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Hire the best JavaScript Developers in Rio de Janeiro, BR

Check out JavaScript Developers in Rio de Janeiro, BR with the skills you need for your next job.
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Clients rate JavaScript developers
Rating is 4.8 out of 5.
4.8/5
based on 793 client reviews
  • $45 hourly

    • 5.0/5
    • (2 jobs)
    Web developer mostly focused on frontend with the React framework, but also skilled with backend, desktop and mobile development. Over 7 years of experience both studying and working with React, almost since its original release in 2013. Highly skilled professional, having trained and worked with some of the best of my country.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Redux Saga
    React Native
    styled-components
    Front-End Development
    MongoDB
    HTML5
    Redux
    HTML
    Node.js
    TypeScript
    webpack
    React
  • $30 hourly

    • 4.6/5
    • (46 jobs)
    I am a full stack developer ready to help you solve your problems. I work as a software developer since 2011, and during these years I worked with a very diverse set of technologies and environments. I majored in Computer Science in 2013 and got a master's degree in 2016. I specialize in automation and web app development and have tons of experience with all the technologies involved in the process, from writing the code to deploying the project. I also love to discuss your projects and ideas, if you have questions about the process or want to bounce some ideas feel free to send me a message :)
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Web Application
    React
    Data Scraping
    ChatGPT
    Angular
    NoSQL Database
    Web Development
    Python Script
    Angular 2
    HTML
    MySQL
    MongoDB
    Python
    CSS
  • $40 hourly

    • 4.5/5
    • (15 jobs)
    Versatile Front-end developer, with main focus on e-commerce and CMS, having worked in over 100 different projects, between Magento, WooCommerce and Shopify, the most of them being in the latter. Familiarity with every step of the development process, having worked with Quality Assurance before, and discussing directly with designers to achieve the most effective design to be implemented. Specialized in Liquid. Stack: HTML, CSS, Sass, Javascript, Git, Shopify, Liquid, Magento/Adobe Commerce, Wordpress and ReactJS. Tailwind CSS, Less, Vue, Angular
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Bug Fix
    Liquid
    Adobe Illustrator
    Shopify Theme
    Shopify
    Front
    Web Development
    Sass
    CSS
    WordPress
    React
    Git
    HTML
  • $20 hourly

    • 5.0/5
    • (6 jobs)
    Developer Salesforce, Node JS and Python. Website creation. Visualforce and LWC. Community Sites (Experience Site) Salesforce REST APIs . Webhook and Api Salesforce. Knowledge of Apex and Test Classes. Knowledge of Python and application debugging. knowledge of Git and Salesforce deployment processes. I am proficient in manipulating databases and learn new technologies quickly. Query developer and ETL knowledge for data migrations Mastery in the use of Generative AI 'Chat GPT' and Gemini to assist in complex algorithms.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Sitebuilder
    Visualforce
    Data Migration
    Salesforce Service Cloud
    Salesforce Lightning
    RESTful API
    VB.NET
    Apex
    Salesforce
    .NET Core
    Node.js
    Salesforce App Development
    Oracle
    MySQL
  • $44 hourly

    • 4.4/5
    • (7 jobs)
    ⭐️ Top Rated ✅️ 100% Job Success Hire experience and get faster results! With over 25 years of expertise, I ensure your project reaches success efficiently and cost-effectively. As a Systems Engineer with deep expertise in technologies including Artificial Intelligence APIs, AI models like GPT and Gemini, integrations with N8N and Make.com (integromat) . Automation and integrations in several platforms. NoCode/LowCode with Softr, Flutter Flow and Bubble, OutSystems Python, .NET (VB.NET and ASP.NET), JavaScript, API, CSS, and HTML. Docker, VPS, Cloud Databases like Supabase, SQL Server or Oracle Let's discuss your needs in detail and turn your project into reality. Keywords: #AI #Prompt #Interagrion #Make.com #N8N #Softr #Supabase #Bubble #FlutterFlow #Airtable #N8N #Automation #GPT4 #Gemini #Outsystems #OpenAI #Python #.NET #API #QA #React #test #project #product #developer #vb6 #excel #issue #debug #front-end #ui #QA #business #fix #vb6 #access #sql #data #brazil #portuguese #english #low-code #Brazil #Scrum #developer #engineer #software #fine-tuning
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Visual Basic for Applications
    QA Testing
    Low Code & RAD Software
    Microsoft Azure
    Python
    React
    Amazon Web Services
    Microsoft SQL Server
    Visual Basic
    SQL
    HTML5
    CSS 3
    C#
    .NET Framework
  • $20 hourly

