Senior Backend Engineer-Payments

• 5+ years in backend engineering, strong in TypeScript, Node.js, comfortable in relational databases
• Production experience with payment systems: authorisation, callbacks, refunds, reconciliation and retry behaviour
• Practical understanding of idempotency, asynchronous status handling, transaction state machines and designing for partial failure. This is the core of the role rather than a detail, and you will both build against it and specify it
• Experience integrating third-party APIs of uneven quality, including working directly with a provider's integration team to resolve what the documentation does not answer
• The ability to own a service rather than close tickets: architecture decisions, standards and root cause fixes
• English and Russian at a working communicative level

Will be a significant plus:

• Exposure to .NET for work touching the client portal
• Experience with APM and local rails in Asia, Africa or LATAM rather than cards alone
• Experience with bank transfer rails, virtual accounts, QR-based methods, mobile money etc.
• Event-driven patterns in production: transactional outbox, idempotent consumers, sagas
• Background in brokerage, crypto payments, orchestration or another high-volume payments environment; on the provider side, at a PSP, gateway or payment company
• Active use of AI tooling in daily work
• Ability to work independently and make decisions without constant oversight
• Proactive mindset: willingness to propose improvements, fixes, new approaches
• What the first year looks like.
• In the first months you take over the integration codebase with a documented handover, strengthen transaction status handling, and ship your first server-to-server integration.
• By mid-year the adapter layer is in place, new providers go live against it rather than as one-off builds, and transaction status and provider performance are observable across the estate.
• In the second half the migration to server-to-server and embedded flows runs as a programme across methods, and the same integration set starts extending to our other entities. As the team grows, a Systems Analyst takes over instrumentation and verification while integration engineering stays with you.

Recruitment process:

• HR interview, covering background, motivation and fit
• Technical interview on backend engineering and the payments domain
• Home task as a case from the real needs
• System design and problem-solving interview, covering integration design, failure handling and status modelling
• Final interview with senior stakeholder.