I architect and deliver production-grade backend systems that scale from high-throughput event pipelines to complex enterprise integration platforms. With 8+ years of hands-on experience in Java and the Spring ecosystem, I specialise in building microservices, RESTful APIs, and integration layers that handle real business complexity. My core strength lies in Apache Camel and Enterprise Integration Patterns (EIP), designing systems where data flows reliably across distributed services while integrating with third-party APIs and legacy platforms. At Narvar, I worked in the carrier integrations team where I helped reduce carrier onboarding timelines from days to hours, contributed to platforms processing 10M+ webhook tracking transactions daily, and helped replace legacy tooling with automated, scalable workflows. I also designed REST APIs for carrier booking flows, including return-via-pickup capabilities alongside traditional label-based returns. Earlier in my career, I built ingestion and streaming modules integrated with enterprise payment systems, gaining deep experience in high-throughput backend platform design. Currently, I am building a middleware data integration platform using Apache Camel and Change Data Capture (CDC) to enable secure and scalable data synchronization across multiple external systems. I bring strong engineering fundamentals including SOLID principles, Test-Driven Development (TDD), event-driven architecture, and distributed systems design. I focus not only on writing code but on designing systems that are resilient, scalable, and maintainable in production. ********CORE EXPERTISE******** Java (Core & Advanced) REST API Development Apache Camel & Enterprise Integration Patterns (EIP) Microservices Architecture Distributed Systems Event-Driven Architecture System Integration & Middleware Messaging Systems (Kafka, Pulsar, RabbitMQ) ********FRAMEWORKS AND TECHNOLOGIES******** Spring Ecosystem Spring Boot, Spring Cloud, Spring Security, Spring Integration, Spring AOP, Spring Actuator, Micrometer Messaging and Integration Apache Camel, Apache Kafka, Apache Pulsar, RabbitMQ, Spring JMS Build Tools Apache Maven Testing JUnit5, Mockito, Rest Assured, Postman, Apache JMeter ORM JPA, Hibernate, MyBatis Databases PostgreSQL, MySQL, Redis, Elasticsearch, Apache Cassandra Infrastructure and Deployment Docker, Kubernetes, CI/CD, CircleCI Cloud AWS (Lambda, S3, SQS, EC2) Monitoring Prometheus, Grafana Other Tools HashiCorp Vault, Auth0, Google Cloud Scheduler, Git Frontend (Basic) HTML5, CSS, Thymeleaf Recently, I started my freelance journey full-time, helping teams build scalable backend systems, APIs, and enterprise integration platforms. If you are looking for help with Java backend systems, microservices, or complex integrations, feel free to reach out. Vaishali Gupta Senior Engineer, Distributed Systems

I have been working as a Cloudera Administrator in Telecommunication/Financial industry. I am installing/configuring/monitoring production clusters around 15 and 18 node clusters. I am available for install/configure/fixing issues and tuning your clusters. I have followings skills and experience: Cloudera Administrator Linux Administrator Crontab scheduling Shell Scripting Mysql MariaDB HDFS, Impala Hadoop, SQL , ETL,, Tera Data , RDBMS, NoSQL (MongoDB), Warehousing, SSRS, Data migration from one source to another. Cloudera Hadoop, Sqoop, Flume, HDFS, Big Data technologies. Performance monitoring Impala, Spark and hive jobs HDFS replication management Enable HA on masternodes and HDFS Worked on upgrading cluster, commissioning & decommissioning of Data Nodes, Name Node recovery, capacity planning, and slots configuration. Cluster installation from scratch Add services Configure services Created CM dashboard for navigating services. CM User access management. Resolving bad and concerning health issues. Hands on experience on Redhat 7.5 Hands on experience with mysql (mariadb) for services configuration Configured cloudera navigator for audit logs Enabled HDFS HA Rebalance HDFS data on all hosts LDAP configuration on Cloudera Manager and Hue for business users login. Configure email alerts on service bad health Linux System Administration on RHEL Cloudera Administration on production server Resolving Cluster Health Issues. Configuring services in cluster. Enable and disable nodes for performing hardware activity Writing shell scripts Adding and configure new data node. Resolving bad health issues Crontab job scheduling Schedule spark and sqoop jobs using shell scripts Strong hands-on experience working with Impala, Hive, HDFS, Spark and YARN Strong hands-on experience with LDAP configuration. Strong hands-on experience with Master nodes HA and HDFS and other services. Adding and removing host from cluster. Experience with configuring dedicated cluster for KAFKA. Adding and removing dataodes in a secure way. Installed and Configured ELK and Configured Elasticsearch with Hadoop cluster for fast performance. Configured Cloudera Navigator Mysql user management Sentry user management Linux user management Experience in implementing and ongoing administrating infrastructure including performance tuning. Troubleshooting Spark jobs. Adding custom dashboards of Cloudera services health and memory charts. Hue user management Role assignment LDAP user management ELK use case Installation and configuration Elasticsearch, Kibana, and Logstash on test & production environment Extracted logs using Grok pattern Created Kibana dashboard. Integrated ELK with hadoop cluster for fast performance. I can do all that at very reasonable costs. Feel free to discuss your project.

