Abdur R.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 7, 2026.

🏆 Top Rated Plus | 100% Job Success | Senior SaaS Engineer & Team Lead at Aqrendev 🥇 Trusted long-term engineering partner to startups, enterprises & global SaaS companies I’m Abdur Rahman — a full-stack engineer and technical lead specializing in scalable, production-ready SaaS platforms. I architect, build, deploy, and maintain complete applications with a strong emphasis on multi-tenancy, performance, reliability, and long-term maintainability. Over the past few years, I’ve delivered complex systems for startups, enterprise clients across Europe and the US, and multiple SaaS companies. At Aqren.dev, I lead architecture, guide a small engineering team, and ship high-quality, production-grade software on a consistent basis. I don’t just write code — I design systems that last. 🟢 What I Build I specialize in multi-tenant SaaS, serverless platforms, and data-heavy applications, including: - Multi-tenant SaaS (RLS, tenant isolation, permissions, audit logs) - E-commerce & payment systems (Stripe Connect, fees, onboarding flows) - Real-time platforms (LiveKit, WebSockets, Supabase Realtime) - AI-powered applications (OpenAI, Gemini, custom LLM pipelines) - Complex workflow engines (dynamic forms, automation, validations) - Dashboards for enterprises (analytics, scheduling, reporting) - Marketplaces, IoT systems, booking & service-based platforms If you need something complex, scalable, and built to grow, that’s my zone. 🟢 Backend Engineering (Core Expertise) I build highly scalable, clean, and maintainable backend systems: - Node.js / Express / Fastify - PostgreSQL + Prisma (optimized schemas, indexes, migrations) - Supabase (RLS, Edge Functions, RPCs, Realtime) - Redis caching, queues, rate-limiting - Kafka, RabbitMQ, Redis Queue - Stripe & Stripe Connect (payouts, fees, subscriptions) - Authentication (Supabase Auth, Firebase Auth, Auth.js, JWT) - LLM workflows: OpenAI, Anthropic, Gemini -Clean architecture, layered validation, consistent error handling 🟢 Frontend Development I convert complex systems into beautiful, intuitive interfaces: - React, Next.js, TypeScript - TailwindCSS, MUI, SCSS - Zustand, Redux, TanStack Query - PWA & SEO optimization - Framer Motion for smooth, modern animations - Fast, responsive, and optimized for real users. 🟢 DevOps & Deployment I own full production infrastructure end-to-end: - AWS (EC2, S3, CloudFront, SES, Lambda, Amplify) - CI/CD with GitHub Actions / GitLab CI - Docker, Linux servers, Nginx, Cloudflare - Vercel / Netlify deployments - Automated environments: dev → staging → production 🟢 Testing & Reliability - Jest / Vitest (unit + integration) - Cypress (e2e + component) - Load & performance testing - Monitoring + error reporting 🟢 Let’s Build Your Product — Properly If you need someone who can: - understand business logic - design the right system architecture - write scalable, production-grade code - integrate payments, auth, automation - lead a team or entire technical delivery - deploy and maintain a stable product …then you’re in the right place. I’d love to discuss your project and show how I can help. Best regards, Abdur Rahman