Hire the best Backend Rest API Freelancers in the United States

Check out Backend Rest API Freelancers in the United States with the skills you need for your next job.
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based on 650 client reviews
  • $150 hourly
    HL7 FHIR certified Solution Architect, HIPAA-compliant Full Stack developer and Fractional CTO/adviser/consultant. I’ve taken startups to major health systems across the country and integrated with Epic, Cerner and Redox. I’ve authored implementation guides, HIPAA policy and worked with vendors to achieve SOC II compliance. I’m hands-on with system architecture, an expert in AWS and have experience in FHIR, HL7v2, EMR/EHR Integration and modern full stack development. I’ve contributed blog posts to Towards Data Science and Better Programming and I live in New York City. Website: whitebrick.com GitHub: s1monj - Fractional CTO - HIPAA Compliant Systems Architecture, Full stack Software Development and Technical Project Management - EMR/EHR/LIMS Integration and Customization - HL7 FHIR API Development (REST, GraphQL, Messaging and Document exchange) - HL7v2 Messaging, MLLP, Java HAPI, Apache Camel, Mirth Connect - SMART on FHIR, OpenID Connect and OAuth 2.0 Configuration - Data Modelling, Database and Clinical Data Repository Development - Cloud Migration, HIPAA & SOC 2 Compliance I am language agnostic and have proven production experience with the following technologies: - TypeScript, JavaScript, Python, Java J2EE, Ruby / Rails, SQL, Bash, Perl, React Hooks, HTML, CSS - SQL, Postgres, MySQL, SQLite, Oracle, MongoDB, DynamoDB, Redis, ElastiCache - REST, OpenAPI, Swagger, GraphQL, Schema stitching, remote joins, federation, WunderGraph, Hasura - NestJS, Serverless Framework, Django, Spring Boot, Prisma, Active Record, TypeORM, iBatis, Hibernate - AWS Lambda, AppSync, API Gateway, Amplify, RDS, Aurora, SES, SQS, EC2, Fargate, ECS, VPCs, Route 53, Elastic Beanstalk, ALB - Fly.io, Heroku, Auth0, Neon, MongoDB Atlas I'm always happy to chat about your project so don't hesitate to reach out.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Healthcare Interoperability
    Cloud Migration
    Data Integration
    Health Level 7
    FHIR
    API
    Database Design
    Epic Systems Medical Software
    LIMS
    Healthcare IT
    API Development
    RESTful API
    Apache Camel
    GraphQL
    Database Development
    API Integration
  • $65 hourly
    If you are looking for an experienced, self-motivated Umbraco developer with a passion for coding than I am the person you are searching for. Whether you need to create a website with an amazingly easy CMS or design solutions to solve complex business obstacles, I can help your business reach its goals. Specializing in Umbraco CMS application development, I have been responsible for every stage of a program's lifecycle for the past 15 years. From complex, data-driven applications utilizing TSql and Web APIs to custom and creative tools built upon Umbraco CMS, I thrive on analytical programming challenges and learning new technologies. Aside from being able to develop amazing programs, I also possess an amazing ability to problem solve outside-the-box. I live for new and exciting challenges. You want to adopt a new technology, I'm on it. Need to add a JavaScript based animation to a website, I'll figure it out. In short, I literally dream in code.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    ASP.NET Ajax
    Umbraco
    RESTful API
    Database Architecture
    Visual Basic
    Entity Framework
    API Integration
    Microsoft SQL Server
    Ecommerce Website
    ASP.NET Web API
    C#
    ASP.NET
    CSS 3
    HTML5
    jQuery
  • $70 hourly
    Do you want to save precious time for the things your business really wants to focus on? An expert will take worries off your plate while helping you deliver more value to your customers. When you hire an expert, you actually save money despite higher rates. This is because: 🤝 Expert communication reduces costly detours and rework 📑 Expert code is easy to read and modify, reducing maintenance costs 📞 Expert software has a lower failure rate, saving on support costs That’s where I come in. My mission is to be the expert that saves you time and money, which ultimately lets you do more for your business. I’m a Top Rated software engineer with over 10 years of experience. I’ve worked in a variety of industries and companies ranging from small to Fortune 500. Let me handle the tech so you can do more of what you do best. MY PROCESS 👂 Understand We have a Zoom call where I make sure to get a good understanding of what you need and why. With this conversation we often find solutions that are simpler, more effective, and cheaper than originally envisioned. 🔮 Plan I figure out what needs to be done, as well as some possible risks and limitations. I go through a rough estimate of how long it will take and what it will cost. I also estimate long term support costs. We talk about options for reducing scope or quality if the timeline or budget don’t fit. Then you submit an offer. 🛠 Execute This is the easiest part for you. I do the thing, following good practices and producing good code. For larger jobs, I execute on one manageable chunk at a time. 🔁 Iterate It’s normal to have a couple minor revisions once you can see results and start getting new ideas. I generally report progress weekly so we have a chance to share feedback and course correct early if anything needs to change. 😀 Deliver Finally, I deploy or deliver the work. We set up billing for long term support if necessary. We talk about ideas for future projects and exchange feedback. Your customers rave about what you do, world leaders thank you, and the Pope gives you a medal. MY SKILLS ✔ C# / .NET / MVC / REST# ✔ Python / Django REST Framework ✔ SQL Server / MySQL ✔ Git / GitHub ✔ Google Cloud / Azure / AWS ✔ Linux / Visual Studio / Postman ✔ Server / Serverless Deployment Do I sound like a good fit for your project? Let’s line up a call and make it happen.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Google Cloud Platform
