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I am an Expert Full Stack Developer and Technical Lead with 10+ years of experience designing, developing, and delivering secure, scalable, and high-performance enterprise applications. My expertise includes React, Next.js, Node.js, Java, Spring Boot, Microservices, REST APIs, AWS, Kubernetes, Kafka, and AI-powered application development. I help businesses build modern web applications, backend services, cloud-native platforms, and enterprise-grade systems that are reliable, scalable, and easy to maintain. I have strong experience in both frontend and backend development, with a focus on clean architecture, performance, security, and production-ready delivery. My technical expertise includes: Frontend: React, Next.js, JavaScript, TypeScript, HTML, CSS Backend: Java, Spring Boot, Spring MVC, Spring Security, Node.js, REST APIs, GraphQL, gRPC, SOAP Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, GitHub Actions, Terraform, CI/CD Databases & Messaging: Oracle, PostgreSQL, MySQL, SQL Server, MongoDB, Redis, Kafka, RabbitMQ, ActiveMQ AI & Modern Apps: AI integration, API-based AI solutions, cloud-based intelligent applications Testing & Quality: JUnit, Mockito, API testing, performance tuning, logging, monitoring, code review In my recent technical leadership role, I architected cloud-based and serverless platforms using AWS, Spring Boot, Kafka, and Kubernetes, helping improve loan processing speed by 35%, reduce infrastructure costs by 30%, and improve approval accuracy by 15%. I have also designed secure systems for managing sensitive customer data, implemented CI/CD automation, mentored developers, and delivered enterprise solutions in highly regulated environments. I can help you with: Backend and full stack application development React / Next.js web application development Node.js API development Java Spring Boot microservices REST API and GraphQL API development AWS cloud-native application development AI feature integration into existing applications Kafka / RabbitMQ / ActiveMQ integration Database design and query optimization Legacy system modernization CI/CD setup and deployment automation Performance tuning and troubleshooting Technical architecture and code review I believe in delivering clean, maintainable, secure, and production-ready solutions with proper documentation, testing, logging, and best engineering practices. Let’s connect if you need a reliable full stack developer who can design, build, troubleshoot, and deliver modern Java, React, Node.js, AI, and cloud-based applications.

🎯 100% Refund If I set the wrong expectations and can’t deliver. No questions asked. Top-Rated Plus, Upwork Top 1 Percent, Highly recommended. What do I offer: 1- 100% work satisfaction 2- 24/7 Support 3- On-time delivery 4- Enterprise quality 5- 15 Days of free support after completion of the project Cloud Architect with 10+ years of DevOps experience, specializing in scalable, platform-agnostic cloud infrastructures. Proven track record in high-scale environments. Proficient in Infrastructure as Code, automation, and scripting, with expertise in CI/CD, Cloud Services, and Infrastructure Automation. Skilled in building, deploying, and managing applications on AWS, GCP, Azure, and OCI, with a focus on robust monitoring and observability. ➜ Zazmic Inc, San Francisco, CA • Automation Tools: Terraform, Ansible • Cloud Platforms: GCP • Containerization: Docker, Helm charts • CI/CD: GitLab CI • Monitoring: HPA, Cloud Armour • Databases: Different kinds of databases on GCP ➜ Tripleseat, Concord, Massachusetts • Cloud Platforms: Azure, GCP • Containerization: Docker • CI/CD: Azure Pipelines, Azure DevOps • Monitoring: Grafana, Prometheus ➜ Century Communities, Inc., Greenwood Village, CO • Cloud Platforms: AWS, Oracle Cloud • Automation Tools: Lambda functions, Ansible • Containerization: Docker, AWS ECS, EKS • CI/CD: CircleCI, GitHub Actions, AWS CodePipeline • Monitoring: CloudWatch, CloudFront ➜ Summary: • Proficient in Kubernetes, I architect and manage clusters to facilitate agile and scalable application deployment. • Skilled in Infrastructure as Code (IaC), I employ Terraform, Ansible, and Chef to automate configuration and ensure uniform environments. • With hands-on experience in CI/CD pipeline creation and maintenance using Jenkins, GitLab CI, and Azure DevOps, I ensure the efficient and reliable delivery of software products. • Possessing a robust background in Linux/UNIX system administration, including expertise in managing RHEL environments. • Armed in scripting with Bash and Python to streamline automation processes and optimize operational efficiency. • Good Know how of monitoring and logging tools such as Elasticsearch, CloudWatch, Prometheus, and Grafana, enabling proactive monitoring of infrastructure and application health. • Experienced in VMware virtualization, proficiently managing VMs, executing V-motion operations, and maintaining Snapshots. • Adaptable to fast-paced 24/7 production environments, providing responsive on-call support, including weekends. • Successfully deployed and managed scalable microservices on Kubernetes clusters across GCP and AWS platforms. • Expertise extends to migrating on-premises workloads to the cloud, focusing on performance optimization and cost efficiency. • Possess proactive problem-solving and troubleshooting skills essential for maintaining high-quality production environments. • Strong communication and collaboration abilities, facilitating effective bridging of the gap between development and operations teams. ➜ Tools: Git, Ansible, AWS CloudFormation, ELK, GitLab, GitLab CI/CD, Terraform, Docker Compose, Grafana, Telegraf, CircleCI, Traefik, Amazon CloudWatch, Amazon Elastic Container Service (Amazon ECS), GitHub, VPN, AWS Fargate, Amazon CloudFront CDN, AWS IAM, Amazon Virtual Private Cloud, Docker Swarm, NGINX, Puppet, Jenkins, Amazon EKS, Amazon Simple Queue Service, RabbitMQ, Celery, TeamCity, Nagios, Makefile, AWS CodeDeploy, Confluence, AWS CodeBuild ➜ Platforms: Linux, Docker, Amazon Web Services, AWS Elastic Beanstalk, Amazon EC2, Kubernetes, AWS Lambda, Windows, Apache Kafka, JVM, Heroku, Azure, WordPress, New Relic, Windows Server, Google Cloud Platform, Blockchain, Rancher ➜ Storage: Amazon Aurora, Amazon S3, MySQL, MongoDB, InfluxDB, Redis, On-premise, Amazon DynamoDB, Redis Cache, Elasticsearch, MySQL, Databases, PostgreSQL ➜ Languages: Python, Bash, Java, PHP, Markdown, Go, JavaScript, SQL, TypeScript ➜ Frameworks: Flask, Django, Windows PowerShell, .NET, Serverless Framework ------------------------------------------------------------------------------------------------------ #CloudArchitect #DevOps #Kubernetes #Terraform#Azure #GCP #Docker #CI_CD #InfrastructureAsCode #CloudMigration #DevOpsEngineer #Automation #CloudInfrastructure #Microservices #CloudSecurity #NetworkSecurity #AWSCloud #AzureCloud #Serverless #AWSLambda #AzureDevOps #GitLabCI #GitHubActions #Linux #Unix #Bash #Python #GoLang #Java #Git #Ansible #Jenkins #NGINX #ApacheKafka #Databases #SQL #MySQL #PostgreSQL #MongoDB #Redis #DynamoDB #CloudStorage #S3 #CloudWatch #BackendInfrastructure #WebInfrastructure

