Full Stack Engineer

Reference: o16-1708516Full Stack Software Engineer – Back Office Ledger/Accounting Software London – Hybrid, 2 days per week£110,000–£130,000 + benefits Certus Recruitment is working with an ambitious UK fintech building a new regulated digital currency and payments platform.

We are looking for a Senior Software Engineer to play a key role in taking the platform from its current stage through to regulated, production-grade deployment. This is a highly hands-on engineering role, working across the application and protocol layer and building the services and core engines responsible for issuing, recording, reconciling and settling financial transactions.

The key requirement We are particularly interested in engineers who have built back-office ledger or accounting software. You should have experience developing systems where financial transactions must be recorded accurately, balances must reconcile and there is a clear, auditable record of every movement of money.

Experience could come from payments, banking, fintech, accounting platforms, custody, financial infrastructure or another environment where transactional and accounting correctness is critical. The role You will take ownership across areas including:Back-end services and transaction workflowsDouble-entry ledger and accounting systemsSettlement services and payment orchestrationEvent-sourced financial recordsReconciliation and transactional integrityCompliance and authorisation logicDatabase design and integrity controlsShared APIs and event schemasCustomer-facing and internal applicationsIntegration between traditional financial infrastructure and blockchain settlement This is very much a build role.

You will be taking architecture and design documentation and turning it into robust, auditable production software. What we're looking for5+ years' professional software engineering experienceProven experience building back-office ledger/accounting softwareStrong experience with financial transactions, reconciliation and data integrityExperience taking systems from prototype through to productionStrong back-end engineering capabilityExperience with strongly typed languagesStrong SQL/PostgreSQL knowledgeTypeScript experienceRust experience would be highly valuable, although strong engineers from other systems languages who are keen to learn Rust will be consideredExperience with event-driven architectures and transactional systemsStrong written communication and a design/documentation-led approach Experience within payments, banking, fintech, custody or digital assets would be particularly relevant.

Blockchain or stablecoin experience is not essential, but you should be interested in developing your knowledge of on-chain systems and comfortable working in a highly regulated financial environment. The opportunity This is an opportunity to join at a genuinely formative stage and help build the core financial infrastructure behind a new regulated platform.

Rather than maintaining an established product, you'll be directly involved in building the ledger, settlement and transaction infrastructure that ultimately needs to demonstrate that every movement of money is correct, reconciled and auditable. £110,000–£130,000 + benefitsHybrid – 2 days per week in London Interested? Apply directly or contact Certus Recruitment for a confidential discussion.

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