Upwork home
Sign up
Secondary

Hire the best JavaScript Developers in San Salvador, SV

Check out JavaScript Developers in San Salvador, SV with the skills you need for your next job.
Hire freelancers
  • $40 hourly

    • 4.8/5
    • (34 jobs)
    Hi there! I'm a skilled software engineer with expertise in full stack development and mobile development. I take pride in my ability to create top-notch digital experiences that are both innovative and user-friendly. My self-taught approach and commitment to following best practices have helped me become a master in my field. I am highly proficient in both front-end and back-end development, making me a valuable asset for any project that requires a full-stack developer. I am continuously learning and staying up-to-date with the latest technologies and trends to ensure I am providing the best possible results for my clients. Let's work together to bring your ideas to life!
    Featured Skill JavaScript
    ExpressJS
    MongoDB
    React
    HTML
    Vue.js
    Laravel
    Angular
    MySQL
    Vuex
    React Native
    Tailwind CSS
    CSS
    PHP
    web3.js
  • $50 hourly

    • 0.0/5
    • (1 job)
    Hello, I work as a web developer specializing in: +Wordpress - PHP +Python, Django, Mezzanine (a CMS based on Django) +HTML5 +CSS +JavaScript +Web Hosting Platforms, +CSS / SASS +WebPack +JQuery +Strategic planning +Analytical Skills +QA Abilities +Test A/B +Responsive UX +MySQL +Time management skills I also love efficiency and following best practices. I work with WCAG 2.1 AAA, SEO Optimaze, Best Practices and Performance Optimaze. Let me know when we can set up a time for a live interview and answer any doubts you may have. Cheers, Mauricio Paz
    Featured Skill JavaScript
    Ecommerce
    WooCommerce
    Webflow
    Web Accessibility
    PHP
    Python
    Website
    CMS Development
    Web Design
    SEO Audit
    Web Content Accessibility Guidelines
    Search Engine Optimization
    WordPress
  • $15 hourly

    • 4.6/5
    • (6 jobs)
    With 4+ years in software engineering, I specialize in full-stack development, creating scalable and efficient web-based applications. I've contributed to successful projects, including an HR management system, optimizing internal processes. Proficient in JavaScript, HTML/CSS, Vue.js, Node.js, and Express.js and WordPress, I stay updated on industry trends and enjoy solving complex problems with the latest technologies.
    Featured Skill JavaScript
    English
    HTML
    SQL
    PostgreSQL
    Node.js
    MySQL
    Vuetify
    C#
    ExpressJS
    WordPress
    Vue.js
    CSS
    PHP
  • $19 hourly

    • 5.0/5
    • (3 jobs)
    I have worked as a web developer for a local company, I was also in charge of the database management as well as server administration, I think that besides a good web app it is good to have a clean code, working tidily lets others to know what you did with your code. I love developing web apps as well as design websites, I like to work hard until finish with a good result. Here are some things I have knowledge on: - PHP - Laravel - CodeIgniter - Bootstrap - CSS3 - HTML 5 - jQuery - AJAX - Javascript - MySQL - SQL - PostgreSQL - JSP
    Featured Skill JavaScript
    PSD to HTML
    jQuery
    MySQL
    CSS 3
    HTML5
    Java
    SQL
    PHP
    CodeIgniter
  • $17 hourly

    • 4.9/5
    • (7 jobs)
    Determinated and ongoing Full Stack Developer with five years of extensive experience developing software. Problem-solving and good decision making, Good attention to detail, and not afraid to take risks. Responsible for work schedules, efficient time management skills, and excellent performance at remote jobs.
    Featured Skill JavaScript
    RESTful API
    React
    Adobe Photoshop
    WordPress Plugin
    SCSS
    HTML
    PHP
    WordPress
    CSS
    WooCommerce
  • $20 hourly

    • 5.0/5
    • (1 job)
    Experience in developing and maintaining high quality applications. Extensive knowledge of various programming languages and frameworks, as well as agile methodologies. Proven ability to translate customer requirements into effective and scalable technical solutions. I am looking to be part of a dynamic team in which I can share my knowledge and skills to generate value propositions for the client.
    Featured Skill JavaScript
    PHP
    Laravel
    Spring Boot
    Java
    User Experience Design
    jQuery
    CSS 3
    HTML5
    Responsive Design
  • $18 hourly

