Career Highlight
• Senior Solutions Architect & Oracle Consultant with 20+ years of expertise in Cloud Transformation, OCI, and Oracle Products.
• Accomplished IT Strategist driving large-scale infrastructure transformations across the Telecom, Banking, Commercial and Government sectors.
• Expert in bridging the gap between business objectives and technical execution, specializing in Oracle Cloud Infrastructure (OCI), Exadata, and Hybrid Cloud architectures.
• Proven track record of leading complex pre-sales cycles, from RFI/RFP responses to proof-of-concept (POC) delivery and executing mission-critical database migrations that optimize operational costs and enhance efficiency.
• Certified OCI Architect with deep expertise in managing vendor relationships and delivering high-value solutions for top-tier enterprise clients.
Core Competencies:
• Cloud Platforms: OCI Architecture, Cloud Migrations, Exadata, ExaCC, OCVS, ZDLRA, Hybrid Disaster Recovery Solutions, Multi-Cloud Strategy (AWS & Azure).
• Strategic Pre-Sales: RFI/RFP Management, Solution Design, TCO Analysis, Customer Workshops.
• Services: Solution Architecture, IT Infrastructure & Cloud Managed Services, Technical Account Management and Disaster Recovery.
• Database Management: Oracle Database Migration, Performance Tuning, Backup & Recovery, MySQL, MongoDB.
• Sectors: Telecommunications, Banking/Finance, Government, Commercial.
Professional Certificates & Badges:
• Oracle Cloud Infrastructure Certified Architect Associate.
• Oracle Cloud Infrastructure Migration Architect Professional.
• Oracle Cloud Database Migration and Integration Professional.
• Oracle Cloud Infrastructure Multicloud Architect Professional.
• Microsoft Certified: Azure Fundamentals.
• AWS Certified Solutions Architect Associate
• Oracle Exadata On-Premise Solutions Engineer Specialist
• Oracle Exadata On-Premise Sales Specialist
• Oracle Recovery Appliance (ZDLRA) Solution Engineer Specialist
• MySQL Solutions Engineer Specialist.
• ITIL® Foundation
Oracle Performance Tuning
MySQL
MongoDB
Oracle PLSQL
Oracle Data Guard
Oracle RAC
Oracle Application Server
Oracle Database Administration
Amazon Web Services
Oracle Cloud
Solution Architecture
Cloud Migration
Zeeshan A.
Muscat, Oman
$20/hr
4.5
41 jobs
16+ years delivering scalable solutions across Oracle (certified), PostgreSQL, MySQL, SQL Server, MS Access, and more. Trusted by long-term clients for reliable, high-quality work.
Expertise:
• PL/SQL, tuning, optimisation, migrations (Oracle + multi-DB)
• Advanced Sql queries, procedures and functions development
• ETL/ELT pipelines, Python automation
• Odoo customization, modules, APIs
• Data analytics and processing
• Data cleaning and converting to other forms like csv, sql , json etc
• Make custom CRUD applications
• Biometric sync (ZKTeco/BioTime → Odoo HR/Payroll)
• Oracle Forms & Reports development/maintenance; PHPRunner rapid web apps; desktop DB (MS Access, LibreOffice Base)
• Legacy Oracle: Install & configure Forms 6i on Windows 11 (unsupported workaround)
Results: Zero-touch payroll for 500+ users; 70%+ faster queries.
Available for short and long-term partnerships. Message me to discuss your project!
Oracle Database
SQL
Database Administration
Microsoft Access
MySQL
Oracle PLSQL
Xlinesoft PHPRunner
Oracle Forms
Database Programming
Stored Procedure Development
SQL Programming
Data Analysis
Data Migration
Data Cleaning
Looker Studio
Henry N.
Hanoi, Vietnam
$39/hr
4.9
69 jobs
I am a seasoned Database Administrator with 20+ years of experience managing, tuning, and troubleshooting mission-critical databases across Oracle, SQL Server, PostgreSQL, MySQL, and cloud platforms (AWS, Azure, Google BigQuery). I specialize in performance optimization—identifying issues within minutes and implementing solutions that restore speed, stability, and reliability.