PHP Development and Web Server administrative tasks for hire. I know how to feed and care for most servers. Self-employed for the last 20 years, small business owner, and Internet Consultant. Thirty years networking experience, five years with IT for fortune 500 companies, and twenty one installing and managing Linux web hosting servers. My best skills involve the nuts and bolts mechanics. Proficient in: PHP, Linux, Apache, Networking, CentOS, AlmaLinux, Rocky Linux, Web Hosting, Email Deliverability Troubleshooting, PayPal IPN, cPanel/WHM, WP Engine, phpMyAdmin, PDO, Regular Expressions, (RegEx) many forms of API, Domain Registration and Management, and SSL installation with complete site configuration. Also: Virus or Hack removal, WordPress and PHP Security, Site hardening, WordPress Rest API, Site Speed Optimization, Google Console, PHP 7.x/PHP 8.x Compatibility Preparation, and some SEO. WordPress: WordPress Management, Custom Plugins, Theme and Plugin Modifications, Customizing the WP Dashboard, Speed Updates, Malware Detection and Removal, and WordPress Multisites. Some additional languages: MySQL, HTML, JavaScript, jQuery, CSS, Bash

Networking support: SSLs, Security, DNS, malware & virus removal, bot protection, site transfers, server support: Linux, Redhat, Ubuntu, MacOS, Windows Server, IIS and Apache. I am A+ Comptia certified with a Cisco Networking Essentials certificate, and Amazon AWS Cloud Practitioner certificate. Can build custom WordPress plugins. We specialize in WordPress and eCommerce. We can get your business up and processing credit cards with Stripe, Braintree, PayPal, Authorize .Net, or just about anyone you want. I am an experienced PHP WordPress Developer with a strong background in web development, networking and SQL. I have a proven track record of building and maintaining WordPress sites, developing custom plugins, and managing complex network systems. My expertise extends to various programming languages, operating systems, and web technologies, making me a versatile and valuable asset. Jeff has years of experience with the web technology & computer networking and holds degrees in Technology, Business, plus has numerous certifications. Network Administrator for Windows Server 2022, 2019, 2016, 2012, also for Linux Redhat, and Ubuntu. Get your business online today with a 100% PCI Compliant payment solution. Don't take chances with your customer's credit card information; risking costly charge backs, lost revenue, or legal problems. Have us do your payment forms. SKILLS: Languages/Scripts: PHP, JavaScript, MySQL, MariaDB, HTML, XHTML, CSS3, Regular Expressions, XML & XSLT, ASP, VBScript, Perl, JQuery, JSON, SOAP, Pascal, Assembly Language for 680x0 processors Operating Systems: Windows Server 2022, 2019, 2016, 2012R2, 2008, 2003; Windows Desktop: 11, 10, 8.1, 8, 7, Vista, XP; Mac OS X, Classic Macintosh, Linux, RHEL (Red Hat), CentOS, Ubuntu, Oracle, Fedora, Debian, Rocky, Alma Linux, Cisco IOS, Apple iOS, Android, and more . . . Web: Internet Information Server (IIS) 10, 8, 7, 6 Apache 2, WordPress, Elementor, WooCommerce Software: Adobe CC, Creative Suites CS6, CS5, CS4, Dreamweaver CC, Visual Studio, MS Expression Web 4, Photoshop, GIMP, Illustrator, Inkscape, Office 365 Networking: Active Directory, VirtualBox, Hyper-V, VMWare, PowerShell, VPN, DNS, cPanel, WHM Accounting: Peachtree, Sage 50, QuickBooks, Tax Preparation, GnuCash, Deprecation, Payroll, Inventory Terms: Minimum billing is one (1) hour.

