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Douglas – React, Python, Node.js, experts in Lemon.io

Douglas

From Brazil (GMT-3)

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Full-stack Web DeveloperSenior
Tech lead
Hire developer
18 years of commercial experience
Communications
Entertainment
Healthcare
Hospitality
Productivity
Telecommunications
Communication tools
CRM
Customer support software
DBMS
Enterprise software
Mobile apps
Platforms
Gaming software
Lemon.io stats
1
projects done
536
hours worked
1
offers now 🔥

Douglas – React, Python, Node.js

Douglas is a skilled Senior Full-Stack Developer with extensive experience in technical and leadership roles. He is proficient in databases, AWS networking, front-end development, and multiple programming languages, including Python, Node and React. His strong live-coding skills enable him to identify and implement innovative solutions in a timely manner. Additionally, Douglas's excellent communication skills make him a valuable team member.

Main technologies
React
7 years
Python
6 years
Node.js
6 years
Django
5 years
Next.js
0.5 year
Additional skills
Ruby on Rails
Firebase
Java
Elixir
PHP
Laravel
Angular JS
AWS
CI/CD
Typescript
Angular
Kafka
PostgreSQL
MySQL
Oracle
Linux
Express.js
Spring
Kubernetes
Django REST
Docker
GCP
Vue.js
FastAPI
OpenAI API
Ready to start
05/27/2024
Direct hire
Potentially possible

Experience Highlights

Tech Lead
Aug 2022 - Jun 20239 months
Project Overview

Implementing Auth0, Segment, and Sendgrid platforms in an environment with Django Rest Framework as the Back-end and React as Front-end.

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Responsibilities:
  • Led a team of 3 developers and 1 QA;
  • Successfully regained the client's trust through demonstration of technical expertise;
  • Designed and implemented Auth0 authentication using Django Rest Framework and React;
  • Incorporated Segment.io to track user behaviors, necessitating modifications to both the backend and frontend code to enable effective tracking;
  • Created a Newsletter system that utilizes Sendgrid as the backend for seamless email campaign delivery.
Project Tech stack:
Django
React
Python
Auth0
Senior Java Developer
Dec 2021 - Aug 20227 months
Project Overview

This is a leading broadband connectivity company and cable operator serving more than 32 million customers in 41 states through its Spectrum brand. Over an advanced communications network, the company offers a full range of state-of-the-art residential and business services, including Spectrum Internet, TV, Mobile, and Voice.

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Responsibilities:
  • Created microservices using Spring Boot;
  • Implemented integration with Salesforce APIs;
  • Made integration with Apache Kafka.
Project Tech stack:
Java
Microservices
Kubernetes
Docker
Spring
Spring MVC
Spring Boot
Salesforce
Senior Consultant
Jul 2021 - Apr 20228 months
Project Overview

This company provides support worldwide for clients that need help for:

  • Development of new features using supported technologies (Siebel, Oracle, Java, Python, etc).
  • Supporting production workloads and servers (Python for analyzing logs, Linux, Unix, AIX, Windows, etc.)
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Responsibilities:
  • Attended to more than 10 clients around the world, being a Technical Account Leader for 4 of them;
  • Implemented solutions for reading and interpreting Logs using Python;
  • Helped implement Java solutions for connecting and integrating with Siebel, and Oracle.
Project Tech stack:
Python
Linux
Unix
Java
Oracle
Oracle SQL Developer
Senior Full-stack Web Developer
Jul 2020 - Nov 20211 year 3 months
Project Overview

This is a global network of patient-focused communities, providing direct access to qualified patients across various therapeutic areas.

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Responsibilities:
  • Helped to move from monolith to microservices structure using AWS Lambda;
  • Created the new Front-end using Typescript and React;
  • Built React component library using Storybook;
  • Integrated with Twilio API, AWS SNS, AWS SQS, DynamoDB, etc;
  • Worked as a Full-stack developer using Node.js on the Back-end and React+Redux on the Front-end;
  • Implemented microservices structure using AWS Lambda;
  • Used AWS SQS as queues for sending client emails (AWS SES) and SMS;
  • Created video call rooms using Twilio API along with AWS Lambda;
  • Published events to an Elastic Search cluster that was used for analytics.
  • There was a specific part of the project, where dynamic content was supposed to be shown in a SEO-friendly page. For that specific part we decided to go with the Next.JS framework because of its SSR capabilities. NextJS was a backend layer connected to our API.
Project Tech stack:
React
Node.js
Twilio API
AWS
AWS Lambda
AWS CloudFormation
Next.js
Senior Java Developer
Dec 2018 - Dec 20202 years
Project Overview

This is a leading broadband connectivity company and cable operator serving more than 32 million customers in 41 states through its Spectrum brand. Over an advanced communications network, the company offers a full range of state-of-the-art residential and business services, including Spectrum Internet, TV, Mobile, and Voice.

