Senior API Platform Engineer — Java/Spring, OAuth2 & Scale

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

Benefits offered by this job

Wise Benefits

Job summary

Wise is recruiting for an API Experience Engineer to design and scale backend services using Java, Spring Boot, and Kafka. You will own API standards, contribute SDKs and reference implementations, and mentor engineers across Wise.

You will collaborate with product and implementation teams to shape features, drive a developer-first approach, and ensure secure, scalable integrations for international partners. Local candidates in London preferred.

Qualifications

• Public API design, development, and maintenance experience (RESTful, OpenAPI/Swagger, OAuth2).
• Strong Java and Spring Boot background for microservices.
• Event-driven architecture experience with Kafka and relational DB design/optimization.
• DDD, microservices patterns, high availability and low latency focus.

Responsibilities

• Design, architect, and maintain scalable backend services using Java, Spring Boot, Kafka, and PostgreSQL.
• Own API standards and developer tools to streamline integrations for partners.
• Provide technical leadership, code reviews, and mentorship across the team.
• Collaborate with PMs and partner teams to define features and solutions.
• Help align decentralized teams with API standards across Wise.
• Travel to engineering hubs including Tallinn when needed.

Skills

Public API Experience

Core Backend Stack

Distributed Systems & Data

Architectural Knowledge

Product Mindset

Communication & Collaboration

Job description

Wise is recruiting for an API Experience Engineer to design and scale backend services using Java, Spring Boot, and Kafka. You will own API standards, contribute SDKs and reference implementations, and mentor engineers across Wise.

You will collaborate with product and implementation teams to shape features, drive a developer-first approach, and ensure secure, scalable integrations for international partners. Local candidates in London preferred.