Upwork home
Sign up
Secondary

Hire the best JavaScript Developers in San Jose, CA

Check out JavaScript Developers in San Jose, CA with the skills you need for your next job.
Hire freelancers
Clients rate JavaScript developers
Rating is 4.8 out of 5.
4.8/5
based on 2,042 client reviews
  • $70 hourly
    • 5.0/5
    • (8 jobs)
    15 years of experience developing custom full LAMP stack solutions. DBA for multiple companies with millions of rows of data. Completed both front-end and back-end programming for various industries: medical, traditional retail, child care, ecommerce. I have trained in C, C++, Java, Perl, Assembly, PHP, and JavaScript. I am familiar with Python, node.js, MySQL, GraphQL, jQuery, WordPress, Shopify, and most Google Cloud and Amazon AWS services. I most commonly work in PHP, JavaScript, Google Cloud, and WordPress. I can assist in improving or building any website, web application, or API. I am comfortable reading pages of documentation or reverse engineering previously abandoned or outdated projects. I am very detail oriented, communicate exactly what is needed, and do my best to point out blind spots or potential future issues. I know what works, what doesn't work, and what can be compromised. Whatever your project is, I would be a helpful addition.
    Featured Skill JavaScript
    Google Maps API
    HTML5 Canvas
    Django
    GraphQL
    Python
    Google Cloud Platform
    Google Analytics
    Google Ads
    BigQuery
    LAMP Stack
    PHP
    HTML
    CSS
    MySQL
  • $55 hourly
    • 5.0/5
    • (3 jobs)
    𝗦𝘁𝗼𝗽 𝗗𝗿𝗲𝗮𝗺𝗶𝗻𝗴, 𝗦𝘁𝗮𝗿𝘁 𝗟𝗮𝘂𝗻𝗰𝗵𝗶𝗻𝗴: 𝗧𝘂𝗿𝗻 𝗬𝗼𝘂𝗿 𝗔𝗽𝗽 𝗩𝗶𝘀𝗶𝗼𝗻 𝗶𝗻𝘁𝗼 𝗥𝗲𝗮𝗹𝗶𝘁𝘆 (𝗙𝗮𝘀𝘁!) 🚀 Tired of ideas stuck in your head or wasting time/money on slow development? I transform business visions into powerful, revenue-generating web & mobile applications – delivered on time and built to scale. Specializing in: ✅ Flutter Apps: Build stunning, native-feeling iOS & Android apps with one codebase. (Save time & budget!) ✅ React/Next.js Web Apps: Create blazing-fast, SEO-optimized web experiences that convert visitors. ✅ Bubble.io MVPs: Validate your idea lightning-fast with a functional no-code prototype. ✅ MERN Full-Stack: Develop secure, feature-rich web apps from front to back. Why Partner With Me? ✨ End-to-End Ownership: Your project, from whiteboard sketch to live deployment. ✨ Future-Proof Code: Clean, maintainable architecture using industry best practices. ✨ Stress-Free Process: Agile sprints, crystal-clear updates, and zero-surprise deadlines. ✨ Guaranteed Satisfaction: 100% client-focused delivery. Your success is my priority. Ready to build something amazing? Let's connect and discuss how I can bring your app idea to life – efficiently and effectively. Message me today! (Limited slots available)
    Featured Skill JavaScript
    TypeScript
    Payment Gateway
    Firebase
    API Integration
    MongoDB
    Node.js
    Mobile App Development
    Full-Stack Development
    Bubble.io
    MERN Stack
    Next.js
    Game UI/UX Design
    Web Application
    Web Development
  • $65 hourly
    • 5.0/5
    • (9 jobs)
    I am a full-stack software engineer with 10+ years of experience specializing in PHP, Laravel, WordPress, and JavaScript developments. I help clients translate their concepts into reality and building their applications from the ground up. For small or large projects, I start by fully understanding the needs and providing solid designs, then move onto implementations and finish with post-work maintenance to meet their requirements. I primarily work on custom-built web applications, frameworks, WordPress themes/plugins, Laravel projects, general-purpose websites, e-commerce, and JavaScript-based applications. I also help setting up back-end services, caching servers, micro-services, and more. My field of works includes: [PHP] - Laravel custom platforms/frameworks development - Full-cycle PHP application design - Module development - API design and implementation - Third party integration - SMTP/POP automated emails - SMS integration - Caching and optimization - Vanilla PHP development - Troubleshoot and bug fix [WordPress] - Creative design and development - Plugin/themes design and implementation - WooCommerce integration - Payment integration - Troubleshoot and bug fix - SEO and site optimization [Front-End Development] - Vue Development - Vanilla JavaScript development - Custom build front-end libraries - Css/Saas/Less - WebPack/Babel - JQuery, JQuery mobile - Framework integration (BootStrap, Bulma, Vuetify) - WebRTC realtime video communication - WebSocket applications [Back-End Development] - Corn/Turn Server setup - WebSocket server - Node.js/Express.js server - REST/SOAP API server - GraphQL server - Caching server architecture - Distributed systems architecture design - Micro-Services - Scheduled batch tasks - Scheduled mailing services - Apache setup/config/troubleshoot - Load-balancer setup/config/troubleshoot [Database] - Database model and design - Third party database integration - Data normalization and consolidation - Cassandra clusters - Redis clusters - GraphQL implementation - Consistent hashing Whatever the size or the complexity of the work, I'm capable of helping you with all your web project needs. The relevant field of works: - Custom-built PHP frameworks - API designs and development - Mobile Apps - HealthCare/Telemedicine platforms - E-Commerce - Enterprise Systems - Data mining, consolidation, analysis, integration - Web apps/Cloud systems - Artificial Intelligence - Data Modeling - Streamline workflows Fast turnover with quality assurance.
