backend engineering studio

Firefly

Complex backends for business management systems.

We design product cores, integrations, payment and operations layers where data accuracy, access control, resilience, and supportability matter.

api contracts queues webhooks observability
Discuss a project View services
firefly@core:~/control-plane engineering

$ model core --checks

✓ contracts api / events / db

✓ queues retry / idempotent

! legacy adapter isolated

✓ release rollback known

Products

F1REFlY tools for engineering workflows.

F1REFlY turns selected internal tools into products when they solve repeated development, support, or operations work.

F1REFlY product Tersa A native window for 218 built-in Direct commands and 200 sandbox-safe native Mac App Store commands, multi-step Chains, snippets, previews, and repeatable actions. Open product ->
Tersa — command palette for daily macOS commands
F1REFlY product Tunello A native menu bar and manager for SSH tunnels, local ports, on-demand routes, gateway stacks, snippets, and diagnostics. Open product ->
Tunello — SSH tunnels for macOS

Related services

business systems backend Business systems golang backend engineering Go backend aws devops backend AWS DevOps crm erp integrations CRM/ERP integrations payments queues webhooks Payments and queues