
FinTech and Payment Software Development

Payment platforms · wallets and accounts · KYC/KYB · provider integrations
Relevant FinTech experience
What we build
We build payment platforms, wallets and accounts, card and transfer workflows, onboarding with KYC/KYB, operations backoffices, reporting and provider integrations. Scope and controls follow the product, markets and regulated partners involved.
Transaction integrity
Financial workflows require explicit state machines, idempotent commands, duplicate prevention, immutable audit evidence, reconciliation and defined handling for timeouts, retries and partial provider failures. We design these controls around the actual movement of money and ownership of state.
Security and compliance-supporting engineering
We implement authentication, least-privilege roles, audit trails, encryption, secrets management and sensitive-data boundaries that support the client’s required controls. Legal and compliance requirements are determined by the client’s jurisdictions, licensed entities and regulated partners; engineering does not replace legal certification.
Delivery stack
Our delivery stack combines Angular interfaces, NestJS APIs and services, and Microsoft Azure infrastructure. See our PayChip, Paylance and Bonum 24 work for relevant product flows.
Ways to work with us
New product team: take a defined financial product from discovery to controlled launch.
Integration or modernization project: replace a provider or improve a specific workflow, architecture or operational constraint.
Senior team extension: add experienced engineering ownership to an existing product team.
- /01Financial flow discoveryMap users, roles, movement of money, markets, providers, state ownership, controls and expected outcomes.
- /02Architecture and provider boundariesDefine state machines, data and trust boundaries, integration contracts, audit evidence and failure handling.
- /03Controlled implementation and QADeliver small slices and test permissions, transaction states, reconciliation, duplicates, timeouts and provider failures.
- /04Launch and operational supportPrepare monitoring, access, runbooks and recovery; then operate and improve using production evidence.







