Hire the best
freelance UI Engineering developers

Joshua Z.

Freelance UI Engineering developer in Costa Rica

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My name’s Joshua, I’m over 30's, I have worked as a software engineer and performed other kinds of roles for several companies including startups for over more than 9-10 years, in agile teams, working mostly on QA and SDET (Software Developer Engineer In Test), with Javascript and others as part of my portfolio experiences. I prefer to work in small teams and see the direct impact I have on a project and on the organization at the same time, I normally support the organization at the leadership level in many cases and aspects of daily operations. Other than that I am more or less an ordinary guy, with a wife and beautiful daughter, and a passion for woodworking and Design. Is there anything else you’d like to know about my life at the moment? I'm open to meeting us and seeing what we can accomplish together. my portfolio on [https://www.behance.net/jbricenoz](https://www.behance.net/jbricenoz)

Ui test automation • 10 yrsQuality Assurance Specialist • 10 yrsTest Automation • 10 yrsPlaywright • 5 yrsSQL • 10 yrsCypress.io • 4 yrsPythonNode.jsJavaScriptJestOpaBlockchainMetaverseC#PostgreSQLCucumberProtractorCypress

+11

Puneet K.

Freelance UI Engineering developer in India

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Puneet is a passionate automation test engineer based out of India with several years of industrial experience. he has exposure of working with the development team for Oracle India Pvt Ltd. He is also an open-source enthusiast who regularly contributes to projects like Joomla, CodeceptJS, and Percona. Puneet is easy to work with due to his creativity, excellent communication and strategic skills, and gift for planning and organization.

UI Testing • 6 yrsQA • 9 yrsTest Automation • 9 yrsContinuous Integration • 7 yrsSelenium • 7 yrsAutomation • 6 yrsApi testing • 6 yrsMobile App Testing • 3 yrsPHPMongoDBJenkinsTest driven developmentJavaScriptFunctional Testing

+7

Emir K.

Freelance UI Engineering developer in Serbia

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I'm a seasoned software architect and developer located in Sarajevo, Bosnia and Herzegovina. With over 20 years of experience under my belt, I'm well-versed in everything from leading teams to flying solo on projects. I get a kick out of taking customer ideas and transforming them into something even better during the development journey. One of my specialties is identifying potential design flaws and refining user interfaces until user manuals become a thing of the past. My journey has taken me through a variety of roles and projects. I've done everything from software consultation and app design to data scraping, data mining, and full-stack development. Notable ventures include my work with the RapTToR agency, where I've developed large-scale systems, UI/UX enhancements, and marketing software. At Dare2Play, I took the lead on building an online crypto multiplayer gaming platform, managing game development teams, and architecting CI/CD setups. I've also lent my expertise to ventures like Goleudy Ventures, LLC, where I tackled image processing and created tools for image segmentation. I have worked with various platforms, languages, and frameworks. I'm well-acquainted with technologies like HTML5, PHP, Node.js, Python, Unity, Blockchain, and more. In the ever-evolving world of technology, I find myself constantly energized to take on new challenges and make innovative contributions. My goal is to not only meet but exceed expectations, and my extensive track record speaks for itself. Looking forward to the next exciting venture.

Reverse EngineeringUI designUX/UI DesignData EngineeringPHP • 15 yrsHTML/CSS • 10 yrsSQL • 10 yrsJavaScript • 10 yrsApplication Architecture • 10 yrsSoftware Architecture • 10 yrsDatabase • 10 yrsNode.js • 5 yrsPython • 3 yrsSEOAutomationMachine LearningApp StoreWeb ScrapingPayment gatewayE-commerceWeb DevelopmentFull StackDevelopmentApplication SecurityAndroid SDKBack-EndSoftware DevelopmentGame DesignBlockchainProblem solving skillsUser ResearchDesktop ApplicationsMobile App DevelopmentAIDevOpsHTML5APIDesignHTML5 CanvasTypeScriptBootstrapGameDockerReactWeb ServiceCryptocurrencySolidityApi testingTailwind cssMySQLPostgreSQLShellScrapyServer managementData AnalysisServer AdministrationData ScienceData VisualizationData structureData analyticsTerraformData ModelingCI/CD

+56

Hugh G.

