Blockchain & Digital Assets

Digital Asset Wallets & Custody

Mobile, web and embedded wallets with disciplined key management, custody integration and clear signing.

Projects delivered
80+
Countries served
16
Global offices
4
Founded
2021

The challenge

Where teams get stuck

The problems we're most often brought in to solve.

  1. 01

    Key loss without recovery

    Users lose access to funds when seed phrases are lost, with no safe recovery path.

  2. 02

    Blind transaction signing

    Users approve transactions they cannot read, exposing them to scams and malicious contracts.

  3. 03

    Multi-chain complexity

    Supporting many networks and tokens creates inconsistent balances and fee handling.

Overview

Digital Asset Wallets & Custody at VulcanTech

A digital asset wallet is software that stores the keys controlling digital assets and lets users view, send and sign transactions. VulcanTech engineers wallets for consumers and institutions, from non-custodial mobile wallets to embedded wallets and multi-signature treasury tools, integrating with qualified custodians where required. Key storage, recovery and signing flows are designed first, and transaction screens show users exactly what they are approving.

Key deliverables

  • Key management and custody design
  • Mobile or web wallet application
  • Transaction decoding and risk checks
  • Security review and penetration test coordination
  • App store release support

What you get

What Digital Asset Wallets & Custody includes

  • Secure key storage

    Keys held in device secure enclaves or split using MPC, never stored in plain text.

  • Recovery options

    Social recovery, encrypted cloud backup or multi-signature recovery designed around your risk model.

  • Readable signing

    Decoded transaction details and warnings on risky approvals before users sign.

  • Multi-chain balances

    Support for Ethereum, EVM networks and selected other chains, with token and collectible views.

  • Biometric authentication

    Face and fingerprint sign-in using native device security features.

  • dApp connectivity

    WalletConnect support and in-app browsing for decentralised applications.

Our process

How we deliver

A delivery process you can see into — from first workshop to production support.

Book a free consultation
  1. 01

    Discovery

    A focused working session on your objectives, constraints and existing systems. It concludes with a scoped proposal and a clear view of value, risk and effort.

  2. 02

    Architecture & planning

    We agree the target architecture, data model and integration approach before product code is written, and secure your sign-off.

  3. 03

    Iterative delivery

    Working software reaches a staging environment on a regular cadence, giving stakeholders continuous visibility and the ability to steer priorities.

  4. 04

    Assurance & hardening

    Automated testing, accessibility and performance budgets, and a security review are completed before anything reaches production.

  5. 05

    Launch & continuity

    We manage cutover and remain engaged through an agreed support period, with a structured handover to your teams or ongoing operation by ours.

Engagement models

Work with us the way that suits you

Explore engagement models →
  • Outcome-based delivery

    A defined scope, timeline and commercial model agreed after discovery. We own delivery risk against the agreed outcomes.

    Best for: Well-defined initiatives, MVPs and first releases

  • Dedicated product teams

    A cross-functional pod — engineering, design, QA and delivery leadership — aligned to your roadmap and scaled as priorities change.

    Best for: Long-term product development and evolving roadmaps

  • Team extension

    Senior engineers embed in your organisation, work inside your processes and report to your leaders — on contracts that assign all IP to you.

    Best for: Adding specialist capability without growing headcount

Tools & technologies

The stack we build with

  • React Native
  • TypeScript
  • ethers.js
  • viem
  • WalletConnect
  • Safe

Why VulcanTech

A partner, not a vendor

Senior engineering, honest delivery, and work we can name.

  • Senior engineers own delivery

    The engineers who scope your programme in discovery are the engineers who deliver it. There is no hand-off to a junior bench after contract signature.

  • Engagement models that fit

    Outcome-based delivery, dedicated product teams, team extension or global capability centres, matched to how your organisation prefers to work.

  • A verifiable track record

    Every customer story we publish describes real production work, naming the client wherever confidentiality allows, including public-sector platforms secured through competitive tenders.

  • 80+ projects in 16 countries

    Delivered since 2021 across the public sector, real estate, healthcare, manufacturing and consumer technology, for regulated and high-growth organisations alike.

FAQ

Frequently asked questions

Can't find what you need? Ask us in the discovery session.

In a non-custodial wallet, yes: keys are generated and stored on the user's device or split using MPC so no single party holds them. In a custodial model, a regulated custodian or your organisation holds keys on users' behalf, which carries additional legal and security obligations that your advisers should review first.

Free discovery session

Start your Digital Asset Wallets & Custody project

Tell us what you're building. You'll hear back from an engineer, not an inbox.

  1. 1We reply within one business day to set up a 30-minute call.
  2. 2A senior engineer — not a salesperson — walks through your problem.
  3. 3You get a scoped proposal with timeline and cost. No obligation.

New projects & sales

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Existing clients & support

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Tell us about your project

Takes about 2 minutes
What do you need help with?
Estimated budget
When do you want to start?

We reply within one business day.