    Featured Skill JavaScript
    Vue.js
    CMS Development
    AWS Lambda
    jQuery
    Database Design
    Redis
    AWS CloudFront
    Apache Cassandra
    GraphQL
    PHP
    Laravel
    MySQL
    WordPress
    AWS CloudFormation
    WebRTC
    CloudApp
    Node.js
  • $50 hourly
    • 5.0/5
    • (11 jobs)
    🏆 Client Feedback Highlights: "He is an exceptional developer who demonstrated a high level of professionalism and responsiveness throughout the project. He not only delivered the work on time and with great attention to detail but also went above and beyond by suggesting valuable improvements to the website and to enhance user experience." About Me: Passionate about delivering custom, high-quality web solutions, I specialize in crafting seamless digital experiences that are both visually appealing and functionally flawless. With a strong focus on user-friendly design, cutting-edge technology, and robust back-end development, I ensure your project not only meets but exceeds expectations. Skills: 💻 Full-Stack Development 🚀 Front-end Technologies (React.js, Next.js, TypeScript) 🛠️ Back-end Technologies (Python, Node.js, Express.js) 📊 Database Management (MySQL, DynamoDB) 🔒 Security Implementation 🌐 RESTful APIs & Integrations 🎨 UI/UX Design Principles Experience: With a solid background in full-stack development, I've successfully delivered web and mobile applications tailored to diverse industries. From concept to deployment, I’m committed to making your project a success. Services: 🎨 Custom Web Development 🚀 Responsive Web Design 🔒 Security Enhancements 📊 Database Optimization 🌐 API Integration & Stripe Payment Solutions 🔄 CMS Website Creation & Website Conversion Why Choose Me: 🏆 Proven Expertise: Consistent success in delivering tailored solutions. 🚀 Innovation: Always exploring and implementing the latest technologies. 🤝 Collaboration: Clear communication and a strong commitment to client satisfaction. Let’s Collaborate: Ready to bring your vision to life? Let’s discuss your project and make it a reality!
    Featured Skill JavaScript
    LangChain
    Figma
    OpenAI API
    Zapier
    Flask
    DevOps
    Copywriting
    Website Builder
    CMS Development
    React
    Tailwind CSS
    Next.js
    Website
  • $70 hourly
    • 5.0/5
    • (2 jobs)
    10+ years working in technology, passionate about creating applications that meets people's visions. Will provide free consultations and minimum viable products.
    Featured Skill JavaScript
    LLM Prompt Engineering
    OpenAI Inc.
    Swift
    ChatGPT
    React
    Ruby
    CSS
    HTML
    Ruby on Rails
  • $75 hourly
    • 5.0/5
    • (2 jobs)
    I've built multiple apps with over 20k active users. Since 2017, I've built 20+ apps from scratch to release on both App Store & Play Store. if you * need to validate, start and launch your startup ideas * are expanding your existing business with apps * need help on your technical team * need to solve bugs or continue from other developers I'm your guy * I'm very experienced in native apps: From iOS apps in Storyboard & SwiftUI to Android Apps in Kotlin * I build backends primarily in node.js with mongodb. I primarily build on AWS but I also have experience with other cloud & vps providers like godaddy, hostinger, etc. * I do not compromise on quality Feel free to reach out! Depending on my availability, I will get on a confidential 30 minute free call with you if you need help figuring out your project in technical details :)
    Featured Skill JavaScript
    CSS 3
    HTML
    Web Hosting
    Swift
    MongoDB
    Node.js
    iOS
    Android
    Kotlin
    MySQL
    PHP
  • $40 hourly
    • 5.0/5
    • (6 jobs)
    I am a developer specializing in NodeJS and other web development technologies. I am also highly proficient in Python with anything from small miscellaneous tasks to larger projects. I also have ample experience with Retool and creating powerful internal tools. I have a passion for the internet and web technology, and am currently pursuing a degree in Network Programming and Network Administration.
