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Jean Techer

@jeantecher

PostgreSQL DBA who tuned databases, set up high availability across the USA and Europe, and supported PostgreSQL teams.

At CLARIO, I tuned PostgreSQL databases, set up high availability between the USA and Europe, and developed backup strategies for database restoration. I also performed major PostgreSQL upgrades and supported systems 24/7.

Across roles at WORDLINE, CAPGEMINI, and other teams, I worked on PostgreSQL and SQL Server issues, authentication migration scripts, and PostgreSQL upgrades. At 01MAP, I wrote the first PostGIS documentation for the French community and contributed to open-source geospatial projects.

Experience

Work history, roles, and key accomplishments

Support technical engineer

Fives Intralogistics SAS

Feb 2026 - May 2026 (3 months)

Provided Tier 3 support, fixing SQL Server issues.

SQL Server Tier 3 Support

DevOps Engineer

1Life - Part of Visiativ

Apr 2025 - Oct 2025 (6 months)

Deployed home-made ERP solution based on Odoo to client platforms and wrote technical documentation for internal teams.

DevOps Odoo Technical Documentation

PostgreSQL / SQL Server DBA

Capgemini

Jan 2025 - Feb 2025 (1 month)

Enhanced AWS experience and supported DBAs team to fix PostgreSQL issues, including major version upgrades and tuning.

PostgreSQL SQL Server AWS Database Tuning

PostgreSQL DBRE

Wordline

Aug 2024 - Oct 2024 (2 months)

Fixed pgbouncer issues for authentication migration from md5 to scram, and wrote scripts for the migration.

PostgreSQL PG Bouncer Gitlab Ansible Terraform Scripting

Senior PostgreSQL DBA

Clario

Jul 2011 - Aug 2024 (13 years 1 month)

Worked on EnterpriseDB solutions, tuned PostgreSQL databases, set up high availability and backup strategies, and performed major upgrades.

PostgreSQL EnterpriseDB High Availability Backup Strategies Pg_upgrade Tuning

Oracle DBA/Linux SysAdmin

Pack Solutions

Sep 2009 - Jun 2011 (1 year 9 months)

Upgraded and maintained Oracle databases, supported internal teams, and administered Linux for internal platform.

Oracle Linux System Administration

PostgreSQL DBA

Alten

Apr 2008 - Jul 2009 (1 year 3 months)

Maintained 640 PostgreSQL clusters across 4 data centers, migrated PostgreSQL from 8.1 to 8.3, and wrote technical documentation.

PostgreSQL Database Migration Technical Documentation

Linux Administrator

EPSI

Jul 2007 - Dec 2007 (5 months)

Maintained internal servers based on Linux and Windows.

Linux Windows System Administration

PostgreSQL Developer

01MAP

Jun 2003 - Apr 2007 (3 years 10 months)

Wrote the first PostGIS documentation for the French community, contributed to open source projects for geospatial requests, and trained clients on PostgreSQL and PostGIS.

PostgreSQL PostGIS Open Source Geospatial Training