Squad B

// all experience

Delivery experience of the Squad B core team

The examples below reflect work delivered by Squad B's founder and core engineers in current and prior engagements. Client names are withheld; the engagement context and our role are stated for each case.

CASE-01tier-1 international bankprior individual engagement

Multi-currency stablecoin tokenization on a private network

  1. Ops & approvals
  2. Workflow engine
  3. Asset & wallet managers
  4. FireFly
  5. Besu QBFT on Kaleido

scope owned

  • Architected and provisioned a private Hyperledger Besu network with QBFT consensus on Kaleido, with secure API orchestration.
  • Designed a multi-module Terraform codebase for the network, FireFly middleware and digital-asset layers, with per-environment toggles.
  • Deployed the digital-asset services: asset manager, wallet manager, ERC-20 indexer and workflow engine.
  • Set up governed multi-environment CI/CD with templated pipelines and secrets in managed variable groups.
our role
architecture, provisioning, delivery
network
Besu · QBFT · Kaleido
middleware
Hyperledger FireFly
iac
Terraform
ci/cd
Azure DevOps

outcomeStablecoin tokenization flows delivered for 20+ currencies.

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CASE-02european market infrastructurecurrent individual engagement

Event delivery from tokenized securities to core systems

  1. Security token contract
  2. Besu node
  3. FireFly event stream
  4. Producer API
  5. Kafka topics
  6. Downstream systems

scope owned

  • Solution architecture for delivering on-chain securities lifecycle events into enterprise messaging.
  • Architecture decision record for chain-to-core event delivery, presented to the programme team.
  • Subscription design: acknowledgements, a retry ladder and mutual TLS between platform and consumers.
  • Configuration of event schemas and contract ABIs per asset type.
  • Code review of the integration service, including platform interaction and role-based access.
our role
solution architecture, design review
network
Besu · Kaleido
events
FireFly · webhooks
messaging
Kafka
security
mTLS · RBAC
CASE-03asian investment & securities firmcurrent engagement via a delivery partner

Tokenized RWA as collateral in on-chain lending

  1. RWA token
  2. Chainlink CCIP
  3. Destination chain
  4. Morpho lending market

scope owned

  • Smart-contract integration that lets tokenized real-world assets serve as collateral in Morpho lending markets.
  • Cross-chain movement of tokenized assets using Chainlink CCIP.
  • Delivered within a dedicated engineering team for the firm's RWA programme.
our role
smart-contract engineering
contracts
Solidity
lending
Morpho
interop
Chainlink CCIP
CASE-04wallet infrastructure startupprior engagement · product team

Modular smart-account wallet with passkeys

  1. Mobile app · passkey
  2. Rust backend
  3. Rust 4337 bundler
  4. EntryPoint
  5. ERC-7579 smart account

scope owned

  • Modular smart-account architecture compliant with ERC-7579 and ERC-4337.
  • P-256 passkey validator on the native RIP-7212 precompile, with no external cryptography libraries.
  • EIP-7702 integration for native, sponsored and batched execution.
  • Custom ERC-4337 bundler and real-time GraphQL event listener in Rust.
  • The full backend from scratch — APIs, wallet orchestration, private subgraph and AWS deployment.
our role
team lead, architecture, backend
standards
4337 · 7579 · 7702
auth
WebAuthn · RIP-7212
backend
Rust · Node.js / TS
infra
AWS · subgraph

outcomeWallet stack tested end to end on iOS and Android, with test infrastructure for UserOperations, 7702 flows and WebAuthn signatures.

CASE-05global art-registry platformprior engagement

Artwork tokenization and collateralization

  1. Web2 platform
  2. REST connector
  3. Contracts on Besu (Kaleido)
  4. Subgraph on AWS
  5. Provenance views

scope owned

  • Web3 layer for tokenizing and certifying physical artworks.
  • Private-network solution on Hyperledger Besu with API integration via Kaleido.
  • Private subgraph node on AWS for provenance and ownership data.
  • REST connector between the existing Web2 platform and the smart contracts.
  • Proof of concept for lending and borrowing against tokenized artworks.
our role
technical lead, Web3 layer
network
Besu · Kaleido
contracts
Solidity
indexing
The Graph · AWS
backend
Node.js · REST

outcomeMore than 100 artworks tokenized worldwide.

CASE-06independent ethereum block buildercurrent individual engagement

Production MEV block-building infrastructure in Rust

  1. Order flow & bundles
  2. Simulation & tracing
  3. Block assembly
  4. MEV-Boost relays
  5. Refund attribution

scope owned

  • Bundle sponsorship with new order-flow primitives and a backward-compatible rollout.
  • Fail-closed treasury rebalancing designed from 30 days of production-data analysis.
  • End-to-end bundle tracing and refund attribution for customer-facing investigations.
  • Zero-downtime migration of the analytics data pipeline.
  • Liveness and win-rate alerting with runbooks; safe promotion to production.
our role
protocol engineering, production ownership
language
Rust · Tokio
protocol
MEV-Boost · PBS
evm
REVM · Alloy
ops
Grafana · Prometheus
CASE-07defi & web3 foundationsprior engagements

Lending protocol

Developed and launched the first lending protocol on Tezos, over $1M in TVL.

DEX & governance

DEX, farming and staking contracts and a governance token; airdrop to 10k+ users.

Vault strategies

Chainlink, Aave and Uniswap integrations; security audits by Hacken and CertiK.

NFT marketplace modules

Core modules used to launch 10+ no-code marketplaces.

Uniswap v4 hooks

Five hooks built in the Uniswap Hook Incubator.

// technology matrix

Every technology, mapped to where we used it

technology 01 bank 02 mkt infra 03 securities 04 wallet 05 art registry 06 block builder 07 defi

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