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.
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Answered questions
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.
Tolga
If I build edge caching with Cloudflare Workers + KV, how do I do invalidation?
The moment a price changes, write through to KV or purge the key in the same transaction or outbox; a short TTL and versioned keys are only the safety net.
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.
Mert
WireGuard collides with Docker networks — how do I stabilize routing?
This is an addressing-plan problem, not a routing bug: pin Docker's pool in daemon.json, cut AllowedIPs down to the DB subnet, make routes persistent.
Deniz
How should I abstract the LLM provider (Ollama → Bedrock/OpenAI)?
Build one narrow complete(prompt, opts) interface with three implementations picked by config, and treat context window, latency and cost as config.
Kaan
When moving local files to S3, is EFS a good interim step?
Don't make EFS the interim step; switch to a Flysystem s3 disk, route reads and writes via Storage::disk(), and migrate with dual-read for zero downtime.
Selin
For the message schema between Laravel and Go services, Protobuf or JSON Schema?
For heavy Laravel-Go traffic pick Protobuf plus a schema registry, keep JSON Schema for light traffic, and deserialize into a typed DTO at the boundary.
Burak
Should I put a Kafka/Redis buffer between Fluent Bit and OpenSearch when shipping logs?
Turn on Fluent Bit's filesystem buffer first; move to Kafka once 40k/s is permanent, and keep a Redis list only for logs you can afford to lose.