> Markdown version of [/jobs/ext/2990541-software-engineer-fintech-l1](https://www.wearedevelopers.com/jobs/ext/2990541-software-engineer-fintech-l1). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer - Fintech (L1) - **Company:** Katanox - **Location:** Amsterdam, Netherlands (Remote available) - **Experience:** Experienced - **Salary:** €3,750.0 - €5,000.0 - **Contract:** Internship / Graduate position - **Skills:** Java (Programming Language), Audit Trail, Code Review, Data Integrity, Data Structures, Kotlin - **Published:** September 19, 2026 - **Apply:** https://www.adzuna.nl/details/5889606920 ## About the Role * Around zero to two years of professional experience, or a strong internship and side-project record. A degree is welcome but not required. * Solid fundamentals: data structures, algorithms, testing, and enough system design to reason about a service boundary. * Working knowledge of Kotlin or Java, or another typed language and a clear interest in Kotlin. * Care for correctness and detail. You would rather write the test that proves the totals balance than assume they do. * Curiosity about how money actually moves. No finance background needed, we will teach you double-entry accounting, payouts, and what KYC is for. * Fluent in English, and based in or around Amsterdam. ## Description Katanox is building the infrastructure layer for hospitality: software that connects hotels and travel buyers and moves money between them. Our platform brings distribution and payments into one workflow (contracting, connectivity, reconciliation, and settlement), so partners can operate with less fragmentation and fewer manual handoffs. For engineers, this means building reliable systems that handle complex B2B workflows and real financial constraints, with a focus on data integrity, auditability, security, and operational excellence. We're headquartered in Amsterdam with hubs in London and New York. You'll join the Techuity team, which owns the finance domain at Katanox: the systems that work out who gets paid what, move the money, and prove afterwards that it was done correctly. Every reservation on the platform becomes a set of accounting entries, a fee, a payout to a hotel, and a record an auditor or a regulator can check. Our accounting, billing, payment, and KYC services are what make that happen. Money code is unforgiving in a way most software is not. A rounding error or an event processed twice is not a cosmetic bug, it is someone's money in the wrong place, and the fix has to be traceable. That constraint is also what makes the domain a good place to learn: you get fast, honest feedback on whether your code is correct. This is an L1 role. We expect you to arrive with solid fundamentals and real curiosity, not years of production experience. You will pair with senior engineers, own small pieces end to end from your first weeks, and grow into owning a service yourself. * Build and extend our Kotlin finance services: accounting entries, fee and invoice calculation, payouts, and the KYC checks that verify the companies we pay, with tests and code review. * Work on event-driven flows where a reservation turns into a payment, an accounting journal, and an invoice as events pass between services, and every step has to be repeatable and correct. * Ship features to the internal backoffice our finance and compliance colleagues use daily to review KYC cases and check the books. * Own your services in production: when a payout does not land or a journal does not balance, you trace the event, fix the cause, and add the check that catches it next time. * Owning one of the finance services end to end, from design to rollout. * The harder correctness problems: idempotency, reconciliation, and audit trails that still hold up years after the fact. * Weighing in on architecture decisions with the senior engineers you pair with. ## Related Videos - [Resilient by Design: Building Robust Architectures in High-Stakes Financial Systems](https://www.wearedevelopers.com/videos/2106-resilient-by-design-building-robust-architectures-in-high-stakes-financial-systems) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Are Code Reviews Worth It? Insights from 16 Years of Review Data](https://www.wearedevelopers.com/videos/1135-are-code-reviews-worth-it-insights-from-16-years-of-review-data) - [Moving from Java to Kotlin](https://www.wearedevelopers.com/videos/384-moving-from-java-to-kotlin) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [How to Find Tech Jobs in Amsterdam](https://www.wearedevelopers.com/magazine/279-how-to-find-tech-jobs-in-amsterdam) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Software Developer Salary in The Netherlands [2023]](https://www.wearedevelopers.com/magazine/217-software-developer-salary-in-the-netherlands-2023) - [The Netherlands – Europe’s powerhouse for software development?](https://www.wearedevelopers.com/magazine/31-the-netherlands-europe-s-powerhouse-for-software-development) - [The Best Tech Hubs in Europe: 5 Best Cities For Software Engineers](https://www.wearedevelopers.com/magazine/246-the-best-tech-hubs-in-europe-5-best-cities-for-software-engineers)