    • 4.3/5
    • (1 job)
    Hello everyone, my name is Kevin Portillo, and I'm an enthusiastic Odoo developer with a solid background in this dynamic field. Throughout my journey, I have delved deep into various aspects of Odoo, mastering both fundamental and advanced skills that are crucial in the realm of ERP solutions. My expertise lies in customizing Odoo to fit unique business needs, ensuring that each solution is tailored precisely to the client's requirements. My key skills include: Basic Skills: Python programming, PostgreSQL database management, understanding of Odoo's ORM framework, and basic module development. Advanced Skills: Complex module customization, integration with third-party services, performance optimization, and deploying Odoo in various environments. I am passionate about leveraging these skills to create effective and efficient business solutions, and I'm excited to share some of the unique projects I've worked on. Let's dive into the world of Odoo and explore its potential together.
    Featured Skill JavaScript
    Django
    Python
    Microsoft SQL Server
    C#
    CSS
    HTML
  • $17 hourly

    • 0.0/5
    • (0 jobs)
    Results-driven full-stack web developer with 5+ years of experience delivering high-performance web and mobile applications. Specializing in React, React Native, and Next.js for exceptional front-end experiences, I also possess strong back-end skills in Express, Node.js, GraphQL, and database management. I build scalable APIs, optimize performance, and ensure seamless data integration. My WordPress expertise further enhances my ability to provide comprehensive web solutions. I am dedicated to clean code, efficient workflows, and exceeding client expectations.
    Featured Skill JavaScript
    WordPress
    GitLab
    GitHub
    Git
    CSS 3
    SCSS
    Vuex
    Vue.js
    Redux
    TypeScript
    Next.js
    React
  • $25 hourly

    • 0.0/5
    • (1 job)
    Throughout my experience as a software developer, I have focused on developing high-quality scalable code with the aim to fulfill client's requirements. I enjoy working collaboratively and have experience working with international teams and clients. I am not afraid of new challenges, I see them as opportunities for improvement
    Featured Skill JavaScript
    Mobile App Development
    Flutter
    Mobile App Development Consultation
    Web Development
    Angular
    TypeScript
    React Bootstrap
    CSS 3
    React
    HTML5
    Front-End Development
  • $12 hourly

    • 5.0/5
    • (2 jobs)
    A s a frontend developer with a software engineering degree who graduated last year, but with 3 years of experiences as a freelance and with companies, I am highly skilled in creating user interfaces using various web development technologies. My top skills include proficiency in HTML, CSS. JavaScript as well in web development frameworks as React.js ,Next.js. I have strong technical background in software engineering principles and practices, which enables me to write clean, efficient, and maintainable code. My strength lies in my ability to turn design concepts into functional and responsive web applications.
    Featured Skill JavaScript
    Jest
    Figma
    Web Testing
    Software
    NestJS Development
    React
    React Bootstrap
    CSS
    Next.js
    HTML
    Tailwind CSS
    Web Application
    Front-End Development
    TypeScript
  • $8 hourly

    • 0.0/5
    • (0 jobs)
    Hey there! I am a React Front End Developer with 2 years of experience and I am currently pursuing my last year in Software Engineering. I am passionate about creating intuitive interfaces with a great user interface and user experience, always following the best coding practices. - I'm experienced in building responsive and user friendly websites from the design to its development using the ReactJS library and TailwindCSS.
    Featured Skill JavaScript
    Next.js
    Scrum
    CSS
    Responsive Design
    Web UI
    UX & UI
    Tailwind CSS
    Jest
    React
    HTML
    TypeScript
    Git
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    Hello! I am a Data Engineer with a 5-year track record in the tech industry. My experience spans various domains, allowing me to provide comprehensive and creative solutions to diverse challenges. > FRONT-END development, I am skilled in using JavaScript and React to craft interactive and appealing user interfaces. My focus on user experience and visual aesthetics enables me to translate ideas from concept to reality with an innovative touch. > BACK-END development, my expertise centers around Python and Django. I build robust and efficient APIs while managing databases to ensure optimal performance and effective scalability. My passion for programming and system architecture drives me to create robust solutions that complement front-end functionalities. > Cloud Computing, I hold Microsoft Azure certifications and possess advanced knowledge of Active Directory and the Azure environment.
    Featured Skill JavaScript
    Software Development
    Cloud Computing
    React Native
    Python Script
    Azure DevOps
    React
    Python
    Django
    Responsive Design
  • $20 hourly