    Django
    RESTful API
    CI/CD
    .NET Core
    API Development
    Deployment Automation
    GitHub
    API
    Bug Fix
    Prototyping
    C#
    Linux
    API Integration
    Python
  • $70 hourly
    I am a Full Stack Developer, Web Scraper and QA Automation Tester. I enjoy working with small business leaders, startup companies, investors, and anybody with a great idea. If you have an idea or a need, I would love to work with you to make it happen. My web-based solutions will allow you to focus more time on growing your business. I have developed automated test programs for extremely high volume products in the semiconductor industry. This experience has helped me in forecasting all possible scenarios that a customer can encounter with the software. All the software I develop use the latest technologies, which include Next.js for full-stack server-less apps, React.js on the front end, Node.js on the backend, MongoDB for the database and Puppeteer as a scraper and to test. You will find my applications to be high-speed. I focus on reducing your costs without sacrificing quality. After we have an initial meeting to discuss your requirements, I will create a detailed plan of attack for the project. During development, I can host the site for free and give you access to it. You will find that I am very organized, incredibly meticulous and have excellent communication skills. I'd love to learn about your business and to see how I can help it grow.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    MongoDB
    RESTful API
    Automation
    Scripting
    Business with 1-9 Employees
    Web Development
    React
    Next.js
    CSS 3
    SaaS
    Google Chrome Extension
    Web Application
    JavaScript
    HTML5
    Node.js
  • $70 hourly
    👋 Hey there! 🚀 I am a seasoned Full-Stack and Mobile App Development Lead with a rich history of working in 📱 Mobile App Development, 🤖 Machine Learning, 📊 Data Analytics, and 🚗 Autonomous Driving space. 👨‍💻 Currently, I lead a team of iOS, Android, and Full-Stack engineers who love developing top-notch apps. Working together, we deliver results that exceed expectations while ensuring projects are completed on time and on budget. 👨‍🔬 My area of expertise is in the design and development of robust, scalable, and high-performance mobile applications using modern technologies and frameworks. Additionally, I have experience in integrating 🤖 machine learning and 📊 data analytics into mobile apps to provide personalized and intelligent experiences to end users. 🚗 Furthermore, I have a deep understanding of autonomous driving systems. I have contributed to the development of several sensor models, including a deep learning-based camera model for computer vision. In addition, I have experience developing algorithms and software for LiDAR-based perception. 💼 In summary, if you are looking for a Full-Stack and Mobile App Development Lead with a track record of delivering high-quality solutions, I am the right fit for your project. I am committed to ensuring that your project is a success, and I look forward to the opportunity to work with you.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    RESTful API
    Mobile App Development
    Python
    Kotlin
    iOS
    React Native
    Android
    MongoDB
    Amazon Web Services
    Flutter
    Swift
    React
    Node.js
  • $100 hourly
    My expertise has helped increase revenue by hundreds of thousands for several major media brands in the LA area. Some notable brands include: - LAist - KPCC - LAist Studios - The Big One I have expertise in several technologies: JavaScript, TypeScript, React, Next.js, Node.js, Nest.js, PHP, Ruby on Rails, HTML, CSS, AWS, Wordpress, Wix, Google Services, Stripe, Auth0, and Docker to name a few.  My approach is to fully understand your needs and craft a solution that’s tailor-made for you. I look forward to getting to know you and helping you grow your business to its maximum potential! Testimonials: "I'm not exaggerating when I say Jay is an absolute joy to work with. Besides producing top class software, the persistent positive attitude he brings to finding solutions and collaborating is inspirational. He also has a great command of UI and UX, and for how best to prioritize his work." "Jay has a great attitude towards solving user-centric problems. He's speedy with his work and eager to refactor and clean up code. I would not hesitate to work with him again."
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Amazon Web Services
    RESTful API
    Stripe
    Node.js
    Auth0
    Wix
    JavaScript
    Elasticsearch
    API
    TypeScript
    Next.js
    Web Application
    WordPress
    React
  • $45 hourly
    Looking to increase your leads and grow your business with Digital Marketing? Experienced in: ✅ Google Ads (Adwords) / Pay-Per-Click (PPC) ✅ Digital Marketing Strategy ✅ Facebook and Instagram Ads ✅ Graphic Design for print and web ✅ Logo & Brand identity creation ✅ Web Development (HTML5, CSS3, JavaScript, Node JS) ✅ Onsite and Offsite SEO ☑ - Google Ads Search Certified ☑ - Google Ads Display Certified ☑ - Google Ads Shopping Certified ☑ - Google Ads Video Certified ☑ - Bing Ads Certified I’m a Digital Marketing Specialist with a Business Operations background and over 8 years of experience under my belt. I have a customer-centric and analytical mindset and have developed various digital marketing strategies that allow businesses increase their customer base and create brand loyalty over time. If you’re also looking for something original, creative and professional, I can also give you a hand! As a Graphic Designer I create logos and brand identities that make companies stand out of the crowd and gain a competitive edge in an increasingly crowded marketplace. I also create beautiful and engaging websites that will impress your viewers and deliver value, inspire confidence with your prospect customers and optimize for conversions and leads. I've got the creativity and professional experience to assist your company by combining these different skills for a strongly focused Marketing Campaign with a successful outcome. Let me help you create a solution that will propel your organization and bring continuous business for both today and tomorrow.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Digital Marketing Strategy