    • 5.0/5
    • (13 jobs)
    Exploring the infinite potential of game creation is genuinely inspiring. Throughout my journey as a game developer, I have consistently sought innovation, acquiring extensive knowledge in the field. My approach is centered on achieving tangible results, going beyond theory to implement a wide range of knowledge, from fundamental concepts to advanced solutions. I believe that sharing this experience can be a valuable source of assistance for all those interested in the dynamic and ever-growing universe of games. With a strong foundation in game development, I specialize in creating multiplayer gaming experiences, including MMORPGs, battle royales, and other genres. My expertise extends to integration with blockchain technology with smart contracts in solidity, and implementing robust data persistence solutions in databases. Overcoming challenges in these areas has not only expanded my technical skills but also reinforced my belief that nothing is technically impossible; the only variable is the time required for completion based on complexity.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Solution Architecture
    Blockchain, NFT & Cryptocurrency
    NFT Marketplace
    NodeJS Framework
    C++
    C#
    Unreal Engine
    Unity
    Solidity
    MySQL
    Multiplayer
    Blockchain
    Web3
    Game Development
  • $35 hourly

    • 5.0/5
    • (4 jobs)
    Hi! I'm a full-stack web developer fascinated by the programming world. I have 3 years of professional experience where I worked as a freelancer, a full-time employee, and the technical co-founder of a startup. I have an excellent understanding of the web and great skills in React.js, Node.js, Python, and Django.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    ExpressJS
    Material UI
    Socket.io
    Next.js
    React
    Django
    Node.js
    API
    Bootstrap
    Tailwind CSS
    HTML5
    Python
    TypeScript
    CSS 3
  • $67 hourly

    • 4.8/5
    • (67 jobs)
    🟣 Reference in Google Ads and Facebook Ads, responsible for creating campaigns plans for your goal. 🟤 2+ years experience as Software Engineer and Web Development. 🟠 Knowledge of the following tech stacks: ASP.NET, Blazor, Flutter, C#, Python, Javascript, HTML, CSS and Firebase. 🔵 Reference in Google Tag Manager Server Side/Web, creating custom script for each client website to track the journey of the users. I'm also a web developer, so you don't have to worry about me adding tags on your website. 🟢 Google Ads Certified. 🟡 Google Analytics Certified. ⚪️ GA4 Expert 🔷 These are my skills that may help you: 🔷 🔸As Advertiser and Data Analyst:🔸 🔹 Made or fix your website tracking using GTM Server Side/Web and set up Facebook Conversion API 🔹 Help you with your Merchant Center issues. 🔹 Be responsible to make a campaign planning for Google Ads, Facebook Ads, LinkedIn Ads or Pinterest Ads, show you and wait for your approval. ◾️ I'll made a plan taking into consideration your data, in case you have. If you don't have data, I'll taking into consideration your business, making a benchmark. 🔹 Add the new structure to your accounts. 🔹 Optimize the structure based on data and results. 💯 Let's talk, tell me how I can help you 💯
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Data Analysis
    Pay Per Click Advertising
    PPC Campaign Setup & Management
    Conversion Rate Optimization
    Retargeting
    Pixel Setup & Optimization
  • $45 hourly

