Slow databases? Production outages? Performance bottlenecks affecting your business? I help organizations identify root causes, optimize database performance, and build reliable database platforms. I am a senior database administrator (DBA) with over 13 years of hands-on experience managing production database systems. I specialize in MySQL, MariaDB, PostgreSQL, SQL Server, MongoDB adn Oracle, providing database troubleshooting, incident response, daily operations and maintenance, performance optimization, and reliable backup, high availability, and disaster recovery solutions for mission-critical environments. 🔍 Database Expertise: With over 13 years as a senior expert in MySQL/MariaDB/Percona/PostgreSQL/MongoDB/Oracle/SQL Server/DuckDB, I’ve managed over 5000 databases and 300 TB+ of data. My experience covers database architecture, performance optimization, backup and recovery, High availability, disaster recovery, and much more. I ensure every database solution I deliver is robust, scalable, high performance, and perfectly aligned with your business needs. 🛠️ Technology Stack: MySQL/Percona (Versions 5-9) MariaDB (Versions 5-12): Installation、High Availability, Replication, and Scalability Solutions、InnoDB Cluster、Group Replication、Workbench/Shell/Router、Backup & Restore、Galera Cluster、Percona XtraDB Cluster、XtraBackup、Toolkit、InnoDB/MyISAM/Binlog、Orchestrator、replication-manager. PostgreSQL (Versions 7-18): Installation、High Availability, Replication, and Scalability Solutions、SQL Tuning、pgpool-II、PostGIS、TimescaleDB、ClickHouse、Patroni、Citus、pgvector、Security、Supabase、Neon. MongoDB (Versions 3-8) / MongoDB Atlas : Installation、MongoDB Shell (mongosh)、Aggregation、Indexes、Atlas、Time Series、Change Streams、Replication、Sharding、Storage、Administration、Security. SQL Server (Versions 6.5 – 2025): Installation、High Availability and Disaster Recovery (Always On AG, FCI, Log Shipping, Replication)、Distributed Availability Groups、SQL Server Management Studio / Azure Data Studio / sqlcmd、Backup & Restore、Failover Cluster / Always On Solutions、PowerShell dbatools / First Responder Kit、Storage Engine / Transaction Log / Change Data Capture. Other Database : Oracle、DB2、Redis、SQLite、DuckDB、DocumentDB Cloud service providers: AWS RDS、AWS Aurora、Amazon DocumentDB、GCP、Azure、N8N creator. Certifications: I hold certifications from Cisco, Oracle, MySQL, AWS, ITIL, PMP, and TOGAF, ensuring I bring industry-recognized expertise to every project. 📈 Why Choose Me? Proven Experience: Worked for leading ICT and IoT solution providers, supporting major operators, banking, and financial enterprises. End-to-End Solutions: From designing high availability architectures to delivering query optimizations and backup solutions, I offer complete database management expertise. Training & Support: I also provide course training for companies looking to empower their teams with database-related skills. 🤝 Let’s Collaborate: If you’re looking for a seasoned database professional to tackle challenges in MySQL, PostgreSQL, MongoDB, Oracle, or other database technologies, let’s discuss how I can help streamline your operations and enhance performance. 📩 Contact Me: I’m ready to dive into your project. Reach out, and let’s unlock the full potential of your data infrastructure together!

