I'm Jaswinder. Based out of Barcelona, Spain.
Eight years building systems where the cost of a bug is somebody
losing money or trust — payment engines for UK/EU at Barclays, an
enterprise wallet from scratch at Zbyte, a multi-merchant onramp +
checkout shipped in a week at Pingpay, and a recurring-payment
engine that runs trust-minimised inside a TEE. Open systems, hard
problems, things that have to be right the first time.
Currently:
- 🏗️ Lead Developer @ Pingpay — payment infra in TypeScript, Rust, WASM, and Phala TEE
- 🧠 Early contributor to
Ironclaw — a Rust,
privacy-first AI assistant framework - 🤖 Daily practitioner of the Ralph Wiggum
technique — long-running autonomous coding agents, spec-driven, test-gated - 🛠️ Co-founder @ Harmonic Guild — a small open-source dev collective
On using AI for the actual work: I run cloud coding agents
(Claude Code, Devin, Replit Agent) as part of how I ship —
multi-agent PR-and-review loops, autonomous bash-loop agents
grinding on a spec until the tests pass, evals on the prompt the
same way you'd eval a model. The interesting part isn't the model,
it's the orchestration around it.
📬 jaswinder@harmonicguild.io . 🐦 @jassification . 💼 linkedin