I have around 8+ years of hands-on experience and knowledge of application development and configuration in Ruby on Rails and Salesforce lightning: apex, Visual Force, LWC, trigger automation, batch, user, Salesforce admin, Rest and Soap API, Tooling API/Metadata, SOQL, SOSL, SQL, Javascript, CSS, Salesforce Mobile, Standard Reporting, salesforce integration, etc.

Hello, I'm Ratnakar, a committed and independent full-time Ruby on Rails Developer on Upwork (Top Rated Plus). I am currently seeking long-term collaborations with clients. My experience includes working full-time with multiple global companies through Upwork from 2014. As a dedicated and Senior Ruby on Rails developer, my expertise encompasses a broad range of web development areas. This includes proficiency in front-end JavaScript and back-end Ruby, along with the development of comprehensive web platforms and APIs for mobile applications & front end applications, all utilizing the latest technologies. With more than 8 years in software development, I have successfully delivered a wide range of projects across various industries, consistently achieving client satisfaction and project objectives. Here are some key strengths that characterize my work: ✦ Ruby on Rails: MVC architecture, RESTful APIs, ActiveRecord, testing frameworks (RSpec) ✦ Database: PostgreSQL, MySQL, MongoDB ✦ Javascript, Jquery, React ✦ Hotwire Turbo, Stimulus ✦ Deployment: Heroku, AWS, Digital Ocean ✦ Docker, Portainer ✦ Sidekiq, Redis ✦ Shopify apps & extension development, Liquid Templates ✦ Third-party and RestFul API integration ✦ HTML, CSS ✦ Github, Bitbucket ✦ Jira, Trello, Pivotal, Clickup ✦ Sharetribe Marketplace Please feel free to reach out to me, and I would be delighted to discuss your requirements in detail.

I'm a Full Stack Developer with 7+ years of experience building and scaling web applications — from early-stage MVPs to production platforms serving real businesses across multiple industries. I've worked across healthcare, marketing, CRM, education, e-commerce, and AI automation. Whether you need a new product built from scratch, a feature added to an existing app, a performance issue diagnosed, a bug fixed, or just an experienced developer to consult with — I can help. ━━━ WHAT I DO ━━━ SaaS Product Development I've built multi-tenant SaaS platforms from scratch as a solo developer — handling architecture, database design, background job systems, third-party integrations, subscription billing with Stripe, and deployment. I understand what it takes to build a product that scales. AI-Powered Features & Automation I integrate AI into real products — conversational agents, automated workflows, content generation, and smart automation pipelines. I've connected platforms to OpenAI, built AI-driven front desk and appointment systems, and used tools like Zapier to automate cross-platform business processes. API Integrations & Third-Party Services From payment gateways to SMS providers, email platforms, CRMs, Google APIs, and booking systems — I've integrated dozens of third-party services into production apps and know how to make them work reliably. Performance Optimization I've diagnosed and fixed slow Rails applications — eliminating N+1 queries, adding missing indexes, restructuring ActiveRecord patterns, tuning background jobs, and improving database performance. I use profiling tools and real metrics to find what actually matters. Full Stack Frontend React, Hotwire/Turbo, and JavaScript for fast, clean frontends. I pick the right tool for the project, not the trending one. ━━━ INDUSTRIES I'VE WORKED IN ━━━ Healthcare · Marketing & Campaigns · CRM & Sales Tools · Education · E-commerce · AI Automation · Event Management ━━━ TECH STACK ━━━ Ruby on Rails · React · Node.js · PostgreSQL · Sidekiq · Redis · Hotwire/Turbo · OpenAI API · Stripe · Vonage · SendGrid · Zapier · Google APIs · Retell · Heroku · Docker · RSpec · Python · Vapi · n8n ━━━ WHAT YOU CAN HIRE ME FOR ━━━ ✔ Build a new SaaS product or web application from scratch ✔ Add features to your existing Rails, Python or MERN stack app ✔ Fix bugs and resolve production issues quickly ✔ Optimize your app's performance and database queries ✔ Integrate third-party APIs and automation tools ✔ AI feature development and LLM integrations ✔ Code review, architecture consultation, or technical mentoring ✔ Ruby on Rails tutoring and pair programming ━━━ HOW I WORK ━━━ I'm async-friendly, communicative, and available 30–40 hours/week. I overlap with both EU times and US times. I treat your project like my own — flagging issues early, writing clean code, and staying accountable to outcomes. Let's talk about what you're building.