    RESTful API
    Web Development
    Pay Per Click Advertising
    Business Development
    Front-End Development
    Social Media Marketing
    Search Engine Marketing
    Search Engine Optimization
  • $56 hourly
    As Senior Full Stack Developer at Wematch.live - a back office trading platform used by over 90 financial institutions, I take pride in my ability to develop backend API systems and turn them into responsive UI applications. Technical Skills: JS, TS, React / Native, Redux, Node, Python, Ruby / Rails, SQL / NoSQL, Responsive Design, and Git workflow-based programming. Experienced in Agile Development | Proven industry experience building startups in both the NYC / Tel Aviv tech spaces Military Leadership | Former Sergeant in the IDF | Reservist
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Firebase
    RESTful API
    MongoDB
    Front-End Development
    PostgreSQL
    Python
    SQL
    Ruby on Rails
    CSS 3
    HTML5
    React
    Node.js
    JavaScript
    TypeScript
  • $80 hourly
    Full Stack Developer specializing in: Backend programming skills: • Django/Flask • Python • Docker & Docker-Compose • NGINX/Apache Web Server Frontend skills: • Angular • React/Redux • Next.js/TypeScript • Jasmine • Karma • D3.js (Data Visualization) • Javascript • HTML, CSS/SCSS, BootStrap, Tailwind • Responsive Design Databases(mySql, Postgresql, mongoDB, Redis, Memcache...) • SQLite • MongoDB • Firebase • PostgreSQL • MySQL Platforms • Windows 10 • Mac • Linux Hosting • AWS • DigitalOcean I enjoy long-term projects and don't have a preference between small or medium businesses, as long as what we are creating is important to someone : ) In terms of the process of working with you, it goes as follows: 1. Consulting A detailed talk about the requests and your needs and your ideas in mind, and our suggestions to you for a better result. 2. Process of elaboration Development of concepts and ideas based on the detailed specifications of requests that are receive from you. Definition of terms and development of the accepted concept. 3. Uses Presentation of the end product to client. Carry out changes, if necessary, the testing and setting up a project to work. I look forward to speaking soon!
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Next.js
    API
    CSS 3
    PostgreSQL
    HTML5
    MySQL
    Responsive Design
    React
    RESTful API
    DigitalOcean
    Django
    Angular
    Docker
    JavaScript
    Python
  • $75 hourly
    Flutter mobile/ Node JS backend Sr Developer - CI/CD pipeline for TestFlight distribution with fast lane - Extensive experience with Flutter Web - Unit testing and automated testing in Flutter - BLoC state management - Experience with domain based and feature based architecture - Efficiently wrote code that works on all platforms and looks great - Careful package use to follow best practices and eliminate unneeded dependencies - Pixel perfect design from Adobe XD or Figma design - Experience building Rest API and Firebase integration from scratch for a large project - Architected database and performed migration to database schema - Deployed infrastructure in Heroku and AWS for best security posture and best practices
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Dart
    Firebase Cloud Firestore
    Project Plans
    RESTful API
    PostgreSQL
    Flutter
    Mobile App Development
    Mobile App
    Firebase
    User Authentication
    MySQL
    Node.js
    Database Design
  • $40 hourly
    If you are looking for a 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞, 𝐜𝐫𝐞𝐚𝐭𝐢𝐯𝐞, 𝐚𝐧𝐝 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐝 App Developer, you have come to the right place - I will eagerly become your longtime partner. I am an expert 🆃🅾🅿- 🆁🅰🆃🅴🅳🏅cross-Platform App Developer (Android, iOS, Linux, Mac, Windows) with 12+ years of experience, 𝐈 𝐡𝐚𝐯𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐝, 𝐭𝐞𝐬𝐭𝐞𝐝, 𝐚𝐧𝐝 𝐝𝐞𝐩𝐥𝐨𝐲𝐞𝐝 𝐬𝐞𝐯𝐞𝐫𝐚𝐥 𝐚𝐩𝐩𝐬 𝐨𝐧 𝐛𝐨𝐭𝐡 𝐭𝐡𝐞 𝐚𝐩𝐩 𝐬𝐭𝐨𝐫𝐞 𝐚𝐧𝐝 𝐩𝐥𝐚𝐲 𝐬𝐭𝐨𝐫𝐞.I prefer long-term work and am In love with coding and am proud of my creations! 👉I always follow the best testing techniques as per the international standards of Apple and Andriod's policy regarding app submission. 👉If you need a sleek cross-platform mobile app for Android and iOS, invite me for an interview! 👉If you have an idea for the site or a problem to solve, contact me to get a free consultation. 🅸 🅱🅴🅻🅸🅴🆅🅴 🅼🆈 🅲🅻🅸🅴🅽🆃'🆂 🆂🆄🅲🅲🅴🆂🆂 🆃🅾 🅱🅴 🅼🆈 🆂🆄🅲🅲🅴🆂🆂 !)🙌🏆🥇🔑🎯💯
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Google Analytics
    User Profile Creation
    In-App Purchases
    Android App Development
    iOS Development
    API Integration
    Push Notifications
    Flutter
    Mobile App Development
    RESTful API
    Firebase
    Dart
    Mobile App Redesign
    Map Integration
    Payment Gateway Integration
  • $80 hourly
