Hire the best Code Refactoring specialists
Check out Code Refactoring specialists with the skills you need for your next job.
- US$42 hourly
- 5.0/5
- (190 jobs)
I can't say for sure but I have the impression that very few people (if any) in the IT field have read the "Message to Garcia" by Elbert Hubbard. I have read it and I dare to consider myself one of the people, who are able to "bring the message". There always will be someone who is more creative, knows more or works faster than me. I am aware of that and I accept it. Still, I am quite confident of being a better prepared professional than the average IT guy. I have 20 years of experience in programming, database modelling, system design and architecture, business processes analyses and automation, basic managerial accounting, Linux and network administration, Asterisk (FreePBX) configuration. I have successfully solved various business-related software and hardware challenges. Being able to combine both low-level and high-level allows me to work on wide range of tasks. I have reverse engineered and fully decompiled about a dozen Delphi components and desktop applications. Assembler was my 2nd language (after BASIC) and my first significant application was a player for tracker music entirely written in Assembler - with bass/treble digital filters. I like digging deeper and understanding the root cause. I am quite good at debugging and troubleshooting - and this is not an empty claim. Some of my achievements: - developed 2 full-blown ERPs (for Walltopia and Composite-X) - developed 2 accounting / warehousing applications with OLAP reporting and hierarchical multi-dimensional accounts - developed Windows service daemon for logging Skype chats to a REST API in real-time - ported one large desktop application (Interactive Delphi Reconstructor) from Borland CBuilder to Delphi - implemented a company-wide real-time backup solution using Yadis or Bvckup, Samba and NappIT on OpenIndiana - developed Linux daemon for controlling large LED strips based on WS2811 (and organized into X/Y matrix) through TCP/UDP socket - developed combined CDR reporting, matching information from the local Asterisk PBX with billing information from the VoIP providers - implemented Linux daemon for reading SMDR/CDR data from Panasonic PBX TDA-200 and storing in MySQL with reporting capabilities - developed custom reporting module for a 3rd party security access control system and integrated it with the in-house ERP system I choose my clients as carefully as you choose your freelancers. I value honesty, respect, good communication, good sense of humor, intelligence, modesty, kindness, generosity. I prefer to develop from scratch custom business solutions automating the workflow of small businesses. My previous experience with the 2 ERP systems I already developed (and which are used 24/7 by customers and employees) is of enormous benefit. I feel truly happy when I am able to help a client by removing the burden and simplifying the workflow. What can you expect from me: - educating and explaining the things which are too technical and unfamiliar to you - asking good questions - providing meaningful advises and recommendations - not trying to suck additional money by finding extra work of low business value - understanding your real business needs and goals - keeping you from making worthless or unwise expenses - excellent responsiveness - taking precautions against damaging your data - really listening to you and your problems/pain points - acknowledging my faults - enjoying good jokes - not quietly disappearing after faced with some tough challenge - honestly admitting when I do not know something or not being qualified enough - not over-complicating the solution - being available for support and further assistance after the final deployment - solving difficult problems - positive skepticism - breadth of knowledge - ability to “finish” - introspective, self-motivated to constantly improve - perseverance, scrappy in the face of setbacks, doesn’t “get blocked” - systems design ability - empathy for users - taking pains to write readable and maintainable code - methodical and analytical: can diagnose the most mysterious bugs or find the source of performance bottlenecksCode RefactoringHTMLVuetifyERP SoftwareDatabase DesignVuexBusiness AnalysisVue.jsSQLJavaScriptTailwind CSSRESTful APIPostgreSQLQuasar FrameworkSoftware Debugging - US$30 hourly
- 4.9/5
- (20 jobs)
Web development is about bringing ideas to life online. With over 8 years in this field, I am skilled in using frameworks like NextJs, React, and Laravel. Hello! I'm Lathindu Pramuditha, a leading full-stack web developer. As a top-rated developer on Upwork, I have a perfect job success rate. This reflects my strong commitment and skills in web development. - I create easy-to-use, attractive e-commerce websites that help increase sales. - I develop professional, responsive websites that match your brand. - I design engaging travel sites with easy booking options and efficient hotel management systems. - I develop complete HR solutions and online platforms for restaurants, including order and reservation systems. - I do any kind of custom web development. My Role as a Leader: I am the Founder and CEO of Axcertro (Pvt) Ltd. This position highlights my commitment to leading and innovating in the tech industry. Why Work with Me? I offer more than technical skills. I bring a unique vision to each project. I am dedicated to ensuring every project is well-executed and meets high standards. I value teamwork and believe in the power of diverse ideas and expertise. With over 8 years in web development, I have developed a wide range of skills and built a portfolio that showcases my expertise. Contact me if you need a web developer with skill, passion, and experience. I am ready to make your digital goals a reality!Code RefactoringVue.jsStripeAPI IntegrationTailwind CSSAPIEthereumDatabase ManagementLeSS FrameworkMySQLPayPal IntegrationCSSWebsiteJavaScriptReactHTMLCustom Content Management SystemCustom Ecommerce StoreLanding PageLaravelPHPCustom Web DesignWeb DesignWeb Development - US$30 hourly
