I work on Ruby on Rails and Shopify-based systems, mainly focused on backend development, custom apps, and integrations. Most of the projects I handle involve connecting different systems, Shopify stores, APIs, third-party tools, and internal workflows. Recently, I’ve also been working on automation using n8n to reduce manual work and streamline processes. Here’s what I usually help with: - Ruby on Rails backend development and API creation - Shopify app development (custom features, private/public apps) - Shopify store improvements and custom functionality - Third-party integrations (payments, CRM, external APIs) - Workflow automation (webhooks, scheduled jobs, system sync) - Fixing or improving existing applications I try to keep things simple and reliable - clean backend logic, stable integrations, and solutions that are easy to maintain. If you already have a system and need improvements, integrations, or automation, I can review it and suggest a clear approach.

I am a Senior Backend Software Engineer with over 12 years of experience in Ruby On Rails developing high-scale, distributed systems across fintech, healthcare, and travel sectors. My expertise lies in Ruby and event-driven architectures and I have successfully designed and delivered critical data infrastructures that handle tens of millions of events monthly. As an AI-augmented engineer, I leverage advanced AI models to increase developer velocity, optimize workflows and elevate productivity within teams. I also have a strong track record of stepping into messy, vibe-coded, or poorly documented codebases and bringing them under control by refactoring tangled logic, establishing structure, improving test coverage, and making them maintainable long-term. If you have a codebase that has become hard to reason about, hard to change, buggy, or simply a prototype that needs help to get to the next level then I can help you clean it up and set it on solid foundations. Let's connect and discuss how I can help achieve your project goals!

I’m a Senior Full-Stack Engineer with 9+ years of experience building and scaling enterprise-grade web applications, SaaS platforms, and backend systems using Ruby on Rails, Python, Node.js, and React. I work with companies looking for a long-term engineering partner who can take ownership of systems, improve architecture, and deliver reliable, scalable solutions. Alongside strong full-stack expertise, I help teams integrate AI and LLM-driven features to automate workflows and improve product efficiency. Core Expertise: Enterprise SaaS architecture & scalable backend systems Ruby on Rails & Node.js application development API design & third-party integrations (Stripe, Google APIs, DocuSign, etc.) Performance optimization, clean architecture, and maintainable code AI & LLM integrations (OpenAI/GPT, automation workflows, intelligent features) Technology Stack: Backend: Python, Ruby on Rails, Node.js, PostgreSQL, MySQL, Redis Frontend: React.js, React Native, JavaScript, Tailwind CSS Infrastructure: AWS, GCP, Heroku, DigitalOcean AI: LLM integrations, workflow automation, prompt engineering How I work: Strong ownership and long-term thinking Clear communication with stakeholders and teams Focus on stability, scalability, and business outcomes Clean, well-documented code designed for future growth If you’re looking for a senior engineer who can contribute beyond coding, architecture, system thinking, and long-term product success. let’s connect.

Full Stack developer with 7+ years experience. I am a professional full-stack web developer with extensive experience in software development and Linux system administration. I can build entire apps with complex business logic from scratch or optimize an existing one. I have strong OOP skills, deep knowledge of Python and Django framework programming as well as huge experience in database integration and high-load optimizations. Here's a brief overview of my skills and experience: Architecture: Clean Architecture, Domain Driven Design, REST APIs, patterns Databases and ORMs: Django ORM , GraphQL, Postgres, MySQL Back end: Python – Django, Flask, FastAPI, Laravel (different versions up to the latest One), R language, Scikit-Learn for Machine Learning, and PHP. Front end: Angular, VueJS, ReactJS, JavaScript/Typescript, CSS, Bootstrap, D3JS, and Flex layouts. Cloud technologies: AWS, GCP (App service, Functions, Database services, Storage, and much more) GIS Stacks: Leaflet, Bing, Geonames, over street Google, Open layer, and Map Box Security: OAuth2 with Third Party Integration B2B /B2C Payment Gateways: Stripe, PayPal, and Checkout DevOps Tools: DevOps for Github, Gitlab, Celery, and CI/CD pipelines Quality Assurance Tools: Github Integration, CircleCi, Coverall, code climate with Github Project Management Tools: JIRA, ASANA, TRELLO, GitHub Issues & Flows, Click Up, Slack and Basecamp and VCS I find myself a responsible, self-motivated, solution-driven developer and always meet clients' expectations in terms of code quality and turnaround

