Senior Backend Engineer (Payments Connector & Adapter Layer)

We are an international broker. Our clients fund and withdraw through roughly 60 payment methods across Asia, Africa, LATAM, and the Middle East.

Payments is now a standalone function, and we are building the team around it.

We are looking for a Senior Backend Engineer who will own our connector layer and everything downstream of it: building a canonical adapter layer so that providers plug in rather than get built one by one, moving payment methods to server-to-server and embedded flows, and making transaction status reliable and observable across the estate.

You will also be the payments function's technical counterpart to the orchestration platform team: the behavior we need from the platform is specified here, argued here, and reviewed here.

Your Responsibilities:

• Building and owning the connector and adapter layer, so that adding or replacing a provider becomes configuration and a thin adapter rather than a new integration each time
• Migrating payment methods from redirect flows to server-to-server and embedded flows where the provider supports it, and measuring the result
• Owning everything downstream of the orchestration layer: reconciliation, transaction status handling on our side, method configuration, and payment flows into the client portal
• Making transaction status reliable end-to-end, through active status polling, idempotent processing, and reconciliation
• Building observability over transaction status and provider performance across the estate
• Specifying the behavior we need from the orchestration platform: transaction state machine, idempotency, polling, routing, and cascading rules. You design it, argue for it, and review what comes back
• Supporting integration work for our card program
• Extending the same integration set to acquired entities as configuration rather than a new build each time

Requirements:

• 5+ years in backend engineering, strong in TypeScript, Node.js, comfortable in relational databases
• Production experience with payment systems: authorization, callbacks, refunds, reconciliation, and retry behavior
• 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

Significant pluses:

• 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, and 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 program 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 modeling
• Final interview with senior stakeholder

Benefits:

Fixed monthly compensation of [based on experience]

Fully remote work within GMT to GMT+4, with no relocation required

Ownership of the connector layer and everything downstream, with direct influence on what the orchestration platform becomes

Engineering problems that are not CRUD: asynchronous status across dozens of providers, partial failure, and local payment rails in emerging markets

Scope that grows with the business: a card program, new entities, and new payment products

Corporate AI tooling as part of the working process