Role
Senior Software Engineer, Interoperability — R3
Ignace Loomans. Senior engineer building interoperable systems.
01 — Context
A builder at the seams between chains, institutions and people.
Currently at R3, I design and ship interoperability between Corda and public chains — a Corda notary running on Solana via Anchor, an ERC‑4626 yield vault backed by Pyth price feeds, and the Harmonia bridge delivering Corda‑to‑EVM flows on Corda 5.
Before that, SonX: architecting the backend microservice layer, writing ERC‑20, NFT‑marketplace and governance contracts, and wiring custodian wallets to Stripe and Web3 payment rails. Earlier, Blockchain Reply: Hyperledger work for the NHS, self‑sovereign identity, and ZK‑proof mobile wallets.
Outside the day job I run Celium Tickets — an ERC‑1155 ticketing platform in production — and Print My PR, which turns Strava activities into 3D‑printed objects. I hold an MSc in Financial Technology from Imperial and a BSc in Finance (magna cum laude) from Bentley.
02 — Trajectory
Five years across
interop, infra and identity.
From Hyperledger consulting through ERC‑20 marketplaces to production cross‑ledger interoperability for central banks and institutional clients.
2023 — NOW
R3London · Senior SWE, Interop
ERC‑4626 RWA yield vault with Pyth feeds. Corda notary on Solana via Anchor. Maker/Checker issuance & redemption for the CBUAE CBDC. Delivered the Harmonia Corda↔EVM interop on Corda 5; shipped Wholesale & Bond DVP with Bank of America's Digital Labs.
KotlinSolidityAnchorPythCorda 5
2021 — 2023
SonXLondon · Software Developer
Architected the backend microservice platform in Node.js + GraphQL. ERC‑20 staking, NFT marketplace and governance contracts. Custodian wallet + Stripe/Web3 payments. Co‑authored platform whitepapers.
NodeGraphQLSolidityAWSReact Native
2020 — 2021
Blockchain ReplyLondon · Consultant / Developer
Hyperledger Fabric platform against fake news. Led an NFT platform on Moonbeam + IPFS. Contributed to a self‑sovereign identity platform for the NHS on Hyperledger Indy, plus a Hyperledger Aries mobile wallet with ZK proofs.
HyperledgerIndyAriesMoonbeamZKP
2019 — 2020
Imperial College Business SchoolLondon · MSc Financial Technology
Intersection of finance, infrastructure, and cryptographic systems — the through‑line behind every role since.
MScFinTech
2016 — 2019
Bentley UniversityBoston · BSc Finance, Minor CIS
Magna cum laude. Major GPA 3.88. Where I started writing code against financial problems instead of the other way around.
BScFinanceCIS
03 — Selected work
Things I built
on my own time.
P.01 / IN PRODUCTION
Celium Tickets
ERC‑1155 · GCP · Next.js · React Native
A blockchain ticketing platform that lets organisers mint transferable tickets as ERC‑1155 tokens. Deployed in production by Slade Adventure's jazz night — £1,400 raised on first event — with Next.js on the web and a React Native companion app.
ERC‑1155GCPNext.jsReact NativeStripe
P.02 / SIDE
Print My PR
Next.js · Strava API · 3D printing
Connect Strava or Google Fit, pick a run, ride or hike, and order a 3D‑printed physical object of the activity's route. Turns intangible GPX files into something you can hold.
Next.jsStravaBlenderGCP
P.03 / RESEARCH
Aries Mobile Wallet
Hyperledger · React Native · ZK
Research wallet storing Hyperledger Indy credentials and proving status to verifiers using zero‑knowledge proofs — explored during NHS self‑sovereign identity work.
IndyAriesZKPRN
04 — Stack
Tools I reach for
without thinking.
BLOCKCHAIN
- Solidity daily
- Anchor daily
- Corda daily
- Substrate shipped
- Ink! shipped
- Hyperledger shipped
- Hardhat daily
LANGUAGES
- Kotlin daily
- Rust shipped
- TypeScript daily
- JavaScript daily
- Python used
- SQL used
FRONTEND
- React daily
- Next.js daily
- React Native shipped
- GraphQL shipped
- Three.js used
CLOUD & OTHER
- GCP daily
- AWS shipped
- Kubernetes shipped
- Jenkins used
- Stripe shipped
- Blender used
- Pyth daily