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  • $60 hourly

    • 5.0/5
    • (25 jobs)
    Hello! I'm Tami Mitchell, a seasoned freelance software engineer with over a decade of experience, specializing in Ruby on Rails and modern JavaScript frameworks like React and Next.js. I thrive in dynamic environments, delivering high-quality, scalable, and performance-optimized web solutions. Strengths and Skills: Expertise in Web Development: Proficient in Ruby on Rails, React, Mapbox, AWS, and serverless technologies. Project Leadership: Successfully led website rebuilds for notable clients such as clockshark.com and safetychain.com, migrating to high-performance serverless stacks. Collaborative Team Player: Experienced in Agile/Scrum environments, ensuring smooth workflows and effective communication across project teams. Problem Solving: Exceptional at diagnosing and solving complex technical issues, ensuring robust and maintainable web applications. Accomplishments: Rebelle Rally Performance Tracker: Developed an innovative off-road asset tracking system using Arduino and AWS IoT, enhancing real-time data visualization with React and Mapbox. Roadpass Digital Enhancement: Played a key role in modernizing the Campendium.com platform, implementing cross-brand authentication and improving site performance and scalability. Education and Training: A solid foundation in technical education, continuously updated with the latest web technologies and best practices through ongoing professional development. I am eager to bring my technical acumen and problem-solving skills to your next project, ensuring it exceeds expectations while pushing the boundaries of technology. Let's create something great together! Feel free to reach out for a detailed discussion on how I can help your business thrive!
    Featured Skill iPhone App Development
    Swift
    iOS Development
    Internet of Things
    Serverless Computing
    Mapbox
    Elementor
    Next.js
    Landing Page
    Web Design
    Ruby
    Ruby on Rails
    JavaScript
    WordPress
    React
  • $120 hourly

    • 5.0/5
    • (24 jobs)
    I build products that are easy for users to understand. I work quickly, as I believe most progress is made during iteration, after user/client feedback. By choosing me as your developer, your project will get done sooner than you think. I pride myself in being an extraordinarily fast developer while still maintaining high-quality standards.
    Featured Skill iPhone App Development
    NoSQL Database
    Angular Material
    Website
    Entity Framework
    ASP.NET Core
    ASP.NET Web API
    App Development
    Git
    User Interface Design
    iOS Development
    TypeScript
    iOS
    Android
    Firebase
    Ionic Framework
    Mobile App Development
    Angular
  • $94 hourly