Are you looking for a veteran engineer to build, secure, and optimize your infrastructure? Do you need zero-downtime migrations, automated deployments, or immediate server troubleshooting? I am a Senior DevOps Engineer and Linux Server Administrator with 16 years of overall experience managing high-traffic production environments. I started my journey in 2010, gained 2 years of corporate enterprise experience, and then transitioned to full-time freelancing. As a dedicated remote engineer and an AWS Certified Solutions Architect, I help businesses worldwide design scalable, highly available, and cost-efficient cloud architectures. I provide comprehensive, full-time remote support covering everything from initial infrastructure setup and automated application deployment to proactive 24/7 monitoring and performance tuning. 🛠️ CORE EXPERTISE & SERVICES ☁️ CLOUD & INFRASTRUCTURE ▪️ Platforms: AWS, GCP, Azure, DigitalOcean, Hetzner, Rackspace ▪️ Advanced architecture design, multi-region setups, and cloud cost optimization ▪️ High Availability (HA), load balancing, and auto-scaling configurations ⚙️ DEVOPS & AUTOMATION ▪️ CI/CD Pipelines: GitHub Actions, Jenkins, Bitbucket Pipelines ▪️ Infrastructure as Code (IaC): Terraform, Ansible ▪️ Containerization: Docker, Docker Compose orchestration ▪️ Automation: Advanced Bash scripting and custom cron management 🖥️ SERVER MANAGEMENT & DATABASES ▪️ OS Expertise: Ubuntu, CentOS, RHEL (Red Hat Certified) ▪️ Web Servers: Nginx, Apache, reverse proxy setups ▪️ Databases: MySQL, MariaDB, PostgreSQL, MongoDB (Setup, optimization & clustering) ▪️ Mail Servers: Postfix, Exim setup and deliverability optimization 🚀 PERFORMANCE OPTIMIZATION ▪️ Advanced caching: Varnish Cache, Redis, Memcached ▪️ Speed optimization: PageSpeed, CDN implementation (Cloudflare) ▪️ Kernel tuning and deep-dive resource bottleneck troubleshooting 🔐 SECURITY & HARDENING ▪️ DDoS protection, mitigation strategies, and Cloudflare WAF tuning ▪️ Firewall configurations, Fail2Ban, and ModSecurity implementation ▪️ SSL/TLS automation, malware detection, cleanup, and post-hack recovery 🔄 MIGRATION & 24/7 MONITORING ▪️ Zero-downtime website, server, and database migrations ▪️ Proactive monitoring setup for real-time uptime and performance alerts ▪️ Monthly infrastructure maintenance, patching, and support 🧰 CONTROL PANELS ▪️ cPanel / WHM, Plesk, Webmin, DirectAdmin, ISPConfig 🌟 WHY CLIENTS WORK WITH ME ▪️ 14+ Years of Production Experience: I manage live environments and know how to prevent issues before they impact your end-users. ▪️ Cost & Performance Focused: I don't just build; I optimize your setup to reduce your monthly cloud bill while boosting server speed. ▪️ Reliable Remote Support: Clear, proactive communication, reliable availability, and transparent documentation. I am available for full-time monthly contracts and 24/7 emergency support monitoring. Let’s ensure your infrastructure is secure, automated, and lightning-fast. Invite me to your job today, or send over a message to discuss your requirements!