    As a senior full stack developer with 10+ years of experience, I am responsible for designing, developing, testing, and deploying web applications or websites using modern programming languages and frameworks such as React, Angular, Node js, JavaScript, HTML5, and CSS 3. Also, I am well-versed in building desktop and mobile applications using C# .NET, and React Native. I am highly skilled in building web applications that load quickly and perform well on multiple devices (desktop, tablet, mobile). In addition to professional, high-level technical skills, I can analyze complex problems, design innovative solutions, and collaborate in teams. My expertise involves the entire software development lifecycle, from architecture, and design to implementation and maintenance. As a full-stack developer, I have proficiency in both front-end and back-end technologies. ☛Front-end UI development using modern JavaScript frameworks such as React, React Native, and Angular. ☛Strong expertise in developing and consuming RESTful API web services in Node.js, proficiently handling data formats such as JSON and XML. ☛Robust and scalable web/desktop applications using C# .NET Core, and ASP.NET in a Cloud environment, particularly on Microsoft Azure. ☛ Database development with SQL/NoSQL such as MongoDB, PostgreSQL, MS-SQL Server, T-SQL. ☛ Cloud architectures such as AWS, Azure and GCP. Technologies: ⚬ React, Next.js, React Native, Redux ⚬ Angular 2, Angular 7 - 17 ⚬ Node.js, Express ⚬ Typescript, JavaScript, HTML, CSS ⚬ C#, .NET Core, ASP.NET ⚬ WPF, Blazor ⚬ MongoDB, PostgreSQL, SQL Server ⚬ AWS ⚬ Git Practices ⚬ Object Oriented Programming (OOP) ⚬ Test Driven Design (TDD) ⚬ SOLID Principles ⚬ Several other strings of letters Looking for a passionate, experienced software architect with a head for business that can bring teams together? Contact me If there is good fly fishing nearby I would be extra interested.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Amazon Web Services
    C#
    CSS
    HTML
    RESTful API
    Tailwind CSS
    JavaScript
    MEAN Stack
    MERN Stack
    TypeScript
    React Native
    Next.js
    Node.js
    Angular
    React
  • $88 hourly
    🏅𝗥𝗲𝗮𝗰𝘁.𝗝𝗦 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗣𝗿𝗼 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 
I have 10 years experience working for big tech companies in New York, Atlanta and RTP North Carolina as well as an early stage startup where I was the first employee. 
with extensive expertise in business automation is demonstrated through a robust portfolio of over 1500 sophisticated automations and tailor-made front end applications. 🥇𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗘𝘅𝗽𝗲𝗿𝘁 My proficiency lies in implementing cutting-edge frameworks for business automation, workflows, and marketing automation, enabling seamless integration of APIs, webhooks, and REST APIs. With a fortune 100 proven track record, I have successfully delivered comprehensive business workflows and automation solutions to satisfied clients. Are you looking for a seasoned React.js Developer who can help you turn your data retrieval challenges into opportunities? Search no further! With a successful track record of launching dozens of large-scale front end projects, I bring the expertise and know-how needed to extract valuable insights from the vast ocean of the internet. I'm the 5 Star Software Developer and Automation Developer in Atlanta Georgia with overly positive feedback. I take my reviews very serious as I am to rank Top Rated Plus on Upwork. With a proven history of massive performance improvements for Fortune 500 companies and well-known organizations, including the following to illustrate some of them: ✅ Dell Technologies (Fortune 500 Company) ✅ Michelin Tires (Fortune 500 Company) ✅ North Carolina A&T State University ✅ Lexicon (~2.5 Billion Estimated Revenue per Year) ✅ Hill Technologies (~150 Million Estimated Revenue per Year) ⭐ Here's what I can bring to your project ⭐ ✅ You get a collaborator valuing effective communication, not just a technical expert. ✅ Ensuring clear, concise communication for understanding project requirements. ✅ Incorporating your feedback for project adaptation and improvement. ✅ Aiming to exceed expectations with high-quality deliverables. ✅ Computer science background from NCAT, offering unique expertise. ✅ Creating elegant, scalable, and maintainable code. ✅ Producing code that's easily comprehensible by fellow developers. My areas of specialization encompass a wide range of services, including: - Implementation of Chat-GPT AI for Business Purposes - API Integrations and Automation - REST, ReactJs, Javascript, Python, Java, C++, C#, Bash, Html/CSS - Business Workflow Automation - Advanced RSS Integration - CRM Automation - Data Analytics - Leads Flow Management - CRM Data Migration - Go High Level Setup - Facebook & CRM Leads Integration - APP Script, Google Sheets - Airtable, HubSpot, ActiveCampaign - CLIO, Lawmatics - Google Workspace, Google Cloud Moreover, I am adept at integrating payment gateways on third-party APIs like MemberPress and Kajabi, as well as working with popular CRM platforms such as Pipedrive, HubSpot, Airtable, Zoho CRM, and Insurance CRMs. Additionally, I possess a comprehensive skill set in web development, specializing in full-stack website development and leveraging the power of Zapier for business automation. I have an in-depth understanding of managing business workflows, integrating CRMs, and designing web solutions using advanced frameworks ⭐ Why choose me over other professionals on Upwork? 🤔 𝗨𝗻𝗺𝗮𝘁𝗰𝗵𝗲𝗱 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: With a solid background in computer science and real estate, I can deliver sophisticated and effective solutions for your project. 𝗘𝘅𝗰𝗲𝗽𝘁𝗶𝗼𝗻𝗮𝗹 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: I believe in open and constant communication, ensuring that all your needs and feedback are properly addressed. 𝗖𝗼𝗺𝗺𝗶𝘁𝗺𝗲𝗻𝘁 𝘁𝗼 𝗛𝗶𝗴𝗵-𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗖𝗼𝗱𝗲: prioritize writing clean, maintainable, and scalable code that not only meets but surpasses expectations. 𝗘𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻: By working with me, you'll experience a smooth, hassle-free collaboration that respects your time and contributes positively to your project. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝘃𝗲 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 𝗮𝗻𝗱 𝗥𝗲𝗺𝗮𝗿𝗸𝗮𝗯𝗹𝗲 𝗥𝗲𝘀𝘂𝗹𝘁𝘀: I leverage my creativity and problem-solving skills to provide innovative solutions, always aiming for remarkable results that add value to your business. ------------------------------------------------ NOTE: I only work directly with the business owner for the project. If you're not the owner, I'll need to speak with them first. 👥 - Ed
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Asana
    RESTful API
    Selenium WebDriver
    Angular
    Java
    C++
    HTML5