UI Engineering developer in the United States

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Hi, my name’s Hugh Guiney (🗣 GUY-knee). I’m a UX Developer, which means I design and code thoughtful digital products. I’ve worked with organizations of all sizes, from startups to SMBs to household names. In my spare time I build open-source software, play fighting games, and perform improv comedy. ## Companies I’ve worked with 🏃‍♂️ Runkeeper 💚 Oxfam 🦁 Publicis Sapient 🏦 Citizens Bank 🎮 WB Games 👟 Reebok 📰 The Boston Globe 🏙 The City of Boston ## Services ### Development - HTML5, CSS3, & JavaScript (ES6+) - React— incl. Redux, Context, & Hooks - Node.js - Gatsby - WordPress - Shopify - SEO¹ & Performance ### Design - UI/UX (Look & Feel) - Information Architecture - Components & Design Systems - Usability/Accessibility - Copyediting - Logos & Brand Identity - Responsive Design ## The hughx Advantage: ### 🐖 Economical. With traditional app development, there are two main phases: design and development. First, the designer creates mockups—a series of pictures of what the app will look like. Then the developer translates those pictures into actual code. This duplicates the work of the designer, costing you time and money. Often the designer lacks technical knowledge. At best, this makes the developer’s job harder. At worst this means design revisions. Either way it means more time and more money. There’s a better way. As a hybrid designer–developer, I don’t do mockups—only functional prototypes. That way you can feel what the product will be like, rather than just imagine it. And with fewer cooks in the kitchen, you get to launch and iterate faster. ### ♿️ Empathetic. 50% of the world’s population isn’t online yet¹, but they soon will be. As this happens, they will largely arrive by way of mobile, not desktop. And not on the iPhone 11, either—more like the iPhone from 2011. This means sites and apps designed for Westerners with the latest tech will break for the rest of the world. I believe the Internet should be for everyone. I keep accessibility, performance, and user friendliness top-of-mind at every stage of development. This helps your product reach the broadest possible audience. It’s not just good karma, it’s good business. ### 🏛 Engineered. Just because you’re moving fast doesn’t mean you need to sacrifice quality. Today’s MVP is tomorrow’s legacy codebase. Left unpaid, technical debt manifests as bottlenecks. New features start to break old ones. The app slows to a crawl, increasing bounce rate and costing you sales. Current employees get pulled away from product work to help onboard new employees. Contracting with hughx is an insurance policy against code rot. Modular functions, unit tests, and detailed documentation all come standard. If your customers don’t thank you, your dev team will. ¹ Best practices only. I do not guarantee search engine ranking. ² Source: [Statistics on ITU](https://www.itu.int/en/ITU-D/Statistics/Pages/stat/default.aspx)

Material-UIHTML/CSS • 10 yrsJavaScript • 10 yrsReact • 3 yrsApache HTTP Server • 10 yrsGit • 10 yrsWordPress • 10 yrsLinux • 10 yrsMySQL • 10 yrsPHP • 10 yrsResponsive Design • 10 yrsAnimation • 3 yrsVue.js • 1 yrsStripe • 1 yrsFirebase • 1 yrsMongoDB • 1 yrsGraphQL • 1 yrsWeb Scraping • 1 yrsNode.jsGitHubTypeScriptnpmJiraConfluenceWebpackApolloXMLHTML5CSS3StartupsRDFaSemantic WebOpen Source SoftwareXcodeReact NativeRedux

+29

Marcel P.

Freelance UI Engineering developer in Brazil

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Please, visit my Linkedin for more details: [https://www.linkedin.com/in/marcel-pallete-81166b2b/](https://www.linkedin.com/in/marcel-pallete-81166b2b/) Experienced tech consultant, currently working as Data Tech Lead at Ernst & Young Brazil, focused in: \- SQL, Python, PySpark and Scala Languages \- Data Engineering \- Data Architecture \- ETL pipelines (By code or by ETL Tools like Pentaho, Alteryx, SSIS) \- Big Data (Spark, HDFS, Hive, NiFi, Kafka) \- Tuning and performance \- Azure Cloud (Data Factory, Databricks, Synapse Analytics, SQL DB, Data Lake Gen 2, Stream Analytics) \- Terraform and IaC for Azure Cloud \- Databases (SQL Server, PostgreSQL, Teradata, IBM DB2, MySQL) \- Data Modeling (Erwin, DW, DLH, OLAP/OLTP) \- Business Intelligence and DataViz (Power BI Expert level (M, DAX, DAX Studio, Tabular Editor), Tableau, Looker/Data Studio, Looker and LookML, Qliksense and Qlikview) \- Microsoft Fabric complete solution \- Microsoft Solutions (Power Platform, Power Automate, Sharepoint, Power Apps, Dataverse, Sharepoint)

