PL/SQL Expert in Düsseldorf
to strengthen Oracle systems with vetted, available freelancersHire experts who optimize Oracle databases, build reliable stored procedures, and modernize data-heavy business applications. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical and delivery needs.
Meet FRATCH Experts in Düsseldorf, who have recently used PL/SQL
Thorsten L.
Last position:
Senior Security Analyst
- Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
- System analysis
- Threat modeling
- Decision-making on vulnerability mitigation strategies
- Implementation of vulnerability detection mechanisms
- Security scans
- DevSecOps practices
- Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
- Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL
Andreas G.
Last position:
Senior Fullstack .NET (Core) & Angular Developer at IT Service Provider
- Supporting several agile teams in the new product development of an enterprise CRM and ERP application
- Web frontend development with Angular 17–21 (microfrontends, Domain-Driven Design, MDB-Bootstrap)
- Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
- Technical feature design for assigned tasks
- Technical architecture design including forward-looking planning of AI-supported extension options
- Proof-of-concept implementation of AI-supported workflows with n8n and a locally hosted LLM (Ollama)
- Coordination with stakeholders and Product Owners, support with sprint planning
Result: Delivery of production-ready microservices and frontend modules in agile sprint cycles.
Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama
Younes H.
Last position:
Senior Backend Developer at PTA
- Development and maintenance of database-driven applications for managing supplier and food contracts, with extensive use of Oracle PL/SQL for complex business logic and data processing
- Optimization of PL/SQL procedures, functions, and triggers to ensure the performance and scalability of Oracle database solutions
- Ensuring compliance with best practices in PL/SQL development and implementing standards for code quality and data integrity
- Close collaboration with backend and frontend teams to ensure smooth integration between the Oracle database, C#-based APIs, and Azure cloud services
Adnan K.
Last position:
Chief Information Officer at ARLANXEO Deutschland GmbH
- Executed post-carve-out stabilization, system consolidation and cybersecurity uplift. Re-assessed system landscape and assets and designed new IT strategy for future. Implemented new IT operating model focusing on product-centric organization and re-internalization of critical resources.
- Successfully designed new IT operating model of the company, based on massive reduction of external dependencies, insourcing of key positions and upskilling of employees.
- Massive reduction of IT cost in the first three years (-40m$), bringing IT spend level below Gartner industry benchmark (1.27%).
- Introduced new product-centric organization based on fusion teams between business and IT across the company.
- Administered implementation of corporate-wide IT/OT cybersecurity program with more than 60 projects.
- Continuous improvement of enterprise IT/OT cybersecurity maturity level with significant increase in the first two years (CMMI >3.5, C2M2 >2.5).
- Governed successful implementation of the business transformation program within IT area by overachieving the savings target by $8m.
- Initiated and created new cloud-based data management platform based on best-in-class technology.
- Implemented first company-wide Microsoft Copilot AI program based on various business cases, leveraging GenAI and AgenticAI.
Jürgen S.
Last position:
IT Consultant / Analyst / Developer / Tester / Support at Automotive Manufacturer
- Analysis, software development/customization, and testing of various transaction and batch objects
- Conducting functional integration and regression tests on TEST and QA platforms under z/OS for later production implementation
- Hardware / Software / Tools: IBM MVS, z/OS, JES2/3, TSO-ISPF, JCL, DB2, SQL, SQL/PL, QMF, QMF for Workstations, SPUFI, FileAid, IMS-DB/DC, MFS, XPEDITER, COBOL, REXX, Windows 10, MS Office 365, MS Teams, batch job management via OPC, BETA92, RVS, BVB, ABL, DIALOGplus, PROBA, PRODPR (VW internal systems), JIRA, CONFLUENCE
Sebastian C.
Last position:
Public institution responsible for educational institutions in NRW
- Consulting on processes and execution of load tests, performance tests and technical tests of various applications: web portal, file cloud, email, video conferencing, learning/course platform
- Creating the load test framework
- Programming test scripts (JMeter, Selenium)
- Developing batches to support the evaluation
- Executing load tests and evaluating results, including clear reporting, recommendations for action, and bottleneck analysis
- Managing tasks and collaboration to achieve meaningful load test results
Dalia C.
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
- Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
- Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
- Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
- Used Azure DevOps for backlog management and documentation, and Git for version control
- Developed REST interfaces to CRM systems
- Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
- Designed a Git branching strategy and conducted code reviews
- Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
- Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
- Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
- Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
- Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
- Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects
Ulaş Ö.
Last position:
Freelance Business Intelligence Data Modeler at Vodafone Turkey
- Developed an in-depth understanding of the business processes and data in the corporation
- Assisted in maintaining the corporate data
Humayun S.
Last position:
Test Manager at ProSiebenSat.1 Media SE
- Quality assurance for 7 apps and websites as well as Galileo
- Designing, planning and executing tests
- Designing the test strategy in an agile team
- Planning, monitoring and coordinating test activities
- Reviewing and matching test cases
- Documenting test results
- Reviewing found defects
- Collaborating with developers
- Conducting regression tests
- Creating test summary reports
- Participating in various meetings with all stakeholders
- Approach, tools & systems: Jira, Android Studio, iOS, Android, Agile-Scrum
Werner H.
