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Hire the best JavaScript Developers in Katowice, PL

Check out JavaScript Developers in Katowice, PL with the skills you need for your next job.
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Rating is 4.8 out of 5.
4.8/5
based on 608 client reviews
  • $45 hourly

    • 5.0/5
    • (74 jobs)
    For a few years, I have been successfully involved in web sites development and management based on WordPress and WooCommerce with modern front-end solutions. My skills: - PHP (OOP) - Vanilla JavaScript - WordPress/WooCommerce themes and plugins development - Composer - Sass - Git - Gulp, Webpack - Google Ads, Google Tag Manager - Hubspot API - Segment.io - Performance, Core Web Vitals Expert
    Featured Skill JavaScript
    Sass
    Git
    Page Speed Optimization
    HTML5
    WordPress
    PSD to HTML
    Twitter/X Bootstrap
    Landing Page
  • $40 hourly

    • 4.6/5
    • (22 jobs)
    I have been a professional Senior Full Stack Developer since 2013. During that time, I have coded complex software systems, ranging from booking platform, news aggregator, reporting system, marketplace and keep up to date on the latest practices in coding in Webflow, JavaScript, React.js, HTML, CSS, Bootstrap, Node.js, Nest.js, WordPress, and WooCommerce. I am a part of the Polcode team, a Polish software development company established in 2006 with over 150 developers, designers, project managers, DevOps and QA specialists onboard. This means that besides my programming skills you always have access to a full-stack product design & development team. My technical expertise: - Code quality: Design Patterns, Test Driven Development (Rspec) - Version control system: GIT - Issue trackers: Redmine, Trello, JIRA, Asana My technology stack: - Backend: Webflow, Node.js, Nest.js, PHP 5/7, MySql, WordPress, WooCommerce, MVC - Frontend: Webflow,React.js, Twitter Bootstrap, CSS, HTML, SASS, LESS, JavaScript, React.js, Gatsby.js AJAX - Database Designs and programming: MySQL, PostrgreSQL, GraphQL, MongoDB My approach: - reliability and solidity, - efficiency and speed in problem-solving, - communication and optimal organization of work, - creativity and good advice More about Polcode Polcode provides customized software solutions for startups, SaaS companies, eCommerce stores, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open source technologies and platforms to bring innovation in an agile fashion. Our team excels in PHP, Symfony, Laravel, Magento, Go, React Native, React.js, Vue.js, Ruby on Rails and Angular. With over 150 people, Polcode has either empowered client teams or delivered end-to-end development projects for brands from fintech, manufacturing, consulting, eCommerce, marketing or eLearning industries and is recognized as Top Developer in Poland by Clutch. Looking forward to our cooperation! Konrad, Polcode Dev Team
    Featured Skill JavaScript
    WordPress Plugin
    PHP
    CSS
    Responsive Design
    React
    HTML
    jQuery
    WooCommerce
    WordPress
  • $15 hourly

    • 5.0/5
    • (3 jobs)
    👋 Hi there! I'm David, a web developer and web designer based in Katowice, Poland. As a Webflow specialist and Figma expert, I'm passionate about creating user-friendly, modern, and responsive websites that capture your brand's unique essence. 💻 With years of experience working with HTML, CSS, and JavaScript, I also have a solid foundation in Node.js and React.js. I'm well-versed in using APIs and libraries like GSAP and anim.js to create stunning animations that enhance your site's aesthetics and functionality. 👨‍💻 What can I help you with? I can create all types of websites, from landing pages to e-commerce sites. Whether you need a custom website design or development, want to revamp your existing site, or need ongoing website maintenance, I'm here to help. I specialize in creating tailor-made solutions that align with your business goals and deliver results. ✅ When you work with me, you can rest assured that I guarantee: 🔹 Clear communication and timely updates throughout the project 🔹 Attention to detail and high-quality deliverables 🔹 A commitment to delivering your project on time and within budget 🔑 Keywords that describe my skills and expertise include: Web development, Web design, Webflow, Figma, HTML, CSS, JavaScript, Node.js, React.js, APIs, Animations, Responsive design, User experience, Landing pages, E-commerce, WordPress, Shopify, WooCommerce, Magento, PHP, MySQL. Let's work together to bring your vision to life! 🚀
    Featured Skill JavaScript
    3Design
    Web Application
    Blender
    3D Art
    Front-End Development
    Web Design
    HTML
    Adobe Photoshop
    CSS
    Webflow
    Web Development
    Figma
  • $60 hourly

