API & Backend

Integrations are where most projects get stuck, so we treat them as a first-class concern. Payment gateways, CRMs, ERPs, shipping providers, identity providers, accounting systems, our team has wired them all into production. We handle the unglamorous parts: retries, idempotency, webhooks, rate limits, and audit logs, so your data stays consistent and your customers stay happy.

Third-party APIs are the part of a system you do not control, so we isolate them. TradePartner reaches Tradier and Schwab through a broker adapter layer, which is what lets a trader run the same automation on either one while each API's authentication, order-status model and failure modes are handled separately. When one provider changes its behavior or starts returning something unexpected, the problem stops at its adapter instead of spreading through the product.

Backends fail in ways a form never does. Two evaluators can reach the same conclusion at the same instant, and a client can retry a request you already applied. PortfolioPulse settles those with an atomic compare-and-set on the row that must only fire once, a PostgreSQL advisory lock so concurrent edits to one portfolio serialize instead of interleaving, and an idempotent sync keyed on a client-supplied id behind a unique index, so a retried request cannot double-apply. In PDS Trader, saving a strategy updates the strategy, replaces its legs and re-checks the trader's saved favourites inside one SQL transaction, so a partial save cannot leave those favourites pointing at something that no longer exists.

Whether you need a brand-new backend for a SaaS product or want to modernize a legacy system one service at a time, we deliver APIs that are well-documented, observable, and built to last.

An API is not finished when it returns the right JSON. The SuperSeasonals backend carries per-user rate limiting, structured logging and proper async I/O on its heaviest endpoint. PDS Trader does not own its user store at all: sign-in federates to the SmartTrading identity provider, and the response carries two scoped tokens so one session drives two products and both realtime hubs.