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Senior Ruby on Rails Developer (12+ yrs) specializing in SaaS , eCommerce and edTech. I help startups and enterprises build scalable, secure, and high-performance applications with clean, maintainable code that drives growth. 👉 Ruby on Rails • Python • React • JavaScript • Web Design • API Development • Custom E-Commerce Solutions • Database Design and Architecture (PostgreSQL/MongoDB/Redis) • AI App Development & Integrations • AWS Services • SaaS Development • Custom Payment Gateways • Software Architecture & Scaling. ✅ How I Help My Clients ● Backend Development (Ruby on Rails) – Built secure, high-performance APIs for SaaS & fintech apps handling 10K+ users with 99.99% uptime. ● Frontend Development – Delivered responsive UIs with React, Next.js, TailwindCSS & Hotwire/Stimulus, improving engagement & conversions. ● E-Commerce Solutions – Customized Spree Commerce, Shopify, and Sharetribe stores that boosted sales and retention. ● DevOps & Cloud – Automated deployments via CI/CD (GitHub Actions, Docker, AWS, Heroku), cutting release cycles by 40–50%. ● System Architecture – Designed and scaled multi-tenant SaaS platforms, ensuring long-term reliability and growth. ● AI Automation & Model Training – Built AI-driven workflows, trained and integrated predictive models, and automated decision pipelines to improve efficiency, accuracy, and business outcomes. 🏆 Recent Highlights ✔️ Architected a Spree Commerce platform that increased conversions by 30%+. ✔️ Revamped a legacy Rails app with Hotwire + TailwindCSS, improving performance and UX. ✔️ Built a SaaS dashboard with role-based access, scaling to thousands of users. ✔️ Integrated AWS services for high-availability, API-driven applications. ✔️ Implemented GitHub Actions pipelines, reducing deployment time from hours to minutes. ✔️ Designed and integrated AI-powered automation and predictive models to streamline workflows and enable data-driven decision-making. 💼 Industries I Serve 📌 Ecommerce & Retail Tech – Spree, Shopify, Sharetribe customizations 📌 EdTech & Online Learning – Multi-tenant learning platforms 📌 Healthcare & MedTech – Secure, HIPAA-compliant Rails solutions 📌 PropTech & Real Estate – Data-driven dashboards & automation 📌 SaaS Platforms – Subscription-based, multi-role web applications 🌟 Why Clients Work With Me ✨ Clean, maintainable, and future-proof code ✨ Scalable architecture & reliable deployments ✨ Transparent communication & on-time delivery ✨ Long-term support & continuous improvements ⭐ Clients consistently rate my work 5★ for reliability, quality, and long-term value. 🚀 Let’s discuss how I can help turn your idea into a high-performance web application that scales with your business.

🚀 SaaS & AI Full-Stack Developer | Ruby on Rails | API Integrations | DevOps I help startups build, improve, and scale SaaS products that are fast, stable, and ready for real users. Over the last 10+ years, I’ve worked on live SaaS platforms, AI-powered applications, automation systems, APIs, and cloud deployments for startups and growing businesses. Most clients work with me when they need someone who can: • Fix and improve an existing product • Build new SaaS features quickly • Integrate APIs and AI tools • Handle backend + deployment without managing multiple freelancers • Scale applications for growing users and traffic ━━━━━━━━━━━━━━━━━━ WHAT I WORK ON ━━━━━━━━━━━━━━━━━━ ✅ Ruby on Rails SaaS Development * Multi-tenant SaaS platforms * Subscription & Stripe billing systems * Admin dashboards * Scalable backend architecture ✅ AI & Automation * OpenAI / AI integrations * AI-powered workflows and automation * Chat systems & intelligent assistants * Data processing and automation pipelines ✅ API Integrations * REST APIs * Third-party integrations * Payment gateways * CRM and external platform integrations ✅ DevOps & Cloud * AWS / GCP / Heroku deployments * Docker & CI/CD pipelines * Server optimization * Production debugging and scaling ━━━━━━━━━━━━━━━━━━ RECENT PROJECTS ━━━━━━━━━━━━━━━━━━ ✔ Built and scaled an EdTech SaaS platform with thousands of active users ✔ Developed API systems supporting high daily traffic with stable uptime ✔ Automated business workflows reducing manual operations significantly ✔ Improved deployment systems using Docker and CI/CD automation ✔ Worked on drone-related software systems and backend integrations ━━━━━━━━━━━━━━━━━━ WHY CLIENTS LIKE WORKING WITH ME ━━━━━━━━━━━━━━━━━━ ✔ Strong communication and quick updates ✔ Focus on long-term product growth ✔ Clean and maintainable code ✔ Able to work independently without constant supervision ✔ Available for long-term collaboration I’m available for 5–8 hours per day, Monday to Thursday. If you need someone who can understand both the technical side and the product/business side of your SaaS project, feel free to send me a message or invite. I usually respond quickly.