    • 5.0/5
    • (2 jobs)
    I am a conscientious, results-driven, articulated and analytical software engineer with more than nine years of professional experience in the field of programming and databases. With strong ability to solve problems and manage priorities, i highly value teamwork and continuous learning.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    React
    Front-End Development
  • $40 hourly

    • 5.0/5
    • (2 jobs)
    Dedicated and efficient full stack developer with 15+ years experience in application layers, presentation layers, and databases.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    React
    CSS
    SQL
    DevOps
    React Native
    HTML
    Java
    Node.js
    Amazon Web Services
    Google Cloud Platform
    Microsoft Azure
  • $50 hourly

    • 5.0/5
    • (1 job)
    I'm a software architect with experience in architecting solutions using mainly Oracle Middleware and Cloud offerings and also developing said solutions both in the frontend and backend. If you are looking for a seasoned architect/developer, I can help. With 10+ years of experience working in big projects to both government and private clients I'm sure I'll be able to help you! I'm certified in Java and most Oracle Middleware products and I'm also an AWS certified solutions architect.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Oracle Integration Cloud Service
    Software Development
    Application Integration
    Business Process Execution Language
    Oracle SOA Suite
    Business Process Management
    Oracle Cloud
    Oracle Universal Content Management
    ADF Faces
    AWS Lambda
    C++
    Java
    TypeScript
    Docker
  • $35 hourly

    • 5.0/5
    • (4 jobs)
    - 5 years of experience working as a Full Stack Developer building and maintaining web applications, working on every part of the tech stack (backend, frontend, blockchain) - Proficient in the web ecosystem (JS/TS, Node.js & React, Vue/Laravel) and database operation for Firebase and both SQL and NoSQL with ORMs(TypeORM, MikroORM, Knex, Mongoose) - Familiar with cloud services (GCP, AWS, Azure) - Hands on experience in developing products for various businesses(Real Estate, Healthcare, Ecommerce, Construction, Accounting) - Developed AI applications integrating LLMs (Pygmalion, GPT-3) and Text Classification models - Good problem-solving and self-motivated
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Firebase
    Snowflake
    MongoDB
    Git
    Node.js
    React
    TypeScript
  • $40 hourly

    • 5.0/5
    • (1 job)
    I am a full stack developer with experience in both web2 and web3 technologies. I have built and deployed scalable and secure web applications using frameworks such as React, Node, MongoDB, Python, Rust, Solidity and much more. I am passionate about creating innovative and user-friendly solutions that leverage the power of the decentralized web. Talents and experience - Smart contracts development on EVM chains like Ethereum, BSC and BASE - Expertise in Solidity development tools and frameworks like Remix, Hardhat, Truffle and Foundry - Solana program development using Rust and Anchor framework - Strong knowledge of SPL and SPL token-2022 with their particular extensions - Dapp development using Solana SDK and web3 on Solana chain as well as dApps on EVM chains - Bots and scripts development for multiple chains including Ethereum, Polygon, Solana, etc targeting - large and useful protocols like Uniswap, Curve, AAVE, Raydium, Serum, Opensea, and much more - Knack for developing Trading bot, Arbitrage bot, MEV bot, Discord bot, Telegram bot, etc Web2 knowledge - Automatic bot and scrape experience using Python Selenium, Node Puppeteer, Multilogin application and much more - Strong skills in modern javascript frameworks like React, Vue - Familiar in popular frameworks and libraries like Next.js, Nuxt.js, Redux, and much more - DB management and API development using MongoDB, Postgresql, REST API, GraphQL
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Node.js
    Ethers.js
    web3.js
    MongoDB
    MySQL
    Vue.js
    Laravel
    PHP
    Redux
    Tailwind CSS
    Solidity
    Next.js
    TypeScript
    React
  • $40 hourly

