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Hire the best React.js Developers in Lithuania

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  • $35 hourly

    • 5.0/5
    • (19 jobs)
    Hi, I’m an engineer with over 10 years development experience. There are projects of various complexity in my portfolio: starting from simple landing page, ending with complex job search systems. Currently, I specialize in developing solutions for e-commerce. I am a certified expert in developing themes and applications for Shopify. I am passionate my work and committed to delivering clean, easy-to-understand code and exceptional customer service. I am ready to offer cooperation in the following areas: Shopify App Dev - development of applications of any complexity Shopify Theme Dev - developing themes that meet modern trends and requirements of shopify Shopify Theme Customization - refine existing themes to the needs of your business Web Accessibility - analyze your site and achieve WCAG accessibility principles. My technical skills include: HTML, CSS, Javascript, jQuery, React, Typescript, Redux, Next.js, Node.js, SQL, MongoDB, PHP, Liquid (Shopify template language), WCAG. If you are looking for a confident, skilled, and experienced developer to bring your vision to life, please do not hesitate to contact me. I would be happy to discuss how I can help your Shopify website and online business succeed.
    Featured Skill React.js
    Shopify
    Shopify Apps
    Shopify Theme
    Ecommerce
    Web Design
    Shopify Plus
    Web Accessibility
    CSS 3
    HTML5
    React
    JavaScript
    Node.js
    Platform Plugin
    MySQL
  • $32 hourly

    • 5.0/5
    • (4 jobs)
    With over 3 years of experience in web and e-commerce development, I specialize in creating smooth, scalable solutions that drive business growth. My expertise includes MedusaJS, Next.js, Payload CMS, Strapi CMS, Docker, VPS, and Tailwind CSS. I enjoy tackling challenges and turning complex problems into simple, effective solutions. Complete E-Commerce Solution I offer a complete e-commerce solution, creating and hosting custom e-commerce setups using a modern tech stack: • Content managed seamlessly with Strapi CMS for easy content updates and organization. • Frontend built with Next.js for a dynamic and high-performance user experience. • E-Commerce powered by MedusaJS to manage product catalogs, orders, and customer data. • I handle essential connections, including: - Google Analytics via Google Tag Manager with server-side tagging. - Supabase for secure and reliable database management. - S3 for scalable file storage. - Secure payment processing with Stripe. - Email integrations with providers like Brevo or SendGrid. - Hosting: All server-based services can be containerized with Docker and hosted on a VPS, ensuring high performance, scalability, and easy maintenance. My Approach When you work with me, you can expect a partnership that emphasizes open communication and collaboration. I take the time to understand your business goals and requirements, aiming to deliver an e-commerce setup that exceeds expectations. Whether you’re launching a new online store or improving an existing one, I’m dedicated to providing a customized solution that fits your needs. If you're looking for a reliable e-commerce specialist who delivers quality results using the latest tech, I’m here to help. Let’s turn your vision into reality!
    Featured Skill React.js
    SEO Writing
    SEO Backlinking
    Ecommerce
    Ubuntu
    Docker Compose
    Docker
    SCSS
    Next.js
    Jest
    CSS
    JavaScript
    React
    Git
    HTML
    TypeScript
  • $45 hourly

    • 4.7/5
    • (2 jobs)
    Frontend developer with product design skills. I am experienced in React/JavaScript, html5, css3, firebase/firestore.
    Featured Skill React.js
    Redux
    Mobx
    React Native
    Tailwind CSS
    CSS 3
    HTML5
    Front-End Development
    Responsive Design
    Web Development
    Figma
    React
    JavaScript
    GitHub
    TypeScript
    Git
  • $35 hourly

    • 5.0/5
    • (45 jobs)
    Frontend nextJS and design. I am a TOP RATED freelancer on Upwork with more than 20 years of experience with UX/UI design and 10 in front-end development. I have a big passion for developing and lunching amazing projects My skills: - next is, react, tailwind, tailwind / bootstrap / foundation and others - web and mobile design. UI/UX, Figma - html / pug / JS / SASS / CSS / jinja / nunjucks, BEM, Webpack / GULP / NPM / git. I worked with so much things that hard to list them all. DM to discuss you project
    Featured Skill React.js
    Node.js
    SCSS
    PSD to HTML
    CSS
    Bootstrap
    JavaScript
    HTML
    Web Development
    Graphic Design
    Tailwind CSS
    React
    Next.js
    Responsive Design
    Web Design
    Figma
  • $30 hourly

    • 5.0/5
    • (6 jobs)
    Hello and welcome to my profile! I am a passionate and dedicated freelance web developer with a flair for creating innovative, user-friendly, and responsive websites. With 5 years of experience in the field, I specialize in bringing clients' visions to life by creating professional websites. What I Offer: Web Development: Specialized in HTML, CSS, JavaScript, PHP, and popular CMS like WordPress and Webflow. Whether you need a single-page application or a complex web system, I ensure seamless functionality and performance. E-commerce Solutions: Offering comprehensive e-commerce website solutions, including shopping cart integration, payment gateway setup, and user-friendly product catalogs. SEO and Mobile Optimization: Understanding the importance of SEO, I ensure all websites are optimized for search engines. Additionally, I put a lot of effort into mobile responsiveness for an optimal viewing experience across all devices. Ongoing Support and Maintenance: Committed to long-term partnerships, I provide ongoing website support and maintenance to ensure your site always remains up-to-date. Why Choose Me? Client-Centric Approach: Your vision is my guide. I work closely with you at every step to ensure the final product aligns with your expectations. Timely Delivery: Respect for deadlines is paramount. I pride myself on delivering projects on time without compromising quality. Open Communication: Clear and continuous communication is key. I stay in touch with regular updates and am always available to discuss ideas or concerns. I am excited to help you build your digital presence. Let's create something remarkable together!
    Featured Skill React.js
    WooCommerce
    SEO Audit
    Figma
    Webflow
    WordPress Development
    UX & UI
    Web Design
    Tailwind CSS
    PHP
    React
    CSS
    HTML
    JavaScript
    WordPress
    Web Development
  • $80 hourly

