Levente Danel

Levente Danel

Full-Stack Developer & Entrepreneur

About Me

Senior Full-Stack Developer interested in microservices and AWS.

Summary

I have 15+ years of software development experience covering most areas of the development lifecycle. With a strong background in object-oriented software development, I have experience in a wild range of areas including web applications, database design and microservices in various industries like e-commerce and capital markets.

I'm a fast learner, flexible, up to date with new technologies and interested in modern software development methodologies.

Well versed in self-management, I work best in a remote environment, but I'm able to collaborate and communicate with potential customers and team members as well.

I'm passionate about working with motivated people and getting things done. Having been a lead developer I also have the skills to lead small cross-functional teams.

I'm actively looking for a job, so feel free to contact me at levente.danel@gmail.com

Co-Founder, Senior Full Stack Developer - Remote

Option Traders

September 2014 - Present

  • Helped to architect an automated trading application for financial instruments using a microservice architecture with large volumes of data
  • Ensured scalability of services by migrating the application into the cloud
  • Reduced historical quotes database size by filtering out redundant data and thus increased back-tests’ stream processing speed by almost 300%
  • Designed and developed a strategy builder service with concurrent back-testing features which reduced the R&D time of trading strategies by 80%
  • Implemented several indicators/algorithms to identify best trade entry and exit points
  • Built a trade journal and reporting tool to keep track of the trades and results
  • Contributed to open source by publishing an Interactive Brokers TWS API client library for Node.js

Tech stack: Node.js, Laravel, PostgreSQL, MongoDB, TypeScript, React, GraphQL, Jest, Material-UI, HTML5, CSS3, Git

Co-Founder

Uleiuri Esentiale

June 2017 - Present

  • Contributed to the marketing and sales strategies by valuable insight
  • Oversaw the development and maintenance of the web-shop
  • Improved user experience by ensuring the responsiveness of the web shop
  • Contributed to the marketing and sales strategies by questioning weak spots of the marketing funnel (problem analysis, critical observation, critical thinking)
  • Assisted on business strategy planning

Co-Founder

Endivia

June 2016 - April 2017

  • Oversaw the full development lifecycle of the web-shop
  • Improved user experience by ensuring the responsiveness of the company's web shop
  • Created a complex tool to simulate projected growth and daily operation costs in each stage of growth
  • Well-versed in goal setting contributed to the marketing and sales strategies
  • Suggested business process and operational improvements

Lead Developer - Remote

Jammin` Butter

April 2009 - April 2018

  • Successfully achieved the business goals by leading a small, agile, distributed, cross functional team
  • Managed time-sensitive operations excellently prioritizing, delegating tasks, and performing well under pressure
  • Contributed to smooth daily operations by successfully collaborating with other departments
  • Helped increase team productivity by 30% conducting regular code-reviews, writing code documentation, and mentoring team members
  • With a keen sense of responsibility assisted the management by offering constructive feedback to the decision makers on strategic decisions in development
  • Achieved sales growth of 50% per year after developing a multi-site e-commerce system using synchronous Web- and other third-party services
  • Optimized the processes to support the increasing traffic (100k users daily)
  • Simplified the checkout process by creating a custom shopping cart system using design patterns
  • Decreased launch time for new webshops by developing reusable modules
  • Improved warehouse management by designing an inventory system
  • Contributed to transaction fee optimization by coordinating the development of a round robin system for payment gateways
  • Enhanced user experience on web shops by building a complex product configurator
  • Assisted customer acquisition by designing a customer referral system with configurable multi-level bonus plan
  • Integrated a third party product and membership subscription management API

Tech stack: PHP, Laravel, MySQL, SOAP, JavaScript, jQuery, REST, Bootstrap, HTML5, CSS, Git

Senior Web Developer - Remote

Razor Media

April 2007 - August 2009

  • Built 6 responsive “daily deal” type e-commerce sites from scratch which helped to increase the customer base by 500% in 2 years
  • Increased sales by 300% developing auction, product subscription, membership and affiliate marketing modules
  • Improved code readability and site performance up to 70% by redesigning databases and refactoring legacy code
  • Contributed to company sales by making improvements to an auctions site
  • Contributed to conversion rate improvement by creating custom deal scheduler modules
  • Collaborated with other team members (e.g. project manager, software developers, graphic designers, quality assurance)
  • Worked on projects without detailed instructions
  • Successfully managed completing tasks and collaborating from a remote position (self-management) in a punctual manner

