Altostratus and AWS Drive Digital Transformation in the Energy Sector
In a context of accelerated growth and international expansion, one of the main renewable energy companies in the Spanish market opted for a cloud-first strategy to modernize its technological infrastructure.
With operations in key markets such as Spain, Italy, Japan, the United States, Chile, Australia, and Mexico, the company needed a scalable, secure, and efficient platform to support its evolution.
With the support of Altostratus, part of Telefónica Tech, it undertook an ambitious migration project to AWS, optimizing costs and ensuring maximum performance and security.
From traditional infrastructure to an agile and secure cloud
The company operated with an infrastructure hosted by an external provider, whose service had reached the end of its useful life. This situation presented multiple challenges:
- Lack of flexibility and scalability to support business growth and geographic expansion.
- High operational complexity, with fragmented management between hosting and on-premises environments at different locations.
- Security and compliance risks due to dependence on shared services and a decentralized infrastructure.
- Cost inefficiencies, with high operational expenses in storage, networking, and hardware maintenance.
Aware of the complexity of these challenges, the company relied on Altostratus to define and implement a cloud strategy tailored to its specific needs.

The solution: a cloud-first ecosystem with AWS technology
With the goal of ensuring maximum performance and security, a strategic approach was implemented to optimize operations and reduce complexity, integrating AWS best practices:
- Simplified management with AWS Control Tower and AWS Organizations for centralized and secure administration of cloud resources.
- Seamless connectivity, ensuring smooth communication across all business areas with AWS Transit Gateway and secure VPN.
- Resource optimization, migrating servers to Amazon EC2 and databases to Amazon RDS to improve performance and reduce costs.
- Intelligent automation, managing infrastructure with Terraform and AWS CloudFormation for efficient deployments.
- Maximum security and control, applying data encryption and network segmentation for enhanced protection.
Results: efficiency, security, and cost savings
The impact of the migration to AWS was significant, providing key improvements in performance, security, and business profitability. Thanks to a well-defined and executed cloud-first strategy, the company was able to optimize its resources and reduce costs without compromising operational stability:
- 23% cost reduction compared to the previous infrastructure.
- Increased operational efficiency, with provisioning times reduced from weeks to minutes.
- Strengthened security with advanced IAM policies and continuous auditing.
- High availability and improved performance, thanks to multi-AZ deployments and latency optimization with AWS Global Accelerator.
Towards a secure and efficient digital future
Beyond the migration, the company continues to evolve its cloud strategy to drive growth and optimize operations.
With AWS and Altostratus as strategic partners, it continues to adopt advanced solutions that strengthen security, improve performance, and ensure an infrastructure ready to face the challenges of the digital future.