    • 4.0/5
    • (2 jobs)
    With 14 years of extensive professional experience in both frontend and backend development, I have established myself as a versatile and highly skilled tech lead. My journey in the tech industry encompasses significant contributions to various high-profile projects and organizations, showcasing my expertise in software development, system integration, and innovative solutions. I am proficient in JavaScript and TypeScript, with a particular affinity for the functional approach in React. On the backend, I have extensive experience in Node.js, Express, and various other backend frameworks. My skills in DevOps include tools and technologies like Docker, automated development pipelines, and server administration with Nginx and Apache. I have demonstrated leadership as a tech lead at Roche, managing teams and driving projects to successful completion. My full-stack development capabilities ensure seamless integration and functionality across platforms. At The Video Community (2012-2013), I joined the project amid critical issues, including a non-functional live video screening feature. I successfully resolved all issues, notably improving the live video screening functionality, and was commended by the CEO for solving key problems and completing crucial tasks where previous programmers had failed. At XTRF, I was tasked with enhancing the providers' portal of a large translation management system. I integrated new features while maintaining system stability, significantly improving user experience, and contributed to the company’s growth, leading to a successful acquisition by XTM. During my 8 years at Genentech (SF), Research and Early Development, I managed a complex ecosystem of over 20 legacy applications essential for protein production. I introduced innovative solutions like comprehensive tracking policies, Docker tools, contract testing protocols, and automated development pipelines. I maintained and developed the legacy applications, reduced bugs and downtime to marginal values, and significantly enhanced system reliability. As a tech lead at Roche, I was the second member of the newly created Developer Experience (DX) team. I was responsible for preparing code standards and developing tools for bootstrapping new projects, which significantly reduced the time and cost of creating new projects by allowing other teams to avoid wasting time on technical setup and instead immediately begin implementing their business features. I hold a degree in Computer Science from the Faculty of Fundamental Problems of Technology at Wroclaw University of Technology and studied Theoretical Mathematics at the University of Silesia. My technical skills include frontend frameworks such as React, AngularJS, and CanJS; backend frameworks like Node.js and Express; server administration with Nginx and Apache; and tools like Git, AWS, Docker, Composer, Grunt, and WebStorm. My testing expertise includes Mocha, Chai, and Jasmine. Additionally, I am proficient in MySQL, CSS3, HTML5, REST, and SOAP. I am always eager to embrace new challenges and continuously expand my skill set. My determination and ability to quickly adapt to new technologies have been key to my success in various projects and roles.
    Featured Skill JavaScript
    TensorFlow
    Machine Learning
    Git
    DevOps
    React
    Java
    Python
    TypeScript
  • $15 hourly

    • 5.0/5
    • (1 job)
    Hello! I am a developer passionate about creating modern, stylish, and functional websites. My goal is not just to complete your task but to exceed your expectations. Developing websites from scratch using modern technologies. Responsive design for all devices. Speed optimization for faster loading. Integration with APIs and third-party services. Precise design implementation (Pixel Perfect). Websites that not only look amazing but also achieve business goals. Let’s bring your dream project to life together! ✉️ Contact me now, and we’ll create something incredible.
    Featured Skill JavaScript
    AI Agent Development
    Machine Learning
    AI Builder
    Redux
    Router
    GitHub
    Git
    Node.js
    JSON
    REST API
    React
    CSS 3
    HTML
    Web Development
  • $65 hourly

    • 0.0/5
    • (0 jobs)
    Knows - UI: HTML and CSS3, Angular, jQuery, React -API: .NET Core, SQL Database, NoSQL Database, CI/ CD tools. Expirience in project management from start to finish Regular communication is important to me, so let’s keep in touch.
    Featured Skill JavaScript
    CRM Software
    CSS 3
    Oracle Database
    MongoDB
    Dependency Injection Framework
    SQL
    Entity Framework
    RxJS
    Angular Material
    Angular
    ASP.NET Web API
    Web API
    .NET Framework
    .NET Core
  • $35 hourly

    • 0.0/5
    • (0 jobs)
    Hi I can elevate your businesse's web presence and build your website application from scratch or fix your existing one. I have 7+ years of experience Web app development. Languages ✔️Javascript, ✔️Python Frontend ✔️ React.js ✔️ Next.js ✔️Redux ✔️Typescript ✔️TailwindCSS Backend ✔️ Node.js ✔️ ExpressJS ✔️ NestJS Database ✔️ MongoDB ✔️ MariaDB ✔️ PostgreSQL Let's get connected and build successful projects together :)
    Featured Skill JavaScript
    TypeScript
    Node.js
    Next.js
    React
  • $50 hourly