    • 5.0/5
    • (13 jobs)
    I'm Tautvydas, Shopify app developer with extensive experience building custom solutions using Remix, React, Polaris, Prisma, and Node.js. I’ve worked on a wide range of projects from small/niche apps to powerful and user-friendly apps that elevate e-commerce stores to next level . Please feel free to contact me to discuss your project and explore how I can help you achieve your goals Drop me a line if you'd like to work together!
    Featured Skill React.js
    Nuxt.js
    Web Development
    Next.js
    Node.js
    React
    Vue.js
    Search Engine Optimization
    TypeScript
    MongoDB
    JavaScript
    WordPress
  • $50 hourly

    • 5.0/5
    • (4 jobs)
    If you’re a founder, agency owner, or business professional with an idea, I’m here to make it a reality in 2 weeks or less. I have over 5 years of experience and a proven track record of building startups. What I Bring to the Table: ===Startup Experience Across Industries:=== 1. Built industrial digitalization software in Germany. 2. Developed business management platforms for SMEs in Lithuania. 3. Designed mentoring platforms in the US. 4. Worked on payment processing platforms for startups in Lithuania and Israel. 5. Contributed to infrastructure-as-a-service platforms for niche customers. 6. Managed banking processes on mainframe systems using PL/I during a one-year stint at Danske Bank. ===Personal Startup Projects:=== 1. LlmChef: Simplifies AI prompt engineering for businesses and individuals. 2. subout: Helps users efficiently track subscriptions. 3. Seosys: Uses AI-generated articles to boost SEO for next-gen websites. 4. Mem Mom: A mobile app to help mothers save memories of their children growing up. 5. SheetsLord: A quick way to view and edit massive spreadsheets in a form view. 6. WinPal: A Windows companion app for saving clipboard history and audio transcriptions. 7. Exocortex: A personal knowledge management app to capture my ideas saved on WhatsApp. ===What I Can Do for You:=== 1. Quickly prototype and launch an MVP for your idea, leveraging AI, software engineering, and scalable development practices. 2. Build solutions tailored to your market, whether it’s SaaS, platforms, or AI-powered tools. 3. Offer guidance and insights based on my extensive startup experience, ensuring you avoid common pitfalls. ===Why Work with Me?=== I don’t just code—I understand business. I’ve worked with startups globally, from Lithuania to the US, and I know what it takes to build and launch ideas. When you collaborate with me, you’re not just hiring a developer; you’re partnering with someone who has walked this path before and succeeded. Let’s take your idea from concept to reality. Ready to get started? Let’s chat!
    Featured Skill React.js
    Flutter
    HTML5
    Artificial Intelligence
    TypeScript
    Mobile App
    React Native
    React
    Tailwind CSS
    Next.js
    JavaScript
    NodeJS Framework
    Web Development
  • $38 hourly

    • 4.9/5
    • (15 jobs)
    I build custom web and mobile applications that solve your problems. I approach projects in an agile manner and strive for perfection.
    Featured Skill React.js
    Agile Project Management
    React Native
    Continuous Integration
    Testing
    Google Cloud Platform
    Amazon Web Services
    React
    Docker
    Laravel
    Vue.js
  • $90 hourly

    • 5.0/5
    • (3 jobs)
    Are you in need of a Web3 expert with a proven track record of success? I have 6+ years of experience in the industry, working with startups backed by top venture capital firms. My expertise has led to successful fundraises of over $40M and I have a history of building MVPs in under 3 months with high client satisfaction. For the last 2.5 years I've been working as a CTO at Donut.app (US based Web3 savings startup). 🚀 My expertise lies in supporting clients who have a clear vision and are eager to take their Web3 projects and ideas to new heights. I can help you if you are: - Looking to launch an MVP in Web3 / Fintech / AI areas - Facing complex technological challenges - In need of research and technical analysis - Building or auditing NFT and smart contract projects I am dedicated to help you achieve your goals. ✅ When you work with me, you can rest assured that you won't have to worry about: - Unforeseen budget issues (I will provide detailed estimates and confirm the scope and budget in advance, so there are no surprises) - Lack of visibility into the project progress (I use Trello to keep you updated on the progress in real-time and am always available to communicate via slack, evenings, and weekends) - Unmet urgent needs (I prioritize addressing any issues that arise and work to resolve them as quickly as possible) ✖️ However, I am not a good fit for clients who: - Seek junior developers to write basic code - Require only small bug fixes - Do not value trust and respect as important principles. If these values do not align, we may not be the best match for each other 👤 About me. I am capable of taking your idea from conception to launch, with full stack implementation capabilities. In my work, I have utilized the following technologies: -Backend: NestJS, Golang -Frontend: React Native, Vanilla JS -Smart contracts: Solidity I also have hands-on experience with the following libraries and tooling: -Blockchain: Alchemy, Moralis, Ethersjs, Hardhat -Fintech: Plaid, Saltedge, Synapsefi.com -AI: OpenAI -Cloud: AWS, GCP Please see my portfolio and references for examples of my capabilities. I am available for a video call to discuss how I can assist you further.
    Featured Skill React.js
    NestJS
    React Native
    Amazon Web Services
    Mobile App
    React
    Google Cloud Platform
    Artificial Intelligence
    Web3
    Blockchain Architecture
    web3.js
    Node.js
    Blockchain Development
    NFT
    Solidity
    Ethereum
  • $40 hourly