I’m a 46 x ⭐️⭐️⭐️⭐️⭐️Certified Salesforce and HubSpot Expert (trailblazer.me/id/divschauhan), Top 1% Expert-Vetted on Upwork, and a 3-time Dreamforce Hackathon Winner, with strong experience in AppExchange product development and active roles as a Salesforce Community Group Leader and Trailhead Answers Leader. ⭐️ Core skills include: ✅ Salesforce Implementation ✅ Salesforce Administration ✅ Sales Cloud ✅ Service Cloud ✅ Financial Services Cloud ✅ Experience Cloud ✅ Marketing Cloud ✅ Salesforce Maps ✅ Flow Builder ✅ Reports & Dashboards ✅ Lightning Pages ✅ Data Migration ✅ CPQ ✅ Commerce Cloud ✅ Agentforce I have worked with 🌟High Profile Clients🌟 in my Salesforce Career: ✅ Yamaha Motors(Fortune 500 Company) ✅ Ticket Master (~100 Million Estimated Revenue per Year) ✅ Lloyds Pharmacy(~150 Million Estimated Revenue per Year) 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: ✅ Salesforce Certified MuleSoft Developer II ✅ Salesforce Certified B2C Commerce Developer ✅ Salesforce Certified MuleSoft Developer I ✅ Salesforce Certified B2C Solution Architect ✅ Salesforce Certified Marketing Cloud Developer ✅ Salesforce Certified Platform Developer II ✅ Salesforce Certified OmniStudio Developer ✅ Salesforce Certified Marketing Cloud Consultant ✅ Salesforce Certified Marketing Cloud Account Engagement Specialist ✅ Salesforce Certified Marketing Cloud Administrator ✅ Salesforce Certified Nonprofit Cloud Consultant ✅ Salesforce Certified Field Service Consultant ✅ Salesforce Certified CRM Analytics and Einstein Discovery Consultant ✅ Salesforce Certified CPQ Specialist ✅ Salesforce Certified Service Cloud Consultant ✅ Salesforce Certified Marketing Cloud Email Specialist ✅ Salesforce Certified Sales Cloud Consultant ✅ Salesforce Certified Platform App Builder ✅ Salesforce Certified Experience Cloud Consultant ✅ Salesforce Certified Administrator ✅ Salesforce Certified Platform Developer I 𝐒𝐚𝐥𝐞𝐬𝐟𝐨𝐫𝐜𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐢𝐧𝐠: ✅ Configuring Salesforce orgs from scratch, including custom objects, fields, roles, and profiles ✅ Building flows, automating processes, and managing data with Data Loader ✅ Data cleansing and governance for accuracy and reliability ✅ Designing reports and dashboards for actionable insights ✅ Apex classes, triggers, Visualforce pages, Lightning Web Components (LWC), Aura ✅ Custom AppExchange product development and third-party integrations (REST/SOAP APIs, JSON, XML, web services) ✅ JavaScript/jQuery customization to extend Salesforce functionality ✅ AppExchange tool selection, administrator and end-user training, and go-live documentation 𝐇𝐮𝐛𝐒𝐩𝐨𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐢𝐧𝐠: ✅ HubSpot CRM setup ✅ HubSpot onboarding ✅ HubSpot customization ✅ HubSpot workflow automation ✅ HubSpot email marketing automation ✅ HubSpot lead management ✅ HubSpot pipeline setup ✅ HubSpot sales automation ✅ HubSpot reporting & dashboards ✅ HubSpot data migration ✅ HubSpot integration services ✅ HubSpot API integration ✅ HubSpot CMS development ✅ HubSpot landing page design ✅ HubSpot email template design ✅ HubSpot contact segmentation ✅ HubSpot data cleanup & deduplication ✅ HubSpot CRM optimization ✅ HubSpot lifecycle stage setup ✅ HubSpot support & maintenance 𝐏𝐫𝐨𝐟𝐢𝐥𝐞 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Salesforce Developer, Salesforce Administrator, Salesforce Consultant, Salesforce Marketing Cloud, Salesforce CPQ, Salesforce Development, Salesforce Sales Cloud, Salesforce Service Cloud, Salesforce Commerce Cloud, Salesforce Einstein, Salesforce Admin, CRM Development, Email Studio, Salesforce Apex, Salesforce Architect, Salesforce lightning, Lightning Web Components, LWC, Salesforce Expert, Salesforce