Digital Wallet Development Services

We build the ledger, transaction engine, compliance layer, and card infrastructure your wallet product needs — so you can focus on the product experience, not the plumbing.

Ledger-firstDouble-entry core
Multi-railFX, SWIFT & cards
Day-oneKYC & AML built in

Alfabolt stepped in and took over support of our digital platform and internal systems, They quickly ramped up and were not only able to significantly improve our functionality, but saved us 50% on our hosting and infrastructure costs! After just a few short months they are a completely integrated part of our team!

Julie Zimmer

Julie Zimmer

Chief Executive Officer - LuckyTruck

What impressed us most about Alfabolt was their unwavering commitment to meeting all deadlines and their outstanding communication. They consistently delivered on time, which greatly contributed to the smooth progression of our project. Their clear, proactive communication ensured that we were always on the same page, making the entire development process efficient and stress-free. This level of dedication and responsiveness truly set Alfabolt apart.

Maiuran Loganathan

Maiuran Loganathan

Chief Executive Officer - Pine

Good, reliable developers who care about your project as much as you do are extremely hard to find. Alfabolt provides you with a team of such developers. They are very professional and always take the time and energy to do what's best for the project. I've really enjoyed working with them and know it won't be the last time.

Melanie Aronson

Melanie Aronson

CEO - Panion

We were impressed with their response times and knowledge, especially from their senior developer that we hired.

Daniel Tovesson

Daniel Tovesson

CTO - Bej Technologies AB

What we build for wallet teams

Building a digital wallet is not a single engineering task. It is a system of interconnected layers: a ledger that records every movement of money, a transaction engine that processes transfers in real time, an identity layer that keeps you compliant, and a card infrastructure if your product issues virtual or physical cards. Most teams underestimate how tightly these layers depend on each other, and how expensive it is to retrofit compliance or multi-currency support after the fact. We design and build all of it, in the right order, from the start.

Ledger architecture and transaction engine

The ledger is the financial source of truth for your wallet. Every credit, debit, fee, reversal, and settlement lives here. We design double-entry ledger systems that are immutable, auditable, and built to handle concurrent transactions without race conditions or balance inconsistencies. On top of that sits the transaction engine — the logic that processes transfers, applies fees, handles currency conversions, and routes settlements to the right accounts.

  • Double-entry ledger design with full audit trail
  • Real-time balance updates with idempotent transaction processing
  • Fee engine: percentage fees, flat fees, tiered structures
  • Settlement workflows for merchant payouts and inter-account transfers
  • Reconciliation tooling so operations teams can close books cleanly

Multi-currency and cross-border support

If your wallet operates across currencies or geographies, the complexity multiplies. Exchange rate management, currency conversion logic, and cross-border settlement each introduce new failure modes. We have built multi-currency wallets that handle real-time FX conversion, separate currency ledgers per user, and cross-border transfer infrastructure compliant with the jurisdictions you operate in.

  • Separate ledger accounts per currency per user
  • Real-time FX conversion with configurable rate sources
  • Cross-border transfer flows with SWIFT, local rails, or partner networks
  • Regulatory controls per jurisdiction (UAE, UK, EU, US)

KYC and compliance built in from day one

Compliance is not something you bolt on after launch. We integrate identity verification, AML monitoring, and transaction screening directly into the wallet onboarding and transaction flows. We work with Onfido and Sumsub as our primary KYC partners, and we wire them into your system so that compliance is automated rather than manual.

  • KYC onboarding flows with document verification and liveness checks
  • AML transaction monitoring with configurable rule sets
  • Sanctions screening on wallet creation and high-value transactions
  • Audit trails and SAR-ready reporting for compliance teams

Card issuing and virtual card infrastructure

If your wallet issues virtual or physical debit cards — prepaid, branded, or linked to a user balance — we build the card issuing infrastructure through Visa and Mastercard programme managers. This covers card creation, spending controls, real-time transaction notifications, and the reconciliation loop back to the wallet ledger.

  • Virtual card issuance via Visa / Mastercard programme managers
  • Spending controls: limits, merchant category blocks, geographic restrictions
  • Real-time push notifications on card transactions
  • Reconciliation between card spend and wallet ledger balances

Authentication and fraud prevention

Wallet security is a layered problem. We implement multi-factor authentication, device binding, session management, and behavioural fraud detection so that bad actors are stopped before funds move — not after.

  • MFA flows: SMS OTP, TOTP, biometric
  • Device fingerprinting and binding for trusted device management
  • Velocity checks and anomaly detection on transaction patterns
  • Fraud rule engine with configurable thresholds and manual review queues

Who we work with

Teams that need wallet infrastructure done properly — from first launch to scale and embedded finance.

Fintech founders building their first wallet product

You have the product vision but need an engineering team that has done this before. We scope, design, and build the full stack from ledger to card issuing, and we make the compliance decisions that would otherwise slow you down for months.

Teams rebuilding a wallet that cannot scale

Your current system was not designed for the volume you are at now. Balance inconsistencies, reconciliation nightmares, slow settlement. We audit what you have, identify the root causes, and rebuild the components that are breaking — without bringing everything down.

Embedded finance products adding wallet features

You are building a marketplace, a gig economy app, or an enterprise platform and you need to hold and move money inside the product. We build the wallet layer that sits inside your existing product without requiring a full rebuild.

How the engagement works

We do not hand you a quote after a 20-minute call. We scope properly first — because wallet projects that start with vague requirements end up with expensive rebuilds.

01

Free scoping call (30 minutes)

We walk through what you are building, where you are in the process, and what the key technical unknowns are. No pitch. Just a real conversation about the problem.

02

Architecture and scoping document

Within one week, we deliver a written scoping document: proposed architecture, component breakdown, technology recommendations, compliance considerations, and a phased delivery plan. This is the document you take to investors or your board — not a sales deck.

03

Sprint-based delivery

We work in two-week sprints with a demo at the end of each sprint. You see progress constantly. No black box. No “we will show you in three months.” Every sprint closes with a working, tested increment.

04

Launch and handover

When the wallet goes live, we stay involved for the stabilisation period — monitoring performance, resolving edge cases, and training your team on the system. We do not hand over code and disappear.

Digital wallet development FAQs

We typically own the full technical stack — ledger, transaction engine, compliance integrations, and card issuing where needed — so the pieces stay consistent. We can also phase delivery or take over specific layers if you already have parts in place.

We have delivered controls and flows aligned with requirements in the UAE, UK, EU, and US, and we tailor screening, KYC, and reporting to the jurisdictions you operate in. Exact programme setup depends on your licences and banking or programme-manager partners.

We work most often with Onfido and Sumsub and wire them into onboarding and ongoing monitoring so decisions are automated where possible and escalated cleanly where they are not.

Yes. We frequently embed wallet capabilities inside existing apps and APIs, run two-week sprint demos with your team, and hand over with documentation and training so you can operate the system long term.

Start with a scoping call

If you are building a digital wallet and want a team that has done it before — for YC-backed companies processing millions of transactions — book a free 30-minute scoping call. We will tell you exactly what we think you should build, in what order, and what it will realistically take.

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