Platform & DevOps Architect | Kubernetes, GitOps, HA Databases, Cloud I help companies build reliable production infrastructure and solve critical incidents. My specialties include: * Kubernetes and GitOps platforms * Cloud solutions (AWS/Azure/GCP) * PostgreSQL Patroni and database HA * Active Directory and Windows infrastructure * Disaster Recovery and High Availability * Production troubleshooting and performance optimization With 20+ years of infrastructure experience, I work with startups and enterprises to design, automate and operate business-critical systems. Linux / Platform Engineering: • Production Kubernetes platforms using GitOps (FluxCD, ArgoCD), Helm, and Docker • Web and application stacks: nginx, Apache, PHP, MySQL/MariaDB * DBA: Postresql Patroni, MySQL InnoDB Cluster, Galera Cluster • CI/CD pipelines with GitHub Actions, GitLab CI, Bitbucket Pipelines, and Azure DevOps • Monitoring and observability using Grafana + Prometheus, Zabbix, ELK (+ APM) • Automation and scripting with Bash and Python • Virtualization platforms: VMware, Hyper-V, Xen AWS, GCP, Azure - 10+ years of experience with clouds • Perfect knowledge of SaaS services: EC2, ECR/ECS, VPC, Lambda etc. • Strong architect skills. • aws-cli, cloud, az skills. Windows Infrastructure (20+ years): • Expert in Windows Server 2003–2022, Active Directory, Group Policy, Exchange 2013–2019, and Exchange Online. • Failover Clustering, Network Load Balancing (NLB), MS SQL Server Clusters and AGs. Typical projects: • PostgreSQL Patroni HA clusters • Kubernetes production troubleshooting • ClickHouse migrations and optimization • Active Directory security audits • Hyper-V and VMware infrastructure • Disaster Recovery design and implementation • Performance optimization and incident response

Got unstructured documents that need to become structured, queryable intelligence? I build the end-to-end AI pipelines that make that happen, reliably and at scale. With 5+ years of experience in AI-driven backend systems and knowledge engineering, I specialize in turning messy, real-world data into clean, ontology-aligned knowledge graphs using modern LLMs, graph databases, and cloud infrastructure. Here is what I bring to the table: Knowledge Graph Development — Design and maintenance of production-grade graphs on AWS Neptune and Neo4j, with ontology-driven data modeling and schema refinement as systems evolve LLM Extraction Pipelines — Multi-pass entity, event, and relationship extraction using structured prompting, Pydantic data modeling, and fine-tuned models for improving accuracy over time Batch Document Ingestion — Automated ingestion from public sources using web scraping tools like Crawl4AI, with robust text parsing and normalization for downstream ML tasks AWS AI & ML Infrastructure — Deploying and managing AI workloads on SageMaker and Bedrock with proper observability, versioning, and CI/CD practices Human-in-the-Loop Workflows — Building review cycles that let domain experts validate and correct extractions, feeding improvements back into the model over time Backend APIs & Services — Clean Python backends that expose the knowledge graph as fast, reliable, queryable APIs for downstream applications I have worked on technically deep systems where data quality, pipeline reliability, and schema consistency are not optional. I am comfortable owning a sophisticated backend from ingestion all the way to query layer, without needing constant direction. If you are building a system that turns documents into intelligence, I would love to be the engineer who makes it production-ready. Send me a message and let us get started.

Main expertise: - Linux administration. - Bash scripting. - Web server administration (Apache, Nginx). - Database programming and administration (MySQL, MariaDB, Sqlite, MS SQL, MongoDB, PostgreSql). - Active directory administration (OpenLDAP). - Blockchain administration. - Source version control (Git/GitHub/GitLab/Bitbucket/Bazaar/Launchpad). - Building backend applications using PHP, NodeJS. - CMS installation and configuration - Wordpress, Joomla, Magento, OpenCart, etc. - Shopping cart payment gateway integration. - Website speed optimisation. - SSL certificate installation.

I fix slow or unstable systems — especially the ones others couldn’t — and make them scale properly. I’m Jan — a Fractional CTO with 25+ years of experience turning ideas into production-ready systems. I don’t just advise — I fix and build. I work with startups and growing companies where things are starting to break — or never worked quite right in the first place. Usually when something has already gone wrong — or needs to scale fast. ⚙️What I help with: - Acting as a Fractional CTO when senior direction is missing - Translating business needs into practical technical solutions - Designing scalable architecture and APIs - Fixing performance and stability issues - Optimizing Linux servers and infrastructure - Refactoring legacy PHP into clean, maintainable code 📍Typical situations I come into: - “Business and tech are not on the same page” - “Things get lost between requirements and implementation” - “We’re not sure what the real problem is” - “It works, but it’s slow or unstable” - “We’re scaling and things are breaking” - “The codebase is a mess and nobody wants to touch it” 🧠How I work? Simple solutions. Real performance. No overengineering. I go from architecture down to code, database, OS, and network — whatever it takes to make it work properly. 📩Most of my work is long-term and under NDA, but I’m happy to take a quick look and tell you honestly what’s going on — and how to fix it. 👉 If you’re not sure what’s wrong, I can usually identify it in one call.