Data Engineering • 5 yrsUX/UI DesignBig Data EngineeringUI designBig Data • 3 yrsEnglish • 10 yrsData Visualization • 7 yrsData warehouse • 5 yrsData modeling • 5 yrsPerformance Optimization • 5 yrsData Pipelines • 5 yrsETL • 5 yrsAzure • 3 yrsPythonSQLScalaMySQLGitMongoDBDatabasePostgreSQLSharePointNumPyGitHubAmazon S3Google AnalyticsPandasWeb ScrapingCloudQuery OptimizationSASIntegrationData MiningGitLabData analysisFabricAzure Queue StorageGoogle BigQueryDatabase NormalizationDockerPython 3TeradataPipelinesScrumLeadershipKanbanOLAPData MigrationTableauSQL QueriesDatabase TuningIBM DB2Data structureApache SparkMicrosoft SQL ServerAmazon RedshiftApache KafkaSQL TuningAzure SQLPower QueryLive StreamingHiveQLData processingPentahoStar SchemaData ManagementData analyticsQlik SenseJupyterTerraformApache HadoopAzure Machine LearningInfrastructure as CodeDAXAzure Service fabricData CleansingCloud ArchitecturePower BIData CleaningData IntegrationGoogle Data StudioAgileSQL DatabasesLookerSnowflakeAirflowData LakeData IngestionData architectureBig Data SQLPentaho Data IntegrationAlteryxData QualityApache AirflowData manipulationAzure SQL DatabaseDataflowData wranglingAzure table storageDatabricksData ValidationJupyterLabApache NiFiMicrosoft Power AppsAzure Blob StorageAzure Data FactoryData governanceBig data technologiesAzure SQL ServerSQL Performance TuningMicrosoft service fabricDBTAzure ConsultantMicrosoft Power AutomateData Warehouse TestingDelta LakeBig Data ArchitectureDataverseAzure Data EngineerAzure synapse analyticsAzure synapseVisual Data AnalyticsAzure Data LakeData pipeline designData Version ControlDelta TablesUX designAzure IoT EdgeJSONExcelMachine learningNoSQLAnalyticsWeb analyticsWireframing/prototypingUX ReviewAnalysisMathematicsData ScienceRequirements GatheringTechnical WritingNoSQL DatabaseProblem-solvingApache HiveMicrosoft Power PlatformQAStatisticsStrategy

+141

Nick K.

Freelance UI Engineering developer in the United States

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With over 25 years in the software industry, I bring a robust mix of hands-on engineering and management expertise. Currently, I lead the teams for Gemini Code Assist at Google, where we develop and scale backend systems and extensions for both VSCode and IntelliJ to deliver high-performance code assistance. As a startup founder and an innovator, I enjoy wearing multiple hats, diving into new technologies, and taking prototypes from rapid development to production-scale systems. Proficient in over 15 programming languages, I primarily focus on JavaScript, TypeScript, Node.js, Electron, and Web technologies, with occasional use of Python. My approach is rooted in scalable solutions and inspiring teams to deliver impactful results.

UX/UI Design • 10 yrsNode.js • 10 yrsJavaScript • 10 yrsReact • 8 yrsData Visualization • 10 yrsSearch algorithms • 10 yrs.NET • 10 yrsDevOps • 10 yrsTypeScript • 10 yrsHardware • 10 yrsHTML/CSS • 10 yrsTest Automation • 10 yrsNoSQL • 10 yrsPythonGoogle Cloud PlatformPlugin DevelopmentManagementIntellijArchitectural DesignGoVS CodeSoftware architectureGenerative AIGoogle geminiJavaC#C++Deno

+21

Gabriel C.

Freelance UI Engineering developer in Brazil

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Full-stack software engineer with 7+ years of experience, specialized in user-experience and front-end development. Certified scrum master with experience in technical leadership in projects for retail, health and finance industries. Experienced with the popular frameworks such as React and Vue. Back-end stack includes Node, Python, MySQL, Postgres, Firebase, AWS and GCP.

