Chrome Extension Full-Stack JavaScript Developer

@vishal1145

Your Phase 2 expansion will fail if the extension's background service worker doesn't properly handle Chrome's 5-minute idle timeout - I've seen this kill three production automation tools that worked perfectly in testing but crashed under real user loads. Before architecting the solution, I need clarity on two things: What's your current strategy for maintaining persistent connections when Chrome suspends the service worker? And are you handling rate limits from the target sites, or are you seeing IP blocks during peak automation runs? Here's the architectural approach: - CHROME EXTENSION + TYPESCRIPT: Refactor manifest V3 architecture with alarm-based persistence and offscreen documents to bypass service worker limitations that cause automation failures after 30+ minutes of runtime. - NODE.JS + EXPRESS: Build a job queue system using Bull/Redis to distribute automation tasks across multiple browser instances, preventing bottlenecks when scaling from 100 to 10K daily operations. - BROWSER AUTOMATION: Implement stealth plugins and randomized user behavior patterns (mouse movements, typing delays) to reduce detection rates by anti-bot systems from 40% to under 5%. - CAPTCHA HANDLING: Integrate 2Captcha/Anti-Captcha APIs with retry logic and fallback strategies to maintain 95%+ solve rates without manual intervention. - MONGODB OPTIMIZATION: Design a schema with TTL indexes for session data and compound indexes on automation logs to handle 50K+ daily workflow executions without query degradation. I've built 8 production Chrome extensions including two that process 200K+ automated actions monthly. I don't take on projects where the anti-detection strategy isn't bulletproof - let's schedule a 15-minute technical call to review your current detection rates and discuss Phase 2 edge cases before committing to the build.

@kaustubhbawa123

Hi, I am an IIT Grad, MongoDB Certified Developer, ex-BFSI and worked at fortune 500 companies. I will make it a reality for you. As a Full Stack Developer, I will leverage my experience in building Chrome Extensions with Node.js, Express backend, and JavaScript/TypeScript to enhance the existing system, incorporating browser automation and CAPTCHA handling to optimize complex workflows, while ensuring secure API integrations and thorough debugging and optimization. Kindly click on the chat button so we can discuss and get started. Will share you my prior projects done and my resume too. I have been doing freelancing since 2019 worked at top MNCs in both USA and India. Lets connect

@santoshkumars17

With over 5 years of experience, I have a deep understanding of both the frontend and backend development, specializing in JavaScript and Node.js, which are vital skills for this project. To highlight my relevant experience, I have not only built Chrome Extensions before, but also worked extensively with browser automation and dealing with complex workflows. Also as a nice to have skill, I am experienced with Puppeteer and Playwright which adds value to the project. Added to that, I can work well with integration of APIs that will be useful for expanding your existing system. Specifically talking about CAPTCHA handling and automation, I have faced and successfully overcome similar challenges in the past. Moreover, my familiarity with authentication flows ensures that there will be no hiccups while dealing with user profiles. Last but not least, my commitment to delivering clean code on time is something that sets me apart. The successful delivery of your Phase 2 project within a month timeframe wouldn't be just another task for me; it would

@hr157

Hi, I can support development across both the Chrome extension layer and the Node.js backend, ensuring the workflows remain reliable as complexity grows. With 10+ years of full-stack JavaScript development experience, I’ve worked on projects involving browser automation, API integrations, workflow systems, and debugging complex client-side logic, which aligns well with your requirements. Relevant Experience Chrome Extension Development • Built extensions using Manifest V3 with background/service workers • Content scripts interacting with dynamic web pages • Messaging between extension UI, background scripts, and backend APIs • Handling authentication flows and secure token storage Browser Automation • Experience building automation tools using Puppeteer and Playwright • Automating multi-step workflows in browser environments • Handling dynamic DOM elements and asynchronous actions • Performance tuning and debugging automation scripts Backend • Node.js / Express APIs for automation control and task management • Integration with third-party APIs and authentication services • Workflow orchestration and data handling for browser automation tools What I can contribute to Phase 2 • Expand extension logic and workflow automation • Optimize existing scripts for stability and performance • Build or enhance Node.js APIs supporting automation • Improve error handling and monitoring • Ensure the system scales reliably as usage grows Let's chat!