    Featured Skill JavaScript
    Node.js
    Python
  • $70 hourly
    • 5.0/5
    • (8 jobs)
    Experienced and results-driven Software Engineer with over 10 years of expertise in web development, specializing in PHP and JavaScript. A dedicated team player with a keen eye for detail and a quick learner who thrives on tackling new challenges. Possesses the ability to excel in fast-paced environments and strong analytical skills. A resourceful professional adept at fostering positive relationships with both customers and colleagues. Proficient in the following technologies/frameworks: ✔PHP: Laravel/Livewire/Nova/Lumen/Blade, Drupal, CodeIgniter, CakePHP ✔JavaScript: TypeScript, Vue.js, Nuxt.js, Quasar, React.js, Next.js, Angular, Node, Express.js ✔HTML5/HTML, CSS/CSS3, SCSS, jQuery, BootStrap, Tailwind CSS ✔Databases: MySQL, PostgreSQL, MongoDB, and more ✔Cloud Services: AWS Lambda, Redis, S3, SES, SNS, SQS, EC2, ECS ✔API: REST API Development and Documentation with Swagger ✔Architecture: Microservice Architecture, Docker ✔Version Control: Github, Gitlab, Bitbucket ✔CI/CD and Testing: Circle CI, Travis CI, PHPUnit, Jest, Cypress ✔Project Management: Jira, Trello, Asana, Monday. Clickup Involved in the entire software development lifecycle, from conceptualization through development, testing, implementation, and maintenance. Passionate about the logic and structure of coding, committed to writing elegant and efficient code. Stays abreast of the latest trends in web development. Feel free to invite me to your project for a discussion on how I can be a valuable addition. Thank you for considering my profile.
    Featured Skill JavaScript
    React Native
    Firebase
    CodeIgniter
    WordPress
    Python
    NestJS
    ASP.NET
    Next.js
    Tailwind CSS
    Angular
    Vue.js
    Laravel
    React
    PHP
  • $80 hourly
    • 5.0/5
    • (2 jobs)
    I am a results-driven Software Engineer specializing in automation and AI integration, with a strong track record of designing and implementing intelligent systems that streamline workflows, reduce manual effort, and unlock business efficiency. With over 6 years of experience, I’ve built scalable backend services, automated pipelines, and integrated AI models across domains including healthcare, finance, and SaaS platforms. My expertise includes: • AI/ML Integration: Deploying and integrating models using TensorFlow, PyTorch, OpenAI, and AWS/GCP AI services into real-world applications. • Process Automation: Designing end-to-end automation using tools like Python, Node.js, Zapier, Power Automate, and custom APIs. • Intelligent Workflows: Building systems that combine rule-based automation with AI decision-making for smarter operations. • Cloud & DevOps: Deploying solutions on AWS, Azure, and Google Cloud with CI/CD pipelines, serverless functions, and containerized services. I’m passionate about building tools that not only solve problems but also enhance user experience through smart automation and seamless AI capabilities. I thrive in cross-functional teams and am always focused on delivering reliable, maintainable, and impactful software.
