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Hire the best Node.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 Node.js
    Shopify
    Shopify Apps
    Shopify Theme
    Ecommerce
    Web Design
    Shopify Plus
    Web Accessibility
    CSS 3
    HTML5
    React
    JavaScript
    Platform Plugin
    MySQL
  • $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 Node.js
    SCSS
    PSD to HTML
    CSS
    Bootstrap
    JavaScript
    HTML
    Web Development
    Graphic Design
    Tailwind CSS
    React
    Next.js
    Responsive Design
    Web Design
    Figma
  • $50 hourly

    • 5.0/5
    • (19 jobs)
    I'm your guy if reliablity and self-autonomy is what you're looking for. - 4+ years work experience working on production level applications of Python. - Native English speaker. - An expert in bridging the dynamic gaps in the automation of tasks through LLM integration. Some of my achievements: - Created the back-end in Node.js of a country-level system that utilizes SMS to communicate to the front-end (the project won awards from the IMF & Bill and Melinda Gates Foundation) - Created a custom CRM for a U.N. Programme (Soil Doctors) using Sequalize as the ORM for data-modelling and interactions, React and Redux toolkit for frontend, Node.js and Express for backend - Built ETL pipelines for companies in the healthcare industry that have been sold over $100K - Created large-scale dynamic scraping solutions for large platforms (eg. Reddit, X, Yahoo) (with respect to their ToS) - Wrote and implemented a threshhold-detection algorithm that utilizes and automates MightyZap's actuators to detect significant threshholds of different pipettes Here is a condensed run-through of my experiences in various stacks: Specalized in Node.js, Flask, FastAPI, RESTful and GraphQL APIs, Selenium, Playwright, RPA. Experienced in ETL, LLM integration, SQL/NoSQL databases, AWS, Azure, GCP, CI/CD, Docker, Kubernetes, ML/AI, Algorithms. Expert in Linux server management, cybersecurity, cloud VPS, Docker, IaC
    Featured Skill Node.js
    English
    Economics
    Managerial Finance
    Corporate Finance
    Political Science
    Business Proposal Writing
    Statistics
    PyTorch
    NumPy
    pandas
    SQL
    ExpressJS
    Selenium
    JavaScript
    Python
    Data Analytics
    Web Scraping
  • $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 Node.js
    Nuxt.js
    Web Development
    Next.js
    React
    Vue.js
    Search Engine Optimization
    TypeScript
    MongoDB
    JavaScript
    WordPress
  • $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 Node.js
    NestJS
    React Native
    Amazon Web Services
    Mobile App
    React
    Google Cloud Platform
    Artificial Intelligence
    Web3
    Blockchain Architecture
    web3.js
    Blockchain Development
    NFT
    Solidity
    Ethereum
  • $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 Node.js
    Laravel
    Front-End Development
    React
    Gatsby.js
    NestJS
    Vue.js
    ExpressJS
    Web Application
    Website Optimization
    Nuxt.js
    Next.js
    TypeScript
    JavaScript
    PHP
  • $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 Node.js
    Klaviyo
    GitLab
    AWS Lambda
    REST API
    Vercel
    Firebase
    Socket.io
    Sanity Testing
    Git
    PostgreSQL
    TypeScript
    NestJS
    Next.js
    React
  • $50 hourly

    • 4.7/5
    • (35 jobs)
    ❇️ Streamline your business processes by unifying all company data in a comprehensive, all-in-one business data management system ✳️ Set up a cost-effective custom ERP/CRM system, tailored exactly for your company 🤖 Automate you workflows to reduce labor costs and eliminate human errors ♻️ Replace tedious manual work with direct API integrations to other services ✈️ Migrate your data from fragmented sources (spreadsheets, CRMs, etc) securely and with ease 🚀 Enhance your business operations with innovative AI integration 🛠️ MY SKILLS & TOOLS: ‣ Airtable — expert — bases, automations, scripts, interfaces, custom extensions ‣ API integration — expert — OpenAI/ChatGPT, Telegram, Dropbox, Amazon Seller, Twitter, Google Cloud, Thrivecart, Squarespace, Shopify, Spotify, Typeform and more ‣ Automations — expert — Make.com ‣ Back-end — advanced — Javascript, Typescript, NestJS, MongoDB, Amazon EC2, Ubuntu I'm dedicated to sorting things out, organizing messy data and ensuring that business processes run smoothly and efficiently. Always looking for smart ways to solve problems and eager to learn new skills. Feel free to request an interview for a complimentary consultation regarding your project.
    Featured Skill Node.js
    NestJS Development
    JavaScript
    Make.com
    Telegram API
    Dropbox API
    Amazon Seller Central
    Automation
    CRM Development
    ERP Software
    Airtable
    TypeScript
    OpenAI API
    Back-End Development
    API Integration
  • $40 hourly

