Sr. Ruby Developer

Published on March 29, 2024

We are an early-stage start-up, based in London, with a solid product-market fit, impressive growth rates, and a user base spread across the US, Canada, Europe, and Australia. Founded in 2018, Koinly is used by thousands of cryptocurrency investors, accountants and blockchain businesses and is also the preferred tax partner for a number of leading cryptocurrency exchanges. We are building tools to enable the widespread adoption of cryptocurrency by automating the regulatory hurdles of tax compliance and asset tracking.

What you’ll be doing

As a Senior Ruby Developer, you will have a big impact in the development of Koinly. You’ll be responsible for writing clean modern code that follows best practices. We are looking for someone that is experienced in Ruby on Rails and knows other programming languages and frameworks too. Someone who is not afraid to learn new things but can hit the ground running with our core application.

You’d be working at a team that has not only the goal of creating value but also the explicit goal of being a place where developers love working at. Where we care about technical debt, adopting new technologies, but we are still pragmatic about using the right tool for the job. You will have freedom and autonomy to do your work. At Koinly there will be non-managerial growth opportunities for developers interested in technical leadership.

This role will have on-call responsibilities.

About Koinly 👇

  • One of the fastest growing Crypto Tax Calculators in the world with solid product market fit.
  • Trusted and loved: don’t take our word for it, see what our customers say
  • Used by hundreds of thousands of investors, accountants and a partner to crypto exchanges.

Our users get through their crypto taxes in 20 mins; many will save days or weeks, filing their crypto taxes for the first time giving them the confidence to build a portfolio for the long term.

Build a product that can impact the world 🌍

There are over 300m crypto users worldwide. We are building tools to enable further widespread adoption of cryptocurrency by automating the regulatory hurdles of tax compliance and asset tracking.

Come and shape the future of crypto with us

Our ambition doesn't stop there. Next, the product vision will enable Koinly to empower crypto investors to make the best decisions for their financial future.

Join a diverse team for the best work of your life 🌟

In just a few years we have gone from launching to one of the leaders in this space. Join a rewarding environment with a diverse mix of founders, crypto traders, fintech alumni, tax professionals and all round good people in creating a worldwide organisation.

You’ll thrive in this role if you have the following experience.

  • 5+ years of experience
  • Experience with Ruby and Rails
  • Experience with SQL databases and knowledge of NoSQL ones
  • Proficiency in at least 3 programming languages
  • Computer science knowledge, gained through a degree or self-taught
  • Good written and verbal communication skills in English
  • Experience with Git and Github.

What We Can Offer You

💰Competitive package

🏡This job is fully remote

🚀Work within one of the most rapidly growing industries in the world


Don’t ‘tick all of the boxes? Neither do we

We are driven by hiring not only by experience and relevance for the role but also by ambition. We celebrate anything ‘outside of the box’, so if you don’t meet all of the listed tickbox criteria, please do still apply as we’d love to hear from you.

Here’s our take on Diversity, Inclusion and Belonging

The diversity of our team reflects the diversity of our community and customers. We not only welcome, but celebrate, diverse communities. We feel we have an empowering environment where everyone is supported and respected, and we want you to feel this too. We welcome new ideas, thinking and approaches and listen intently, and we are strongly committed to learning and improving on this as we grow.