Hire Vetted Web Application Engineers at Upstaff - Page 18

All vetted software engineers you need to build AI, Web3, and data Products.
  • Dedicated Full-time commitment for long-term or Time& Material for shorter or ongoing support
  • Europe, Israel, LatAm, United States, Asia geography coverage
  • Remote and hybrid engagement
  • Trial period, no termination fees or hidden costs for transparent and risk-free onboarding.
React Native
React
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- React/React Native Engineer with almost 6 years of professional experience - Experience with Amazon/Amplify/S3/Code push - Successfully developed both iOS and Android applications using React Native - Developing React/React Native apps that interface with Restful APIs - Experience with React/Redux/Third-Party API Integrations - Experience with GraphQL/Apollo - Upper Intermediate English - Available ASAP
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Senior
Armenia
React
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- 6+ years of experience in IT- Intermediate English- Available ASAP
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Middle
Uzbekistan
JavaScript 5yr.
TypeScript 4yr.
React 4yr.
Redux 4yr.
RESTful API 4yr.
...
- Experienced software engineer with about 5 years of commercial front-end development experience. - Proficient in CSS, HTML, SASS/SCSS, JavaScript, TypeScript, React, and Redux. - Skilled in creating user interfaces, developing client-side and mobile applications, and implementing responsive design. - Strong problem-solving and analytical skills with a focus on cross-browser compatibility and responsive markup design. - Familiarity with Three.js for creating and displaying 3D graphics in a browser. - Knowledge of Agile methodologies and experience working in an Agile development environment. - Proficient in using Git for version control and collaborating with team members. - Experience with REST APIs, Postman, Firebase, MongoDB, Docker, Jenkins, and Webpack for building and deploying applications. - Familiarity with software development practices, SDLC, and code review processes. - Strong communication skills and ability to work in a team environment. - Bachelor's degree in Computer Science or related field (if mentioned).
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PHP 5yr.
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- Experienced full-stack developer with a strong background in software engineering and computer science education; - Proficient in Node.js, React, and PHP, with expertise in OOP and TypeScript; - Skilled in creating projects from scratch and working with legacy code; - Experienced in API integrations, including AWS S3, Google Maps, and Mailchimp; - Familiar with various technologies and frameworks such as Docker, PostgreSQL, Redis, and Laravel; - Strong understanding of SDLC, software development practices, and Agile methodologies; - Excellent communication skills and experience working with international customers and teams.
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Senior
Kyiv, Ukraine
JavaScript
React
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- 4+ years of practical experience in web development in the Front-end developer position - He has experience in developing web applications using VueJS, jQuery, JavaScript - He has blockchain experience - Upper-Intermediate English
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Senior
Ukraine
JavaScript 5yr.
TypeScript 2yr.
Angular 2yr.
React 2yr.
Vue-bootsrap 2yr.
...
Software engineer with extensive experience in front-end and back-end development, proficient in Core JavaScript and DOM API as well as Angular, React, and Vue. Valuable contributor to cross-functional teams with a track record of optimizing performance and streamlining SDLC through Agile methodologies. Recognized for delivering high-quality, user-friendly software solutions that exceed client expectations and contribute to business growth. Holds a First Class Honours BSc in Information Technology and Business Information System from MiddleSex University and an Advanced Diploma in Software Engineering from Aptech, distinguished by technical rigour and a practical approach to problem-solving. Employs a combination of in-depth technical expertise in the JavaScript ecosystem, software development best practices, and continuous professional development to drive impactful innovations.
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Senior
Zebbug, Malta
Magento 2 4yr.
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- Magento Frontend Developer with more than 3,5 years of experience. - PWA Experience of 5 months - E-commerce systems development. - Informational sites development. - Corporate portals development. - Upper- Intermediate English. - Available ASAP.
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Middle
Rivne, Ukraine
Vue-bootsrap
Vue.js
Vuex
JavaScript
Webpack
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I’ve been a front-end developer since 2019. Flexible, self-dependent, communicable person. I’m looking for ways to develop my programming skills. I have experience with responsive layout, web sites, mini applications in JS and SPA in Vue.js.
