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Kaio – Node.js, React, JavaScript, experts in Lemon.io

Kaio

From Portugal (GMT+1)

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Full-stack Web DeveloperSenior
Hire developer
9 years of commercial experience
Automotive
Banking
Fintech
Public services
Retail
Tourism
Travel
ERP
Platforms
Video streaming software
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Kaio – Node.js, React, JavaScript

Every full-stack developer has their own preferences, and Kaio is no exception. Currently, he's primarily focused on backend development. Additionally, he brings a wealth of experience in JavaScript development, with some practice in DevOps tasks such as building CI/CD pipelines and overall architecture. Kaio is known for his quick learning ability and dedication to solving problems thoroughly. He thrives in team environments and has previous experience in leadership roles. With a strong commitment to productivity and delivering effective results, Kaio is a valuable asset for any project.

Main technologies
Node.js
5 years
React
4 years
JavaScript
5 years
Additional skills
React Native
C#
Ruby
Apollo GraphQL
Kubernetes
Docker
Microsoft SQL Server
AWS
Redis
RabbitMQ
PostgreSQL
MongoDB
Nginx
Angular
.NET
Python
Vue.js
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Senior Software Engineer
Jan 2023 - Ongoing1 year 5 months
Project Overview

One of the most promising scale-ups in Portugal and one of the best smart-locker companies in the world. Through its ecosystem, a hardware-agnostic solution to smart-locker networks, it has already launched thousands of smart-lockers across Europe for companies such as Vinted and DHL.

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Responsibilities:
  • Served as a mentor to the other engineers in the team, improving overall team discipline and enhancing their engineering principles and practices
  • Designed and Implemented a gradual mechanism for adding unit tests, without -disrupting day-to-day work and using the existing test tools and ecosystem
  • Drastically reduced the time to run our integration main pipeline (from 30min to ~8min), improving flow and shortening developer feedback times
  • Architected and presented PoCs on how to make our core systems even more flexible, aiming for our next-gen tech philosophy
  • Architected and implemented a generic integration layer between our core API and our client's APIs, providing for fast and seamless client integrations in record time
Project Tech stack:
Node.js
AWS
MQTT
Python
MongoDB
Redis
React
Vue.js
GitHub Actions
Software Engineer
Dec 2021 - Dec 20221 year
Project Overview

It is a genealogy company that helps people build their family trees. They also have a large amount of historical data that they use to create hints for users so they can find more about their ancestors through newspaper articles and official documents

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Responsibilities:
  • Was responsible for improving some key business metrics, such as user retention and engagement;
  • Used a data-driven, experiment-based approach, using A/B testing as the main tool for iterating on new and already existing features;
  • Managed to help the engineering team incorporate engineering best practices, such as unit testing and code reviews;
  • Helped the whole company to move the business numbers.
Project Tech stack:
Node.js
React
Apollo GraphQL
Kubernetes
Docker
Microsoft SQL Server
AWS
Software Engineer
Feb 2020 - Dec 20211 year 10 months
Project Overview

It is the leading train ticketing company in Europe that provides an easy, unified way of buying train tickets to anywhere in the European territory.

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Responsibilities:
  • Developed a feature based on caching, which helped to reduce the error rate for a specific carrier we were looking after;
  • Adapted to a new stack (Ruby), which he had zero experience with.
Project Tech stack:
Ruby
AWS
Redis
RabbitMQ
Docker
PostgreSQL
Node.js
Head of Engineering
May 2019 - Feb 20209 months
Project Overview

It is a monitoring platform that allows users to watch live streaming videos of urban areas, such as parks and streets, allowing them to create alerts in case anything seems suspicious. Also, it has a dedicated team to respond to these alerts and forward them to specific government institutions, such as the police and the firefighters, for instance.

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Responsibilities:
  • Interviewed and hired the members of the team;
  • Created the back-end structure using Node.js;
  • Configured all the cloud infrastructure needed, including CI / CD pipelines using AWS ECS, Docker, and GitHub Actions;
  • Led the team to deliver the first iteration of the product in just six months and then continued iterating on the first version to make it into the official product.
Project Tech stack:
Node.js
React
React Native
AWS
MongoDB
Redis
Microsoft SQL Server
Docker
Nginx
Tech Lead
May 2018 - Nov 20186 months
Project Overview

It is a project for one of the biggest banks in Brazil that is focused on reimplementing its virtual car market platform ahead of the biggest car event in Brazil, the "Salão do Automóvel".

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Responsibilities:
  • Built a new architecture on the platform, using .NET web APIs separated from the front-end structure (Angular), helping the managers to delegate tasks better and giving the teams more flexibility to work;
  • Refactored, fixed bugs, and developed new features on a large .NET API codebase;
  • Brought the Agile elements to the team, which helped to cultivate proactive behavior that reduced the unpredicted fail chances and possible obstacles to the development team;
Project Tech stack:
Angular
.NET
Microsoft SQL Server
Redis
AWS
Node.js
Senior Full-Stack Engineer
Oct 2017 - May 20187 months
Project Overview

It is an internal corporate platform that creates customized, ERP-like modules for clients. It includes a low-code platform that allows developers to create new modules using only Javascript and CSS.

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Responsibilities:
  • Rebuilt the internal invoicing system;
  • Performed platform-wide optimizations and refactorings on the core system;
  • Implemented migration scripts to handle millions of lines of data using Node.js streams.
Project Tech stack:
Node.js
Microsoft Azure
AWS
MongoDB
React

Education

2018
Science and Technology
Bachelor

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