Experienced software engineer skilled in full-stack development and system architecture. Proficient in various programming languages, including Ruby, Java, and Python. Expertise in designing and implementing robust, scalable applications, with a focus on clean code and efficient algorithms. Proven track record of delivering high-quality projects on time and within budget. Strong communication skills and a collaborative team player. Ready to contribute technical excellence to Upwork clients. - Frame work: Rails, JavaScript, TypeScript - Frontend: React.js, Angular.js, SvelteJs, VueJs, Next JS - Backend: Ruby, Python, Node.js, LangChain, N8N, Ai Automations, OpenAi AgentKit - Database: MySQL, PostgreSQL, NoSQL(Firebase) - APIs: Rest / GraphQL Framework, SWAGGER API - Cloud: AWS (EC2, ,S3, Lambda) - Version control: GitHub - Testing: Selenium, RSpec - Automations: N8N, Make.com, MCP - Others: Dockers, Pandas, Numpy, Capistrano, Ffmpeg, ElasticSearch, Sidekiq/Redis

I'm a senior full-stack developer with 10+ years of experience helping startups and companies launch and scale applications using Ruby on Rails. I specialize in: 🔧 Fixing broken Rails apps and improving performance 🧠 Building MVPs from scratch in <30 days with user auth, dashboards, admin panels, APIs 🌐 API integrations & deployments to Heroku, AWS, or custom servers 📱 Full-Stack cross-platform apps using Rails + Flutter I've built award-winning EdTech platforms, real-time collaboration tools, referral systems like Prelaunchr, and large-scale business directories. If you're looking for someone to take ownership of your app and move fast with clean code, let's talk.

🌟 Crafting top-tier websites for 10+ years 🗣️ Providing seamless English communication 📅 5000+ hours billed, delivering enterprise-grade solutions 🤝 Trusted by Fortune 500 companies for complex projects As a Senior Fullstack Engineer with over 10+ years of experience, I specialize in building robust, scalable web applications. My expertise covers both front-end and back-end development, ensuring seamless user experiences and efficient, maintainable code. **Key Skills:** - Frontend: React, Vue.js, HTML5, CSS3, JavaScript, TypeScript - Backend: Python, Ruby on Rails, Node.js - Databases: PostgreSQL, MySQL, MongoDB - Cloud Services: AWS, Heroku, DigitalOcean - DevOps: Docker, Kubernetes, CI/CD, Jenkins - Version Control: Git, GitHub, Bitbucket **What I Offer:** - End-to-end web application development using Ruby on Rails and modern frontend frameworks - Custom API development and third-party API integration - Cloud deployment and infrastructure management - Performance optimization and scalability solutions - Automated testing and continuous integration/continuous deployment (CI/CD) setup **Notable Projects:** - Developed a comprehensive project management tool using Ruby on Rails and React, facilitating team collaboration for over 200 organizations. - Created a scalable e-learning platform with user authentication, course management, and payment processing. - Implemented a robust CI/CD pipeline for a fintech startup, reducing deployment times by 60%. I am dedicated to delivering high-quality code and exceptional client service. Let’s connect to discuss how I can contribute to your next project!

Hi! I’m Rana Arslan, a Top Rated Plus Full Stack Developer specializing in Ruby on Rails and MERN stack (MongoDB, Express.js, React.js, Node.js). I build scalable, high-performance web applications that help businesses grow efficiently. I have experience delivering production-ready applications, including SaaS platforms, dashboards, marketplaces, and internal business tools. My focus is on clean, maintainable code, responsive UIs, and seamless backend and API integration. Expertise Includes: • Backend: Ruby on Rails, Node.js, Express.js, PostgreSQL, MySQL, MongoDB • Frontend: React.js, Next.js, Redux, Material-UI, Tailwind CSS, Bootstrap • APIs: REST, GraphQL, third-party integrations (Shopify, Stripe, Twilio, QuickBooks, OAuth) • Deployment & Tools: AWS, Google Cloud, Heroku, Docker, Git, CI/CD Portfolio Highlights: • Westside Children’s Therapy App – Chicagoland’s Most Comprehensive Autism & Pediatric Therapy, All in One Place. • ClikDone – All-in-One Digital Services Built for Growth • Procare – A Leader in Child Care Management Software I partner with startups, SaaS companies, and enterprises to deliver robust, secure, and scalable web applications.