Hello and welcome! I’m an Expert Full-Stack Cloud Engineer with 27+ years of experience in developing scalable web and mobile platforms. I can help you build your AWS, Azure, and GCP based web MVP or SaaS with backend databases like MySQL, MongoDB, Cassandra, DynamoDB, CosmosDB, SQL Server, Firebird, Azure SQL, and Elasticsearch. I have deep experience in building scalable Cloud solutions using API Gateways, Docker/Kubernetes (AKS, GKS, EKS), REST, GraphQL, CI/CD, and Microservices (with RabbitMQ and Kafka). Being good at web development, I can build frontend apps using React, Angular and Vue frameworks for your MVP. I have previously built scalable systems and MVPs in various industries. For example: I'll help you create a list of cloud projects from your portfolio, organized by cloud provider. I'll analyze the project summaries and categorize them based on the cloud technologies mentioned. AWS Projects: 1. Small World Financial Services - Banking domain - Technologies: AWS, SpringBoot, Java - Focus: International money transfer systems 2. TradeSun - Banking domain - Technologies: AWS Lambda, NodeJS, Angular, Serverless, DynamoDB - Focus: AI-powered trade document checking system for JPMorgan 3. CrazyDeals.com - E-commerce domain - Technologies: AWS, Magento, Redis, MySQL - Focus: Online shopping platform optimization 4. Al Jazeera Media Network - Media domain - Technologies: AWS, SASS, JSP, NodeJS, Ruby - Focus: Content management system for news production 5. Pop Social - Social Media domain - Technologies: React Native, SpringBoot, GO, AWS - Focus: Social media platform with Web3 integration 6. ApexChat - Communication domain - Technologies: Socket.io, AWS Fargate, SQS, SNS, NodeJs - Focus: Customer service chat system 7. TaskQue.com - Project Management domain - Technologies: PHP Lumen/Yii, AWS, AngularJS2, MongoDB - Focus: Project management tool 8. Smart Gun Cover System - IoT domain - Technologies: AWS IoT, AWS SNS, Python TensorFlow - Focus: AI-powered firearm monitoring system 9. AARP MoneyMap - Analytics domain - Technologies: React, Apollo, GraphQL, Google Analytics, Aurora - Focus: User behavior analytics platform for financial planning Azure Projects: 1. iPrice Group - E-commerce domain - Technologies: Azure, PowerBI, Python, Cassandra - Focus: Price comparison data system 2. GET Consulting - ERP domain - Technologies: Azure Functions, Cosmos, Service Bus, Redis, Angular - Focus: Cloud-based business management system GCP Projects: 1. SCEAI Qatari Economics Portal - Public sector, analytics domain - Technologies: GCP OpenAI, Pinecone, Web API - Focus: RAG/AI-powered data analytics and question answering system I believe I can build nice Cloud solutions for you. I am looking forward to working with you. Warm Regards, Rafey Full-Stack Cloud Engineer | Azure | AWS | GCP