    • 5.0/5
    • (1 job)
    I am a professional with expertise in using Unity for creating interactive and immersive experiences, JavaScript for frontend development, and Blockchain technology for implementing secure and decentralized applications. I'm skilled in building Unity games and applications, integrating frontend functionality with JavaScript, and incorporating Blockchain technology for secure transactions, data storage, and smart contracts. Likewise. I'm capable of creating innovative and cutting-edge projects that leverage the strengths of all three technologies to deliver unique and impactful experiences for users.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Cryptocurrency
    ERC-20
    Web3
    Blockchain
    WebGL
    HTML5 Canvas
    P5.JS
    React
    C#
    Unity
    Node.js
    TypeScript
    CSS
    HTML
  • $65 hourly

    • 5.0/5
    • (9 jobs)
    I'm an experienced consultant in development and architecture for full stack web and mobile solutions. I specialize in frameworks such as React & React Native and NodeJS/Express deployed to cloud platforms such as Amazon Web Services and Heroku. I have a degree in Product Strategy from Kellogg Executive Education School, I'm also a Certified Enterprise Architect (TOGAF) and Certified Java Programmer (Sun/Oracle). My goal in Upwork is to support clients getting high quality software. Here's how I can help: 1 - design the architecture of your system/application; 2 - structure and set key deliverables to your project; 3 - develop your app - I've been a developer for over 15 years and have been working with React Native specifically for nearly 4 years. 4 - set a development & QA team - define roles, perform interviews and handle day to day development management tasks; 5 - manage and collaborate to refine your product strategy; Previously I have worked for +10 years for Accenture first as a senior engineer, then as an enterprise and solutions architect. During that time, I have developed, designed and managed large scale implementations in different industries. I have worked with a broad spectrum of technologies and specialized in integration and cloud architectures. I left my corporate job to work part-time as a freelancer while I build the product for a startup I'm co-founding. The technologies I offer here are the technologies I use to build and scale our (quite complex) product, so rest assured I have a deep interest and grasp in those.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    J2EE
    Solution Architecture
    Android App Development
    iOS Development
    SQL
    React Native
    React
    GraphQL
    Node.js
  • $30 hourly

    • 4.7/5
    • (5 jobs)
    Cloud Engineer with solid expertise in building scalable applications, primarily by using a microservice architecture that has been giving support to businesses with a user base greater than 20M. Some technologies that I have been working with recently: - Kubernetes and AWS ECS as container orchestrators - Elastic Stack, Grafana, Prometheus, and AWS CloudWatch as logs and metrics manager - AWS CloudFront and Cloudflare as a content delivery network - RabbitMQ and AWS SQS + SNS as a message broker - Redis as a cache database - AWS CloudFormation, AWS CDK, Pulumi and Terraform to run infra as code - JavaScript and Python stacks
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    CI/CD
    DevOps
    Redis
    Docker
    Deployment Automation
    AWS CloudFront
    Python
    Terraform
    Kubernetes
    Amazon Web Services
    Microservice
    RabbitMQ
    React
    Node.js
  • $40 hourly

    • 5.0/5
    • (1 job)
    I am an excellent front-end web designer & developer. I have 7+years of experience in front-end website design and building. I have good skills in the following fields. - WordPress/Woocommerce - Shopify - RubyonRails - React/Angular/Vue - PostgreSQL -JavaScript - Bigcommerce (Stencil/Blueprint), Wix(Corvid), Weebly, Squarespace - Unbounce/Instapage/ClickFunnels/Sharpspring - Bootstrap3/Bootstrap4 My special is high-quality work and fast speed. Let's make our beautiful life together!
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    React
    Ruby on Rails
    Angular
    PostgreSQL
    Vue.js
    React Bootstrap
    WordPress
    HTML5
    Shopify
  • $60 hourly

    • 5.0/5
    • (2 jobs)
    * Web, Mobile, and Games Developer. * Web and UI Designer. * Modern frameworks like React and Vue * Over 10 years of experience.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    React Native
    Node.js
    React
    Vue.js
    D3.js
  • $65 hourly

