Hire the Best Certified Oracle Cloud Developers

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Mohsin A.

Sharjah, United Arab Emirates

$35/hr
4.7
52 jobs

๐Ÿ† 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. ๐Ÿ”น 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 โ†’ Postgres/Oracle, MySQL โ†’ Snowflake/OCI/Azure, on-prem โ†’ 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. Iโ€™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. ๐Ÿ”น 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. ๐Ÿ”น 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). ๐Ÿ”น 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. ๐Ÿ”น 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. โœ… 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

  • Oracle Cloud
  • Oracle Database
  • Oracle GoldenGate
  • Oracle Exadata
  • Oracle Data Guard
  • Oracle NoSQL Database
  • Oracle Patching
  • MySQL
  • MySQL Programming
  • Oracle Data Integrator
  • MariaDB
  • PostgreSQL
  • Oracle E-Business Suite
  • Database Administration
  • Oracle Database Administration
Md. Kamal H.

Dhaka, Bangladesh

$25/hr
4.9
28 jobs

I am Kamal Hossain, an Oracle Certified, Advanced Apex Developer having 16+ years of experience working with dedicated Oracle Apex & 23+ years of experience working with Oracle Forms, Reports, SQL & PL/SQL Technology. As an Oracle Apex blogger since 2009, I have large number of community across the world to share Issues, ideas, solutions and insights into the world of Oracle Apex. I have hands-on experience working with Oracle Apex Technology in the following Areas: โ€ข ChatGPT integration with Oracle Apex โ€ข PeopleSoft API integration with Oracle Apex โ€ข Shopify Ecommerce API integration with Oracle Apex โ€ข Integration Any Web API with Oracle Apex โ€ข Upgrade Oracle Forms & Reports applications to Oracle Apex โ€ข Oracle Apex 24x including all New Functionalities โ€ข Apex Universal theme along with Custom Templates โ€ข Multi select Card template and Custom look & feel โ€ข Responsive Desktop & Mobile User Interface Design โ€ข Oracle Database 8,8i,9i,10g,11g,12c,18c,19c,23c โ€ข PL/SQL Programming (Advanced Level) โ€ข Application Server - WebLogic, Apache โ€ข Restful services โ€ข Web Services โ€ข Multilingual Apex (Run-time Translating Page) โ€ข AJAX, JQUERY, Javascript, HTML, CSS (Advanced Level) โ€ข JSON Data Processing in Apex (Advanced Level) โ€ข GraphQL Query Processing by Calling REST API (Advanced) โ€ข API Data Integration in Apex (Advanced Level) โ€ข Landing Shopify online order notification to custom DB table โ€ข JQUERY UI Autocomplete applying API Data source โ€ข Interactive Dashboard, Charts & Graphs (Advanced Level) โ€ข Digital Signature Pad in Apex Page โ€ข Custom Multi Functional Calendar Control โ€ข Plugins โ€ข FOEX Plugin Framework โ€ข Implementing Oracle Cloud security with Local Oracle Apex โ€ข BI Publisher & Reporting โ€ข Jasper Reports (Advanced Level) โ€ข PDF Reports โ€ข AOP (Apex Office Print) โ€ข convert SQL Query output to pdf file using pl/sql โ€ข Oracle Multimedia Image Processing in Apex โ€ข Classic Report, Interactive Report & Interactive Grid โ€ข Custom Classic Report โ€ข HTML Report โ€ข Data Export & Import Utility โ€ข Oracle Apex Collections, Dynamic Action (Advanced Level) โ€ข Custom User Login Management โ€ข Custom & Dynamic Master Menu Management โ€ข Custom & Dynamic Top Navigation Bar Management โ€ข Multi application managed through central login policy โ€ข Integrating multiple Applications. โ€ข Email Notification โ€ข SMS Notification My skills also encompass: โ€ข Source control management including version controlling (Utilized Tortoise SVN Server as a tool) โ€ข Product Development โ€ข Team Management โ€ข Release Engineering โ€ข Software Configuration Management I have served last 15 years in the leading Software development companies where I have been repeatedly recognized for development software application from initial requirement gathering to design, coding, testing, documentation and implementation. As a full time Freelancer, I am available 40 hours per week at any time zone standard for long term relationship basis. Thank You M Kamal Hossain

  • AJAX
  • JavaScript
  • jQuery
  • CSS
  • HTML5
  • Web Service
  • Oracle APEX
  • RESTful API
  • Database Programming
Md Budrul Hasan B.

