Hire the best JavaScript Developers in Madison, WI
Check out JavaScript Developers in Madison, WI with the skills you need for your next job.
- $100 hourly
- 4.9/5
- (30 jobs)
I've been a professional developer at established software companies for the past 10 years, using languages like JavaScript, Ruby, PHP, and accompanying technologies like Node.js, MySQL, and Rails. Presently I am most interested in working on small-to-medium projects that solve an existing problem in your business, but I'm open to longer-term or more speculative projects as well.
JavaScript
ZapierBash ProgrammingSQL ProgrammingNode.jsPython ScriptTypeScriptNext.jsReactRuby on Rails - $60 hourly
- 5.0/5
- (1 job)
Senior Full-Stack Engineer with over 10 years of professional experience in commercial application and software development. 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐋𝐢𝐛𝐫𝐚𝐫𝐢𝐞𝐬 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Proficient in widely-used JavaScript frameworks such as React/Next.js, Vue, Angular, Svelte, and Ember.js. Using these frameworks, I develop dynamic single-page applications (SPAs) that deliver a seamless user experience. 𝐅𝐫𝐨𝐧𝐭-𝐞𝐧𝐝 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: Skilled in modern front-end technologies including HTML5, CSS3 (with CSS Grid and Flexbox), and JavaScript (ES6+). I excel at creating responsive, interactive, and visually stunning user interfaces. 𝐁𝐚𝐜𝐤-𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Experienced in server-side programming with expertise in Node/Express/Nest/Fastify, Python (Django/FastAPI). I develop robust APIs and implement intricate business logic. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐏𝐫𝐨𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲: Knowledgeable in database management systems, including relational databases (MySQL, PostgreSQL) and NoSQL databases (MongoDB, Redis). I ensure optimal database performance and data integrity. 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: Proficient in integrating third-party APIs and web services to enhance the functionality of web applications, including payment gateways, social media APIs, and more. 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭: Skilled in DevOps methodologies, including continuous integration and continuous deployment (CI/CD). I use tools like Docker and Kubernetes for containerization and orchestration, ensuring smooth deployments. 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧: Focus on web application security by implementing best practices and security measures. I apply performance optimization techniques such as code splitting, lazy loading, and server-side rendering (SSR). 𝐕𝐞𝐫𝐬𝐢𝐨𝐧 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 𝐏𝐫𝐨𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲: Experienced with Git and collaborative platforms like GitHub or Bitbucket for version control and team collaboration. Committed to creating visually appealing, scalable software, developing innovative solutions, and fostering professional relationships. I'm excited to collaborate with you and bring my skills to your company and team. Let's connect!
JavaScript
API IntegrationCSSHTMLPHPJSONAdobe XDphpMyAdminMongoDBPostgreSQLMySQLAngularNuxt.jsVue.jsFastAPIDjangoPythonTypeScriptNode.jsNext.jsReactMERN Stack - $75 hourly
- 5.0/5
- (40 jobs)
Full-Stack Developer specializing in WordPress, Shopify, VueJS, NodeJS, JavaScript, and NuxtJS. Experienced in Email Template Development and integrating Email Marketing Platforms like Klaviyo, MailChimp, and Pardot. Driven individual with a passion for learning new technologies and completing challenging projects. Skilled in troubleshooting and debugging code efficiently. Eager to work on your exciting projects!
