Senior Product Engineer - Partner

Company Description

Wise is a global technology company, building the best way to move and manage the world's money. Min fees. Max ease. Full speed.

Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money.

As part of our team, you will be helping us create an entirely new network for the world's money. For everyone, everywhere.

We are looking for a Senior Backend Engineer to join our Partner Experience team in London. The Partner Experience team builds and runs the systems that let enterprise partners go live faster and manage their day-to-day operations in one place. We own the Partner Portal and backend services behind partner onboarding, permissions, and communication. Most of what we build is new, so you'll be designing systems from scratch more often than maintaining existing ones.

We are a small team that ships frequently and iterates on real partner feedback. Engineers own features from technical discovery and design through to production support. We work closely with our PM and designer to understand partner needs, and with adjacent teams to pull their capabilities into the portal.

We investigate before we build, managing ambiguity, understanding existing systems, APIs and dependencies before writing code. We keep process light: quick standups, focused 1:1s, and quarterly planning.

• Backend microservices for partner-facing features: fraud reporting, case management, RFI handling, audit logging, and transaction visibility.
• The permissions and role‑based access control system that governs what partners can do in the portal.
• SSO (SAML 2.0) integration for enterprise partners, including solving identity mapping between partner systems and Wise.
• The communication layer services between Wise and partners, extending them to handle new case types and workflows.
• API design for partner-facing endpoints. Consistency, documentation, and usability without hand‑holding.
• Work with Fin Crime, Compliance, and KYC teams to bring sanctions RFI workflows and fraud reporting into the portal.
• Technical discovery: mapping existing systems, evaluating dependencies, producing design documents that become the team's source of truth.
• Production support and debugging when live partner issues come up.

• Experience designing, building, and deploying backend microservices in Java and Spring Boot.
• Familiarity with domain‑driven design, event‑driven architecture, and microservices patterns.
• Experience designing and maintaining RESTful APIs commercially. Comfort with OpenAPI/Swagger, OAuth2, and versioning strategies.
• Ability to design and maintain relational databases (MySQL, PostgreSQL), including query performance, indexing, and data modelling.
• Enjoy mapping complex technical landscapes and writing clear documentation.
• Deliver reliably and manage own work without constant check‑ins.
• Work well with adjacent teams, unblock yourself when dependencies come up, and build relationships that go beyond PR reviews.
• Understand what large enterprise customers need from software: reliability, auditability, compliance, and security as design constraints.

• Experience building enterprise portals, partner platforms, or B2B SaaS products.
• Understanding of payments systems and the complexities of cross‑border money movement.
• Experience with identity and access management (SAML, SSO, SPIFFE, OAuth2).
• Familiarity with Kafka or other event streaming platforms.
• Experience in a platform team serving multiple internal or external consumers.
• Ability to explain technical decisions to non‑technical people.
• Interest in international finance, foreign exchange, or payments infrastructure.

• Starting salary: £87,500 – £111,000 + RSUs.
• Wise Benefits (healthcare, pension, etc.).