- 3.9/5
- (36 jobs)
Welcome to Area 53, we have all the advanced technology your company will ever need! Experience that goes back over twenty years. Looking to provide high quality C++ and C# development to yield awesome bug-free products. Using the latest lean, clean, agile development processes which include the usage of Slack, MS Teams/DevOps, Jira, Git, Bitbucket, IDE's: Developer Studio 2019, Eclipse, NetBeans and more! Specialize in custom applications development, spanning both the software and hardware worlds. It ranges fully across the spectrum. The software side includes but is not limited to C#, C++, WPF, DirectX, DirectShow and XNA, .Net Framework Apps/Services (includes ASP.Net), and many other older technologies such as MFC/ATL too. Worked with many common MCU's (embedded processors) used out in the field today. Such as ARM core types, Atmel, Pic, Motorola, Freescale, Marvell, RPI, etc. Have both written full bootstrap and OS code as well as the many app(s), for many of these devices. Have also worked with an RTOS such as FreeRtos, Greenhill, etc. So let us get your project off the ground and flying. Thanks for stopping by.Code RefactoringRaspberry PiLinuxEmbedded SystemMicrocontroller ProgrammingSoftware DesignSoftware DevelopmentComputer GraphicsAgile Software DevelopmentAndroid App DevelopmentHTMLMySQLJavaScriptC#C++ASP.NET - US$60 hourly
- 5.0/5
- (39 jobs)
◈ Top Rated Plus freelancer with 100% Job Success on Upwork ◈ More than 17 years of experiences using Microsoft tech stack to develop Web, Mobile and Windows based applications, with strong analytical skills and a broad range of computer expertise. ◈ An excellent problem-solver, able to quick grasp complex systems and identify opportunities for improvements and resolution of critical issues. ◈ Dynamic and committed in continue gaining knowledge of the business domain and latest technologies ◈ Excellent team player, skilled in enlisting the support of all team members in aligning with project and organizational goals.Code RefactoringWeb APIXAMLUnit TestingMicrosoft Silverlight.NET CoreMicrosoft Outlook DevelopmentEntity FrameworkMicrosoft SQL ServerjQueryAngularJSWindows Presentation FoundationASP.NET MVCC#Windows Communication Foundation - US$40 hourly
- 5.0/5
- (40 jobs)
I am a software engineer with over 10 years of experience in C++ Linux/Unix, Python and C# development. I have experiences in development of applications and software for various purposes including desktop applications, Linux drivers, SDK library, command line tools. I'm a hard working and reliable person always looking to grow my knowledge and learn new technologies and skills. I am improving my knowledge in the field of programming and application development by studying and completing appropriate training courses. I graduated from State Engineering University in Armenia with a Master's degree in Information Technology. Specialties: C++, C, C#, Qt, PythonCode RefactoringApps Script APIBash ProgrammingGoogle Chrome ExtensionQt FrameworkPythonGitC#C++ - US$60 hourly
- 4.7/5
- (7 jobs)
Hi there! I’m Umberto Giacobbi senior IT professional with 25+ years of experience in the Microsoft ecosystem. I started my career as a web developer and over the years I've have expanded my skills to other areas beyond coding. I've driven the development of complex software projects, working with all the relevant stakeholders. I have expertise in desktop technologies like WinForms, WPF, XAML, and .NET MAUI, as well as web and cloud technologies like Node.js, .NET Core, OpenSilver, SQL Server, AWS, and Azure. I also have experience with tools like GIT, Jira, GitHub, Mercurial, VSTO, InVision, Figma, Visual Studio Code, Arduino IDE and countless more. As a developer, I have created and supervised projects ranging from small websites to large warehouse management systems, integrating them with different systems and third-party solutions. As a CTO, I have led startups across two continents (US/EU, and now also the SEA area). I’m looking for long-term collaborations with smart and fair customers who value quality software development. If you have a .NET project that needs a professional touch, I’m the person you need. Contact me anytime, and I’ll get back to you within 24h.Code Refactoring.NET CoreXAMLASP.NETASP.NET Web APIWindows FormsDesktop ApplicationWindows Presentation FoundationMicrosoft SQL ServerC#GitMicrosoft Visual Studio.NET Framework - US$45 hourly
- 4.9/5
- (35 jobs)
Welcome !!! With a strong foundation in C++, C#, and Java, I specialize in crafting robust desktop applications utilizing .NET, WPF, and JavaFX frameworks. My expertise extends to the embedded systems, particularly focusing on ARM Cortex-M microcontrollers (mostly STM32 and TI), where I excel in developing front-end applications and leveraging technologies like FreeRTOS, LwIP, mbedTLS, aws-iot, TouchGFX. Having a keen eye for detail, I bring creativity and efficiency to every project, ensuring seamless user experiences across various platforms. Whether it's building intuitive desktop interfaces or optimizing performance for embedded systems, I am committed to delivering solutions that exceed expectations. Moreover, I am well-versed in backend development, proficient in ASP .NET and Node.js, enabling me to integrate comprehensive backend functionalities seamlessly into applications. With a track record of successful projects and a dedication to staying updated with the latest industry trends, I am eager to collaborate on your next venture. Let's turn your ideas into reality. Connect with me to discuss your project requirements and explore how we can achieve your goals together.Code RefactoringReverse EngineeringOpenCVSTM32Embedded SystemRaspberry Pi FirmwareC.NET FrameworkJavaC++C# - US$150 hourly