JavaScript
Web DesignHTML5Shopify TemplatesHTMLProgressive Web AppForm DevelopmentWordPressPythonCSSVue.jsNode.jsSQLEmail Template Development - $60 hourly
- 5.0/5
- (10 jobs)
I am an automation and data modeling expert with a lean six sigma green belt and a passion for uniting robots and humanity: I use data and analytics to help companies make their best decisions. As a professional Supply Chain Planner with a coding background in SQL and JavaScript, I work with large amounts of data and I've automated dozens of workflows and systems saving time, money, and labor that would have otherwise been used inefficiently. 🤖 🎯 𝐅𝐫𝐨𝐦 𝐦𝐞𝐧𝐢𝐚𝐥 𝐭𝐨 𝐦𝐞𝐚𝐧𝐢𝐧𝐠𝐟𝐮𝐥 My goal is to help you grow deeper with your data, both in terms of gaining deeper insights to power your business, as well as in helping to automate and streamline much of the manual tasks and reporting that increase the administrative overhead. If you're finding that your time is being used to repeat the same tasks every day, or you're finding it difficult to quickly and efficiently gather meaningful business intelligence in making sense of your team's data, I want to help you in handing those tasks over to machines that can do the work for you while you sleep—not only saving you time, but generating deeper insights for your business. 💡 𝐑𝐞𝐚𝐥 𝐩𝐫𝐨𝐛𝐥𝐞𝐦𝐬 𝐭𝐡𝐚𝐭 𝐈'𝐯𝐞 𝐬𝐨𝐥𝐯𝐞𝐝 ✔ Supported one of the world's leading space companies by working within their data warehouse to develop numerous big data reports using SQL and dimensional modeling in Excel and Power BI, providing ongoing visibility into key metrics such as purchase requisitions, purchase orders, production orders, shortages and inventory. ✔ Automated a daily sales pipeline report from SalesForce into a spreadsheet to calculate projected shipments that were tagged as having at least a 60% probability of success to close against total projected sales. ✔ Implemented a code that automated credit card expenses from email notifications into specific columns of a budget tracker, creating new lines for every purchase every 2 hours. ✔ Developed a button that would automatically copy/paste all expenses within a defined period to a data warehouse for financial reporting, cleaning and preparing the expense sheet for new entries. ✔ Created a sales forecasting algorithm comprised of SQL which is set to run various scenarios, self-selecting the scenario which renders the least probability of forecast error relative to each product's previous monthly performance. Embedded within the algorithm is a combination of rolling forecasts and exponential smoothing modeling with varying alphas to aid in predicting accurate future values. ✔ Using JavaScript, implemented scripts within Google Sheets that auto-update data in the middle of the night so that numerous reports stays fresh without the need to manually update. ✔ Created a clickable button that allowed a Merchandising team to autogenerate an emailed .csv attachment of data from a specific sheet within a workbook. ✔ Using an API to access data from the Federal Reserve, I established a rolling annual inflation calculation in a personal budget to show rising/falling inflation percentages. ✔ Developed an automated report that sends itself to a vendor every week showing the total breakdown of on-hand inventory, embedded with SQL that displays visuals showing the total percentage of goods sold. ⚙️𝐖𝐡𝐚𝐭 𝐭𝐨 𝐞𝐱𝐩𝐞𝐜𝐭: Nicknamed "The Watchmaker" by a former VP, my approach is meticulous, thoughtful, and well-designed. I have experience on the front lines with customers as well as on the back end with systems. Whether I'm building a dashboard, automating a simple workflow, or constructing a formula, I want the end product to be simple and robust. If you need help getting your data to work for you, or to have your data tell an interesting story, reach out and fill me in on your project. I'd love to help! 📞 Receive a response in 24 hours or less 💻 Free consultation 🏆 100% Job Success Score
JavaScript
Spreadsheet MacrosGoogle CalendarData AnalysisSQLGoogleSystem AutomationSpreadsheet AutomationGoogle Sheets AutomationMicrosoft ExcelDashboardGoogle Apps ScriptGoogle DocsAutomationGoogle Sheets - $50 hourly
- 0.0/5
- (0 jobs)
Aricin is a full-stack developer with 3+ years of experience working with small businesses and startups. His expertise includes building and maintaining large-scale web applications using technologies like JavaScript, Python, Next.js, React, AWS, SQL, and relational databases. Aricin also specializes in technical SEO, web vitals, and site performance optimization. - Proficient in JavaScript/TypeScript, Python, Next.js, Node.js, React.js, Django. - Experience with AWS, Docker, GitHub Actions, Relational Databases.