🤵 12+ years of experience in full stack development 📩 Most Invited for Custom Software/Full Stack (Ruby on Rails, React, Node.js, Nest.js)/DevOps Solutions & Automation Solutions 🥇 24000+ Upwork Hours Hello, my name is Zaid and over the last 12+ years working on Ruby on Rails (RoR) and 6+ with Javascript, MERN (MongoDB, Express, React, Node.js) and Nest.js and also have experience in Artificial intelligence development, 1- One of the key project: (𝐃𝐌𝐀𝐑𝐂 𝐑𝐞𝐩𝐨𝐫𝐭). I worked on this platform for 9 years. It provides tools for monitoring and enforcing email authentication protocols, specifically DMARC (Domain-based Message Authentication, Reporting, and Conformance). I handled all their core infrastructure-level work. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐭𝐚𝐜𝐤 (Ruby on Rails, Redis, PostgreSQL, AngularJS, Docker) 2- I have worked with 𝐒𝐮𝐜𝐜𝐞𝐬𝐬.𝐚𝐢 for the past 3 years, contributing to the platform's growth.. During this time, I helped implement and optimize advanced algorithms that provide real-time data analysis, turning raw data into actionable insights for users. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐭𝐚𝐜𝐤 (React, Node.js, Next.js, AWS, Docker, Nest.js) 3- I worked with 𝐓𝐫𝐚𝐝𝐞𝐝.𝐜𝐨 for 4 years. I worked on integrating third-party APIs to extend the platform's capabilities, enabling seamless transactions and real-time data exchange. I solved core technical problems such as improving the booking engine's performance, creating dynamic search filters, and streamlining real-time updates to ensure a smooth user experience. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐭𝐚𝐜𝐤 (Ruby on Rails, PostgreSQL, Redis, AWS, Vue.js, Paypal, Heroku, Stripe) 𝗡𝗼𝘁𝗲: If you have any project that requires immediate attention, whether upgrading the platform from old versions or building a platform from scratch. If you are facing some issues in your project, then I am here to solve your problems on an immediate basis. If you need some work on DevOps related work or Cyber Security solution, then I am here to get things done for you. I'm also a Cloud DevOps Engineer with more than 6 years of experience, specialized in cloud platforms such as AWS, Azure, DevOps, GCP and DigitalOcean - especially using tools like Docker, Kubernetes, Terraform, always focused on creating a very secure and highly available environment with great performance, monitoring, and cost optimization. I also have a huge expertise in CI/CD solutions such as Jenkins, Bitbucket Pipelines, GitHub Actions, GitLab, among others. Here is my Github username: zaidakram Full stack development Skills & Expertise: - Backend: Ruby, Rails, Python, Node.js, Nest.js, Express.js - Frontend JS: React.js, jQuery, Vue.js, Angular.js - Front-end UI development: HTML5, HAML, Twitter, Bootstrap, Tailwind CSS - Databases: PostgreSQL, MySQL, Sqlite, NoSQL, MongoDB, DynamoDB, SQL - TDD: RSpec, Mini_test, TestUnit - Testing frameworks: Selenium - Code Management: Github, Bitbucket - Server: AWS, Heroku, DigitalOcean, DevOps solution - Project Management Tools: Asana, Jira, Trello and few more as well My DevOps Skills: ~ DevOps ~ DevSecOps ~ Amazon Web Services (AWS): EC2, ECS, S3, IAM, Lambda, Route 53, CloudFront, CloudFormation, etc. ~ Microsoft Azure ~ Google Cloud Platform (GCP) ~ DigitalOcean ~ CI/CD ~ Docker ~ Kubernetes ~ Jenkins ~ Terraform ~ Ansible ~ Serverless ~ Deployment Automation ~ Automated Tests ~ Apache, Tomcat and Nginx ~ Git/SVN ~ Linux (Ubuntu/RedHat/CentOS) ~ SQL/ NoSQL ~ Network Protocols Whether you're looking for long-term collaborations or need expert advice for a short-term project, I'm here to help. Let's take your business to the next level—message me on Upwork or schedule a consultation to discuss your specific needs. keywords: #devops, #devsecops, #AWS, #azure devops, #Amazon Web services,# EC2, #ECS, #Fullstack, #backend, #frontend, #React, #React.js, #Node, #Nest.js, #Ruby, #Rails, #Ruby on Rails, #Rspec, #Tailwind CSS, #Bootstrap, #Vue, #Vue.js, #Docker, #CI/CD, #Ansible, #Azure, #Kubernetes, #Jenkins, #Terraform, #Ansible, #Serverless, #Git, #Automation, #Deployment, #Python, #Node.js, #Express.js, #SQL, #PostgreSQL, #Selenium, #Jira, #Github, #Linux, #GCP, #Google Cloud Platform, #DigitalOcean, #ROR, #ruby gems, #ios, #android, #Artificial intelligence, #AI, #Machine Learning, #firebase, #SaaS, #SaaS development, #API, #Restful API, #Healthtech, #Health #Natural Language Processing #typescript, #ECS, #Terraform, #serverless