    • 4.9/5
    • (16 jobs)
    I develop high quality iOS and Android mobile apps using Swift, Kotlin, Java, SwiftUI, Jetpack Compose, Firebase, and APIs as needed depending on project. Through my hard work and dedication to meet all project requirements, I've earned Upwork's Top Rated Plus rating! I am self-motivated, self-directed, dependable, reliable, and trustworthy. I've been an independent consultant for most of my career. I know how to conceive a project, get the work done independently, and successfully deliver the project. I excel at testing so when the project is done, it is done! No one likes to put together a large programming team where there are tons of duplicated effort and miscommunication. I can be your single-source developer for both Android and iOS phones and tablets! Most apps also need a back-end. No need for a separate web app programmer that can cause timeline problems and miscommunication! I can write the back-end utilizing Firebase then integrate it into all versions of your mobile app. Using a single source, you control the timeline, you avoid integration issues, and everything flows smoothly. You probably cut your delivery time in half! Every week, I develop mobile apps, cloud functions, and cloud tasks, mainly for Internet of Things using Bluetooth and Firebase. Every week, I am using: Kotlin Java Javascript, typescript, node.js (back-end) Swift Jetpack Compose SwiftUI Bluetooth (Android) Core Bluetooth (iOS) Firebase Auth (user authentication, login) Firebase Firestore (database) Google Cloud Functions Google Cloud Tasks (scheduled based on a trigger) Firebase Crashlytics Firebase and Apple push notifications Google sign-in Apple sign-in As an expert Mobile App Developer, other skills I can deliver: Flows, co-routines, async tasks, flow state. WiFi configuration: static IP, dns, enterprise, add and update. JSON serialization/parcelization. NFC tag reading. Develop Maven library. Network Service Discovery (NSD). Direct ipp open protocol for printers. REST - okhttp and retrofit expert for network calls, including calls to Amazon AWS. User accounts with encryption tokens. Encrypted keystore. Push notifications (Firebase, Apple, in-app). Silent package Installer and updater. Kiosks management. Google maps with location updates, custom map markers, annotated map markers. Custom User Interface features with custom graphics, backgrounds, themes, and styling. User authentication. Credit card validation. Stripe credit and debit card processing. Google Pay processing. Glide or Picasso image handling/transformation. Image upload as file or bitmap. Dark mode activation. Launch and welcome screens with terms of service. Multi-threaded environment solutions and multi-tasking co-routines. Dynamic updates of screens from incoming push notifications. Phone dial, messaging, camera photo-taking, gallery browsing. Backwards compatibility to older versions of Android. Forwards compatibility to latest versions of Android. Room database. App publishing on Google Play Store and Apple App Store. App testing on Firebase. Firebase/Maps API keys. Troubleshooting and expert debugging of crashes/bugs/memory leaks in legacy apps. Development environment: Gradle multi-flavor (multi-version) builds Github and bitbucket version control Slack or Jira team communication Figma wireframes Swagger REST API calls Github or Jira project management and collaboration Roll-outs to 50 million user install base A recent review on Upwork: "Stephanie did a superb job to make our Bluetooth hardware on-boarding via Android very reliable. She was able to find the corner cases and then find solutions for those corner cases! This was a difficult challenge as Bluetooth permissions, capabilities, and processes vary greatly between Android OS versions and devices. The on-boarding process is simple, elegant, and extremely user friendly. It has been an honor and pleasure working along side Stephanie." Other: Protocol Stacks, embedded systems, multi-tier networking systems Fortune 500 Java and C/C++ Trainer, Expert Witness Computer Science degree, Certified Project Management Professional Native English Speaker Available to work any timezone Background: I've used many protocol stacks: Point-to-point, TCP/IP, sockets, WiFi CDMA network, Bluetooth, other wireless networks. I've developed application systems with 4 tiers of communication layers: Device to Handheld, Handheld to PC, PC to mini-computer, mini-computer to mainframe. Embedded Systems: Transponder readings sent to handheld which then transferred data to desktop computer which interfaced to IBM mainframe. Cable system "set-top" box. Assembly code for micro-chips. Veriphone credit card readers with communication to mainframes/cloud. Java Trainer for Sun Microsystems (before they were bought out by Oracle) for 2 years. C/C++ Trainer for Intel University (part of Intel) for 2 years. Expert Witness in trial against a top insurance provider regarding their Java based application.
    Featured Skill iPhone App Development
    Software Debugging
    Database
    API Integration
    Java
    Swift
    Push Notifications
    Firebase
    Android
    iOS Development
    Firebase Cloud Firestore
    RESTful API
    Android App Development
    Kotlin
    Bluetooth
    JetPack
  • $40 hourly

