# Senior Software Engineer - Rules Platform at Wise

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Build and evolve the Rules Platform: imp

- **Company:** Wise (https://jobs.trythestack.co/companies/wise)
- **Location:** Estonia
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Java, Kotlin, JVM, Kafka, SQL, Distributed Systems, Backend Engineering, System Design, Data Consistency, Platform Reliability, Internal Libraries, Spring Boot, Technical Decision-Making, Mentoring, Product Mindset, Risk Assessment
- **Posted by employer:** 2026-11-04
- **Added to The Stack:** 2026-11-05
- **Listed until:** 2027-01-03
- **Status:** Active
- **Apply:** https://jobs.smartrecruiters.com/Wise/744000159595669-senior-software-engineer-rules-platform (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-software-engineer-rules-platform-wise-ce8a8bad

## About the role

Responsibilities:
- Build and evolve the Rules Platform: implement reliable, scalable backend services and reusable internal libraries.
- Drive architecture and system design decisions for distributed systems where reliability and data consistency are critical.
- Monitor SLOs, identify bottlenecks and drive performance and reliability improvements.
- Collaborate with Product and other engineering teams to prioritise needs and improve platform usability.
- Own end-to-end initiatives from problem definition through implementation and delivery.
- Contribute to code reviews, technical discussions and mentorship to raise engineering quality.

Requirements:
- ~5 years of hands-on experience with JVM languages (Java or Kotlin) and backend systems.
- Experience with Kafka, SQL/databases and distributed systems where consistency matters.
- History of building or maintaining shared libraries or platform components used by multiple teams.
- Strong system design, trade-off analysis and technical decision-making skills.
- Product-oriented mindset, effective cross-team communication and mentoring experience.
- Familiarity with Spring Boot and experience in fintech or regulated environments is advantageous.

## Responsibilities

Build and evolve the Rules Platform, including scalable backend services and reusable internal libraries, while driving architecture decisions and improving performance, reliability, and data consistency. Collaborate with product and engineering teams, own initiatives through delivery, and contribute to engineering quality through technical discussions, code reviews, and mentoring.

## Requirements

Requires around five years of hands-on experience with JVM languages such as Java or Kotlin, complex backend systems, Kafka, SQL databases, and distributed systems. Candidates should also have experience with shared libraries, system design, technical decision-making, cross-team collaboration, and mentoring; Spring Boot and experience in fintech, financial crime, risk, or regulated environments are advantageous.

## FAQ

- **Is this Senior Software Engineer - Rules Platform role still open?** It was posted on 2026-11-04 and is listed as active on The Stack. Confirm on Wise's application page before applying.
- **Does Wise offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Wise's site.
- **Where is this role located?** The listing gives the location as Estonia. It is marked on-site.
- **What skills does this role ask for?** The listing names: Java, Kotlin, JVM, Kafka, SQL, Distributed Systems, Backend Engineering, System Design, Data Consistency, Platform Reliability, Internal Libraries, Spring Boot, Technical Decision-Making, Mentoring, Product Mindset, Risk Assessment.

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## Notes for agents

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