    React
    Node.js
    Zapier
    Perl
    JavaScript
    Bash
    Python
    Selenium
  • $85 hourly
    ✅ EXPERT-VETTED BY UPWORK The Upwork Expert-Vetted program identifies the top 1% of talent on the platform. All Expert-Vetted freelancers undergo a rigorous screening process. WE'LL GET YOUR PROJECT DONE THE RIGHT WAY! Expert Full Stack Developer • Over 15 Years Experience • .NET • JavaScript • PHP • API Integration • E-Commerce • CMS (Content Management Systems) • Wordpress Optimization • AI / ChatGPT Integration • More (See Below) Dear Potential Client, Would you like to get your project done the right way: quickly, cost effectively and correct – the first time around? I am a Senior Developer / Technologist with over 15 years of experience in development, architecture and managerial roles. A Yale-educated Computer Scientist with a strong background in Mathematics, for many years I held the position of Senior Developer at the March of Dimes, an internationally known (and historically significant) non-profit organization based in the New York City area. There, I focused on complicated full-stack development tasks in the .NET, JavaScript, PHP and other technology stacks, as well as management roles, including mentoring, carrying out detailed departmental planning, authoring white papers and helping set the overall technical direction of the organization. In recent years, I have switched my focus to independent technology projects, through my consulting firm, RMV & Co., LLC. In addition to my technical skills, I am known for my top-notch communication skills, both verbal and written. For this reason, clients often choose my services when they are looking not just for a seasoned technologist, but for someone whom they can count on to have clear, concise and precise communication with during the entire lifecycle of their projects, from the initial consultation to planning, development, testing and follow-up after the project has been completed. I offer free consultations for all potential clients. Feel free to text me to set up a meeting. Wishing you great success, Michael R. Klosner, Tiger Technology Services –––––––––––––––––––––––––––––––––––- Highlighted technological experience: ➠ .NET Framework / .NET Core ➠ JavaScript (JS) Full Stack, including Node.js, React.js, Express.js, more ➠ Artificial Intelligence (AI), Machine Learning (ML), AI Chatbot (ChatGPT API) integration ➠ Apache Lucene / SOLR, Full-Text Search Engines ➠ Matlab, R (Statistics) / RStudio ➠ SQL (SQL Server, MySQL), NoSQL (MongoDB) ➠ Entity Framework ➠ Angular, TypeScript, jQuery ➠ eCommerce integration: Amazon Payments, Paypal, Shopify, Stripe ➠ XML, XSLT, JSON, AJAX, RESTful APIs ➠ C#, C++, C, ASP.NET, MVC ➠ Java / Spring, PHP ➠ Python ➠ HTML 5 / CSS 3 ➠ Content Management Systems (CMS) ➠ OpenText CMS / OpenText Delivery Server ➠ Wordpress ➠ Jira, Git, Github ➠ SDLC –––––––––––––––––––––––––––––––––––- Communications skills include but are not limited to: ➠ Explaining highly technical issues to non-technical individuals and groups in a straightforward and engaging manner. ➠ Justifying budgets and timelines from a technical point of view. ➠ Managing developers as well as non-technical staff, and serving as technical team lead. ➠ Composing and presenting technical policy papers, roadmaps and white papers. ➠ Representing companies (virtually or in person) at shareholder meetings, symposiums, technology expos and other gatherings. –––––––––––––––––––––––––––––––––––- Background & languages: I was born in the United States (New York). I have proficiency in the following languages: ➠ English (Native tongue) ➠ Hebrew (Completely fluent) ➠ Spanish (Conversational) ➠ Portuguese (Conversational) –––––––––––––––––––––––––––––––––––- Work philosophy: I approach each project as if it were a work of art. From initial exploration of the problem, to design of its solution, to execution and testing, my philosophy is that everything should fit together as a well thought-out, structured, and — dare I say — beautiful whole. If you're looking for a seasoned technologist who has worked in a vast variety of technologies, who picks up new technologies quickly and easily, and who approaches problems and their solutions in a structured, well thought-out manner, resulting in maintainable and scalable long-term solutions, then I am the right person for you. –––––––––––––––––––––––––––––––––––- And, just to help you get a better sense of who I am on a personal level, here are some of my hobbies: ➠ Skydiving (I hold a USPA C license and have completed approximately 500 jumps) ➠ Aviation (FAA Private Pilot’s License granted in January, 2017) ➠ Sea Kayaking ➠ Hiking the Appalachian Trail ➠ Motorcycling ➠ Marine Biology (M.Sc. in Marine Biology) ➠ Studying and Teaching Ancient Languages –––––––––––––––––––––––––––––––––––- Let's talk! Message me to set up a call to determine if it's a good match; and if so, let's collaborate to get your project done – the right way. Wishing you a successful and fulfilling day, Michael R. Klosner
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Apache Solr
    ASP.NET MVC
    Node.js
    API Integration
    HTML5
    C#
    Ecommerce Website Development
    .NET Framework
    Angular
    JavaScript
    .NET Core
    RESTful API
    C++
    Mathematics
    MATLAB
  • $50 hourly
    Full stack developer with experience building entire applications. Experience with: 🎨React, Next.js Typescript, Tailwind CSS, Javascript, HTML, CSS, PHP(WordPress Theme/ Plugin Development) 📝WordPress, CascadeCMS 🗄️PostgresSQL, MySQL, Firebase, AWS(S3, EC2, LAMBDA), GCP(cloud functions, compute engine, cloudSQL)
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    React Bootstrap
    Tailwind CSS
    CSS
    Front-End Development
    User Interface Design
    RESTful API
    Responsive Design
    ExpressJS
    Bootstrap
    Web Development
    Node.js
    JavaScript
    HTML5
    MySQL
    React
    TypeScript
  • $55 hourly
