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Matheus – React, React Native, JavaScript, experts in Lemon.io

Matheus

From Germany (GMT+1)

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Full-stack Web DeveloperSenior
Tech lead
Hire developer
10 years of commercial experience
Beauty
Cryptocurrency
E-commerce
Entertainment
Fintech
Gamedev
Logistics
NFT
Retail
Enterprise software
Mobile apps
Platforms
Web3
Gaming software
Lemon.io stats
3
projects done
438
hours worked
2
offers now 🔥

Matheus – React, React Native, JavaScript

Ten years in the IT industry indicate that Matheus is well-versed in complex tasks. As a Team Lead, his robust technical expertise, practical skills, and positive demeanor make him the ideal developer you need to build your dream team. Matheus specializes in React.js, React Native, TypeScript, Ruby on Rails, Node.js, and, more recently, Elixir!

Main technologies
React
5 years
React Native
4 years
JavaScript
6 years
Ruby on Rails
4 years
Typescript
4 years
Next.js
2 years
Ruby
4 years
Additional skills
Node.js
Redis
GraphQL
GCP
ElasticSearch
Kubernetes
MongoDB
Firebase
AWS
Heroku
Microsoft SQL Server
Elixir
Microsoft Azure
CI
Blockchain
Vue.js
Vercel
PostgreSQL
OpenAI
Docker
Python
Angular
Rewards and achievements
Client's favourite
Ready to start
As soon as possible
Direct hire
Potentially possible

Experience Highlights

Chief Technology Officer (CTO)
Sep 2022 - Jul 202310 months
Project Overview

A leading trivia platform designed to provide players with a unique multiplayer experience, featuring player-versus-player modes, real-time trivia battles, and a variety of game modes suitable for trivia enthusiasts of all levels.

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Responsibilities:
  • Set the technical vision and roadmap for the product, ensuring the platform's scalability to support thousands of concurrent players.
  • Led a multidisciplinary team of software developers, game designers, and QA testers, fostering a collaborative environment and boosting productivity by 30%.
  • Oversaw the transition to a microservices architecture, resulting in a 50% reduction in server costs and a 40% improvement in response times.
  • Integrated WebSocket technology, allowing real-time trivia battles and seamless player interactions.
  • Implemented robust security measures to protect player data and prevent cheating, resulting in a 95% reduction in malicious activities.
  • Introduced three new game modes, increasing player engagement and retention by 25%.
  • Established a CI/CD pipeline, reducing the deployment time by 70% and ensuring seamless game updates.
  • Incorporated advanced analytics and monitoring tools, enabling data-driven decisions which led to a 20% increase in monthly active users.
  • Worked closely with the marketing and business teams to ensure the technical feasibility of promotional events, which increased player acquisition by 30%.
  • Introduced a mentorship program within the tech team, ensuring continuous skill development and reducing turnover rate by 15%.
Project Tech stack:
React
Ionic
Typescript
Ruby on Rails
Node.js
Redis
Next.js
Tailwind CSS
SPA
Full-Stack Web Developer
Jul 2021 - Aug 20221 year 1 month
Project Overview

A large marketplace for cool & fancy products. The scheduled deliveries feature a relatively new product that allows scheduling purchases later on and paying in more than 8 different payment methods.

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Responsibilities:
  • Suggested and created the front-end and back-end architecture;
  • Implemented responsive designs;
  • Built front-end components library;
  • Debugged and resolved the application issues using tools like Sentry, ElasticSearch, and Kibana;
  • Wrote unit using Jest;
  • Integrated with different payment providers such as Paypal and Stripe.
Project Tech stack:
Next.js
Node.js
GCP
CDN
Axios
Kibana
ElasticSearch
Sentry
React
PayPal Api
Stripe API
Tailwind CSS
Tech Lead
Aug 2021 - Jul 202211 months
Project Overview

E-commerce helps to shop for favourite brands online from mobile or desktop. They provide the fastest delivery to the doorstep in less than 2 hours.