    • 5.0/5
    • (12 jobs)
    I am a full-stack web developer. I mainly focus on working with JavaScript projects. I have experience working with e-commerce, freight exchange, travel industry projects. I am able to create a pixel-perfect UI and write efficient APIs. I have been working as a full-stack web developer since 2018. I have graduated with a bachelor's degree from the Kaunas University of Technology. I have been working with these technologies in the front-end: Angular.JS, RxJs, NgRx, React.Js, Gatsby.Js, React Redux, Tailwind CSS and these technologies in the back-end: Express.Js, Loopback, Contenful CMS, Wordpress API, Google API, Stripe API, MongoDB
    Featured Skill React.js
    Static Site Generator
    Angular Material
    Tailwind CSS
    Gatsby.js
    ExpressJS
    GraphQL
    TypeScript
    LoopBack
    JavaScript
    MongoDB
    React
    AngularJS
    PrestaShop
    Angular
  • $50 hourly

    • 5.0/5
    • (9 jobs)
    ✅ High Quality ✅ Clean Code ✅ In-Time Delivery "I would be the right person. I never compromise with the quality of delivery & Client satisfaction is my main motto" Experienced developer with minimum 8+ experience ( Javascript / Node.js / React.js / Vue.js / Flutter / PHP / WordPress / Custom PHP / MySQL / PostgreSQL / MongoDB / HTML / CSS ) capable of creating advanced Websites and custom web applications. I offer complete web application development and integration services. Skills: 1. Front-End: ◾ Javascript / ES6+ / Typescript ◾ ReactJS / Redux / Next.js / Storybook / Styled Component ◾ VueJS / Vuex / Nuxt.js ◾ Server-Side Rendering (Gatsby.js / Next.js / Nuxt.js) ◾ CMS: WordPress 2. Backend Development ◾ Node.js / Express.js / NestJs ◾ PHP / Laravel / WordPress 3. Database ◾ MongoDB/ Redis / Realm ◾ MySQL / PostgreSQL 4. Other skills ◾ Docker / AWS / Heroku / Hezner / DigitalOcean / Nginx ◾ Bootstrap / Material-UI / Ant Design ◾ RESTful / GraphQL / Axios / Web socket ◾ Mongoose / Knex.js / Sequelize
    Featured Skill React.js
    Laravel
    Front-End Development
    React
    Node.js
    Gatsby.js
    NestJS
    Vue.js
    ExpressJS
    Web Application
    Website Optimization
    Nuxt.js
    Next.js
    TypeScript
    JavaScript
    PHP
  • $35 hourly

    • 5.0/5
    • (3 jobs)
    👋 Hey, there! I'm a seasoned front-end React developer, specializing in crafting dynamic and user-friendly web experiences. Proficient in the intricacies of front-end development, I bring a wealth of organizational experience to the table. With a robust foundation in Computer Science, I'm adept at swiftly adapting to project requirements, ensuring timely delivery without compromising on quality. My commitment extends beyond mere technical proficiency – I consistently take ownership of the entire product development process, always with the end-user in mind. My Stack: 🔥 Front-end: JavaScript, TypeScript, React, Redux, React Query, React Table Redux, Next.JS, CSS3 (Sass), HTML5 (Flexbox, Grid), Bootstrap, Tailwind CSS, MUI, styled components, Swiper, T3 app, npm 🔥 Testing: Postman 🔥 Databases: MongoDB, MySQL, Firebase, Json Server, AWS S3, AWS RDS, Prisma 🔥 Distribution: Netlify, Vercel, GitHub Pages 🔥 VCS: git (GitHub), Bitbucket 🔥 Design: Figma Let's collaborate to bring your vision to life with a focus on cutting-edge front-end technologies, particularly React.
    Featured Skill React.js
    Web Development
    Figma
    HTML
    Front-End Development
    Tailwind CSS
    SCSS
    Next.js
    Redux
    TypeScript
    JavaScript
    React
  • $34 hourly

    • 4.8/5
    • (4 jobs)
    🤝 My goal is to help you bring your projects to life, whether starting from scratch or enhancing existing applications. I've successfully worked on a wide range of projects, delivering exceptional results that meet and often exceed client expectations. Whether it's a complex web application or a simple website, I bring the same level of dedication and expertise to every project. Why Choose Me? 🟢 I have hands-on experience in building projects from scratch as well as maintaining and enhancing existing ones. No matter the stage of your project, I'm here to help it succeed. 🟢 Need someone who can work with your schedule? I'm flexible with any time zones 🟢 Your success is my top priority. I love tackling challenges and finding innovative solutions to meet your project's needs. 🟢 I believe in building great working relationships. My approach is professional yet friendly, making collaboration enjoyable and productive. 🦾 Key Skills: Front-end: JavaScript, TypeScript, React, ReactQuery, Redux, Redux Toolkit, Bootstrap, npm, Three.js, Phaser, Zustand, CSS3 (Sass), HTML5 (Flexbox, Grid), React Native, Vue (courses and pet project) Design: Figma, Semantic UI, pixel-perfect, Storybook, Material UI, Radx UI, Tailwind, CSS Modules, Styled-Components Back-end: Next.js, Node.js, Express, Socket.io, Python, Flask Databases: MySQL, Firebase, MongoDB, DynamoDB Methodologies and tools: git (GitHub), GitLab Cloud: Amazon Web Services (Lambda) Hosting: Vercel, GitHub pages, Heroku, Netlify, Railway CMS: Sanity 🤙 Let's Work Together!
    Featured Skill React.js
    Klaviyo
    GitLab
    AWS Lambda
    REST API
    Vercel
    Firebase
    Socket.io
    Sanity Testing
    Git
    PostgreSQL
    TypeScript
    NestJS
    Node.js
    Next.js
    React
  • $35 hourly