💪𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐝 DevOprs 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 𝐰𝐢𝐭𝐡 12+ Years 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 Hi! 👋 I'm a seasoned DevOps engineer specializing in CI/CD automation, cloud infrastructure management, and continuous integration/deployment. My goal is to streamline development workflows, enhance system reliability, and ensure fast, smooth deployments in modern cloud environments. ✅ Automation & Scripting: Crafting efficient automation scripts with Ansible, Bash, Python, and other DevOps tools. ✅ CI/CD & Deployment: Expertise in CI/CD pipelines, automated deployments, and containerization with Docker, Kubernetes (AWS EKS, GKE, AKS, etc.), and cloud services. ✅ Infrastructure as Code (IaC): Implementing Infrastructure as Code using Terraform, CloudFormation, Docker, and Kubernetes clusters for scalable environments. ✅ Cloud Expertise: Proficient with AWS, Azure, Google Cloud Platform (GCP), DigitalOcean, and other cloud computing platforms, ensuring optimal resource usage and cost-efficiency. ✅ Monitoring & Troubleshooting: Implementing system monitoring, alerting, and troubleshooting solutions using Prometheus, Grafana, Zabbix, and other DevOps monitoring tools to ensure system health and minimize downtime. Why Choose Me? ✅ Proven Experience as DevOps: Over a decade of hands-on experience across various industries and DevOps projects. ✅ Automation-First Approach: I focus on automating repetitive tasks and optimizing development workflows, freeing teams to innovate and accelerate delivery. ✅ Problem-Solving Mindset: Passionate about solving complex problems and implementing effective DevOps solutions. ✅ Cutting-Edge Practices: Staying updated with microservices architecture, containerization technologies like Docker and Kubernetes,A WS cloud-native practices, and the latest DevOps tools and trends. ☺️ ꜰᴇᴇᴅʙᴀᴄᴋ ᴏꜰ ᴛʜᴇ ꜱᴡɪᴍ ᴛʀᴀᴄᴋɪɴɢ ᴘʟᴀᴛꜰᴏʀᴍ: 💯 ɪᴍᴘʟᴇᴍᴇɴᴛɪɴɢ ʀᴏʙᴜꜱᴛ ᴅᴇᴠᴏᴘꜱ ᴘɪᴘᴇʟɪɴᴇꜱ ɪɴᴄʀᴇᴀꜱᴇᴅ ᴏᴜʀ ᴅᴇᴘʟᴏʏᴍᴇɴᴛ ꜰʀᴇǫᴜᴇɴᴄʏ ʙʏ 𝟦𝟢%, ᴀʟʟᴏᴡɪɴɢ ᴜꜱ ᴛᴏ ʀᴇʟᴇᴀꜱᴇ ᴜᴘᴅᴀᴛᴇꜱ ᴀɴᴅ ɴᴇᴡ ꜰᴇᴀᴛᴜʀᴇꜱ ᴍᴏʀᴇ ʀᴀᴘɪᴅʟʏ. ᴛʜᴇ ᴄᴏɴᴛɪɴᴜᴏᴜꜱ ɪɴᴛᴇɢʀᴀᴛɪᴏɴ ꜱᴇᴛᴜᴘ ᴀʟꜱᴏ ʀᴇᴅᴜᴄᴇᴅ ᴅᴇᴘʟᴏʏᴍᴇɴᴛ-ʀᴇʟᴀᴛᴇᴅ ᴇʀʀᴏʀꜱ ʙʏ 𝟤𝟧%. Let’s collaborate to enhance your DevOps pipelines, optimize your cloud infrastructure, and improve your system reliability! 🔑 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬 𝐭𝐨 𝐟𝐢𝐧𝐝 𝐦𝐞: DevOps Engineer, AWS Developer, Kubernetes, Docker, CI/CD, GCP, DevOps, AWS, Amazon Cloud, GCP, Google Cloud Platform, Digital Ocean, Alibaba Cloud, Azure, Docker, Kubernetes, Docker Swarm, ECS, Elastic Container Service, CI/CD, Nginx, Apache2, Prometheus, Grafana, Alertmanager, AWS CloudWatch, NewRelic, Zabbix, Gitlab, Gitlab CI, Github, Bitbucket, Jenkins, Groovy, Bash, Python, Ansible, Linux Operating Systems (CentOS, Ubuntu, Debian, Fedora), Linux Administration, Infrastructure, Web Server, Networking, OpenShift, Monitoring, Logging

I've nearly 14 Years of experience with Small, Medium & Enterprise companies Implementing and Managing various IT Solution. I have good Expertise on Cloud IaaS & PaaS Solutions, Linux & Windows System Administration, DevOps Engineering. I have been involved in wide range of projects concerning the Planning, R&D, Execution and Maintenance. Since last 5 years as Freelancer/Consultant I have delivered many project on DevOps, GCP, Azure, AWS Clouds, linux & Windows server, Automation, CI/CD Pipeline with Jenkins, Azure DevOps Pipeline, TeamCity, Bitbucket Pipeline on various Technologies like; .Net, .Net Core, Java, Nodejs, Dockerization, Docker Orchestration with Kubernetes, Swarm, ECS, EKS, AKS, Azure container Instance, GPU Containers & VM, Automation with Ansible, Terraform, Chef, Azure Automation -Run Book, CloudFormation Template, Serverless technologies, SQL, no-SQL and many