Blockchain & Web3 Development Company in Birmingham

A permissioned-ledger pilot for a Birmingham FS firm (HSBC UK Bank ring-fenced retail, Deutsche Bank Brindleyplace, Goldman Sachs Birmingham, BMO, BNP Paribas) typically lands at GBP £120,000 to £280,000 over twelve to eighteen weeks, covering business case, FCA pre-application meeting support, Hyperledger Fabric or R3 Corda network deployment across three to five nodes, smart-contract or chaincode build, one external security audit, and a regulator-shaped operational runbook. A production rollout (tokenised deposit, intraday repo, trade-finance DvP) ranges from GBP £450,000 to £1.6M depending on integration depth into core banking, custody arrangements, and Bank of England Regulated Liability Network alignment. We quote fixed-fee in GBP because Big Four advisors and your CFO need landing cost before kickoff, and we coordinate the legal opinion with a Birmingham city centre firm (Gowling WLG, Pinsent Masons, or DLA Piper).

PRA Supervisory Statement SS1/21 requires HSBC UK Bank, as a ring-fenced body, to operate retail banking independently of HSBC Holdings investment banking. For tokenised deposit pilots that means the ledger nodes, custody systems, settlement infrastructure, and any shared analytics must sit inside the ring-fenced perimeter with no cross-trust to non-RFB AWS accounts or Azure tenants. We build the network into a separate AWS Organization or Azure tenant, isolate the CI/CD pipeline, and tie node IAM to the RFB identity provider only. Cross-affiliate flows (for example, an HSBC investment-banking treasury settling against an HSBC UK Bank tokenised deposit) must move through documented inter-affiliate service agreements with arm's-length pricing, which we encode into the smart-contract entitlement logic so PRA's annual ring-fencing attestation can sample evidence on demand.

Yes. EU Regulation 2023/1542 (the Batteries Regulation) requires digital battery passports for EV batteries placed on the EU market from February 2027, covering carbon footprint, recycled content, performance and durability, and supply-chain due diligence. We have designed Hyperledger Besu and Polygon-based passports compatible with the Catena-X data-space pattern (which BMW, Volkswagen, and Mercedes-Benz are anchoring) so JLR's Wolverhampton powertrain plant, Gaydon engineering, and the upcoming Somerset gigafactory can interoperate with European OEM trading partners. Each passport carries a unique identifier per battery, links to verifiable credentials for the material origin and recycled-content audit, and exposes a public-read API while keeping sensitive cell-chemistry data inside an encrypted off-chain store on AWS eu-west-2 with selective disclosure governed by the Vehicle Manufacturer's role in the data space.

The FCA Digital Securities Sandbox (DSS) is a joint FCA-Bank of England sandbox running from late 2023, allowing firms to issue, trade, and settle digital securities outside parts of the Central Securities Depositories Regulation and the Uncertificated Securities Regulations. Eligible activities include digital-bond issuance, tokenised money-market funds, and post-trade DLT settlement venues. We screen Birmingham FS use cases against the DSS Gate 1 (cohort entry) and Gate 2 (live activity) requirements during discovery, draft the application material in coordination with a Pinsent Masons or DLA Piper Birmingham team, and build the technical stack to match the FCA's expected operational-resilience and segregation controls. Several Birmingham investment banks (Goldman Sachs, Deutsche Bank Brindleyplace) and global asset managers have already entered DSS cohorts, so the pattern is well-established for the FCA's supervisory team.

Both, but we screen carefully against the FCA Financial Promotions Order Section 21 regime and the cryptoasset financial-promotions rules in PS23/6 before any consumer-facing public-chain build proceeds. For institutional clients, public-chain work (Ethereum mainnet, Polygon PoS, Arbitrum, Linea) typically fits tokenised commercial paper, supply-chain attestation outside the FCA perimeter, NFT-style verifiable credentials for JLR parts or Rolls-Royce Birmingham nuclear components, and creator-payment rails for BBC Birmingham or Channel 4 Midlands content partners. We handle the AML registration under MLR 2017 with the FCA where the activity meets the cryptoasset business definition, and we coordinate with a Birmingham-based Big Four firm (KPMG, PwC, Deloitte, EY) for the periodic AML attestation that follows registration.

Every Birmingham smart contract passes a three-layer review before any value moves. Layer one is automated: Slither for static analysis, Mythril and Echidna for symbolic execution and fuzzing, and the SWC Registry as a checklist mapped into our Hardhat or Foundry test suite. Layer two is internal peer review: at least one engineer not on the build pulls and reviews against OpenZeppelin Contracts 5.x conventions, ERC standard compliance (ERC-20, ERC-721, ERC-1155, ERC-4626 where relevant), and the Birmingham FS client's chosen access-control pattern. Layer three is an independent external audit by ConsenSys Diligence, Trail of Bits, OpenZeppelin, or Halborn for production-grade institutional builds (HSBC UK Bank tokenised deposit, Goldman Sachs Birmingham repo, JLR battery passport at scale). Audit cost typically runs GBP £35,000 to £120,000 depending on contract size and is scoped explicitly into our fixed-fee proposal.

On-chain personal data is incompatible with UK GDPR's right to erasure (Article 17), so we never write personal data directly to a blockchain. Instead we store personal data off-chain in encrypted AWS eu-west-2 (London) or Azure UK South tiers, write only a hash or a verifiable credential pointer to the ledger, and bind the off-chain record to the on-chain commitment through a deterministic derivation. When erasure is exercised, the off-chain record is deleted and the on-chain hash becomes a meaningless commitment with no recoverable subject, which the ICO has accepted as a proportionate approach in its 2024 blockchain guidance. For HSBC UK Bank-style ring-fenced retail and JLR-style automotive identity flows we layer in Decentralised Identifiers (DID) and W3C Verifiable Credentials so selective disclosure satisfies data-minimisation under Article 5(1)(c) without breaking the audit trail.

We offer three GBP fixed-monthly managed-service tiers post go-live. Tier 1 (node stewardship) at GBP £4,500 to £10,000 per month covers validator and peer-node operations, key-management rotation, patch management, and quarterly chaos drills. Tier 2 (node plus smart-contract operations) at GBP £10,000 to £24,000 per month adds upgrade governance (proxy administration, multisig coordination, timelock workflows), on-chain monitoring (Forta, Tenderly, OpenZeppelin Defender), and incident response within a 30-minute SLA. Tier 3 (regulated FS managed blockchain) at GBP £24,000 to £65,000 per month is tailored to HSBC UK Bank ring-fenced retail, Deutsche Bank Brindleyplace, Goldman Sachs Birmingham, BMO, or BNP Paribas use cases, with named UK-resident engineers, SC clearance pathways where required, annual independent attestation aligned to FCA Operational Resilience SS2/21, and coordinated reporting into the PRA's Major Incident Reporting framework.