    🔧 As a seasoned Netsuite Developer and Techno Functional consultant , I bring my expertise in developing customized solutions and optimizing business processes using the Netsuite platform. I'm passionate about leveraging technology to drive efficiency and deliver exceptional results. Let's take a closer look at my tech stack and the services I offer! 🚀💼 🔹 Tech Stack: 💻 Netsuite ERP: Proficient in developing and configuring solutions within the Netsuite ERP ecosystem, including customization, workflows, and scripting using SuiteScript (JavaScript). 🔹 SuiteCloud Development: Skilled in SuiteCloud IDE, SuiteBuilder, SuiteFlow, and SuiteAnalytics for comprehensive application development and customization. 🔹 Integration: Experienced in integrating Netsuite with external systems using APIs, such as REST, SOAP, and Web Services, ensuring seamless data flow and system interoperability. 🔹 SuiteCommerce: Proficient in developing SuiteCommerce Advanced (SCA) websites, customizing themes, and implementing responsive designs for a compelling online shopping experience. 🔹 Database Management: Knowledgeable in managing Netsuite's relational database, including data modeling, SQL queries, and optimization for efficient data retrieval and reporting. 🔹 Services: 📊 Netsuite Implementation: Adept at guiding organizations through the end-to-end implementation process, including requirements gathering, solution design, configuration, testing, and training. 🔧 Customization and Scripting: Skilled in developing tailored solutions using SuiteScript (JavaScript) to address specific business needs, automating processes, and enhancing system functionality. 🔄 Integration Services: Proficient in integrating Netsuite with third-party applications, such as CRM systems, payment gateways, and e-commerce platforms, enabling seamless data synchronization and streamlined workflows. 📈 System Optimization: Experienced in analyzing existing Netsuite setups, identifying optimization opportunities, and implementing performance enhancements to maximize system efficiency and user experience. 🔒 Security and Permissions: Well-versed in managing user roles, access controls, and data security within Netsuite to ensure data confidentiality and compliance with industry regulations. I am good in: Netsuite Development SuiteScript SuiteCloud Netsuite ERP Customization Integration SuiteCommerce Database Management Implementation Scripting System Optimization Security and Permissions SuiteAnalytics SuiteBuilder SuiteFlow SuiteCommerce Advanced (SCA) REST API SOAP API Web Services Data Modeling I'm excited to collaborate with you to leverage Netsuite's capabilities and deliver tailored solutions that meet your business objectives. Let's connect and discuss how I can contribute to your Netsuite development projects! 🌟🔗 Thank you for considering my profile. I'm here to answer any questions and provide further information. Let's build great solutions together! 💡💪
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    SuiteCRM
    RESTful API
    Oracle NetSuite
    NetSuite Administration
    NetSol Technologies Ascent
    NetSuite Development
    MERN Stack
    Node.js
    React
    Amazon Web Services
    Cloud Computing
    DevOps
    Database
  • $100 hourly
    Senior Full Stack / Serverless Engineer specializing in migrating from legacy code, working in polyglot (multi-language) environments, and protecting data integrity. I build modular, testable, and scalable systems that guarantee the integrity of your data, ensuring it can keep up with all your business needs. I have driven the migration of large-scale enterprise applications from legacy implementations to modern, cloud-based architectures while ensuring no loss of data in flight and minimizing downtime. As business needs change, technologies evolve, and developers leave a team, you must get to a robust, easy-to-maintain, well-documented codebase. Without institutional knowledge of the history behind each design decision, you can wonder how to escape a chaotic situation without affecting your end users. I bring a systematic approach to navigating these kinds of projects. Whether this is where your system is now, or you're starting something new and want to ensure you keep up with best practices from the start, working with me will ensure you end up with maintainable, thoroughly tested, clearly documented, and stable code. I will start by getting to know your business needs and technical requirements and, from there, develop a plan that divides your goals into clearly defined short-term milestones. My fixed-priced contracts ensure that your budget is not affected by surprises. At the same time, my agile approach to planning will keep things flexible enough to accommodate any shifting priorities.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Spring Boot
    API Integration
    API Development
    Flask
    Koa
    ExpressJS
    Node.js
    Automated Deployment Pipeline
    Cloud Services
    AWS Lambda
    Terraform
    Microservice
    RESTful API
    Web Development
  • $50 hourly
    If a project can be solved using Google Sheets, Google Apps Script, or Google Cloud Functions, consider it done. I maintain authoritative knowledge of the capabilities and limitations of these tools, as well as a deep understanding of their strengths and weaknesses. I also posses a wealth of hands-on experience harnessing all the advanced features within Google's IDE. Years of experience with the following: - Google Apps Script & Apps Script API - JavaScript (mostly vanilla, but occasionally use various frameworks for specific needs) - Python - Google Workspace Suite: Sheets, Docs, Drive, Calendar, etc. - Microsoft Excel - Firebase / Firestore Database - Google Cloud Projects - External service integrations (RESTful APIs) - HTML / CSS / jQuery - Web development - Node.js Some experience with: - Zapier - Typeform - Jotform - Calendly - AppSheet - AutoHotkey - MIT App Inventor If you are looking for an API integration, I can figure anything out, but I specifically have experience with all of the following: Google-specific APIs: - Apps Script API - Sheets API - Forms API - Drive API - Gmail API - People API - Cloud Vision API - Admin SDK API - Cloud Identity API - AdSense Management API - Ads API - BigQuery & BigQuery Storage API - Firebase Remote Config API Other APIs: - OpenAI API (Chat GPT) - Level 365 API - TokApi - Twilio API - WhatsApp Business API - WhatsApp Cloud API - Reddit API - Instagram API