Lightning Web Components (LWC), Salesforce integration, Senior Salesforce Developer, Salesforce AppExchange, Salesforce App Development, Salesforce API, Salesforce, Marketing Cloud, Marketing Campaign, Pardot, Salesforce Developer, Salesforce Development, Salesforce Admin, Salesforce Integration, Salesforce setup, Salesforce set up, Salesforce Customization, Salesforce dev, Account, Lead, Contact, Opportunity, Quote, Order, CPQ, PDF, SF dev, sfdc dev, Salesforce optimization, AppExchange, Managed Package, Unmanaged Package, app, application, publishing, publish, LWC, Lightning, Classic, Aura, Lightning Web Component, Lightning Framework, Visual force, Visualforce, VF, Lightning page, Apex, Trigger, Batch, Apex Class, Scheduler, Scheduled Apex, Batch, Queue, Queueable, Standard Objects, Custom Objects, Custom Fields, Validation, Validation Rules, Automation, Data, Setup, Einstein, Einstein GPT, EinsteinGPT, LinkedIn, Linked In, Apollo, Workflow, work flow, WF, Screen Flow, screenflow, Flow, Trigger Flow, triggerflow, Process Builder, process builder, email, email template, MailChimp, Mail Chimp, Einstein GPT, GPT4, Conga Composer & Conga Sign, Salesforce Maps, High Velocity Sales.

🏆 8+ Years Experience | Top Rated Plus | Full-Time Availability | Excellent Communication Greetings! I am a Computer Science Graduate and Full-Stack Developer with extensive experience in enterprise projects. I possess all the tools needed to bring your ideas to life. I prioritize close collaboration and communication with my clients, as this is your dream, and I'm here to build it. I am adept at working with other developers, whether as part of a team or independently, and can efficiently manage projects from start-up to completion. Frontend Skill Set: ✅ React.js / Next.js ✅ Vue.js / Nuxt.js ✅ TypeScript ✅ jQuery ✅ JavaScript ✅ Ant Design / Material-UI / Bulma / Bootstrap Mobile Development: ✅ React Native / Android / iOS Backend Skill Set: ✅ Node.js / Nest.js / Express.js ✅ Ruby on Rails ✅ Laravel ✅ Python (Django / Flask) AI Expertise: ✅ Generative AI, LLM, NLP ✅ Image Processing, Airflow, MLOPS ✅ Pandas, Scipy, Numpy, Matplotlib, Spacy, sklearn, scikit-image Specialized Technologies ($40/hr): ✅ OpenAI | ChatGPT ✅ Chatwoot | ChatBot Other Skills: Database Design and Architecture: MySQL, PSQL, SQLite3, MongoDB, Redis Git: Pull/Push, Branch Management, Merge, Rebase, Pull Request Agile Methodology API Concepts: GraphQL, REST API, SOAP APIs API Integration (Payment Gateways, Email Servers, SMS & IVR integration) API Development Hosting & App Deployment on Heroku, Amazon S3, Digital Ocean, and Private Servers UI/UX Suggestions Automation Test Cases Team Player & Team Management My response time is less than 30 minutes. I look forward to your messages. Thanks & Best Regards, Parmeet Singh Keywords: Full-Stack Developer | React Developer | Vue.js Developer | Mobile Developer | AI Specialist | OpenAI Expert | Chatbot Developer | API Integration | Database Architecture | Agile Methodology | Hosting & Deployment | Team Management | UI/UX Consultant | Automation Testing

Security Engineer | Penetration Testing | Bot Mitigation | Incident Response | Application Security I work as a Senior Security Engineer where I deal with large scale security challenges daily, from bot networks and web abuse to vulnerability assessments and incident response on platforms serving millions of users. My background covers the full security lifecycle: Offensive security Vulnerability assessment and penetration testing across web applications, identifying weaknesses before attackers do. Experience with VAPT engagements covering OWASP Top 10, authentication flaws, injection vulnerabilities, and business logic