Senior Backend Engineer – Payments

About the role

We are an international broker building a dedicated Payments function that supports around 60 payment methods across Asia, Africa, LATAM and the Middle East. As a Senior Backend Engineer you will own the connector and adapter layer, drive migration to server‑to‑server flows and ensure reliable, observable transaction status across the estate.

Key responsibilities

• Design, build and maintain a canonical adapter layer so new providers are added via configuration and thin adapters.
• Migrate payment methods from redirect to server‑to‑server and embedded flows, measuring impact.
• Own downstream processes: reconciliation, transaction status handling, method configuration and client‑portal flows.
• Make transaction status reliable end‑to‑end using active polling, idempotent processing and reconciliation.
• Implement observability for transaction status and provider performance.
• Specify and review orchestration platform behaviour (state machine, idempotency, routing, cascading).

Required profile

• 5+ years of backend engineering experience, strong in TypeScript and Node.js.
• Production experience with payment systems (authorisation, callbacks, refunds, reconciliation, retry logic).
• Deep understanding of idempotency, asynchronous status handling and transaction state machines.
• Experience integrating third‑party APIs of varying quality and working directly with provider teams.
• Ability to own services end‑to‑end, make architecture decisions and fix root causes.
• Working communicative level in English and Russian.

Required skills

• TypeScript
• Node.js
• Relational databases
• Payment system integration (authorisation, refunds, reconciliation)
• Idempotency handling
• Asynchronous status handling
• Transaction state machine design
• Third‑party API integration
• .NET (optional)
• APM tools
• Event‑driven patterns (transactional outbox, sagas)

What we offer

• Fixed monthly compensation based on experience.
• Fully remote work within GMT to GMT+4.
• Ownership of the connector layer with direct influence on the orchestration platform.
• Complex engineering problems beyond CRUD, involving asynchronous status across many providers.
• Scope that grows with the business: card programme, new entities and payment products.
• Corporate AI tooling integrated into daily workflow.