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Excel Formula
    Google Charts
    Web Design
    RESTful API
    Google Cloud Platform
    HTML
    SQL
    CSS
    XML
    Google Sheets
    Automation
    Google Apps Script
    PHP
    JavaScript
    Microsoft Excel
  • $40 hourly
    Elementor Pro - Divi Theme - WPBakery Page Builder - WordPress Developer - Salient - JupiterX - The7 - Avada - SEO - Gutenberg - Full Stack Developer - WooCommerce - WordPress Designer - Python Developer - JavaScript Developer -HTML5 - CSS Top Rated & Verified. I have been using WordPress since 2010. I have 13 years experience with WordPress design and development. You are at the right place if you need a new WordPress site or need a Website re-design. I believe creating beautiful modern designs to catch a users attention and create an emotional connection with the user when visiting your page is super important to turn your potential clients into paying clients. Why should you hire me? 1. I am Upwork Rising Talent & Verified and most importantly I treat every project as it is my own. 2. My work is consistently of the highest possible quality. I work full-time and I am extremely reliable. With quick response times and great communication. I always meet tight deadlines and I guarantee job satisfaction from beginning of project to very end. The quality of my work helps maximize excellent ROI for my clients. 3. I offer 100% money-back guarantee if you are not happy with my work. One of my most important values I carry when working with my clients is communication. This for me, is the key to a great working relationship that brings out the results my clients are looking for. This is why I always work closely and stay in touch with my clients. I am an expert in WordPress Design/Development. Expert with many popular Theme's such as Avada, Divi, Salient, JupiterX, The7. Elementor Pro, WPBakery Hundreds of Plug-Ins, Slider Revolution, Parallax, Animations, Transitions, Gradient Overlays, HTML5 & CSS3 expert. Exceptional with Responsive Mobile Design. Front-End Development with React, JavaScript, HTML, CSS. I use Python, Django, FastAPI, PostgreSQL, REST APIs on back end for software development. SEO Wizard: On-site, Off-site, Backlinking, Semantic SEO. I have different strategies and plans to rank depending on aggressiveness to obtain first page status on Google.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Bootstrap
    JSON
    Front-End Development
    Docker
    WordPress Development
    React
    Python
    RESTful API
    Microservice
    Django
    WordPress
    CSS 3
    HTML5
    JavaScript
    SEO Backlinking
  • $45 hourly
    Highly self-motivated, and goal-oriented Software Engineer with more than 9 years of web development experience. Enthusiastic team player, detail-oriented and a fast learner that enjoys new challenges.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    WooCommerce
    WordPress Theme
    API
    Ecommerce
    RESTful API
    Vue.js
    MySQL
    CSS
    JavaScript
    PHP
    WordPress
    Bootstrap
    WordPress Plugin
    Web Development
    jQuery
  • $50 hourly
    Being passionate, creative, teamwork, debugging, and talks about code are my favorites. I LOVE CODING AS MUCH THAT I LOVE CHOCOLATE !!! My expertise includes working with various programming languages such as Javascript, Typescript, Python, as well as frameworks such as React, Vue, Node, and Django. I have deep understanding of Front-end development and am skilled in Html/CSS and Javascript. Additionally, I have experience with back-end development, including building RESTful APIs, working with databases like MySQL, and MongoDB, and using server-side frameworks like Node.js. I believe that I could make meaningful contributions to your project and help further missions. My skills are ✔️ Javascript / Typescript, PHP, Python Frontend - ReactJS/NextJS, Redux-Toolkit/Thunk, VueJS, EJS, VanillaJS, GraphQL, jQuery, Tailwindcss, MUI, Bootstrap, Scss, styled-components, TinyMce, stripe.js, chart.js Backend - Node.js, Express.js, Python/Django, SendGrid, JWT, OAuth, Swagger ✔️ Database - MongoDB, PostgreSQL, MySQL, AWS DynamoDB, Google Firebase, 3th-api integration ✔️ Automation Test - Jest, Cypress, Mocha, Enzyme ✔️ Services and Tools - AWS, Docker, Microservices, Figma, XD, Photoshop, Git, Bitbucket, Jira, Sentry.io, Jenkins, CI/CD, WordPress
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    GraphQL
    Vue.js
    Tailwind CSS
    Amazon Web Services
    Next.js
    Node.js
    MongoDB
    HTML
    Python
    React
    CSS
    TypeScript
    JavaScript
    SQL
    RESTful API
  • $50 hourly
    Hi there! My name is Taylor. I'm not your typical project manager and software engineer. I'm more like a unicorn with a keyboard! I'm a lover of all things techy and I know how to make those pixels dance to the tune of your project's needs. From the first scribbles on a napkin to the final product, I'll be your trusty sidekick, making sure everything runs like a well-oiled machine. With over 15 years of experience under my belt, I've worked with companies of all shapes and sizes, from nimble startups to heavy hitters in the Fortune 500. You name it, I've seen it, and I'm ready to bring my expertise to the table. You know that friend who's always super organized? Well, that's me, but with a dash of quirkiness and humor. I'm not afraid to crack a joke to lighten the mood and keep everyone smiling while we hustle hard to make your project a success. So, if you want to work with a project manager and software engineer who knows how to have fun while getting the job done, then look no further! I'm your gal. If you're ready to take your project to the next level, let's team up and make some magic happen!
