
Douglas
From Brazil (UTC-3)
19 years of commercial experience
Lemon.io stats
1
projects done536
hours workedOpen
to new offersDouglas – 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
Additional skills
Ready to start
To be verifiedDirect hire
Potentially possibleReady to get matched with vetted developers fast?
Let’s get started today!Experience Highlights
Tech Lead
Implementing Auth0, Segment, and Sendgrid platforms in an environment with Django Rest Framework as the Back-end and React as Front-end.
- 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.
Senior Java Developer
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.
- Created microservices using Spring Boot;
- Implemented integration with Salesforce APIs;
- Made integration with Apache Kafka.
Senior Consultant
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.)
- 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.
Senior Full-stack Web Developer
This is a global network of patient-focused communities, providing direct access to qualified patients across various therapeutic areas.
- 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.
Senior Java Developer
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.
- Created microservices using Spring Boot;
- Implemented integration with Salesforce APIs;
- Made integration with Apache Kafka.
Senior Full-stack Web Developer and Founder
This is a private enterprise platform like VMWare, which provides a set of tools to create virtual machines.
- 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.
Senior Python Developer
This is a tool for managing social networks, specifically in the hospitality market.
- 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).
Senior Full-stack Web Developer
This is a Process Management tool based on Kanban boards that empowers world-class managers to create and run efficient workflows.
- 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.
Senior Consultant
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.
- 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.
Associate Technical Manager
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.
- Designed Siebel solution for the client;
- Implemented Java integration to integrate Siebel with Legacy systems;
- Lead a team with 7 developers.
Co-Founder and Senior Developer
The project was a collection tool for hobbyists collecting Movies (DVD/Blurays, etc.), Comics, etc.
- Developed the UI using Angular.js;
- Built back-end using Django + Google App Engine;
- Created a scrapping tool using the Scrappy framework.