Engineering for a one-click checkout and payments platform — where every millisecond of latency and every fraction of a percent in conversion translates directly into merchant revenue.
Bolt powers one-click checkout for online retailers — a shopper network where a returning customer can buy anywhere in the network with a single click. Checkout is the highest-stakes surface in e-commerce: it handles money, identity, and fraud decisions in real time, and any friction shows up immediately as abandoned carts.
EXN engineers worked within Bolt's product teams on the surfaces merchants and shoppers touch every day — the embeddable checkout experience, the APIs and integrations that connect Bolt to commerce platforms, and the internal tooling that keeps a payments system observable and reliable.
The embeddable checkout flow itself — fast to load, resilient inside any merchant storefront, and tuned relentlessly for conversion.
Transaction processing paths where correctness is non-negotiable — authorization, capture, refunds, and the signals that feed real-time fraud decisioning.
APIs, webhooks, and plugins connecting Bolt to the commerce platforms merchants already run on — built so onboarding takes hours, not weeks.
Observability, alerting, and internal dashboards for a system that moves money — because in payments, downtime is measured in lost revenue per second.
Checkout engineering is a discipline of small margins: shaving load time, removing a field, catching fraud without blocking a good customer. Compounded across a merchant network, those margins are the product.