Senior Backend Engineer-Payments

About this role

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 behaviour we need from the platform is specified here, argued here and reviewed here.
Your responsibilities will be:

• 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 behaviour 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 programme

• 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: 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.

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 programme, new entities and new payment products
Corporate AI tooling as part of the working process
Originally posted on Himalayas