Consultant for Oracle based systems - since 1995

Development of an Oracle & Java based Customer Loyalty system.

New Oracle 11g based back-end & Java/JPA2/Hibernate based front-end Customer Loyalty system to be used as a global platform.

Tasks:

Development and support within the Oracle-related part of the system:

• data modeling to support high data volumes (partitioning, DWH staging tables)

• development of a configurable table partitioning framework (PL/SQL and Python)

• design/implementing of a PL/SQL module to export transactions data to the financial sub-system (supports gap-free export file numbers and gap-free line numbers within these files)

• implementing of a PL/SQL module to process the personal data disclosure requests

• server side programming (PL/SQL) – e.g. Rating and Billing modules with the XML-based rules, module to export the billing data to the financial system

• data migration within the loyalty module

• support for Java developers at design and implementation of the Java persistence layer regarding SQL-statements

• support for team members in the Oracle / SQL area

Software: ORACLE RDBMS 11g, JPA2/Hibernate, Weblogic, Maven, Jenkins, Confluence, Oracle SQL-Developer / Data Modeler, PL/SQL Developer

Automatic transfer of the adverse events related data, gathered during clinical trials for new drugs within an Oracle Clinical database (Oracle 9i), to the Drug Safety System – Adverse Drug Event & Reaction Reporting system (ARISg 5.1.2, Oracle 10g) – a new project by a major pharmaceutical company in a GxP-validated environment, which deliveres a generic XML-based publishing service for Oracle Clinical data, prepared for future use of an Enterprise Service Bus.

Tasks:

• evaluation, clarification and fine-tuning of user requirements

• creation of functional specifications, software design specifications and development tests

• conceptual design of the system

• creation of the underlying XML schema

• database design and implementation, installation scripts on the Oracle Clinical side and on the ARISg side

• code implementation (server-side PL/SQL), including error logging, auditing and tracing sub-systems on the Oracle Clinical side and on the ARISg side

• performance tuning on the Oracle Clinical side

• support for user acceptance tests and application validation

Software: ORACLE RDBMS 9i and 10g

Database-related third-level support, enhancements and development around Adverse Drug Event & Reaction Reporting system (ARISg 5.1.2) by a major pharmaceutical company in a GxP-validated environment.

Tasks:

• enhancements / corrections to the customized parts of the ARISg application (server-side PL/SQL code)

• development of in-house web applications (back-end Oracle 10g) to provide additional functionality for ARISg users (Oracle Application Express)

• implementing / applying data correction scripts (SQL and PL/SQL)

• third-level support for ARISg application (database-related)

• code quality control

• general support for team members in the Oracle area

Software: ORACLE RDBMS 10g

Data migration GxP project by a major pharmaceutical company - merge of regional production databases spread worldwide into a single database, with concurrent migration / customization of the related third-party application (ARISg - Adverse Drug Event & Reaction Reporting system) to a new major release (5.1.2) and migration to Oracle 10g from Oracle 9i.

Tasks:

Support for the migration team:

• validation / corrections to the data migration procedures

• performance tuning for the data migration scripts

• accomplishment of the initial and incremental data migration

• validation / corrections to the customized parts of the ARISg application (server-side PL/SQL code)

• creation of new server-side PL/SQL procedures in the customized part of the application

• code quality control

• general support for team members in the Oracle area

Software: ORACLE RDBMS 9i and 10g

Development of an Oracle & Java based Billing and Customer Care system for an Australian telecommunication company (Landline and Cellurar / GSM operator)

New Oracle 10g based back-end & Java/Hibernate based front-end Billing and Customer Care system for an Australian Landline, Cellurar and GSM operator, which needs to replace their legacy system (full cycle from CDR processing to bill presentation). Includes features like flexible bill cycle and bill run management, bill previews, usage caps, discounting, re-rating and real time billing. Initial CDR validation is implemented in PL/SQL, Rating module is embedded SQL / Java & PL/SQL based, Billing / Invoicing modules are implemented in PL/SQL, and Invoice presentation in Java/XML.
Front end: Java/Hibernate GUI.