My core strengths include:
Performance Tuning & Troubleshooting: SQL query optimization, indexing, partitioning, memory/I/O tuning, and real-time issue resolution.
Database Administration: Installation, upgrades, backup/recovery, high availability (RAC, Always On, replication), and security hardening.
Data Architecture & Warehousing: Designing scalable schemas, star models, and ETL pipelines for BI and analytics.
Business Intelligence Integration: Power BI, Tableau, SAP BO, and advanced reporting solutions.
I deliver robust, secure, and high-performing database environments that empower organizations to scale confidently and make data-driven decisions. Whether on-premises or in the cloud, I ensure your systems run at peak efficiency with minimal downtime.
Oracle Performance Tuning
Performance Optimization
Oracle Database
Database Optimization
Database Design
PostgreSQL
MySQL
Database Modeling
Database Architecture
Data Analytics
Microsoft Power BI
Oracle Database Administration
Microsoft SQL Server Administration
Data Extraction
Database Maintenance
Query Tuning
Data Analysis Consultation
Power Query
Data Engineering
Md. Isbat R.
Chittagong, Bangladesh
$30/hr
5.0
22 jobs
🏆 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 - Delivering nearly a 𝗱𝗲𝗰𝗮𝗱𝗲 𝗼𝗳 𝗢𝗿𝗮𝗰𝗹𝗲 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 and 𝗼𝘃𝗲𝗿 𝟭𝟱+ 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗰𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 across the 𝗢𝗿𝗮𝗰𝗹𝗲 𝘁𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆 𝘀𝘁𝗮𝗰𝗸 - covering development, integration, implementation, consulting, and AI-driven enterprise automation for mission-critical systems.
Whether you're modernizing Oracle ERP, building enterprise web applications, integrating third-party systems, or creating AI assistants that interact securely with your data, I deliver scalable, secure, and production-ready solutions.
📊 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱
• Performed process discovery, feasibility analysis, and solution design for automation candidates across multiple business functions.
• Architected AI agent development and automation workflows using n8n and custom bots.
• Integrated global CRM platforms (including NetSuite, Salesforce, and Creatio).
• Designed and delivered end-to-end EBS to POS integrations for NIKE, ADIDAS, LEVI'S, and PUMA retail operations in Bangladesh (Oracle EBS R12.2.x).
• Built and deployed RPA solutions in UiPath Studio + Orchestrator, improving process automation by 40%
• Core team member on an Oracle Fusion Cloud Supply Planning implementation.
• Developed multiple customized systems across government and enterprise clients.
• Delivered inbound/outbound integrations across EBS and Fusion Cloud using OIC, VBCS, FBDI, and BI Publisher.
• Completed multiple end-to-end data migration projects.
• Top Rated with a 100% Job Success Score on Upwork.
🏢 𝗖𝗼𝗿𝗲 𝗔𝗿𝗲𝗮𝘀 𝗼𝗳 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲
• 𝗢𝗿𝗮𝗰𝗹𝗲 𝗙𝘂𝘀𝗶𝗼𝗻 𝗖𝗹𝗼𝘂𝗱 𝗣𝗮𝗮𝗦 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: OIC, Fusion Cloud APIs, VBCS, PCS, FBDI, HDL, BI Publisher, OTBI
• 𝗥𝗣𝗔 & 𝗔𝗜 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: UiPath Studio, UiPath Orchestrator, Process Discovery, n8n AI automation
• 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Oracle APEX, Oracle ADF, OAF, Oracle Forms/Reports 6i–12c, PHP, Laravel
• 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 & 𝗪𝗲𝗯 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: REST/SOAP APIs, Web Services, Microservices, ORDS, Oracle SOA Suite
• 𝗜𝗻𝘁𝗲𝗿𝗳𝗮𝗰𝗲𝘀 & 𝗖𝗼𝗻𝘃𝗲𝗿𝘀𝗶𝗼𝗻𝘀: Standard APIs, Open Interface tables, data conversions, WebADI
• 𝗢𝗿𝗮𝗰𝗹𝗲 𝗘-𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗦𝘂𝗶𝘁𝗲 (𝗘𝗕𝗦 𝗥𝟭𝟮.𝟮.𝘅): Purchasing, iProcurement, iSupplier, Sourcing, Inventory, Landed Cost Management (LCM), Order Management, Advanced Pricing, AP, AR; P2P and O2C cycles; RICEW development (Reports, Interfaces, Conversions, Extensions, Workflows)
• 𝗢𝗿𝗮𝗰𝗹𝗲 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗖𝗹𝗼𝘂𝗱 (𝗢𝗜𝗖): real-time and event-driven integrations, ORDS, inbound/outbound interfaces, middleware
• 𝗣𝗟/𝗦𝗤𝗟 & 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲: SQL, PL/SQL, Oracle Database 10g–19c, BI/XML Publisher, Oracle Workflow, WebLogic Server administration
📋 𝗠𝘆 𝗘𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀
Every architecture is unique. My approach centers on deep technical assessment, clear risk identification, and structured remediation:
▪️Discovery & Architecture Audit: Map out dependencies, evaluate configuration drifts, and identify security or compliance gaps.