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Middle
Minsk, Belarus
JavaScript
Vuex
SQL
jQuery
Vue.js
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Hardworking front-end developer with 3+ years of extensive experience. I’ve worked on several challenging projects and have solid technical knowledge.
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WordPress 5yr.
Vue.js 5yr.
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- More than 5 years of software development experience using Vue.js, - More than 5 years using WordPress technology. - Intermediate English. - Available ASAP.
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Senior
Ukraine
JavaScript 7yr.
Vue.js 5yr.
Python 3yr.
PostgreSQL 3yr.
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Seasoned Full-Stack Engineer with 6+ years of significant experience in designing and building sophisticated web applications, with a particular strength in revenue management systems for the Japanese market. Known for exceptional proficiency in Python, JavaScript, and modern web technologies like Django, Flask, Vue.js, and React. Adept at all stages of software development from requirement analysis to deployment, consistently delivering projects that prioritize user experience and maintainability. Distinctive competencies include deep understanding of data visualization as evidenced by the implementation of complex features for SaaS platforms, combined with proficiency in critical full-stack development tools and practices such as Docker, CI/CD, and AWS. Recognized for a track record of remote freelancing success on Upwork, citing 100% job satisfaction over 24 jobs and more than 5,623 remote hours. Backed by a solid foundation in computer science with a completion of the reputable CS50x course from Harvard University.
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Senior
Banha, Egypt
Vue.js
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- 11+ years of experience in Full Stack Engineer with main focus on JavaScript/TypeScript. - Experienced with all stages of the development cycle for dynamic web projects. - Well-versed in React/Redux & Vue & Angular. - Fluent English - Available ASAP - No vacation plans
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Senior
Quebec, Canada
JavaScript
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- 4+ years of commercial experience in IT. - Experience in developing applications using JavaScript (Vue). - Good knowledge in JavaScript - Experience in Single Page Applications Development - Intermediate English - Available ASAP
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JavaScript 3yr.
Vue.js 3yr.
Vuex 3yr.
Bootstrap 4 3yr.
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Good understanding of HTML5 and CSS3. Highly proficient with Vue.js framework and its core principles. Ready to start ASAP.
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Middle
Minsk, Belarus
JavaScript 7yr.
WordPress 7yr.
Vue.js 5yr.
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As an experienced web developer with 7 years of experience specialising in developing WordPress websites of varying complexity. In the last 3 years, has focused on honing my skills in JavaScript, with a particular emphasis on using Vue/Vuex and WordPress REST API.
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Senior
Kyiv, Ukraine
Vue.js 12yr.
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- 14+ years of experience in Web & Mobile App development - Fluent English - Available ASAP - No vacation plans
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Senior
Nanaimo, Canada
jQuery
Vue.js
Vuex
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- 8+ years of commercial experience in IT - Experience in developing web applications using Vue.JS (Vuex, Vuetify) - Intermediate English - Good logical thinking, high level of responsibility. Communicative, responsible, hardworking, result-oriented, and team player - Available ASAP
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Senior
Republic of Moldova
JavaScript 5yr.
SQL 5yr.
PHP 2yr.
Java
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Software engineer with a Bachelor's degree in Computer Science from Illinois State University, exhibiting a solid grasp of programming methodologies and a 3.1 GPA. Accumulated over four and a half years of professional experience in web development, specializing in technologies such as Vue.js, Joomla, PHP, and cloud computing with AWS. Demonstrated proficiency in deploying complex applications to Kubernetes clusters and optimizing web content. Showcased commitment to continuous improvement by contributing to open-source projects and designing tools like a real-time log analyzer with NUXT.js and a Laravel command-line tool. Robust technical skill set includes JavaScript, PHP, Python, Java, Swift, Rust, alongside tools like GitHub, NoSQL, and REST APIs, ensuring the engineer is well-equipped to tackle a diverse range of software challenges and contribute significantly to any development team.
