Hire the Best Sinatra Framework Developers

🏆 Upwork Top Rated PLUS (Top 1%) 🌟 5-Star Reviews | 100% Job Success 🎯 Fluent & Precise (English) communication 💼 10+ Years of Experience | 100+ Projects Delivered | 33,000+ Proven Work As a Top 1% talent on Upwork, I bring a wide-ranging skill set and a commitment to excellence. With 10+ years of full-stack development and 30,600+ hours of experience, I specialize in building scalable, high-performance web and mobile applications. My focus is on long-term collaborations that drive success, backed by a 100% job success score and a proven track record of reliability. 𝗞𝗲𝘆 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: ✓ Ruby / Ruby on Rails ✓ Python (Django / Flask / FastAPI) ✓ Node.js / Express.js / MERN | MEVN Stack ✓ ReactJS / NextJS / TypeScript / JavaScript ✓ React Native (iOS & Android) ✓ API Development (RESTful, GraphQL) ✓ PostgreSQL / MySQL / MongoDB ✓ Docker / Kubernetes / Heroku / AWS / GCP ✓ MQTT / SNS / SQS ✓CSS3 / Tailwind / Bootstrap / Materialize ✓ Expert in leveraging AI (vibe coding) tools: Cursor, Windsurf, Lovable, Bolt, Co-pilot 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀: ✓Amazon Web Services (AWS): EC2, S3, Lambda, ECS, ECR, Fargate, Elastic Beanstalk, Lambda functions, CloudWatch, CloudFormation, Elastic Load Balancer, DynamoDB, SNS, Step Functions ✓ Azure Cloud ✓ Google Cloud (GCP) ✓ Digital Ocean ✓ Docker & Kubernetes for containerization ✓ CI/CD tools: CircleCI, Jenkins, Github Actions, Heroku Pipelines 𝗔𝗴𝗶𝗹𝗲 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 & 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻: ✓ Extensive experience in Agile, Scrum, Kanban, and XP methodologies ✓ Project management expertise with Jira, Trello, Redmine, Basecamp ✓ Version control with GitHub, Bitbucket, SVN, CVS 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗲𝗱 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: ✓ Payment Systems: Stripe, PayPal, Authorize.net ✓ Social APIs: Facebook, Instagram, Twitter ✓ OAuth Integration: Google, LinkedIn, GitHub, StackOverflow 📢 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 & 𝗣𝗿𝗼𝗯𝗹𝗲𝗺-𝗦𝗼𝗹𝘃𝗶𝗻𝗴: I believe communication is the key to every problem. So i ensure smooth project execution through clear communication and collaborative problem-solving. Let’s connect and see how I can help your project succeed!!

I am a Marketplace Guru! ✅ #1 Sharetribe experts on Upwork. ✅ 100%+ Job Success Rate | Top Rated Plus | Trusted by 120+ clients worldwide. ✅ Top 2% of RoR talent on Upwork | Trusted expert for complex and high-impact projects. I’m a full-stack developer and engineering leader with 12+ years of experience building scalable products, leading high-performing teams, and helping businesses turn ambitious ideas into reliable, long-term solutions. My role goes far beyond writing code. I work closely with companies to transform concepts into scalable products while staying accountable for outcomes, not just deliverables. Over the years, I’ve partnered extensively with founders and businesses across Australia, the United States, Europe, and other global markets to architect, build, and scale products where performance, maintainability, and business alignment are critical. 