    • 0.0/5
    • (1 job)
    👋 Hey there! I'm Daniel, a web developer passionate about crafting digital experiences that make a difference. Here's what I bring to the table: No-Code Development: Skilled at using Bubble.io to create sleek web applications and solutions without the need for traditional coding. Team Player: I love working with others to understand client needs and ensure projects are on track for success. Problem Solver: Whether it's tackling complex business logic or troubleshooting issues, I'm always up for a challenge. Constant Learner: I stay updated on the latest trends to deliver the best solutions for my clients. Clear Communicator: From updates on project progress to discussing ideas with stakeholders, I keep everyone in the loop. Innovator: I'm dedicated to helping organizations grow by implementing fresh ideas and best practices in web development. Ready to bring your project to life? Let's chat!
    Featured Skill JavaScript
    OpenAPI
    React
    Database Integration
    API
    Python
    Bubble.io
  • $17 hourly

    • 0.0/5
    • (0 jobs)
    Hello! I'm a Computer Science Engineer with a strong background in software development, web design, and problem-solving. With a degree from Universidad Francisco Gavidia, I have honed my skills in creating efficient, scalable solutions for a wide range of projects. My expertise includes: Web Development: Proficient in WordPress, Elementor, WooCommerce, and custom coding for dynamic, responsive websites. Programming: Experience in JavaScript, and PHP for building both frontend and backend solutions. E-commerce: Skilled in setting up online stores with WooCommerce, optimizing product pages, and enhancing user experiences. Data Management: Knowledge of databases, SQL, and data analysis to ensure seamless data integration and reporting. I am passionate about delivering high-quality work and always strive to exceed client expectations. Let's collaborate to bring your ideas to life and make your projects successful!
    Featured Skill JavaScript
    Bootstrap
    React
    MySQL Programming
    CSS 3
    MySQL
    HTML
    Custom PHP
    PHP Script
    CSS
    PHP
    WordPress Theme
    Ahrefs
    WordPress
    WordPress Plugin
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    ¡Hola! Soy Licenciado en Ciencias de la Computación con más de 6 años de experiencia en desarrollo de software, especializado en soluciones backend. A lo largo de mi carrera, he trabajado con una amplia variedad de tecnologías y lenguajes, incluyendo Python, Java, Node.js, y bases de datos relacionales y no relacionales como MySQL, PostgreSQL y MongoDB. Mi enfoque está en diseñar y desarrollar arquitecturas backend eficientes, escalables y seguras. Estoy acostumbrado a trabajar con APIs RESTful, integración de microservicios, y optimización de rendimiento para garantizar que las aplicaciones sean rápidas y confiables. Además, tengo experiencia trabajando con metodologías ágiles, lo que me permite adaptarme rápidamente a los requerimientos de cada proyecto y colaborar de forma efectiva con equipos multidisciplinarios. Mi objetivo es ofrecer soluciones backend que no solo cumplan con los requisitos técnicos, sino que también mejoren la experiencia del usuario y contribuyan al crecimiento del negocio. Estoy listo para aportar mi experiencia y habilidades en tu próximo proyecto. ¡Espero poder trabajar contigo!
    Featured Skill JavaScript
    NodeJS Framework
    SQL
    Oracle PLSQL
    Oracle
    MongoDB
    Spring Security
    Spring Data
    Spring Boot
    Java
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    I'm a Backend Developer with a passion for building efficient and scalable systems. I have experience working with various backend frameworks and databases, focusing on designing reliable architectures and optimizing performance. I've worked as a freelance developer, helping clients build and improve their web applications by creating custom backend solutions, streamlining workflows, and enhancing system efficiency. I love tackling complex problems, learning new technologies, and continuously improving my skills to build better software every day.
    Featured Skill JavaScript
    Scrum
    Continuous Integration
    Requirement Analysis
    Node.js
    Golang
    Unit Testing
    Back-End Development
    Back-End Development Framework
    Ecommerce Website
    Web Development
    Web Application
    Product Development
  • $7 hourly

    • 0.0/5
    • (0 jobs)
    Web Developer | Expert in Front-End & Back-End Development As a highly skilled web developer, I specialize in creating dynamic, user-friendly websites and applications. My expertise spans across: 🌐 HTML, CSS, PHP ⚡ JavaScript Frameworks: React, Angular, Node.js, Next.js, Vue.js 💾 Database Management 📦 CMS Development: WordPress, Shopify, PrestaShop I lead a talented team of developers ready to collaborate and bring your web projects to life. We pride ourselves on delivering high-quality work at competitive prices and on schedule. Plus, I offer free post-launch support and seamless web deployment. Services I offer: 📄 Landing Pages 🛒 E-commerce Stores ✍️ Blogs 🌍 Web Pages & Web Apps Security & Protection: We prioritize your website's security, implementing: 🔒 Anti-spam measures 🚫 DDoS protection 🛡️ Database vulnerability management 🧰 Secure deployment strategies against malicious code injections Let’s bring your ideas to the web with precision and professionalism! 🚀
    Featured Skill JavaScript
    Landing Page
    Web Application Development
    PHP Script
    SQL
    CSS
    HTML
    Continuous Deployment
    CMS Development
    Ecommerce Website
    Scripting
    Script
    Ecommerce
    Web Application
    Web Development
  • $12 hourly