Tasks:

Responsibility for the Oracle-related part of the system design, development and support:

• creation of development specifications

• application DB-design, implementation and server side programming (PL/SQL) – Rating, Billing and Invoicing modules (here Billing module has been completely specified, designed and implemented from scratch single-handedly)

• complex core SQL for Rating module to be called from Java layer

• major corrections / enhancements in data replication to/from Accounts Receivables module

• design/code quality control

• database/application performance tuning

• support for team members in the Oracle area

• training for support team members

• on-site support of QA / performance tests

Software: ORACLE RDBMS 10g, Hibernate

Development of an Oracle based Billing and Customer Care system for US telecommunication companies (Cellurar/GSM operators) (Releases 1 and 2)

New Oracle 9i based Billing System (client-server) for US Cellurar and GSM operators (over 40 installations), which have to replace their COBOL based legacy systems (full cycle from CDR processing to bill presentation). Includes features like flexible bill cycle and bill run management with threading, bill previews, different kinds of free minutes (use or lose, rollover, shared), price tiering (incremental and total), different kinds of discounting (on usages, monthly fees, number of services), minimum consumption, re-rating, near real time billing.
Front end: Java GUI.

Tasks:

Oracle development team leader for the Billing / Rating server side module:

• requirements definition on-site with the customer

• creation of development specifications

• application DB-design and implementation

• server side programming (PL/SQL, Java stored procedures)

• support for developer team in the Oracle area

• design/code quality control

• on-site database/application performance tuning

• on-site processing of customers change requests

• on-site support for customer QA tests / end user acceptance tests

• on-site training and WebEx knowledge sharing sessions for the customer and for application support team members

• creation of application manuals / documentation for end users

Software: ORACLE RDBMS 9i, ORACLE Developer Suite 9i

Development of an Oracle 9i based Billing and Customer Care system for telecommunication companies (GSM operators).

Oracle 9i based Billing System (client-server) for the tier 3 GSM operators, includes Customer Care, Inventory Administration, GSM Network Provisioning, Rating, Billing and Accounts Receivable modules, plus Customization modules requested by customers.
Front end: Oracle Forms and Reports.
„Thin client“ – complex business logic implemented completely on the server side (via standardized table-APIs and DB-triggers, calling business rules packaged PL/SQL procedures).
Flexible and powerful security system (dynamically enabled Oracle roles, „fine-grained row-level access control“ and security policies via the DBMS_RLS package, DBA-tasks like create/drop users and roles, grant/revoke privileges are performed directly via the application, managing of DB-objects both from the application schema and from other schemas).
Full interface layer for data structures and business logic to enable independent “on-customer-site” development.
Data export from application to XML files.
 

Development of an Oracle 7/8/8i based Billing and Customer Care system for telecommunication companies (GSM operators).

Initially Oracle 7, then Oracle 8/8i based Billing System (client-server) for the tier 3 GSM operators, includes Customer Care, Inventory Administration, GSM Network Provisioning, Rating, Billing and Accounts Receivable modules, plus Customization modules requested by customers.
Front end: Oracle Forms and Reports.
„Thin client“ – complex business logic implemented completely on the server side (via standardized table-APIs and DB-triggers, calling business rules packaged PL/SQL procedures).
Flexible and powerful security system (dynamically enabled Oracle roles, „fine-grained row-level access control“ and security policies via the DBMS_RLS package, DBA-tasks like create/drop users and roles, grant/revoke privileges are performed directly via the application, managing of DB-objects both from the application schema and from other schemas).
Full interface layer for data structures and business logic to enable independent “on-customer-site” development.
Data export from application to XML files.

Server-side development is done with Oracle Designer/2000, client-side development with Oracle Designer/2000, Developer/2000 and Headstart.
All Forms and most of Reports are 100% generated (zero-gap).
Presentation logic implemented as PL/SQL code directly in Forms or (if reusable) in attached client side PL/SQL libraries.
Common look & feel due to using of object libraries, templates and preference sets.

