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React Developer | Full Stack Developer - 100+ shipped projects taught me one thing: clients don’t need more code, they need products that load fast, scale safely and make money 👋 Hey, there! My expertise centers around elevating companies and startups with robust, scalable web solutions, leveraging advanced front-end technologies like React and Next.js. Our engineering team is hungry 🍽 to solve your needs through in-time delivery of high-impact tech solutions - whether you need a custom platform ⚙, a revamped UI 🛡, or a powerful enterprise application. React & Full Stack Track Record 10+ Years of Experience as a React Developer & Full Stack Developer |100+ Delivered Projects | 30+ Enterprise Platforms | 20+ High-Load Applications | 25+ eCommerce Solutions Trusted by Founders & Teams ⭐ “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[dot]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). As a react developer ( full stack developer ) working alongside roles like project and delivery manager, web developer, wordpress developer, and full stack developer react specialist, I collaborate closely with stakeholders to bring ideas to life. My portfolio includes enterprise platforms, custom web design solutions, scalable full stack web developer applications, and mobile products where I act as a mobile app developer and react native developer delivering iOS and Android apps. I also contribute as a python developer, working with python, fastapi, and backend services, while supporting integrations through stripe and scalable architectures. My experience spans wordpress ecosystems, laravel vue projects, and solutions using ruby on rails, ensuring flexibility across different business needs. Why choose me: ✅ Top Rated on upwork as a React Developer & Full stack developer, delivering high-caliber code alongside strong business expertise. ✅ Proactive, delivery-focused - honoring tight schedules while optimizing for maximum ROI. ✅ Flexible - I collaborate across full stack, web development, website design, ui/ux design, and game developer projects. ✅ Time & Material basis - pay only for productive hours. My strong side as a Full Stack Developer React UI developer 🔥 Front-end: javascript, React, react typescript, angular, vue, redux, zustand, mobx, graphql, html5, css3, material ui, and tailwind css. 🔥 Back-end: node.js, next.js, nest.js, express, fastify, php, laravel vue, ruby on rails, python, and fastapi. 🔥 Databases: postgres, mysql, redis, mongodb. 🔥 Cloud: firebase, docker, aws, and supabase. 🔥 Enterprise: c# azure function app services for scalable backend processing. With 10+ years of experience, my expertise centers around elevating companies and startups with robust, scalable web development solutions, leveraging advanced technologies - React, React TypeScript, Next.js React, and Vue - alongside strong coding practices in JavaScript, PHP, and Python. I also work confidently across React python projects where modern frontend interfaces need to connect with scalable Python-based backends. As a Cursor developer ( full stack cursor, supabase cursor ) specializing in Veeva solutions for museums and art curators, I help bring art and cultural heritage to life through technology. From designing custom apps and digital catalogs to optimizing workflows and preserving collections, I enable art institutions to connect with their audiences in a more interactive, insightful, and efficient way. 🤝 Let's collaborate! Contact me for a project audit, technical consultation, or to develop a roadmap for your project - whether you need a custom platform, sophisticated enterprise application, or a well-designed website. Looking forward to a long-term, win-win partnership. Cheers from Vilnius, Raman

👋 Hi, I am an Oracle Certified full-stack Java developer with 10+ years of experience in software development. 🚀 What I Offer: ✔️ Expert in Java and full-stack development, from backend to frontend ✔️ High-quality, scalable, and maintainable code ✔️ Great communication, proactiveness, and attention to detail ✔️ Ability to work independently or as part of a team 💡 Need help with a Java-related project? Let’s build something amazing together! Tech Stack: 💻 Programming Languages: Java | TypeScript | JavaScript 🖥️ Frontend: Angular | Jasmine | Playwright ⚙️ Backend: Spring Boot | Spring Framework (Spring MVC, Spring Security, Spring Data etc.) | Java EE (JSP, JSF, EJB, JPA) | Hibernate | JUnit | Spock Framework | Testcontainers | Mockito 🖥️ Desktop Applications: JavaFX 🗄️ Databases: MongoDB | PostgreSQL | Oracle Database | MSSQL | MySQL 🚀 DevOps & CI/CD: Docker | Docker Compose | Kubernetes | Jenkins | SonarQube 📡 Protocols & APIs: HTTP, HTTPS, SFTP, SSH | REST, SOAP | AMQP 🛠️ Build Tools: Maven | Gradle | Ant 📩 Let's connect! I’d love to discuss how I can contribute to your project.

Experienced software engineer (development of web-services) Specialties: Python, Django, Asyncio, Postgres, RabbitMQ, Docker, OpenAPI/Arazzo Significant experience in creating microservices within highload projects, API design. Their maintenance, monitoring, deployment. Develop and implement robotic systems for end-to-end test generation that collect domain knowledge for LLM integration and validate high-level compliance. Additional experience: frontend development (html, javascript, Vue.js), AI/ML/CV (TensorFlow, Keras)

Main skills: Frontend: HTML/CSS(SCSS)/js(jquery/Vue/React(next)) Backend PHP: PHP/PHP(Wp+Wooccommerce) Backend Python: Python/Python(Django, Flask, FastAPI) DevOps: Ansible, Kubernetes, Terraform, Google Cloud Platform, GitLab, VictoriaMetrics, Grafana, Prometheus, CI/CD Design: UI/UX, Figma, Photoshop Other skills: AI frameworks: Tensorflow, PyTorch, Keras Development of bots for Telegram, Viber, WhatsApp, Instagram Parsers: Selenium, Scrapy, bs4 Message Brokers: RabbitMQ, Kafka R: RStudio, Shiny, dplyr, httr, RCurl, DT, cronR, Sockets, leaflet etc Operating Systems: Linux(Ubuntu), Windows DBMS: MySQL, PostgreSQL, MongoDB, Redis Tools: Celery, RabbitMQ, Docker, Jira, OpenCV, Numpy, Matplotlib, Scipy, Pandas, Apache Spark, SciPy, Subprocess, Websockets, aiohttp, asyncio, REST API, SOAP, Docker, GIT, SVN Industry Knowledge: Math, Statistics, Probability theory, Decision Theory

"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!