    Featured Skill JavaScript
    Zapier
    PyTorch
    TensorFlow
    Data Scraping
    Make.com
    Python
    Microsoft Power Automate
    ChatGPT
    OpenAI API
    Large Language Model
    n8n
    Machine Learning Model
    Machine Learning
    Artificial Intelligence
  • $130 hourly
    • 5.0/5
    • (20 jobs)
    Why should you work with me: - Elite Upwork Talent: Proud member of the "Top 1% Expert-Vetted Talent" program, signifying top-tier expertise. - Solidity Veteran: 8 years crafting and deploying production-ready Smart Contracts with a proven track record. Recent Portfolio highlights: - Developed and launched a major decentralized trading platform - Pear.garden (Arbitrum), which has already done $300 million in trading volume within 3 months of launch! - Launched a major NFT Marketplace - Realnifty.xyz. Also currently serving as the CTO - DeFi Expertise: Enhanced backend operations for Polygon's premier DEX, Quickswap.exchange. - Successfully launched several NFT collection + Metaverse projects (dream3.io, realnifty.xyz, KandiKids.io, cosmicuniverse.io, Discodogsnft.com, Sonat Clan, etc) - Planned, developed and launched several large platforms successfully (Zaptheory, Wellbility, Goldcanvas, etc) including Ethereum based NFT-Marketplaces / NFT-Collections. - Have served as the Chief Blockchain Officer at a major fast growing blockchain startup based in NYC - Winner of the Penn State Hackathon - Mentor at Startup Weekend Silicon Valley at Google My Role as your CTO: I excel in guiding teams lacking a robust internal tech division, seamlessly assuming the full scope of a CTO's responsibilities. With a broad background in Systems Architecture and Node.js applications, complemented by a foray into Android development and EHR solutions, my journey has been diverse. Blockchain Focus: Also, I've been working with Blockchain technologies for the past few years and have experience with launching Blockchain projects having secure and scalable Ethereum smart contracts at its core. Communication Commitment: I believe that communication is the most important and critical aspect of working remotely and this is one my core strengths. I am also accessible throughout the week at any time.
    Featured Skill JavaScript
    NFT Marketplace
    Blockchain Development Framework
    Blockchain, NFT & Cryptocurrency
    Smart Contract
    Blockchain
    Blockchain Development
    Blockchain Security
    Ethereum
    NFT Minting
    NFT
    Blockchain Architecture
    Web Development
    Node.js
    SQL
  • $63 hourly
    • 5.0/5
    • (6 jobs)
    I am a Fullstack developer. I have +10 years of experience in web development. Expert in backend API development and Javascript base front-end development. Export to develop large-scale Python Django applications. Django Rest Framework expertise. Export Automation and data scraping tools like selenium, scrapy. Experienced Data analyst. I get used to working on different types of projects in my career, I've worked for 5 years in a tech company in Silicon Valley which is creating solutions for the biggest GSM operator AT&T as a lead senior developer. I have 7 years of Python (Django) experience, I am familiar with Flask. I've worked on IOT devices (raspberries). I have a year of experience in mobile development with React-Native. I describe myself as Digital Nomad, I believe I have good social skills to communicate and I believe I am a solution-oriented person.
    Featured Skill JavaScript
    Front-End Development
    Data Scraping
    MySQL Programming
    RESTful API
    Elasticsearch
    API Development
    React
    Python
    MongoDB
    Docker
    Django
    jQuery
  • $70 hourly
    • 0.0/5
    • (0 jobs)
    I am software engineer with 5+ years of experience in FAANG companies I have worked with various products ranging from E-commerce application, Cloud computing services, embedded system and 3-D reality simulation software. I am also providing professional service in mentoring and coaching on solving variety of data structure and algorithm problems.
    Featured Skill JavaScript
    MongoDB
    Flask
    Django
    AJAX
    Cloud Computing
    Microservice
    React
    Java
    C#
    Python
    MySQL Programming
    Node.js
  • $35 hourly
    • 0.0/5
    • (0 jobs)
    Hello there! I am a backend engineer with over 3 years of experience building server-less applications and automating things. I am currently working for Facebook where I build and drive features to streamline the messaging experience. Prior to this, I have worked extensively in the financial sector building scalable services and REST apis using AWS lambda, ECS and API gateway. Would love to talk to you more on how my skill set can be an asset to your project. Ping me! Main languages: C++ Hack Python
    Featured Skill JavaScript
    Amazon S3
    AWS CloudFormation
    Java
    Python
    Amazon API Gateway
    Bash
    Angular
    C++
    Microsoft Azure
    AWS Lambda
  • $40 hourly
    • 0.0/5
    • (0 jobs)
    As an experienced Full Stack Developer and Cloud Solutions Architect, I bring over 6 years of expertise in developing and scaling robust, user-focused mobile and web applications. I have a proven track record of delivering end-to-end solutions—from conceptualization to deployment—across diverse industries. Whether it’s building cross-platform mobile apps, crafting scalable backend systems, or designing seamless cloud infrastructures, I take pride in creating impactful digital products that meet client goals. Key Skills and Expertise Mobile App Development: Extensive experience in building Android and iOS applications using Flutter, Swift, Java, and Xamarin Forms. Backend Development: Proficient in Java (Spring Boot, JPA), Node.js, PHP, and Shell Scripting, with expertise in creating scalable RESTful APIs and microservices architectures. Cloud Solutions: Hands-on experience deploying services on AWS, Google