PL/SQL Expert in Düsseldorf
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Meet FRATCH Experts in Düsseldorf, who have recently used PL/SQL
Rekha M.
Last position:
SAP SD Consultant at WBS Group
- Introduction of a new payment term including its description, as well as a new shipping condition
- Configuration of item category determination (Item Category Determination)
- Implementation of the minimum price calculation (Floor Price) in the pricing procedure
- Setup of the intercompany third-party transaction (direct delivery) and addition of the direct delivery indicator to the invoice
- Prevention of delivery splits (Delivery Split) in sales orders
- Masking of the expiration date and net weight fields
- Transfer of the sales group from the quotation to the sales order
- Analysis and resolution of a pop-up appearing when creating sales orders
- Analysis and resolution of order confirmations that were created and sent with €0.00 per item
Jürgen S.
Last position:
IT – Consultant / Analyst / Developer / Tester / Support at Automotive manufacturer
- Analysis, software development/adaptation and testing of various transaction and batch objects
- Execution of specialist integration and regression tests on TEST and QA platforms under z/OS for subsequent implementation in production
- Hardware / software / tools: IBM-MVS, z/OS, JES2/3, TSO-ISPF, JCL, DB2, SQL, SQL/PL, QMF, QMF for Work-Stations, 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
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
Dalia C.
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based DWH and ETL system to replace legacy mainframe applications
- Development of a database optimization strategy and planning the rapid conversion of JCL and COBOL routines to PL/SQL with the help of AI
- Development of an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, employee training)
- Implementation of PL/SQL workflows for approval processes and creation of a responsive mobile version with JavaScript and CSS
- Use of Azure DevOps for backlog and documentation, as well as Git for version control
- Development of REST interfaces for CRM systems
- Replacement and reprogramming of Oracle Forms screens with Oracle Apex and upgrading to the latest Apex versions
- Design of a Git branching strategy and conducting code reviews
- Maintenance and further development of an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Data analysis and creation of charts in the Oracle Apex frontend; installation of standalone ORDS and Apex 23.1
- Agile working according to the Spotify Model; development of complex Apex screens with the support of Oracle JET
- New development and customization of existing PL/SQL packages, workarounds for database version differences and query optimization
- Development of Apex applications for broker pools to manage and optimize Oracle databases in the banking sector, including SSO-based authorization systems with OAuth2 and Keycloak
- Development of extensive Oracle Apex applications for BI and data mining modernization projects, as well as development of manual and automated projection methods in the frontend
- Implementation of data warehousing projects in the banking sector and use of Scrum and Kanban in team-oriented projects
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.
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
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
29 years (Germany: 24 years)
Position duration
2.7 years (Germany: 3.2 years)
Positions per freelancer
17
Top business areas
Information Technology, Project Management, Business Intelligence
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
50% (Germany: 53%)
Doctorate
17% (Germany: 6%)
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 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Düsseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging 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 29 Oct 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 (91%)
- Government and Administration (73%)
- Automotive (64%)
- Telecommunication (64%)
- Banking and Finance (55%)
- Professional Services (55%)
- Manufacturing (45%)
- Retail (45%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Oracle Database Foundations
PL/SQL is Oracle’s procedural extension to SQL. It adds variables, conditions, loops, exception handling and reusable program units to database work. Companies use it to keep business rules close to data and to process transactions reliably inside Oracle Database.
Packages and Data Logic
PL/SQL specialists create packages, procedures, functions, triggers and database jobs. They build validation flows, reporting logic, batch processing and integration routines that support finance, logistics, manufacturing and public-sector systems. Good design keeps interfaces clear and limits unnecessary coupling.
Tools and Ecosystem
The work commonly includes Oracle Database, SQL, Oracle SQL Developer, PL/SQL Developer and version control. Strong specialists also understand:
- Query plans, indexing and transaction control
- Cursors, collections and exception handling
- REST integration, JSON and XML data
- Testing, deployment and schema migration
When Companies Need Support
Freelance expertise helps when a legacy Oracle application needs careful change without disrupting daily operations. It is also useful for slow queries, complex data migrations, unstable batch jobs, audit requirements or a move toward service-based architectures. In Düsseldorf, on-site workshops can complement remote delivery for teams working across German and English environments.
What Strong Experts Deliver
The best professionals trace a business requirement through SQL, PL/SQL and the surrounding application. They measure before tuning, handle locking and failure cases deliberately, and document dependencies between schemas and releases. They also know when logic belongs in the database and when it should move into an application service.
Selecting the Right Specialist
Look for practical evidence with the Oracle version, data volume and release process relevant to the project. Ask for examples of performance investigations, package design, testing and production incident handling. For remote or on-site collaboration in Düsseldorf, clarify access controls, communication language, working hours and handover expectations before work begins.
Frequently asked questions
Need clarity? These are the questions we hear most often about PL/SQL.
PL/SQL is used to write procedural logic that runs inside Oracle Database. Companies use it for stored procedures, functions, triggers, data validation, transaction workflows, reporting processes and scheduled batch operations.
PL/SQL runs close to Oracle data, which can reduce data movement and keep transactional rules consistent. Application-layer code may be easier to scale across database vendors, so the right choice depends on portability, performance, team skills and where the business logic is best maintained.
A strong PL/SQL specialist usually works confidently with SQL, Oracle Database design, query execution plans, indexing and transaction control. Experience with Java, REST services, JSON, XML, Linux, version control and schema migration tools is also valuable when the database supports a wider application.
For PL/SQL work, relevant experience matters more than a generic database background. Look for professionals who have handled the same type of workload, Oracle environment, release process and operational risk, especially if the project involves legacy packages, high-value transactions or difficult performance issues.
PL/SQL work is often suitable for remote collaboration because specialists can review schemas, code, execution plans and deployment pipelines securely. Teams in Düsseldorf should still agree on access procedures, documentation, German or English communication, workshop needs and availability for production support.
PL/SQL is a strong fit when Oracle Database is central to the system and the work benefits from close transactional processing. A different database language may be preferable when portability, multi-database support or a cloud-native architecture is more important than Oracle-specific capabilities.
Review how a PL/SQL professional explains data models, execution plans, locking, error handling and deployment risk. Ask for anonymized examples of tuning or refactoring work, and check whether the specialist uses tests, code review, monitoring and rollback plans rather than relying on database changes that are difficult to verify.
A capable PL/SQL specialist may simplify package interfaces, remove repeated queries, improve indexing decisions and make batch processes safer. They can also identify hidden dependencies, clarify transaction boundaries and prepare database logic for controlled testing and release management.
The average hourly rate of freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects is 99 €, which corresponds to a daily rate of about 790 € 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, 50% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects have 29 years of professional experience, with a single engagement typically lasting around 2.7 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 (27%).
The most common industries among freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects are Information Technology (91%), Government and Administration (73%), and Automotive (64%).
The most common business areas among freelancers in Dusseldorf, Germany who have used PL/SQL in their recent projects are Information Technology (100%), Project Management (73%), and Business Intelligence (64%).
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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