Dhaka, Bangladesh

$25/hr
5.0
16 jobs

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.

  • Oracle Database
  • Oracle Performance Tuning
  • Oracle Data Guard
  • MariaDB
  • MySQL
  • Microsoft SQL Server Administration
  • Solaris Administration
  • Oracle GoldenGate
  • Oracle RAC
  • Oracle Exadata
  • Data Engineering
  • PostgreSQL
  • Oracle WebLogic Server
  • Database Administration
  • Oracle Database Administration
Muhammad I.

Lahore Cantt, Pakistan

$20/hr
4.7
60 jobs

I am an experienced Java, Oracle & SQL Developer with 14+ years of professional experience and 38+ successfully completed projects, specializing in building reliable, scalable, and high-performance backend and database solutions. Java & Spring Boot application development | REST API development and integration Oracle Database, SQL & PL/SQL| Database schema design and optimization Query and database performance tuning Database migrations and upgrades Complex SQL and PL/SQL development Backend architecture and enterprise applications API integration and troubleshooting Database performance optimization I work closely with clients to understand their goals, communicate clearly throughout the project, and deliver reliable, high-quality results that improve performance, efficiency, and long-term business value. ๐Ÿš€ What I Can Help You With ๐Ÿ”น Oracle Database Oracle 11g, 12c, 19c Database development, troubleshooting & optimization Production database support ๐Ÿ”น SQL & PL/SQL Complex SQL query development & optimization Stored Procedures, Functions, Packages & Triggers PL/SQL development and troubleshooting ๐Ÿ”น Database Performance Tuning SQL & Query Optimization Execution plan analysis Identifying and resolving database bottlenecks Improving application & database performance ๐Ÿ”น Oracle Migration & Upgrades Oracle database migration & upgrade planning Pre-upgrade assessment & compatibility checks Migration execution & validation Post-migration troubleshooting and performance optimization ๐Ÿ”น Java & Backend Development Core Java Spring Boot & Spring MVC REST APIs Enterprise backend development Javaโ€“Oracle database integration ๐Ÿ’ผ Industry Experience I have extensive experience working with Banking, Financial Services, and Capital Markets, supporting mission-critical and performance-sensitive applications. My focus is simple: understand your technical challenge, solve the root cause, and deliver a reliable, scalable, and high-performance solution.

  • Oracle Database
  • Spring Boot
  • Spring MVC
  • Back-End Development
  • RESTful API
  • Apache Tomcat
  • SQL
  • Microservice
  • Java
  • Web Development
  • Desktop Application
  • Android
  • ASP.NET
  • Database Design
  • Oracle PLSQL
  • Data Migration
  • Data Analytics & Visualization Software
  • Database Optimization
  • Database Maintenance
  • Database Development
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: โ€ข PL/SQL, tuning, optimisation, migrations (Oracle + multi-DB) โ€ข Advanced Sql queries, procedures and functions development โ€ข ETL/ELT pipelines, Python automation โ€ข Odoo customization, modules, APIs โ€ข Data analytics and processing โ€ข Data cleaning and converting to other forms like csv, sql , json etc โ€ข Make custom CRUD applications โ€ข Biometric sync (ZKTeco/BioTime โ†’ Odoo HR/Payroll) โ€ข Oracle Forms & Reports development/maintenance; PHPRunner rapid web apps; desktop DB (MS Access, LibreOffice Base) โ€ข 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
Datta G.