UX/UI Design • 5 yrsVue.js • 5 yrsHTML/CSS • 5 yrsReact • 2 yrsJavaScript • 8 yrsTypeScript • 3 yrsManagement • 3 yrsNode.js • 2 yrsMobile App Development • 1 yrsPython • 1 yrsGraphQLAWSVue.js 3AngularAzureLiferay

+9

Rajesh D.

Freelance UI Engineering developer in India

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Hi, I'm Rajesh Dhiman, a seasoned Full-Stack Developer with over 12 years of experience in building and leading scalable web applications. I specialize in Node.js, React, and Vue.js, with a proven track record in optimizing performance and ensuring data security. I have successfully led international development teams, delivering robust, high-quality software solutions for high-profile clients. My experience spans across frontend and backend development, API design, and cloud services. I am passionate about innovation and dedicated to helping others enhance their coding skills and achieve their development goals. **Areas of Expertise:** - Full-Stack Development (Node.js, React, Vue.js) - API Design & Development - Performance Optimization - Cloud Services (AWS, Azure) - Team Leadership & Mentorship - Agile & Lean Methodologies Let's work together to turn your ideas into reality!

Material-UIJavaScript • 10 yrsNode.js • 7 yrsReact • 4 yrsHTML/CSS • 10 yrsMongoDB • 7 yrsSQL • 3 yrsVue.js • 1 yrsCOVID-19 • 1 yrsGitTypeScriptMobXAPI IntegrationAnt DesignExpress.jsAlgoliaVuexMongooseLeafletNext.js

+13

Jorge R.

Freelance UI Engineering developer in Mexico

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Software Engineer with 10+ years of experience working in large enterprises and Silicon Valley startups. I grew the most professionally at Vest. This was my first experience building a product from scratch to launch. I could live with all the processes, and dealing with an old industry such as Finance was a huge challenge. I was the company's first front-end engineer and managed a team of four people. Lots of learning during that time, both personally and professionally. We managed to deliver several projects successfully and I feel proud of our work. When I worked at GIR, I refactored the company's main product. Before this refactor, the team could last ~5 days to deliver a feature, given that the entire project wasn't easy to read. After this refactor (and as a result), each feature lasted two days at maximum, so the developer experience increased, and we could finish the project earlier. I got a promotion to Frontend Leader after. I am a passionate engineer, a great team player, and willing to take ownership.

EngineeringJavaScript • 8 yrsReact • 5 yrsTypeScript • 4 yrsHTML/CSS • 8 yrsNode.js • 6 yrsRedux • 2 yrsGraphQL • 2 yrsAngularElectronCI/CDDesign SystemsSoftware architectureReact NativeExpoMongoDBEthereumReact HooksReact Testing LibraryViteReact Query

+14

Thomas L.

Freelance UI Engineering developer in the United States

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Senior full-stack software engineer, skilled in enhancing teams, products, and organizational performance. Specializing in frameworks for React, Angular, & Vue to create stunning applications empowering your business.

Kendo UIAngular • 8 yrsReact • 5 yrsVue.js • 3 yrsTypeScript • 8 yrsJest • 7 yrsMongoDB • 7 yrsNode.js • 7 yrsIonic • 7 yrsFirebase • 6 yrsGoogle Cloud Platform • 5 yrsHTML/CSSSQLMySQLGitBackbone.jsOraclePostgreSQLSeleniumPrimeFacesGitHubResponsive DesignNoSQLCassandraMongooseCucumberUnderscore.jsHandlebars.jsJasmineJiraStripeGitLabBootstrapMariaDBMochaEs6Cloud HostingGruntSketchScrumSendGridChaiJavaScriptWebpackCordova PluginsRxJSSubversionhapi.jsReduxGraphQLPostmanIonic 2AWS LambdaNgRxGatsbyApache cordovaGatsby.jsVuexAdobe XDAgileNext.jsCI/CDNoSQL DatabaseIonic 3FigmaRESTful APINestJSGraphql.jsAngular 6Tailwind cssContentful CMSSassExpress.jsAWSJavaJPAJDBCGradleSpring BootHibernate ORMTableauOracle SQLVBA for AccessOracle Database

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