Hello! I have 20 years experience with web development. 17 of those years have been with a Ruby on Rails focus and accompanying DevOps. I also have extensive experience with client-side Javascript. I believe maintaining a high-level of communication during a project is paramount to the success of a project, in addition to it finishing on-time and on-budget. Software development is my business, I'm not moonlighting with a full-time job during the day. As such, I will not disappear one day to never be heard from again. Which unfortunately is a common situation with freelance developers. Additionally, I believe in high-quality software development practices like automated testing, test-driven development, continuous integration/delivery, daily stand-ups, etc All of this is with the end goal of helping businesses increase their return on investment with their software development projects. I have expert experience with the following technologies : - Ruby, Ruby on Rails - Javascript/Ecmascript 5+, Hotwire/Turbo/Turbolinks - HTML5, CSS3 - Nginx - Ubuntu, DevOps - Postgres, MySQL - Rackspace, AWS, Digital Ocean, Heroku - Background processing, Queuing (Resque/Sidekick) - REST, Web Services, SOAP - High-performance APIs (JSON/XML) - Payment Processing - Stripe, Braintree, Paypal, Chargify I also have general experience with: - Apache - Linux variants other than Ubuntu - ElasticSearch, Solr, Sphinx - MongoDB Thanks for reading if you made it this far. Let's make something great together!

Senior Ruby on Rails developer (RoR) and full stack developer with 10+ years in web development, building, scaling, and maintaining production web applications. I work inside existing Rails codebases, ship new features, fix bugs, optimize performance, and harden billing and webhook logic - without breaking what already works. Part of the Roobykon Software team, where we have launched 150+ marketplaces and SaaS platforms in past 14+ years. I have helped scale products from MVP to high-traffic systems serving hundreds of thousands of users, cut page load and query times, and kept apps stable under growth. 🔹 Selected results and deliverables: ⬩ 10+ years and thousands hours of hands-on Ruby on Rails and full stack development ⬩ Contributed to 40+ production Rails and React applications, from MVP to scale ⬩ Scaled products to thousands of active users while keeping uptime stable ⬩ Cut page load and API response times by up to 60% through query and ActiveRecord optimization ⬩ Reduced background job processing time and backlog with Sidekiq and Redis tuning ⬩ Delivered MVPs in 8 to 12 weeks and shipped weekly feature releases on live apps ⬩ Integrated Stripe billing and webhooks processing hundreds of transactions per month ⬩ Maintained and upgraded legacy Rails apps to Rails 7 and Rails 8 with zero-downtime deploys 🔹 What you get working with me: ⬩ A web developer who reads the code carefully before changing it, communicates clearly, and works independently ⬩ Clean, well-structured, tested code with proper pull requests and CI ⬩ Async-first collaboration with daily overlap for US Eastern time zones (based in Europe) ⬩ Fast turnaround on feature development, bug fixes, and performance optimization 🔹 Core Ruby on Rails work: ⬩ Ruby on Rails development from MVP to scale, including Rails 7 and Rails 8 ⬩ Maintaining and improving existing Rails applications and legacy upgrades ⬩ Multi-tenant SaaS architecture, organizations, users, roles, subscriptions, usage records ⬩ ActiveRecord query optimization and database performance tuning ⬩ Background jobs and async processing with Sidekiq, ActiveJob, and Redis ⬩ Stripe, billing, subscriptions, and webhook integrations ⬩ REST and GraphQL API development and third-party API integrations ⬩ RSpec and Minitest, Hotwire (Turbo, Stimulus), Docker, CI debugging, tenant isolation and security 🔹 Full stack and frontend: ⬩ React developer work with React (ReactJS), React Native, Vue.js, Angular, Next.js, Redux, TypeScript ⬩ JavaScript (ES6+), HTML5, CSS3, Tailwind CSS, Bootstrap 5, jQuery, responsive web design ⬩ Node.js, Express.js, Python developer skills for services and integrations, plus PHP and Laravel maintenance when projects require it 🔹 AI and LLM features: LLM integrations with Anthropic Claude and OpenAI - streaming chat, tool-call-driven UI, RAG, vector search, prompt engineering. I also collaborate with data scientist and ML teams to ship AI-powered features 🔹 Databases, cloud and DevOps: ⬩ PostgreSQL, Redis, MySQL, MongoDB, Amazon Redshift, Elasticsearch, SQL ⬩ AWS (EC2, S3, Lambda, IAM, CloudWatch), Heroku, DigitalOcean, Git, CI/CD pipelines 🔹 Industries and platforms: ⬩ B2B and B2C SaaS, multi-vendor and rental marketplaces, Sharetribe and custom-built platforms ⬩ E-commerce, Shopify and Shopify app development, payment gateways and escrow systems, CRM, logistics, ERP and Odoo portal integrations, booking and scheduling, telemedicine, real estate, and blockchain-adjacent products On larger engagements I work as the technical lead alongside the project manager and in-house teams, and I have supported recruiter and hiring screens for Rails and full stack roles. I bring the same care whether I am a solo full stack developer or one engineer on a bigger crew. I work as a Ruby on Rails developer, Rails + React developer, senior Ruby on Rails engineer, Ruby on Rails architect, full stack SaaS developer, web application developer, and PHP or Java-stack-adjacent integrator - bridging backend, frontend, and infrastructure to deliver complete, reliable solutions. Whether you need to add features to a live Rails app, build a new SaaS product, fix production issues, optimize a slow system, or integrate Stripe, APIs, or AI features, I deliver high-quality solutions and transparent collaboration. 💬 Let's discuss your project and turn it into a stable, scalable product.

