Senior Software Engineer II - Payin Platform - Backend (Java)

Wise
London
Workplace: HybridFull timeGBP 111,000 - 145,000 annuallyFunction: Software EngineeringExperience: 5+ yearsSkills: ["Cross-team communication","Code quality","Testable code","Code review","Product mindset"]

Join the Payin Platform team to build the Payin Session and Payment abstractions that enable Wise products to integrate payment methods once and scale to millions of transactions. You’ll design reliable, high-volume systems used across multiple product teams, with strong focus on correctness, thoughtful API design, and maintainable, testable code using modern Java ecosystem tooling.

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Wise
Wise
1 month ago

Senior Software Engineer II - Payin Platform - Backend (Java)

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Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 11 hours agoStatus: Live

Job Summary

Join the Payin Platform team to build the Payin Session and Payment abstractions that enable Wise products to integrate payment methods once and scale to millions of transactions. You’ll design reliable, high-volume systems used across multiple product teams, with strong focus on correctness, thoughtful API design, and maintainable, testable code using modern Java ecosystem tooling.
Location: London
Workplace: Hybrid
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Build Payin Session and Payment abstractions that let products integrate payment methods once.
  • •Design high-volume, high-leverage platform services used by many teams across Wise.
  • •Ensure correctness and reliability while scaling to millions of transactions.
  • •Create and evolve thoughtful APIs that enable integrations across payment methods.
  • •Write and maintain testable code using unit and integration testing practices.

Pay and Benefits

Salary: GBP 111,000 - 145,000 annually
Equity and Bonus:Equity

Key Requirements

  • •5+ years of experience with Java, Kotlin, Python, or Go.
  • •Strong experience with Spring framework and relational databases.
  • •Experience building distributed and concurrent systems, including Kafka.
  • •Experience writing testable code and using unit and integration testing strategies.
  • •Strong coding best practices, including code reviews, open feedback, and end-to-end ownership.
Experience:5+ yearsFinancial servicesDistributed systems
Skills:Cross-team communicationCode qualityTestable codeCode reviewProduct mindset
Languages:English
Tech Stack:JavaKotlinPythonGoSpringKafkaRelational databasesUnit testingIntegration testingAPI design

Company Brief

Wise
Wise (formerly TransferWise) is a London-based fintech that provides low-cost international money transfers, multi-currency accounts and payment infrastructure for individuals and businesses worldwide.
Industry: Payments
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: London, United Kingdom
Founded: 2011
Glassdoor
Glassdoor: 3.8
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