- 4.9/5
- (44 jobs)
California-based programmer with an extensive background in a variety of technologies, including desktop, mobile, and web platforms. I deliver high quality software by communicating with my clients effectively and working tirelessly to understand their exact needs for a project. With a thorough analysis of the problem and an effectively designed solution, I'm able to leverage years of independent software experience to implement and deliver your product quickly and effectively. I graduated from Santa Clara University with a Master's degree in Software Engineering in 2012, and have spent the last decade working with clients all over the Silicon Valley area. Here on Upwork, I've achieved and currently hold the Top Rated, Top Rated Plus, and Expert-Vetted talent badges - which are the highest the platform offers. I've also acquired AWS certifications in a variety of disciplines, all of which contribute to my broad understanding of technical domains and enhance my ability to design and implement effective solutions tailored to your project's needs. I strive to delight my clients with every project I undertake, and I would love to do the same for you. Please reach out if you have any questions!Code RefactoringSmart ContractCryptographyBlockchain DevelopmentCryptocurrencySolidityBlockchain ArchitectureAPIAmazon Web ServicesJSONC++PythonJavaScriptDesktop ApplicationAPI Integration - US$40 hourly
- 5.0/5
- (35 jobs)
I'm Jirayr Full-stack developer with 7 years of experience, during this time I've developed effective software industries such as Health care system, Software As A Service, IOT, and Production Monitoring software. I can proudly state that I have succeeded in all projects and positioned them in high rankings, and now I'm ready to explore new markets.Code RefactoringReact NativeCI/CDInternet of ThingsUnit TestingCelerySoftware DevelopmentVue.jsJavaScriptReactPythonPostgreSQLMySQLSoftware Architecture & DesignAmazon Web ServicesDjango - US$35 hourly
- 5.0/5
- (25 jobs)
During the last ten years of professional working experience, I gained a full understanding of the life cycle of software development. In software development process I tend to maximize attention to details and efficiency. With help of proven frameworks, UML tools, diagrams, design patterns and SDLC concepts I keep enhanced control over the development process and ensure that quality solutions meet business objectives. My core competency lies in the world of desktop applications using WPF and Winform technologies and web applications using Node JS, React JS and ASP.Net Web API. I love to do my work right and really enjoy being respected for the things I do. As a 24/7 hardworking professional with experience in various programming fields. I feel very proud to present myself and my skill-sets in one of the world’s best online-working marketplace. I pay special attention to the code readability and expansibility. I like to produce good, bug-free code and software. I don't only help my clients with developing new applications I also refactor their old code which was ignoring the best practices and optimize the applications. My job success rate is 100% and I am a top rated upwork developer because I always stick to deadlines I always deliver I have excellent communication skills I'm almost always available for clients via Skype I care about clients satisfaction so never hesitate to go an extra mile to meet their business needsCode Refactoring.NET CoreMicrosoft SQL Server ProgrammingSAP Crystal ReportsVisual BasicDesktop ApplicationWindows Presentation FoundationASP.NETBootstrapC#ASP.NET MVCADO.NET - US$50 hourly
- 4.9/5
- (29 jobs)
⭐️ Upwork Expert-Vetted • Top 1% ⭐️TOEFL C1 (July, 2023) ⭐️ Senior PHP Developer & Architect (20+ Years). PHP development (Symfony, Laravel), SaaS development, AI integration, Legacy Code Review & Refactoring, Highload Projects, API Development / 3rd-party API integration. Industry Experience: Education, Financial, Gaming, Social Networking, and Business sectors. Languages / Frameworks / CMS: PHP 8+, Symfony 5/6, Laravel, CodeIgniter, Yii, Kohana, Silex, WordPress, Drupal. Databases: MySQL, PostgreSQL, MS SQL, MariaDB, ElasticSearch, Solr, MongoDB via PHP/Node.JS drivers. Front-End & Scripting: JavaScript (jQuery, Ext.JS / Sencha, Prototype, Angular 12+, React), Node.JS (Express, Mongoose). Optimization & Highload: Experience managing 200K+ hosts/day & 2M pageviews, Memcached, APC, WinCache, PHP performance tuning. APIs & Integrations: OpenAI API, Telegram API, REST, SOAP, RPC, AJAX, Graph API, PayPal, Mandrill, MaroPost, BrainTree, InterSpire, GreenArrow, and more. Miscellaneous: phpExcel, wkHtmlToPDF, Node-FFI, php-FFI, Virtual Buckets sharding. Notable Projects: - Developed a Content Management Framework & Financial Invoice Exchange Engine. - Built a comprehensive Social Network platform, including friend mechanics and personalized newsfeeds. - Created an online dating service, multi-user chat system, and browser-based game. - Designed and supported a high-traffic newsfeed site with an editorial backend. Ethical Stance: I prioritize client data safety and NDA adherence. Consequently, I don't use software like Upwork TeamApp that might compromise sensitive data. Preferred Work Structure: Hourly projects. No fixed-price projects.Code RefactoringAmazonPHPRedisDrupalWordPressMySQLMongoDBLaravelNode.jsSymfonyJavaScript - US$45 hourly
