Khimaji Valukiya — Senior Full-Stack Developer · Cloud Solutions Architect · ERP & API Integration Specialist
Senior full-stack engineer and cloud solutions architect with 12+ years of hands-on experience designing, deploying and operating production applications on AWS and Microsoft Azure. Proven track record of architecting scalable, secure and cost-efficient cloud infrastructure for web, API and enterprise systems, integrating Microsoft Dynamics 365 Business Central ERP with custom web, mobile and eCommerce applications, and owning delivery end-to-end from architecture through production support.
Senior Full-Stack Developer, Cloud Solutions Architect (AWS / Azure), ERP & API Integration Specialist, AI Solutions Expert, Your Trusted IT Partner
Core Competencies
- AWS & Azure Architecture
- Cloud Migration & Modernization
- High Availability & Auto Scaling
- Dynamics 365 Business Central
- REST / OData API Integration
- ERP · CRM · eCommerce Integration
- CI/CD & Azure DevOps
- Security, IAM & Key Vault
- Monitoring & Observability
- Performance & Cost Optimization
What I Do
- Full-Stack Expertise: 12+ years building fast, secure, and scalable web applications using Next.js, Laravel, PHP, Node.js, and React.
- AWS Cloud Architecture: EC2, S3, RDS, Lambda, CloudFront, Route 53, VPC, ECS/ECR, ElastiCache and Auto Scaling for high-availability hosting.
- Microsoft Azure Architecture: App Service, Virtual Machines, Azure SQL, Functions, Blob Storage, Entra ID, Key Vault and Azure Load Balancer.
- Dynamics 365 Business Central: Bi-directional ERP integration over Standard/Custom APIs, REST and OData — customers, items, orders, invoices and payments.
- Cloud Migration & Modernization: Move legacy stacks onto AWS/Azure with zero-downtime cutovers, containerization, managed databases and cost reduction.
- AI & Machine Learning: Building intelligent applications with OpenAI, Claude, LangChain, and custom ML models for automation and insights.
- AI Chatbots & Agents: Developing conversational AI chatbots, virtual assistants, and autonomous agents using LLMs and RAG architectures.
- UI/UX & SEO Focused Design: Pixel-perfect, responsive layouts with W3C-compliant code, SEO-optimized structure, and mobile-first design.
- Performance Optimization: Improve load times, TTFB, Core Web Vitals with code-level and server-side optimization, caching, and indexing.
- Backend Architecture: Robust backend systems with Laravel, Node.js, REST APIs, clean architecture, and scalable microservices.
- Database Expertise: Advanced experience with MySQL, PostgreSQL, and MongoDB including query optimization and schema design.
- Mobile App API Development: I design lightweight and secure APIs for Android/iOS apps using RESTful architecture and scalable backend.
- CI/CD & Azure DevOps: Azure DevOps and GitHub pipelines, Dockerized deployments, environment management and automated release workflows.
- Monitoring & Observability: CloudWatch, Azure Monitor and Application Insights for logs, metrics, alerting and production incident resolution.
- Twilio Integration: Implemented SMS, WhatsApp, and voice call features using Twilio APIs for verification, alerts, and automation.
- Ubuntu Server Configuration: Server setup, NGINX/Apache config, SSL, domain pointing, cron jobs, firewall security, and Docker containers.
- E-Commerce Development: Magento 2 & custom eCommerce with seamless checkout, product filtering, cart management, and payment integration.
- Security First Development: IAM least-privilege, Entra ID, Key Vault secrets, SSL/TLS, input validation and secure deployment on all layers.
- Research & Debugging: I solve complex problems quickly through in-depth debugging, research, and reverse-engineering bottlenecks.
- End-to-End Ownership: From wireframes to live production, I handle design, dev, testing, optimization, and server deployment with accountability.
- Result-Oriented Delivery: I think beyond requirements to deliver real business impact, focusing on usability, conversion, and long-term value.
Cloud, ERP & DevOps Expertise
Amazon Web Services (AWS) — Compute, data, networking and operations on AWS
- Compute & Containers: EC2 provisioning, Linux hardening and tuning; containerized deployments with ECS/ECR and Docker; Lambda for serverless, event-driven workflows.
- Storage & Data: S3 for assets, documents and backups; RDS managed relational databases with configuration, optimization and maintenance; ElastiCache/Redis for caching.
- Networking & Delivery: VPC design with public/private subnets and security groups; Route 53 DNS; CloudFront CDN; Elastic Load Balancing and Auto Scaling for high availability.
- Security & Operations: IAM least-privilege roles and policies; SSL/TLS and firewall configuration; CloudWatch logs, metrics and alerting; troubleshooting across server, network, database and application layers.
Microsoft Azure — Hosting, identity, data and DevOps on Azure
- Compute & Hosting: Azure Virtual Machines (Linux/Windows), App Service for web apps and APIs, Azure Functions for serverless workflows, Azure Load Balancer.
- Data & Storage: Azure SQL Database deployment, configuration and maintenance; Blob Storage for files and objects.
- Identity & Security: Microsoft Entra ID (Azure AD) authentication and access management; Key Vault for secrets, keys and certificates; Virtual Network architecture.
- DevOps & Monitoring: Azure DevOps source control and CI/CD pipelines; Azure Monitor and Application Insights for logging, diagnostics and performance analysis.
Dynamics 365 Business Central — ERP integration, sync and production support
- Application Integration: Integrated Business Central with custom web, mobile, eCommerce and CRM applications using Standard APIs, Custom APIs, REST and OData endpoints.
- Data Synchronization: Built bi-directional synchronization for Customers, Vendors, Items/Inventory, Sales & Purchase Orders, Invoices, Payments and financial data with mapping, validation and reconciliation.
