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Modern banking journeys without ripping out your core

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We put an API layer around legacy core banking, digitise onboarding and lending, and automate the reconciliations and RBI returns your teams still assemble by hand.

Parts list

  1. Core banking API gateway
  2. Digital account onboarding
  3. Loan origination modernisation
  4. Reconciliation automation
  5. Regulatory reporting pipelines
  6. Collections digitisation
Project
Banking & Financial Services
Discipline
Digital transformation
Drawn by
Nexzem engineering
Scale
Not to scale

Where banks and NBFCs lose time today

A typical co-operative bank or mid-sized NBFC runs a core system that is reliable but closed. Account opening still needs a branch visit and photocopies, loan files travel between credit and operations as PDFs on email, and the finance team spends the first week of every month reconciling settlement files from payment partners. New products wait months because every change touches the core.

Regulation is moving faster than these systems. RBI's KYC Master Direction permits Video-based Customer Identification, the Account Aggregator framework makes consented bank statement data available in minutes, digital lending rules demand key fact statements and direct disbursal to borrower accounts, and the 2023 IT Governance direction expects board-level oversight of technology risk. Card data also falls under PCI DSS.

Nexzem uses a strangler approach: we expose the core through a secure API gateway, build new digital journeys on top, and shift functions away from the legacy stack only when the new path has proven itself. Every release is designed with your CISO and compliance team, with audit trails and data localisation built in.

Banking & Financial Services, drawn as a phased roadmap

Workstreams down, phases across. An illustrative sequence; your roadmap is set after the first audit.

Ph 1

Ph 2

Ph 3

Ph 4

Ph 5

  1. Core banking API gateway
    Phases 1 to 2
  2. Digital account onboarding
    Phases 1 to 2
  3. Loan origination modernisation
    Phases 2 to 2
  4. Reconciliation automation
    Phases 2 to 3
  5. Regulatory reporting pipelines
    Phases 3 to 4
  6. Collections digitisation
    Phases 3 to 3
  7. Fraud and AML monitoring
    Phases 4 to 5
  8. Credit risk analytics
    Phases 5 to 5
  1. Ph 1

    Regulatory and system baseline

    We map every product journey, system touchpoint and applicable RBI direction before proposing any change.

  2. Ph 2

    API enablement

    The core is wrapped with a gateway, security policies and monitoring so new channels can be built safely.

  3. Ph 3

    Journey rebuild

    Onboarding, lending or collections journeys are redesigned and shipped one at a time with compliance sign-off.

  4. Ph 4

    Back-office automation

    Reconciliation, reporting and case management move from spreadsheets to governed pipelines.

  5. Ph 5

    Analytics and decisioning

    With data flowing cleanly, we add credit, fraud and portfolio models that feed back into the journeys.

Banking & financial services transformation initiatives

Wrap legacy core banking with APIs, digitise onboarding and lending, and automate RBI reporting for banks and NBFCs.

  1. 01

    Core banking API gateway

    A secured middleware layer exposing accounts, deposits and loan functions as versioned APIs, so mobile apps and partners connect without direct changes to the legacy core.

  2. 02

    Digital account onboarding

    Aadhaar OTP e-KYC, CKYC lookup, PAN verification and Video KYC with liveness checks and geo-tagging, producing a complete audit trail for every opened account.

  3. 03

    Loan origination modernisation

    Rule-driven LOS replacing email-based credit files, with bureau pulls, Account Aggregator statements, key fact statements and e-sign agreements in one workflow.

  4. 04

    Reconciliation automation

    Matching engines for UPI, card, NACH and payment gateway settlement files against ledger entries, flagging breaks for operations instead of manual spreadsheet ticking.

  5. 05

    Regulatory reporting pipelines

    Data marts that generate RBI returns, CRILC and bureau submission files from source systems with validation checks, version history and maker-checker approvals.

