Database Engineer (SQL)

TWISTO POLSKA sp. z o.o.Warszawa, Masovian, Poland

20 days ago

Job description

technologies-expected :

PostgreSQL
AWS
SQL
Terraform
Kubernetes

technologies-optional :

Snowflake Data Cloud

Kafka

about-project :

As a Database Engineer (SQL), you will play a key role in designing, optimizing, and scaling our database infrastructure. You will collaborate closely with engineers, data analysts, and product teams to improve the current database architecture and build new high-performance, scalable, and secure databases tailored to our business needs.

responsibilities :

Design, develop, and optimize highly scalable database architectures with a focus on PostgreSQL.

Lead the migration, optimization, and restructuring of existing databases to ensure efficiency and scalability.

Implement and enforce database best practices, including indexing, partitioning, query optimization, and normalization.

Define and execute high-availability and disaster recovery strategies.

Work closely with engineering teams to ensure efficient database schema design and support the development of new features.

Monitor and troubleshoot database performance, identifying and resolving bottlenecks.

Ensure data security and compliance with industry standards, implementing encryption, access control, and auditing policies.

Optimize stored procedures, triggers, and functions for maximum efficiency.

requirements-expected :

3+ years of experience as a Database Developer, focusing on PostgreSQL.

Proven expertise in designing, optimizing, and managing large-scale, high-performance databases.

Strong knowledge of AWS database services (RDS, Aurora, EC2-based PostgreSQL instances) and on-premise PostgreSQL deployments.

Experience implementing HA (High Availability) & replication strategies (e.g., Patroni, PgBouncer, Streaming Replication).

Deep understanding of query optimization, partitioning, indexing, caching, and concurrency control.

Proficiency in backup / recovery strategies and disaster recovery planning.

Hands-on experience with CI / CD pipelines and Infrastructure as Code tools like Terraform, Ansible, or AWS CloudFormation.

Proficiency in SQL, PL / pgSQL, and scripting languages like Python or Bash for automation.

Familiarity with monitoring and alerting tools (AWS CloudWatch, Prometheus, Grafana, Datadog).

Excellent English communication skills, with the ability to collaborate effectively with both technical and non-technical teams.

offered :

Meaningful work & impact - Your solutions will shape Param Group’s AI strategy and directly influence our products and internal processes.

Flexibility - Fully remote; an office is available if you’re near one of our locations.

Learning culture - Work alongside fintech experts, experiment with new tech, and keep growing.

Modern tech stack - AWS, PostgreSQL, Kafka, Airflow, dbt, Snowflake, and more.

benefits :

remote work opportunities

integration events

no dress code

coffee / tea

employee referral program

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Database Engineer • Warszawa, Masovian, Poland

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