Ruby on Rails Engineer in Barcelona


55,000 - €65,000
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Job Description

At Kantox we are looking for a RoR Engineer who will make real new features and improvements in our platform to join our Tech team. The real value of Kantox is focused on the range of quality products we offer through our platform, therefore a resistant, reliable and efficient code structure is key for our business. 🚀

This is a full-time and with infinite possibilities for growth 📈. You will be joining a vibrant and passionate group of software engineers that hail from all parts of the world. 🌏

The Kantox Engineering Manifesto

Kantox is a team sport. Our engineering culture is devoid of egos yet we take great pride in our work. We believe in constructively challenging each other pushing our knowledge, code, processes to the absolute limit.

Our processes are based around continual self improvement, continuous code integration and deployment.

About the team

The Ruby team manages the core of the Kantox machinery. We are constantly evolving by improving what we have from the past, making it more solid, better performing, and well tested. We also constantly monitor our echo-system to make sure it's healthy with metrics and checkers. We also deal very often with other teams, and connect the Ruby core with many other services (Elixir, Java, ...) through RabbitMq, Redis, Webhooks, etc...

We are also updating our Rails version right now in order to be able to keep up with modern versions as they come. So if you want to be part of a very motivated team, challenging yourself constantly, with great knowledge of the Kantox core, and wanting to make it constantly better and with new features, this is for you.


Your mission within Kantox

  • You are a coding monster. You breath and dream code.
  • You love writing tests for your code.
  • You are a passionate programmer.
  • You love meta programming.
  • You are comfortable working in a dynamic and demanding environment.
  • You understand work hard, play hard, code smart.
  • You think out of the box while at the same time appreciating the value of existing approaches.
  • You are a team player and are capable of leaving your ego out of technical conversations.
  • You practice continual improvement.

Who you are

  • At least 2-4 complete years working on Ruby or Ruby on Rails projects.
  • Have a University degree in Computer Science (preferably a Masters) or equivalent
  • Advanced Ruby skills
  • Testing: you are convinced of its value and you know how to create useful, complete tests.
  • Fluent in English.
  • Appreciated: practical experience in functional programming, distributed programming, micro-services and/or concurrency.
  • Permission to work within the EU is a plus

Our culture

  • An environment of innovation, accountability, and constructive feedback
  • A diverse and multicultural team of over 40 different nationalities
  • Grow your role and build your career with our learning and development opportunities.
  • A collaborative and inclusive culture of sharing and teamwork. Build connections for life.
  • Hybrid working and flexible hours so you can work when and where you feel best
  • Some testimonials: “The culture and the people at Kantox make me want to recommend Kantox as a place to work. There is a good balance between learning and growing and support from fellow team members. I feel like the people are very welcoming and make Kantox an easy place to feel at home."

What we offer:

  • Competitive salary 💰
  • Sponsored learning budget
  • Free private health insurance
  • Free Spanish, English and French lessons
  • Relocation package if needed
  • Flexible working hours with an intensive Friday schedule
  • Hybrid work model
  • 31 days of annual vacations🌴
  • Gym discounts and free sports activities 💪🏼
  • Restaurant Ticket with monthly credit and regular cross-team lunches
  • Fresh fruit and unlimited coffee 🍇☕️
  • Pizza Fridays 🍕
  • Beautiful office with incredible 360-degree views of Barcelona ☀️


About Kantox

Kantox is a leading fintech company developing sophisticated Currency Management Automation software solutions that help companies to automate their foreign exchange processes and leverage currencies for growth.

We are a 200-person strong team, split between London and Barcelona. So far, we’ve raised over €30 million and became profitable in 2018. Thanks to our clients, we continue to grow at a fast pace. Clients in 75 countries have already exchanged more than USD $18 billion with us!

In October 2022, BNP Paribas signed an agreement for the acquisition of Kantox. Kantox will continue to operate as an independent company, now with the experience and market power of BNP Paribas behind it. The acquisition is subject to regulatory approvals and is expected to be completed in the coming months.

Our Commitment to Diversity, Equity & Inclusion

Kantox is deeply committed to diversity, equity and inclusion both in our hiring practices and in our experiences as a Kantox employee.

We’re proud to be an equal opportunity employer, and encourage all applicants regardless of race, religion, or belief (if any), color, nationality, ethnic or national origin, gender, gender identity, pregnancy and maternity, sexual orientation, age, marital and civil partnership status, or disability status.


About Kantox

  • Fintech

  • Barcelona, Spain

  • 50-70 employees

  • 2011

Kantox is a foreign exchange service provider, offering small-medium sized enterprises and mid-cap companies a comprehensive solution to their foreign exchange needs, based on transparency, efficiency and value.

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