more. Learning, Troubleshooting, Understanding Technical Details are my core competencies. Key Skill Stack: - Certificate - CCNA | SCSA | MCSE DevOps – Docker | Jenkins | CI/CD Pipeline | Ansible | Chef | Puppet | Packer | Terraform | RabbitMQ | Redis | Jira | SCM | Circal CI | TeamCity | Kubernetes Monitoring - Zabbix | Nagios | ELK | Icinga | Solarwind | New Relic Operating Systems - Linux | Microsoft Windows | Unix/Solaris | Mac Firewalls / UTM – Iptables | Packetfence | Endian | Utangle | Pfsense | FortiGate | Juniper | Sophos | Barracuda | SonicWall Web Servers - Apache | IIS | Nodejs Messaging/Communication – Lync for business | Smartermail | Exim | Postfix | Sendmail | Google App | O365 | MS Exchange | Zimbra | Asterisk | MailEnable Control Panels - Plesk | cPanel | Helm | Websitepanel Other Technologies – ADFS | OpenVPN | OpenDNS | OpenSSL | SSRS | Crystal Report | TFS | SVN | GIT | Dynamic DNS | MS System Centre (CM, OM, VMM, DPM) | Jetro Cockpit | 2X | PowerShell | Wordpress | Google Site | JIRA | DRUPAL | ZOHO Site | Office 365 | Red5 | FFMPEG | Wowza | MFT IaaS/PaaS – Azure | AWS | Google Cloud | OpenStack | Alibaba Cloud Virtualization – Vmware | Hyper-V | Xen | KVM | OpenVZ Networks - TCP/IP, SSL/IPSEC VPN, VLAN, IPv6(6to4 Tunnel), MPLS, PRI, DHCP, DNS, IDS, IPS, DLP, NFS, ISCSI, CIFS, SMB 3.0, NLB, NAS, SAN Database - MySQL | MS SQL | Oracle

🏆 Upwork Top Rated Plus Developer 🏆 6+ years of experience in Java, Spring Boot, Kotlin, Python, Android 🏆 14,000+ Hours in Hourly Projects and more in Fixed Cost Projects 🏆 30+ Enterprise web applications deployed on cloud services 🏆 100+ Small POC applications delivered 🏆 100% Client Satisfaction & consistent best-quality delivery 🏆 Worked in FinTech, E-commerce, CRM, Cloud Integration, ETL, and Web API Integration 🏆 Self-motivated, detailed-oriented, punctual, and a fast learner 🏆 Strong troubleshooting/debugging skills 🏆 Help turn idea/concept into reality My expertise includes the following: ✔ Java Language and Frameworks: Java, Spring Boot, Spring Framework, JPA, Hibernate, Kotlin, Maven, Jetty ✔ Other Languages and Frameworks: JavaScript, Node, TypeScript, Python, Go ✔ Android SDK, React, Flutter, BT LE device integration, performance improvement ✔ SQL, NoSQL Databases: PostgreSQL, MySQL, Oracle, MongoDB, Redis ✔ IOT, AR/VR, Machine Learning ✔ REST API, GraphQL, Web Service, XML, JSON, HTML5, Reactjs, Bootstrap ✔ Cloud services like AWS, Google Cloud Platform, Azure, Heroku, Firebase ✔ Social Media Integration like Facebook, Twitter, and Linkedin ✔ Payment Gateway Stripe, Braintree, Paypal, Autorize.Net, Square ✔ Familiar with Asana, Basecamp, Git, SVN, Jira, Trello, Slack

✅ ✅ ✅ TOP-RATED PLUS Cloud Engineering & CTO Consulting! As an accomplished CTO consultant, my specialization in Cloud DevOps Engineering spans an impressive 12 years. I've successfully designed, implemented, and maintained cloud-based infrastructure and systems, harnessing the latest technologies and best practices in Cloud DevOps. My expertise includes AWS, Azure, and Google Cloud, with a deep understanding of optimizing and securing these environments. Beyond this technical wizardry, I offer a business-oriented mindset honed from successfully operating my own startup in 2012. Be it budget management, team leadership, creative ideation, or company growth, I have the right business acumen to propel your company forward. If you need assistance with cloud migration, infrastructure scaling, or deployment pipeline automation, I have the expertise and experience to guide you to your goals. 