    • 5.0/5
    • (7 jobs)
    MIMINUM ENGAGEMENT - 1 Month MINIMUM BUDGET - $5000 Only serious projects with established companies & startups 🌟 10 years of proven mobile app expertise 🌟 As a skilled Swift Developer, I specialize in iOS development, creating innovative and high-performance iOS apps. With a strong foundation in Swift, SwiftUI, UIKit, and Objective-C, I build visually stunning and user-friendly interfaces. 🌟 I don't sell hours - I guarantee results 🌟 Successful apps released to AppStore and Google Play I'm a passionate full-stack mobile app developer with over 8 years of experience crafting high-performance iOS and Android applications. My expertise spans Swift, Objective-C, Kotlin, Flutter, and React Native, allowing me to build native and cross-platform apps that power millions of devices worldwide. Having developed and optimized 50+ mobile applications, I specialize in delivering seamless user experiences with a focus on speed, security, and scalability. My knowledge of Kotlin Multiplatform enables me to create codebases that reduce development time by 40%, ensuring efficient cross-platform solutions for businesses of all sizes. I have extensive experience in iOS development, working with Swift, Objective-C, SwiftUI, UIKit, and Apple Xcode to create smooth and high-performance applications. At the same time, I leverage Kotlin and Java for Android app development, building native apps that run seamlessly across a wide range of devices. My expertise extends to React Native and Flutter, which I use to develop cross-platform mobile applications with unified performance, accumulating over 500K+ downloads. On the backend, I work with Node.js and JavaScript, developing scalable APIs and cloud-powered services that integrate effortlessly with mobile apps. Beyond development, I focus on mobile UI/UX design, ensuring applications are intuitive, visually appealing, and user-centric. My deep knowledge of Material Design, widget customization, and app lifecycle management has helped improve user engagement by 60%, delivering experiences that feel smooth and natural. I have implemented Google Maps and MapBox integrations, powering advanced geolocation features for applications used by millions of users. In the e-commerce and subscription space, I integrate payment gateways, in-app purchases, and monetization strategies, driving over $1M in transactions across various platforms. Leveraging Firebase and AWS, I build scalable, real-time mobile applications with 99.9% uptime, ensuring secure cloud synchronization, push notifications, and real-time database management. Whether developing AI-powered solutions, IoT-driven applications, or enterprise-scale platforms, my approach always prioritizes performance, maintainability, and user satisfaction. My mobile-first mindset ensures that every app I develop delivers peak performance across iOS, Android, and the web, helping businesses scale with confidence.
    Featured Skill Node.js
    PHP
    Android
    React Native
    Kotlin
    JavaScript
    Java
    Apple Xcode
    Android App Development
    Firebase
    Mobile App Development
    Objective-C
    iOS Development
    iOS
    Swift
  • $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 Node.js
    Agent GPT
    GPT API
    Python
    React
    Cloud Application
    Cloud Architecture
    Prompt Engineering
    Full-Stack Development
    Amazon Web Services
    AI Implementation
  • $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 Node.js
    Vercel
    Python
    Back-End Development
    Full-Stack Development
    Database
    React Native
    User Experience Design
    Data Visualization
    Amazon Web Services
    Front-End Development
    TypeScript
    JavaScript
    Next.js
    React
  • $60 hourly

