Md Riaz M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Have an idea that needs to become a real product? I can help take it from concept → MVP → production → scale. I'm Md Riaz Mahmud, a Senior Full-Stack & SaaS Product Developer and the founder of Appstick, a software product development company focused on building web, mobile, SaaS, marketplace, and business platforms. Over the years, I've worked on and led the development of 20+ software products and delivered projects for clients across different markets. My experience spans from early-stage MVPs to complex production systems requiring multiple applications, integrations, business workflows, scalable infrastructure, and long-term development. What I can help you build Startup MVPs Turn an idea, prototype, or business requirement into a working MVP Product architecture and technology planning Web + mobile application development Backend/API development Admin dashboards Authentication, payments and third-party integrations SaaS & Business Platforms SaaS products POS & inventory systems CRM & ERP platforms HRM & business management systems Subscription-based platforms Multi-tenant applications Marketplaces & Platforms B2C marketplaces B2B / wholesale marketplaces Service marketplaces Property platforms Pet marketplaces Delivery and logistics platforms Web & Mobile Applications React / Next.js applications Node.js / NestJS backends Flutter mobile applications iOS applications REST APIs and integrations Real-time applications Existing Product Development New features Application modernization Performance optimization API integrations Architecture improvements Bug fixing and technical debt reduction Production deployment and maintenance Technology Stack Frontend: React, Next.js, JavaScript, TypeScript, Tailwind CSS Backend: Node.js, NestJS, Express.js, Laravel Mobile: Flutter, iOS / Swift Database: PostgreSQL, MongoDB, Redis Infrastructure: AWS, Docker, Kubernetes, Cloudflare Architecture: REST APIs, Microservices, SaaS, Multi-Tenant Systems, Cloud-Native Applications Why clients work with me I don't approach projects as simply "coding tasks." I focus on understanding the business model, users, workflows, technical requirements, and long-term product goals before deciding how the system should be built. Depending on your project, I can help with: Idea → Product Strategy → Architecture → UI/UX → MVP → Development → Testing → Deployment → Production → Scaling For larger projects, I also have access to the engineering capabilities of Appstick, allowing us to support projects that require multiple disciplines and long-term development. Some products and platforms I've worked on Shopstick — SaaS POS, inventory, e-commerce, and business management platform Car2Go / Car2Go Pro — Ride-sharing and mobility platforms Pet Marketplace — Multi-sided pet marketplace platform Gymstick / Gymstick Pro — Gym and fitness management platforms Travelstick — Travel platform Taxstick — Tax/business platform Homestick — Property management platform And other SaaS, marketplace, and business applications Whether you are: → A founder with an idea → A company building a new digital product → An organization modernizing an existing system → Or an agency looking for a reliable development partner I'd be happy to discuss your requirements and determine the best way to take the project forward. Let's turn your idea into a production-ready product.