    • 5.0/5
    • (4 jobs)
    Hi there, I'm Vlad Novik, a web developer with 8 years of experience in both front-end and back-end development. My passion for technology and creating innovative solutions has driven me to build a diverse skill set that includes HTML, CSS, JavaScript/TypeScript, Browser Extension APIs, React/Next, Vue/Nuxt, Angular, ASP.NET, Node.js, and more. If you're looking for a skilled and reliable web developer, look no further. Let's work together to bring your vision to life! Thank you for considering my profile, and I look forward to the opportunity to work with you.
    Featured Skill React.js
    Azure App Service
    ASP.NET Core
    JavaScript
    TypeScript
    Browser Extension
    Vue.js
    Nuxt.js
    React
    Next.js
    Angular
  • $50 hourly

    • 5.0/5
    • (3 jobs)
    🤝 I excel at delivering innovative technology solutions for a wide range of industries, including fintech, e-commerce and real estate. My goal is help you bring your project to life. My expertise includes designing and implementing custom software solutions that meet complex business requirements, integrating with third-party systems, and managing data architecture. In addition to my technical expertise, I specialize in front-end technologies, with a particular focus on React. I’m skilled at developing intuitive and engaging user interfaces that enhance the user experience and drive customer satisfaction. 💪 Key skills: Front-end: JavaScript, TypeScript, React, ReactQuery, Redux, Redux Toolkit, Bootstrap, npm, Tailwind CSS, GraphQL, DaisyUI, SolidJS, UnoCSS, Zustand, Phaser, CSS3 (Sass), HTML5 (Flexbox, Grid). Design: Figma, Semantic UI, pixel-perfect, Storybook, Material UI, Radx UI, Tailwind, CSS Modules, Styled-Components Back-end: Next.js, Node.js, Express, Socket.io DevOps tools: Docker, AWS (EC2, RDS, API Gateway, Lambda, DynamoDB, SQS, CloudFront) Databases: PostgreSQL, MySQL, Firebase Blockchain development: Wagmi, Viem (Ethers, Web3.js), Solidity, Truffle Framework 🤙 Let's Work Together!
    Featured Skill React.js
    Front-End Development
    Firebase
    Tailwind CSS
    Django
    Python
    Full-Stack Development
    Redux
    GraphQL
    Docker
    Next.js
    TypeScript
    React
  • $60 hourly

    • 5.0/5
    • (1 job)
    For the past 2 years, I’ve worked hands-on with OpenAI’s API since the release of GPT-3.5, serving as the Lead Developer and Solution Architect for EdTech startups and agencies. The small and medium enterprises I’ve worked with wanted solid ROI on their GenAI investments, and I was there to make that a reality by implementing custom AI solutions tailored to their unique needs. Imagine scaling your business effortlessly with AI-driven tools that cut costs, automate workflows, and unlock new growth opportunities. My work has helped businesses not only maximize profit margins and boost productivity but also expand their potential for greater impact and innovation. For example: - I developed an AI-powered chat assistant that reduced tutoring costs by 70% for an EdTech startup while improving student engagement. - I implemented an AI-driven CMS for a STEM learning company, boosting tutor productivity by 12% and cutting administrative workload. - I created a GPT-powered agentic workflow automation system that decreased AI response error rates by 3x and reduced operational workload by 10-30% for an EdTech startup. HERE’S HOW I INTEGRATE GEN AI: 💡 OpenAI Technologies I specialize in leveraging OpenAI’s suite of advanced models, including GPT-4, o1-preview, and Whisper, to create intelligent features like conversational AI, transcription, and complex task automation. These tools are tailored to deliver exceptional results that align with your business goals. 💻 Full-Stack Development I handle every stage of development—from initial planning and coding to deployment. With expertise in front-end technologies and a focus on building scalable back-end systems using AWS, I ensure seamless integration of AI into your workflows. ☁️ AWS Solutions For robust and secure back-end systems, I utilize AWS’s scalable infrastructure, focusing on serverless architecture to deliver cost-effective, high-performance solutions that grow with your business. 💬 Let’s connect and explore how we can turn your ideas into scalable, profitable solutions that take your business to the next level. 💼 See my previous work and projects in my PORTFOLIO: augustinastech.com
    Featured Skill React.js
    Agent GPT
    GPT API
    Node.js
    Python
    React
    Cloud Application
    Cloud Architecture
    Prompt Engineering
    Full-Stack Development
    Amazon Web Services
    AI Implementation
  • $67 hourly