Pune, India

$56/hr
5.0
5 jobs

I am Oracle Integration Cloud (OIC) Certified Integration Specialist with strong hands-on experience in OIC-based integrations with analysis, architecture, design, build and Hypercare support expertise. I am often invited to interface business requirement discussions to assess technical feasibility. If there are grey areas, I perform small proof of concepts to test solution viability. I have integrated various boundary systems with Oracle Fusion Cloud ERP modules involving Business Event, FBDI, Rest, Soap, ERP adapters, File, Database (PL/SQL), BIP (BI Publisher) extract based patterns. OIC Experience: 8+ years Total IT Experience: 21+ years Skills: 1. Strong hands-on experience in OIC (Oracle Integration Cloud) 2. Oracle PL SQL, Packages, Procedures 3. BI publisher, BICC 4. Rest API and Soap webservice based integrations 5. Created integrations for Oracle Fusion Cloud modules like SCM, Projects, Contracts, AP, AR, CMK, GL etc 6. XML, JSON, XSLT 7. Java, Python

  • Oracle Cloud
  • Oracle Integration Cloud Service
  • Oracle Fusion Applications

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What does a Certified Oracle cloud developer do?

A certified oracle cloud developer builds and deploys cloud-native applications specifically on Oracle Cloud Infrastructure. This role moves beyond basic database management to architect distributed systems that leverage OCI services for scalability and performance. The developer writes code that integrates directly with platform tools, creating serverless functions or containerized microservices that run within the Oracle ecosystem. They manage the full lifecycle of these applications, from initial design through testing and final deployment, while maintaining strict security standards.

  • The developer designs and architects cloud-native applications by applying distributed computing concepts to OCI services. This work involves selecting the right infrastructure components to support high availability and fault tolerance. The developer creates technical blueprints that define how application modules interact with storage, networking, and compute resources. These designs serve as the foundation for building scalable solutions that meet specific business requirements without relying on legacy on-premise structures.
  • The developer implements serverless applications using Oracle Functions and builds microservices for the Oracle Kubernetes Engine. This process requires writing clean, efficient code that executes in response to events or handles complex service-to-service communication. The developer packages these components into containers and configures them for deployment on OKE clusters. They ensure that each microservice operates independently while contributing to the overall functionality of the larger application system.
  • The developer integrates application components with OCI services by using OCI APIs, SDKs, and the command-line interface. This integration allows the custom code to interact seamlessly with managed databases, object storage, and other platform features. The developer writes scripts and functions that call these interfaces to retrieve data, trigger workflows, or update system states. They verify that these connections remain stable and performant under varying load conditions during the development and testing phases.
  • The developer applies security practices for cloud-native apps by configuring identity and access management policies. This task involves defining roles and permissions that restrict access to sensitive resources and data. The developer manages secrets and configuration settings to prevent exposure of credentials in the codebase. They audit these security controls regularly to ensure compliance with organizational standards and protect the application from unauthorized access or potential threats.
  • The developer tests and operates cloud-native applications across development, testing, and production environments. This responsibility includes setting up monitoring tools to track application performance and detect errors in real time. The developer analyzes observability data to identify bottlenecks and optimize resource usage. They configure alerting mechanisms to notify the team of critical issues, ensuring rapid response and minimal downtime for end users relying on the deployed services.

How to hire a Certified Oracle cloud developer on Upwork

Step 1: Post a job

Define your need for OCI-native application development and let the Job Post Generator powered by Umaโ„ข, Upwork's Mindful AI draft the description. Describe your requirements in a few sentences, and Uma constructs a targeted post that highlights serverless and microservices expertise. You can write a new post, update a saved draft, or reuse an existing post to start receiving proposals.

  • Specify whether the work involves building serverless applications with Oracle Functions or deploying microservices on Oracle Kubernetes Engine.
  • List required proficiency with OCI APIs, SDKs, and the command-line interface for integrating application components with cloud services.
  • Clarify if the role includes securing runtime environments using identity and access management policies and secret configuration tools.

