Behind the Scenes: How to Build a Multi-Functional Digital Banking Platform with Velmie

Building a national scale digital banking platform demands more than individual features. It requires an execution model where architecture, integrations, resilience, and delivery discipline work as a single system. At Velmie, this system mindset guides every project we deliver. Nowhere is this more evident than in the success of Vult, Sierra Leone’s rapidly expanding super app built together with Metrocable.

Vult surpassed more than 475,000 active users within its first twelve months, becoming one of the most significant fintech achievements in West Africa. This adoption curve did not happen by chance. It is the result of a deliberate architecture and delivery model supported by Velmie’s modern modular digital banking platform, our engineering teams, and a strong alignment with Metrocable’s market vision.

As Cyril Macauley, Chief Product Officer at MetroCable/Vult, stated, “Collaborating with Velmie has significantly contributed to the advancement of our digital banking infrastructure. By utilizing Velmie’s platform, we have developed a secure and user-friendly financial solution that enhances access to essential services. Velmie’s robust technology aligns with our strategic objectives and supports our commitment to expanding financial services.”

His observations reflect our core principles: a platform must be secure, composable, and scalable from day one.

A future fit foundation for emerging markets

The foundation of Vult is Velmie’s cloud native, API centric, modular architecture, as represented in the Velmie Deck where we outline the platform as cloud native, crypto friendly, API centric, AI powered, modular, and built on modern framework. This technology stack is engineered for emerging markets where resilience, flexibility, and integration agility are critical.

Our platform provides:

• A modular banking core supporting accounts, payments, cards, multi-currency wallets, savings, and loans

• A comprehensive white label mobile and web interface

• A partner ecosystem with more than 50+ pre integrated providers spanning payments, compliance, onboarding, identity, and liquidity

• API orchestration enabling institutions to launch differentiated products fast

• A delivery model designed to reduce time to market by up to six times compared to industry averages
  

These capabilities allowed Metrocable to integrate payments, utilities, merchant services, and consumer financial products into a unified app experience that could be deployed, tested, and scaled rapidly.

Building a multi-layer, multi-functional platform

A platform serving hundreds of thousands of individuals and merchants requires more than feature breadth. It must synchronize dozens of financial workflows across user authentication, transactions, compliance, settlement, liquidity, and risk.

Our modular platform supports this through its core functional areas:

Accounts

Individual, business, and multi-currency accounts with full ledger management, virtual IBANs, savings, and credit lines.

Payments

Domestic transfers, instant P2P, QR payments, cross currency payments, invoicing, bulk payouts, and FX management.

Cards

Debit, credit, prepaid, virtual cards, and wallet provisioning for Apple Pay, Google Pay, and Samsung Pay.

Investments

Support for stock investments, crypto assets, NFT tokens, integrated custody, and on ramp and off ramp liquidity providers.

User Management

Comprehensive identity workflows, imports and exports, CRM and ERP integrations.

Vult leverages this multi module configuration to operate as a national financial ecosystem rather than a single use app.

API orchestration and the power of integrations

The ability to integrate quickly is one of the strategic levers behind Vult’s growth. Velmie’s platform provides access to more than 50+ integrations with global payments, KYC, KYB, compliance, cards, and risk partners. This reduces integration timelines from months to weeks and creates an environment where institutions can experiment and scale without structural limitations.

For emerging markets, this is especially important. Payment providers, mobile network operators, and government led identity systems often evolve dynamically. The flexibility of our platform ensures that institutions avoid the bottlenecks associated with legacy cores.

Operational discipline and accelerated deployment

Technology alone does not deliver outcomes. Vult’s acceleration was enabled by Velmie’s delivery model which includes:

• Engineering teams assigned across backend, mobile, integration, and QA tracks

• A structured go live framework covering configuration, partner onboarding, certification, and operational readiness

• SLA based support ensuring uptime and continuous improvement

• Full IP rights available for clients requiring long term strategic independence.

This operational discipline allows institutions to move from concept to launch significantly faster than traditional core banking technology allows.

A blueprint for Africa and beyond

Africa’s digital financial landscape is accelerating rapidly. Institutions require platforms capable of supporting payments, savings, credit, identity, cards, merchant operations, and investments under a unified architecture. Velmie’s modular platform is designed specifically for this future.

Vult now stands as one of the continent’s most compelling case studies. It is the result of technology engineered for scale combined with a partner who understood how to leverage it strategically.

To support the broader fintech community, Velmie and Metrocable have announced the webinar that provides a detailed look into the development journey behind Vult. The session will examine the architectural decisions that enabled rapid nationwide adoption and offers practical insights for institutions seeking to launch or scale digital banking platforms in emerging markets.

The discussion features Cyril Macauley, Ahmed Elomar, Julia Prus, and Carl Johan Larsson. Together they will walk through Vult’s key development milestones, the design of its provider ecosystem, its launch strategy, and the operational frameworks required to build and sustain a high growth financial platform across frontier economies.

Going forward

Our mission at Velmie is to empower institutions with technology that is future fit. The success of Vult validates our platform model and demonstrates what can be achieved when modern architecture meets strong market leadership. As more institutions across Africa move to digitize financial services, we remain committed to delivering the infrastructure, expertise, and partnership required to unlock national scale impact.

To learn more about Velmie’s platform, our client success stories, and our technology capabilities, visit our website or connect with our team.