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SQL/NoSQL 25yr.
OpenAPI 10yr.
.NET MAUI 2yr.
Kotlin Multiplatform Mobile 2yr.
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- Having over 25 years of experience as a Senior Software Solutions Architect, Hands-on Technical Team Leader, Full Stack Software Engineer, Business Intelligence (BI), and Applicative Database Administrator (ADBA) - Engineer with extensive experience in software development, demonstrating proficiency in multiple programming languages, including Java, C#, and Python. - Proficient with modern software development methodologies such as Agile and Scrum, ensuring project delivery aligns with business requirements and timelines. - Strong background in computer science with a focus on developing scalable and efficient code, contributing to robust software architecture. - Experience in full software development life cycle (SDLC), including requirements analysis, design, implementation, testing, and maintenance. - Expertise in applying best practices and patterns in software engineering to produce high-quality and reusable code. - Demonstrated success in past projects by optimizing system performance and enhancing user experience through innovative technical solutions.
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Expert
Ramat HaSharon, Israel
C/C++/C# 5yr.
.NET Core 5yr.
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- Full-Stack Developer with 5 years of experience, specialized expertise in C#, .NET frameworks, Angular, and various other modern technologies. - Demonstrated excellence in the design and implementation of user interfaces using HTML/CSS, TypeScript, and JavaScript, with a keen eye for transforming complex database information into accessible analytical insights. - Proven experience with automated validation, shipment update services, database design, and software development practices including OOP, SOLID principles, and Scrum methodology. - Strong background in computer science with a Bachelor's in Applied Mathematics and Informatics, enhanced by comprehensive skills in development tools such as Git, Visual Studio, and Azure.
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Java
PostgreSQL
Hibernate
Spring Boot
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- 15+ years of experience as a Software Engineer, specializing in Java, microservices, and system design for backend development; - Expertise in developing and maintaining scalable web applications and microservices with a focus on performance optimization; - Strong experience in building applications using Spring Boot, Kafka, Docker, and RESTful API design; - Proficient in integrating third-party APIs and cloud-based solutions, with a strong background in Azure and AWS platforms; - Extensive experience with SQL (PostgreSQL, Oracle DB) and NoSQL (MongoDB) databases; - Familiar with CI/CD pipelines, using Jenkins, GitHub Actions, and AWS SDK for continuous integration and deployment; - In-depth knowledge of Agile methodologies, contributing to sprint planning, code reviews, and project delivery in international teams; - Experience in unit testing, integration testing, and ensuring high code quality with tools such as JUnit and RestAssured; - Worked on high-stakes projects in the finance, telecom, healthcare, and insurance industries, delivering critical software solutions; - Strong leadership and mentoring experience, managing development teams and delivering successful projects.
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Expert
Krakow, Poland
Go
Node.js
TypeScript
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A seasoned Fullstack Golang Developer with over 5 years of specialized experience in Golang, and a broader 9 years with Node.js, complemented by proficiency in other languages such as TypeScript, PHP, and Python. The candidate showcases a strong foundation in computer science with a Bachelor of Engineering in Information Systems Engineering. Throughout their career, they have engaged in various remote roles, underlying their expertise in building scalable distributed systems and web applications. Their open-source contributions, such as 'asyncmachine-go', demonstrate their ability to innovate in control flow libraries. With a history of optimizing financial tech systems and developing complex project management PWAs, the engineer has a proven track record in software engineering, underpinned by knowledge of databases and DevOps, including MySQL, PostgreSQL, and Docker.
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Responsive Design
Website optimizations
Web Development
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solid foundation in front-end development Demonstrates expertise in JavaScript, React, HTML, CSS, and TailwindCSS, with a proven track record of optimizing websites and debugging.
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React 5yr.
GraphQL 3yr.
