Arthur T.

Senior Full Stack Engineer | Next.js & NestJS Specialist Are you looking for a Senior Full-Stack Engineer who can bridge the gap between complex business logic and robust, scalable architecture? With 8 years of production experience, I specialize in building, optimizing, and scaling TypeScript-based ecosystems. I design secure enterprise SaaS platforms, real-time dashboards, and high-performance applications using Next.js, Angular, and NestJS, ensuring your infrastructure can scale alongside your business without breaking. Since I already have a proven track record on Upwork, my focus remains on delivery, clean code (SOLID/DRY), and high-level communication. What I solve for you? • End-to-End SaaS Architecture: Full-stack implementation using Next.js/NestJS paired with robust databases (PostgreSQL, MongoDB).. • Real-Time & Data-Heavy Systems: Expert in building interactive, low-latency dashboards utilizing WebSockets, SSE, and advanced data visualization libraries (D3.js, Chart.js).. • Security & Compliance: Bulletproof implementations of JWT, RBAC (Role-Based Access Control), secure HTTP-only cookies, and CSRF protection.. • Performance Optimization: Drastic reduction in loading times through server-side caching (Redis), lazy loading architectures, and SSR strategy adjustments.. Featured projects & expertise: • Enterprise Multi-Tenant SaaS Platforms: Specialized in building user-management matrices, automated billing hooks, and multi-tenant isolation workflows.. • Geolocation & Tracking Engines: Advanced experience integrating Google Maps API, handling real-time route rendering, clustering, and location data management.. • Automated Background Processing: Heavy experience managing background queues, automated reporting engines (PDF, Excel, CSV generation), and cron jobs via NestJS.. Enterprise Tech Stack: • Frontend: Next.js, Angular (4+ years), React, Tailwind CSS, Material UI.. • Backend & DB: NestJS, Node.js, Prisma ORM, PostgreSQL, MongoDB, Redis.. • Cloud & DevOps: AWS (S3, Lambda, EC2 deployments), Firebase, Git/CI-CD.. The Senior Advantage: • Maintainable Foundations: I write predictable code that scales. I integrate third-party wrappers, abstract external API logic, and keep components lightweight so your team can extend the app effortlessly.. • Pragmatic Delivery: I don’t just implement features; I evaluate actively maintained open-source ecosystems before adding overhead to your platform.. Ready to take your infrastructure to the next level? Click the "Invite to Job" button and let's hop on a brief alignment call.