Mathias Paulenko

Set up Celery with Redis broker for distributed task processing including task chaining, groups, chords, retry strategies, scheduled tasks...

Set up dead-letter queues and exchanges in RabbitMQ with TTL expiry, max length limits, rejection-based routing, and retry patterns for...

Create a RabbitMQ consumer and producer in Python using pika with durable queues, work dispatching, acknowledgments, dead-letter exchanges,...

Build real-time pub/sub messaging with Redis and Python including pattern subscriptions, message serialization, connection pooling, and...

Minimize Lambda cold start latency using provisioned concurrency, ARM64 Graviton, lighter dependencies, and initialization code...

Package Python dependencies for AWS Lambda using Lambda Layers, Docker builds for native extensions, and SAM/Serverless Framework...

Create HTTP-triggered Azure Functions in Python with binding configuration, async handlers, dependency injection, and deployment via Azure...

Create and deploy HTTP-triggered Cloud Functions on Google Cloud with Node.js, Express integration, secrets management, and gcloud CLI...

Implement custom Lambda authorizers for API Gateway with JWT validation, IAM policy generation, and caching for token-based authentication...

Design a DynamoDB single-table schema with composite keys, GSI patterns, and access patterns for serverless applications using Python and...

Process SQS messages with Lambda using batch windows, partial batch responses, error handling, and dead-letter queues for resilient...

Build state machine workflows with AWS Step Functions using sequential, parallel, and map states for orchestrating Lambda functions and...

Dynamically select which tools an LLM agent can use based on the task context. Reduce token usage and improve decision quality by narrowing...

Cache LLM embeddings to reduce API calls and cost. Store embeddings with a content hash key and serve from cache on repeated inputs.

Pause LLM agent execution for human approval before high-impact actions. Route decisions to a reviewer when confidence is low or stakes are...

Fall back to alternative LLM providers or models when the primary fails. Handle rate limits, timeouts, and errors gracefully with a...

Validate LLM inputs and outputs with rules, classifiers, and content filters. Prevent prompt injection, toxic content, and data leakage...

Route queries to different LLM models based on complexity, cost, and latency requirements. Classify input before dispatching to the right...

Chain multiple LLM calls where each step's output feeds the next step's input. Break complex tasks into smaller, verifiable prompts for...

Combine keyword (BM25) and semantic (vector) search to improve retrieval accuracy in RAG pipelines. Fuse ranked results using reciprocal...

Run two identical environments and switch traffic between them. Deploy to the idle environment, test it, then flip the router for instant...

Strategies for keeping cached data fresh: TTL expiration, explicit invalidation, write-through, and event-driven cache eviction.

Prevent thundering herd cache misses with locks, single-flight, and early refresh strategies to protect the database from concurrent...

Route a small percentage of traffic to the new version while the rest stays on stable. Monitor health metrics and gradually increase or...