    • 4.8/5
    • (161 jobs)
    With over 𝟏𝟐 𝐲𝐞𝐚𝐫𝐬 of expertise in 𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 and 𝐜𝐥𝐨𝐮𝐝 𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠, I bring a proven track record of delivering cutting-edge solutions that exceed client expectations. My dedication to excellence is reflected in my 𝐓𝐨𝐩-𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 status on Upwork, where I’ve logged 5,200+ hours and earned over $500K+ while maintaining a 100% job success score. 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? ➜ Proficient in frameworks like 𝐑𝐞𝐚𝐜𝐭, 𝐀𝐧𝐠𝐮𝐥𝐚𝐫, and 𝐕𝐮𝐞.𝐣𝐬, coupled with back-end technologies such as 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐄𝐱𝐩𝐫𝐞𝐬𝐬, and 𝐌𝐨𝐧𝐠𝐨𝐃𝐁. ➜ Extensive experience with 𝐀𝐖𝐒, 𝐀𝐳𝐮𝐫𝐞, and 𝐆𝐨𝐨𝐠𝐥𝐞 𝐂𝐥𝐨𝐮𝐝 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦, helping businesses scale efficiently with secure and optimized cloud solutions. ➜ Skilled in 𝐃𝐨𝐜𝐤𝐞𝐫, 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬, 𝐉𝐞𝐧𝐤𝐢𝐧𝐬, and other tools to automate and enhance CI/CD pipelines, ensuring seamless deployment and maintenance. 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐫𝐢𝐧𝐠 𝐭𝐨 𝐭𝐡𝐞 𝐓𝐚𝐛𝐥𝐞: ➜ I prioritize understanding your unique needs to deliver solutions, ensuring projects are completed on time and within budget. ➜ As a continuous learner, I stay ahead of the curve by mastering the latest technologies and trends. ➜ Whether it’s a high-performance web app or cloud infrastructure, I guarantee results that align with your vision and goals. 𝐋𝐞𝐭’𝐬 𝐁𝐮𝐢𝐥𝐝 𝐒𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐆𝐫𝐞𝐚𝐭 𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫! Looking for a reliable and skilled partner to transform your ideas into reality? I’m here to help. Whether it’s developing scalable applications, optimizing cloud architecture, or implementing DevOps solutions, I am ready to deliver. 🚀 Let’s connect to bring your vision to life with powerful, innovative, and high-performing solutions. Keywords: Full-Stack Developer, Cloud Engineer, AWS, Azure, Google Cloud, React, Angular, Vue.js, Node.js, MongoDB, DevOps, Docker, Kubernetes, Jenkins
    Featured Skill iPhone App Development
    SQL
    Deep Learning
    Conversion Rate Optimization
    Machine Learning
    Android App Development
    iOS Development
    In-App Advertising
    PHP
    Java
    Node.js
    Flutter
    React Native
    Amazon Web Services
    Swift
    Firebase
    Native App Development
  • $100 hourly

    • 5.0/5
    • (6 jobs)
    20 years of industry experience in quality assurance, web programming and mobile application development. I currently specialize in performance and load testing using JMeter. I test REST based APIs to set baseline statistics and monitor changes with automated test projects.
    Featured Skill iPhone App Development
    iOS Development
    SOAP
    Mobile App Development
    RESTful API
    Web Service
    Linux System Administration
    RESTful Architecture
    Automated Testing
    Performance Testing
    Apache JMeter
    Load Testing
    Python
  • $999 hourly

    • 4.9/5
    • (0 jobs)
    I'm an experienced mobile software engineer (4.5 years thus far) with plenty of my own apps and client apps available on the App Store. I have worked at startups and agencies for the bulk of my career, and I'm very used to delivering software in a professional environment. You should hire me because you can call me up and talk to me on the phone like a normal human being. We can do screen sharing as well. There's no language barrier, and my writing skills are fantastic. I was a freelance writer before I became a full time software engineer. Another reason you should hire me: I have successfully launched apps, and I have the numbers to prove it. I know what kind of development timeline you'll need for your project, how to deal with Apple, and best of all, how to design a product so people will actually use it. Apps I've worked on (Search for them on Google/iTunes) - Skate Dice: Skateboarding - Track - Simple Time Tracking & Invoicing - SoapBox Social
    Featured Skill iPhone App Development
    Mac OS App Development
    iPad UI Design
    iPhone UI Design
    App Marketplace
    iPad App Development
    Apple Xcode
    iOS Development
    Swift
    Objective-C
  • $60 hourly

    • 5.0/5
    • (1 job)
    Dedicated and accomplished Senior iOS Developer with extensive experience in Swift, Obj-C, UIKit, and SwiftUI. Seeking a challenging iOS Developer position to leverage my expertise in developing high-quality, user-centric mobile applications and to contribute to innovative projects in a dynamic, collaborative environment. Over 5 years of experience in iOS development, with deep expertise in Swift, Storyboards, Obj-C, UIKit, SwiftUI, CoreData, CloudKit, iPadOS, macOS, watchOS, tvOS, and most Apple Kits. Proven track record of delivering high-quality iOS applications on time and within budget, by effectively collaborating with cross-functional teams. Strong analytical and problem-solving skills, with a focus on optimizing performance and enhancing user experience. Proficient in full-stack development, including backend integration and API development, with hands-on experience in AWS. Committed to continuous learning and staying updated with the latest technologies and industry trends. Highly motivated, with excellent communication skills and a passion for building valuable products that meet user needs.
    Featured Skill iPhone App Development
    Git
    AWS Lambda
    Firebase
    UX & UI Design
    UIKit
    OpenAI API
    Core Data
    iPadOS
    macOS
    SwiftUI
    Swift
    Mobile Device
    iOS Development
    Czech to English Translation
    Translation
  • $70 hourly