    • 5.0/5
    • (3 jobs)
    I am a Delivery Team Lead at Polcode. I am responsible for providing companies around the world with top-quality software development services. If Business Management is your core competency and you want to rely on a solid partner who will become your teammate in taking care of software design and heavy programming I am offering you our knowledge, hands-on experience and reliability. For the last 11 years, our team of 150 developers has been helping companies to deliver their core software development projects on time and within budget. Based on what we have achieved till now I believe there is much more than we can offer you than fair price and project security. We guarantee stress relief so you can focus on the business side of your engagement. Would you be ready to start a trial project with us to see how it is to go through all development stages and receive final product stress-free and under full control? Facts about Polcode: - Top 5 European software house on Upwork; - 100+ Top Rated engineers ready for your challenge; - over 800 clients all over the world; - 11 years of experience on the market; - 1m+ hours worked in projects; - over 4.000 projects delivered; - 5 stars reviews; - 98% customer satisfaction. Our developers speak excellent English and are available to you within GMT+1 offering flexible working hours. We also deliver continuous support and maintenance of your web applications. Projects can be managed using SCRUM methodology. If you want to ask a question please send me a message via Upwork. I will contact you as soon as e-mail notification hits my inbox.
    Featured Skill JavaScript
    Project Management
    Account Management
    UX & UI Design
    Quality Assurance
    Ruby on Rails
    Ruby
    Django
    Python
    Golang
    Vue.js
    React
    Laravel
    Symfony
    PHP
  • $20 hourly

    • 0.0/5
    • (0 jobs)
    I am an experienced software developer with over 5 years of experience in this field. Proven experience of successfully participating in 5+ projects of varying size and complexity, with a focus on front-end development using JavaScript and Angular. I have a good understanding of object-oriented concepts and can work according to the Scrum methodology. I have strong problem-solving skills, the ability to learn quickly, and an open-minded, goal-oriented approach. Technological skills in HTML and CSS design. I enthusiastically embrace new challenges and actively contribute to a collaborative team environment.
    Featured Skill JavaScript
    ClickUp
    Jira
    Figma
    Angular Material
    Azure DevOps
    GitLab
    Git
    SCSS
    CSS 3
    HTML
    RxJS
    Bootstrap
    TypeScript
    Angular
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    Hi, I am a full stack web developer with 8 years background in web development. Actually, I love web development and have ever worked and kept good relationship with many great clients and developers all over the world. During that time I built various type web applications including portfolio website, CMSes, CRM, SPAs, and PWAs. Here is my skill set of web development: ▲ Front-End & JavaScript I really have rich experience in JavaScript and JavaScript Framework including React, Vue and Redux. Especially React is my favorite JavaScript Framework and I am very familiar with React. ● React I have been working with React for over 4 years. During that time I built 18 websites and worked on 6 large projects. ✓ Good Knowledge and Experience React Workflow & Flux Architecture & Component-Based Programming. ✓ State Management Redux( used it on 12 projects ) and Mobx ( 6 projects ) ✓ Rich Experience in React DOM and related packages including React-DND, React BNB... ✓ Good usage of React Components - Static Component, Stateless Component, Default Component... ✓ Good usage with various type frontend libraries including Twitter Bootstrap (React-Bootstrap), Google Material Design (React-Material), Semantic UI, Kendo UI, Ant Design. ✓ Rich experience in Server-Side Rendering - Next.js ✓ Integrating local and third-party APIs of the social website ( Facebook, Twitter, Linkedin, Google Maps ) - Redux-Thunk, Redux-Saga. ✓ Implementation OOP with TypeScript ( React-TypeScript ). ✓ Unit Testing & E2E Testing with Jest and Mocha/Chai. ✓ Implement GraphQL with React-Apollo. ✓ Integrating with Data Management System - Firebase, Redis, Cloudinary... ✓ Data Visualization with D3.js, Three.js, Go.js - React-D3 ✓ Toolkit - Webpack, Gulp, Grunt ✓ Utility Functionality Libraries - UnderScore & Lodash. ✓ Native App Development with React Native. ▲ Backend & PHP & Node & Ruby. Definitely, I have been working with Node for over 8 years. ✓ Node - Express, Meteor ✓ Database - MySql, PostgreSQL, MongoDB, Maria DB. ✓ Rich knowledge and experience in Authentication & OAuth 1.0, OAuth 2.0. ✓ Scrapping & Crawling... ✓ Unit testing with PHPUnit & Mocha/Chai ✓ Good Knowledge in Best Practice in Software development - Airbnb, SOLID Principle, Design Pattern - MVC, OOP. ▲ DevOps Experience ( 2 years ) ✓ Good knowledge and experience in AWS, Heroku. ✓ Mastered AWS CLI, AWS EC2 AWS S3, and Docker. ✓ Familiar with JetBrains IDE - PHPStorm, WebStorm, Rubymine. ✓ Good Usage Linux, Ubuntu. I am equally comfortable owning an entire project or dividing the work across a team. Design patterns, test-driven development and agile methodologies are the primary paradigms and principles that I am proficient with. In my work and life, I always strive to do well and better.
    Featured Skill JavaScript
    AWS Lambda
    HTML
    CSS
    Angular
    PHP
    Vue.js
    Ruby on Rails
    Node.js
    React
  • $15 hourly