@abdf2010

Hello. I came across your project, Chrome Extension Full-Stack JavaScript Developer and it aligns well with my background. I have hands-on experience with JavaScript, Google Chrome, Node.js that's directly relevant here. Feel free to reach out if you have questions.

@mutahrar

Hello, I’m very interested in contributing to Phase 2 of your browser automation project. With strong expertise in JavaScript and TypeScript, I have built Chrome Extensions and browser automation tools that handle complex workflows and integrate seamlessly with backend APIs. I have experience with Node.js/Express backends, automating browser tasks, and optimizing scripts for performance and reliability. My approach focuses on writing maintainable, scalable code while ensuring smooth extension functionality and robust automation logic. Additionally, I have experience dealing with CAPTCHA and anti-bot mechanisms, and I’m comfortable integrating Puppeteer or Playwright for advanced automation. I can work efficiently on Phase-2 features and ensure timely delivery within your 1-month timeline, while maintaining high code quality. I am keen on long-term collaboration if the project grows and requirements expand.

@ahmetTC

Hope you are doing well! Lets start! Expanding an existing production Chrome Extension automation system with improvements to extension logic, backend APIs, and browser workflow automation. Common challenges in such systems include extension permission conflicts, unstable DOM selectors, authentication session handling, and anti-bot protection interruptions; these are typically handled through resilient selectors, background service workers, retry logic, and optimized API communication with the Node.js backend. Strong experience building Chrome Extensions using JavaScript/TypeScript with Node.js/Express backends for workflow automation and API integrations. One automation project required browser interaction across multiple dynamic pages; unstable selectors initially broke the flow, resolved by implementing mutation observers and fallback selectors. Another project involved scheduling automation where CAPTCHA interruptions occurred; integrating Playwright with adaptive delays and token-based solving services stabilized the workflow and reduced failures significantly. Additional work includes building scalable backend APIs, authentication handling, and debugging automation scripts for performance and reliability. Portfolio and GitHub examples of automation tools and extensions can be provided during discussion. I know what do I build for you, can complete it to your full satisfaction within your timeline. I am ready for you and waiting here. Thank you.

@MagCloud

Hello, With my expertise in Node.js, JavaScript/TypeScript, Chrome Extension Development, and general Full-Stack JavaScript development gleaned from my years at MAG Cloud Solutions, I am perfectly poised to help you navigate the intricacies of this project. Not only do I have hands-on experience designing and developing Chrome extensions from scratch, but I have an established track record of creating substantial utility and value for diverse businesses with them. You can get a glimpse of some of the extensions integrated with third-party services on my GitHub profile link [insert link here], providing both reliability and elegance - crucial factors for browser automation tools. Moreover, my proficiency in Node.js and Express backend will ensure a solid and scalable foundation for the backend APIs essential for your current need. Having previously worked on projects requiring handling of complex workflows in browser environments, CAPTCHA handling automation, API integrations etc., I can confidently optimize automation scripts while making sure that your specifications are fully met. This knowledge also extends to Puppeteer/Playwright tools, authentication flows and building scalable backend services that might come handy given the expanding nature of your project. Long-term engagement is always one of your possibilities when you partner with me, as testified by my consistent delivery of high-quality service. Regards Mohit

@paruls154

Hi As an experienced Full-Stack JavaScript developer, I bring a comprehensive skill set tailored precisely to your Chrome Extension project's requirements. Over a decade in the field, I have not only built Chrome Extensions but have extensive experience with browser automation and complex workflows in browser environments. I'm also well-versed in Node.js and Express backend development, ensuring I can handle not only extension logic but also backend APIs, exactly what this project needs. Additionally, my experience in handling CAPTCHA and other anti-bot systems further proves my competency to optimize automation scripts. Let's make things happen! Regards Parul Saini

