Tarık
How do I position feature flags when moving from Gitflow to Trunk-Based?
Drop the long-lived branches, merge small changes to main continuously, keep unfinished work behind a flag that's off in prod, and delete flags once done.
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Tag
#Architecture
Design choices that set system boundaries, dependencies and the decisions you cannot undo.
13 answered questions carry this tag.
Rüzgar
When should I apply CQRS, and how do I sync the read and write models?
Move reporting to a read replica and adopt CQRS only when query shapes outgrow one schema, feeding the read model from outbox events, not dual-writes.
Halil
Should I choose NoSQL or PostgreSQL for flexible product attributes?
Keep products, prices and orders in PostgreSQL and put the variable attributes in one GIN-indexed `JSONB` column; reporting alone rules out splitting.
Hakan
Graceful degradation: how do I isolate non-critical services under load?
Split the critical path (browse, cart, checkout) from the nice-to-haves, put those behind feature flags with short timeouts, and rehearse the kill-switch.
Tunç
How do I set up a Circuit Breaker for a flaky third-party API dependency?
A breaker alone won't hold: pull `connect_timeout` and `timeout` down to 800ms-2s, isolate the dependency behind a bulkhead, and define a cached fallback.
Emre
Should I start a new project with microservices?
For most greenfield products, start with a modular monolith and enforce boundaries in code, promoting a module to a service only when it must scale alone.
Berk
Multi-tenant SaaS database isolation: separate DB, schema, or tenant_id?
Database-per-tenant does not scale operationally at 10k; keep tenant_id on every table and bury isolation in Postgres Row-Level Security instead.
Sıla
The payment webhook keeps re-sending the same notification; how do I set up idempotency?
Verify the HMAC constant-time over the raw body, return 200 fast and enqueue the work, and let a UNIQUE constraint on event_id enforce once-only.
Onur
How do I peel the payment module off a PHP monolith with Strangler Fig?
Shift payments at the gateway by 5/20/100 and validate in shadow first; the real work is splitting the tables, behind an anti-corruption layer and outbox.
Ece
How do I set up distributed tracing (OpenTelemetry) across microservices?
Standardize on W3C Trace Context, leave propagation to the OTel SDK, and put traceparent in the queue message header, since that is where the chain snaps.