    • 0.0/5
    • (1 job)
    4x Certified Salesforce Professional with over 4 years of experience. I specialize in both back-end and front-end development, particularly in Apex, JavaScript, and Lightning Web Components (LWC), delivering high-quality solutions that enhance business processes and operational efficiency. Key Skills Developer: Apex Lightning Web Components (LWC) Triggers REST API VisualForce Administrator: Declarative Tools Flows Process Builders Salesforce Configuration Achievements Deduplication Process Improvement: Enhanced contact deduplication, significantly improving data accuracy. Mobile App Component: Developed a QR code scanning component for creating campaign members. Critical Issue Resolution: Identified and resolved a major data loss issue during integration in a large project. Technologies Languages: JavaScript, Java, Apex, SOQL, HTML, CSS Tools: Git, Bitbucket, VS Code, IntelliJ IDEA, Illuminated Cloud Salesforce: LWC, Aura, VisualForce, Einstein Next Best Actions Methodologies: Agile (SCRUM), JIRA, Confluence, MavenLink Professional Experience Salesforce Developer at Vaillant Group Business Services Sp z. o. o. (Nov 2023 - Present) Salesforce Developer at Britenet Sp z o.o. (Aug 2020 - Jul 2023) I am dedicated to delivering client-oriented Salesforce solutions that drive business success. Feel free to reach out to discuss your specific requirements!
    Featured Skill JavaScript
    Jira
    RESTful API
    Agile Project Management
    Bitbucket
    CSS 3
    Git
    HTML
    CSS
    Apex
    Salesforce Lightning
    Salesforce Sales Cloud
    Salesforce
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    Resourceful Front End Web Developer bringing in-depth knowledge of up-to-date technology trends to produce clean website design. Experience handling complex HTML and CSS coding, design and extensions to meet organization's front-facing internet needs. Detail-oriented collaboration with others to define project expectations and demand. Hands-on testing and debugging to address inconsistencies and maintain performance thresholds. Specializing in collaborating with loyal customers to gather requirements, produce plans and improve designs for usability and functionality. Fully proficient in WordPress, Python, JavaScript, TypeScript, Java, PHP, ES6, React/MERN, Vue.js/MEVN, Node/Express, MongoDB, PostgreSQL.
    Featured Skill JavaScript
    AWS Lambda
    ExpressJS
    HTML
    Vue.js
    CSS
    Git
    Laravel
    Angular
    WordPress
    React
    Python
    PHP
    Django
    Node.js
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    Resourceful a Full Stack Web Developer bringing in-depth knowledge of lastest technology trends to produce clean website design. Experience handling complex HTML and CSS coding, design and extensions to meet organization's front-facing internet needs. Detail-oriented collaboration with others to define project expectations and demand. Hands-on testing and debugging to address inconsistencies and maintain performance thresholds. Specializing in collaborating with loyal customers to gather requirements, produce plans and improve designs for usability and functionality.
    Featured Skill JavaScript
    React
    PHP
    Python
    WordPress
    Next.js
    MongoDB
    Laravel
    Django
    Node.js
    HTML
    ExpressJS
    Nuxt.js
    CSS
    Vue.js
  • $7 hourly