- 4.8/5
- (14 jobs)
Experienced Associate Product Manager with over 10 years of experience in IT Industry. Excellent reputation for resolving problems, improving customer satisfaction, and driving overall operational improvements. Consistently saved costs while increasing profits.Code RefactoringWindows App DevelopmentAndroidDistributed ComputingSolution ArchitectureScrumProduct ManagementAngularASP.NET Web APIReactMicrosoft SQL ServerASP.NET MVC.NET FrameworkC# - US$40 hourly
- 5.0/5
- (94 jobs)
Accomplished professional with 20+ years hands-on experience and a background in complex and very large database driven projects design, development, database administration, performance tuning and troubleshooting seeking a challenging position where my experience and skills would be needed. Highly motivated, can do attitude, will happily work alone if required to, good communicator, can mentor and instruct, excellent customer facing skills, ability to estimate and document at all stages of the software lifecycle with a track record for accurate estimations. Able and willing to work overtime if / when needed, have a lot of experience and can work under stress. Motivated hard worker with professional attitude and work ethics.Willing to help, patient with people, constant learner. Excellent team player. All versions of SQL Server from 6.5 (SQL Server 6.5,7,2000, 2005, 2008, 2008R2, 2012,2014), SQL Server Analysis Services, SQL Server Integration Services (versions 2008, 2008R2, 2012), SQL Server Reporting Services (2008, 2008R2, 2012), Data-warehouse, ETL. Expert knowledge of T-SQL language, performance tuning and troubleshooting. Hands-on experience with most of the advanced SQL Server technologies like distributed queries, federated views, partitioned tables, XML and spatial data and many others. Excellent reputation of writing a top quality code, doing other's code review, debugging, fixing and troubleshooting database code. Very good SQL Server DBA skills, hands-on experience with mirroring, clustering, disaster/recovery setups (including complex and world-wide distributed solutions), backups and restores, DB defragmentation, reindexing and much more. Constantly learning «how things work» inside a SQL Server which helps me to design best possible solutions and to make fast, correct and effective desicions under high pressure or time limit.Code RefactoringPerformance OptimizationMicrosoft SQL Server AdministrationTransact-SQLETL - US$20 hourly
- 4.8/5
- (16 jobs)
Hey👋, Expert Full Stack Developer | React, Next.js, Node.js, Nest.js | 12+ Years of Experience | High-Performance Web Applications | Cloud Computing | DevOps | Python | 🔧 Key Skills: ✅ Front-End: React ⚛️, Next, Redux, TypeScript 🟦, HTML5, CSS3 ✅ Back-End: 🐍Python, Node.js 🌐, Nest, Express, GraphQL 🕸️, RESTful APIs ✅ Databases: PostgreSQL, MySQL, MongoDB, DynamoDB ✅ Cloud: AWS ☁️ (Lambda, S3, EC2, RDS), Azure, GCP ✅ DevOps: CI/CD, Jenkins, GitHub Actions, Docker 🐳, Kubernetes, Terraform ✅ AI/ML: TensorFlow 🤖, PyTorch, AWS SageMaker ✅ Microservices: Design, implementation, and management of microservices architectures ✅ Testing: Jest, Mocha, Cypress, Selenium ✅ Version Control: Git, GitHub, GitLab, Bitbucket 🚀 Highlights: ✅ Scalable Solutions: Developed applications serving millions globally 🌍 ✅ Cloud Migrations: Led migrations to AWS ☁️ ✅ Python Expertise: Leveraged Python for data analysis, automation scripts, and backend development 🐍 ✅ AI/ML Projects: Deployed predictive models and NLP solutions 🤖 ✅ Microservices: Designed and implemented microservices architectures for scalable, distributed systems ✅ DevOps: Established CI/CD pipelines and automated deployments 🔄 🛠️🔧🌟 I offer end-to-end development services, custom solutions, and a collaborative approach to bring your project to life. Let's build something exceptional together! 🌟🔧🛠️Code RefactoringTailwind CSSMicroserviceDevOpsArtificial IntelligenceUnit TestingExpressJSTypeScriptMongoDBGraphQLMaterial UIDjangoPythonNode.jsNext.jsReact - US$275 hourly
- 5.0/5
- (110 jobs)
I understand my rate is higher than most, and that's because I bring extensive experience working with companies like Google, Meta, Reddit & hundreds of start ups. My goal is to make sure your investment in development leads to growth and success. Shoot me a message, and we’ll schedule a call to discuss your project Here's what I've worked with Languages & Frameworks: Swift, Kotlin, React, React Native, Node.JS, Python, TypeScript Cloud Services: AWS & Google Cloud Certified AI & Machine Learning: Expertise in OpenAI API, LLM, and Diffusion Models Mobile Development: Custom iOS and Android apps built with Swift, Kotlin, and React Native. Web Development: Responsive and dynamic web applications using React and Node.JS. Backend Solutions: Robust backend development with Node.JS and Python. Cloud Integration: Seamless integration with AWS and Google Cloud services. AI Integration: Leveraging AI and machine learning models to enhance your applications.Code RefactoringRokuApple TV ApplicationSmart TVFigmaHigh Fidelity DesignJavaAndroidReact NativeAndroid App DevelopmentFirebaseSwiftAmazon Web ServicesNode.jsMobile App DevelopmentiOS Development - US$100 hourly
- 5.0/5
- (19 jobs)