Last position:
Insurance company
- Migrations of DB2 databases to Oracle
- Design and setup of new databases based on ODA X7-HA / X9-HA RAC 12cR2 - 19.23 / Data Guard / GI 19c
- Hardware: ODA X7 X9 / IBM
- Software: Oracle 12c-19.23 / Oracle Linux Enterprise 7.1–8.8
Discover over 15,000 top freelancers
Statistics of experts using PL/SQL
Aggregated from the professional profiles of matched freelancers.
Experience
28 years (Germany: 24 years)
Position duration
2.5 years (Germany: 3.2 years)
Positions per freelancer
18 (Germany: 17)
Top business areas
Information Technology, Business Intelligence, Project Management
Top industries
Information Technology, Government and Administration, Automotive
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100% (Germany: 85%)
Master's degree or higher
60% (Germany: 53%)
Doctorate
20% (Germany: 7%)
Certifications per freelancer
6 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Düsseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Düsseldorf using PL/SQL
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
PL/SQL experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (90%)
- Government and Administration (80%)
- Automotive (70%)
- Professional Services (60%)
- Telecommunication (60%)
- Banking and Finance (50%)
- Manufacturing (50%)
- Retail (50%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Oracle Database Foundation
PL/SQL is Oracle’s procedural extension for SQL. It combines database queries with variables, conditions, loops, exception handling, and reusable program units. Companies use it to place business rules close to their data, reduce unnecessary application traffic, and process transactions consistently inside Oracle Database.
Systems and Use Cases
PL/SQL appears in core systems where reliable data processing matters, including finance, logistics, manufacturing, retail, insurance, and public services. Typical deliverables include:
- Stored procedures, functions, packages, and database triggers
- Batch jobs for imports, exports, reconciliation, and reporting
- Data validation and transformation workflows
- APIs and integration layers around Oracle data
- Refactoring of legacy database logic
Tools and Ecosystem
Strong PL/SQL work involves more than writing queries. Professionals use Oracle SQL Developer, SQL*Plus, Oracle Enterprise Manager, version control, automated testing, and deployment pipelines. They may also work with Oracle Forms, Reports, APEX, Java, REST services, ETL tools, and cloud database services where Oracle workloads are being extended or migrated.
When Expertise Helps
Companies often bring in freelance expertise during database modernization, production incidents, migrations, performance initiatives, or complex releases. Specialist support is useful when stored logic has grown difficult to test, when batch processing misses operational windows, or when a team needs to connect Oracle with newer services. In Düsseldorf, collaboration may combine remote delivery with on-site workshops, depending on security and stakeholder needs.
Performance and Reliability
A capable professional investigates execution plans, indexing, statistics, transaction boundaries, locking, and bulk processing before changing code. They distinguish slow SQL from inefficient PL/SQL control flow and measure improvements against realistic workloads. They also design clear exception handling, safe deployment steps, rollback options, and logging that helps operations teams resolve failures.
Choosing a Specialist
Look for practical evidence of Oracle database work similar to your own system, not only familiarity with syntax. Discuss data volume, release processes, testing standards, security constraints, and dependencies with application teams. A strong specialist explains trade-offs between database-side processing and application-side logic, documents assumptions, and leaves maintainable packages that your internal professionals can support after the engagement.
Frequently asked questions
Need clarity? These are the questions we hear most often about PL/SQL.
PL/SQL is used to create stored procedures, functions, packages, and triggers inside Oracle Database. It supports transaction processing, validation, reporting, batch work, and data transformation close to the data.
PL/SQL adds procedural features to SQL, such as variables, branching, loops, and exception handling. SQL describes the data operation, while PL/SQL coordinates multiple operations and applies business rules within Oracle.
PL/SQL is a strong fit when rules must run close to Oracle data, transactions need consistent control, or large data sets can be processed efficiently in the database. Application code may be preferable when logic must serve several database types or change independently from the data layer.
A strong PL/SQL specialist should understand Oracle SQL, data modeling, indexing, execution plans, transactions, and database security. Experience with source control, automated testing, deployment pipelines, REST integration, or Oracle APEX can also be valuable.
The right level depends on the work, not a fixed tenure. PL/SQL maintenance may need a specialist who can safely read existing packages, while performance tuning, migration design, and production recovery require deeper Oracle experience and strong diagnostic skills.
PL/SQL work is often suitable for remote collaboration through secure database access, shared repositories, and controlled deployment processes. On-site workshops in Düsseldorf can still help with discovery, access setup, operational handover, or discussions involving sensitive systems.
Review how the specialist handles execution plans, bulk operations, locking, exception paths, testing, and rollback. Good PL/SQL work is readable, measurable, documented, and safe to release; it should also address the root cause rather than only hide a slow query.
PL/SQL remains relevant during modernization because existing packages often contain critical business rules and data processes. A specialist can assess what to retain, refactor, expose through services, or move gradually while protecting data integrity and operational continuity.
The average hourly rate of freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects is 90 €, which corresponds to a daily rate of about 718 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects, 100% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 20% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects have 28 years of professional experience, with a single engagement typically lasting around 2.5 years.
The most common languages among freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects are German (100%), English (100%), and French (30%).
The most common industries among freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects are Information Technology (90%), Government and Administration (80%), and Automotive (70%).
The most common business areas among freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects are Information Technology (100%), Business Intelligence (70%), and Project Management (70%).
Main locations of FRATCH Experts, who have recently used PL/SQL
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
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FRATCH CEO
