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At Cognizant we have an ideal opportunity for you to be part of one of the largest companies in the digital sector worldwide. A Great Place To Work where we look for people who contribute new ideas, experiencing a dynamic and growing environment. At Cognizant we promote an inclusive culture, where we value different perspectives providing career growth and development opportunities. #WelcomeToCognizant!

Job Description: PostgreSQL Database Administrator
About the Role
We are seeking an experienced PostgreSQL Database Administrator to support and maintain enterprise AWS database infrastructure. This role is primarily support and advisory in nature — working closely with application teams to troubleshoot issues, implementing changes, guide migrations, and ensure database stability. The idóneo candidate brings deep PostgreSQL architecture knowledge, hands-on AWS experience, and strong operational discipline.

Key Responsibilities

Administer and maintain PostgreSQL and RDS PostgreSQL instances across dev, test, QA, and production environments

Support application teams in troubleshooting database issues, replication failures, connectivity problems, and performance degradation

Assist app teams in resolving AWS DMS issues including task failures, CDC lag, table errors, and cutover coordination

Deploy and manage database infrastructure using AWS CloudFormation templates

Monitor database health, set up alarms, and analyze logs using Amazon CloudWatch and CloudWatch Log Insights

Audit database activity and support compliance reviews using AWS CloudTrail

Troubleshoot and resolve logical replication issues including lag, slot bloat, and subscription failures

Manage roles, users, schemas, and privileges across multiple databases and environments

Tune query performance using execution plans, auto_explain, parameter group optimization,



and session management

Raise, track, and resolve incidents and change requests through ServiceNow (ITSM)

Perform DBA operations on Linux environments including log analysis, file management, and Shell/Python based automation

Support SDE/ArcGIS geodatabase environments hosted on Aurora PostgreSQL

Maintain documentation and runbooks for database operations and incident resolution

Perform minor and major Aurora PostgreSQL version upgrades including pre-upgrade assessments, snapshot backups, parameter group validation, extension compatibility checks, and post-upgrade monitoring

Coordinate and document all upgrade activities through ServiceNow change requests with rollback plans and CAB approval

Required Skills

Strong understanding of PostgreSQL architecture — WAL, MVCC, autovacuum, connection pooling, replication slots and partitioning

Hands‑on experience with AWS DMS — troubleshooting task failures, CDC replication issues, and supporting app teams through migration challenges

Proficiency with AWS CloudFormation for infrastructure-as-code

Experience with Amazon CloudWatch — dashboards, metrics, log insights, and alarm configuration

Familiarity with AWS CloudTrail for auditing API activity and compliance

Solid knowledge of PostgreSQL security — roles, schemas, privileges, and access control

Experience with ServiceNow for incident management, change requests, and ITSM workflows

Comfortable working in Linux environments — log parsing, shell scripting,



file operations, and CLI-based database administration

Ability to write PL/pgSQL , dynamic SQL, and maintenance automation scripts

Good to Have

Familiarity with SDE/ArcGIS geodatabases on PostgreSQL

Knowledge of logical replication setup (publications, subscriptions)

Experience working with CyberArk Vault

Soft Skills

Strong communicator — able to guide and advise application teams clearly during incidents

Comfortable working within formal change advisory (CAB) processes

Self-driven and capable of managing multiple concurrent support requests independently

Why Cognizant?
Improve your career in one of the largest and fastest growing IT services providers worldwide

Receive ongoing support and funding with training and development plans

Have a highly competitive benefits and salary package

Get the opportunity to work for leading global companies

We are committed to respecting human rights and build a better future by helping your minds and the environment

We invest in people and their wellbeing.

We create conditions for everyone to thrive. We do not discriminate based on race, religion, color, sex, age, disability, nationality, sexual orientation, gender identity or expression, or for any other reason covered.

Igualdad de Empleo y Política de Acción Afirmativa:

Cognizant es un empleador que ofrece igualdad de oportunidades. Todos los solicitantes calificados recibirán consideración para el empleo sin distinción de sexo, identidad de género, orientación sexual, raza, color, religión, origen nacional, discapacidad, estado de veterano protegido, edad o cualquier otra característica protegida por la ley.

At Cognizant we believe than our culture make us stronger!

#BeCognizant #IntuitionEngineered

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📌 Postgres SQL Database Administrator (Nezahualcóyotl)
🏢 Cognizant
📍 Nezahualcóyotl