    • 5.0/5
    • (20 jobs)
    I’m a Full Stack Developer specializing in Laravel, Node.js, Kubernetes, and Tailwind. I have been a full-time freelance developer since 2010, delivering scalable and efficient web solutions for clients across various industries. I believe programming is about solving real problems for clients—not just writing code. My expertise spans front-end, back-end, and DevOps, with proficiency in PHP, JavaScript, HTML, CSS, MySQL, MongoDB, and frameworks/tools such as Laravel, WordPress, Vue.js, React.js, Tailwind, SCSS, LESS, Kubernetes, Fission.io, and OpenFaaS. I’m also skilled in Linux server administration, handling setup, deployment, and maintenance for on-premise or cloud environments. From small websites to complex applications, I focus on practical solutions that align with project goals. I manage every stage of web application development, from crafting user interfaces to implementing back-end logic. Clear communication, problem-solving, and timely delivery guide my work, and my aim is to build robust, results-driven solutions that help businesses enhance their online presence or streamline internal processes. If you’re looking for an experienced full-stack developer to help solve your business challenges, feel free to reach out and discuss your project needs.
    Featured Skill React.js
    LAMP Stack
    Tailwind CSS
    React
    NGINX
    Vue.js
    MySQL
    MongoDB
    JavaScript
    PHP
  • $34 hourly

    • 5.0/5
    • (54 jobs)
    6+ Years of experience in Frontend development field. 💯 Expertise in building dynamic user interfaces with React.js, Next.js and React Native. 🚀 Proficient in optimizing performance, enhancing site speed, and implementing SEO best practices. ✅ Skilled in implementing responsive design and modern UI/UX principles for visually appealing web applications. "Mintaras helped us with a variety of problems with the site: from database and formatting issues to problems with site migration to a new server. His English is excellent and he is honest, quick, and reliable. We don't have a lot of money and he worked within our budget. I recommend him highly." Latest showcases: ✅ Converted Figma designs into responsive and interactive landing pages using React.js & Next.js. Developed and tested multiple user registration flows to ensure a smooth onboarding experience. - Successfully launched high-converting landing pages, driving a 25% increase in user sign-ups. - Enhanced security and user experience through robust and tested registration flows. ✅ Regularly updated the platform using React.js and TypeScript to incorporate new insurance products and comply with regulatory changes. Conducted code reviews and refactoring to ensure code quality and performance. Worked closely with backend developers to integrate RESTful APIs and ensure smooth data flow between the front-end and back-end systems. Coordinated with UX/UI designers to implement user-friendly interfaces. - Improved data accuracy and reporting capabilities, enhancing decision-making processes for brokers. - Achieved high user adoption rates and positive feedback from agents and brokers. ✅ Implemented the front-end of the lending platform using React.js, Redux ensuring a seamless and responsive user interface. Integrated various API endpoints for data processing. Conducted performance optimizations to reduce page load times and enhance the overall user experience. Utilized Cypress for end-to-end testing to ensure reliability and functionality across different user scenarios. - Reduced average loan application time by 30%. - Increased user satisfaction through improved UI/UX and enhanced performance.
    Featured Skill React.js
    CSS
    HTML5
    Front-End Development
    JavaScript
    Next.js
    React
  • $45 hourly

    • 4.9/5
    • (20 jobs)
    I am a Full-Stack Developer with expertise in low-code development, AI-powered automation, API integrations, and full-stack web applications. With over 10+ years of experience and 40+ successful Retool projects, I help startups, mid-size businesses, and enterprises optimize workflows, build scalable applications, and automate operations. ⚡ Services I Offer: 🛠 Low-Code Development ✔️ Custom Dashboards & CRMs (Analytics, Workflow Automation, Admin Panels and Portals) ✔️ API Integrations (Stripe, Google Sheets, Zapier, Airtable, SQL) ✔️ AI-Enhanced Solutions (Chatbots, AI Data Processing, GPT-4 API Integration) 💻 Full-Stack Development & Automation ✔️ Front-End Development – React, Next.js, Angular, Vue.js ✔️ Back-End & Database Setup – Node.js, Java, PostgreSQL, Supabase, Firebase, MongoDB ✔️ AI & Automation – GPT API, OpenAI, ChatGPT, AI Agents 📊 Technologies & Tools: ✔️ Languages: JavaScript, TypeScript, SQL, HTML, CSS ✔️ Databases: PostgreSQL, Firebase, MongoDB, MySQL, Supabase ✔️ Cloud & DevOps: AWS, Azure, Docker, Kubernetes, GitHub Actions ✔️ Low-Code Tools: Retool, Airtable, Xano, Supabase, Make (Integromat), UI Bakery, AppSmith, Zoho, Budibase, ToolJet, Powerapps (Microsoft Power Apps) ✔️ Frameworks & Libraries: React, Next.js, Vue.js, Express.js, NestJS 🏆 Why Work With Me? ✅ Top-Rated Plus on Upwork with 100% Job Success ✅ 10+ Years Experience in Full-Stack Development & Low-Code Automation ✅ Proven Track Record – 2,600+ Hours & $100K+ Earned ✅ Scalable & Future-Proof Solutions – Focused on Performance & Security 📩 Let’s build your next project! Contact me today for a free consultation 🚀
    Featured Skill React.js
    Make.com
    AI Implementation
    AI Development
    AI Chatbot
    API Integration
    Java
    TypeScript
    Front-End Development
    Full-Stack Development
    Airtable
    Zapier
    Low-Code Development
    MongoDB
    React
    JavaScript
  • $38 hourly

