SaaS Development • Software
Velox: High-Velocity SaaS Billing Engine
An SDK-driven API platform managing high-frequency recurring billing, billing metrics, and seat allocations for global software businesses.
Key Performance Metrics
25kBilling Queries / Sec
$180MTransaction Volume
99.999%API SLA Uptime
The Challenge
Velox needed a billing backend capable of handling millions of micro-transactions, subscription upgrades, and downgrades across various geographic currencies without dropping billing records or generating duplicate transactions.
Our Engineering Solution
We designed a ledger-first billing engine written in Rust and Node.js. By utilizing PostgreSQL's transactional locks and Redis clusters to check user seat state, we ensured double-spend protection. We built a beautiful dashboard with Next.js to provide clear visualizations of key SaaS metrics (MRR, LTV).
Business Outcomes
Deployed a billing API with a sub-5ms response rate globally.
Safely processed $180M in transaction volume without a single ledger conflict.
Provided an intuitive customer dashboard that reduced billing-related support tickets by 65%.
Integration Stack
Next.jsNode.jsRustPostgreSQLRedisGraphQLDocker