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'm building Laima — social prediction market vaults on Solana — alongside Celium Tickets (a revenue‑generating blockchain ticketing platform), Print My PR (Strava‑to‑3D‑print terrain models), and sketchy.bike (cycling route danger scoring with 300K+ crash records). 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 / BETA
Laima
laima.ggRust · Anchor · Axum · Next.js 16 · PostgreSQL · ClickHouse
Social prediction market vaults on Solana. Curators create managed vaults, attract depositors, and trade across Kalshi, PureBet, Jupiter/Polymarket, and Divvy.bet — all from a single vault. Rust/Anchor smart contracts handle deposits, redemptions, and real‑time NAV tracking with marked‑to‑market pricing. The backend is a Rust/Axum API with 50+ endpoints, backed by PostgreSQL + ClickHouse. The Next.js 16 dashboard spans 24 pages with 3D visualizations and Web3Auth wallet integration.
RustAnchorSolanaAxumNext.js 16PostgreSQLClickHouseWeb3Auth
P.02 / IN PRODUCTION
Celium Tickets
celiumtickets.comSubstrate · ink! · Next.js · React Native · Firebase · Stripe
A live blockchain ticketing platform on a custom Substrate chain with 14 ink!/Rust smart contracts. Events created by organisers, tickets minted as NFTs (ERC‑721 seated, ERC‑20 GA), sold via Stripe with instant payouts. Includes on‑chain attendance tracking, attendance‑gated reviews, loyalty points, collectible POAPs, and community voting. Ticket verification via a React Native verifier app that scans QR codes and burns tickets on‑chain. 18 Cloud Functions, 95+ table PostgreSQL database, embeddable widget for organiser websites.
Substrateink!RustNext.jsReact NativeFirebaseStripePostgreSQL
P.03 / IN PRODUCTION
Print My PR
printmypr.comNext.js 15 · React 19 · Three.js · Strava API · Stripe
An e‑commerce platform transforming Strava activities into custom 3D‑printed terrain models. Real SRTM satellite elevation data with the GPS route as a raised line across the surface. In‑browser Three.js viewer for customising orientation, vertical exaggeration, terrain and line colours, and text labels. Supports 15+ activity types — running, cycling, hiking, mountain biking, skiing. Stripe checkout with worldwide shipping and SendGrid order confirmations.
Next.js 15React 19Three.jsR3FStravaSRTMStripeSendGrid
P.04 / IN PRODUCTION
sketchy.bike
sketchy.bikeHono · PostgreSQL · PostGIS · React · Leaflet · Valhalla
Cycling route safety analysis powered by 300K+ real government crash records across 27 countries. Upload a GPX or import from Strava — every segment scored for danger across 9 factors: road type, speed limits, lane count, surface quality, cycleway separation, lighting, gradient, tunnel risk, and crash history with recency weighting. Dangerous sections rerouted via Valhalla with three parallel strategies. Monetised with Stripe subscriptions ($6/mo, $49/yr). Device integrations code‑complete for Garmin Connect IQ, Hammerhead Karoo, plus an Expo mobile app.
HonoPostgreSQLPostGISReactLeafletValhallaStripeMapillaryGarmin
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