Hello! I'm Patrick Cohen, a driven individual with years of hands-on hardware and software experience gained by working on embedded systems, IoT, and data analytics projects. I have worked with different microcontrollers, circuitry, and various modules. I have worked on projects that have included parts such as: Microcontrollers: - Esp32 (WiFi, BLE, IoT Cloud Services Integration) - NRF Nordic Semiconductor - Esp8266 (WiFi, IoT) - Arduino (Uno, Mega, Nano, Micro, Nano 33 BLE) Microcomputers: -Raspberry Pi -Jetson Nano -Jetson Xavier NX Additional Modules: -Adafruit RFM95W LoRa Radio Transceiver Breakout -HC-05 Bluetooth module -SH-HC-08 Bluetooth Low Energy module -GSM Cellular Module -NRF24L01 Wireless Transceiver -Ultrasonic sensor (Detect distance) -LM35 Temperature Sensor -RFID Wireless Card -Relay modules -Servos -DC Motors I have also worked on projects that contain the following functionalities: -Android application development to control Arduino circuit via Bluetooth and WiFi. -Analog circuits to control the level of power through the motor. -HBridge motor driver for opposite motor polarity (clockwise and counterclockwise rotation). -Solar-powered microcontroller projects that have implemented deep sleep code for prolonged operation.

🚀 Ex-Meta / Yahoo | AI Full-Stack Engineer | GenAI, LLM, SaaS, APIs I build end-to-end AI products — from LLM-powered features to scalable full-stack systems. With 10+ years at Meta, Yahoo, and startups, I’ve shipped production systems used by millions and designed platforms that scale reliably. I focus on delivering real, usable AI applications — not just demos. ✅ What I Can Help You Build: • GenAI Applications: GPT / Claude integrations, AI copilots, workflows, prompt engineering • RAG Systems: chat over documents, knowledge bases, retrieval pipelines • Full-Stack AI Apps: frontend + backend + APIs + AI integration • AI Agents: tool-using agents, automation workflows • Backend Systems: scalable APIs, microservices, cloud architecture • AI SaaS: MVP → production-ready systems 💼 Experience Highlights: • Meta — built large-scale production systems • Yahoo — personalization systems serving billions of requests/day • Indeed / Workday — scalable backend and cloud platforms • Tech Lead — owned architecture and built systems end-to-end • Real-time systems processing TBs/day (Kafka, distributed systems) 📊 What You Get: • End-to-end builder (AI + full-stack + product) • Production-ready systems, not fragile prototypes • Scalable architecture from day one • Fast execution and clear communication 🔧 Tech Stack: AI: GPT-4/5, Claude, RAG, AI agents, prompt engineering Frontend: React, Next.js, TypeScript Backend: Python (FastAPI, Flask), Node.js, Java, Scala, APIs, microservices Cloud: AWS (S3, Lambda), serverless architecture Infra: Docker, Kubernetes, CI/CD Data: Spark, Kafka Databases: PostgreSQL, MySQL, MongoDB, Redis 🎯 Typical Projects: • AI chatbot / copilot • RAG over internal/company data • AI SaaS MVP • Full-stack GenAI applications • Workflow automation with LLMs Keywords: Generative AI, GenAI, LLM, GPT-4, GPT-5, Claude, OpenAI API, Anthropic Claude, RAG, Retrieval Augmented Generation, AI Agents, Prompt Engineering, AI Automation, Chatbots, Copilots, Python, FastAPI, Flask, Full-Stack Development, Frontend Development, Backend Development, React, Next.js, TypeScript, Node.js, API Design, REST APIs, GraphQL, Microservices Architecture, SaaS Development, Multi-Tenant Systems, Authentication, OAuth, JWT, Cloud Architecture, AWS, Serverless, Docker, Kubernetes, CI/CD, Distributed Systems, System Design, PostgreSQL, MySQL, MongoDB, Redis, Machine Learning, MLOps, Data Engineering, Apache Spark, Kafka Industries: AI Platforms, SaaS, Enterprise Software, AdTech, MarTech, E-commerce, Marketplaces, FinTech, Payments, Healthcare, HealthTech, Developer Tools, Productivity Tools, Analytics Platforms, Data Platforms, Media, Social Platforms