@geethasekar1995

I am a senior developer of ASP.NET Core MVC & CMS & ASP.NET & Java with over 8 years of experience in software development. I am an expert on windows and web development using C#, VB.NET, VB6, ASP.NET, Entity Framework, Spring Boot. I work with ASP.NET, Core, MVC, Web API, WebServices, WCFServices, Webform, SQL Server, MongoDB, MySQL, Crystal Report, RDLC, SSIS, SSRS, HTML, CSS, Javascript, TypeScript, Jquery, AJAX, Angular, TFS, SVN, Github, GitLab, Azure, Plesk, Angular, Angular2, Javascript, HTML, CSS, JQUERY. Mobile - Andriod native java, Flutter, Kotlin, Xamarin I use the Repository Pattern, Onion Architecture, Domain-Driven Design Architecture & Dependency Injection Design Pattern. I follow the SOLID principle. When working on a project with you, I like to keep in touch so we both have a clear understanding of our needs and vision of the project we are creating together. I deliver a quality product on time and on budget. Client satisfaction is my main goal.

@MQamar123

As an accomplished full-stack developer with specialization in JavaScript and Node.js, I strongly believe that my skillset aligns seamlessly with your requirements for creating a functional, efficient, and scalable Chrome extension. Over the past seven years, I've successfully handled numerous projects across various domains, boasting an extensive understanding of web and app development. Through my experiences, I've become adept at handling complex workflows within browser environments--making me an advantageous asset for your project. Regarding browser automation and CAPTCHA/anti-bot solutions, I have a proven track record of developing customized tools that streamline repetitive tasks while effectively overcoming various security measures. With my strong grasp of Puppeteer/Playwright, I can take the Chrome extension you already have to new heights by optimizing automation scripts and maximizing efficiency in backend services. I understand the pivotal nature of this project in its long-term commitment potential and the need to deliver immaculate Phase-2 features within tight timelines. As someone who highly values client satisfaction, rest assured that choosing me will mean entrusting this important work to a seasoned professional who understands that "good quality" means flawless delivery. I look forward to taking on this challenge with you!

@amaank66

Hello, I would be glad to support the Phase-2 expansion of your existing Chrome-extension automation system. I have strong experience with **JavaScript/TypeScript, Chrome Extension development (Manifest V3), and Node.js/Express backends**, building production tools that automate complex browser workflows and integrate with external APIs. I have developed **browser automation solutions using Puppeteer and Playwright**, including content scripts, background workers, extension-backend communication, and workflow automation for data extraction, form submission, and scheduling systems. I also have experience handling **authentication flows, dynamic page interactions, and anti-bot challenges**, focusing on stability, logging, and performance optimization. For Phase-2, my approach would be to review the current architecture, **refactor extension logic where necessary, extend automation workflows, and strengthen backend APIs** that support the system. I also prioritize **robust error handling, monitoring, and debugging tools** to ensure automation runs reliably in production environments. I am comfortable working with existing repositories and collaborating closely to deliver the required **Phase-2 features within the 1-month timeline**. I can share **Chrome extension examples, automation projects, and GitHub links** during our discussion. Best regards, Amaan Khan P. CUBEMOONS PVT LTD.

@Hemantt841

Hi, I see you need a Full-Stack JavaScript developer to expand your existing Chrome Extension and browser automation system in Phase 2. You’re looking for someone who can handle complex workflows and has experience with both frontend extension logic and backend APIs. Your project requires improving browser automation with JavaScript/TypeScript, Node.js/Express backend, and possibly CAPTCHA handling. The focus on debugging and optimizing automation scripts, along with API integrations, means you need a developer who can maintain and scale your current system efficiently. I’ve built Chrome Extensions with complex automation workflows using Puppeteer and Playwright, integrated backend APIs with Node.js, and handled CAPTCHA challenges in automation scripts. One project involved creating a scheduling automation tool with browser interaction and user authentication flows, which directly relates to your requirements. I can deliver the Phase 2 features within 4 weeks, ensuring thorough testing and optimization. Let’s discuss the details so I can align my work precisely with your goals.

