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Callback Systems

Monthly app maintenance and custom software for non-technical founders: backups, rollback and alerts

Tallinn, EstoniaFounded 2024callback.systemsWebsite technologies

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Highlights

  • Young companyFounded 2024
  • New on EvolcAdded 2026-10-27

About Callback Systems

Callback Systems builds custom software and runs a monthly managed service that keeps founders' apps stable as usage grows. The service covers backups, a separate environment for testing changes, one-click rollback, alarms for problems, and secure storage of keys and passwords. Code, infrastructure and domains are held in the client's name from day one.

Customers are founders without a technical lead in charge, including those whose products were built with AI coding tools such as Claude Code or Codex. The company sells a flat monthly subscription with no lock-in, and clients can leave in any month.

Callback Systems OÜ is registered in Tallinn, Estonia, and was founded in 2024. The founders, Diego Cattarinich and Bruno, work directly with clients; Bruno comes from 37signals, the team behind Rails. The website states that the company has shipped production software in four countries, and its stack is built on Rails, with React and Python also listed.

Product: Custom software development and a flat monthly managed service covering backups, test environments, rollback, alarms and infrastructure care.

Jobs at Callback Systems

No open positions listed right now.

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Website technologies

Older, unverified list. Detection dates and supporting evidence are not yet available.

  • Cloudflare
  • Ruby on Rails
  • Tailwind CSS