Senior Kotlin Developer - Backend

Introducing Masabi 

// At Masabi, we’re driving the fare payment revolution, powering the journeys of millions all over the world. We build fare collection platforms that allow riders to seamlessly buy and present tickets for public transport either on their mobile phones, from a ticket machine, or even by tapping their bank card to travel. 

Our Justride platform is used in over 250 locations globally, including some of the largest cities in the world. With our industry-first mobile ticketing SDK, we’ve partnered with large players in the transport space, including Uber, Moovit and Transit. 

Your own journey is important to us too. Choosing a role here means joining a network of innovators from all walks of life; a group of passionate individuals who consistently deliver. Here, you’ll find the tools you need to build the career you want. Whether you’re taking the direct route or trying a new path, we’ll support you no matter what. 

The Role

As a Backend Kotlin Developer at Masabi, you will be responsible for building new features across multiple backend services that are central to our systems. We strive to create an enjoyable and rewarding environment for making great products. Our teams are self-organizing, using scrum, kanban, or a hybrid approach tailored to meet their goals effectively. Each team comprises specialists in development, testing, and sometimes hardware, working collaboratively to deliver excellent business outcomes for our customers. As we expand our fare engine calculations and architecture, this role enables developers to work with diverse technologies and programming paradigms, on complex and interesting challenges.

We also host hack days a few times a year. These events are primarily for fun, learning, and prototyping cool and innovative ideas that could benefit our customers. 

Location

// This role is available in a fully remote model ONLY for candidates based in Spain.

Our Stack

// We don’t expect you to know the whole of our stack. We want the stack to keep evolving as developers identify new tools and frameworks.

• Kotlin & Java

• REST

• Git / Gradle / Maven / Artifactory

• Amazon tech (DynamoDB, EC2, S3, SQS, Kinesis, etc)

• Kafka

• Spock/Groovy used for testing 

• Fully cloud-hosted platform with Infrastructure as Code tooling(Terraform)

About You 

• A good command of the English language is required for this role, including the ability to communicate clearly and effectively in both written and spoken English

• Experience in Kotlin development for backend

• Solid core programming skills in Kotlin and the ability to quickly pick up new technologies and domains

• Desire to implement quality software that operates at scale

• Ability to operate as part of a team that owns their piece of software and advise on the best shape of a new feature

• Open to adopting well-supported ideas and solutions, demonstrating a productive approach towards governance

• Excellent interpersonal skills to foster positive relationships with colleagues and contribute effectively to team goals

• A proactive and driven mindset to ensure projects are completed efficiently and effectively

Some of our benefits

• 23 days holiday per year plus the Christmas Shutdown (another 3-4 days)

• Private healthcare 

• Up to €1000 training budget per year

• €200 to spend on your home office

• Choice of workstation

• Menopause support 

• Ability to work for up to 3 months per year from any country in the world. Certain limitations may apply.

Careers at Masabi are for people going places - driven by a mission to make transit fair and accessible for all.

We are a network of innovators from all walks of life, passionate about making a difference. At Masabi, we operate with openness and trust, creating an environment where everyone feels empowered to bring their whole, authentic selves to work.

Whoever you are, just be yourself.

We welcome applications from underrepresented backgrounds and encourage you to share your pronouns at any stage. Together, we simplify journeys, remove barriers, and improve daily life for millions.

Why Join Masabi?

• Driven by Purpose – We believe travel should be effortless. The work isn’t always easy, but the best things never are.

• Encouraged to Accelerate – Masabi is growing, and our people drive their own development. Whether you’re taking the direct route or exploring new paths, we support your journey.

• Advancing with Empathy – We put people first and foster a culture of learning, not blame. No matter your cargo, we share the load.

We’re already powering journeys - are you ready to join us?