Hire Vetted Web Application Engineers at Upstaff - Page 6

- 10+ years of experience in the IT industry as a Ruby on Rails Engineer - Demonstrated expertise in full-stack development, contributing to projects across the entire software development lifecycle, from planning and architecture to implementation and optimization. - 5+ years of experience as a DevOps engineer: Preparing AWS /Hetzner environment for application clusters, Creation scripts to automate application cluster infrastructure, Creation/configuration via Terraform, Dockerizing applications - 1 year of experience as a Team Lead: mentoring, training, coordination of jun devs and co-workers, Handling client requirements, Resolving problems and issues on the project

- Senior Full-Stack Developer with 12+ years of experience in software engineering; - Certified in .NET Microservices, Scrum Master, and Python Programming; - Skilled in building scalable web applications using .NET (Core, 6–9), C#, and ASP.NET; - Strong experience in microservices architecture, CQRS pattern, and RESTful API design; - Familiar with Vertical Slice architecture and Domain-Driven Design principles; - Proficient in front-end development with Vue.js, Angular, Kendo UI, and SASS; - Experience with modular frontend architecture using single-spa; - Hands-on experience with Microsoft Azure (App Service, Container Registry, Azure SQL); - Implemented CI/CD pipelines using Azure DevOps, Azure Pipelines, Git, and Kubernetes; - Worked with SQL Server, NoSQL databases, SignalR, WireMock.NET; - Familiar with Node.js and PHP for backend tasks and system integration.

Seasoned Front-end Engineer with over 6 years of experience and proficiency in cutting-edge technologies such as React, Redux, and Next.js. Specializes in React with TypeScript for building robust and maintainable applications.Skilled in engineering dynamic user interfaces, achieving significant performance optimizations and codebase enhancements. Pioneered comprehensive testing strategies to ensure high-quality software and maintain reliability across deployments.Demonstrates proven expertise in responsive design and cloud-based solutions, with recent mastery in Next.js 15 Server Components. Experienced in collaborating on international remote projects, consistently contributing to improved user engagement and overall software performance.Holds key certifications, including Next.js 15 & React and AWS Cloud Practitioner, reflecting a commitment to continuous learning and professional growth.Combines strong technical acumen with essential soft skills such as problem-solving, communication, and teamwork—making this engineer an excellent candidate for advanced Front-end roles.

- Experienced in React Native: Developed and delivered multiple React Native mobile applications, including a KenZen App and a Furniture Design Time-Tracking App, integrating Firebase, Redux, animations, and state management. Over 4.5 years of experience with React Native - Full-Stack Development in Fintech: Led fintech real estate app development, handling both front-end (ReactJS, Styled-Components) and back-end (NodeJS, MongoDB) while managing CI/CD pipelines and real-time updates. - Senior Developer in Web & Mobile Apps: Designed and implemented scalable mobile and web applications, ensuring high code quality, debugging, and managing releases on App Store and Play Market. - Developed e-commerce web solutions using Vue and Vuex, collaborating with back-end and QA teams, - Experienced in Docker, GitHub Actions, and Linux server management, optimizing deployment pipelines and application performance. - Intermediate English

Passionate Senior Software Engineer with 7 years of experience excels in building complex web applications leveraging mastery in languages such as JavaScript, TypeScript, C#, Go, and Python. Renowned for architecting a legal SaaS platform yielding a 40% operational efficiency boost and pioneering AI-powered chatbot integration, showcasing a 30% reduction in case handling efforts. Adept in cloud services (AWS, Azure, GCP), microservices, and CI/CD with an Agile mindset, drives collaboration and continuous improvement. Holds a solid foundation with a Bachelor's degree in Computer Science from NTUA, cementing technical prowess in the software industry through contributions to large-scale projects that enhance user experiences, performance, and reliability.