    • 0.0/5
    • (1 job)
    I'm a freshman with a IT technician grade. I'd like to learn some new thing and also have fun durning my job. I have learned some basic languages, but i hope it is enough to get started.
    Featured Skill JavaScript
    Windows Server
    MySQL
    CSS
    HTML
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    I am a Python & Frontend Developer with experience in building web applications using Django, FastAPI, and React. I specialize in: Web development (Django, FastAPI, React, MySQL) Web scraping & automation (BeautifulSoup, Selenium, Scrapy) REST API development & integration Fixing bugs & optimizing performance Need a fast and efficient solution? I’m here to help! 🚀 I am highly motivated, detail-oriented, and always eager to learn new technologies. Let’s discuss your project needs – I’d love to help!
    Featured Skill JavaScript
    React
    Automation
    API Development
    Web Scraping
    FastAPI
    Linux
    GitHub
    Git
    MySQL
    Django
    Python
    CSS
    HTML5
    Web Development
  • $10 hourly

    • 0.0/5
    • (0 jobs)
    My name is Oleksii, and am an aspiring programmer. Since childhood, I have been fascinated by computers and technology, which led me to choose IT as my future career. This decision is a conscious step toward achieving my professional dreams. Having completed two courses in Python, Data Science, and testing, I have gained foundational knowledge and skills that I am ready to apply in real-world projects. My interests include data analysis, developing useful software, and testing, which allows me to approach tasks from multiple perspectives. I am looking for a team of like-minded individuals where I can contribute and continue learning. My main goal is to create products that solve user problems and bring real value. I am committed to continuous skill development to improve myself every day.
    Featured Skill JavaScript
    Web Development
    PostgreSQL
    Web Scraping Framework
    Web Scraping
    API Integration
    Django
    CSS
    HTML
    Python
  • $20 hourly

    • 0.0/5
    • (0 jobs)
    Experienced Freelancer in Web Development with expertise in: React.js, TypeScript, DevExtreme, Material-UI, React Query, React Router, Redux, Docker, Flutter, Dart, Node.js, and Express. Hello! My name is Maksym, and I am a professional web developer with extensive experience in creating scalable and efficient web applications. My skills lie in using cutting-edge technologies such as React.js, TypeScript, DevExtreme, Material-UI, React Query, React Router, Redux, Docker, Flutter, Dart, Node.js, and Express. Key Competencies: React.js and TypeScript: Developing user interfaces using modern practices and technologies. DevExtreme and Material-UI: Experience working with libraries to build stylish and functional interfaces. React Query and Redux: State management of applications to ensure optimal performance. React Router: Creating navigation solutions for multi-project applications. Docker: Containerizing applications for portability and dependency management. Flutter and Dart: Mobile app development using a cross-platform framework. Node.js and Express: Server-side development for building efficient and scalable web applications. Why Choose Me? I offer not only technical expertise but also a commitment to high-quality code, paying attention to details, and meeting client requirements. My projects are always geared towards achieving the client's business goals, ensuring efficiency and long-term sustainability. I would be delighted to participate in your project and help you achieve your goals in web development. Let's collaborate to accomplish your ambitious tasks!
    Featured Skill JavaScript
    Mobile Development Framework
    Dart
    Flutter
    Router
    DevExpress
    Material UI
    Redux
    TypeScript
    React
    Front-End Development
  • $20 hourly

    • 0.0/5
    • (0 jobs)
    Thanks for stopping by my profile! I'm a seasoned Back-End Software Engineer with 3+ years of experience in development. Skilled in creating user-friendly and responsive web applications. Involved in all stages of development: design, implementation, testing, and maintenance. I excel at communicating with team members and always enjoy helping others or seeking assistance from more knowledgeable and experienced colleagues. I have experience collaborating with clients and am skilled at translating business requirements into code.
    Featured Skill JavaScript
    CI/CD
    Redis
    FastAPI
    Docker
    Telegram API
    SQLAlchemy
    Node.js
    Google Cloud Platform
    Django
    API Development
    GitHub
    PostgreSQL
    MongoDB
    Python
  • $25 hourly

    • 0.0/5
    • (0 jobs)
    Technical team lead with more than 10 years of experience in the Web development Field. Solid skills in complex Applications, delivering planning, design and Scoping for enterprises. Ability to manage and mentor a team of other seniors and juniors to complete their tasks.
    Featured Skill JavaScript
    Azure App Service
    Bootstrap
    Domain-Driven Design
    Multithreaded Programming
    Angular
    LINQ
    .NET Core
    SignalR
    Reactive Programming
    Azure DevOps
    SQL
    Entity Framework
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