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Cato BenjaminsenCB

Cato Benjaminsen

Freelance Software Engineer

€550/day
Berlin, DE
8-15 years

Average response time: 1 hour

About Cato

I help startups and teams build, ship, and maintain web and mobile products. I work end-to-end as a senior software engineer across frontend and backend, handling architecture, implementation, and deployment so teams can move fast.

I’ve delivered production systems both as the sole engineer and as part of established teams. That includes building new products from scratch, adding features to existing applications, and working on legacy codebases where things need to be improved.

I’m comfortable taking full technical ownership when needed, or plugging into an existing team and getting productive quickly. I care about building systems that are clear, maintainable, and actually usable.
  • English

    Native or bilingual

  • Norwegian

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Careproofed
    Freelance Software Engineer
    September 2025 - Today (9 months)
    Lead product engineer on Careproofed, working as the sole engineer on an early-stage web platform in active development.

    Designed and implemented the core application architecture using Next.js, TypeScript, and PostgreSQL, including internal data models and a recommendation algorithm. Responsible for end-to-end development and launch preparation.
    Next.js Typescript PostgreSQL
  • Zero circle
    Freelance Software Engineer
    July 2025 - Today (11 months)
    Berlin, Germany
    Sole freelance full-stack engineer on Zero Circle, a product discovery platform focused on zero-alcohol and zero-caffeine alternatives. Built and maintained the web application and internal admin tooling using Next.js, TypeScript, Prisma, TailwindCSS, and PostgreSQL.

    Delivered the public website, internal dashboards, Google Places API integrations, Stripe payments, and multilingual support. Continued light maintenance and feature development alongside other projects.
    Next.js Typescript PostgreSQL
  • Loyalties
    Founder & Lead Developer
    July 2024 - Today (1 year and 11 months)
    Berlin, Germany
    Designed, built, and launched a cross-platform digital loyalty app for small businesses.

    Built the product end-to-end using React Native, TypeScript, Ruby on Rails, PostgreSQL, Expo, and Fly.io. Implemented secure device-based authentication using JWT with public/private key signing, customer and merchant user flows, and over-the-air (OTA) updates via Expo.

    Responsible for architecture, implementation, deployment, and ongoing iteration.
    Ruby on Rails React Native Typescript PostgreSQL

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Education

  • Bachelor of Science
    Long Island University
    2014
    Bachelor of Science
  • Web Development Bootcamp – Ruby on Rails
    CareerFoundry
    2015
    Web Development Bootcamp – Ruby on Rails

Skill set

Categories