    • 4.9/5
    • (49 jobs)
    👋 Hey, there! With 10+ years of experience, my expertise centers around elevating companies and startups with robust, scalable web solutions, leveraging the advanced front-end technologies of React, Next.js. Our engineering force is hungry to close your needs through in-time delivery of tech solutions. Testimonials: ⭐ “We hired CreativeIT because we weren’t happy with our previous developer’s performance. CreativeIT successfully completed a working app.” Dan Douglas, Co-founder, Deep English, USA. ⭐ “We’re very happy with their working methods”. Valery L, CTO, Starly.io, Baltic states. ⭐ “CreativeIT picked up where a previous vendor left off. They looked at the existing code and designs and created a plan for how to move forward”. Elliot Ledley Project Manager at 2Shoes, USA. ⭐ “CreativeIT’s ability to provide a complete product in a timely fashion was most impressive. In addition, communication was always clear”. Michael Oppel CFO at Audience Response System, USA. ⭐ “The team's ability to work fast impresses us!”. Director SE, Hospitality & leisure (Germany). Why choose me: ✅ Top Rated FullStack Developer. DNA: value first, green & transparent communication. ✅ Proactive developer. My work is always of the highest quality, so it helps maximize excellent ROI. I always meet tight deadlines, and assure job satisfaction from beginning till the end. ✅ Time & Material basis, so you will pay only for productive time. Our strong side: 🔥 Front-end: TypeScript & JavaScript, React, React Native, Redux/Zustand/MobX, GraphQL, HTML5, CSS3 (Tailwind CSS, Styled components, Sass, Bootstrap, MaterialUI, Flex, Grid), Three.js, etc. 🔥 Back-end: Node.js, Next.js, Nest.js, Express, Fastify. 🔥 Databases: PostgreSQL, MySQL, MongoDB, Redis. 🔥 Cloud: Firebase, Docker, AWS (EC2, RDS, API Gateway, Lambda, DynamoDB, SQS, CloudFront), Amplify. 🤙 Let's collaborate! Contact me for a project audit, technical consultation, or to develop a roadmap for your project. Looking forward to forging a long-term, win-win partnership. Cheers from Vilnius, Raman.
    Featured Skill React.js
    Vercel
    Python
    Back-End Development
    Full-Stack Development
    Database
    React Native
    User Experience Design
    Data Visualization
    Amazon Web Services
    Front-End Development
    Node.js
    TypeScript
    JavaScript
    Next.js
    React
  • $60 hourly

    • 4.9/5
    • (8 jobs)
    With over 8 years of dedicated experience in WordPress development, I specialize in creating bespoke solutions through custom plugins and themes to address client's unique requirements. Services Offered: - Custom WordPress Development: Tailored plugins and themes designed to meet precise client needs. - Client-Centric Approach: Committed to understanding and delivering on client objectives. - Extensive Industry Experience: Over 8 years of honing expertise in WordPress development. Why Choose Me? - Specialization in Customization: Proficiency in crafting personalized solutions for diverse projects. - Reliability & Excellence: Consistent delivery of high-quality work within designated timelines. - Client Satisfaction Focus: Ensuring client delight through effective, custom-tailored solutions. Approach If you're in search of an expert WordPress developer capable of translating ideas into functional, impressive WordPress solutions through custom plugins and themes, let's discuss your project requirements. I'm here to turn your vision into reality.
    Featured Skill React.js
    Figma
    Web Design
    Webflow
    WordPress Website Design
    WordPress Customization
    Web Development
    WordPress Development
    HTML
    Landing Page
    React
    CSS 3
    JavaScript
    HTML5
    WordPress
  • $68 hourly