  6. 06

    Collections digitisation

    Field collection apps with receipt generation, payment links and AI calling reminders through NexCall, prioritised by delinquency bucket and promise-to-pay history.

  7. 07

    Fraud and AML monitoring

    Transaction monitoring rules plus anomaly models that score unusual patterns, mule accounts and rapid fund movement, with case management for investigators.

  8. 08

    Credit risk analytics

    Underwriting scorecards and early warning signals built from bureau, cash-flow and repayment data, with explainable outputs credit committees can review.

Why choose Nexzem for banking & financial services transformation

  • R-01

    New products faster

    Products are configured in the digital layer and released without waiting on core system change windows.

  • R-02

    Branch-free onboarding

    Customers open accounts and apply for loans remotely while you keep a complete regulatory evidence trail.

  • R-03

    Cleaner month-end

    Automated reconciliations and validated reporting replace the manual compilation that delays closing.

  • R-04

    Controls you can show

    Maker-checker flows, immutable logs and access reviews give auditors and inspectors clear evidence.

  • R-05

    Lower legacy risk

    The strangler approach retires old functions gradually, avoiding a risky single-weekend core migration.

How banking & financial services transformation unfolds, phase by phase

Sheet P-01, delivery sequence

Clear stages with a review at the end of each, so you always know what happens next and what it costs.

  1. S1

    Regulatory and system baseline

    We map every product journey, system touchpoint and applicable RBI direction before proposing any change.

  2. S2

    API enablement

    The core is wrapped with a gateway, security policies and monitoring so new channels can be built safely.

  3. S3

    Journey rebuild

    Onboarding, lending or collections journeys are redesigned and shipped one at a time with compliance sign-off.

  4. S4

    Back-office automation

    Reconciliation, reporting and case management move from spreadsheets to governed pipelines.

  5. S5

    Analytics and decisioning

    With data flowing cleanly, we add credit, fraud and portfolio models that feed back into the journeys.

Banking & financial services transformation in practice

  • Detail A

    Digital onboarding for an NBFC

    An NBFC replaces paper applications with digital onboarding using video KYC, document extraction and bank statement analysis, cutting the time from application to disbursement and reducing branch workload and paper storage significantly.

  • Detail B

    API layer for a co-operative bank

    A co-operative bank exposes balance, transfer and account services from its core through a secure API layer, enabling a modern mobile app and UPI integration without changing the core system itself.

  • Detail C

    Automated reconciliation

    A lender's operations team stops matching bank statements, gateway settlements and loan ledgers in spreadsheets, as automated rules match most entries daily and flag exceptions for review with full audit trails.

  • Detail D

    Regulatory reporting pipeline

    A bank builds data pipelines that collect figures from source systems, validate them and generate regulatory returns consistently, replacing manual compilation that previously consumed days of work each reporting cycle.

Digital Transformation for Banking & Financial Services, in depth

Sheet N-01, general notes

N1

Where legacy systems hold banks back

Core banking systems are reliable but often old, with batch processing, limited APIs and customization that only the vendor can do. Around them, banks and NBFCs accumulate separate systems for loans, collections, KYC, reporting and channels, connected by file transfers and manual reconciliation. Launching a new product or partner integration can take months because every change touches several fragile systems at once.

The cost shows up as slow onboarding, loan turnaround measured in days, operations teams reconciling spreadsheets, and regulatory reports assembled by hand. Fintech competitors without legacy systems set customer expectations for instant decisions and digital service, raising pressure on traditional institutions. Our banking and financial services industry page describes the channel layer most banks modernize first. Replacing the core is a large, risky program that few institutions undertake lightly. Most modernize around it, exposing core functions through secure APIs and building modern journeys on top.