    • 0.0/5
    • (0 jobs)
    I am a Frontend Engineer specialized in creating enterprise web applications with clean and scalable architectures using Angular. I can also create small and medium websites for your company if you want to showcase your brand and show it to the world (landing pages, portfolios, …) - Skilled in Frontend technologies, mainly in Angular. - Experienced in working with agile methodologies. - Excellent soft skills.
    Featured Skill JavaScript
    Git
    Sass
    Website
    TypeScript
    Scrum
    Redux
    React
    Angular
    CSS 3
    HTML5
    Portfolio Website
    Landing Page
    Web Development
    Web Application
  • $15 hourly

    • 5.0/5
    • (2 jobs)
    Hello, I am a professional web developer with more than 6 years of experience in creating websites. I am a very proactive and enthusiastic person who likes challenges and grows in this technological world. These are just some of the technologies where I'm skilled: React.js, Angular, TypeScript, Ionic, HTML5, CSS3, JavaScript, PHP, WordPress, Laravel Framework, CodeIgniter Framework, MySQL, PostgreSQL, SQL Server, Git, Bitbucket, Sass, Stylus, Ajax, JQuery, Jquery Mobile, Bootstrap, Foundation, Semantic UI, etc. In my years as a developer I have worked on projects such as the following: - Informative websites - Custom web systems including inventory and billing modules - Creation of custom themes from scratch for WordPress - Blog sites using WordPress - Online sales platforms with WordPress and the implementation of Woocommerce - Corporate sites for lawyers and banks using WordPress - Sites for educational entities using WordPress - And recently progressive web applications using technologies like React and Angular, hybrid applications for ios and android using Ionic.
    Featured Skill JavaScript
    Ionic Framework
    Laravel
    React
    CodeIgniter
    Angular 6
    HTML
    CSS
    Website
    CSS 3
    HTML5
    WordPress
    PHP
  • $20 hourly

    • 0.0/5
    • (2 jobs)
    🚀 Shopify Developer | 5+ Years Experience | Full-Stack & Web Design Enthusiast Hello, Upwork community! With over 5 years of expertise as a Shopify Developer, I've been at the forefront of crafting impactful e-commerce solutions that resonate with users and drive conversions. My journey in the digital realm doesn't stop there; I've also honed my skills with platforms like WordPress, Squarespace, and Webflow, ensuring that I can cater to a diverse range of web needs. 🎨 From Design to Deployment: I pride myself on transforming intricate designs from Figma and PSD into fully functional, responsive websites. It's not just about coding; it's about bringing a vision to life. 🔍 Technologies & Platforms I've been working with: Frontend: React.js, CSS, HTML, JavaScript Backend: PHP, Laravel API REST Data Bases: MySql, MSSQL, PostgreSQL CMS Platforms: WordPress, Squarespace, Webflow DevOps: Docker Version Control: Git, GitHub, GitLab Whether you're looking to discuss the nuances of e-commerce, and the future of web platforms, or want to chat about the latest web design and development, I'm here and eager to connect. Let's create something amazing together! 🚀
    Featured Skill JavaScript
    Shopify
    Website Customization
    Shopify Theme
    Shopify Templates
    CSS
    Bootstrap
    Web Development
    Landing Page
    React
    WordPress
    CSS 3
    jQuery
    HTML
    Responsive Design
  • $20 hourly

    • 0.0/5
    • (0 jobs)
    Experienced C# and .NET Developer with a strong background in cloud technologies, specializing in Azure and DevOps practices. I have a proven track record of developing and deploying scalable applications, utilizing modern development practices and tools. With hands-on experience in Continuous Deployment (CD) through Azure Cloud Apps, I focus on delivering efficient, reliable, and innovative solutions. My journey in technology began in technical support for Google Cloud products, where I honed my problem-solving skills and developed a passion for coding. Over the years, I transitioned into software development, gaining expertise in Zoho Deluge, APIs, and most recently, .NET, C# and Azure. Today, I’m eager to apply my skills to challenging projects and continue growing as a developer. Open to new opportunities where I can contribute to impactful projects and work alongside talented teams to push the boundaries of cloud-based solutions.
    Featured Skill JavaScript
    API
    Project Management
    SQL
    Google
    Report
    Data Entry
    Translation
    Critical Thinking Skills
    PHP
    HTML
    Email Support
  • $15 hourly