@Visharaa2024

I am an experienced Full-Stack JavaScript developer with extensive experience building Chrome Extensions and browser automation tools. I have worked on production-grade extensions and backend systems using Node.js/Express, handling complex workflows, API integrations, and automation scripts. I am proficient in JavaScript/TypeScript and have hands-on experience with Puppeteer/Playwright for browser automation, including CAPTCHA handling and authentication flows. I can optimize existing scripts, extend extension logic, and implement Phase-2 features reliably. I can deliver the required functionality within 1 month, ensuring clean, maintainable code and seamless integration with your current system. Links to my GitHub and prior Chrome Extension projects are available upon request. I am open to long-term collaboration for future phases.

@Sudhi190

Hi there, You're absolutely in the right place. I’ve successfully delivered similar projects multiple times and understand exactly how to execute this efficiently and correctly from day one. To properly lock down the scope, timeline, and pricing, I need to ask you a few key questions. Unfortunately, Freelancer’s 1500 character limit doesn’t allow me to explain everything clearly here. Let’s jump on chat, where I can: Show you my proven past work Walk you through the real results I’ve delivered Share a clear, step-by-step action plan for your project You’ll immediately see why my approach is different, practical, and effective. If you’re serious about getting this done the right way, I’m ready to move forward. Looking forward to connecting and winning together Cheers, Sudhi

@robertw0802

Hi there,\n\nI'm Robert, a Senior Full-Stack & AI Engineer with over 10 years of experience architecting and delivering SaaS platforms, automation systems, and intelligent applications. My top strengths include full-stack development with JavaScript/TypeScript, backend expertise in Node.js/Express, and a strong background in browser automation tools and Chrome Extension development.\n\nI recently built a Chrome Extension for a client that automated complex data workflows and integrated seamlessly with various APIs, which is directly in line with your project needs. With my deep technical expertise in handling browser environments and CAPTCHA automation, I can complete this project perfectly and deliver scalable, production-ready results.\n\nI am committed to clean architecture, structured documentation, CI/CD automation, and adhering to security best practices. Let's connect to refine your requirements and begin building a solution that exceeds expectations. Could you clarify any specific features or improvements you're looking to implement in Phase 2?

@mariamz24

Hi, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on JavaScript, Google Chrome, Node.js, Typescript, MongoDB, Automation Please come over chat and discuss your requirement in a detailed way. Thank You

@algdevpro

Hi there! Your project looks like a great fit for my skillset. I specialize in: - Full-stack web & mobile development - JavaScript, TypeScript, React, React Native - Node.js backend & APIs - Python/Django, PHP/Laravel - Vue.js, Angular, Flutter - Database design (PostgreSQL/MongoDB) - AWS Lambda & cloud solutions 10+ years professional experience, 100+ completed projects. I can deliver this within 5-7 days for $22000. Let's make it happen! Best regards, Alex

@Athaxva

With a solid background in developing powerful JavaScript applications, I have leveraged my skills to build a profitable website earning over 20 lakh per month. I have hands-on experience in building browser extensions and have successfully deployed one on the Chrome developer portal. Working in an environment where automation is key, I'm well-versed in Node.js and proficient in handling complex browser workflows. I understand that the project requires extensive experience in browser automation and CAPTCHA handling; both are areas where I excel. I have deep knowledge of various automation tools including Puppeteer, which can enable us to overcome any challenges that may arise during the project. My past projects also incorporated API integrations and backend development, two crucial aspects for Phase 2 of your venture. Lastly, having demonstrated my ability to deliver results within tight deadlines without compromising quality, I firmly believe I'll be able to complete all required Phase 2 features within a month. Given my strong track record combined with your project specifications and requirements, I am confident that our partnership will lead to long-term success. Let's discuss this project further on how we can take it to the next level.