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- Frontend Developer at Liorra Tech and previous experience as a Freelance Web Developer and an IT Technician, embodies a strong background in full-stack development and cloud architecture. - Mastery in React, Apollo GraphQL, and technical support, offering robust solutions in technology services and leading digital transformation projects. - Proven history in enterprise-level software implementation and cloud solutions, adept at optimizing operations to meet business objectives. - Academically fortified with a Bachelor's Honors in Computer Engineering ongoing at Cape Peninsula University of Technology, with prior Bachelor's and Higher National Diploma in the same discipline. - Over 5 years of practical industry experience, with specialization in React and related web technologies, empowering businesses across Western Cape, South Africa. - Adept in software development practices, capable of guiding teams through SDLC and deploying innovative technologies that contribute to enterprise efficacy.
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Middle
Cape Town, South Africa
PHP 9yr.
JavaScript 9yr.
MySQL 9yr.
Solidity
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- 10+ years experience as a Full-Stack Developer with of developing robust web applications and services, including extensive experience in both frontend and backend technologies; - Technical proficiency with PHP and MySQL for server-side development, advanced JavaScript utilization on the client side; - Strong abilities with blockchain technology engagement, including smart contracts and wallet development using Solidity, Hardhat, Truffle, WalletConnect, and Metamask SDK; - Experienced with libraries Web3.js, and Ethers.js; - Ability to work Ethereum Blockchain, Binance Smart Chain (BSC), with different wallets including MetaMask; - Adept at working with a variety of frameworks and languages beyond core competencies, such as Laravel, Solidity, Node.js, and C++; - Up-to-date with modern practices, possessing comprehensive experience in codebase upgrades, performance optimization, and integrating third-party APIs; - Successfully led a development team, demonstrating strong leadership and project estimation skills.
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.NET 10yr.
AWS
Angular
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- 5+ years of experience as a Full-Stack Developer, specializing in .NET (C#), Angular, and AWS; - Backend: Expertise in .NET Core, ASP.NET, Entity Framework, and REST API development; - Frontend: Strong skills in Angular, TypeScript, JavaScript, HTML, and CSS for building dynamic web applications; - Cloud & DevOps: Hands-on experience with AWS services (Lambda, S3, DynamoDB, API Gateway, IAM) and CI/CD pipelines; - Databases: Proficient in SQL Server and PostgreSQL, including query optimization and database design; - Architecture & Best Practices: Experience with microservices, event-driven architecture, and SOLID principles; - Testing & Security: Writing unit and integration tests, implementing security best practices, and API authentication; - Agile & Collaboration: Worked in Agile/Scrum teams, participated in code reviews, technical discussions, and mentoring; - Background in finance, e-commerce, and SaaS projects, developing scalable and high-performance applications.
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Senior
Madrid, Spain
Java 5yr.
SDLC 5yr.
1C
VBA
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Software Engineer with 5+ years of expertise in developing Java-based enterprise and fintech applications. Spearheaded a 15-member team with a focus on cross-functional collaboration to enhance project outcomes. Highlights include raising production system TPS to 500, reducing bug rates by 15%, and improving application uptime. Excelled in a lead role at i2c Inc., with achievements in reengineering APIs for better performance, implementing DevOps practices, and ensuring 100% system uptime. Technical strengths encompass Java, microservices using Spring Boot, distributed systems, API development, and proficiency with Docker, Kubernetes, and CI/CD. Holds a Bachelor's in Computer Science, backed by industry recognition with the Dean's List Academic Achievement Award.
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Senior
Lahore, Pakistan
.NET 7yr.
C# 6yr.
EF Core 6yr.
React 5yr.
Microsoft SQL Server 3yr.
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Senior .Net Developer with over 6.5 years of experience, specializing in robust web application development in .Net and React, with a strong background in Computer Science. Possesses a solid understanding of Agile methodologies, microservices architecture, and full-stack development. Demonstrates expertise in .Net Core, ASP.NET MVC, EF Core, OAuth 2.0, Docker, Kubernetes, and Azure services. Notable accomplishments include leading the development of an internal generic library and a bug-reporting application, as well as achieving a Microsoft Azure Fundamentals certification and winning at the World Robot Olympiad. Education includes an MSc in Computer Science with a focus on Software and Service Architectures.