Hi there👋 I would be glad to help you if you are looking for Ruby / Ruby on Rails developer for your project🚀 To give an idea of my skill set, I'm good at the following technologies: - Ruby, Ruby on Rails - HTML, CSS, Bootstrap, Tailwind CSS - JavaScript - jQuery - SQL (Postgresql, SQLite) - MySQL - AWS - Heroku - haml - slim - rails118n - state-machines - Elasticsearch - algoliasearch-rails - rails API development - serialisation - Rspec - minitest Workflow: - GIT, SVN(bitbucket/github/gitlab) - Jira, Trello, Asana - Slack, Teams, etc. Also, I have a background of learning Java, Python, C++, C# and passed a course from Cisco Networking Academy. You can see the certificate attached on my profile below⤵️ I'm up to long-term and full-time collaboration, so in case you need a skilled developer, feel free to reach out!

I am an experienced Ruby on Rails developer with over 7 years of expertise in the field. I am passionate about taking on new and challenging projects where I can apply my skills and gain valuable experience. I value honest and transparent communication. I always like to understand your needs and give advice to produce the best results possible. My Skills & Expertise: - Ruby on Rails - Ruby on Jets - Shopify App development(Public and Custom) - Shopify store migration - Shopify Scripts for the Shopify Plus store - Databases experience with PostgreSQL, MySQL, MongoDB - Third-party API integrations - TDD experience with RSpec - Experience in Github, Heroku, Bitbucket, Amazon AWS, Amazon S3, Digital Ocean