issues. Defensive security Bot mitigation, web abuse detection, WAF configuration, rate limiting, and traffic analysis. I have dealt with everything from credential stuffing and account takeover attempts to large scale scraping operations and store cloning attacks. Risk and compliance Threat modeling, architecture risk assessments, and security reviews helping businesses understand their attack surface and prioritise what to fix first. Incident response Investigating active breaches, tracing attack vectors, containing damage, and hardening systems post incident so it does not happen again. Some specific problems I help businesses solve: Unauthorised account access and breach investigations, bot traffic and automated scraping, fraudulent analytics inflation, store cloning and product theft, credential stuffing, checkout abuse, WAF setup and tuning, and ongoing security monitoring. My approach is practical not theoretical. I start by understanding exactly what is happening before recommending anything. Whether that is analysing traffic patterns, reviewing access logs, or running a proper vulnerability assessment the goal is always targeted solutions that fix the real problem. New to Upwork, not new to security.

I’m a top Sharetribe developer with extensive expertise in building and customizing marketplaces that drive results. Over the years, I’ve helped clients launch feature-rich platforms tailored to their unique business needs. I handle everything from designing the look of your marketplace to adding advanced features and making sure it runs smoothly. My focus is on creating a platform that meets your goals and gives your users a great experience. I am also experienced in technologies like Ruby on Rails, Node.js, Express, Postgres, MySQL, JavaScript, jQuery, Sharetribe, and React. I bring a wealth of experience to the table, and I'm eager to tackle any project or challenge that comes my way. Whether it's crafting seamless user interfaces, optimizing database performance, or building dynamic web applications, I'm ready to dive in and make it happen. Let's transform your ideas into digital reality! I also have extensive expertise with Bubble.io and am a highly qualified no-code/low-code developer. I have extensive expertise with Bubble.io and I am a highly qualified no code/low code developer I've worked on many kinds of projects such as eCommerce, CRM, ERP, RESTful API service, Payment platforms integration in Ruby on Rails. I'm Highly Proficient in use almost Rails' well-known gems: Devise, Cancan/Pundit, Paperclip, Sidekiq/Resque, RSpec/Minitest. My Full Technical abilities are: ✔︎ Ruby, Ruby on Rails, Node, Express, ✔︎ Open source - Spree, Solidus, Catarse, Discourse ✔︎ Sharetribe, Custom Sharetribe, Sharetribe Flex, Sharetribe Go ✔︎ React/Redux/Mobx, React Native, Vue.js. ✔︎ Javascript | CSS (with Sass, Stylus and Postcss ) | HTML (erb, Haml, Jade, Slim, JSX) ✔︎ MongoDB, PostgreSQL, MySQL ✔︎ Third-party API: Google Map API, AWS, Digitalocean API, GitHub API, Facebook, Twitter, Vk.com and so forth. ✔︎ Web-servers arrangement: Linux, Nginx, PostgreSQL, Passenger, Rails, Node.js I follow Agile methodology and I am highly familiar with scrum principles. I am familiar with version control tools like Bitbucket, Github and Gitlab. I also have good experience working with project management tools like Asana, Jira, Trello, Basecamp, Lark and Some others and widely open to adopt any new tool for betterment and transparency. I am accessible to offer Technical meeting/Test. Kindly let me know whether you're intrigued, I couldn't imagine anything better than to set up a brisk introduction visit/call at your helpful time. I am looking for long term working relationship.