Tech stack: PHP5, CakePHP, SOAP, REST, MySQL, jQuery, Javascript, Bootstrap, HTML, CSS

Software Engineering Intern

Continental

March 2008 - June 2008

  • Built a tool for computation of fractional values on integer used in embedded systems

Tech stack: C# , C++, XML

Web Developer

Sofa Soft

July 2005 - April 2007

  • Contributed to ERP software development of a cooling equipment service company
  • Developed a catering management software for a local factory
  • Developed UIs for touch screen barcode readers
  • Improved the custom CMS, CRM system of the company
  • Built static and dynamic websites

Tech stack: PHP4, PHP5, Qcodo, MySQL, PostgreSQL, Javascript, HTML, CSS

My Work

Check out some of my projects...

The Auction House

Accomplishments

  • Node.js microservices with Lambda functions deployed on AWS
  • Data persistence with DynamoDB
  • Notification with SQS and SES
  • Authentication with Auth0
  • React front-end with Redux
  • Responsive design with Material-UI

Ticket Marketplace

Accomplishments

  • Event-Based Microservices in Node.js
  • CI/CD with Github Workflows and deployed with Kubernetes on DigitalOcean
  • Event bus with NATS streaming
  • Data persistence with MongoDB
  • Payment processing with Stripe
  • Front-end with Server Side Rendered React
  • Responsive design with Bootstrap

Instagram Clone

Accomplishments

  • Backend with Express.js
  • JWT-based authentication
  • REST API with Express Router
  • Data persistence with MongoDB
  • React front-end with Redux
  • Responsive design with styled components and Materialize CSS

Task management

Accomplishments

  • Backend with NestJS framework(Typescript) deployed on AWS Elastic Beanstalk
  • JWT based authentication and API authorization guard with Passport
  • REST API with Express Router
  • Data persistence with MySQL
  • Custom validators and decorators
  • Typescript React front-end with Redux
  • Responsive design with styled components and Material-UI

IB API client

Accomplishments

  • Node.js version of Interactive Brokers' TWS/IBGW API official client library
  • Handler for 70+ TWS API commands and responses
  • Communication via sockets
  • Built in retries on lost TWS API connection
  • Builder classes for contracts and orders
  • Rate limiting
  • Queue for commands and responses

Trading Journal

Accomplishments

  • Laravel backend with MySQL database
  • Import feature using Interactive Brokers trade execution reports
  • Trades can be grouped together based on tactics and strategies
  • Possibility to take notes on trades
  • Complex trade filtering and search feature
  • Supports multiple client accounts/advisor account
  • SSR front-end with Vue.js

Pet Treater

Accomplishments

  • PHP7 backend with MySQL database
  • Product subscription feature
  • Recurly integration for recurring payments
  • Affiliate Program with multi-level compensation plan
  • Server side rendered pages with cache
  • Front-end with Jquery and Vanilla Javascript
  • Responsive design with Bootstrap

13 Deals

Accomplishments

  • PHP7 backend with MySQL database
  • Webshop with categories and configurable products
  • Monthly Product subscription feature
  • Recurly integration for payments
  • Points based reward program
  • Server side rendered pages with cache
  • Front-end with Jquery and Vanilla Javascript
  • Responsive design with Bootstrap

That Daily Deal

Accomplishments

  • PHP7 backend with MySQL database
  • One deal a day type site
  • Monthly Product subscription feature
  • Affiliate Program with multi-level compensation plan
  • Server side rendered pages with cache
  • Front-end with Jquery and Vanilla Javascript
  • Responsive design with Bootstrap

Uleiuri Esentiale

Accomplishments

  • Customized Wordpress site
  • Woocommerce with custom plugins
  • MailChimp and ManyChat integration
  • Server side rendered pages with cache
  • Front-end with customized theme
  • Responsive design with Elementor

My Skills

Technologies I'm familiar with...

Back-End

Node.js
Node.js
PHP
PHP
MySQL
MySQL
PostgreSQL
PostgreSQL
MongoDB
MongoDB
Laravel
Laravel
NestJS
NestJS

Front-End

Javascript
Javascript
React
React
jQuery
jQuery
HTML5
HTML5
CSS3
CSS3
Bootstrap
Bootstrap
Sass
Sass

Others

Typescript
Typescript
Jest
Jest
GraphQL
GraphQL
Git
Git
Docker
Docker
Serverless
Serverless
Kubernetes
Kubernetes
Amazon AWS
Amazon AWS

Contact Me

This is how you can reach me...