Senior Backend Engineer - Java/Kafka, Hybrid London

Wise; Greater London; Hybrid; GBP 66,000 - 106,000; Full time

Benefits offered by this job

RSUs

Wise Benefits

Job summary

Wise in London is seeking a mid-senior software engineer to design, build, and maintain high‑performance tools using Java, Kotlin, Spring Boot, and cloud technologies to support regional expansion and customer value.

Collaborate with product managers, mentor juniors, drive architectural decisions, and contribute to engineering culture. This hybrid role offers RSUs and Wise benefits within a diverse international team.

Qualifications

• Knowledge of Java and Spring Boot.
• Knowledge and experience with asynchronous messaging systems, such as Kafka.
• Experience working with relational databases, SQL query optimization, and schema design.
• A strong product mindset, prioritizing customer needs and making data-driven decisions.
• A strong sense of ownership and excellent communication skills to drive cross-team projects.
• Ability to work independently while also being a collaborative team player, frequently engaging in cross-team efforts.
• The ability to break down complex projects into incremental milestones that deliver customer value.
• Experience with common design and architectural patterns, coupled with a passion for writing clean, performant, and well-tested code.
• Curiosity and a drive for continuous learning and improvement.
• Adherence to and advocacy for best coding practices, continuous delivery, and code reviews.
• A proven track record of leading technical initiatives and mentoring other engineers.

Responsibilities

• Design, build, and maintain high-performance, scalable tools and services utilizing Java, Kotlin, Spring Boot, cloud technologies, etc.
• Build account-level features, such as tax payments or savings account products, to cater for European markets.
• Collaborate with product managers to develop business requirements and turn them into technical solutions.
• Mentor junior engineers, offering technical guidance and conducting code reviews.
• Drive architectural decisions and technical strategy for Regional Expansion Tribe.
• Contribute to our engineering culture through knowledge sharing and best practices.
• Work with the product team on customer interviews for our markets, gather quantitative and qualitative data to better understand our customers and build solutions for them.
• Document and present data-driven results to product stakeholders, explaining and proposing strategies that align with the products risk appetite and business objectives.

Skills

Java

Spring Boot

Kafka

SQL

Relational DBs

Product mindset

Ownership

Cross-team collaboration

Incremental milestones

Design patterns

Code reviews

Mentoring

Learning mindset

Job description

Wise in London is seeking a mid-senior software engineer to design, build, and maintain high‑performance tools using Java, Kotlin, Spring Boot, and cloud technologies to support regional expansion and customer value.

Collaborate with product managers, mentor juniors, drive architectural decisions, and contribute to engineering culture. This hybrid role offers RSUs and Wise benefits within a diverse international team.