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Full-Stack Next.js & MERN Web Engineering

Investment RangeCustom Project Based Scope

Building highly scalable, type-safe, and ultra-performant full-stack web architectures.

Modern web platforms require uncompromising performance, deep security, and production scalability. I specialize in building full-stack ecosystems using the absolute vanguard of web technology. My frontend architecture is anchored in the Next.js 16 App Router paradigm, extracting maximum rendering speeds via React Server Components (RSC) to drastically reduce client-side JavaScript execution overhead. I build clean, ultra-responsive user interfaces with Tailwind CSS while maintaining completely type-safe data communication using Drizzle ORM or Prisma to map out high-concurrency PostgreSQL and MongoDB databases. Security is baked in from day one, using NextAuth v5 to manage role-based user access controls and encrypted session states. Every route I deploy is architected for low-latency serverless or edge runtime environments, optimized with sophisticated edge caching and bundle splitting to hit exceptional Core Web Vitals targets. This is the same engineering foundation I use whether the deliverable is a lean MVP or a full production SaaS platform - the architecture scales with the business, not against it.

Key Technologies & Platforms Used

Next.js 16React.jsNode.jsExpress.jsNest.jsTypeScriptPythonFastAPIDjangoPostgreSQLMongoDBDrizzle ORMNextAuth v5Tailwind CSS

Scope of Deliverables

  • Advanced Next.js 16 App Router and React Server Components (RSC) architecture
  • Type-safe data layers utilizing Drizzle ORM or Prisma engines
  • Robust relational database modeling (PostgreSQL) and flexible document stores (MongoDB)
  • Secure authentication mechanics built around enterprise NextAuth v5 protocols
  • High-efficiency, low-latency Serverless API route design patterns
  • Edge-network caching configuration for instantaneous global response times
  • Comprehensive asset optimization, bundle compression, and tree-shaking adjustments

Let’s Build Something Exceptional Together

Every project I take on is managed and delivered using high-performance engineering workflows and industry-standard project frameworks. I don't just write code; I establish production-grade technical scaffolding that ensures your application is scalable, maintainable, and built to last.

Engineering Workflows & Delivery Guarantees:

  • •Transparent Asynchronous Execution: Active project tracking via Jira & Linear with structured, data-driven sprint cycles.
  • •Rigorous MVP Prioritization: Enforcing strict MoSCoW parameters to maximize features while eliminating budget waste.
  • •Industrial-Grade Automation: Event-driven backend workflows and custom API integrations built on FastAPI, Node.js, and Python.
  • •Modern Elite Stack Integration: Type-safe, ultra-fast applications engineered with Next.js, React, Node.js, and Python.
  • •Full IP Ownership: You retain 100% ownership of the GitHub repositories, containerized Docker environments, and cloud infrastructure setups created.
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Frequently Asked Questions

Get technical answers to common questions about this service, operational workflows, and delivery mechanics.