- Full-Stack Developer with 4+ years of experience in software engineering; - Skilled in building responsive UI using React, Next.js, TypeScript, Tailwind, and MUI; - Strong experience in Java and Spring Boot for back-end development; - Proficient in API development, integration, and optimization for performance; - Experienced with PostgreSQL, MySQL, and Oracle for database management; - Familiar with Node.js for scripting and backend tasks; - Hands-on experience with unit and integration testing using Jest, React Testing Library, and JUnit; - Solid understanding of SDLC, CI/CD, and application deployment processes.

- 5+ years of experience in IT - Upper-Intermediate English - Available ASAP

- 5+ years of commercial experience in IT - Experience in developing web applications using JavaScript (React, Redux) - Deep knowledge of HTML, CSS, TypeScript - New functionality development - Communicative, responsible, hardworking, result-oriented - Experience from simple sites to huge projects for companies - Good attention to details - Good logical thinking and team play - Intermediate+ English. - Availability starting from ASAP.

- Front-end developer with the overall experience in web engineering for over 3 years. - Intermediate English. - Available ASAP.

- Versatile React Native Developer with 5+ years of experience in delivering robust mobile applications, with a deep understanding of the React ecosystem and modern front-end development. - Holds a solid foundation in software engineering with a Bachelor's degree in Economics, specializing in Accounting and Audit, adding a strong analytical dimension to programming skills. - Proficient in an array of technologies including JavaScript, TypeScript, ReactJS, Redux, Expo, NodeJS with Express, and associated libraries and tools. - Demonstrated expertise in the full software development lifecycle (SDLC), object-oriented programming (OOP), Model-View-Controller (MVC) pattern, Test-Driven Development (TDD), and Behavior-Driven Development (BDD). - Adept in integrating payment solutions such as Stripe, engaging with APIs, and developing cross-platform applications that enhance user experience. Familiar with web development technologies like HTML5, CSS, and cloud services. - Contributed to diverse projects ranging from live nature cams, NFT galleries, healthcare, e-commerce, to social media marketing, demonstrating versatility and the ability to adapt to varied domains. - Team player with intermediate English communication skills, facilitating collaboration with global teams and ensuring alignment with project goals.

- React.js and React Native Expertise: Over 5 years of dedicated experience, showcasing proficiency in building mobile applications and admin panels. - Proficient in TypeScript: Demonstrated use of TypeScript across multiple projects, enhancing application scalability and maintainability. - Redux and Mobx for State Management: Extensive application of Redux and Mobx in project development, ensuring efficient state handling. - Diverse UI Frameworks Knowledge: Employed Material UI, Ant Design UI, and react-native-paper, reflecting versatility in user interface design. - GraphQL and REST APIs Integration: Integrated GraphQL and RESTful services for optimal data retrieval and management in applications. - Solid JavaScript ES6/ES7 Skills: Consistent use of modern JavaScript standards in development projects, forming the basis of his React Native work. - Experienced in Redux-saga and Redux-thunk: Utilized Redux-saga and Redux-thunk for managing complex asynchronous operations in various applications. - Upper-Intermediate English -Available ASAP

- 7+ years IT professional in front-end web development in the field of web-oriented applications for startups, midsize businesses, and large enterprises from various industries. - Expert in React. - Follow React updates. - Good knowledge of TypeScript and JavaScript. Have fully and deep understanding of UX/UI design implementation into HTML layout. - Experienced in different approaches, front-end engineering principles, and concepts. - Knowledge in functional programing, service-based fronted development, OOP based on prototypes, Unit testing (TDD). - Upper-intermediate English - Available ASAP

- 6+ years of experience in the IT industry - 5+ years of experience with Angular - 2 years working with Angular.JS 1.x - Fluent English - Available ASAP

- 6+ years of experience as a Front-End Engineer, specializing in web application development with Next.js, TypeScript, and JavaScript; - 3+ years of experience with React; - 2+ years of experience with Angular; - UI/UX: Expertise in building interactive and responsive user interfaces with Tailwind CSS, Material-UI, and Styled Components; - State Management: Proficient in Redux, Zustand, and React Context API; API Integration: Hands-on experience with REST API and GraphQL for data fetching and processing; - Testing: Writing unit and integration tests using Jest and React Testing Library; - Methodologies: Agile, Scrum, code reviews, and CI/CD processes; - Experience working on e-commerce, SaaS, and fintech projects within international teams; - Strong focus on performance optimization, user experience improvements, and close collaboration with backend developers.

