Case Studies

FinTech Platform · Relevant engineering experience

Disaster recovery in under 30 minutes for a fintech platform

Problem

A large enterprise application serving global fintech customers had no fast, repeatable way to rebuild its infrastructure after a failure. Recovery depended on manual steps and took far too long.

What was done

• Containerized one of the company's largest enterprise applications
• Wrote the whole environment in Terraform so it can be rebuilt from code
• Built secure CI/CD pipelines with automated image builds, deployment checks and rollback
• Ran regular backup, restore and recovery tests

Result

Infrastructure recovery time dropped to under 30 minutes, and releases became safer with automatic rollback.

• Docker
• Terraform
• GitLab CI/CD
• Linux

FinTech & SaaS Platform · Relevant engineering experience

Three-location database replication with encrypted traffic

Problem

Self-hosted PostgreSQL and MongoDB databases ran in one place. A single outage could stop the platform, and traffic between the app and the databases needed stronger protection.

What was done

• Set up PostgreSQL and MongoDB replication across three geographically separate locations
• Encrypted all app-to-database traffic with TLS 1.3
• Applied CIS Benchmarks to the database servers to reduce the attack surface
• Tested restores and failover as part of disaster recovery planning

Result

Continuous data sync, high availability and disaster recovery readiness, with every connection encrypted.

• PostgreSQL
• MongoDB
• TLS 1.3
• CIS Benchmarks

SaaS Platform · Relevant engineering experience

Hybrid AWS + Hetzner infrastructure for cost and availability

Problem

Running everything on AWS was expensive for steady workloads, but the team still needed AWS for scaling and managed services.

What was done

• Designed a hybrid architecture: steady workloads on Hetzner, elastic and managed services on AWS
• Connected both with secure networking, firewalls and VPN
• Hardened every server to CIS Benchmarks and added monitoring and alerting
• Automated provisioning with Terraform and Ansible

Result

Lower running costs for steady workloads while keeping AWS where it adds value, with high availability across both.

• AWS
• Hetzner
• Terraform
• Ansible