Hi My name is Vamsi Krishna and I am a Web developer having 8+ years of experience in building, developing, designing and giving support in Web Development specifically Codeigniter and Laravel projects. I have strong knowledge in Database Management as well.

I bring 17 years of hands-on experience and expertise in managing, optimizing, and automating complex IT infrastructures. My professional journey has spanned diverse technologies, from database administration to DevOps, monitoring tools, and scripting, ensuring that I deliver reliable and efficient solutions tailored to client needs. Key Expertise Areas: 1. Database Administration: • MySQL, MariaDB, and Percona Server for MySQL • Galera Cluster for high availability • Advanced backup and recovery solutions with Xtrabackup • Query optimization, performance tuning, and Orchestrator for MySQL replication management 2. Load Balancing and Proxy Management: • Expertise in ProxySQL and HAProxy for scalable and high-performing systems 3. Containerization & Orchestration: • Proficient in Docker and Kubernetes for deploying and managing applications in scalable, containerized environments 4. System Administration: • Linux and Windows system administration • Automation using tools like CHEF and Ansible for configuration management 5. Monitoring & Alerting Tools: • Skilled in setting up and maintaining Zabbix, Grafana, Icinga, Nagios, Prometheus, and Loki for real-time system monitoring 6. Scripting & Automation: • Bash and Python scripting for task automation, monitoring enhancements, and custom solutions Why Work with Me? • Proven Track Record: Over 17 years of successfully solving complex challenges and delivering impactful results • Versatility: In-depth knowledge across diverse technologies and platforms • Client-Focused: Tailored solutions to meet unique business requirements, with a strong emphasis on reliability and performance If you’re looking for a dependable expert to optimize your databases, manage your systems, or implement scalable DevOps solutions, I’m here to help. Let’s discuss how I can bring value to your project!

12 Years of total IT experience and work with 27 Customer End including 20 Gov. and Private Bank in Bangladesh, 6 other corporate clients. Vast exposure to IT Infrastructure Management space. Domain expertise on Oracle Database, Security, Solaris (UNIX), SPARC and x86 System. Successfully managed multiple projects involving Implementation and Production Support (Oracle Exadata, Oracle RAC, Oracle Data Guard, Linux Cluster, Solaris Cluster, Oracle Database Appliance, Oracle Advance Security, Audit Vault, Thales nShiled, Thales Payshield, Oracle SUN SPARC and x86 System etc.). Having extensive subject matter expertise in IT Operation Management, Strategic Technology & Developing Cost Effective Solutions to meet customer / business requirements.

An experienced MySQL database engineer with a skillset that expands to Django, Python scripting, Ansible, Linux Administration and various web technologies. I have been a Remote DBA, Support Engineer and Consultant for Percona and Pythian database consultancies, which has enabled me to gain a broad view of huge MySQL installations. You will be able to discover various blog posts I have had published on their respective platforms. I am an established speaker at the global MySQL events on topics including High Availability, Backups and Disaster Recovery, Security and Automation.