I have 10+ years of experience in building user-friendly and complex mobile applications. I have a solid knowledge of modern mobile app development using Kotlin, Jetpack Compose, Clean Architecture, high standards, and the latest trends in Android technology's stack. Digging into business problems is a crucial part of my approach. I believe in architecting solutions that not only meet immediate technical needs but also align with the business goals of the organization. I've built numerous Android apps from scratch and led the development that allows me to choose the right architecture and technologies that prioritize not just the functionality but the performance, and quality that contribute to a superior user experience, and achieve business goals. Each project for me is an opportunity to go beyond the conventional, delivering solutions that stand out in terms of both creativity and technical excellence. Important highlights of my work: • Most Mobile apps in my portfolio are built from scratch by me where I was a leading engineer. • My response time is 1 hour maximum. I am always in touch. • I know how to achieve a 99.9% crash-free rate. • I was elevating the app rating from 2.8 to 4.6 stars out of 5 in Google Play. • I am not an agency, I am doing 100% work in person. • I provide efficient work and I am able to replace a small mobile team. • My hourly rate is negotiable. Feel free to suggest your rate. I am passionate about staying up-to-date with the latest Android trends and technologies (including Kotlin, Jetpack Compose, Firebase, and Material Design) to ensure that every project I work on is innovative and tailored to meet the client's specific needs. My technical skills: • Programming languages: Kotlin, Java, SQL. • Tools: Kotlin coroutines, RxJava, Retrofit, Apollo GraphQL, Dagger/Hilt, Room, Android architecture components. • Frameworks: Android, Jetpack Compose, Firebase, Facebook, AdMob, Google Maps, Segment, Iterable, Apollo GraphQL. • Architecture: Multi-modular, Clean, MVP, MVI, MVVM • Environments: Android Studio, JIRA, Confluence, Youtrack, Git, Jenkins. • Methodologies: Agile, Scrum, Kanban • CI: Bitrise, Jenkins • VCS: Github, Gitlab, Bitbucket • Image loading and caching: Picasso, Glide, Coil. • Unit tests: JUnit, Mockito, Robolectric. • Other: Team leadership, Code review, Scrum master, Consultant, Mentor. Let's collaborate to bring your mobile app ideas to life and make them stand out in the competitive app market.Code RefactoringMaterial DesignReact NativeFlutterGraphQLUser Profile CreationIn-App PurchasesGoogle AnalyticsSwiftiOS DevelopmentiOSAndroid App DevelopmentAndroidFirebaseKotlinNative App Development - US$50 hourly
- 5.0/5
- (9 jobs)
Full-stack React, NodeJS, Python developer, Tech-Lead, Team-Lead, Architect. 9 years of experience, including real experience with AWS (EC2, S3, Lambda, RDS etc), High-Load, Big Data and Machine Learning Some of techs I've worked with: Javascript / NodeJS (6+ years), Python (6+ years), PHP (7 years), React, Redux, Flask, Loopback, Symfony, MongoDB, SQL, Machine learning, OOP, Functional Programming, Reactive Programming.Code RefactoringAmazon S3JavaScriptPHPAWS LambdaAmazon ECSReactMongoDBNode.jsSQLMachine LearningPython - US$18 hourly
- 4.9/5
- (22 jobs)
I have great experience in building as a small and a big distributed high load applications. I can create to you high-quality and stable application using new technologies. Technical skills React | ASP.NET Core + MVC | Blazor | C# | VB | Web Forms | WPF | JSON/REST API |Angular 2+ | Web Services | Micro services | Bootstrap | Telerik controls | Kendo UI | Ionic Framework | Xamarin cross-platform | LINQ | jQuery | JavaScript | Knockout.JS | HTML5 | Bootstrap Database: - SQL Server - No-SQL (Dynamo Db, Azure Cosmos Db and MongoDB) - MySQL - Oracle Db - Ms Access - Compact DB - Entity Framework VERSION CONTROL TOOLS: - SVN - GitHub - Bit Bucket ISSUE MANAGEMENT TOOLS: - Azure Dev Ops - AWS Dev Ops - Atlassian-JIRA - Connect Wise - Wrike DEVELOPMENT TOOLS: Visual Studio 2022Code RefactoringReactBlazorUnit TestingMicrosoft OutlookGitHubRESTful APIWindows Presentation FoundationASP.NET CoreC#SQLMicrosoft SQL Server CompactOracle NoSQL DatabaseAzure DevOpsASP.NET MVCMicrosoft IIS - US$125 hourly
- 4.9/5
- (93 jobs)
I’m not just a pixel pusher, I’m the pixel kingpin. The ace up your sleeve, the secret sauce to your digital steak. I’m the one they whisper about in tech corridors, the name dropped at board meetings, the game-changer your brand's been thirsting for. I'm the digital craftsman the reviews rave about, with clients singing praise so high, which I’m truly grateful for. From the “That's my guy” to “He's the best ever and I’m super picky,” to the life-saving “You did such an amazing job. If you ever need a kidney, Hit me up!” It's safe to say, I leave a memorable impression. However, little Justin wasn't born with a silver mouse in hand. Oh no, my early days were a comical struggle with color palettes and pixel grids. Back in the day downloading Photoshop felt like defusing a bomb with a stopwatch ticking down. I have now dedicated over 50,000 hours of my adult life to this craft, and as a result, I’m the conductor, producer, writer, and the one who plays all the instruments in this digital orchestra. Some call it obsession, I call it passion. I’m not just a secret weapon, I’m the entire arsenal. The go-to guru to elevate your brand, the light that brings clarity to your digital vision. Let's create not just a website, but a web sensation. Let's not just get you online, but on top. And let's not just catch eyes, but capture hearts and minds. Your digital renaissance begins now. Are you ready to be unforgettable?Code RefactoringGoogle My Business OptimizationLanding Page OptimizationWeb DesignSoftware DesignFigmaUser Interface DesignPage Speed OptimizationWordPress DevelopmentPHPWordPressJavaScriptWooCommerceCSS - US$30 hourly
- 4.6/5
- (71 jobs)
