engine based on AWS ECS, Node.js, and Redis.
Technologies: TypeScript, Node.js, MySQL, MariaDB, Twilio, Twilio API, Twilio Programmable Video, React, React Native, PHP, PHP 7, HTML5, HTML, CSS, CSS3, Amazon DynamoDB, Amazon Elastic Container Service (Amazon ECS), JSON Web Tokens (JWT), Redux, OAuth, JSX, Responsive Web Apps, Serverless, Subscriptions, Subscription Processing, Amazon EC2, Amazon S3 (AWS S3), Redis Cache, Amazon RDS, Amazon CloudWatch, Amazon CloudFront CDN, Back-end, Git, API Integration, Code Review, Cloud Platforms, Full-stack Development, Software Architecture, Estimations, Cloud Architecture, SMS, Minimum Viable Product (MVP), AWS SDK

Lead Full-stack Developer

2012 - 2018
Dream Studio Ltd
  • Contributed to multi-tenant eCommerce SaaS applications that ran with 99.999% uptime.
  • Created over a dozen eCommerce websites, some selling over 10,000 available products.
  • Reconsidered some fragile rules about customer agent coordination.
  • Played a significant role in the whole process, from the discovery phase of the technical assignment to the final delivery stage.
Technologies: PHP, Symfony, JavaScript, HTML5, CSS3, Amazon DynamoDB, Amazon Elastic Container Service (Amazon ECS), SaaS, Multitenancy, REST, AWS Cloud Architecture, NoSQL, Relational Databases, Amazon Web Services (AWS), Full-stack, Content Management Systems (CMS), Data Scraping, AWS CloudFormation, MySQL, HTML, CSS, UI Development, Less, NPM, Cloud Infrastructure, Docker, Microservices Architecture, SQL, APIs, Architecture, REST APIs, Web Development, Databases, Caching, Session Handling, PHP 5, PHP 7, Microservices, Amazon ElastiCache, JSON, XML, eCommerce, Marketplaces, Redux, OAuth, Responsive Web Apps, jQuery, Shopify, Subscriptions, Subscription Processing, Amazon RDS, Amazon CloudWatch, Amazon CloudFront CDN, Distributed Systems, Back-end, Application Architecture, Git, Leadership, API Integration, Code Review, Cloud Platforms, Full-stack Development, Software Architecture, Cloud Architecture, System Design, Payment APIs, Amazon Aurora, AWS SDK, Amazon Simple Queue Service (SQS)

Dreamshop.io

http://dreamshop.io
A multi-tenant SaaS eCommerce platform that allows users to start their own online business for free.

It was my first startup project where I acted as the lead developer from the day it started in 2014 until 2018.

Headless B2B Agrar eCommerce Platform

This headless eCommerce platform was built with Next.js on top of a Magento 2 back end. It has its separate authentication layer that uses AWS Cognito, as well as a responsive web design that supports all devices—from small mobile phones to 5K desktops.

I oversaw the back-end development and GraphQL integration. My work also included the Magento 2 product, cart, and order integration.

Real-time Sail Yacht Tracking and Racing App

A React native app that tracks yachts, scores them in races, and runs simple and complex handicap scoring methods. The app handles millions of data points per second, processes scoring data, propagates the data to spectators, and assesses crew performance. It is hosted on AWS and can automatically scale from virtually zero traffic to millions of requests per second.

Voice Chat and Video Communication Tool

A React-based voice chat and video communication tool used for internal company communication and team management. The application has its own proprietary communication protocol, which allows it to handle thousands of messages per second with a very low footprint. Users are able to send messages in real time, use a rich search engine, create groups and teams, manage tasks, and more. It uses Twilio for voice and video communication.
OCTOBER 2023 - OCTOBER 2026

AWS Certified Solutions Architect - Associate (SAA)

Amazon Web Services Training and Certification

SEPTEMBER 2023 - SEPTEMBER 2026

AWS Certified Developer - Associate (DVA)

Amazon Web Services Training and Certification

SEPTEMBER 2023 - SEPTEMBER 2026

AWS Certified Cloud Practitioner (CLF)

Amazon Web Services Training and Certification

SEPTEMBER 2018 - PRESENT

Twilio Certified Developer

Twilio

Libraries/APIs

Node.js, React, REST APIs, jQuery, Vue, Stripe, Stripe API, WebRTC, Facebook API, Google Ads API, Twilio API, Web3.js, Socket.IO

Tools

Amazon Elastic Container Service (Amazon ECS), AWS CloudFormation, Amazon ElastiCache, JSX, AWS SDK, Amazon Simple Queue Service (SQS), Auth0, NPM, Figma, GitHub, Stripe Checkout, Git, ChatGPT, AWS Step Functions, React Apollo, JetBrains, WebStorm, IntelliJ IDEA, Terraform, Twilio Programmable Video, Amazon CloudWatch, Amazon CloudFront CDN, Amazon Cognito, RabbitMQ, Jira, Prisma

Frameworks

React Native, Next.js, Express.js, JSON Web Tokens (JWT), Redux, Symfony, Laravel, Tailwind CSS, Bootstrap, Django, Jest, Material UI, Angular, Electron, NestJS, CodeIgniter, tRPC

Languages

PHP, JavaScript, TypeScript, HTML, CSS, SQL, PHP 5, PHP 7, XML, HTML5, CSS3, GraphQL, Less, SCSS, C++, Java, Rust, Python

Paradigms

REST, Microservices Architecture, Microservices, Application Architecture, DevOps, Mobile Development, Serverless Architecture

Platforms

Twilio, Amazon Web Services (AWS), AWS Lambda, Docker, Amazon EC2, Linux, MacOS, iOS, Vercel, Ably, Kubernetes, Shopify, Android, Magento API, Magento 2, Blockchain, AWS ALB, Azure

Storage

Amazon DynamoDB, NoSQL, Relational Databases, MySQL, Databases, JSON, Redis Cache, Redshift, PostgreSQL, Elasticsearch, Amazon S3 (AWS S3), Amazon Aurora, Azure Cosmos DB, MongoDB, MariaDB

Other

SaaS, Multitenancy, Full-stack, Content Management Systems (CMS), WebSockets, UI Development, Cloud Infrastructure, APIs, Architecture, Consulting, Mentorship, Web Development, Caching, Session Handling, eCommerce, Marketplaces, Distributed Systems, Back-end, Remote Team Leadership, API Integration, Code Review, Full-stack Development, Technical Leadership, Software Architecture, SMS, Minimum Viable Product (MVP), Web Security, Real-time Communication (RTC), System Architecture Design, AWS Cloud Architecture, Data Scraping, Front-end, Enterprise Systems, OAuth, Responsive Web Apps, Serverless, CTO, Mobile App Development, Technical Architecture, Leadership, Team Leadership, Cloud Platforms, Estimations, Technical Consulting, Cloud Architecture, System Design, Payment APIs, Messaging, Multimedia, Team Management, CI/CD Pipelines, Big Data, VoIP, Medical Software, Wireless Communication, Apollo Server, Web 3.0, Non-fungible Tokens (NFT), Cryptocurrency, Multicast, App Store, Google Play Store, Subscriptions, Subscription Processing, Stripe Subscriptions, Apollo, Amazon RDS, Responsive Design, User Interface (UI), Decentralized Finance (DeFi), Transmission Control Protocol (TCP), UDP, Near-field Communication (NFC), Monorepos, OpenAI GPT-3 API, AWS Certified Cloud Practitioner, AWS Certified Solution Architect, AWS Certified Developer, Startups

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