𝗖𝗢𝗥𝗘 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 𝙍𝙪𝙗𝙮 𝙤𝙣 𝙍𝙖𝙞𝙡𝙨 (𝘿𝙚𝙚𝙥 𝙀𝙭𝙥𝙚𝙧𝙩𝙞𝙨𝙚) + 10+ years of hands-on experience building and scaling production-grade Rails applications + Strong emphasis on clean architecture, performance optimization, and maintainable systems + Extensive experience working with complex business domains, high-traffic applications, and large-scale datasets + Modern Rails ecosystem expertise including Hotwire, Turbo, Stimulus, and API-first architectures 𝘾𝙡𝙤𝙪𝙙 & 𝘿𝙚𝙫𝙊𝙥𝙨 + Designing and managing scalable infrastructure on AWS (EC2, RDS, S3, Lambda, CloudFront) + Experience with Google Cloud Platform and Heroku for rapid deployment and scaling + Building and maintaining CI/CD pipelines using GitHub Actions, GitLab CI, and CircleCI + Containerization with Docker for consistency across development and production environments + Monitoring, logging, alerting, and performance optimization * Strong focus on building cost-efficient and scalable systems from the early stages 𝘽𝙪𝙨𝙞𝙣𝙚𝙨𝙨 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 & 𝙋𝙧𝙤𝙙𝙪𝙘𝙩 𝙎𝙩𝙧𝙖𝙩𝙚𝙜𝙮 + Translating business objectives into practical and scalable technical roadmaps + Planning MVPs with the right balance between speed, scalability, and long-term sustainability + Identifying technical risks early, including scaling bottlenecks and technical debt + Collaborating directly with founders on product direction, feature prioritization, and strategic decisions + Supporting pre-sales through technical consultation, solution architecture, and project estimation + Extensive experience working with international clients, particularly across AU/US markets, with strong communication and alignment skills 𝙎𝙝𝙤𝙥𝙞𝙛𝙮 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 + Custom Shopify theme development focused on performance and conversions + Development of both private and public Shopify apps + Shopify API integrations including payments, fulfillment systems, and third-party services + Storefront performance optimization and UX improvements + Migration of legacy eCommerce platforms to Shopify 𝙋𝙡𝙖𝙩𝙛𝙤𝙧𝙢𝙨 & 𝙎𝙚𝙧𝙫𝙞𝙘𝙚𝙨 + Spree Commerce customization and scaling + Sharetribe marketplace development + WordPress custom development, API integrations, and headless implementations + Building fully custom platforms from the ground up when existing solutions are limiting 𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞 + Outcome-focused - prioritizing business impact, not just code delivery + Highly proactive - identifying risks and proposing solutions before problems escalate + Ownership-driven - approaching projects with the mindset of a technical co-founder rather than a contractor + Clear and reliable communication, especially across distributed teams and multiple time zones + Long-term engineering mindset - building systems designed to scale instead of quick fixes that create future issues 𝗟𝗘𝗔𝗗𝗘𝗥𝗦𝗛𝗜𝗣 As the CEO leading an engineering organization of 50+ engineers: + Built and scaled a strong, product-focused engineering team + Delivered complex web and mobile projects across multiple industries + Maintained a 100%+ Job Success Score on Upwork since 2014 + Helped clients scale engineering teams rapidly without compromising quality 𝗪𝗵𝗮𝘁 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗼𝗺𝗺𝗼𝗻𝗹𝘆 𝗘𝗻𝗴𝗮𝗴𝗲 𝗠𝗲 𝗙𝗼𝗿 + Building MVPs that are fast to launch without becoming fragile later + Scaling existing products that are beginning to face performance or architectural issues + Re-architecting applications for better maintainability and scalability + Bringing senior engineering leadership into growing teams * Managing complex integrations involving APIs, third-party services, and data-intensive platforms If you’re looking for someone who brings both technical depth and product thinking, someone who can challenge assumptions, contribute strategically, and help build products that truly last. I’d be glad to connect.