- Auth & Reliability: Handled API authentication and authorization (OAuth 2.0 / Entra ID) and resolved data inconsistencies, sync failures and performance issues in production.
API, Integration & DevOps — Middleware, pipelines and production operations
- API & Middleware Design: Designed RESTful APIs and middleware in PHP/Laravel and Node.js/Express with validation, error handling, logging and third-party integrations (Stripe, Twilio, payment and messaging services).
- Delivery & Operations: CI/CD pipelines, Docker, Nginx/Apache tuning, database optimization, SSL, DNS, backup and recovery, and production incident resolution.
Skills & Technologies
Cloud — AWS
- EC2 / Auto Scaling / ELB — 92%
- S3 / CloudFront / Route 53 — 92%
- RDS / ElastiCache — 88%
- Lambda / ECS / ECR — 85%
- IAM / VPC / CloudWatch — 88%
Cloud — Azure
- App Service / Virtual Machines — 88%
- Azure SQL / Blob Storage — 86%
- Functions / Load Balancer — 82%
- Entra ID / Key Vault — 85%
- Azure DevOps / Monitor — 86%
ERP & Integration
- Dynamics 365 Business Central — 90%
- REST / OData APIs — 93%
- OAuth 2.0 / Entra ID — 88%
- ERP / CRM / eCommerce Sync — 90%
Backend
- PHP/Laravel — 95%
- Node.js / Express.js — 92%
- Python — 85%
- REST APIs — 95%
- GraphQL — 80%
- CodeIgniter — 88%
Frontend
- React.js — 95%
- Next.js — 92%
- TypeScript — 90%
- HTML5/CSS3 — 98%
- Tailwind CSS — 88%
Database
- MySQL — 95%
- PostgreSQL — 90%
- MongoDB — 85%
- Redis — 82%
AI & ML
- OpenAI/GPT — 90%
- Claude AI — 88%
- LangChain — 85%
- RAG Architecture — 82%
DevOps
- Docker — 88%
- CI/CD Pipelines — 88%
- Ubuntu/Linux — 92%
- NGINX / Apache — 90%
- SSL/TLS · DNS · CDN — 90%
- Backup & Recovery — 86%
Mobile & eCommerce
- Flutter — 78%
- Magento 2 — 85%
- Stripe / Payments — 90%
- Twilio — 88%
Tools & Others
- Git/GitHub — 95%
- Azure DevOps — 86%
Highlights
- 12+ years across development, architecture and technical leadership
- Top Rated on Upwork: 40+ projects, 412+ hours, 100% job success
- Active contributor on GitHub and Stack Overflow
Work Experience
- 12+ Years Experience
- 40+ Jobs Completed
- 412+ Hours on Upwork
- 100% Job Success
Full-Stack Developer & Cloud / AI Solutions Consultant — Freelance (Upwork, Top Rated) (2022 - Present)
End-to-end web, API and mobile backend delivery on AWS and Azure for international clients — cloud architecture, Business Central ERP integration and AI features, from provisioning through production support.
- Deliver end-to-end web, API and mobile backend solutions on AWS and Azure for international clients; 40+ projects completed with a 100% job success score.
- Architect and provision cloud environments (EC2/VM, RDS/Azure SQL, S3/Blob, CDN, load balancing, auto scaling) with IAM/Entra ID access control, monitoring and automated backups.
- Integrate Dynamics 365 Business Central with client eCommerce, CRM and custom platforms via REST/OData APIs, including order, inventory, invoice and payment synchronization.
- Implement AI features (OpenAI/GPT, Claude, LangChain, RAG) and payment/communication integrations (Stripe, Twilio) in Laravel, Node.js and Next.js applications.
- Set up CI/CD pipelines and Dockerized deployments; reduce infrastructure cost and improve performance through caching, CDN and database optimization.
40+ Jobs Completed, 100% Job Success, Top Rated, 412+ Hours
Technical Project Manager — IT Services Firms (2018 - 2022)
Led cross-functional development teams delivering complex web, eCommerce and enterprise applications using agile methodologies, owning solution architecture and cloud infrastructure decisions.
- Led cross-functional development teams delivering complex web, eCommerce and enterprise applications using agile methodologies.
- Owned solution architecture and cloud infrastructure decisions, evaluating AWS/Azure services for performance, security, scalability and cost.
- Designed API-driven integration architecture between ERP, CRM, eCommerce, mobile and web systems, and translated business requirements into implementation plans.
- Established deployment pipelines, environment management, monitoring and production support processes.
Team Leadership, Solution Architecture, Agile/Scrum, Client Relations
Senior Full-Stack Developer — IT Services Firms (2015 - 2018)
Architected scalable applications with PHP/Laravel, Node.js and React; designed MySQL/MongoDB schemas and Redis caching layers, and managed the AWS infrastructure behind them.
- Architected scalable applications with PHP/Laravel, Node.js and React; designed MySQL/MongoDB schemas and Redis caching layers.
- Managed AWS infrastructure (EC2, S3, RDS, Route 53, CloudWatch), Linux server administration, Nginx/Apache configuration and SSL/TLS security.
- Built RESTful APIs and third-party integrations; mentored junior developers and led code reviews.
System Architecture, AWS Infrastructure, Code Reviews, Mentoring
Web Developer — IT Services Firms (2012 - 2015)
Developed custom web applications, eCommerce platforms (Magento 2) and content management systems in PHP/CodeIgniter, plus the hosting and deployments behind them.
- Developed custom web applications, eCommerce platforms (Magento 2) and content management systems in PHP/CodeIgniter.
- Handled hosting, DNS, server configuration, deployments and performance optimization for client websites.
E-Commerce Development, CMS Solutions, Hosting & Deployments
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