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Responsibilities:
  • Created microservices using Spring Boot;
  • Implemented integration with Salesforce APIs;
  • Made integration with Apache Kafka.
Project Tech stack:
Java
Spring Boot
Spring
Kubernetes
Apache Kafka
Senior Full-stack Web Developer and Founder
Nov 2017 - Mar 20202 years 4 months
Project Overview

This is a private enterprise platform like VMWare, which provides a set of tools to create virtual machines.

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Responsibilities:
  • Founded a company based on a product for allowing Nutanix users to create a Multitenancy environment allowing them to sell their cluster capacity using VMs;
  • Built a project based on the need of a Trinidad y Tobago client and also sold it to clients in the US;
  • Built the entire MVP, hired a new developer, and led them to create new features;
  • Coded the MVP using Laravel + React;
  • Integrated with Nutanix APIs.
Project Tech stack:
React
Node.js
Express.js
PostgreSQL
API
Senior Python Developer
Dec 2017 - Dec 20181 year
Project Overview

This is a tool for managing social networks, specifically in the hospitality market.

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Responsibilities:
  • Implemented the Back-end using Django Rest Framework;
  • Implemented Authentication using Simple JWT;
  • Helped on the Front-end team using React + Redux;
  • Handled Social network APIs with specific libraries for each Social network plus Requests library for doing some scrap;
  • Integrated code with Facebook, Twitter, and Instagram (Instagram using non-official API via browser automation with Selenium).
Project Tech stack:
Python
Django REST
React
Redux
Senior Full-stack Web Developer
Jul 2016 - Dec 20165 months
Project Overview

This is a Process Management tool based on Kanban boards that empowers world-class managers to create and run efficient workflows.

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Responsibilities:
  • Wrote code using Ruby on Rails on the back end and React + Redux on the front end;
  • Implemented the very first microservice for the tool using Elixir (Phoenix Framework) and connected it to React Front-end. Using JWT token as authentication.
Project Tech stack:
React
Ruby on Rails
Elixir
JavaScript
Heroku
Senior Consultant
Oct 2014 - Jun 20161 year 7 months
Project Overview

Working with this company, Douglas has participated in many projects with clients like Roche, Sanofi Aventis, Serasa Experian, Telefonica, etc. He obtained experience with a large number of technologies like Siebel, Java, Python, Spring, Oracle, Salesforce, and more.

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Responsibilities:
  • Worked as Solutions Architect in a project replacing Siebel with Salesforce;
  • Integrated CRM solutions with eCommerce using Java and Spring Framework;
  • Used Python to create and maintain a configuration analysis tool that helped compare Siebel environments.
Project Tech stack:
Oracle
Oracle SQL Developer
PL
SQL
Laravel
Java
Java EE
Core Java
Python
Spring
Salesforce
Associate Technical Manager
Oct 2013 - Oct 20141 year
Project Overview

Helped implement a system with Siebel for TIM’s post-paid mobile phone service. Managed a team of five other Siebel consultants to assist in the project. Designed solutions for the company’s database.

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Responsibilities:
  • Designed Siebel solution for the client;
  • Implemented Java integration to integrate Siebel with Legacy systems;
  • Lead a team with 7 developers.
Project Tech stack:
Oracle
Oracle SQL Developer
PL
SQL
Java
Java EE
Jira
XML
Co-Founder and Senior Developer
Nov 2012 - Nov 20131 year
Project Overview

The project was a collection tool for hobbyists collecting Movies (DVD/Blurays, etc.), Comics, etc.

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Responsibilities:
  • Developed the UI using Angular.js;
  • Built back-end using Django + Google App Engine;
  • Created a scrapping tool using the Scrappy framework.
Project Tech stack:
Django
Angular
Google App Engine

Education

2008
System Information Technology
Technologist

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