🏆 Top Rated Plus — delivering future-ready Oracle, Cloud, and AI-powered solutions trusted by global clients. Hello! I'm Bilal Maqsood, an Oracle APEX Developer, OCI Cloud Architect, PL/SQL Expert, and AI Integration Specialist with a proven track record of building secure, high-performance, and intelligent applications. With 2+ years of experience and multiple successful Upwork projects, I combine Oracle development with modern AI technologies, automation, and advanced integrations to help businesses operate smarter and faster. 🌟 Core Expertise (Oracle + Cloud + AI) ✔ Oracle APEX Development Building scalable, secure, and feature-rich business applications with custom UI, dynamic actions, and advanced components. ✔ Oracle Cloud Infrastructure (OCI) Deploying cloud-native APEX apps, Autonomous DB, VCN setup, identity configuration, and performance optimization. ✔ AI Integration & Intelligent Automation Integrating AI-powered workflows, embedding NLP features, connecting chatbots, and enabling AI-driven decision-making inside APEX and backend systems. ✔ Agentic AI (AI Agents) Implementing smart AI agents that automate tasks, perform reasoning, interact with APIs, assist users, and enhance enterprise applications. ✔ Python API Development & Integrations Building REST APIs using Python, integrating AI models, NLP services, automation scripts, and external APIs into Oracle applications. ✔ SQL & PL/SQL Engineering Designing optimized data architectures, writing efficient packages, functions, triggers, and backend logic. ✔ JavaScript, UI/UX & Modern Front-End Enhancements Crafting interactive, visually appealing, and dynamic user experiences inside APEX using JS, jQuery, and Tailwind-style components. ✔ REST API Integration Connecting Oracle APEX with external services, AI platforms, cloud systems, and third-party enterprise tools. ✔ Jasper Reports Development Creating advanced, pixel-perfect reporting solutions with automation and dynamic data visualization. 🏆 Why Clients Choose Me 💖 Top Rated Plus — elite 3% freelancer on Upwork Modern skillset: Oracle + Cloud + AI Proven history of on-time, high-quality deliveries Scalable architectures designed for long-term growth Strong focus on security, performance, and clean code Transparent communication and professional project handling Experience working with global clients in diverse industries 🚀 What I Deliver Custom Oracle APEX enterprise applications Full OCI environment setup & cloud deployments AI features, NLP integrations, and intelligent automation Python-based REST APIs and backend integrations Secure API development & third-party system connectivity PL/SQL logic, database optimization & troubleshooting Jasper reporting, dashboards & automated scheduling UI/UX improvements, modular JS components & performance tuning I’m here to help you build secure, scalable, and AI-enabled Oracle solutions that are ready for the future of enterprise technology. If you're looking for a Top Rated Plus Oracle & AI Developer who can deliver modern, intelligent, and high-performing solutions— let’s collaborate and take your application to the next level. 💬 Ready to get started? Let's discuss your project!

I am a Senior Software Engineer specializing in building reliable, scalable backend systems and APIs using Ruby on Rails, Golang, Java, C# and Node.js. I focus on designing clean architectures, high-performance services, and secure data pipelines that support production-scale applications. My experience includes developing REST/GraphQL APIs, microservices, cloud native backends, and AI integrated systems. I have worked on platforms involving automation workflows, data processing, and AI-powered features, ensuring systems remain maintainable and efficient as they scale. I value clear architecture, performance optimization, and dependable delivery. If you need a backend engineer who can turn complex requirements into robust systems, I’m ready to help. I also have strong expertise as an AI Specialist and Cloud Engineer, delivering production grade AI solutions and cloud infrastructure for modern software platforms. My work includes LLM integration, RAG pipelines, AI agents, vector search, workflow automation, and cloud native deployments across AWS, GCP, and Azure using Docker, Kubernetes, serverless services, and CI/CD. I specialize in connecting intelligent features with robust backend architecture so systems remain scalable, secure, maintainable, and efficient in real world production environments.

Industry Expert Software Developer - Previously @ IBM, Microsoft Expert Vetted, Top Rated Developer | Scalable, Clean, Documented Code Always Technologies: - MongoDB, ExpressJS, React, NodeJS - React Native, Swift, Flutter - Python, Ruby, Ruby on Rails, PHP - .NET, C#, ASP.NET - OpenAI, LLM, Generative A.I Let's connect and discuss your project.

