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Backend Engineer

Dan Zajdband

Dan Zajdband

LinkedIn ↗

I'm Dan, a Software engineer working at :Daffy from Colombia.

In 2021 we started building both a team of talented and kind people and a product to help people be more generous, more often. In September, we launched our MVP that involved working with multiple teams and partners to do things like integrations with Payment processors, Crypto and Fiat custodians and banks, building an investment platform to manage and grow our user's contributions, building a payments system and a donations distribution mechanism, creating the platform that supports our mobile and web apps, and much more. I contributed code to our Backend, Web app, iOS app, and even some experiments in VR.

It's been a fantastic journey, but it's just the beginning. As we grow and develop new ideas to build a product and a community of members, we want to welcome more great people to the team with different backgrounds and fresh ideas to make our vision a reality. Join us in this rare opportunity to work on cutting-edge technology to make the world a better place.

About you:

  • Mission-driven and excited to bring Daffy’s vision to a reality
  • Growth mindset & coachable (open to learn even if you don’t know something)
  • Ability to work independently and cross-functionally
  • Eager to collaborate with others and work on a distributed team
  • Experimental mindset, willing to test new ideas quickly


  • 1-4 years of industry experience building Backend features, preferably in Kotlin or Java.
  • Experience working with SQL Databases
  • Experience writing APIs

Bonus points:

  • Experience with Dropwizard
  • Experience with PostgreSQL
  • Experience with financial product integrations
  • Experience building web APIs with Ruby on Rails
  • Ability to build web features with React


  • You’ll be primarily responsible for building features for our Backend written in Kotlin using PostgreSQL and Dropwizard
  • Own what you build through the entire process, from working with different teams on initial specs to implementation and launch
  • Write tests and documentation to make features you work on easy to maintain
  • Build delight features and experiences