Cloud Platform (GCP), and Microsoft Azure, leveraging technologies like Docker, Kubernetes, and serverless functions for cost-effective, high-performing SaaS solutions. UI/UX Development: Skilled in crafting engaging, responsive interfaces using HTML5, CSS3, JavaScript, React, and Angular, ensuring user satisfaction and retention. SaaS Product Development: Adept at transforming ideas into fully functional SaaS tools, bringing products from 0 to 1 and scaling them for market success. Virtualization & Infrastructure: Experience with VMware Fusion and cloud orchestration tools to manage infrastructure efficiently. Career Highlights Cloud-Based Automation Tool: Spearheaded the development of a cloud-based testing automation platform, improving QA processes and boosting deployment speed for enterprise clients. Health Food Delivery App: Designed and launched a mobile application for health food delivery, reaching 100,000+ users and achieving a 20% increase in user retention. Community Engagement Platform: Built a scalable platform for empowering women, integrating API-driven solutions and cloud services, and achieving widespread adoption. SaaS Tools Development: Worked with multiple clients to design and develop SaaS products, successfully deploying services on cloud infrastructure while ensuring cost optimization and scalability. Why work with Me? End-to-End Expertise: I am skilled in managing all aspects of development—from backend systems and cloud deployment to user-facing applications—ensuring cohesive and reliable solutions. Client-Centric Approach: I collaborate closely with clients to understand their unique requirements, tailoring solutions that align with their vision and business objectives. Innovative Problem Solver: My passion for technology drives me to create innovative solutions for complex challenges, ensuring efficiency and long-term value. Reliable & Committed: I deliver projects on time and within budget, maintaining the highest standards of quality. Tools & Technologies Programming Languages: Java, Dart, PHP, Node.js, Shell Scripting Frameworks & Libraries: Spring Boot, JPA, React, Angular Mobile Development: Flutter, Swift, Xamarin Forms Cloud Platforms: AWS, GCP, Microsoft Azure Databases: MySQL, PostgreSQL, MongoDB Version Control & CI/CD: Git, Jenkins, Docker If you’re looking for a developer who combines technical expertise with a passion for creating high-impact solutions, let’s connect. I am excited to collaborate on projects that make a difference and deliver value to businesses and users alike.
    Featured Skill JavaScript
    Cloud Computing
    AWS Application
    Mobile QA
    Flutter
    Angular
    NodeJS Framework
    Java
    Java Persistence API
    WordPress Plugin
    WooCommerce
    PHP
    RESTful API
    CSS 3
    React
  • $75 hourly
    • 0.0/5
    • (0 jobs)
    I’m a top-rated professional web and app developer with over 15+ years of experience in MySQL, HTML5, CSS3, Bootstrap, JavaScript, jQuery, React, NodeJS, Angular, ASP .NET, .NET core, Shopify, WordPress and Magento. Apart from this I also have hands on experience with python and blockchain technology. work on payment and integration like Google calendar, Firebase notifications, third party APIs and CRM Development. Website development Experience: - • Expert in PHP, Laravel. • AngularJS, ReactJS, Node JS, ASP .NET, .NET core MongoDB • Expert in Web Services, JSON. • Create Attractive Graphics and Designs using Adobe Photoshop, Illustrator, Adobe XD. • Expert in modern web standards, Web 2.0, HTML5, CSS3, jQuery, AJAX. • I have a good hand in the development of E-Commerce and CMS like WordPress, OpenCart, Magento. • Expert in 3rd Party API Integration Like PayPal, Stripe, Facebook, Google, LinkedIn, etc. Services I Provide: -Web and App Development -Cloud Computing -UI/UX Designing -Digital Transformation -Blockchain Development -DevOps & IoT Why should you hire me? o Guaranty Delivery on time: - No delay in work, super-fast excellent knowledge. o Cost-effective service &on-time services without any delay o Good communication skills o I am 100% responsible for what I'm doing because my goal is to make a customer happy. I'm looking forward to furthering communications! Thank you very much for visiting my profile. Respectfully, Chetan Dave
    Featured Skill JavaScript
    React Native
    GitHub
    HTML
    Solidity
    ASP.NET
    Node.js
    Jira
    .NET Core
    React
    MariaDB
    PostgreSQL
    MySQL
    Python
    MongoDB
  • $30 hourly
    • 5.0/5
    • (3 jobs)
    Hi, I'm George, a full stack software engineer with 4+ years of professional experience based in the San Francisco Bay Area. Things I recently worked on: - Frontend web development at Virufy, a medtech AI non-profit. I developed the marketing web app from the ground up to support internationalization and deployment to Github Pages using Next.js. I also transformed Figma designs into responsive web pages using React, Typescript, and Tailwind CSS. I was formerly at: - Tigo Energy, a mid-size renewable energy company, modernizing the tech stack for their flagship software product, Energy Intelligence (EI), designing and implementing new classes and schemas for their auditing tool using PHP and SQL, and writing PHP scripts to migrate data from Postgres to Clickhouse, which has shown to improve query performance by up to 10x. - Northwestern Mutual, a massive financial services company, building internal web search tools with NestJS, React, Typescript, and Apollo GraphQL to fetch insurance policy data in real-time from various data sources (ie. AWS RDS, IBM Db2), and a PII data masking application in Golang. Although most of my experience has been backend and full-stack, frontend web development is becoming my newfound passion. I find collaborating with UI/UX designers and building professional and engaging user interfaces and experiences to be fun and rewarding.
