Senior Software Engineer - Wise Platform - API Experience

Overview

In this role you design, build, and maintain scalable backend services that power Wise’s public APIs used by banks, software companies, and enterprises. You will set API standards, develop developer-friendly tools, and guide best practices across teams to simplify integration for partners.

You’ll mentor engineers, participate in domain modeling, and collaborate with product and partner teams to shape technical solutions. Expect work across global engineering hubs and influence API architecture and security at scale.

This is a high-impact role at the intersection of fintech, APIs, and developer experience.

Responsibilities

• Architect, build, and maintain scalable backend services using Java, Spring Boot, Kafka, and PostgreSQL in an event-driven microservices setup
• Set API standards (RESTful, OpenAPI/Swagger, OAuth2) and develop SDKs and reference implementations to reduce partner integration complexity
• Provide technical leadership, code reviews, and mentorship across the team with domain modeling (DDD)
• Collaborate with Product Managers, Implementation Managers, Solutions Engineers, and partner teams to define features and influence product strategy
• Work across frontend and infrastructure stacks to align decentralized teams with API standards and architecture patterns
• Travel to engineering hubs globally (e.g., Tallinn) to collaborate and align on technology direction

Key requirements

• Public API design, build, and maintenance experience (RESTful, OpenAPI/Swagger, OAuth2)
• Strong backend with Java and Spring Boot for microservices
• Experience with event-driven architectures (Kafka or similar) and relational databases (PostgreSQL/MySQL)
• Knowledge of DDD, microservices patterns, high availability, and low latency
• Product-minded engineering with focus on usability, cost efficiency, and stakeholder communication
• Effective communication and collaboration across technical and non-technical stakeholders
• collaboration
• communication
• customer-centric mindset
• Java
• Spring Boot
• Kafka

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