    • 4.9/5
    • (26 jobs)
    Senior Data Engineer / PHP developer with 10 years experience. Key focus on PHP framework Yii2. Databases: MySQL (10+ years), MongoDB (6 years) Linux: (10+ years). Founder of hosting provider lemehost.com. Tuning Linux servers (kernel) parameters. Linux tools: ethtool, dig, sysstat, net-tools, dns-util, iotop, iftop, htop, tcpdump, ncdu, iptables, sysctl, certbot and many more Networking: (D)DoS mitigation. In depth knowledge of network protocols. Would you like to hear a UDP joke? Web Server: apache, nginx Virtualization, hosting: docker, proxmox, openvz, multicraft, pterodactyl Server monitoring: netdata Websockets: ratchet Payment integration: paypal, payabl, stripe, paymentwall, paysera, coingate, coinpayments, fortumo(boku), utrust AI: rubixml Testing: codeception, selenium Deploying: deployer Frontend: bootstrap, jQuery, PWA Mail: sendgrid, swiftmailer Regex: can read and write regex without any help Services: pubnub, slack, branch.io, cloudflare, adsense, google API’s (map, ads), firebase, AWS Telephony: asterisk, smartMEX, GoIP Android: end-to-end experience writing and maintaining one application Version control: github, gitlab IDE: phpstorm Node.js Arduino
    Featured Skill Node.js
    JavaScript
    PHP
    jQuery
    AngularJS
    AJAX
    MySQL
    Yii
    HTML5
    MongoDB
  • $68 hourly

    • 5.0/5
    • (22 jobs)
    *Core value* My goal is to bring you business value through tech execution and insights. *Start of the journey* To bring you most value, I need to understand what your context is. It starts from talking about struggles which needs to be resolved. Could be anything from just code not working to broad technical process issues. I did build & lead dev teams (nexjts, reacjts, nodejs, devops, kubernetes), technical design, tech processes, execution, full business solution. Let's have a 15min call and you will immediately feel if we stick together. While writing me message, please add context. Your company website, key linkedin profiles, short description of business goal and especially - core challenge you feel needs to be resolved in the nearest feature. *Execution* Execution is everything. Once context is understood, we slice process to smaller steps and execute step by step. Either by priority-list or sprints. --- *My experience* On Upwork I was mostly active during ±2016-2019, i was rated as top talent here and as top 3% global talent at toptal.com. From 2019 I joined couple months old company as CTO. Bootstrapped it to $20M evaluation, yet it eventually came to the end post covid and war in Ukraine. I focus on building saas. All with TypeScript. Multiple times i built dev teams from ground up, designed full technical solutions - from database patterns to code patterns and documentation for backend, UI and devops. During 2 decades of navigating tech i developed unique, efficient ways to develop high-quality full-stack saas. *Technical stack* I worked with most of the things what builds 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: - Exploring CrewAI, langchain, ai agents. - Fullstack TypeScript - Backend, Frontend. Python for AI. - Proper TDD: tests first, code next. Especially for backend. CI/CD with high focus on having app always in deliverable state. - UI: NextJS, ReactJs, Tailwind CSS or UI libs like mui.com, Electron, ReactJS Native. React-query. - 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. - Backend: favor for traditional RESTfull designs, by need - websockets. For queues - bullmq with Redis/SQS. - Databases: Primary database usually MongoDb. For situations - SQL, 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 ±10years ago and "cloud" was not yet around like today. Was managing my servers by hand. Usually rent some VPS and set it up, in some cases built my server. 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 ±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) ✅ Biggest project by money volume ±$1.4B/yr in transactions (I was tech lead for 2 teams - devops and integrations) 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, RESTfull, 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 worldwide 🌟
    Featured Skill Node.js
    Twitter/X Bootstrap
    Socket Programming
    PHP
    React
    CSS 3
    HTML5
    React Native
    JavaScript
  • $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 Node.js
    styled-components
    React Native
    Mapbox
    Firebase
    Swift
    API Development
    CSS 3
    React
    Next.js
    JavaScript
    Three.js
    HTML5
    Python
    Google Cloud Platform
  • $100 hourly