🚀 FREE 30-MIN ARCHITECTURE REVIEW LEAD SOFTWARE ARCHITECT 🚀 • 15+ YEARS IN BUSINESS • CONCIERGE-LEVEL SERVICE • 70+ Happy clients • ✅ 𝘈𝘷𝘢𝘪𝘭𝘢𝘣𝘭𝘦 from June 26th Welcome! Do you want to work with GoDaddy Senior Dev, Pfizer AI Engineer and a former Gartner Principal Engineer? I specialize in software architecture, Neo4j graph databases, and full-stack engineering across Node.js, Ruby on Rails, Python, and React. I have been building high-performance products since 2008. In 2015, I founded Sacred Graph, and now my team and I deliver complex SaaS MVPs 10x faster by leveraging AI-driven development. Proud to have founded and launched multiple personal and clients' startups, taking them from raw idea to market-ready production. As the CEO of SacredGraph, I personally take responsibility for: - Estimate scope, WBS, KPI identification, and milestone planning for PoC, MVP, and Production. - Design scalable, secure systems and identify neurosymbolic AI capabilities. - Lead a specialized team of engineers and perform 100% code reviews before delivery. 𝗛𝗼𝘄 𝘆𝗼𝘂 𝗰𝗮𝗻 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝘂𝘀: Starting from scratch? Get a full-cycle development from the first line of code to global launch. Ongoing project with your team? Our architects join your squad to solve "impossible" technical bottlenecks and provide training if needed. Got a stalled project? We fix, finish, and optimize legacy or stuck codebases to production standards. You get rights to 100% of the code. CTO option is available. Further retaining service is always provided :) 𝗛𝗼𝘄 𝗜 𝗲𝗻𝘀𝘂𝗿𝗲 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆: 15+ Years Experience: Deep roots in Java, Ruby, and Python across Hospitality, Fintech, Healthcare and more. Certified Graph Data Science expert. Leader of a team of engineers at SacredGraph. Agentic Engineering: Using Cursor/Claude and spec-driven development to cut development time by 50% without sacrificing quality. Roadmapped Success: Every project starts with a written roadmap for PoC, MVP, and production (Architecture + Time/Cost). You get a personal project manager and access to all tasks for clarity in ClickUp. 𝗪𝗲 𝗮𝗿𝗲 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝗱 𝗶𝗻: - Graph Databases. Deep Neo4j expertise, semantic web, and complex relational-to-graph data modelling. Ontologies and highly accurate pipelines with 99% accuracy rates. - AI & Machine Learning. AI Agentic engineering, LLM workflows, and Neurosymbolic AI. - SaaS MVPs. Rapid prototyping and scaling for startups with a focus on business KPIs. Working under pressure with a consultancy on raising investment funds. - Enterprise Solutions. High-load architectures, microservices, and secure cloud deployments. - Healthcare & Fintech. HIPAA-compliant architectures and secure payment integrations (Stripe). 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 𝘄𝗲 𝘂𝘀𝗲 𝗱𝗮𝗶𝗹𝘆: - Languages: Java, Ruby, Python, TypeScript. - AI Stack: Agentic Engineering (Cursor, Claude), OpenAI API, LLM-based automation. - Frontend: React.js, Vue.js, Node.js. - Databases: Neo4j, PostgreSQL, Supabase, MySQL, MongoDB, Redis. - Cloud & Infra: AWS, GCP, Alibaba, Terraform, Docker, Kubernetes, CI/CD (GitHub Actions, Jenkins). - Strategy: Event-driven architecture, SDK/Framework design, TDD, Well-Architected Framework (cloud). Our preferred locations: US, UK, Ireland, EU, Middle East (HQ in Dubai). 𝗖𝗹𝗶𝗲𝗻𝘁 𝗳𝗲𝗲𝗱𝗯𝗮𝗰𝗸: “Sacred Graph delivered on time, high-quality thinking, and work outputs. The team had a high pace of work and quick scaling of group knowledge development. Their project management was very strong and everything was on point.” — Co-Founder, Enterprise Semantic Platform (Clutch Review) 𝗪𝗿𝗶𝘁𝗲 𝘁𝗼 𝗺𝗲 𝗵𝗲𝗿𝗲 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸, share your vision, and I’ll get back to you with a roadmap and the fastest safe path to production. Thank you! With best regards, Maxim