JavaScript
Website Performance OptimizationNext.jsMicroserviceREST APIMachine LearningFirebaseMongoDBRelational DatabaseAWS LambdaReactNode.jsDjangoPython - $70 hourly
- 4.0/5
- (4 jobs)
I am a highly skilled epidemiologist with 40 years of experience in epidemiologic research and taught epidemiology at several universities. I have a PhD and MPH in epidemiology and have written textbooks on epidemiology with over 100 peer-reviewed publications. I have taught introductory epidemiology, intermediate, and advanced including topics such as use of statistical software, logistic regression, linear regression, general linear modeling, survival analysis, complex survey designs, and other multivariable methods. Extensive knowledge of SAS, SPSS, Epi Info, Excel, Google Sheets, and experience with Stata, R/R Studio, Java, and JavaScript. I have worked at the State Health Department level, at CDC, and performed consultancies for WHO, UNICEF, and many other international and bilateral agencies. I am available for data analysis, systematic reviews, disease modeling, forecasting, writing/reviewing publications and grants.
JavaScript
Microsoft OfficeScientific ResearchScientific WritingBiostatisticsClinical TrialPublic HealthEpidemiologyIBM SPSSRStatisticsGoogle SheetsSASStataMicrosoft Excel - $30 hourly
- 5.0/5
- (1 job)
Experienced Web Developer | Specializing in Small and Medium-Sized Business Websites | Let's Build Your Online Presence Skilled developer specializing in creating websites for small and medium-sized businesses. Expertise in delivering tailored solutions, whether it's showcasing your services, winning new clients, or establishing an online store. Dedicated to crafting user-friendly and visually appealing websites that drive results. Proficient in HTML, CSS, JavaScript, and modern frameworks to create responsive and interactive websites. Experienced in integrating e-commerce functionalities, payment gateways, and inventory management systems. Strong attention to detail, ensuring high-quality deliverables and meeting project deadlines. Collaborative approach, working closely with clients to understand their unique needs and goals. Let's work together to create an impactful online presence for your business. Contact me to discuss your project.
JavaScript
FlutterPostgreSQLMongoDBMySQLDjangoLaravelNode.jsPHPVue.jsNext.jsTailwind CSSCSSHTMLReact - $45 hourly
- 0.0/5
- (0 jobs)
I am a computer science and finance double major at the University of Wisconsin - Madison interested in financial software development. I also enjoy designing, prototyping, and building user interfaces and experiences. I also have experience producing and editing educational videos, creating graphics and animations, and audio editing.
JavaScript
NotionAudio EditingVideo ProductionCamtasiaReactMicrosoft ExcelFigmaSQLCSSHTML.NET FrameworkGitJavaPython - $50 hourly
- 0.0/5
- (0 jobs)
I'm a developer experienced in building websites for small business and automating processes with Python scripts for medium-sized businesses.
JavaScript
SoftwareReactResponsive Design - $75 hourly
- 0.0/5
- (0 jobs)
Blockchain Developer focused on building secure and scalable decentralized solutions. Experienced in creating custom smart contracts, dApps, and DeFi solutions. Proficient in Solidity, Ethereum, Binance Smart Chain, and Polygon. Skilled in developing NFTs, ERC20 tokens, and cross-chain bridges for seamless interoperability. Dedicated to delivering secure, efficient, and innovative blockchain solutions tailored to client needs. Results: - Successfully launched and managed multiple NFT collections with secure smart contracts. - Developed and deployed various ERC20 tokens and DeFi protocols, including yield farming and staking solutions. - Designed and implemented cross-chain bridges for seamless token and NFT interoperability across different blockchains. - Conducted thorough smart contract audits, reducing vulnerabilities by 30% and ensuring increased security. Results Successfully launched and managed multiple NFT collections with secure smart contracts. Developed and deployed various ERC20 tokens and DeFi protocols, including yield farming and staking solutions. Designed and implemented cross-chain bridges for seamless token and NFT interoperability across different blockchains. Conducted thorough smart contract audits, reducing vulnerabilities by 30% and ensuring increased security. My Services: - Smart Contract Development (Solidity, Ethereum, Binance Smart Chain, Polygon) - NFT Development & Launch (ERC721, ERC1155) - DeFi Solutions (Token Creation, Yield Farming, Staking) - Cross-Chain Bridges (NFT & Token Wrapping) - Decentralized Application (dApp) Development - Smart Contract Audits & Security Reviews - Web3 Integration (Metamask, WalletConnect) If you're ready to get started or have any questions, feel free to reach out!