    • 5.0/5
    • (9 jobs)
    "Zilvinas is very professional. It was easy to work and communicate with him. He finished the project on time and delivered more than I have expected." As a Full-stack Software Engineer and System architect with over 15 years of experience, I have developed complex solutions for Banks, Power Plants, Utilities, Governments, and Startups, including Fortune 500 companies such as NEC Corporation and Rolls-Royce. I bring a wealth of expertise to every project I work on. My specialty lies in building complex full-stack solutions, starting from system architecture, continuing to database design, business logic, and all the way to the frontend. Throughout the process, I ensure optimization, performance tuning, and seamless integration of third-party systems to deliver exceptional software development solutions for my clients. Here are the services I offer: ✅ Software Architecture and Design ✅ Backend (server-side) development (.NET, NodeJS, NestJS) ✅ IoT systems development (AWS IoT, Azure IoT Hub, Custom solutions) ✅ iOS and Android development (Swift, Kotlin) ✅ Agile Software Project Management ✅ Tech Startup Consulting (remote CTO) When you choose to work with me, you can expect: ✅ The delivery of what I promise, and more ✅ My unwavering commitment to your business needs, delivering solutions that are the best fit for your organization ✅ Open communication channels and 24/7 availability Here's what one of my clients had to say about my work: "Zilvinas has profound technical knowledge and organizational skills. He has what it takes to make a wonderful project leader." - Aaron Iva. If you're ready to bring my expertise to your project, here's how we can get started: 1️⃣ Click the green "Invite" button in the upper-right corner of this page to invite me to your job. 2️⃣ I'll jump on Zoom with you to discuss all the details of your project. Let's work together to take your business to the next level. Invite me to your job, and let's get started!
    Featured Skill Node.js
    NestJS
    Scrum
    MQTT
    PostgreSQL
    Firebase
    TypeScript
    MongoDB
    Swift
    Internet of Things
    AWS IoT Core
    .NET Framework
    Project Management
  • $45 hourly

    • 5.0/5
    • (4 jobs)
    I am a generalist Web Developer - I build everything from static homepages, to highly complex dynamic applications. I focus on user experience above everything else, while making sure that my code is scalable, maintainable and easy to understand for other developers. I stay on top of latest best practices, making sure that code I write is up to date to modern standards. My extensive experience in industry, as well as formal education enables me to understand the problem on all levels - from marketing and design to low level programming. I believe I bring great value to any company I work at, by having good foundational knowledge of modern computer software. My specialisation includes, but not limited to: Next.js, TypeScript, React, Tailwind CSS, PostgreSQL, MySQL, MongoDB, Prisma, Kysely, T3 Stack, TRPC, GraphQL, REST, OpenAPI, Schema.org, Remix, Astro, Svelte, HTML, CSS, JS, Git, Vercel, Web Vitals, SEO, + any CMS there is (I even built my own CMS too).
    Featured Skill Node.js
    Svelte
    Firebase
    GraphQL
    React
    Three.js
    ExpressJS
    SQL
    Redux
    PostgreSQL
    MongoDB
    Next.js
    JavaScript
    webpack
    TypeScript
  • $70 hourly

    • 0.0/5
    • (1 job)
    Fullstack software engineer. For the past 10 years I have been developing distributed SaaS web applications and managing high performing technical teams.
    Featured Skill Node.js
    Product Management
    Project Management
    SciPy
    Laravel
    TensorFlow
    Python
    JavaScript
    React
    PHP
  • $100 hourly

