Cards, Payments & Financial Systems

Cards, Payments & Financial Systems

Engineering, integration and evolution of card management systems, payment processing and transactional systems that cannot go down.

Talk to our specialists

We build, integrate and evolve technology for the financial ecosystem, combining specialised engineering, business knowledge and innovation for card and payment operations.

  • Card Management Systems
  • Card administration and lifecycle
  • Cards & Payments Engineering
  • Payment Processing
  • Financial systems integration
  • Payment platform evolution
  • Banking systems modernisation
  • Financial process automation
  • Transactional systems engineering
  • Critical application support
Let’s evolve your cards and payments operation
Customer / CardholderThe transaction starts in an experience that has to be instant.Bank / IssuerProduct, limits, credit and risk.Card Management SystemCard lifecycle, parameters, billing.Payment ProcessingAuthorisation, capture, settlement and reconciliation.Payment Network / IntegrationsNetworks, partners and ecosystem services.Merchant / TransactionThe sale approved and correctly reconciled.cross-cutting layersengineering · integration · security · monitoring

Illustrative diagram. Bitwise works on the engineering, integration and evolution of the highlighted systems — it does not operate payment networks or third party regulatory functions.

Cards and payments services

Technology, operations and risk
as a single agenda.

Technical consulting for critical payment products, operations and platforms — from strategy through to supporting what is already in production.

StrategyScheme arrangements, settlement rules, product roadmap and a read on regulatory risk.
EngineeringCapture, authorisation, financial schedule, reconciliation and integration between systems.
OperationsMission critical support, performance, antifraud and continuous evolution.
  • Acquiring
  • Multi-scheme processing
  • Card Management Systems
  • Reconciliation
  • Financial schedule and settlement
  • Antifraud
  • Payments legacy and mainframe
  • Scheme integrations
  • Mission critical support
  • Platform modernisation

Cases

What we have done in high volume operations.

Acquiring

Multi-scheme transformation

The challenge. A large financial institution needed to process multiple card schemes, each with its own settlement and reconciliation rules, without interrupting a high volume legacy operation.

What we did. Mapped the rules and their impact on capture, authorisation and the financial schedule; parameterised by arrangement; ran integrated testing and safe coexistence between new and legacy.

Authorised resultZero downtime during the transition. Regulatory compliance and commercial expansion preserved.

Time-to-data

Bringing sales data forward

The challenge. The batch window consolidated sales from 5pm to 5pm. Transactions between 5pm and midnight only appeared the next day, driving dissatisfaction and support tickets.

What we did. Reviewed the legacy architecture, redefined closing and accounting, restructured the batch chain and integrated capture with statements.

Authorised resultEvening sales visible the same day. More transparency in the financial schedule.

Financial flow integrity

When the close does not match,
where did the difference start?

Traceability and controls along the transaction flow, so a discrepancy stops being an investigation and becomes a query.

A transaction crosses systems, files, rules and processing windows before it becomes a financial obligation and a settlement. When a difference appears between stages, the final balance does not explain its origin on its own. We map a critical flow, define control points, check integrity and organise how exceptions are handled.

When this conversation makes sense

  • Differences show up at closing and require manual cross-checking between systems
  • Teams struggle to explain where a transaction or an amount changed
  • Reprocessing, duplicates or delays drive recurring investigation
  • Reconciliation exists, but controls between the stages feeding the result do not

The control layers

IdentityRelate the transaction across sources through agreed identifiers and matching rules, preserving the reference to origin and processing.
CompletenessIdentify expected records that never arrived, records without a match and duplicates. Handle resends and reprocessing.
Amount and ruleCheck gross and net amounts, instalments, fees, refunds and chargebacks. Separate a rule difference from a data difference.
Time and statusAccount for movement date, settlement date, cut-off and transaction status, with tolerance for events that arrive at different moments.
ExceptionsRecord the evidence, classify materiality, route it to the owner and follow the resolution, keeping a history of decisions.

How we start

1Integrity diagnosticMap of the flow, sources, control points and business rules. Inventory of known discrepancies and a pilot proposal, with responsibilities and acceptance criteria.
2Pilot in parallelIntegration of the agreed sources, checking rules, evidence and exception routing — running alongside the current process, without touching payments.
3Operation and expansionNew flows and rules, exception follow-up and evolution of the controls. A recurring model defined by scope, volume and service level.

Any block or action on payments requires its own scope, homologation and client approval. The pilot starts with read access and alerts, running in parallel with the current process.

Let’s look at your flow

How we work

From strategy to production.
From complexity to results.

Five stages that exist to get software into production — not to produce documentation.

  1. DiscoverWe understand the business, the architecture and the real operational challenges.
  2. StrategizeWe identify opportunities and set priorities by value and risk.
  3. EngineerWe design and build the solutions with real engineering.
  4. IntegrateWe connect the solutions to the company’s actual environment.
  5. EvolveWe measure, optimise and keep improving what runs in production.

Other practices

Bitwise does not solve just one problem.

AI & Agentic Transformation

See the practice

Mainframe, Legacy & Modernization

See the practice

Data & AI Engineering

See the practice

Software Engineering & Digital Products

See the practice

Contact

Let’s talk about your company’s challenges.

Tell us the problem. We answer with a technical point of view, not with a corporate deck.

  • Is your company ready for the agentic shift?
  • Find out how to modernise your technology infrastructure.
  • Let’s find cost reduction opportunities together.

We use your details only to reply to this message.