Senior Software Architect helping teams build secure, scalable cloud systems

I’m a Finland-based, hands-on software architect with 15+ years of experience designing and delivering backend and cloud solutions — especially in finance, banking, payments, and other regulated domains.

I help companies when systems must be secure, scalable, compliant, and reliable,

I typically help with:

• Cloud and backend architecture on AWS

• Payment systems and financial integrations

• Authentication & authorization (OIDC, SAML2, CIAM)

• Modernizing legacy systems without breaking the business

• Designing systems that scale — and stay secure

I work hands-on with Java and Kotlin, databases, and AWS infrastructure.

Why work with me

• 15+ years of experience including finance, banking and insurance

• Senior architect roles in payment and authentication-heavy systems

• AWS certified (Solutions Architect & Security Specialty)

• Comfortable leading teams or embedding as a senior individual contributor

• Strong focus on pragmatic, maintainable solutions
  

Let’s talk

If you’re dealing with architectural complexity, security concerns, or a system that no longer scales, feel free to reach out.

LinkedIn: https://www.linkedin.com/in/sauliketola/
Mastodon: https://techhub.social/@ketola
Github: https://github.com/ketola