    • 5.0/5
    • (22 jobs)
    2 decades exp of building business value through web tech. I started coding web back in 6-7th grade when most PCs had no internet and documentation was printed book. From 7th grade I already attended 2nd school of web tech and a couple years later was already building my own game servers. Fast forward a couple decades to today and you will find the same tech obsession. Let's build something, shall we? *Core experience* I focus more on the backend, though I did a lot of saas solo or with a team. Full-stack, backend, devops, integrations, marketplaces, business managing, creating from idea state to running product, MVPs. Been CTO at bootstrapped startup reaching $20M evaluation. Been 5-th dev at Hostinger (1k+ staff now). Built backend for dairy food global marketplace running at $1.4B/yr now. Been team lead at same place couple years later for devops and integrations. Redesigned legacy to new business setup for $350M/yr travel company. Built teams, products, APIs, integrations, servers, devops. *Execution* My goal is to collapse my experiences for your context and bring you business value through tech execution and insights. We first start talking about your context. What you try to do, what’s the long-term goal and what’s short-term goal, what issue you try to resolve. I give insights of how I see it, what I would prioritise from business and execution perspectives. I can build business solutions, hire, mentor, manage teams. I can build solo or join a team. I do not care about my title or position, but I do care about execution and value delivery of myself and my team. --- *Technical stack* I worked with most of the things that build up the web. Numerous popular and niche databases, infrastructures, code patterns, languages. That said, here is my current favorite stack which with my processes brings most value: - Fullstack TypeScript - Backend, Frontend, Desktop, Mobile. - Proper TDD: tests first, code next. Especially for the backend. CI/CD with high focus on having apps always in deliverable state. This is the fastest way to deliver quality software because it saves a ton of debug time and makes software way more flexible. - UI: NextJS, ReactJs. Tailwind CSS or UI libs like ant.design, mui.com. Electron, React Native. React-query, zustand, zod. - AI: I built multiple features based on OpenAi APIs. Have hands-on experience with open source AI models as mistral or llama. Was building cold email outreach and creating icebreaker lines and other content. Updated documentation for Composio.dev (was hired by them). - Backend: favor for traditional RESTful designs, by need - websockets. For queues - BullMq, SQS, SNS, AWS Streaming family of services. - Databases: Primary database MongoDb or PostgreSQL. For situations - DynamoDB. For backend state or cache - Redis. For best search UX - Meilisearch. For time series - Clickhouse. - Devops - I have 7yr+ of deep hands-on experience working with many AWS services. Serverless and traditional. Got extensive theoretical training and hands-on experience. Before AWS I used Google cloud for ±2 years, before Google cloud was ±10 years ago and "cloud" was not yet around like today. Was managing my servers by hand. Usually I rent some VPS and set it up, in some cases build my server. I was 5th fullstack developer (focus on backend) at Hostinger.com (global hosting provider) Experience ✅ 20 years of experience delivering business value through web tech ✅ 4 years of CTO experience running $20M evaluated company ✅ Experience building core business tech for startups and for huge corporations running at billions/yr ✅ TOP 3% developers worldwide from 2016 (google “Toptal lukas liesis”, Upwork prohibits links here) Biggest projects ✅ Biggest project by users count ±15M users. Was one of firsts developers in company running in 1 room (Founders + couple devs), when left in 2yr it had multiple global HQs. Hostinger ✅ Biggest project by money volume ±$1.4B/yr in transactions. Worked twice here. At early stage was lead dev for backend (±1500 api endpoints), years later rejoined as team lead for devops and integrations. TradeCafe. Tech ✅ NodeJS, ReactJS, OpenAI & Ollama, AWS EC2, AWS SES, AWS SQS, AWS ServerLess, Shell-script ✅ Databases. I've built from ground up with each: SQL, MongoDB, Redis, DynamoDB, Meilisearch, Clickhouse ✅ Built and designed custom APIs, sockets, RESTful, microservices Personal ✅ No "smart" code. Keep it simple, readable and maintainable. ✅ Master's degree in Physics ✅ I take ice-cold showers 🚿 ✅ check reviews on my LinkedIn I believe knowing tech is only one piece of the puzzle. I always keep professional communication. I ask people to speak with me clearly and without thinking, if I would take something personally - I won't. My mission is to make your business successful, that's it. Great communication is the key to a productive workflow. 🌟 I'm part of TOP 3% developers wo
    Featured Skill React.js
    Twitter/X Bootstrap
    Socket Programming
    PHP
    React
    CSS 3
    HTML5
    React Native
    JavaScript
    Node.js
  • $69 hourly

    • 5.0/5
    • (1 job)
    OBJECTIVE Improve every day. Lead the process to create a product that will help the organization to grow. Deliver with confidence and on time. Release frequent increments. Step forward and do the dreaded tasks first. Learn and improve while being outside of comfort zone.
    Featured Skill React.js
    LINQ
    .NET Core
    PostgreSQL
    SQL Programming
    REST API
    Test Automation
    Microservice
    Jira
    Engineering Management
    React
    TypeScript
    Continuous Integration
    NoSQL Database
    JavaScript
    SQL
    C#
  • $80 hourly

    • 5.0/5
    • (3 jobs)
    I have worked within the web development industry for over 10 years - In these 10 years I had a pleasure of working on various startups as well as fortune 500 companies such as spectrum.net. l've designed architectures and lead teams for smaller startups. I have a lot of experience with Angular / React / Vue.js together with TypeScript, HTML5, CSS3, Cypress (end to end testing), Jasmine / Jest (unit testing).
    Featured Skill React.js
    Unit Testing
    End-to-End Testing
    Front-End Development
    HTML5
    CSS 3
    Vue.js
    React
    Angular
    JavaScript
    TypeScript
  • $50 hourly

    • 5.0/5
    • (28 jobs)
    Transforming requirements into products in a clear and rapid manner. Developing software since 2013, I have accumulated an extensive set of skills. With professional experience in the industry and numerous projects on and beyond Upwork, as well as getting awards in 20+ hackathons across Europe and running a startup myself, I understand the importance of teamwork, task distribution, mutual respect, and continuous on-time product delivery. Tech stack: ~~~ ChatGPT ~~~ | Languages: Swift, Objective-C, Python, JavaScript, HTML+CSS, Java, C, C#, Bash; | Libraries: Tensorflow, Alamofire, OpenCV, NumPy, matplotlib, OneSignal; | IDEs: Xcode, Android Studio, PyCharm, Webstorm, IntelliJ, Unity, Visual Studio; | Databases: Firestore, Firebase RTDB, SQLite, PHPMyAdmin, PostgreSQL; | Integrations: Twilio, Firebase, Branch, Facebook SDK, Zapier, Mailchimp; | Graphics/rendering tools: Adobe Photoshop, Sketch, Zeplin, three.js; | Frameworks: React, React Native, Express.js, Django, Flask; | Issue/version tracking: Trello, Jira, GitHub, Bitbucket; | CSS rendering: less/sass, styled components; | Analytics: Firebase Analytics, Mixpanel; | UI Frameworks: Semantic UI, Antd; | Run-time environments: Node.js; | Cloud Services: AWS, CloudKit; | OS: Linux, MacOS, Windows; | Mapping platforms: Mapbox; | Dependencies: CocoaPods; | CMS: WordPress. I specialize in creating robust and scalable solutions, ensuring transparency and responsibility throughout the development process. By leveraging my skills, I aim to deliver high-quality products that meet client needs efficiently and effectively.
    Featured Skill React.js
    styled-components
    React Native
    Mapbox
    Firebase
    Swift
    API Development
    CSS 3
    React
    Next.js
    JavaScript
    Three.js
    HTML5
    Python
    Google Cloud Platform
    Node.js
  • $120 hourly