I am a Senior Full-Stack Ruby on Rails Developer with over 12 years (Have also worked on Backend Ruby) of professional experience in designing, developing, and scaling high-performance web applications.
I have led multiple teams, served as a CTO for a funded startup, and delivered end-to-end Ruby on Rails solutions for global clients in Fintech, Real Estate, Healthcare, EdTech, Logistics, and E-Commerce. Core Ruby on Rails Expertise • Ruby on Rails (v3–v8), Ruby • API development and optimization (REST & GraphQL) • Hotwire, Turbo, Stimulus JS and Hotwire Native • Backend Ruby • Scalable architecture and performance optimization • Server-side and database-level security implementation • Background Jobs, Sidekiq, Redis • RSpec, Capybara, FactoryGirl, Cucumber (TDD & BDD environments) • Action Cable (WebSockets, Live updates) • Docker, Containers, Compose, CI/CD • JWT Authentication and OAuth • Database design: PostgreSQL, MySQL, Redis, Elasticsearch Large Language Models & AI Integration (Advanced) • OpenAI Fine-Tuning, Embeddings, APIs • LangChain and LlamaIndex • Vector Databases: Pinecone, PGVector • Use cases: Search, Clustering, Recommendations, Classification, Anomaly Detection Cloud & DevOps (AWS and Scalable Infrastructure) • AWS EC2, ELB, Elastic Beanstalk, Lambda, API Gateway • S3, CloudFront, Route 53, VPC, Subnets • ElastiCache, SQS, SNS, MQ • DevOps CI/CD pipelines, monitoring, scaling 3rd Party Integrations & APIs • Payment Gateways: Stripe Connect, PayPal, Square, Paytm, Razorpay, PayU, PayFort, Hyperpay, PayTabs, Orange-Vodafone (Congo) • Insurance APIs: Medgulf, UBI, Taunia • Government APIs: ELM, Yakeen, WASL, CITC • Identity Verification APIs: ELM & Yakeen • Google APIs (Maps, Firebase) • SMS Gateways: Twilio, Firebase, Unifonic Tools & Management • Code Documentation: Confluence • Project Management: Trello, Asana, Pivotal Tracker, GitHub • Source Control: Git, Bitbucket Industries Served • Fintech and Banking • Real Estate and Property Tech • Healthcare and Fitness • EdTech • Logistics and Law Tech • E-Commerce and Retail • Gaming and Entertainment • Salon and Spa Management Why Choose Me • 12+ years of hands-on experience in Ruby on Rails full-stack development • Strong architectural and DevOps background for scalable and secure systems • Proven record of building and leading high-performance engineering teams • Deep understanding of AI/ML and its integration into modern Rails systems Let’s connect for a 10-minute strategy call to discuss your project, goals, and how I can bring value to your application with clean, scalable, and future-ready Ruby on Rails code. Additional Capabilities (Through My Team) At Tecorb Technologies, we have a team of 100+ developers and designers with deep expertise in: • Frontend: JavaScript, TypeScript, React.js, Angular, Tailwind CSS • Backend: Ruby on Rails, Node.js, Python • Mobile: Swift, Kotlin, Java, Flutter • Databases: PostgreSQL, MySQL, MongoDB, Redis • DevOps, AI, and Machine Learning You can check my open-source contributions on GitHub: TecOrb Technologies

𝗔𝗿𝗲 𝘆𝗼𝘂 𝗹𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝗮 𝗳𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗵𝗼 𝘀𝗵𝗶𝗽𝘀 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝗳𝗮𝘀𝘁, 𝘄𝗿𝗶𝘁𝗲𝘀 𝗰𝗹𝗲𝗮𝗻 𝗰𝗼𝗱𝗲, 𝗮𝗻𝗱 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗰𝗮𝗿𝗲𝘀 𝗮𝗯𝗼𝘂𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁'𝘀 𝘀𝘂𝗰𝗰𝗲𝘀𝘀? That's what I've done for 22+ clients across B2B SaaS, e-commerce, marketplaces, and AI-powered platforms building full-stack applications from greenfield MVP to production-grade systems handling real users and real revenue. ✔ $30K+ earned on Upwork — 100% Job Success Score across all contracts ✔ Top Rated Plus — awarded to the top 3% of freelancers on Upwork ✔ AI integrations delivered — OpenAI API, LLM pipelines, and AI features inside production apps ✔ 30+ products shipped — MVPs, multi-tenant platforms, API-first systems ✔ Engineering team lead experience — ChannelDispatch, UnitedWay, and more ✔ 1,940+ hours billed — long-term clients hire me back because I deliver value, not just hours ━━━ 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 𝗙𝗢𝗥 𝗬𝗢𝗨 ━━━ → AI-powered features — OpenAI API integration, custom LLM workflows, and AI assistants embedded in your existing product. The right model with the right architecture. → Full-stack web applications — Rails backend, React frontend, Stripe billing, multi-tenancy, role-based auth, REST & GraphQL APIs. Production-ready from day one. → Performance & scalability — database optimization, background jobs (Sidekiq), Redis caching, query profiling. I fix the slow, the broken, and the brittle. → MVP to market — fast — clear scope, weekly milestones, daily async updates. You'll always know where we are and what's next. No surprises. ━━━ 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞 ━━━ Ruby on Rails · React.js · PostgreSQL · Node.js · OpenAI API · Sidekiq · Redis · Docker · TailwindCSS · GraphQL · Stripe · AWS / Heroku ━━━ 𝗟𝗘𝗧'𝗦 𝗕𝗨𝗜𝗟𝗗 ━━━ Send me a message — I respond within an hour, and we'll scope your project for free. If you're serious about shipping, I'm the developer for you.