    • 4.5/5
    • (51 jobs)
    * IOS & Android Expert : Games & Business Apps * Website Development & Landing Pages * Social Media Manager: Blogs, Instagram, Facebook, Twitter, Linkedin Expert * Brand Growth & Recognition * Website Traffic: Social, PPC, Organic * Graphic Designer * ARKit, Rest API, MVC, MVVM, Socket Implementation, Third-party SDK, Cocoapod, Zeplin, Analytics, Data encryption, and decryption, Sqlite 3, Core Data. * Social media SDK integration Unity project integration and communication (ARKit) Augmented reality real-world integration with video recording Socket programming with UDP and TCP connection
    Featured Skill iPhone App Development
    Augmented Reality
    ARKit
    Flutter
    Swift
    MVC Framework
    English
    Marketing Strategy
    iOS Development
    Social Media Marketing
    Android App Development
  • $75 hourly

    • 0.0/5
    • (0 jobs)
    I’m a developer with experience in building websites for small and medium sized businesses. Whether you’re trying to win work, list your services or even create a whole online store – I can help! I’m experienced in HTML and CSS 3, Javascript, Reactive websites, Server-side maintenance I’ll fully project manage your brief from start to finish Regular communication is really important to me, so let’s keep in touch!”
    Featured Skill iPhone App Development
    React Native
    API Development
    App Development
    iOS Development
    Web Development
    React Bootstrap
    CSS 3
    JavaScript
    React
  • $60 hourly

    • 0.0/5
    • (0 jobs)
    Software engineer looking to help clients find their vision for a great app and/or website. I have years of experience on both the backend and frontend.
    Featured Skill iPhone App Development
    Web Design
    Mobile App Design
    App Icon Design
    App Feature Development
    App Design
    Android App Development
    iOS Development
    Smartphone
    Product Development
    Web Development
    Web Application
    App Development
  • $120 hourly

    • 0.0/5
    • (0 jobs)
    As a skilled software engineer with over 10 years of experience, I'm excited to offer my services as a freelancer in software and graphic design. With a strong background in cloud computing, DevOps, and machine learning, I can help businesses solve real-world problems and drive growth. My expertise includes programming languages such as PHP, JavaScript, and Python, as well as development frameworks like Laravel, Magento, and React. In addition to software expertise, I also have a passion for graphic design and can help clients with visual branding and creative projects. My unique blend of technical and soft skills has taught me the importance of effective communication, teamwork, and time management. If you're looking for a reliable and innovative freelancer to help with your software or graphic design needs, let's discuss how I can contribute to your success. Software expertise: DevOps, machine learning, cloud computing, PHP, JavaScript, Python, Laravel, Magento, React Graphic design skills: branding, visual design, creative projects Soft skills: communication, teamwork, time management, problem-solving
    Featured Skill iPhone App Development
    Vue.js
    PHP
    Web Development
    Graphic Design
    React
    Python
    Linux
    Software Development
    iOS Development
    App Development
    Web Application
    Ecommerce
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    Over 35 years of experience in the computer industry. Advanced skills in languages such as Java ,C/C+ and, C#. Also, used Perl and other scripting languages. Operating systems such as Windows, UNIX/Linux, and MAC OS. Hardware experience with desktop systems and servers. Also experience with IBM, Unisys A-Series and DEC mainframes. Authorized to work in the US for any employer
    Featured Skill iPhone App Development
    iOS Development
    Software QA
    App Development
    Personal Computer
    Desktop Application
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    I’m an experienced Mobile App Developer with a strong background in modern development frameworks like Jetpack Compose and SwiftUI. I specialize in creating robust, user-friendly applications with scalable architectures, including MVVM. - Knows Kotlin, C#, Java, Swift, and Unity Game Engine. - Regular communication and attention to detail are my strengths!
    Featured Skill iPhone App Development
    Artificial Intelligence
    iOS Development
    Android App Development
    Web Development
    Mobile App
  • $150 hourly