Tasks - Oracle development team leader:
· application System- and DB-design and implementation
· creation of development specifications
· technical development management
· support for other developers in the Oracle area
· design/code quality control
· programming (server-side and client-side)
· performance tuning
· support for end customers
· configuration management in emergency cases
· DBA-tasks in emergency cases

Development of a Construction Data Management system for a major automobile construction company

Oracle 7 based client-server application to manage constructional data of automobiles and their modules/components.
Front end: C++ based screens.
Access to the (distributed) Oracle database via Oracle Pro*C.

Tasks:

• DB-design

• programming (server-side: packaged PL/SQL procedures)

• performance tuning

Software: ORACLE RDBMS 7, Oracle Pro*C, C++

Development of an Ordering, Purchase and Delivery system for a major plant construction company.

Oracle 7 based client-server application to manage goods ordering, purchase and delivery, integrated into the heterogeneous software system of the company, therefore many interfaces to other non-Oracle applications (e.g. DB2, legacy systems, MS Excel).
Front end: Oracle Forms and Reports.
Complex business logic implemented completely on the server side (via standardized table-APIs and DB-triggers, calling packaged PL/SQL procedures).
Server-side development is done with Oracle Designer/2000, client-side development with Oracle Designer/2000 and Developer/2000.
Forms and Reports have been generated with the Designer/2000 and then changed “manually” with the Developer/2000 (mainly the complex presentation logic has been added: standardized Form-level triggers called PL/SQL procedures form attached libraries).
Common look & feel due to using of templates and preference sets.

Tasks:

• DB-design and implementation

• programming (server-and client-side)

• performance tuning

• customer support

Development of a Construction Data Management system for a major automobile construction company

Oracle 7 based client-server application to manage constructional data of automobiles and their modules/components.
Front end: C++ based screens.
Access to the (distributed) Oracle database via Oracle Pro*C.

Tasks:

• DB-design

• programming (server-side: packaged PL/SQL procedures)

• performance tuning

Software: ORACLE RDBMS 7, Oracle Pro*C, C++

Development of an Ordering, Purchase and Delivery system for a major plant construction company.

Oracle 7 based client-server application to manage goods ordering, purchase and delivery, integrated into the heterogeneous software system of the company, therefore many interfaces to other non-Oracle applications (e.g. DB2, legacy systems, MS Excel).
Front end: Oracle Forms and Reports.
Complex business logic implemented completely on the server side (via standardized table-APIs and DB-triggers, calling packaged PL/SQL procedures).
Server-side development is done with Oracle Designer/2000, client-side development with Oracle Designer/2000 and Developer/2000.
Forms and Reports have been generated with the Designer/2000 and then changed “manually” with the Developer/2000 (mainly the complex presentation logic has been added: standardized Form-level triggers called PL/SQL procedures form attached libraries).
Common look & feel due to using of templates and preference sets.

Tasks:

• DB-design and implementation

• programming (server-and client-side)

• performance tuning

• customer support

Change request for a Quality Control system, used by a major automobile construction company

Oracle 7 based client-server application to manage various data, obtained during different quality control procedures.
Front end: Oracle Forms and Reports.
Business logic implemented partially on the server side (via DB-triggers and packaged PL/SQL procedures), and partially on the client side.
Server-side development is done with Oracle Designer/2000, client-side development with Oracle Designer/2000 and Developer/2000.
Most of Forms and Reports have been generated with the Designer/2000 and then changed “manually” with the Developer/2000, and some Forms have been created completely with Developer/2000.

Tasks:

• Server-side and client-side programming

• Forms generation and manual changing/creation

Software: ORACLE RDBMS 7, ORACLE Developer/2000 R 1.3.2, ORACLE Designer/2000 R 1.3.2

Development of a Hospital Management system for German hospitals.

Oracle 7 based highly secured client-server application to manage various processes in a hospital, mainly for the surgery area.
Front end: Oracle Forms and Reports.
Business logic implemented on the client side (directly in Forms or in PL/SQL libraries).
Server-side development (on the later stage) with Oracle Designer/2000, client-side development with Developer/2000.
Forms and Reports have been created with the Developer/2000.

Tasks:

• Server-side and client-side programming

• Forms creation

• Database administration and tuning

Software: ORACLE RDBMS 7, ORACLE Developer/2000 R 1.3.2, ORACLE Designer/2000 R 1.3.2