    Featured Skill JavaScript
    NestJS
    PostgreSQL
    MySQL
    Tailwind CSS
    RESTful API
    HTML
    Next.js
    SQL
    GraphQL
    Node.js
    React
    TypeScript
  • $50 hourly
    • 1.3/5
    • (1 job)
    I have 5 years of experience as a software engineer and currently working at Oracle Cloud Infrastructure as a Senior Software Engineer. Currently building out Opensearch managed cloud service. Have experience with building out full stack application using react nodejs, javafx desktop application, and backend service using Java Spring.
    Featured Skill JavaScript
    Oracle
    TestNG
    Apache Kafka
    CSS 3
    React
    Java
    Spring Boot
    Oracle Database
    ExpressJS
    Node.js
    Hibernate
    HTML
    MySQL
    CSS
  • $50 hourly
    • 0.0/5
    • (0 jobs)
    I am a software engineering professional. I can help with the entire SDLC and all its stages. Expert level expertise with using OpenAI APIs for real world problem solving, automating manual web interaction by using selenium web-driver, Google Scripts for managing data in Gmail, Google sheets. Building analytics through automation using Google Scripts. I am responsive and believe in communicating efficiently.
    Featured Skill JavaScript
    Application Integration
    Software Architecture & Design
    Software Consultation
    SQL
    Database
    Medical Billing
    Selenium WebDriver
    Python
    Core Java
    OpenAI API
    Google Apps Script
    Web Application
    Mobile App
  • $70 hourly
    • 0.0/5
    • (0 jobs)
    Data scientist with extensive experience in software development and cloud computing. Proven track record in developing machine learning models, deploying scalable solutions, and leveraging cloud infrastructure to enhance data-driven decision-making. Skilled in Python, Typescript, and various data science frameworks.
    Featured Skill JavaScript
    Docker
    AWS Glue
    AWS Development
    AWS CloudFormation
    API Development
    Django
    Python
    Unsupervised Learning
    Time Series Analysis
    Data Extraction
    ETL
    Artificial Intelligence
    Machine Learning
    Data Analysis
  • $60 hourly
    • 0.0/5
    • (0 jobs)
    I'm a full-stack developer experienced in: - Web / Application development - AI-powered search engines / chatbots - AI integrations in general (mainly with Gemini and GPT-4) - Game development with Unity. Skills / Languages: - Mainly Python, JavaScript / HTML / CSS, and Java, but I'm also really comfortable with other languages such as C / C++ and C#. I am a tech-lead so I'm very comfortable with the entire project development journey from start to finish and have great communication skills!
    Featured Skill JavaScript
    Web Application
    Scripting
    C#
    Java
    Python
    Programming Bug Fix
    App Development
    Search Engine
    Chatbot Development
    Software Architecture & Design
    Game Development
    Scripts & Utilities
    Web Development
    Artificial Intelligence
  • $70 hourly
    • 0.0/5
    • (0 jobs)
    SUMMARY I am a Senior Software Engineer with over 8 years of experience building AI-driven applications, scalable backend systems, and cloud-based platforms. I enjoy working across the stack, from machine learning pipelines to cloud infrastructure. I had the chance to work on real-world problems in fintech, logistics, and SaaS, and I am comfortable collaborating with teams to turn ideas into reliable, production-ready solutions.
