CareerPlan

Senior Backend Engineer - Payin Platform

London, gbFull-time2026-10-09 → 2026-11-10

Core

Design, develop, test, and maintain backend services for the Direct Debit API and Payin Platform that powers automated payments into Wise, handling high-volume transactional data and routing payments across providers.

Role type

Senior Backend Engineer (Payments)

Builds

Direct Debit API, payment orchestration system, and internal Payin Platform rails for Wise's money-movement machine.

Domain

Fintech / Payments

Required skills

Backend development, RESTful API design, SQL/PostgreSQL, Apache Kafka, event-driven architecture, payment orchestration, automated testing, code reviews, incident response, performance optimization, security best practices.

Preferred skills

Experience with cloud infrastructure (AWS), handling sensitive financial data, compliance with financial regulations.

Technologies

AWS, PostgreSQL, Apache Kafka

Responsibilities

Design and implement database schemas, build event-driven architectures, develop payment orchestration systems, write automated tests, conduct code reviews, participate in on-call rotations, resolve performance bottlenecks, ensure security compliance.

Seniority

Senior, hands-on IC