I am a versatile and accomplished developer with a broad skill set. My strengths encompass a wide range of technical areas, including: Mobile App Development: Proficient in iOS app development using Swift, SwiftUI, and Objective-C, as well as Android app development with Java and Kotlin. I excel at creating native mobile apps that offer exceptional user experiences on both major platforms. Cross-Platform Development: Experienced in cross-platform mobile app development using technologies such as React Native (JavaScript and TypeScript) and Flutter (Dart). This expertise enables me to efficiently build apps that work seamlessly on iOS and Android. Full Stack Development: Skilled in full-stack web development, I am well-versed in using PHP, Laravel, Node.js, React.js, AngularJS, TypeScript, and various databases like MySql, MongoDB, and Firebase. This allows me to create robust and feature-rich web applications from end to end. Blockchain Development: With a strong foundation in blockchain technology, I can design, develop, and implement blockchain-based solutions for various applications. My career has been marked by successful projects, and I bring my extensive experience to every new endeavor. I hold [mention your highest level of education and any relevant certifications, if applicable]. I am eager to take on new challenges, deliver outstanding results, and contribute to innovative projects that benefit from my diverse skill set. Let's collaborate to bring your ideas to life and drive success.Code RefactoringGenerative AIBlockchainMobile UI DesignGraphic DesignSmart ContractPythoniOS DevelopmentMobile App DevelopmentReact NativeSwiftObjective-CKotlinJavaAndroid App DevelopmentFlutter - US$40 hourly
- 4.6/5
- (122 jobs)
✅ Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 by Upwork (𝗧𝗼𝗽 𝟯%) ✅ 13,000+ hours and still counting ✅ 122+ jobs completed successfully ✅ 100% Job Success (Client Satisfaction Ratio) ✅ High-Quality Work ✅ Budget-friendly ✅ Fluent English Hello! I’m a seasoned mobile app developer with over 12 years of experience in creating robust, user-friendly applications for both iOS and Android platforms. My expertise spans native development using Swift and Kotlin, as well as cross-platform frameworks like React Native and Flutter, enabling me to deliver high-quality solutions tailored to your needs. 𝗪𝗵𝗮𝘁 𝗜 𝗢𝗳𝗳𝗲𝗿: ➳ 𝗡𝗮𝘁𝗶𝘃𝗲 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Leveraging the full capabilities of iOS and Android, I create seamless and efficient apps that meet the highest performance standards. ➳ 𝗖𝗿𝗼𝘀𝘀-𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: Using technologies like React Native and Flutter, I build applications that save time and resources while providing a native-like experience across devices. ➳ 𝗨𝗜/𝗨𝗫 𝗗𝗲𝘀𝗶𝗴𝗻: I believe that a great app is not just functional but also visually appealing. I collaborate closely with clients to design intuitive user interfaces that enhance user engagement. ➳ 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: I have extensive experience integrating various APIs, ensuring smooth functionality and data exchange for your applications. ➳ 𝗠𝗮𝗶𝗻𝘁𝗲𝗻𝗮𝗻𝗰𝗲 & 𝗦𝘂𝗽𝗽𝗼𝗿𝘁: My commitment doesn’t end at launch. I provide ongoing support and maintenance to keep your app up-to-date and running smoothly. 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? ➳ Proven track record of successful app launches across diverse industries. ➳ Strong problem-solving skills and a keen attention to detail. ➳ Excellent communication and collaboration to ensure your vision comes to life. ➳ A client-centric approach, where your satisfaction is my top priority. 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: ✨ Java, Kotlin, Objective C, Swift, Flutter, JSON, XML, Web Services ✨ React Native, Redux, TypeScript, Saga, Axios, Xamarin ✨ PHP, Laravel, NodeJS, Firebase, OrientDB, MongoDB, NoSQL, GraphQL ✨ MVC, MVVM, MVP, Viper design pattern ✨ Excellent Interpersonal skills, outstanding problem-solving skills ✨ Backend: Firebase, Firestore, GraphQL etc ✨ Apple Developer Portal, iTunes Connect activities like managing Apple Certificate and Device profile for Development, Ad-Hoc, and Distribution ✨ iOS SDK, Cocoa-Touch, Xcode, Strong Debugging and troubleshooting skills. Having robust technical knowledge and professional experience in iOS & Android Application Development. Also, I have experience in a wide variety of business applications with quality of code, User-Interface Development, Web Service Integration, and 3rd Party SDK Integration. 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗠𝗼𝗯𝗶𝗹𝗲 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆: ➳ Application Architecture design ➳ SDK Development: iOS, Android & JavaScript ➳ BLE based apps ➳ Cloud servers such as Parse, Amazon, FireBase, iCloud ➳ Creating custom user-interaction components ➳ Apple Push Notification ➳ Integrating Web Services and APIs ➳ Integrating, using new iOS framework and 3rd Party SDKs and Components ➳ Application Distribution Process through iTunes Connect ➳ Social Networking (Facebook, Twitter, LinkedIn, Flickr, Youtube, Instagram) ➳ GPS, Google Maps, Location Tracking ➳ Photo, Video manipulation (GPUImage, OpenCV) ➳ Map Kit (Google Map, MRMapKit, Navigation and Tracking) ➳ Mobile Ads: iAds / AdMob / Flurry / GAD/ Interstitial Ad Ask for your free 60-minute initial consultation session!Code RefactoringReduxJSONWebsocketsRedux SagaAndroid App DevelopmentiOS DevelopmentFlutterReact NativeFirebasePush NotificationsGraphQLDartObjective-CSwiftSQLite - US$50 hourly
- 4.4/5
- (141 jobs)