🌟 Why am I unique amongst other freelancers? 🌟 I prioritize "QUALITY of Work", always striving for client success and satisfaction. A brief 10-minute conversation is all it takes for me to grasp your business needs. Your privacy matters, hence my readiness to sign an NDA to protect your business. I'm passionate about my work, balancing speed and quality in every task I undertake. My expansive skill set includes: Mastery in cPanel / WHM. ● Expertise with cloud providers such as AWS, Google Cloud, Alibaba Cloud, Digital Ocean, etc. ● Specialization in managing application cloud platforms like OpenStack, OpenShift. ● Proficiency in Linux distributions (RedHat, CentOS, Ubuntu, Debian). ● Expertise in computer clustering, data replication, and disaster recovery. ● Skill in containerization orchestration (Docker and Kubernetes). ● Mastery in monitoring solutions such as ElasticSearch, Kibana, Zabbix, Nagios, NewRelic, etc. ● Familiarity with DevOps automation tools such as Ansible, Chef, Puppet, Terraform, Jenkins. ● Experience working closely with developers to design CI/CD pipelines. ● Expertise in CMS & eCommerce platforms (WordPress, Drupal, Magento, Shopify, PrestaShop). ● Proficiency in email migration to GSuite, Office365. ● Proficiency in implementing HIPAA compliance in your infrastructure. I'm excited to discuss your unique needs and explore how I can be of service. Let's chat!

I have a degree from IIT Kharagpur (Masters in Computer Science and Bachelors in Mathematics). I have over 10 years of professional experience in Open Source Web Development, Programming and everything Linux. I know when I need to sit in front of my computer and program until the early hours of the morning. I am specialized in writing API's. My API's are currently being used by the German Medical Institutes.

I’m a world-class engineer with expertise in creating products used by enterprises, consumers, defense agencies, and governments. I’ve got deep expertise in every major technology stack from top to bottom, frontend to backend, OS to hardware. I’ve lead development on systems that deliver hundreds of billions of requests monthly, and have managed teams with 40-50+ direct reports across various functions. I'll work with you to first understand your problem in-depth, lay out a roadmap to completion, and start executing with regular updates so you're completely on the same page. You'll have constant confidence that your project is in the right direction. I work on a large range of technologies, including but not limited to: - Languages: Nodejs, TypeScript, Golang, JavaScript, C, C++, HTML, CSS, SCSS, Python, Java, Kotlin, PHP, Ruby, C#, Perl, Erlang, Zig, Swift, Rust - Frameworks / Platforms: Android, iOS, Django, Laravel, Ruby on Rails, .NET, Angular, React - Databases: PostgreSQL, MySQL, Redis, Elasticsearch, Clickhouse, RabbitMQ, ScyllaDB - Operations: Kubernetes, Docker, Ansible, HAProxy, Nginx, Terraform, Consul, Prometheus, Grafana - Protocols: TCP/IP, HTTP, gRPC, Protocol Buffers, SMTP, IMAP - Clouds: AWS, GCP, Azure, OpenStack