Software engineer with 9 years of professional experience specializing in front-end development and React Native. Expert in building robust mobile apps and web applications using technologies such as ReactJS, NextJS, Redux, GraphQL, and Firebase.

- Profound knowledge of HTML5/CSS3 including preprocessors, understanding of responsive web design, and proficiency with nactive JavaScript & Frameworks. - Previously worked for Samsung, Hyundai, Mitsubishi as a technical engineer - Upper- intermediate English - Available ASAP

- He is a full-stack developer with over 8 years of experience, specializing in front-end development. - His expertise spans a wide range of modern technologies, including leading frameworks like React, Vue, and Angular on the front end, and Express, Nest, and Meteor with MongoDB on the backend. - For the past 5 years, his primary focus has been on creating seamless user interfaces using React. He brings extensive experience in implementing data-driven chart dashboards, designing front-end architecture, and actively participating in various product phases as required.

I’m Victor, and I am a front-end web developer with one year experience. I mostly specialize in JavaScript, TypeScript, React.js, Ant Design, HTML, CSS, SCSS, Redux. Knowledge of these technologies allowed me to successfully complete multiple projects. I am friendly, independent, and easily can find common ground with team members, so I have no problem with teamwork. I am an open-minded person, and always ready to learn from more experienced colleagues. If you want a reliable and easy-going team member, then let me help you. Working with me, you will receive an individual approach to your project, attention to detail and daily progress reports.

A highly skilled software engineer with expertise in JavaScript, TypeScript, Node.js, React.js, and a range of databases including SQL (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis). Demonstrates proficiency in HTML, CSS, and responsive design, as well as advanced ORM tools (TypeORM, Prisma) and API development (REST, GraphQL). Adept at state management using Redux, MobX, and has experience with Docker for containerization. Showcases a strong background in computer science, evidenced by work on complex projects such as a global sports streaming platform and an online casino network, revealing a deep understanding of modern web technologies and best practices. Excels in collaborative environments, where they have led teams towards the successful delivery of products meeting stringent performance and reliability standards.

- Experienced Front-End Developer with 4 years of background in front-end development, building scalable, high-performance web applications. - Experienced in React, Angular, and TypeScript state management (Redux Toolkit, RxJS), API integration (GraphQL, REST), and performance optimization for enhanced user experience. - Skilled in designing responsive UIs (Material-UI, SCSS) and implementing secure authentication systems (JWT, role-based access control). - Adept at performance optimization, reusable component development, and real-time data visualization. - Strong collaborative mindset, working closely with UI/UX designers, backend teams, and stakeholders to deliver seamless and efficient front-end solutions.

- Engineer with 3+ years full-stack development expertise specializing in interactive web applications. - Strong proficiency in JavaScript/TypeScript, React/Next.js, Node.js/Express.js, MongoDB, MySQL, AWS S3, and CI/CD with GitHub Actions. - Practical experience with cloud services, responsive design, real-time communication, and AI-powered tools evident from diverse projects. - Degree in Computer Science reflecting solid theoretical underpinnings complemented by an Engineering BTEC. Practical application of knowledge demonstrated in various roles. - Diverse portfolio including AI-powered tools, multimedia processing applications, and e-commerce platforms showcases in-depth understanding of SDLC and modern software practices - Adept in team collaboration, problem-solving, and mentoring, with a keen eye for database optimization and system efficiency.