    • 5.0/5
    • (9 jobs)
    🚀 𝑬𝒎𝒑𝒐𝒘𝒆𝒓𝒊𝒏𝒈 𝒀𝒐𝒖𝒓 𝑩𝒖𝒔𝒊𝒏𝒆𝒔𝒔 𝒕𝒐 𝑺𝒄𝒂𝒍𝒆 𝒂𝒏𝒅 𝑺𝒖𝒄𝒄𝒆𝒆𝒅 𝑻𝒉𝒓𝒐𝒖𝒈𝒉 𝑺𝒕𝒓𝒂𝒕𝒆𝒈𝒊𝒄 𝑬𝒏𝒈𝒊𝒏𝒆𝒆𝒓𝒊𝒏𝒈 𝑳𝒆𝒂𝒅𝒆𝒓𝒔𝒉𝒊𝒑 With over 18 years of experience driving transformative solutions, I specialize in helping startups and established businesses achieve their goals by aligning technology with business strategy. Whether you're scaling a SaaS platform, navigating product development challenges, or optimizing team performance, I offer hands-on leadership to ensure your vision becomes a reality. 𝐊𝐞𝐲 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬: ⭐ 𝐄𝐱𝐩𝐞𝐫𝐭 𝐢𝐧 𝐒𝐜𝐚𝐥𝐢𝐧𝐠: Delivered high-availability systems supporting millions of users daily. ⭐ 𝐂𝐨𝐬𝐭 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧: Reduced operational costs by up to 40% while improving delivery speed and quality. ⭐ 𝐋𝐞𝐚𝐝𝐞𝐫𝐬𝐡𝐢𝐩 𝐚𝐧𝐝 𝐓𝐞𝐚𝐦 𝐁𝐮𝐢𝐥𝐝𝐢𝐧𝐠: Built and managed high-performing, cross-functional teams across multiple industries and geographies. ⭐ 𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐒𝐭𝐫𝐚𝐭𝐞𝐠𝐲: Translated business objectives into actionable technical strategies, ensuring smooth product launches and growth. ⭐ 𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲: From ideation through MVP and full-scale product launches, I streamline your software development lifecycle (SDLC) for efficient, high-quality delivery. ⭐ 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 𝐚𝐧𝐝 𝐑𝐢𝐬𝐤 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: Navigated complex regulatory software requirements (ISO, EU MDR, FDA) in critical industries such as healthcare, ensuring top-tier product integrity and security. I have a proven track record in guiding executives and founders through complex decisions, delivering outcomes that not only save time and money but position your business for long-term success. Whether managing EUR 30M+ initiatives in healthcare or reducing SaaS operating costs by 50%, my focus is always on delivering value and scaling sustainably. 𝐒𝐨𝐦𝐞 𝐡𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬: 👉 Overseeing a 40-person team to deliver lifesaving software while achieving Class IIb compliance with rigorous global standards. 👉 Built an in-house development team from scratch, cutting costs by 50% and improving uptime to 99.98% for a SaaS platform supporting millions of users. 👉 Mentored senior engineers into leadership roles, preparing them to scale their organizations while maintaining delivery excellence. 🚀 𝑳𝒆𝒕'𝒔 𝒘𝒐𝒓𝒌 𝒕𝒐𝒈𝒆𝒕𝒉𝒆𝒓 𝒕𝒐 𝒔𝒄𝒂𝒍𝒆 𝒚𝒐𝒖𝒓 𝒃𝒖𝒔𝒊𝒏𝒆𝒔𝒔, 𝒐𝒑𝒕𝒊𝒎𝒊𝒛𝒆 𝒚𝒐𝒖𝒓 𝒕𝒆𝒂𝒎𝒔, 𝒂𝒏𝒅 𝒕𝒖𝒓𝒏 𝒚𝒐𝒖𝒓 𝒕𝒆𝒄𝒉𝒏𝒊𝒄𝒂𝒍 𝒄𝒉𝒂𝒍𝒍𝒆𝒏𝒈𝒆𝒔 𝒊𝒏𝒕𝒐 𝒄𝒐𝒎𝒑𝒆𝒕𝒊𝒕𝒊𝒗𝒆 𝒂𝒅𝒗𝒂𝒏𝒕𝒂𝒈𝒆𝒔.
    Featured Skill React.js
    LLM Prompt Engineering
    OpenAI API
    Team Management
    Product Design
    Agile Software Development
    Project Management
    React Native
    Product Backlog
    Agile Project Management
    User Experience Strategy
    Product Roadmap
    Software Architecture & Design
    Next.js
    React
    Product Management
  • $35 hourly

    • 5.0/5
    • (28 jobs)
    Over the last 10 years, I have developed websites using C#/.NET, ASP.NET, ASP.NET MVC, MySQL, MS SQL PostgreSQL, ReactJs. My core competency lies in helping make reliable and future-proof applications. Skills Front-end: * JavaScript - 10 years * ReactJS - 6 year * HTML - 10 years * CSS3 - 10 years Back-end: * C# - 10 years * .NET Framework - 10 years * .NET Core - 7 year * WPF - 2 years * Entity Framework - 7 years Databases: * MS SQL - 10 years * MySQL - 4 years * PostgreSQL - 1 year * Redis - 4 years * MongoDB - 1 year
    Featured Skill React.js
    API Development
    Microsoft Azure
    Android App Development
    React
    Microsoft Windows PowerShell
    Docker
    ASP.NET Core
    ASP.NET
    CSS
    SQL
    C#
    HTML5
    JavaScript
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