▪️Strategic Blueprinting: Deliver a pragmatic roadmap aligning technical execution with regulatory and operational requirements.
▪️Execution with Zero Disruption: Implement, migrate, or harden the stack using proven change-management strategies to maintain business continuity.
▪️Documentation & Knowledge Transfer: Provide clear, audit-ready SOPs and technical documentation so your internal teams can maintain operations cleanly.
✉️ 𝗟𝗲𝘁'𝘀 𝗧𝗮𝗹𝗸
If you are looking to modernize Oracle systems, integrate fragmented platforms, or build a scalable enterprise application ecosystem, I can help you design and deliver it end-to-end.
Click the “𝗜𝗻𝘃𝗶𝘁𝗲” or “𝗠𝗲𝘀𝘀𝗮𝗴𝗲” button. Please include a brief summary about the current systems you need assistance with. If you have new ideas or projects, it helps to have a short summary of what the system or process needs to do.
Oracle Programming
Oracle Database
Oracle Cloud
Oracle APEX
Oracle E-Business Suite
Oracle PLSQL
Oracle Integration Cloud Service
API Integration
Oracle Fusion Applications
Oracle NetSuite
NetSuite Development
Enterprise Resource Planning
Solution Architecture
Software Architecture & Design
Data Migration
ETL Pipeline
Artificial Intelligence
Data Extraction
n8n
Enterprise Software
Rongping S.
Chengdu, China
$60/hr
5.0
171 jobs
✅ I am a Top Rated Plus Database Consultant on Upwork with over 100 5-star client reviews, backed by 13+ years of enterprise experience and a 100% commitment to your success.
Instead of just keeping the lights on, I solve complex customer-facing database bottlenecks, architect zero-downtime migrations, and make massive performance improvements for mission-critical systems. My career spans managing over 8,000 production databases and 500TB+ of data for fast-growing SaaS platforms, FinTech companies, and global enterprise organizations.
⭐ Here's what I can bring to your project (Validated by vendors and trusted by hundreds of clients):
✅ Deep Multi-Engine Expertise: Mastery across PostgreSQL, MySQL, SQL Server, MongoDB, and Oracle.
✅ Cloud Database & RDS Architecture: Extensive hands-on experience migrating, scaling, and optimizing managed database workloads across AWS (RDS/Aurora), Google Cloud (Cloud SQL), and Azure databases.
✅ AI & Vector Database Architecture: Expert in designing scalable schemas for massive AI workloads and tuning vector extensions (e.g., pgvector with HNSW & IVF indexing) for millisecond-latency cosine similarity searches.
✅ Extreme Performance Tuning: Rapidly diagnosing CPU spikes, slow queries, and index inefficiencies to restore lightning-fast performance.
✅ High Availability & DR: Architecting bulletproof clusters (Always On, InnoDB Cluster, Patroni, HADR) to guarantee zero data loss.