Step 2: Evaluate candidates

Review portfolios for evidence of cloud-native architecture and operational monitoring across development, testing, and production stages. Uma runs instant video interviews and builds shortlists with side-by-side comparisons to help you assess technical fit quickly.

  • Look for documented examples of distributed computing designs that leverage specific Oracle Cloud Infrastructure services.
  • Check for code samples or case studies showing integration of application logic with OCI databases and storage solutions.
  • Verify experience setting up observability dashboards and alerting systems to track application performance and health.

Step 3: Interview your top choices

Discuss their approach to testing cloud-native apps and managing deployments in multi-environment setups. Schedule and conduct interviews within Upwork Messages, which generates an immediate transcript and summary after each session.

  • Ask how they handle state management and data persistence when developing stateless serverless functions.
  • Request details on their process for automating security checks and identity verification within the deployment pipeline.
  • Explore their strategy for debugging live microservices using OCI monitoring tools without disrupting user traffic.

Step 4: Agree on scope and begin work

Set clear milestones for delivering tested application modules and configuring observability alerts. Use Upwork Messages and the contract workroom for all communication and project management tasks. Identity verification, payment protection, hourly tracking, and project funds keep the engagement secure.

  • Define deliverables such as compiled code repositories, infrastructure-as-code scripts, and documented API endpoints.
  • Establish acceptance criteria based on successful execution of integration tests and performance benchmarks in staging.
  • Agree on a schedule for handing over monitoring configurations and operational runbooks for the production environment.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring a Certified Oracle cloud developer cost?

$500-$2,500 per project is a typical range for focused Certified Oracle cloud developer work. Final pricing depends on scope, technical complexity, required integrations, source-material quality, revision needs, and the freelancer's experience level.

Cloud-native application design

$500-$1,200/project

Entry-level to mid-level
  • Documented design for OCI services and distributed computing concepts
  • Defined IAM policies and secret management strategy
  • Visualized microservices or serverless function structure

Serverless function development

$1,200-$3,000/project

Mid-level
  • Built serverless applications using Oracle Functions
  • Connected components via OCI APIs, SDKs, or CLI
  • Validated logic across dev and test environments

Microservices deployment

$3,000-$6,000/project

Mid-level to senior-level
  • Deployed application components to Oracle Kubernetes Engine
  • Compiled and pushed container artifacts for runtime
  • Automated service connections using OCI CLI tools

Observability setup

$6,000-$9,500/project

Senior-level
  • Configured metrics and logging for cloud-native apps
  • Defined triggers for operational anomalies and failures
  • Documented troubleshooting steps and maintenance procedures

Full-stack OCI implementation

$9,500-$15,000/project

Expert-level
  • Architected and built complete cloud-native solution on OCI
  • Released validated code to prod with rollback capabilities
  • Analyzed observability data and optimized resource usage

Frequently asked questions

Is hiring a Certified Oracle cloud developer worth it?

For most businesses, yes: hiring a Certified Oracle cloud developer is worthwhile. This certification validates the ability to design and build cloud-native applications specifically for Oracle Cloud Infrastructure. You gain a freelancer who understands OCI services, security protocols, and deployment workflows without requiring extensive onboarding.

How do I evaluate Certified Oracle cloud developer candidates?

Look for specific experience with Oracle Functions or Oracle Kubernetes Engine to confirm hands-on capability. Ask candidates to describe how they used OCI APIs or SDKs to integrate application components, as this demonstrates practical integration skills beyond theoretical knowledge.

What tasks does a Certified Oracle cloud developer handle?

These developers build serverless applications and microservices that run on Oracle Cloud Infrastructure. They also configure identity and access management policies and set up monitoring tools to track application performance across development and production environments.

Which tools do Certified Oracle cloud developers use?

They work with Oracle Functions, Oracle Kubernetes Engine, and the OCI command-line interface. These professionals also use software development kits and application programming interfaces to connect their code with core Oracle Cloud services.