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Google Docs
    Google Sheets
    RESTful API
    Firebase Cloud Firestore
    Project Workflows
    Technical Project Management
    Documentation
    Jira
    Scrum
    Digital Strategy
    Digital Project Management
    Atlassian Confluence
    Web Development
    JavaScript
    React
  • $70 hourly
    Hi! I'm a senior JavaScript developer. My main skill is React.js and I am frontend focused fullstack web developer. Frontend: JavaScript, TypeScript, React.js, Next.js, Gatsby.js, Vue.js, Angular, Bootstrap, Material UI (MUI), Styled components, Tailwind css, SCSS, Apexchart, Amchart, Highchart, D3.js, Wix, Wordpress Mobile: ReactNative, Flutter Backend: Node.js, Python/django, Express.js, Nest.js DataBase: MongoDB, SQL Cloud: AWS, GCP, Azure Other: Zoho, Contentful, Prisma, Prismic, Contentful, AI, ChatGPT Tools: Jira, Trello, Figma, Sendgrid, Stripe, Zepline, Vercel, Netlify, Heroku, Github, Gitlab, Bitbucket
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Decap CMS
    RESTful API
    Contentful
    styled-components
    SCSS
    Material UI
    Bootstrap
    JavaScript
    TypeScript
    Gatsby.js
    Node.js
    React
  • $70 hourly
    With over 10 years of experience in software development, I started my career as a full stack developer due to practical project requirements and have acquired skills in React, Node.js, JavaScript, TypeScript, Python, Django, Solidity, and Web3. I enjoy building software products and have experience working both alone and as part of an agile team. I am committed to working full-time to meet the client's requirements on time. My Skills: • React, Next.js, Gatsby.js • Material UI, Styled-Component • Node.js, Express.js, Strapi CMS • JavaScript, TypeScript, HTML, CSS • Python, Django, Flask • Solidity, Web3.js, Ethereum, Polygon • Rust, Solana/Web3.js, Solana • Jest, Enzyme, Cypress • MySQL, PostgreSQL, MongoDB, DynamoDB • RESTful API, JSON • GraphQL, Apollo, Hasura • GitHub, Bitbucket, GitLab • AWS, GCP, Terraform, Docker, Kubernetes, CI/CD I am process-oriented, and my clients find this helpful in delivering projects successfully and adhering to timelines. I look forward to working on exciting projects with you!
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Solana
    Ethereum
    Solidify
    Blockchain
    CI/CD
    RESTful API
    Rust
    Git
    Docker
    Django
    Python
    PostgreSQL
    MySQL
    Node.js
    React
  • $60 hourly
    PROFESSIONAL PROFILE A highly motivated Senior Software Engineer with 7 years of experience that enjoys challenges and pushing the envelope. I specialize in creating responsive web applications at an enterprise level that are scalable and maintainable. Experienced with all stages of the development cycle for dynamic web projects. I work well with others and know how to take ideas and concepts from UX Designers and project managers, and make them into reality.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    JavaScript
    HTML5
    Next.js
    Front-End Development
    Node.js
    Vue.js
    CSS
    Angular
    React
    AWS Lambda
    RESTful API
    MySQL
    Python
    GraphQL
    Back-End Development
  • $35 hourly
    If you’re looking for detail oriented and precise work, let’s work together! If you’re also looking for programmer with clean coding and scripting skills and free of bugs/easy to debug for future developers I am an expert in python and C with background in healthcare and research, meaning if you don't exactly know how to solve a problem, I can do the research to figure out the best and most efficient way to doit If you also need me to clean up your front end using HTML, CSS, I got you! Frameworks I am familiar with: beautifulSoup, scrappy, selenium, google cloud, and excel. Thorough communication is crucial step in working together, so let’s chat about your needs!
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Google Cloud Platform
    Selenium
    Data Mining
    Beautiful Soup
    Blockchain
    Data Engineering
    RESTful API
    JSON
    CSV
    Data Extraction
    Data Entry
    Data Scraping
    Microsoft Excel
    Data Visualization
    Python
  • $60 hourly
    I have many different skills in software development including: data analysis, SQL Development, Front-End Development, Services development, requirements gathering and much more. I have a full time job working as a data analyst at a Fortune 200 company. I've worked on many different projects over the last 9 years since graduating from college with my degree in Business Intelligence and Analytics. Some of my areas of focus are working with technologies like SAS (Statistical Analytical Software), Python, SQL, Javascript, and NIFI.
    vsuc_fltilesrefresh_TrophyIcon Backend Rest API
    Flask
    Chart.js
    RESTful API
    Data Scraping
    Data Mining
    JavaScript
    Analytics
    Apache NiFi
    Data Science
    Data Analytics
    Tableau
    SAS
    Python
    Business Intelligence
    Data Analysis
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