JavaScript
RustTokenomicsCryptocurrencyDeFiReactSolanaEthereumSmart ContractSolidityweb3.jsBlockchain DevelopmentWeb3BlockchainNFT - $45 hourly
- 0.0/5
- (0 jobs)
I’m a full-stack web developer with over 6 years of professional experience building and modernizing web applications. My primary focus is on delivering fast, user-friendly interfaces backed by robust, scalable back-end systems. I specialize in transforming complex requirements into intuitive, high-performing solutions that help businesses thrive online. Front-End Expertise * ReactJS (Hooks, Context, Redux if needed) * JavaScript/TypeScript * Transforming UI/UX designs into responsive, engaging websites * HTML5/CSS3 with best practices for maintainable and accessible code Back-End Skills * Python & Django for building RESTful APIs and dynamic back-end systems * Database Integration: Proficient with RDBMS/SQL and NoSQL (Couchbase) * Expertise in Authentication & Security: Implementing JWT, OAuth, and other secure protocols * Performance Optimization: Reducing load times with caching strategies and efficient database queries
JavaScript
REST APIDjangoReactPythonWeb ApplicationWeb DevelopmentScriptingQuality AssuranceSoftware QA - $80 hourly
- 0.0/5
- (0 jobs)
I am a senior full-stack engineer with 8 years of solid experience in web & software development. Over the past 8 years, I built & designed numerous websites, web apps, desktop apps. I also worked as a CTO & CEO for several companies, including Infinite Holdings LLC, where I worked with many local clients to achieve their goals. Here you can find my primary skillsets: - Website/Web app Front-end Development using modern JavaScript languages including React, Angular, and Vue.js. (React, Redux(saga | thunk), React-hooks, Storybook, Angular, NgRx, Rxjs, Vue/Vuex) - Back-end development using Node.js, Express.js, Nest.js, Python, and Ruby on Rails - RESTful API, GraphQL, Apollo, 3rd Party API integration - OAuth, Auth0, JWT - Database management & design (MySQL, MSSQL, Postgres, MariaDB, MongoDB) - AWS, Azure, Serverless, Amplify, GCP, Firebase, Cloud Functions - CI/CD, Pipeline, Docker, Kubernetes - Project management tools (Git, Github, Jira, Bitbucket, Gitlab, Trello, Asana) I always follow the best practices and write clean and reusable code and components. One of my advantages is pixel-perfect implementation and API integration. I am interested in long-term projects with full-time opportunities. Open to any tasks! Feel free to schedule a call to get more information. Thank you!
JavaScript
HTML5UI/UX PrototypingCSS 3TypeScriptAWS LambdaAPI IntegrationNode.jsReactAdobe Photoshop - $80 hourly
- 0.0/5
- (0 jobs)
I’m a frontend developer with experience building websites and integrating them with marketing 360 marketing solutions and payment processors. I can help you with all aspects of your project.
JavaScript
EcommerceStripeSalesforceHubSpotjQueryWordPressDrupalTailwind CSSPHPHTMLWeb Application Want to browse more freelancers?
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