I help startups, SaaS companies, and growing businesses build scalable web applications, marketplaces, and custom software products using React, Next.js, Node.js, and Ruby on Rails. Over the past 6+ years, I've developed and maintained production systems across healthcare, logistics, property management, eCommerce, and subscription-based SaaS platforms, helping businesses launch new products, improve operational efficiency, and scale existing applications. Whether you're building an MVP, modernizing an existing platform, developing custom APIs, or scaling a growing product, I focus on delivering reliable, maintainable, and business-oriented solutions built for long-term growth. I specialize in building: • SaaS Platforms & Subscription-Based Applications • Marketplace & Multi-Vendor Systems • Healthcare & Booking Platforms • Logistics & Delivery Management Systems • Dashboard & Admin Panel Applications • Real-Time Applications & Notification Systems • Scalable Backend APIs & Third-Party Integrations • Startup MVPs & Product Development • Shopify Integrations & Custom eCommerce Solutions Additional Expertise: • SaaS Development • MVP Development • Custom Web Application Development • MERN Stack Development • API Development & Integrations • React Native Mobile Applications • System Architecture & Product Scaling • Performance Optimization • Cloud Infrastructure & Deployment Core Technical Expertise Frontend: • React.js • Next.js • TypeScript • Tailwind CSS • React Native Backend: • Node.js • Express.js • Ruby on Rails Databases: • PostgreSQL • MongoDB • Redis • Firebase Infrastructure & Tools: • REST APIs • GraphQL • Docker • CI/CD Pipelines • AWS • Git • Agile Development Over the years, I've contributed to and maintained complex production systems including: • Property rental and booking marketplaces • Healthcare dashboards and EHR integrations • Multi-vendor eCommerce platforms • Logistics and driver management systems • Social networking and mobile applications • Operational dashboards and workflow management platforms • Subscription-based SaaS products My development approach focuses on building scalable, maintainable, and business-oriented solutions that improve operational efficiency, support product growth, and remain stable as user demand increases. I prioritize clean architecture, backend reliability, API performance, database optimization, security, and long-term maintainability to ensure applications are built for scale from day one. Clients work with me for: • End-to-end product development ownership • Scalable and maintainable codebases • Strong technical problem-solving • Reliable communication and consistent execution • Product-focused engineering mindset • Long-term technical partnership and support Whether you need to build a new SaaS platform, launch an MVP, scale an existing application, develop custom APIs, integrate third-party services, optimize backend performance, or modernize an existing system, I can help deliver reliable and scalable solutions aligned with your business goals. Available for long-term projects, startup partnerships, ongoing development, and complex full-stack product engineering engagements.

Full-Stack Developer with 9+ years building scalable SaaS platforms, FinTech dashboards, and HealthTech apps using React.js, Next.js, Node.js, and Ruby on Rails. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱 𝗙𝗼𝗿 𝗬𝗼𝘂- React.js & Next.js web apps · Ruby on Rails backends · Node.js / Nest.js APIs · SaaS platform development · MVP development · FinTech dashboards · HealthTech applications · E-commerce solutions · REST & GraphQL API integrations 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 ▪ 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React.js, Next.js, TypeScript, Vue.js, Tailwind CSS ▪ 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js, Nest.js, Ruby on Rails ▪ 𝗔𝗣𝗜𝘀 & 𝗣𝗮𝘆𝗺𝗲𝗻𝘁𝘀: REST, GraphQL, Stripe, PayPal, Twilio, Plaid, Firebase ▪ 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗕: AWS, PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch 𝗣𝗿𝗼𝘃𝗲𝗻 𝗥𝗲𝘀𝘂𝗹𝘁𝘀 ▪ Scaled a HealthTech SaaS platform from 0 to 50K+ users with zero downtime ▪ Cut FinTech dashboard load time from 6s → 1.3s, improving user retention ▪ Delivered full-stack migrations for enterprise clients without service interruption ▪ Shipped 10+ production MVPs across EdTech, E-commerce, and Enterprise domains 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 Discovery call (free, 30 min) → Scope & cost estimate → Agile delivery with sprint-based tracking → Weekly video progress updates → Automated QA + manual testing → CI/CD deployment + ongoing support Ready to build something that scales? Let's talk send a message and I'll respond within a few hours. 𝗪𝗵𝗮𝘁 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 𝗙𝗼𝗿 Full-Stack Web Development, React.js Development, Next.js Development, Node.js Development, Ruby on Rails Development, SaaS Platform Development, MVP Development, Web Application Development, API Development & Integration, REST API Development, GraphQL API Development, FinTech Dashboard Development, HealthTech Application Development, E-commerce Development, Enterprise Web Applications, Frontend Development, Backend Development, TypeScript Development, Database Architecture, Cloud Deployment & DevOps