Why do you choose React Server Components (RSC) over standard Client Components in modern Next.js?
React Server Components execute entirely on the server side, keeping large dependencies out of the client JavaScript bundle. This dramatically improves initial page load metrics, reduces First Contentful Paint times, and guarantees that search engine crawlers receive fully hydrated HTML layout text directly from the first byte, maximizing indexability.
How do you enforce complete type safety across the database and the frontend layout views?
I employ TypeScript end-to-end paired with Drizzle ORM. Database schemas are defined as single sources of truth in code, allowing Drizzle to automatically generate TypeScript interfaces. These types flow seamlessly from database queries through backend API routes directly to frontend component properties, catching data shape errors instantly during development.
What is your approach to structuring secure role-based access control using NextAuth v5?
I extend the core NextAuth session schemas to include custom authorization layers. User roles are verified inside secure server-side middleware configurations before page rendering or API route execution occurs. Access tokens are cryptographically signed using JWT strategies with short expiration windows, backed by secure database-stored refresh tokens.
How do you prevent SQL injection vulnerability risks when writing advanced raw database queries?
By utilizing modern ORM tools like Prisma or Drizzle, all database interactions are automatically converted into parameterized queries. When specialized raw SQL fragments are necessary, I enforce the use of strict SQL template literals that escape all input parameters natively within the database client driver, eliminating injection risks.
What optimization techniques do you apply to reduce large JavaScript bundle bloat?
I utilize aggressive code-splitting via dynamic imports for heavy components that are not needed immediately on load. I ensure all third-party libraries are tree-shaken, replace bulky utilities with lightweight modern alternatives, and audit bundle distributions using the Webpack Bundle Analyzer tool during continuous integration testing.
How do you manage cross-origin resource sharing (CORS) and site security headers in Next.js?
I configure a dedicated middleware layer that injects strict security headers, including Content Security Policy (CSP), Strict-Transport-Security (HSTS), X-Content-Type-Options, and X-Frame-Options into every response. CORS policies are restricted to explicitly whitelisted source domains to secure internal API endpoints.
What is the difference between Incremental Static Regeneration (ISR) and Partial Prerendering (PPR)?
ISR updates static pages in the background after deployment on a scheduled timer interval. PPR combines static shells with dynamic content streams on the same page by utilizing React Suspense boundaries. The static shell is delivered instantly from the edge network, while the dynamic components stream in as their data fetches complete.
How do you handle database migration updates without causing production system down-time?
I practice a strict multi-phase database schema evolution strategy. New database columns are introduced as optional fields in the first deployment phase, allowing the current code to operate without errors. Once the data layers migrate and the new code updates deploy, I apply constraints or drop old structures in a separate, isolated step.
How do you optimize slow-running database queries in PostgreSQL?
I analyze slow queries using the `EXPLAIN ANALYZE` execution planner tool to identify sequential table scans. I then build targeted indexes (such as B-Tree or GIN indexes) on frequently filtered fields, rewrite complex subqueries into clean Common Table Expressions (CTEs), and implement connection pooling to manage database resources effectively under heavy traffic.
What testing strategies do you employ to guarantee system resilience prior to launch?
I build a multi-tiered automated testing suite. This includes unit testing for isolated business logic using Vitest, integration testing for API data contracts, and complete end-to-end testing utilizing Playwright to simulate critical user paths like authentication and checkout workflows.

Client Success & Feedback

Read feedback and ratings from verified client projects delivered on Upwork, Fiverr, and directly.

Fiverr Verified

“Outstanding Full Stack Developer - Exceeded All Expectations! I hired Bhalli for a complex Full Stack project, and I couldn't be more impressed with the results. His code expertise is exceptional - he demonstrated deep knowledge of modern JS frameworks, best practices concerning agentic AI solutions, and clean coding principles. The code he delivered was not only functional but also well-structured, properly commented, and easy to maintain. Bug-Free Delivery: The entire project was delivered without a single bug. Bhalli thoroughly tested all functionality across different browsers and devices before submission. His attention to detail in error handling and edge cases shows true professionalism. Code Expertise: Bhalli's technical skills are top-tier. He implemented efficient solutions using modern JS framework (Next.js, Node.js, Express.js) features, optimized performance where needed, and followed industry-standard design patterns. He clearly understands not just how to make things work, but how to make them work well. Language Fluency: Communication was seamless. Bhalli's English is excellent, making technical discussions straightforward and productive. He understood requirements immediately and asked intelligent clarifying questions when needed. Proactive Communication: What really sets Bhalli apart is his proactive approach. He provided regular updates without being asked, suggested improvements to my initial requirements, and flagged potential issues early. He was always available and responded quickly to messages. The final result exceeded my expectations in both quality and delivery time. I will definitely work with Bhalli again and highly recommend him to anyone needing frontend development work. A true professional!”

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Andrew Satz

CEO, https://www.abtique.com
Fiverr Verified

“Outstanding Experience - True Full Stack Expert Hired Bhalli to build a multi-page web application and could not be happier with the results. - Work quality was exceptional; pixel-perfect implementation, fast load times, and clean code across the board. - Communication was proactive and clear from day one. He kept me updated consistently and asked smart, clarifying questions. - Speed was impressive as he delivered ahead of schedule without sacrificing quality. - Not only did he follow the designs, he also suggested improvements that made the frontend/backend even stronger. If you’re looking for a top-tier Full Stack developer who is reliable, skilled, and easy to work with, this is the person to hire. I’ll absolutely be working with him again!”

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Brett Averso

Chief Technology Officer, https://www.govio.ai
Fiverr Verified

“Great experience working with Bhalli. He delivered a frontend that met or exceeded expectations. Communication was fast and precise throughout; he proactively solved challenges and worked closely to ensure we matched what we wanted. He quickly adjusted to changes mid-stream. Highly recommended!”

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Brett Averso

Chief Technology Officer, https://www.govio.ai
Upwork Verified

“Bhalli is a quality talent; he put his soul into the project.”

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Ze Hassaby

Founder, https://risero.io/