Senior Backend Engineer, Public APIs & Platforms

Wise; Greater London; On-site; GBP 88,000 - 111,000; Full time

Benefits offered by this job

RSUs

Global benefits

Job summary

Wise is seeking an experienced Backend Architect to design and build scalable public APIs and backend services. You will own API standards, drive architectural decisions, and mentor engineers across a global team.

The role requires strong Java/Spring Boot expertise, experience with event-driven systems, and a customer-focused mindset to balance performance, security, and cost. Expect collaboration across product, implementation, and partner teams.

Qualifications

• Proven track record in designing, building, and maintaining production-grade public APIs (REST/OpenAPI).
• Strong backend Java/Spring Boot experience for resilient microservices.
• Experience with event-driven architecture (Kafka) and relational DBs (PostgreSQL).
• Knowledge of domain-driven design (DDD) and microservices patterns.
• Customer-focused engineering with cost awareness and strong collaboration.

Responsibilities

• Architect, build and maintain scalable backend services using Java, Spring Boot, Kafka and PostgreSQL.
• Set API standards and create developer-friendly tools and references to ease partner integration.
• Mentor engineers, conduct code reviews, and promote engineering best practices.
• Collaborate with product and partner teams to shape features and technical solutions.
• Align decentralized teams with API standards and architecture patterns across Wise.
• Travel as needed to engineering hubs (e.g., Tallinn).

Skills

Public API design

Java

Spring Boot

Event-driven systems

DDD

Microservices

OpenAPI/Swagger

OAuth2

PostgreSQL

Security & compliance

Communication

Tools

OpenAPI/Swagger

OAuth2

Job description

Wise is seeking an experienced Backend Architect to design and build scalable public APIs and backend services. You will own API standards, drive architectural decisions, and mentor engineers across a global team.

The role requires strong Java/Spring Boot expertise, experience with event-driven systems, and a customer-focused mindset to balance performance, security, and cost. Expect collaboration across product, implementation, and partner teams.