    • 5.0/5
    • (1 job)
    Creative technologist, graphic designer and tech guru. I witnessed the internet development and growth. Since then, it's been 23 years creating experiences for engaging campaigns, millions of users, huge results and some awards. 15 years working for companies and 8 working with my company (fazemos.co) Do you need a logo? A website? An e-commerce solution? A digital marketing strategy? A game? A film? Talk to me.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Project Management
    Customer Experience
    User Experience Design
    Design Thinking
    Full-Stack Development
    KPI Metric Development
  • $15 hourly

    • 5.0/5
    • (3 jobs)
    👋 Hello and welcome to my profile! I am a full-stack developer with over a decade of programming experience, proficient in a broad range of technologies and solutions. I specialize in React/Next.js and Node.js development to bring versatile and functional web applications to life. Additionally, I master other tools that cater to diverse business needs, such as using web scraping to extract meaningful data, developing chatbots and virtual assistants, and creating versatile native desktop applications. Key Focus Areas: 🌐 React/Next.js Development • Harnessing the power of React and Next.js, I create dynamic, responsive, and visually stunning front-end interfaces that provide exceptional user experiences. Leveraging Node.js, I develop robust and scalable back-end solutions that drive seamless communication between servers and clients. I am well-versed in creating and integrating APIs, handling data, and managing server-side operations to deliver efficient and reliable solutions. 🖥️ Database Integration • Your data is safe within my applications! My proficiency extends to working with databases like PostgreSQL and Firebase. I architect data structures, implement robust data management, and ensure secure and reliable storage solutions for your projects. 🛠️ Web Scraping Mastery • My proficiency in web scraping allows me to gather and process data from various online sources, transforming raw information into valuable insights. Whether it's market research, data aggregation, or competitor analysis, I have the tools to extract and present data in meaningful ways, applying technologies such as Puppeteer and Selenium. 🤖 Chatbots, Web Automation, AI, and Other Cutting-Edge Technologies • I have extensive experience in developing chatbots for platforms such as the messaging app Discord, enabling businesses to provide instant support, gather user feedback, and automate repetitive tasks. I also have a great passion for innovative technologies. I've invested time in learning tools such as ChatGPT for intelligent conversational interfaces and AI-powered image generation with Stable Diffusion. Additionally, I have experience with computer vision and the OpenCV library. 💻 Desktop App Development • Beyond traditional web development, I utilize the power of React, Next.js, and Electron to bring your ideas to desktop applications with fluid user interfaces and a seamless user experience. I'm also well-versed in other programming languages like C#, C++, and Python, enabling the development of more complex algorithms. 🎮 Game Development • I also have significant experience and passion for game development, channeling my creativity and technical expertise to create captivating interactive experiences. I have knowledge in engines such as Unity, GameMaker, and Construct 3, enabling the creation of 2D and 3D games of various genres, such as platformers, RPGs, FPS, and more. As a dedicated freelancer, I approach each project with meticulous attention to detail and a commitment to delivering results that exceed expectations. Whether you require a sleek web application, a sophisticated automation solution, or a captivating game, I am eager to transform your vision into reality.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Automation
    Web Scraping
    Discord Bot Development
    Socket.io
    OpenCV
    HTML
    C#
    SQL
    TypeScript
    React
    Node.js
    PostgreSQL
    Next.js
    CSS
  • $5 hourly

    • 5.0/5
    • (6 jobs)
    I'm a Project Manager with background on IT and Marketing. Seeking for more international experience, i can bring to the table the following skills: -Proficient in data analysis tools and performance metrics. -Ability to lead and manage teams. -Comprehensive knowledge of agile methodologies and teamwork operation such as Scrum, Kanban, Agile. -Advanced mastery of Office tools for data analysis. -Solid experience with international communication. -Fluency in English & Portuguese -Aptitude for handling consumers and problem resolution. -Settlement and InVoice Calculations _Project Management and Task organization softwares
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    English to Brazilian Portuguese Translation
    Content Writing
    English
    Brazilian Portuguese Dialect
    Front
    TypeScript
    Front-End Development
  • $25 hourly