Greetings! My name is Sergii, and I’m a Xamarin Certified Mobile App Developer with more than 6 years of experience. I started my way in web and mobile development back in 2012 as a Casual Game Developer working for FIVE-BN (Alawar Division), and gathered some beneficial knowledge on how to create game logic, optimizing game performance, game deployment, and bug fixing. Later on, I have worked as a C# Developer in SoftReactor LLC, where I’ve gained and polished my skills related to ASP.NET Core, C#, MySQL, WPF, XAML. At almost the same time, I’ve started my own company - HeadWorks, where till present days my team and I have been creating web, mobile, hardware (embedded) projects, helping other companies to implement and convert their ideas into reality. In 2014 I’ve discovered Xamarin and incorporated it into what I have been doing - cross-platform mobile applications for iOS and Android. The tech-stack and skills I have acquired: - Cross-platform mobile app development using Xamarin: Xamarin.Forms, Xamarin.Native (Android, iOS), MVVM, Prism, MVVM Cross, MVVM Light, MVVM Fresh, ReactiveUI, AJAX - Creating complex enterprise-level custom solutions using C#, C++, MySQL, ASP.NET MVC, .NET Framework (CLR), .NET Core (CoreCLR), .NET GC, Azure, REST API, Web API, Google Maps API, Twitter API - Front-end development: HTML, CSS, JS, Angular - Facebook SDK, Visual Studio - Version control systems: Git, Github, SVN - iBeacons, Eddystone (estimote, kontakt.io) - Payment processors (Stripe, PayPal, Apple Pay, Webmoney, Yandex.Money) - Analytics and crash analytics (HockeyApp, Microsoft Insights, Firebase) I have recently started acquiring new skills on Objective-C, Swift, Java, Xcode and am planning on concreting the knowledge in the future. I’m open to everything new in the world, love to learn and prove myself, so all your queries and projects are greatly appreciated, and I’m ready to support you around the clock. I’ve been working with both individual clients, private and public companies (enterprise clients) and have helped them to bring their business ideas, thoughts, projects into life. Hesitation is the enemy of success, so send me the message, and let’s get your project into shape!Code RefactoringXAMLMobile UI DesignUser Experience DesignAndroid App DevelopmentMobile App DevelopmentiOS DevelopmentXamarinAndroidC# - US$24 hourly
- 4.8/5
- (104 jobs)
𝗘𝘅𝗰𝗲𝗲𝗱𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗰𝘁𝗮𝘁𝗶𝗼𝗻𝘀, 𝗘𝘅𝗲𝗺𝗽𝗹𝗶𝗳𝘆𝗶𝗻𝗴 𝗘𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 – 𝗬𝗼𝘂𝗿 𝗨𝗹𝘁𝗶𝗺𝗮𝘁𝗲 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻! ✧✧ 𝐈'𝐦 𝐚 𝐒𝐫. 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐢𝐭𝐡 𝟏𝟎𝟎% 𝐉𝐒𝐒, 𝟐𝟎𝟎𝐊+ 𝐔𝐒𝐃 𝐞𝐚𝐫𝐧𝐢𝐧𝐠𝐬, 𝐚𝐧𝐝 𝐰𝐨𝐫𝐤𝐞𝐝 𝟏𝟏,𝟎𝟎𝟎+ 𝐡𝐨𝐮𝐫𝐬 𝐨𝐧 𝟏𝟎𝟎+ 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬. Are you seeking a Full-Stack Developer with a proven track record of delivering top-tier solutions? Look no further! With over a decade of hands-on experience, I bring expertise to the table, poised to elevate your projects to new heights. My paramount focus is on fostering enduring client relationships while consistently delivering top-notch quality work. ✔️ 𝐒𝐤𝐢𝐥𝐥 𝐒𝐞𝐭𝐬: 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐒𝐭𝐚𝐜𝐤: 𝟏. .𝐍𝐄𝐓 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: ✅ Languages: C#, VB.NET ✅ Frameworks: ASP.NET MVC/Core, Entity Framework, Blazor ✅ Databases: SQL Server, MySQL, SQLite, Vector Database ✅ Web Services: ASP.NET Web API, WCF, SOAP API, Microservices ✅ Mobile Development: Xamarin ✅ Cloud Platforms: Microsoft Azure, AWS, GCP ✅ Version Control: Git, GitHub, Bitbucket ✅ Testing: NUnit, xUnit, MSTest, Selenium ✅ DevOps: Azure DevOps, Docker, Kubernetes ✅ Design Patterns: MVC, MVVM, Dependency Injection ✅ Security: Authentication, Authorization, JWT ✅ Agile Methodologies: Scrum, Kanban 𝟐. 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐒𝐭𝐚𝐜𝐤: ✅ Frameworks: Express.js, Nest.js ✅ Web Services: RESTful APIs, GraphQL 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐒𝐭𝐚𝐜𝐤: 𝟏. 𝐀𝐧𝐠𝐮𝐥𝐚𝐫: ✅ Angularjs ✅ Angular Version 2 - 17 ✅ NgRx, Interceptor ✅ Code Coverage, Jasmine, Karma ✅ Web Technologies: HTML5, CSS3, JavaScript ✅ Bootstrap for UI ✅ IndexDB integration for efficient data storage. 𝟐. 𝐑𝐞𝐚𝐜𝐭: ✅ Version 16.x - 18.x ✅ Redux, React Router ✅ Context API, Code Splitting ✅ Virtual DOM, React Hooks ✅ Jest and Enzyme for testing ✅ HTML5, CSS3/LESS/SASS/SCSS, ES6+ JavaScript ✅ Responsive design using Bootstrap. ✔️ 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? 𝟭. 𝗨𝗻𝗺𝗮𝘁𝗰𝗵𝗲𝗱 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: With 10+ years of mastery in .NET, Angular, Node, and React, I am your go-to expert for crafting cutting-edge solutions tailored to your unique requirements. 𝟐. 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐏𝐫𝐨𝐰𝐞𝐬𝐬: From backend intricacies to frontend finesse, I excel in every facet of development, ensuring holistic solutions that leave no stone unturned. 𝟑. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐓𝐫𝐚𝐢𝐥𝐛𝐥𝐚𝐳𝐞𝐫: Stay ahead of the curve with my adeptness in the latest technologies, including .NET Core 8.0, Angular version 17, Node version 18, and React version 18. 𝟒. 𝐒𝐞𝐚𝐦𝐥𝐞𝐬𝐬 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Whether it's Azure Functions, AWS Lambda, or Docker Hub, I seamlessly integrate cloud services and containerization for unparalleled scalability and agility. 𝟓. 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐜𝐞: Jasmine, Karma, Jest – I leverage industry-leading testing frameworks to ensure bulletproof code quality and reliability, every step of the way. 𝟔. 𝐂𝐥𝐢𝐞𝐧𝐭-𝐂𝐞𝐧𝐭𝐫𝐢𝐜 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧: Your vision, my mission – I prioritize your needs, ensuring transparent communication, timely delivery, and unparalleled satisfaction throughout our collaboration. 𝟕. 𝐓𝐨𝐩-𝐑𝐚𝐭𝐞𝐝 𝐂𝐫𝐞𝐝𝐞𝐧𝐭𝐢𝐚𝐥𝐬: Join the ranks of satisfied clients who have benefitted from my expertise. With a stellar track record and rave reviews, I consistently rank among the top freelancers on Upwork. 𝟖. 