- I`m a skilled Front-end Developer with 3 years of commercial experience, I delivered a diverse range of successful projects most of them developed from stage planning architecture to production ready. - My biggest achievements include rewriting an old legacy project that was used by hundreds of thousands of users worldwide, into the most modern technology stack available at the time, developing high-performing web applications with intuitive user interfaces, and optimizing website SEO performance to improve Google search ranking. - I possess excellent communication, a keen eye for detail, and a passion for staying up-to-date with emerging technologies in the field. - Upper-Intermediate English

- Developing web applications using JavaScript, React and Flux architecture - Strong experience in development highly loaded systems - Project deployment - Modular, scalable and reusable code - Supervising the subordinates various technologies - Good logical thinking and team player - Analytical thinking - Communicative and team player - Intermediate English - Availability starting from ASAP

- Software Engineer with 5+ years of experience in full-stack software development. - Proficient in JavaScript (Angular, React/Redux, Node.js), TypeScript, React Native/Flutter, Objective-C, Java, WebRTC, HTML5/CSS3, Docker, and AWS. - Skilled in developing project architecture, algorithms, and models based on customer requirements. - Experienced in debugging and maintaining source code using specialized tools. - Strong understanding of all stages of the software development process. - Master's degree in Controlling and Automation Systems from Odessa National Polytechnic University. - Worked on various projects including web and mobile app development, online document processing service, mobile application for football fans, web application for mind mapping, and e-commerce mobile app. - Proficient in technologies such as Angular, TypeScript, Node, Flutter, React.js, MongoDB, XDocReport, Apache PDFBox, JSON, HTML5, XML, CSS, JavaScript (Ext.js/Redux/Redux-Saga, Node.js/Express.js), MongoDB, React Native, Api-Sauce, React-Navigation, Redux, Lodash.js, Firebase Cloud Messaging, Facebook login, AWS RDS (MariaDB), WebRTC, Git, Docker, Jenkins, and Redmine.

Yurii T. is a senior full-stack developer with 8 years of experience in software development and business. He has a strong background in computer science and is proficient in HTML5, CSS3 with SCSS, JavaScript ES6+, and TypeScript. Yurii has expertise in various frameworks and technologies such as Node.js, Koa.js, Nest.js, React.js, Redux-Saga, MongoDB, PostgreSQL, MySQL, Docker, Docker Swarm, Kubernetes, AWS, GCP, Azure, GitLab CI, Jenkins, CIRCLECI, AngularJS, Angular 2+, and Ionic.He has worked on several projects, including Teroxx, where he developed an all-in-one cryptocurrency wallet app with features like registration, secure asset storage, coin-tracking, real-time transfers, and more. Yurii also contributed to the development of an internal cargo management system for an Italian logistic company, a comprehensive platform called Teamplate with chat, board, data room, calendar, and video call functionalities, and a delivery app called Lezzoo for ordering food, pharmacy items, groceries, and taxis.Yurii is experienced in using Apache Kafka, GRPC, Mocha.js, Jest.js, SNYK, Unit Tests, Twitter Bootstrap, Angular Material, React.js Material-UI, React Bootstrap, SASS, SCSS, LESS, Mongoose, Squelize, Typeorm, Gulp, Grunt, Webpack, MySQL, Oracle PLSQL, Redis, Elasticsearch, Memcached, and KSQL.He has also worked on projects like QueenCar, a ride-sharing app, Nimbla, a web app for invoice insurance, Shift, a delivery and transport marketplace, and The Hub, a community platform for creators.Yurii's technical skills, extensive experience, and proficiency in various programming languages, frameworks, and tools make him a standout candidate for software engineering positions. He has a strong understanding of software development methodologies, principles, paradigms, and patterns, and follows industry-standard software development practices.

4 years of experience in development using Javascript, Typescript, React, Redux, Mobx, HTML, Material UI, CSS, Eslint, Prettier, Axios, Git, Figma, Zeplin. Success-driven team player who continually meets and exceeds goals.

