When a bank or a fintech says it wants a digital bank for individuals, the conversation usually starts with the app. Which design, which features, iOS or Android first. The app matters. It is also only the part customers see.
Behind every screen there is a stack of systems. They decide how fast you can launch, how safe your customers are and how much it costs to change anything later. This guide walks through the five layers, so you know what to ask before you pick a partner.
The app is the smallest part of a digital bank
A banking app shows a balance, lets people move money and freeze a card. Every one of those actions calls something underneath: the ledger that holds the balance, the card system that blocks the card, the security layer that checks who is asking.
If those layers are slow or rigid, the best app in the world cannot fix it. A feature that looks small on screen can take months because it touches three systems owned by three teams.
Layer 1: accounts and the ledger
The ledger is the book of record. It stores every account, every balance and every movement. Three things matter here.
- Speed. Balances and payments should update as they happen, not after an overnight run.
- Currencies. If your customers earn or spend in more than one currency, multi-currency should be built in, not added later.
- Flexibility. How easily can you create a new account type, a new limit or a new fee rule without a code release?
The ledger is also where most launch delays hide, because every other layer depends on it.
Layer 2: cards
For many customers, the card is the bank. A card programme under your own brand means choosing the card scheme, the design, the controls customers get in the app and how fast a lost card can be blocked.
Do not only ask how a card is issued. Ask what the card does for your customer in the first week, and how quickly you can change its rules once real people are using it.
Layer 3: onboarding and checks
Opening an account is the first test of your product. The customer has to prove who they are, answer regulatory questions and pass checks, ideally in one flow that works on a phone.
A good onboarding flow brings identity, the questionnaire and KYC together, and runs AML screening in the same place. Every extra screen, email or manual review is a place where a customer can give up, and a place where your team spends time.
Layer 4: security and access
Strong customer authentication, multi-factor login, roles and permissions for your staff, records of customer consent and audit logs are not features customers notice. Regulators and auditors notice them.
If this layer is built into the platform, you inherit it. If it is added afterwards, every new product repeats the work.
Layer 5: connections to the outside world
A digital bank does not live alone. It connects to payment networks, to other banks and to third-party apps. Open banking connectivity lets customers share account data or start payments with providers they trust, under rules that are about to change with PSD3.
The practical question is how many separate integrations you will have to maintain. One universal API is easier to live with than ten.
Build, buy or partner
You have three realistic routes.
- Build everything yourself. Full control, but it takes years and a large team, and you carry every layer.
- Buy one closed platform. Faster to start, but you may be locked in and paying for modules you do not need.
- Assemble modular layers. Take only the layers you need, from a provider whose modules work together.
Be1B is a technology provider with modular layers for banks and fintechs. Regulated activities run through licensed partners.
Questions to ask before you choose
- Which of the five layers do we already have, and which are we missing?
- How long does it take to change a rule, a fee or a limit, and who has to be involved?
- How many steps does a customer take from first tap to first transaction?
- What happens to our data and our customers if we change provider?
- Which parts run through licensed partners, and who is responsible for what?
Frequently asked questions
Can a fintech without a banking licence launch a digital bank? Regulated activities such as holding deposits need a licence. Fintechs usually work with a licensed partner. With Be1B, the regulated parts run through licensed partners.
How long does it take to launch? It depends on your scope, your regulators and your partners. Be wary of anyone who gives a fixed number before they have seen your plan. Ask for a plan with milestones instead.
Can we start with one layer and add the rest later? Yes. That is the point of modular layers. You take what you need now and add the rest when you are ready.
Can we customise the product and the brand? A white-label approach means customers see your brand, your design and your product rules, not ours.
If you are a bank or a fintech planning a digital bank for individuals, see how Be1B works for banks or for fintechs, or book 30 minutes and we will go through your five layers together.