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Java
Kotlin
Docker
Selenium RC
Playwright
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- 10+ years in software quality engineering, with a focus on automation testing and software development for tests; - Automation tools: Selenium WebDriver, TestNG, Selenide, RestAssured, JUnit, Playwright; - CI/CD maintenance using Jenkins, GitHub Actions, AWS SDK, and Docker, docker compose; - Designed and implemented functional, integration, end-to-end, API, and performance tests; - Programming languages: Java, Kotlin, TypeScript; - QA tools: Selenium, Cucumber, JMeter, Postman, Playwright, FitNesse; - Developed and maintained test automation frameworks from scratch, scaling regression suites to over 1,000 tests; - Experience testing RESTful APIs, GraphQL, backend systems, browser front-end - SQL databases: PostgreSQL, MySQL; - Experience in finance, logistics, SaaS, and e-commerce, sectors working on large-scale systems and being a part if international teams ; - Contributed to test planning, test documentation, and incident investigation processes (e.g., AWS CloudWatch Insights); - Mentored junior engineers and conducted technical interviews.
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Expert
Lyon, France
React 5yr.
JavaScript 5yr.
Node.js 4yr.
API testing
QA Automation
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The software engineer in profile brings a robust blend of technical abilities and concrete achievements in software development, particularly in JavaScript. With experience ranging from back-end development to DevOps, they have demonstrated proficiency in automation tools like Cypress and Playwright, and testing frameworks such as Jest. They have excelled in roles at tretton37 and SMARTIS, impacting major clients like Polestar and IKEA through initiatives like complete architecture overhauls, developing CI/CD pipelines, and leading the migration of critical systems to the cloud. Their dedication to efficient, quality code is evident in their restructure of automation initiatives and focus on scalability and performance. The engineer has a Bachelor's degree in Organization and Management of Information Systems along with several impactful projects manifesting a deep understanding of SDLC and IaC principles. Overall, the candidate showcases several years of impactful work experience with a strong foundation in computer science and valuable technical expertise.
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Senior
Ljubljana, Slovenia
Python 6yr.
Django REST framework 6yr.
Celery 5yr.
PostgreSQL 5yr.
JavaScript 2yr.
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Dynamic Senior Backend Developer with over four years of experience specializing in Python and Django, with a solid foundation in computer science from a notable technical university. Expertise in developing RESTful APIs, working with multiple datastores including MySQL, SQLite, and MongoDB, and proficient in containerization with Docker. Adept at architectural design and patterns, and implementing Agile/Scrum methodologies for efficient project management. Demonstrated record in optimizing web applications and backend systems, with a rich portfolio inclusive of scalable solutions like a medical services booking application, storage booking system, and a car management dashboard. Fluent in both Ukrainian and Russian, with intermediate command over the English language, reinforces communication skills vital for international client interactions.
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Go 3yr.
Python 1yr.
TypeScript 1yr.
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Software Developer | Backend & Web3 Engineer | Golang, TypeScript, PythonResults-driven software developer with 3+ years of experience in building scalable backend systems, financial infrastructure, and Web3 solutions. Proficient in Golang, Python, TypeScript, C++, and cloud-native technologies (AWS, Kubernetes, Docker).🔹 Currently at Syndr, designing high-performance exchange servers, optimizing data pipelines, and developing Web3 SDKs. 🔹 Previously at Epifi, led UPI-based financial workflows and transaction processing using Temporal. 🔹 Ex-Smarsh, where I improved database architecture and query performance for SaaS compliance solutions.Passionate about distributed systems, blockchain, and high-performance computing. Active contributor to open-source and tech communities.📌 GitHub: AbhinitKumarRai | LinkedIn: Abhinit Rai
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