    • 0.0/5
    • (0 jobs)
    I'm dedicated to engineering innovative mobile applications that resonate with users. My tenure with Jane.com honed my adherence to industry standards, ensuring robust and scalable app architectures. This experience, coupled with a commitment to precision, drives my mission to craft mobile experiences that not only meet but surpass user expectations.
    Featured Skill iPhone App Development
    Apple Xcode
    MVC Framework
    Objective-C
    XCTest
    Unit Testing
    UIKit
    Accessibility Testing
    Ada
    iOS Development
    Swift
    Design Theory
    Software Debugging
    Adobe Photoshop
    Adobe Illustrator
  • $73 hourly

    • 0.0/5
    • (0 jobs)
    As a Mobile developer with 14 years of strategic and tactical technology experience, I primarily use languages and libraries such as Swift, Objective-C, Kotlin, Java, JavaScript, React and React Native. - Proven abilities in Product Management and end-to-end delivery across various mobile platforms (iOS, Android) - Proven track record and persuasive leadership skills in dynamic agile development environments - Presented about developing on Android at the Android developer meetings in Denver and Boulder. - Explore into new technologies and constantly learn new stuff and implement them when possible. - Goals are to be a part of a team that creates unique product line in the internet domain, that changes the way people perceive the internet and to work on technologies that are smartly leverage the internet to dramatically influence the conventional business economy. * Highly motivated, analytical and self-directed software engineer with proven track record of problem solving and developing site-facing leading edge technologies. Specialities: Working knowledge: Android SDK and NDK (Platform version 1.5 and above), iOS, Swift, Objective-C, Android, React Native, JavaScript, Sencha Touch, Ext-JS, IT Consulting, C, C++, C#, SQL, PL/SQL, NET, XML, XQuery, XSLT, UML, Design Patterns, Architectural Styles, Oracle Database 10g, Oracle Applications 11i, Oracle Purchasing, Payables and Inventory, IBM DB2, MySQL, BEA WebLogic, Aqua Logic, EXTJS Java, RxJava, Oracle, MySQL, Hadoop, Cassandra, ElasticSearch, Memcached, ZooKeeper, RabbitMQ, RESTful Services, MicroServices, SOAP, SOA, Spring MVC, SpringBoot, Maven Distributed Systems, Concurrency, GIT, Event Driven Architecture, Drools, Lucene, Event based Systems, Algorithms, Distributed Systems, Payment Systems, Service Oriented Architecture, Design Patterns, Large-Scale Data Processing Systems, Big data, Agile Software Development, JSON, AVRO.
    Featured Skill iPhone App Development
    iOS Development
    Swift
    Mobile App Design
    Mobile App Development
    PHP
    Android App Development
    Kotlin
    Java
    iPad App Development
  • $106 hourly

    • 0.0/5
    • (0 jobs)
    I have a breadth of experience, and am a mobile engineering veteran. I've worked for companies of all sizes- from enterprises of 10,000 employees to early stage startups where I’m the engineering department. I’ve worked with startups for the last 3 years of my career. I have the flexibility and discipline to provide value to whatever team I’m on. I've proven capable of developing, iterating, and deploying quickly, with ease. I'm clear and concise with my questions and quick to understand all the needs of any given project.
    Featured Skill iPhone App Development
    SwiftUI
    UI/UX Prototyping
    React Native
    Flutter
    UIKit
    Swift
    Android App Development
    iOS Development
  • $40 hourly

    • 0.0/5
    • (0 jobs)
    * IOS & Android Expert : Games & Business Apps * Website Development & Landing Pages * Social Media Manager: Blogs, Instagram, Facebook, Twitter, Linkedin Expert * Brand Growth & Recognition * Website Traffic: Social, PPC, Organic * Graphic Designer * ARKit, Rest API, MVC, MVVM, Socket Implementation, Third-party SDK, Cocoapod, Zeplin, Analytics, Data encryption, and decryption, Sqlite 3, Core Data. * Social media SDK integration Unity project integration and communication (ARKit) Augmented reality real-world integration with video recording Socket programming with UDP and TCP connection
    Featured Skill iPhone App Development
    Web Development
    Web Application
    App Development
    iOS Development
    Android App Development
    Mobile Game
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