Senior Database Engineer​/Database Architect; PostgreSQL Migration

For our client in the telecommunications sector, we are looking for an experienced Senior Database Engineer / Database Architect to support a strategic database migration from Microsoft SQL Server to PostgreSQL.

The role focuses on database architecture, migration planning, performance optimisation and technical consulting within a complex enterprise environment. The consultant will work closely with architecture, development and operations teams and support the full migration lifecycle from assessment to implementation and knowledge transfer.

• Advise and support the migration from Microsoft SQL Server to PostgreSQL
• Define and review target architectures for PostgreSQL-based environments
• Analyse existing database landscapes, data models and workloads
• Plan and execute database migrations, including migration strategy and cutover concepts
• Assess and optimise database performance, query tuning and resource consumption
• Conduct sizing, capacity and scalability analyses
• Advise on high availability, disaster recovery, backup and restore strategies
• Support the migration of database objects such as stored procedures, views, functions and triggers
• Identify SQL Server-specific dependencies and define suitable PostgreSQL target implementations
• Support test concepts, migration testing and performance testing
• Create technical documentation, guidelines and best practices
• Transfer knowledge to internal teams and operational units
• Based in Switzerland, with work performed exclusively in Switzerland
• At least 8–10 years of experience as a Database Engineer, Database Architect or DBA
• Several years of hands‑on experience with PostgreSQL in enterprise environments
• Proven project experience in migrations from Microsoft SQL Server to PostgreSQL
• Strong knowledge of PostgreSQL architecture and internals
• Strong experience in query optimisation and performance tuning
• Good knowledge of indexing strategies and partitioning
• Experience with high availability and replication concepts
• Strong understanding of backup and recovery concepts
• Experience with capacity planning, sizing and scalability assessments
• Very good SQL skills
• Experience with migration tools and database assessment methods
• Ability to identify technical risks early and propose suitable mitigation measures
• Very good communication and consulting skills