[ Built for the reconciliation at 2am, not just the happy path ]
In FinTech the hard part is not the happy path. It is the reconciliation at 2am when a gateway timed out after debiting the customer, the idempotency key that stopped a double charge, the audit trail a regulator will ask for eighteen months from now. Techtaru Digital is a FinTech software development company built for those cases — delivering custom fintech software development across payment platforms, digital wallets, lending systems, neobank and mobile banking products.
In FinTech the hard part is not the happy path. It is the reconciliation at 2am when a gateway timed out after debiting the customer, the idempotency key that stopped a double charge, the audit trail a regulator will ask for eighteen months from now. Techtaru Digital is a FinTech software development company built for those cases — delivering custom fintech software development across payment platforms, digital wallets, lending systems, neobank and mobile banking products.
Bring us your product concept and target market and we will return a ledger model, a compliance map and a phased build planregulated financial products engineered around a correct ledger and a documented compliance surface.
end-to-end delivery from concept and licensing map through launch and scale.
ledgers, transaction engines, reconciliation services and settlement pipelines.
PSPs, core banking, bureaus, KYC, AML and open banking providers.
migrating legacy financial systems incrementally without interrupting money movement.
threat modelling, penetration test remediation, PCI scope reduction and regulator-facing documentation.
Card, UPI, ACH and SEPA rails, tokenisation, smart retries, refunds, chargebacks, settlement files and automated reconciliation. Payment software development is where most FinTech projects either hold together or quietly leak money.
Balances backed by a double-entry ledger, KYC tiers, P2P transfers, top-ups, cashback and offers, and dispute handling with full transaction lineage.
Customer onboarding with video KYC, accounts and sub-accounts, card issuance, statements, savings goals and BaaS partner orchestration.
Secure authentication, device binding, transaction limits, biometric login, in-app service requests and accessibility-compliant interfaces.
Application capture, bureau pulls, configurable underwriting rules, disbursal, EMI scheduling, collections and delinquency workflows.
Corridor pricing, FX handling, sanctions and PEP screening, payout partner orchestration and remittance compliance reporting.
Custody provider integration, on and off-ramp flows, wallet connectivity and compliance screening on chain activity.
Velocity rules, device fingerprinting, behavioural signals, sanctions screening and analyst case management with audit history.
Portfolio dashboards, SIP and goal flows, policy management, claims intake and advisor tooling.
ledger design, licensing and regulatory map, integration inventory, threat model.
data flow diagrams, key management, access control, PCI scope boundary.
sprints against PSP test rails from day one, with feature flags on every money-moving path.
run new flows in parallel against production traffic before cutover, reconciling daily.
real-time transaction monitoring, alerting, and documentation prepared for auditors and regulators.
Backend: Java Spring Boot, .NET, Node.js, Go for transaction services. Data: PostgreSQL with strict transactional guarantees, Kafka for event streaming, Redis for idempotency and rate limiting. Mobile: Swift, Kotlin, React Native with certificate pinning and jailbreak detection. Integrations: Stripe, Razorpay, Cashfree, PayU, NPCI-approved partners, Plaid, core banking APIs, CIBIL and Experian, Onfido and Hyperverge for KYC. Security: HSM or KMS key management, mTLS between services, SAST and dependency scanning in CI, secrets vaulting. Cloud: AWS or Azure with data residency configured per regulator. Deployment and hardening run through our secure cloud and DevOps practice.
Build a double-entry ledger, not a balance column. This is the most consequential decision in a FinTech build. A balance field updated in place cannot answer "why is this number what it is" and cannot survive a partial failure. An append-only double-entry ledger with immutable journal entries delivers reconciliation, dispute resolution and auditability by construction. Retrofitting one into a live wallet is a migration nobody enjoys.
Card data drags PCI DSS scope with it. PCI DSS v4.0 is the operative standard. The cheapest architecture keeps cardholder data out of your systems entirely — hosted fields, tokenisation and a PSP-run vault — which reduces assessment scope dramatically. We design for scope minimisation by default.
Regional rules shape the product, not just the paperwork. In India, RBI rules on card tokenisation, recurring e-mandates and data localisation change your flows directly, and UPI integration runs through NPCI-approved partners. In the EU and UK, PSD2 requires strong customer authentication and open banking access. In the US you face state money transmitter licensing, BSA/AML obligations and Reg E. All of it affects sprint scope, so we map it in discovery.
Design for failure. Idempotency keys on every mutating call, deduplication for exactly-once semantics, webhook replay handling and automated reconciliation against PSP settlement files. These separate a demo from a payments system.
Fixed scope for defined modules; dedicated squads for platform programmes; embedded engineers for banks with in-house teams.
Indicative cost: a wallet or payment MVP typically starts around $35,000–$80,000. Licensing, AML tooling and core banking integration are the main multipliers. Timelines: wallet or payment MVP, 12–18 weeks; lending platform with underwriting and collections, 4–7 months; neobank programmes are phased.
The right FinTech software development partner talks about your ledger and your regulator before your roadmap. Bring us your product concept and target market and we will return a ledger model, a compliance map and a phased build plan.
If cardholder data touches your systems, yes. Most products avoid the heaviest scope using hosted fields and PSP tokenisation so raw card data never reaches your servers. We will tell you honestly which tier applies.
Let’s talk about your fintech project. No obligation, just a conversation.
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