Mathias Paulenko

Run Python asyncio in production with confidence. Covers event loops, task management, debugging, cancellation, timeouts, backpressure, and...

Master database sharding. Covers range-based, hash-based, and directory-based partitioning strategies, consistent hashing, shard key...

Master MongoDB indexing. Covers single field, compound, text, geospatial, TTL, wildcard, hashed indexes, ESR rule, covered queries, explain...

Master PostgreSQL replication. Covers streaming replication, logical replication, cascading replicas, synchronous commit, failover with...

Run Redis in production. Covers persistence (RDB, AOF), clustering, sentinel for HA, failover handling, memory management, eviction...

Optimize SQL queries. Covers EXPLAIN plan analysis, index strategies, join optimization, N+1 query detection, query rewriting, materialized...

Run Docker containers in production with confidence. Covers multi-stage builds, distroless images, health checks, image scanning, resource...

Implement GitOps with ArgoCD and Flux. Covers declarative infrastructure, drift reconciliation, automated rollbacks, progressive delivery,...

Master Kubernetes networking. Covers Services, Ingress, NetworkPolicies, CNI plugins, DNS, service mesh, load balancing, external traffic,...

Build a production monitoring stack. Covers Prometheus, Grafana, AlertManager, metrics instrumentation, alert rules, runbooks, SLI/SLO/SLA,...

Manage infrastructure as code with Terraform in production. Covers modules, state management, workspaces, drift detection, remote backends,...

Reduce JavaScript bundle size. Covers tree shaking, code splitting, dynamic imports, dependency analysis, module federation, lazy loading,...

Master modern CSS layout with Grid and Flexbox. Covers grid templates, areas, subgrid, responsive layouts, flexbox alignment, wrapping,...

Master React 19 features. Covers server components, use() hook, actions, form actions, useActionState, useOptimistic, useFormStatus, ref as...

Optimize Core Web Vitals. Covers LCP, INP, CLS measurement and improvement, image optimization, font loading, render-blocking resources,...

Design and operate event-driven backends. Covers event sourcing, CQRS, sagas, outbox pattern, idempotency, eventual consistency, and...

Run Apache Kafka in production with confidence. Covers partitions, replication, consumer groups, monitoring, performance tuning, and...

Design and operate RabbitMQ for reliable messaging. Covers exchanges, queues, bindings, routing patterns, dead letter queues, clustering,...

Secure your APIs end-to-end. Covers rate limiting, authentication, input validation, CORS, SQL injection prevention, API gateway patterns,...

Implement authentication in production. Covers JWT, OAuth2, session-based auth, passkeys, MFA, refresh tokens, token rotation, RBAC, ABAC,...

Mitigate each OWASP Top 10 2025 risk with practical code examples. Covers broken access control, cryptographic failures, injection,...

Manage application secrets securely in production. Covers HashiCorp Vault, AWS Secrets Manager, Azure Key Vault, GCP Secret Manager,...

Secure your software supply chain end-to-end. Covers SBOM generation, dependency scanning, Sigstore, SLSA framework, provenance...

Run AWS Lambda in production with confidence. Covers cold start optimization, layers, deployment patterns, observability with X-Ray,...