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Responsibilities:

  • Designed and implemented scalable APIs and background workers;
  • Led the development of several products E2E, from identifying system requirements and partner dependencies to workload balancing, software implementation, engineering, testing, and configuring metrics, alarms, monitors, and dashboards;
  • Enriched system metrics by integrating the platforms with telemetry; facilitated in-depth logging by correlating APIs with vector contexts;
  • Implemented continuous integration, deployment Pipeline Integration, pull requests, code reviews, load/stress testing, unit, integration, and e2e testing;
  • Used Git and Gitlab to manage the repository;
  • Led a team of 8 engineers and successfully achieved more than 30 million Euros raised and expanded to different countries;
  • Managed first- and third-party proprietary licenses that serve millions of requests daily.
Project Tech stack:
React Native
Node.js
JavaScript
Kubernetes
MongoDB
Error tracking tools
Unit testing
API
Firebase
e2e testing
Git
GitLab
Senior Front-End Developer
Nov 2021 - Jul 20228 months
Project Overview

A cryptocurrency game.

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Responsibilities:
  • Designed interactive game interfaces;
  • Integrated Web3 for in-game transactions;
  • Collaborated with a team of 5 developers to ensure smooth gameplay.
Project Tech stack:
React
Solidity
Ethereum
web3.js
Full-Stack Web Developer
Aug 2020 - Aug 20211 year
Project Overview

A web platform for discovery, bookings, and payments in the areas of Wellness and Beauty, powered by a virtual wallet and an ecosystem of benefits and cashback.

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Responsibilities:
  • Developed a web platform and a mobile app to allow customers and listings to find product's services via geo-location or searching by specific terms;
  • Implemented enterprise applications of administration content Experiment Platforms using Ruby on Rails, React.js, AWS, and Redis;
  • Used cloud services via AWS and Heroku to manage the deployment;
  • Automated and optimized business logic for the core marketing experiments, including A/B, Auto-Targeting, and Multivariate Testing;
  • Used Elixir (Phoenix Framework) and Ruby on Rails to provide the API and the admin panel.
Project Tech stack:
Redis
Ruby on Rails
Elixir
Phoenix
React Native
AWS
Terraform
Firebase
JavaScript
Typescript
Next.js
React
Heroku
Lambda
Amazon S3
Multivariate Testing
Microsoft SQL Server
Elixir
Phoenix
Google API and Services
Tailwind CSS
SPA
Tech Lead
Dec 2020 - Mar 20213 months
Project Overview

A Global B2B SaaS, empowers you to launch your own white-label NFT store or NFT Marketplace without any technical knowledge

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Responsibilities:
  • Oversaw the development team;
  • Ensured the secure integration of smart contracts;
  • Worked on optimizing loading times for high-resolution NFTs.
Project Tech stack:
Vue.js
Ethereum
Smart contracts
IPFS
Full-Stack Web Developer
Dec 2017 - Apr 20191 year 3 months
Project Overview

One of Brazil's largest segmented e-commerce platforms. The app allows requesting Gas from the service in a fast, practical, and easy way, scheduling purchases, scheduling the next order, or ordering a cylinder immediately through the app.

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Responsibilities:
  • Designed and implemented enterprise fintech and administration applications;
  • Was an engineering owner of the E2E experience of the commerce platform's cancel, return, and exchange systems;
  • Integrated multiple third-party systems with the escrow platform, increasing global revenue and speeding up the charts and reports functionalities;
  • Drove monthly revenue of billion of reals using Ruby on Rails, AWS Services, MVC, MySQL, Node.js, React, Redux, and React Native.
Project Tech stack:
React Native
React
Ruby on Rails
Redis
Microsoft Azure
Node.js

Education

2020
Computer Engineer
Bachelor's Degree
2020
Artificial Intelligence and Database Management
Master's Degree

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