🏆 Top-Rated Database Architect & Multi-Cloud Specialist with 16+ Years of Experience Delivered 50+ enterprise-scale database and cloud transformation projects across telecom, government, banking, retail, and transport industries, specializing in migrations, HA/DR architectures, and performance tuning for Oracle, PostgreSQL, MySQL, SQL Server, MongoDB, Redis and Apache Cassandra. I am a seasoned Database Architect and Cloud Specialist with over 16 years of experience, delivering high-impact solutions across telecom, government, banking, transport, and retail industries. My expertise spans multi-database ecosystems (Oracle, PostgreSQL, MySQL, SQL Server, MongoDB, Redis) with a strong focus on performance tuning, HA/DR architectures, and enterprise-scale migrations. Beyond databases, I bring deep experience in multi-cloud environments (OCI, AWS, Azure, GCP) and DevOps practices, leveraging Kubernetes, Docker, Ansible, Jenkins, and CI/CD pipelines to design and automate resilient, scalable infrastructures. Over the years, I have led critical modernization projects including Oracle RAC/Data Guard, PostgreSQL Patroni clusters, MySQL InnoDB clusters, SQL Server Always-On, and GoldenGate microservices replication, all aligned with compliance, cost optimization, and business continuity. I specialize in cloud-native architectures, database modernization, and containerized deployments, ensuring secure, high-performing, and future-ready platforms for enterprises across multiple sectors. 🔹 Database Expertise High Availability & DR: Oracle RAC/Data Guard/GoldenGate, PostgreSQL Patroni/repmgr/EFM, MySQL Group Replication/ClusterSet, SQL Server Always-On, MongoDB ReplicaSets & Sharding, Redis Sentinel & Cluster. Performance Tuning: Advanced SQL optimization, query indexing, connection pooling, and OS-level tuning (CPU, memory, I/O, networking). Clickhouse DB optimization and performance tuning. Migrations: End-to-end cross-platform migrations (SQL Server → Postgres/Oracle, MySQL → Snowflake/OCI/Azure, on-prem → multi-cloud). I have hands-on experience designing and implementing Oracle Fusion API integrations using Oracle Integration Cloud (OIC), connecting Fusion Cloud with multiple external systems. My work includes building and optimizing REST and SOAP-based services, handling complex data mappings, and improving integration performance and reliability. I’ve also maintained existing integrations to ensure high availability and seamless data flow while collaborating closely with cross-functional teams to identify needs, streamline workflows, and deliver well-documented, reusable integration solutions. Automation: Backup/recovery orchestration, PITR, monitoring, and administration via shell scripts, Ansible, Jenkins, and IaC. 🔹 Cloud Architecture Certified in OCI, AWS, Azure, GCP, and Alibaba Cloud, with deep experience in hybrid & multi-cloud setups. Skilled in OCI Exadata Cloud@Customer, AWS RDS/Aurora, Azure SQL Database, Databricks, and multi-region failover. Migrated enterprise systems (DB + middleware) to cloud with zero-downtime cutovers and automated DR. 🔹 DevOps & Modern Platforms Proficient with Docker, Kubernetes, and OpenShift for containerized DB + application deployments. Extensive experience in building, optimizing, and maintaining Oracle Integration Cloud (OIC) processes, adapters, and orchestration for enterprise-scale clients. VBCS (Visual Builder Cloud Service): Skilled in designing and developing responsive, low-code applications integrated with Oracle SaaS and PaaS ecosystems. Strong background in CI/CD (Jenkins, GitLab, Ansible, Terraform). Experience securing secrets with Vault, integrating monitoring stacks (Prometheus, Grafana, ELK). 🔹 Odoo & Application Layer Odoo deployment, backend DB optimization, and module customization. Report building & tailoring business workflows for performance and usability. Tomcat, Apache, IBM WebSphere, Oracle WebLogic, and Bitnami stack administration. 🔹 Data & AI Solutions Data Engineering & Warehousing: Azure Data Factory, Databricks, Oracle OBIEE, Snowflake. AI Agent Development: Built agents for self-healing DBs, N8N automation, and natural language querying. Supabase Consultation: Connect Supabase with AI agents to simplify backend management for non-developers. Automate project provisioning, query execution, function creation, and API management. Enable natural language interaction with data, making database operations accessible to entire teams. ✅ Key Certifications: Oracle 19c OCP DBA | PostgreSQL Advanced v11 | MySQL 8.0 OCP | MongoDB Associate DBA | Redis Certified Developer | Microsoft Azure Administrator | OCI 2025 Certified Multicloud Architect | OCI GenAI | Oracle GoldenGate Implementation Specialist | WebLogic 12c OCP | YugabyteDB DBA