Institutional custody
Digital asset custody software development,
keys you can prove.
We design and build institutional digital asset custody solutions for crypto startups, licensed VASPs, PSPs and banks. One EU engineering team owns key generation, signing policy, wallet infrastructure, sweeps and the audit trail — the result is a digital asset custody platform your ops team can run and your auditor can read.
- EU-based engineers
- MiCA-ready architecture
- AML and Travel Rule aware
Key tiers
Hot, warm, cold: three tiers, one policy
Splitting funds across tiers is the oldest secure digital asset custody control there is. It still works. Each tier holds a different amount and answers to a different rule, from HSM-held cold reserves to policy-bound hot floats.
Trading balances sit next door in our exchange build practice. Payout paths are covered on payment gateway engineering, and the platform layer on fintech infrastructure.
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Hot tier
- Holds
- Working float
- Signing
- Automated, policy-bound
- Approval
- Rules only
Customer withdrawals and venue settlement.
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Warm tier
- Holds
- Daily top-up
- Signing
- MPC quorum
- Approval
- Two named people
Refills the hot tier on a set schedule.
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Cold tier
- Holds
- Reserve
- Signing
- HSM, offline
- Approval
- Quorum plus dual control
Long-term storage. Moved rarely, never in a hurry.
Scope
Custody wallet infrastructure, end to end
An enterprise digital asset custody platform is six systems that must agree. We build them as one product, with one team accountable for the whole path from key ceremony to on-chain broadcast.
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01
Key generation
Keys are born inside the boundary and never leave it. Ceremony steps are written down and witnessed.
- MPC or HSM-backed
- Documented ceremony
- Sealed backup material
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02
Signing service
One service signs. It checks policy first, then the request, then the limits. Nothing else touches a key.
- Policy engine
- Per-asset limits
- Idempotent requests
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03
Deposit handling
Address issue, confirmation tracking and sweeps run as one path. Late chain reorgs are handled, not ignored.
- Address derivation
- Reorg-safe crediting
- Scheduled sweeps
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04
Withdrawal flow
Every payout crosses a queue with checks and a human gate above a set size. Speed comes from tuning, not shortcuts.
- Allow lists
- Velocity caps
- Break-glass hold
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05
Chain coverage
New chains land as plug-ins on one wallet core. Adding an asset does not fork the whole system.
- UTXO and account models
- Fee strategy per chain
- Node or provider mix
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06
Proof of balance
Chain state is reconciled against the ledger every day. Gaps raise an alert before a customer finds them.
- Daily reconciliation
- Reserve reporting
- Drift alerts
Controls
Controls on the payout path
Nothing signs on the first ask. In an institutional crypto custody infrastructure, every withdrawal crosses four gates before a key is touched — and each gate writes its own record for the audit trail.
Payout path: request, then policy, then screening, then signing, then broadcast.
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Who can move funds?
Roles are narrow and separate. The person who requests a payout can never approve it.
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What stops a bad payout?
Allow lists, per-asset caps and screening run before signing. A failed check holds the request.
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How is a transfer traced?
Travel Rule data rides with the transfer. Both legs are stored with the signing record.
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What does an auditor see?
A signed, time-ordered log. Each entry links the request, the checks and the on-chain result.
Resilience
Backup and recovery, rehearsed
A backup you have never restored is a guess. Every secure digital asset custody deployment we ship proves the recovery path with your staff before a single customer coin is held.
- 01
Threat model
Week 1
We list what can go wrong: insider, endpoint, vendor, chain. Each risk gets an owner and a control.
- 02
Backup design
Week 2
Shares are split across sites and roles. No single person or room can rebuild a key alone.
- 03
Recovery drill
Before launch
We restore keys in a test run with your staff. The runbook is proven, not assumed.
- 04
Live operation
Ongoing
Rotation, drills and reviews run on a schedule. 24/7 cover with named engineers.
Engagement
Four ways to buy the custody build
Digital asset custody technology usually starts small and grows. The commercial model should follow it — pick the shape that matches your roadmap.
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Fixed-scope build
A defined wallet system at a fixed price. Best when the asset list is settled.
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Dedicated team
A standing squad with a lead. Best for long roadmaps and new chains each quarter.
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Staff augmentation
Senior engineers inside your team. Best when you own the plan and need key depth.
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CTO advisory
A custody model review before you commit. Best at the design stage.
Questions
Digital asset custody FAQs
What buyers of custody software ask first. Ask the rest on the call.
Do you build a digital asset custody platform in-house or wire us to a provider?
Both. We build self-hosted digital asset custody on MPC or HSM, or we integrate your team with a licensed custodian. The trade-offs are costed in discovery.
Can you take over an existing crypto custody software stack?
Yes. We start with a key-handling and code review of the current wallet infrastructure. Then we agree what to keep, what to wrap and what to rebuild.
How do your digital asset custody services address MiCA duties?
We build to the segregation, record-keeping and reporting duties your legal advisers scope. We are engineers, not a law firm — controls, evidence and audit trails are what we deliver.
What makes this an institutional digital asset custody solution?
Named quorums, dual control, HSM-held cold reserves, per-asset velocity caps, sanctioned-address screening, Travel Rule data on every transfer and a signed audit log that a regulator or Big Four auditor can read.
Which chains and assets can the custody wallet infrastructure cover?
Bitcoin, EVM chains, Solana and other account or UTXO networks land as plug-ins on one wallet core. Adding a new asset does not fork the platform; the same policy engine and signing service govern it.
Who owns the resulting digital asset custody infrastructure?
You do. The system is bespoke and client-owned — source, keys, audit trail. No white-label lock-in, no per-seat licence, no vendor gate between you and your customers.
Scope your digital asset custody build
Bring your asset list and your risk limits. We come back with a custody model, a control map and a costed plan for a wallet infrastructure for digital asset custody your team owns end to end. No demo theatre.