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Marcin Adamczyk
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13+ years building working software.

I’m Marcin Adamczyk, a senior software engineer with experience across startups, larger companies, payments, SaaS and AI products.

Describe what you need

Ownership

Senior ownership where it matters.

Projects often begin with an undefined idea, an important change to an existing product or difficult work that needs attention. I can take responsibility for delivery, working independently or directly with your team.

Selected experience

Experience across payments, SaaS, startups and AI.

  • GLOBAL PAYMENTS

    Worked on international treasury and merchant payout systems.

  • EUROPEAN SAAS PLATFORM

    Built accounts, subscriptions and access across several products and markets.

  • US STARTUP

    Delivered new features and improved an existing product.

  • EARLY AI PRODUCT

    Built AI-powered product features before they became common.

Technical strengths

  • Ruby on Rails
  • /Backend development
  • /System integrations

What needs to work?

A rough description is enough. You’ll get a personal reply with the next useful step.

Describe what you need