    Featured Skill JavaScript
    Android
    TensorFlow
    PyTorch
    C#
    Java
    C++
    Python
    App Development
    Android App Development
    Mobile Game
    Web Development
    Web Application
    Mobile App
    Artificial Intelligence
  • $46 hourly
    • 5.0/5
    • (1 job)
    Hi, I’m a web developer with a solid background in building and improving web applications. I work with HTML, CSS, JavaScript, Node.js, React, Next.js, Python, Docker, Cloudflare, Bubble.io, and more. I enjoy learning new tools and finding better ways to solve problems. I’ve worked as both a developer and a CTO, so I understand how to balance technical work with business needs. I’ve helped teams cut server costs, launch new products, and make apps run smoother and faster. I like working with others—whether that’s leading a team or being part of one. I believe good communication and teamwork are key to getting things done right. If you need help building something new or improving what you already have, let’s talk! I’m here to help you reach your goals.
    Featured Skill JavaScript
    Instagram
    Social Media Management
    Content Strategy
    Content Creation
    Social Media Marketing
    Email Marketing
    Node.js
    React
    Web Design
  • $30 hourly
    • 5.0/5
    • (20 jobs)
    With more than 10 years of experience in website design and development, I excel in creating tailored, high-quality websites while providing expert bug fixing and ongoing maintenance. I’m passionate about turning your vision into a seamless, functional digital experience, ensuring your site not only looks stunning but runs flawlessly with reliable support to keep it performing at its best. My expertise spans popular platforms like WordPress, Webflow Wix, Shopify, and Squarespace, allowing me to deliver versatile and user-friendly websites. I leverage a robust tech stack—including HTML, CSS, JavaScript, TypeScript, Laravel, Vue.js, and React.js—to build modern, scalable, and responsive designs that meet your goals. Whether you need a stunning website or a powerful custom CMS, I’m here to bring your vision to life with precision and creativity. Let’s collaborate to create something exceptional!
    Featured Skill JavaScript
    Twitter/X Bootstrap
    Website
    MySQL
    Laravel
    WordPress
    Web Design
    React
    HTML5
    Bootstrap
    PHP
    HTML
    Web Development
    CSS
  • $40 hourly
    • 5.0/5
    • (6 jobs)
    I have over 10 years experience building responsive websites and more from scratch. My skills include: Salesforce Apex, Salesforce Lightning Web Components, Xamarin, Flutter, PHP, PHP Frameworks, Java, Python, Golang, SQL, MySQL, NodeJS, MongoDB, React Native, JavaScript, JQuery, Angular, React, Knockout, Ember, HTML, CSS, XML, Shell Scripting, Xamarin, C# Environments: Linux, Windows , Git Graphic Design: Adobe Photoshop, Adobe Illustrator, Adobe InDesign, PSD to HTML, PSD to WordPress, WordPress, and Bootrstrap. I also offer maintenance and support services.
    Featured Skill JavaScript
    Bootstrap
    jQuery
    WordPress
    CSS
    Web Development
    PHP
    SQL
    HTML
    MySQL Programming
    React Native
    PSD to WordPress
    PSD to HTML
    Adobe Illustrator
    Adobe Photoshop
  • $30 hourly
    • 5.0/5
    • (1 job)
    7+ Years of teaching Front End Web Development at Codify Academy 7+ Years of freelance experience creating in depth user experiences for web applications and websites. I love pretty and functional things. Absorbing the newest and coolest trends to bring you the best product I can for a reasonable price. Skillset include: HTML5, CSS3, React.js, Javascript (ECMAS6), Adobe Creative Cloud(photoshop/illustrator/etc) , Google Apis, Responsive websites and applications, and mobile web apps. Learning lynxjs and react native in my freetime to develop mobile apps. When writing an inquiry please paint as specific of a picture as you can, so we can your product done as soon as possible! Hope to hear from you soon!