    • 0.0/5
    • (0 jobs)
    Senior Full Stack Developer with over 6 years of experience delivering web applications, prototypes, and proof-ofconcept (PoC) solutions. Adept at React, TypeScript, Next.js, and other modern front-end technologies. Demonstrated success in rapid prototyping, iterative development, and collaborating with cross-functional teams. Proven track record in remote contract positions, driving innovation in startup, agency, and enterprise environments.
    Featured Skill Node.js
    Jest
    Firebase
    Apollo.io
    Next.js
    MongoDB
    Gatsby.js
    JavaScript
    GraphQL
    React
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    I am full stack web developer, currently working with fin-tech / ERP/ self care systems using .NET/Node.js and React.js/Next.js Through out the years I had tasks to work with many various APIs and had to integrate them to developing system. Designing and implementation of the front-end layer using React.js/Next.js, which communicated with the mentioned REST API. Now I am working with a clients self-care system for telecommunication company with 450k+ unique active monthly users Also I am capable to create business page, portfolio or even Eshop by using Wordpress/ WooCommerce. As well as mobile applications I am able to work with a team or independently. I can work for up to 20-25 hours per week. Technologies I'm working with - Client-side: React.js, Next.js CSS3, HTML5 - Server-side: Node.JS (Express), C# .NET Core - Mobile apps development: Ionic, React Native - Database: MySql, MongoDB - Wordpress, WooCommecre
    Featured Skill Node.js
    Ionic Framework
    .NET Core
    MongoDB
    WordPress
    JavaScript
    C#
    React
    Angular
    MySQL
  • $75 hourly

    • 0.0/5
    • (0 jobs)
    🚀 Looking to build a new web app, SaaS platform, or AI-powered solution? I specialize in crafting high-performance, scalable, and modern applications that drive business growth from day one. ✅ What I Build: 🔹 Custom SaaS Platforms – End-to-end development, from MVP to enterprise scale 🔹 AI & Automation Apps – AI-powered tools, process automation, and smart integrations 🔹 API Development & Integrations – Secure, scalable APIs that connect and automate workflows 🏆 Why Work With Me? ✅ Full-Stack Expertise: React, Next.js, Node.js, TypeScript, Python, AWS, Firebase ✅ End-to-End Execution: From idea validation to launch-ready product ✅ Scalable & Secure Architecture: Future-proof development for long-term growth ✅ Clear Communication & On-Time Delivery: Fast, reliable, and results-driven
    Featured Skill Node.js
    React
    Golang
    PHP
    Next.js
    AI Implementation
    SaaS Development
    AI Development
    Front-End Development
    Engineering & Architecture
    JavaScript
    Database Design
    Back-End Development
    Full-Stack Development
    Microservice
  • $35 hourly

    • 0.0/5
    • (1 job)
    Hey there! I'm a full-stack engineer with an unconventional path. My journey began in engineering, ventured into social media marketing, and even took a detour through e-commerce. This eclectic mix of experiences has been invaluable in crafting web apps and systems that are not only innovative but also intuitive and secure. Regarding my tech journey, I spent a significant time up until 2021 deeply engaged with PHP, navigating through versions 7.2 to 7.4 and becoming best friends with frameworks like Symfony, Laravel, and CodeIgniter. Embracing change, I shifted my focus towards JavaScript, TypeScript, Vue.js, and Ruby on Rails, and I couldn't be happier with this decision! I've also worn various hats, from QA automation engineer to leading projects and tech teams. But, what truly ignites my passion is coding. There's immense satisfaction in solving problems, whether they're straightforward or complex, with my programming expertise. It just feels right. In essence, I've traversed many paths, accumulated a wealth of skills, and I'm eagerly anticipating what's next on this tech journey!
    Featured Skill Node.js
    YARN
    Tailwind UI
    MVC Framework
    Ruby on Rails
    Ruby
    npm
    Tailwind CSS
    CSS
    HTML
    TypeScript
    JavaScript
    Vue.js
  • $15 hourly

    • 5.0/5
    • (1 job)
    I am a mid-level full-stack developer. I develop applications of varying complexity, their backend and frontend. I can develop projects from scratch and work on their support. I have 2 years of experience with different technologies like Nodejs, React Native, Typescript and others. I know how to work with Nginx and Certbot which allows to set up servers. I write clean and tidy code. I develop and support learning, which allows me to learn new technologies and improve existing skills.
    Featured Skill Node.js
    SSH
    Postman
    Unit Testing
    React Native
    Payment Gateway Integration
    Full-Stack Development
    API Integration
    jQuery
    Underscore.js
    NGINX
    Git
    TypeScript
    MySQL
    MongoDB
  • $30 hourly