  • N1.aPaper-heavy onboarding and KYC.
  • N1.bLoan decisions delayed by manual document checks.
  • N1.cDaily reconciliation done in spreadsheets.
  • N1.dRegulatory returns compiled by hand from many systems.
  • N1.ePartner and fintech integrations that take months.
N2

A phased banking transformation roadmap

The first phase builds an API gateway or integration layer in front of the core, with security, logging and rate limits that satisfy information security teams and auditors. Digital onboarding with video KYC and digital loan journeys usually come next, since they deliver visible customer and revenue benefits. Operations improvements such as reconciliation automation and collections digitization reduce cost and risk in parallel.

Later phases address data: regulatory reporting pipelines, fraud and AML monitoring, and credit risk analytics built on consistent data rather than extracts. Each phase must respect RBI directions on IT governance and outsourcing, data localization for payment data and cyber incident reporting timelines; this is general information, not legal advice. Our Java development services support the integration work many banks run on JVM platforms.

  • N2.aPhase 1: API layer in front of the core banking system.
  • N2.bPhase 2: digital onboarding and loan origination.
  • N2.cPhase 3: reconciliation and collections automation.
  • N2.dPhase 4: regulatory reporting and data pipelines.
  • N2.ePhase 5: fraud, AML and credit risk analytics.
N3

Measuring banking transformation progress

Good measures connect technology changes to customer and operational outcomes. Time to open an account or disburse a loan, application drop-off rates, the share of customers onboarded fully digitally and manual reconciliation hours are clear indicators. Risk measures matter equally, such as fraud losses, audit findings and incidents per release. Report these measures to the steering committee alongside delivery progress, and agree targets per phase. Measurable gains help justify continued investment and show regulators that digital change is controlled and well governed.

  • N3.aAccount opening and loan turnaround times.
  • N3.bDigital onboarding completion rate.
  • N3.cManual reconciliation hours per month.
  • N3.dTime to produce regulatory returns.
  • N3.eFraud losses and false positive rates.
  • N3.fAudit findings and change-related incidents.

Technology for banking & financial services transformation

Proven, well-supported tools chosen for your scale, budget and team, never for novelty.

  • Java
  • Spring Boot
  • React
  • Kotlin
  • PostgreSQL
  • Kafka
  • Redis
  • Kubernetes
  • Python
  • Grafana

Banking & financial services transformation FAQs

Something else on your mind? Ask a consultant and get a reply within one business day.

Can you work with our existing core banking system?

Yes. We integrate with the core through its available interfaces, whether that is a vendor API, database views, message queues or batch files. The goal is to stop new development inside the core, not to replace it on day one.

How do you address RBI expectations on outsourcing and data?

We design for data localisation of payment data, follow your outsourcing policy, support vendor risk assessments and give your auditors access to logs and documentation. Hosting is chosen with your CISO, on your premises or an India region cloud.

What determines the cost of a banking transformation?

Cost depends on how many journeys you modernise, the integration effort with your core and payment partners, security and audit requirements, and whether you need analytics models. We provide a phased fixed quote after a free consultation.

How long does a Video KYC or digital lending rollout take?

A Video KYC onboarding journey or a digital LOS for one loan product typically takes 12-20 weeks including security testing and compliance review. Additional products reuse the same platform and go faster.

Do you handle security testing?

We run code reviews, dependency scanning and penetration testing before release, and we support your own or third-party audits. Findings are fixed and retested as part of the engagement.

Can digital transformation happen without replacing our core banking system?

Yes. Most institutions modernize around the core by adding an integration layer and building new digital journeys, operations automation and data platforms on top. Core replacement can be considered later, when the surrounding architecture makes it less risky.

How do you work with our information security and audit teams?

We involve them from the start: sharing architecture and controls, aligning with internal policies, supporting security testing and audits, and documenting changes. Early involvement avoids late surprises that delay go-live and builds confidence in every phase.

We work with clients across the USA, UK, Australia, UAE, New Zealand and India.

Where we work

Start with a clear roadmap.

Share where your systems and processes stand today. We reply within one business day with a suggested first phase.