Remote Mainframe Modernization Architect | PostgreSQL

Adecco Portugal; Polska; Remote; PLN 180,000 - 260,000; Full time

Job summary

Adecco Portugal is seeking a senior Database Architect / Mainframe Database SME for a 12-month B2B engagement in Poland (remote). The role focuses on designing target data architecture, leading complex migrations from legacy mainframe databases to PostgreSQL, and ensuring data integrity, performance, and quality throughout the modernization journey.

The candidate will helm end-to-end migration strategies, model data, and establish governance, with deep expertise in DB2, VSAM, IMS, and enterprise

Qualifications

• Total Experience: 10+ years.
• Relevant Experience: 5+ years in Database Architecture, Data Migration, or Mainframe Modernization.
• Strong experience in Database Architecture and Enterprise Data Modeling.
• Proven expertise in Data Migration Design and execution.
• Experience developing Data Quality Strategies and governance frameworks.
• Hands-on with DB2-to-PostgreSQL conversions.
• Experience migrating VSAM datasets to relational databases.
• Knowledge of IMS hierarchical databases and conversion methodologies.
• Strong Data Lineage, metadata management, and governance understanding.
• Expertise in Index Design, tuning, and performance optimization.
• Experience in large-scale legacy modernization or mainframe transformation initiatives.

Responsibilities

• Define and govern the target data architecture for modernization programs.
• Design logical and physical data models aligned with business and technical requirements.
• Develop end-to-end data migration strategies and conversion approaches.
• Lead migration activities from legacy mainframe databases to PostgreSQL.
• Design and implement data quality frameworks, validation processes, and reconciliation strategies.
• Collaborate with application, infrastructure, and business teams throughout the migration lifecycle.

Skills

Database Architecture

Data Migration

Mainframe Modernization

DB2 to PostgreSQL

PostgreSQL

Data Modeling

Data Quality

Data Lineage

Index Design

Performance Tuning

Tools

DB2

VSAM

IMS

PostgreSQL

Job description

Adecco Portugal is seeking a senior Database Architect / Mainframe Database SME for a 12-month B2B engagement in Poland (remote). The role focuses on designing target data architecture, leading complex migrations from legacy mainframe databases to PostgreSQL, and ensuring data integrity, performance, and quality throughout the modernization journey.

The candidate will helm end-to-end migration strategies, model data, and establish governance, with deep expertise in DB2, VSAM, IMS, and enterprise