    • 5.0/5
    • (4 jobs)
    I have 4 years of building complete web experiences. An energetic and self-motivated professional, a confident and creative person with proven skills in setting and achieving goals while working both independently and as a team player. Efficient in meeting deadlines with an ability to prioritize and accomplish multiple tasks without compromising efficiency. Strong skills in JavaScript, Git, Vue.js, React, Next.js, Typescript, Nuxt.js, SASS, Tailwind CSS, Express.js, Figma, Python, Jest, Django, Node.js, and Redux. I am also a computer science student, constantly expanding my knowledge and staying up-to-date with the latest technologies.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Laravel
    Figma
    Full-Stack Development
    Tailwind CSS
    TypeScript
    Vue.js
    Sass
    Git
    Next.js
    Redux
    Nuxt.js
    Front-End Development
    Node.js
    React
  • $70 hourly

    • 0.0/5
    • (0 jobs)
    I am a software developer with experience in back-end development, specializing in building web applications using a variety of technologies and frameworks. - I have experience with Java, Spring, Relational and Non-Relational Databases, AWS Services, Splunk, among others. - I am passionate about building efficient and scalable solutions and am always looking for new challenges to develop my skills. - I believe that transparent communication can ensure the success of the project, so let's keep in touch! If you need APIs for integration, developing web applications, or other possibilities, count on me.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Software
    NoSQL Database
    Architecture
    Cloud Computing
    Test Development
    Spring Framework
    Git
    Spring Boot
    SQL
    Java
    Amazon DynamoDB
    Back-End Development
    Spring Data
  • $30 hourly

    • 5.0/5
    • (8 jobs)
    I am Victor Douglas, a skilled Web developer with Frontend and Backend development expertise. With over 7 years of experience, have worked on a variety of projects ranging from e-commerce websites to mobile applications. ⚡️ DEVELOPMENT SKILLS: - Languages: HTML, CSS, JavaScript, Typescript, PHP, Python, Ruby, Java, C#. - Frontend Techs: React, NextJS, GatsbyJS, Vue.js, NuxtJS, Angular. - Crypto: web3, solidity, ERC-20, ERC-721, Hardhat, Truffle, Ethereum, Binance - Backend Techs: NodeJS, NestJS, Express, Laravel, Django, .NET, FLask. - CSS frameworks: Bootstrap, Tailwind CSS, Kendo UI, Material UI, Chakra UI, Ant Design - Version Control: Git, Github, Gitlab, AWS CodeCommit. - Database: MongoDB, PostgreSQL, Mysql. - Collaboration Tools: JIRA, Slack, Trello. 💪 Strengths: • Attention to detail: I take pride in delivering high-quality work that meets clients' specifications and exceeds their expectations. • Communication: I understand the importance of clear and effective communication throughout a project. I am responsive to client's needs and provide regular updates on progress. • Problem-solving: I enjoy tackling complex challenges and finding creative solutions to problems. Thank you for considering my profile. I look forward to working with you on your project.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    ERC-721
    Binance NFT
    Ethereum
    Web3
    Smart Contract
    Solidify
    Laravel
    Vue.js
    Angular
    React
    PHP
    TypeScript
    CSS
    HTML
  • $18 hourly

    • 5.0/5
    • (1 job)
    I'm a 2-year junior front-end developer with experience building websites for small businesses. Help create or improve layout and performance of their websites. Work with HTML and CSS3, Javascript, TypeScript, NextJS and Version Control System (GIT) languages Complete project management from start to finish.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    TypeScript
    Tailwind CSS
    Git
    Next.js
    React
    Front-End Development
  • $8 hourly

    • 5.0/5
    • (1 job)
    Junior Developer experienced in building websites for small businesses. Excellent communication and customer service.
    vsuc_fltilesrefresh_TrophyIcon JavaScript
    Front-End Development
    Python
    HTML5
    CSS Grid
    CSS 3
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help. asdjlks jskd jaklsd
    vsuc_fltilesrefresh_TrophyIcon JavaScript
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