𝐃𝐢𝐯𝐞𝐫𝐬𝐞 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨: I've worked in diverse sectors including healthcare, e-commerce, and fintech, delivering tailored solutions in each. My expertise spans across industries, ensuring versatile and effective project outcomes. ✔️ 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲: I am currently available for new projects and collaborations. My schedule is flexible, allowing me to accommodate various time zones and project requirements. Let's discuss your needs and find a mutually convenient arrangement to kickstart our collaboration. ✔️ 𝐋𝐞𝐭'𝐬 𝐂𝐫𝐞𝐚𝐭𝐞 𝐒𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐄𝐱𝐭𝐫𝐚𝐨𝐫𝐝𝐢𝐧𝐚𝐫𝐲: Embark on a journey of innovation and success with a Full-Stack Developer who goes above and beyond to exceed your expectations. Together, let's turn your vision into reality – one line of code at a time.Code RefactoringChatGPTOpenAI APINodeJS Framework.NET CoreMongoDBAngular MaterialAzure DevOpsTypeScriptJavaScriptNode.jsReactAngularASP.NET MVCASP.NETC# - US$70 hourly
- 4.7/5
- (100 jobs)
10+ years of freelance product & project management for PCB design and layout, firmware programming, and rapid prototyping. Here is a non-exhaustive list of relevant software/protocols/chipsets: - Strong C++, C, and C# - PCB layout and schematic capture with Altium, Cadence, Eagle, etc., with multilayer, flexible, high-speed embedded systems - FPGA programming with Verilog/VHDL: Altera Quartus, Xilinx, iCECube - Experience with low-cost MCU/single-board prototyping platforms: Arduino, Beaglebone, Raspberry Pi, NanoPi, etc. - ARM: ATSAM, STM32, PIC32, A13, FreeScale, MSP, NXP - MPU: Pic33F/18F/16F, Atmega 80251, 8052, 8951, 8051, 16, 32, 128 - Digital interfaces and wireless transmission: UART, I2C, SPI, BLE, BT, GSM/GPRS/GPS, xBee, ZigBee (particular experience with BLE HM10, HC05, ESP32, DA14508, nRF52832, 52840, BlueNRG) I also have a background in mechanical engineering and industrial design; I can implement my work into fully realized products for you. Expect me to help your business as if I am growing my own.Code RefactoringMicrocontroller ProgrammingESP32Core BluetoothPower ElectronicsComputer Hardware DesignFirmwarePCB DesignWireless CommunicationLED PhysicsElectronic Circuit DesignRapid PrototypingAltium Designer - US$40 hourly
- 5.0/5
- (49 jobs)
✅ Top-Rated Freelancer with a proven track record of success. 💻 ✅ Achieved a 100% job success score by delivering exceptional results. 💯 ✅ Received over 10+ ⭐⭐⭐⭐⭐ 5-star reviews from satisfied clients. I am a highly skilled and experienced Senior WordPress Developer with over 8+ years of expertise in WordPress Development. My passion lies in transforming your ideas into fully secured, SEO-friendly, responsive, and interactive WordPress websites. 📁 My extensive experience covers the following areas: - Theme and Plugin Development: Proficient in creating custom themes and plugins tailored to meet your unique requirements. - Premium Theme Development for Themeforest (Envato): Skilled in developing high-quality themes for the popular Themeforest marketplace. - WordPress Deep Optimization and SEO: Expertise in optimizing WordPress websites for improved performance and search engine visibility. - WordPress Security: Ensuring robust security measures to protect your website from vulnerabilities. - WordPress Refactoring: Capable of enhancing the codebase and improving the efficiency and maintainability of WordPress projects. - WordPress Installation, Configuration, Backup, and Migration: Proficient in handling all aspects of WordPress setup and management. - Page Builders (Elementor | Visual Composer / WPBakery | King Composer): Experienced in utilizing popular page builders to create stunning and user-friendly layouts. - ACF | Metaboxes: Skilled in implementing Advanced Custom Fields and metaboxes for enhanced content management. - Woocommerce: Expertise in building e-commerce websites using the powerful Woocommerce platform. - WordPress AMP: Knowledgeable in implementing Accelerated Mobile Pages (AMP) for faster loading on mobile devices. - Gutenberg: Proficient in working with the Gutenberg editor to create engaging and dynamic content. - bbPress / BuddyPress: Experienced in setting up and customizing community forums and social networking sites. - Mailchimp: Capable of integrating Mailchimp for seamless email marketing campaigns. - API Integrations: Skilled in integrating various APIs, such as Amazon Product Advertising API, eBay Browse API, Facebook/Instagram/Twitter/Mailchimp, Google API, Envato API, Unsplash API, Github API, and more. If you have an idea in mind, I am here to listen and bring it to life. Let's discuss your project today! 📩Code RefactoringWordPress Malware RemovalWordPress Website DesignWordPress MigrationWordPress SecurityWordPress Landing PageWordPress InstallationWordPress CustomizationWordPress OptimizationWordPress DevelopmentWordPress e-CommerceWordPress Bug FixWordPress WebsiteWordPress PluginWordPress ThemeWordPress - US$35 hourly
- 5.0/5
- (1 job)
Proficient creating Python desktop apps and scripting, using popular Python frameworks and libraries including: - PyQt/Tkinter - Flask - openpyxl - pandas Web frontend development using: - HTML - JavaScript - CSS - SvelteCode RefactoringSQLHTMLCSSPyQtGUI DesignSvelteFlaskBashMatplotlibBash ProgrammingPythonC++GitLinuxJavaScript - US$50 hourly
- 5.0/5
- (17 jobs)
I'm a Unity Developer with 12 years of experience. Lots of experience in developing mobile games from the beginning until the end. Super clean and readable code! Strong points: - Gameplay - SQL (databases) - Bug fixes - Full stack Hit me up, if you are interested or need more information about me!Code RefactoringGame DevelopmentVideo GameGameUnity Want to browse more freelancers?
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