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Carl Saks

@carlsaks

Software Engineer at Bigbank who led a Java 17 and Spring Boot 3 migration and cut regulatory report generation from an hour to 20 minutes.

Estonia

Message

At Bigbank, I worked on internal tools for payments, asset management, regulatory reports, and web applications for accountants and end customers.

I led the team's Spring Boot 2 to 3 and Java 8 to 17 migration, contributing to a shared logging library and running a company-wide session on lessons learned. I also responded to production incidents and resolved failures in mandatory regulatory reports.

By rewriting SQL and addressing inefficient joins and missing indexes, I cut report generation time from about an hour to about 20 minutes. I studied Computer Science at University of Tartu, and my interest in software began with C++ CLI programs.

Experience

Work history, roles, and key accomplishments

Software Engineer

Bigbank

Mar 2022 - Apr 2026 (4 years 1 month)

End-to-end development, maintenance and improvement of internal tooling — payments, assets, reports, and an internal web app for accountants and end customers.

- Led the team's first Spring Boot 2→3 and Java 8→17 migration — contributed directly to a cross-team logging library to unblock the rollout, established the approach adopted across the team's remaining services, and ran a company-wide s

Electrician

Eesti Energia

Jun 2018 - Jul 2019 (1 year 1 month)

Worked on a variety of electrical installation projects, including residential, commercial, and solar energy systems. Tasks included installing and maintaining wiring, electrical panels, and home appliances, as well as the setup of solar parks.

Gained hands-on experience with electrical safety standards, troubleshooting, and teamwork in field environments. This role fortified my foundations in pr