Wise

Senior Full Stack Developer

Wise
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19 hours ago
Tallinn, EstoniaSenior

Responsibilities

  • Build and operate real-time systems for fraud and scam prevention through transfer and profile decisioning.
  • Own the technical roadmap, system design, RFCs, delivery, and long-term operation of key fraud prevention projects.
  • Improve the latency, reliability, scalability, observability, security, and decision quality of the risk decisioning platform.
  • Address technical debt, manage risk within appetite, and apply engineering best practices involving Kafka, databases, and testing.
  • Lead incident resolution and post-incident reviews.
  • Mentor and coach engineers, support onboarding, conduct interviews, and share knowledge across the team.
  • Collaborate with Product, Data Science, Fraud Operations, and Analytics to balance fraud protection with customer experience.

Requirements

  • Strong experience building and operating production systems using Java/JVM, with expert-level technical expertise.
  • Solid understanding of distributed systems and event-driven architectures, including Kafka or similar technologies.
  • Experience designing low-latency, highly available, scalable systems and well-documented API-first interfaces.
  • Track record of contributing significantly to large, impactful projects and owning their technical direction from design through long-term operation.
  • Experience taking accountability for system reliability, security, and observability.
  • Ability to explain customer problems, expected impact, and product tradeoffs.
  • Experience mentoring and coaching engineers through code reviews, design discussions, and engineering best practices.
  • Excellent communication and cross-functional collaboration skills.
  • Preferred experience with Python, machine learning concepts, deploying models in production, or working with large language models in production.

Benefits

  • Monthly compensation of EUR 5750 - EUR 7083.33.
  • Work with an international, diverse, equitable, and inclusive team based in the Fraud Risk organization in Budapest and Tallinn.

Categories

Wise

About Wise

10,000+ employees

Wise builds a cross-border payments and multi-currency account used by individuals and businesses to send, receive, hold, and spend money in 40+ currencies. Revenue comes from transfer and account fees, card interchange, and enterprise partnerships via Wise Platform, which lets banks and large companies embed its international payments. Founded in 2011 as TransferWise, Wise is a London-headquartered public company.

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