    • 0.0/5
    • (1 job)
    Current semi senior fullstack software developer encouraged to learn new technologies. Some of my soft skills are to adapt to new environments easily, good teamwork, initiative. I like to have challenges that requires more than technical skills and I also like the idea of learning/gain experience from that challenge. Based on my career I have experience on learning new stacks of technologies and develop projects to understand better the ideas. I have worked with many programming languages including Python, PHP, Java, Golang, Kotlin, JavaScript, C# and so on.
    Featured Skill JavaScript
    Node.js
    TypeScript
    Java
    Golang
  • $10 hourly

    • 0.0/5
    • (2 jobs)
    I am an enthusiastic, responsible and independent Person. I have over 8 years experience on Data analyst jobs for private companies. I am honest, reliable, fast and accurate, delivering top-quality data. I believe that quality and customer satisfaction is of most importance. So my one & only goal is to achieve the satisfaction of my clients. I want to have a good and long-term working relationship with my clients. I'm proficient in Microsoft Office and Google Suite, I’ve developed expertise in statistical modeling, analysis and data presentations to stakeholders.
    Featured Skill JavaScript
    Project Management
    Customer Analysis
    Customer Service
    Data Entry
    Automation
    Google Apps Script
    Spreadsheet Automation
    Microsoft Office
    Office & Work Space
    Excel Formula
    Analytics
    Looker Studio
    Microsoft Excel
    Data Analysis
  • $5 hourly

    • 0.0/5
    • (0 jobs)
    ✅ 8+ Years of Experience – With nearly a decade of experience designing Wix websites, I know how to create stunning, functional, and high-converting sites tailored to your needs. 💰 Affordable & Transparent Pricing – I believe that every business, no matter the size, deserves a professional online presence without breaking the bank. My pricing is fair, upfront, and budget-friendly. 🎨 Custom, Eye-Catching Designs – Your website should reflect your brand. I craft unique, visually appealing, and user-friendly designs that help your business stand out. ⚡ Fast Turnaround – Need a website quickly? I deliver high-quality Wix websites efficiently, so you can start attracting customers sooner. 📈 SEO & Mobile Optimization – Every site I design is mobile-friendly and optimized for search engines to help you rank better and reach more customers. 🛠 Ongoing Support & Updates – I don’t just build websites; I help maintain and update them as your business grows.
    Featured Skill JavaScript
    Adobe Photoshop
    Microsoft Excel
    Google Sheets
    CSS
    HTML
    Web Development
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    REFEREN CIAS MI PERFIL Formar parte de una empresa en la que pueda poner en práctica todos mis conocimientos, que me brinde la oportunidad de alcanzar todas mis metas trazadas, y que me ofrezca la oportunidad de crecer en el área laboral, personal e intelectual.
    Featured Skill JavaScript
    Figma
    Tailwind CSS
    React
    IT Management
    IT Infrastructure
    Data Analysis
    Back-End Development
    Front-End Development
    C#
    Java
    SQL
    Web Development
    Software Development
    Desktop Application
  • $20 hourly

    • 0.0/5
    • (0 jobs)
    SUMMARY Dedicated and highly motivated programmer with 3 years of experience in the software development field. Recently graduated from New Jersey Institute of Technology with a Bachelor's degree in Information Technology. Throughout my years at university, I have gained skills and knowledge in various programming languages such as Python, C/C++, and SQL. I am adept at web design and software development, with strong problem-solving abilities and a passion for staying updated with the latest technologies. ACADEMIC PROJECT * Nut Sales Website * Created a website for a nut stand to sell, display and ship various products * Utilized programming languages like PHP, JavaScript, HTML, SQL and CSS to develop the website * User interface for virtual reality app * Developed and designed a menu for users to navigate a virtual reality app using Unity engine * Implemented functionality using C# language * Sports Betting Website
    Featured Skill JavaScript
    CSS
    RabbitMQ
    HTML
    Python
    Web Application
    Scripting
  • 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 Salvador, on Upwork?

You can hire a JavaScript Developer near San Salvador, 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 Salvador, 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 Salvador, 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.