Software engineer with extensive experience in front-end development, including senior roles at AFEA Group and DAN.IT education. Proven track record in leading teams and teaching advanced JavaScript, evidenced by tenure as Senior Frontend Instructor. Holds a Bachelor of Computer Science with a notable GPA, underpinning a solid theoretical understanding of software engineering principles. Expertise in a broad technology stack including JavaScript (ES6, TypeScript, Three.js), React, Redux, and modern development tools (Webpack, Vite). Demonstrated ability to implement robust web solutions as seen in projects like an online QR code generator and a performance management platform. Proficiency in Agile/Scrum, SDLC, and Continuous Integration/Continuous Deployment (CI/CD) methodologies, enhancing project efficiency and deliverable quality.

- 3+ years of experience in Software development - Commercial experience with Node.js and Firebase - Extensive knowledge and experience in E-commerce (Shopify, Shopify Apps, Bigcommerce), Javascript development, debugging, and performance improvement. -Intermediate English

- 4+ years of commercial experience in IT - Experience in developing web applications using JavaScript (React, Redux) and TypeScript, CSS styling - New functionality development - Working with complex tasks and projects - Good logical thinking and team player, high level of responsibility, eager to learn new technologies - Modular, scalable and reusable code - Have a passion to work, proactive, self-managed, hard-working, result-oriented. - Good attention to details - Intermediate English. - Availability starting from ASAP.

Blockchain Developer | Web3 Engineer | Smart Contract Specialist Experienced Blockchain Developer with a deep understanding of decentralized applications (dApps), smart contracts, and blockchain architecture. Skilled in Ethereum, Solana, and Binance Smart Chain (BSC), with expertise in Solidity, Rust, and Web3 integrations. Passionate about building scalable, secure, and efficient blockchain solutions that drive innovation in DeFi, NFTs, and enterprise blockchain applications.Key Skills & Expertise: ✅ Blockchain Development: Smart contracts, tokenomics, DeFi protocols, NFT marketplaces ✅ Smart Contract Programming: Solidity, Rust, Move, Cairo ✅ Fullstack Web3 Development: Node.js, React, Next.js, Nest.js, Web3.js, Ethers.js ✅ Blockchain Frameworks: Ethereum, Solana, BSC, Polygon, Hyperledger ✅ Security & Auditing: Smart contract security, cryptography, vulnerability mitigation ✅ Infrastructure & DevOps: IPFS, The Graph, Oracles, Infura, Alchemy, Hardhat, Truffle ✅ Consensus & Protocols: Proof of Work (PoW), Proof of Stake (PoS), Layer 2 scaling

Accomplished Senior Web & Mobile App Developer with a robust educational foundation, holding a Bachelor of Science in Computer Science from the University of California, Berkeley. Possesses extensive experience with a tenure from July 2020 to August 2023 at Tech Innovators Inc., where contributions led to a 30% increase in user engagement for a million-user cross-platform app. A tenure as a Full-Stack Developer at Creative Solutions Ltd. from June 2016 to February 2020 resulted in a marked 25% client satisfaction increase. Expertise in a broad spectrum of technologies including WordPress, Shopify, PHP, React.js, Node.js, Android, React Native, and cloud platforms like Google Cloud and AWS. Strong ability in web scrapping, API integration, and database optimization. Proven track record in leading projects, mentoring teams, and fostering a culture of continuous improvement.

I am a high-energy, proactive Java developer with 4 years of hands-on experience in Java technologies. Throughout my career, I have worked on multiple projects, contributing to the development of scalable, efficient, and high-quality software solutions. I thrive in team environments, placing strong emphasis on collaboration and communication with teammates, cross-functional development teams, Product Owners, and Group Managers.My area of expertise includes but is not limited to:Java & Spring Ecosystem: Spring Boot, Spring Security, Spring Data Databases: PostgreSQL, MongoDB, MySQL Authentication & Security: Keycloak, JWT, OAuth2 Containerization & Deployment: Docker, Docker Compose Build & Migrations: Gradle, Flyway Testing & CI/CD: JUnit, TestContainers (learning CI/CD) Version controls: Git OS: Linux and Windows Rabbit MQ GraphQl