Senior Backend Engineer

Klar; Deutschland; Remote; EUR 85,000 - 120,000; Full time

Benefits offered by this job

Stock options

Health insurance & Pension scheme

26 days paid vacation

Training budget

MacBook Pro

Berlin office

Mental health support

Job summary

Klar is seeking a backend engineer to join the investment team and own the full lifecycle of savings accounts and the investment platform. This is a full-time remote opportunity for candidates based in Germany.

You will work with Java (21+)/Kotlin, SpringBoot 4, and a Kafka-based microservices architecture, delivering high-throughput, auditable financial systems across a distributed ecosystem.

Qualifications

• Solid backend software development experience.
• Microservices, event-driven architectures, REST APIs.
• Relational databases (PostgreSQL preferred), transactions and concurrency.
• Continuous delivery with test-driven development (ATDD), or willingness to learn and adapt.
• Nice-to-have: experience in financial systems.
• Nice-to-have: observability stacks.

Responsibilities

• Manage multiple microservices and supporting libraries in an event-driven architecture powered by Kafka.
• Oversee full lifecycle of savings accounts, campaigns, and the investment platform.
• Ensure high-throughput, auditable financial-grade systems.
• Collaborate with other teams and maintain integration with broader microservices ecosystem.

Skills

Backend development

Microservices

Event-driven architecture

REST APIs

Tools

Java/Kotlin

SpringBoot 4

Hibernate

Flyway

Protobuf

PostgreSQL

Kafka

AWS S3

GitHub Actions

Prometheus

Grafana

JUnit 5

AssertJ

Mockito/MockK

Testcontainers

Karate

Checkstyle/ktlint

Job description

We're turning one of the world's largest underbanked markets into something fairer, simpler, and more transparent. 7 million users served since 2019. Uber's first global credit card, built right here in Mexico and Berlin. Klar Empresarial, a brand-new B2B solution bringing agile credit and smart accounts to SMEs who've been ignored by traditional banks for too long.

And a full banking license on the horizon, because our customers asked for it and we listened.

We move fast, we think big, and we go all in, because as our CEO puts it: "Growing doesn't always mean going further. Sometimes it means going deeper."

Behind all of it is a team of 30+ nationalities, working across Mexico City, Berlin, and Argentina, obsessed with building financial products that are simpler, faster, and fairer than anything that came before.

This is Klar, and we're seeking the people who'll write the next chapter.

Our people

If you join us at Klar, you’ll be welcomed to a team that is rich in many talents and we are very proud! With our head office in Mexico City, and remote tech hubs in Berlin and Argentina, we are always learning something new about another culture or language. With so many people from different backgrounds and walks of life (young professionals, parents, LGBTQ+, neurodivergence), you’ll definitely find your people here!

Our values

• Ownership - We own our successes & our failures as a team.
• Excellence - We do everything to the best of our ability & always seek to achieve a new level of excellence in our work.
• Inclusion - We believe we are stronger together and actively work to promote a safe, diverse, inclusive, and respectful culture.
• Customer Obsession - We understand the value Klar can bring to its customers & it’s always at the forefront of our decisions.
• Klarity - We communicate clearly & with authenticity. It’s in our name & it’s what we do.

About the role

This is a full-time remote opportunity for candidates based in Germany.

As part of the investment team, you will manage multiple microservices and supporting library projects in our event-driven microservices architecture powered by Kafka. You will be responsible for the full lifecycle of savings accounts, campaigns (rewards), and the entire investment platform, taxation, etc.

You will work on financial-grade, high-throughput systems that must be correct and auditable, while integrating with a broader ecosystem of microservices managed by other teams.

• Java (21+)/Kotlin, SpringBoot 4, Hibernate, Flyway, Protobuf
• Postgres, Kafka, AWS S3, Github Actions, Prometheus, Grafana
• JUnit 5, AssertJ, Mockito/MockK, Testcontainers, Karate
• Checkstyle/ktlint

What you can expect:

• A small and efficient cross-functional team dedicated to high engineering standards. As our project portfolio expands, we offer an engaging work atmosphere packed with continuous learning opportunities.
• AI-first development with human oversight and pair development and review.
• A continuous delivery environment with its principles and standards.

What we are looking for:

Must-have:

• Solid backend software development experience.

Strong proficiency in:

Microservices, event-driven architectures, REST APIs

• Relational databases (PostgreSQL preferred), transactions and concurrency, maintaining large, high-traffic tables.
• Continuous delivery with test-driven development (ATDD), or willingness to learn and adapt.

Nice-to-have:

• Experience in financial systems
• Experience with observability stacks

Our offer to you:

• Competitive salary based on performance and experience
• Chance of earning Klar stock options
• 26 days of paid vacation per year
• MacBook Pro
• Wellhub subscription to support mental and physical health
• Sponsored coaching and therapy sessions via a Mental Health platform
• Training budget to upskill your learning
• Health insurance & Pension scheme
• BVG Corporate ticket
• Berlin office if you prefer to work onsite
• International work environment with amazing and highly skilled people
• A world-class team that helps you evolve in areas you're interested in

Klar is a safe place for everyone!

We trust our highly skilled and diverse team and we’re committed to creating a welcoming and inclusive environment for new talents to flourish. We value diversity and welcome all applications regardless of gender, nationality, ethnic and social origin, religion/belief, physical abilities, age, sexual orientation and identity.

Should you require any accommodations through the recruitment process, please don’t hesitate to let us know how we can help!