✅ Vendor-Certified & Client-Proven: My technical methodologies are not just theoretical—they are backed by premium official certifications from AWS, Oracle, Cisco, PMP, TOGAF, and ITIL, and have successfully empowered hundreds of businesses globally.
✅ Enterprise Security & Compliance: Strict adherence to data security best practices when handling sensitive financial and operational data.
✅ 24/7 Ultra-Reliable Communication: You will never be left in the dark; you will always know the exact status of your production systems.
⭐ Why you should choose me over other freelancers:
✅ Broad Vision, Deep Focus: Unlike single-engine DBAs, my multi-platform expertise allows me to choose the absolute best architectural solutions for your specific business needs.
✅ Over-Delivering: This is core to my work ethic. I don't just close tickets; I identify root causes and optimize your infrastructure so the problem never happens again.
✅ Earning Your Trust: My primary goal is not just completing a contract, but becoming the reliable technical partner your business can always count on.
Let's discuss how we can secure, optimize, and scale your data infrastructure. Send me an invite, and let's get to work!
Oracle
PostgreSQL
MySQL
MariaDB
MongoDB
Microsoft SQL Server
SQL
Database Optimization
MySQL Programming
Database Administration
Database Design
Query Tuning
Database Maintenance
Amazon RDS
PostgreSQL Programming
Rizwana B.
Pune, India
$30/hr
5.0
50 jobs
Oracle :
- Having rich experience in Oracle Database Installation, upgrades.
- install and setup high availability e.g. RAC , DG , GG
- Rich experience in migration from one platform to another .\
- Rich experience in migration from on-prem to AWS/Oracle cloud .
- Experience in AWS DMS
- Setup the backup and recovery standards.
- DB and query tunning.
- troubleshoot performance issues
- Automation using shell/batch/python scripting
- debugging users issues .
- Automate repetitive task using python/shell/batch script.
- Having fair hands on automation using Ansible for Oracle DBA repetitive task.
Migration:
===========
- Oracle EE/SE to postgres AWS RDS using AWS SCT & DMS services
- Oracle EE/SE to Oracle Cloud using datapump.
- Oracle EE/SE to MariaDB using Goldengate.
- Migration from one platform to another platform
- Migration from oracle to databriks
Automation:
good in shell scripting , batch , python and ansible.
recently completed oracle grid and rdbms installation automation using Ansible .
Good experience in upgrades and performance tunning. Experience DBA devops and automation expertise.
Postgres :
=======
- Installation, upgrade minor and major
- AWS Auroa RDA - postgres
- troubleshooting
- performance analysis
Replication:
Using golden gate
Shareplex
Debezium log miner and Openlogreplicator
Performance Optimization
Database Administration
Linux
Amazon RDS
Oracle RAC
Oracle Upgrade
Oracle Data Guard
Oracle Database Administration
Cloud Migration
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At A Glance: Oracle Performance Tuning
From Taipei to Silicon Valley, technology is the core around which the modern workplace revolves. Computers in all of their multitudinous permutations are essential tools for every business owner and employee alike. Thus, it is essential for these devices and their respective software systems to maintain a high level of performance at all times. Oracle was second only to Microsoft in 2011 in terms of revenue for software makers, and Oracle’s computer hardware systems and enterprise software products are widely used and trusted by professionals the world over. In particular, Oracle database management systems have proven to be a boon to many a business. Oracle software also includes customer relationship management (CRM), enterprise resource planning (ERP), and supply chain management (SCM) software.
Whatever Oracle products you or your company utilize, an experienced and qualified Oracle performance tuning expert can ensure you are getting the most out of this highly-valuable software. An Oracle performance tuning professional can help you in an array of tasks, including installing, implementing, updating, and managing software to optimize performance. These experts are experienced in areas such as SQL tuning, backing up and restoring data, writing scripts to automate processes, building heterogeneous systems with other databases, analysis, and much more. Freelancers on Upwork are dedicated professionals who will work with you to meet your needs in a timely fashion and at a competitive rate. Whether you’re a new Oracle user looking to install your newly-purchased software, or are a seasoned user in need of some troubleshooting expertise, a talented Oracle performance tuning expert can assist you.
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