    • 4.9/5
    • (17 jobs)
    I am an Online Payment & Fraud, Chargeback and Risk expert of all fields - E-Commerce, P2P, ACH etc. I know every payment process step and feature from the moment of customer entering a website until checkout and post that! I specialize in Fraud and Chargeback Prevention, Data Analysis, Data Visualization, Reporting, Data Synthezation/Simulation. Expert in dealing with Stripe, Braintree and other processor payments & chargebacks. Having experience in leading development teams to produce different products, I can also assist as a Product Manager / Product Owner. If you need anything done related to online payments, fraud & chargebacks - contact me!
    Featured Skill Node.js
    Business Analysis
    ExpressJS
    Cybersecurity Management
    Fraud Detection
    Stripe
    Project Risk Management
    Fraud Mitigation
    React
    Data Analysis
  • $30 hourly

    • 5.0/5
    • (8 jobs)
    Web Developer that loves what he does. I have a bachelor's degree in Engineering. Currently teaching classrooms of students of full stack Javascript course. I take my work very seriously. I am giving you a 100% guarantee that everything I Build will work as intended, and will look great on mobile, tablet, or desktop. The whole process of developing fascinates me and I really enjoy doing it. I have 4 years of experience in web development. I am comfortable working with general HTML, CSS, and Javascript as well as modern frameworks like Reactjs and Next.js. Back end with Node, Express.js, MongoDB and SQL databases. I hope to have many win-win contracts here and everywhere.
    Featured Skill Node.js
    PHP
    Next.js
    ExpressJS
    React
    Nuxt.js
    Vue.js
    JavaScript
    HTML5
    CSS 3
    Bootstrap
    WordPress
    jQuery
  • $3 hourly

    • 5.0/5
    • (1 job)
    Hi! I am a highly motivated programmer and I am especially excited in creating dynamic and user-friendly web applications that meet the needs of my clients. My top skills: HTML/CSS, JavaScript and TypeScript, and of course Node.js and React.js.
    Featured Skill Node.js
    CSS
    HTML
    React
    TypeScript
    JavaScript
  • $40 hourly

    • 5.0/5
    • (8 jobs)
    Web developer with almost 8 years of experience, specializing in NodeJS and Python. Familiar with modern software development practices. Result oriented. Good knowledge of cybersecurity. Core skills: NodeJS React Framework Docker Kubernetes ChatGPT MongoDB Google Cloud Secure coding Next.js GraphQL Electron apps Microservices API development Figma Website performance SEO Web scraping, scripting and automation Python PHP (ProcessWire) Throughout my career, I have worked with a diverse range of industries, including marketing and communications, entertainment, e-commerce, human resources, animal services, and real estate. My portfolio includes building blogs, landing pages, plugins, platforms, calendars, and product catalogs. I strive to deliver projects as efficiently as possible while continuously building upon existing features. My approach involves doing everything on time. Justinas
    Featured Skill Node.js
    API Development
    SCSS
    React
    MongoDB
    Responsive Design
    PHP
    Website
    Next.js
    Web Development
    HTML5
    JavaScript
    ProcessWire
    CMS Development
    RESTful API
  • $70 hourly

    • 4.4/5
    • (25 jobs)
    Note: I do not take more than 2 jobs at once! Priorities: - Delivery on time; - Quality code displaying the best industry practices; - Intelligent approaches; I value: - Clear deadlines; - Specific requirements; - Freedom of implementation; CV - 5 years of experience in: - Frontend: Vue3 (Vite), Angular, Blazor. - Data visualization: d3js, threejs. - Backend: C# with ASP.NET core, dotnet ecosystem, php with Laravel (with Symphony tooling) - Data scraping and browser automation: nodejs, puppeteer, playwright, Apify SDK; Python with scrapy. If you want to view my past projects, please mention that in a private message.
    Featured Skill Node.js
    Automation
    PHP
    Lead Generation
    Vue.js
    Data Extraction
    Data Mining
    Data Scraping
    Web Crawling
    Scripting
    Microsoft Excel
    Python
    JavaScript
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