API Integrations
- 1–6 weeks per integration
- Typical initial project USD 3k–15k+ · single integrations usually at the lower end
Half of every product is integrations. The half nobody designs for, where corner cases live and weekends die. We've shipped enough Stripe webhooks, Twilio flows, OAuth dances, and accounting syncs to know exactly where the dragons are — and we wire them up so they don't bite.
Built for teams that need senior engineering — fast.
- Teams adding payments, billing, identity, or messaging to a product
- Companies wiring up CRM ↔ accounting ↔ marketing tool sync
- Engineering orgs replacing brittle in-house integrations
- Anyone whose webhooks fail silently at 3am
Concrete deliverables. No vague promises.
Payments — Stripe, Paddle, Lemon Squeezy
Plans, seats, usage metering, prorations, webhooks (with idempotency), customer portal, tax (Stripe Tax / Avalara), 3DS, dunning.
Identity & SSO
OAuth 2.0 / OIDC, SAML for enterprise, social logins, MFA, magic links, organisation memberships, SCIM provisioning.
Comms — Twilio, SendGrid, Postmark
SMS, voice, programmable email, transactional templates, deliverability monitoring, bounce/complaint handling.
Data sync between systems
Bidirectional, idempotent, conflict-aware. CRM ↔ accounting ↔ product DB, with full audit trail and replay capability.
AI providers
OpenAI, Anthropic, Bedrock, Together — abstracted behind a clean interface so you can route per-task and switch models without rewrites.
Observability & retries
Every integration has structured logs, alerting on failure, automatic retries, and a manual replay tool for ops.
A repeatable, transparent process.
- 01AuditExisting integrations, failure modes, cost.
- 02DesignClean interfaces, idempotency keys, retry strategy.
- 03BuildOne integration at a time, fully tested before the next.
- 04HardenChaos test failure modes, replay tooling, alerts.
- 05DocumentRunbooks, API contracts, on-call playbook.
Battle-tested tools we typically reach for.
Common questions about api integrations.
Can you take over an existing flaky integration?+
Yes — that's a big chunk of what we do. Audit, then either patch surgically or rebuild cleanly with the lessons from the failures.
Do you handle PCI compliance?+
We architect so you stay out of PCI scope (Stripe Checkout / Elements, never raw card data on your servers). For PCI-required flows, we follow SAQ-A or A-EP and document the boundaries.
What about webhooks that fail?+
Idempotency keys, signature verification, dead-letter queues, and a manual replay tool with audit logging. Webhook failures become visible incidents, not silent data loss.
Can you integrate with our internal API?+
Yes. We treat your internal API the same as any third party — versioned contracts, error budgets, observability, retries.
Ready to start?
Free 30-minute qualification call. Then a paid discovery that fixes scope, architecture, milestones and price in writing.