23.07.2026 aktualisiert
100 % verfügbar
Senior Legacy Systems Specialist & Database Architect
Juba, Sudan
Nur Remote
B.Sc. in Electrical and Computer EngineeringÜber mich
Senior Systems & Database Specialist with 30+ years in COBOL, VAX/VMS, & Cognos PowerHouse. Expert in maintaining mission-critical legacy systems, tuning databases, and building smooth pipelines to modern SQL workflows. I deliver high performance, zero downtime, and total reliability.
Skills
Legacy Systems & Mainframe
Expertise in COBOL, VAX/VMS (OpenVMS), and Cognos PowerHouse (QUIZ, QUICK, QTP), including DCL (Digital Command Language). Maintenance, optimization, and migration of mission-critical legacy applications across telecommunications, banking, and industrial sectors.
Database Management & Architecture
Deep knowledge of PostgreSQL, SQL Server, and Oracle. Proficiency in complex SQL queries, database optimization, schema design, and data migration. Design and execution of smooth data extraction and migration pipelines from legacy flat files to modern enterprise SQL databases.
Data Analysis & Modeling
Solid background in data warehousing, ETL processes, predictive analytics, and statistical analysis using tools such as SPSS and RStudio. Delivery of high-precision analytical models and automated reporting pipelines.
Systems & Programming Languages
Proficiency in Python, C/C++, and Shell Scripting. Development of bridge scripts to interface legacy VAX/VMS data outputs with modern web and desktop dashboards and analytics platforms.
ERP Customization & Legacy System Integration
Experience in ERP customization and legacy system integration, bridging old enterprise infrastructure with modern data pipelines across multi-department enterprise setups.
Database Performance Optimization
Refactoring of legacy relational structures and complex SQL queries to improve overall system execution speed and data processing accuracy. Query tuning, database restructuring, and backend logic debugging.
Industry Expertise
Extensive experience in telecom infrastructure, banking and financial operations, enterprise resource planning (ERP), and industrial systems spanning over 30 years of professional practice.
PyQt & PostgreSQL
Practical application of PyQt and PostgreSQL in the development and integration of modern data-driven desktop applications alongside legacy system environments.
Expertise in COBOL, VAX/VMS (OpenVMS), and Cognos PowerHouse (QUIZ, QUICK, QTP), including DCL (Digital Command Language). Maintenance, optimization, and migration of mission-critical legacy applications across telecommunications, banking, and industrial sectors.
Database Management & Architecture
Deep knowledge of PostgreSQL, SQL Server, and Oracle. Proficiency in complex SQL queries, database optimization, schema design, and data migration. Design and execution of smooth data extraction and migration pipelines from legacy flat files to modern enterprise SQL databases.
Data Analysis & Modeling
Solid background in data warehousing, ETL processes, predictive analytics, and statistical analysis using tools such as SPSS and RStudio. Delivery of high-precision analytical models and automated reporting pipelines.
Systems & Programming Languages
Proficiency in Python, C/C++, and Shell Scripting. Development of bridge scripts to interface legacy VAX/VMS data outputs with modern web and desktop dashboards and analytics platforms.
ERP Customization & Legacy System Integration
Experience in ERP customization and legacy system integration, bridging old enterprise infrastructure with modern data pipelines across multi-department enterprise setups.
Database Performance Optimization
Refactoring of legacy relational structures and complex SQL queries to improve overall system execution speed and data processing accuracy. Query tuning, database restructuring, and backend logic debugging.
Industry Expertise
Extensive experience in telecom infrastructure, banking and financial operations, enterprise resource planning (ERP), and industrial systems spanning over 30 years of professional practice.
PyQt & PostgreSQL
Practical application of PyQt and PostgreSQL in the development and integration of modern data-driven desktop applications alongside legacy system environments.
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit1995
Sprachen
ArabicMutterspracheEnglishverhandlungssicher
Projekthistorie
Providing specialized technical consulting for enterprise clients running mission-critical COBOL applications on VAX/VMS (OpenVMS) environments. Maintaining and optimizing legacy financial and reporting systems utilizing Cognos PowerHouse suite (QUIZ, QUICK, QTP). Designing and executing data extraction and migration pipelines from legacy flat files to modern enterprise SQL databases (PostgreSQL/SQL Server). Performing query tuning, database restructuring, and backend logic debugging to ensure high availability and minimal latency.
Managed large-scale data systems and telecom operational metrics, delivering high-precision database architecture and analytical models. Automated reporting pipelines and streamlined data workflows across infrastructure and maintenance units.
Oversaw financial data integrity, ledger structures, and reporting engines using complex database queries and automated enterprise tools. Bridged technical engineering requirements with core financial and accounting frameworks.