    Featured Skill JavaScript
    Framer
    WordPress
    Webflow
    Responsive Design
    Figma
    Web Content Development
    Bootstrap
    PSD to HTML
    Graphic Design
    HTML5
    CSS
    Web Development
    Web Design
  • $50 hourly
    • 5.0/5
    • (2 jobs)
    Thank you for visiting my profile. I am a highly skilled software engineer and computer science graduate with 7+ years of professional experience. Software development is my greatest skill and I have an incredible attention to detail and perseverance in getting the job done and done well. I've been developing iOS/Android apps for over 6 years (see my portfolio for screenshots and iTunes/Google Play store links). I work as an individual, supporting full time. I'm here to analyze your ideas and requirements and offer our vision of project realization. Rough quote will be ready within an hour. If it is acceptable for you, I'll prepare detailed project development plan indicating timeline and budget. ******************************** My Skills ****************************** -iOS Apps using Objective-C & Swift -Apple Watch Apps using Objective-C & Swift -Cocos-2D & Cocos-2DX -APNS (Apple Push Notifications Service) and In-App Purchase -XML Parsing, JSON Parsing, SOAP response and web services -SQLlite, Google Map Api1, Api2 -Facebook Api, Twitter API, Json , Rest Webservice Integration -QR Code, Background Service -GPS Service, Bluetooth Integration -Admob, Supersonic, AppsFlyer -Push Notification, FTP Server API -Photo Gallery, RSS Feed Reader -Widget Api, WallPaper Live Framework -IME Keyboard, Audio/Video Steam -Apple App Store submission -Source Control tools (BitBucket & GitHub) -Test Driven Development (TDD) ********************** My development experiences ********************** -Social Networking App -Dating App -Fitness App -Restaurant/Order App -Booking App -Geolocation App -Messaging App , Shopping App -Video & Voice Call -Facebook integration -Barcode and QRCode Scanning -UI/UX, GPS location based -High quality and Money Back Guarantee ***************************** Program Languages ************************* - Objective-C, Swift - Java, C, C++, C# - PHP, HTML5, JavaScript, CSS, MySQL My broad development experience makes me especially efficient and effective in developing mobile apps. I structure my work for best client value starting with clear project objectives. I am worthy, creative, innovative thinking and like to do my job. I hope to work for kind clients with long term relationship. Thanks for your time!
    Featured Skill JavaScript
    Swift
    Android App Development
    Mobile App Development
    jQuery
    HTML5
    Laravel
    PHP
  • $35 hourly
    • 0.0/5
    • (1 job)
    SKILLS -Programming Languages: Python, JavaScript, SQL, MySQL, HTML5, CSS3, XPath, JSON -Testing Frameworks/Tools: Selenium WebDriver, Postman, BrowserStack, Swagger, Chai -Testing Methodologies: Manual & Automation Testing, End-to-End Testing, Functional, Regression, UAT, Sanity Testing -API Testing: REST API, Postman, Swagger -Databases: MySQL, SQL -Version Control: Git, GitHub PROFESSIONAL EXPERIENCE Software Tester San Francisco, California Publicis Re:Sources Aug 2023 - Present - Increased test coverage by developing and executing comprehensive manual test cases for core platform features, ensuring high-quality releases - Contributed to a high success rate in production releases by actively participating in User Acceptance Testing (UAT) - Conducted comprehensive testing of Chrome extension across multiple advertising platforms (Google Ads, SA360, Pinterest, The Trade Desk, Prisma, TikTok, etc.), ensuring functionality and compatibility - Prepared reports on all aspects related to the software testing carried out and reported to the design team - Collaborated closely with developers to perform root cause analysis, improving issue resolution times and enhancing the overall software development lifecycle - Utilized Azure DevOps and Jira to streamline project management, tracking, and collaboration - Provided mentorship and training to QA interns on advertising platform functionalities and QA best practices - Communicated with clients to troubleshoot and resolve technical issues
    Featured Skill JavaScript
    JetBrains WebStorm
    API
    Postman
    SQL
    Python
    Selenium WebDriver
    MySQL
  • Want to browse more freelancers?
    Sign up

How hiring on Upwork works

1. Post a job

Tell us what you need. Provide as many details as possible, but don’t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates you’re excited about. Hire as soon as you’re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Trusted by

How do I hire a JavaScript Developer near San Jose, CA on Upwork?

You can hire a JavaScript Developer near San Jose, CA on Upwork in four simple steps:

  • Create a job post tailored to your JavaScript Developer project scope. We’ll walk you through the process step by step.
  • Browse top JavaScript Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top JavaScript Developer profiles and interview.
  • Hire the right JavaScript Developer for your project from Upwork, the world’s largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a JavaScript Developer?

Rates charged by JavaScript Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a JavaScript Developer near San Jose, CA on Upwork?

As the world’s work marketplace, we connect highly-skilled freelance JavaScript Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream JavaScript Developer team you need to succeed.

Can I hire a JavaScript Developer near San Jose, CA within 24 hours on Upwork?

Depending on availability and the quality of your job post, it’s entirely possible to sign up for Upwork and receive JavaScript Developer proposals within 24 hours of posting a job description.

Looking to hire for long-term or full-time assignments? See how Full-time hiring on Upwork simplifies the process.