DevOps

Abstract vault door with glowing key shards reassembling.

Inside HashiCorp Vault: Unsealing, Audit Logs, and Transit Encryption

A practitioner’s tour of three Vault primitives engineers touch daily — the Shamir-based unseal flow, the tamper-evident audit log device, and the stateless transit encryption engine — with concrete config and production patterns.

A backend engineer's laptop showing a terminal with OpenClaw commands and a project dashboard.

Your First 7 Days with OpenClaw: A Field Guide for Backend Engineers

Seven days of hands-on notes on OpenClaw: what to install, what to configure, how to model real workloads, and the operational habits that separate a successful rollout from a stalled one.

Diagram of Linux namespaces and cgroups forming a container runtime.

Build a 300-Line Container Runtime in Go: A CV-Worthy Side Project

Build a working container runtime in roughly 300 lines of Go, using Linux namespaces and cgroups. A side project that signals real systems engineering chops on a CV.

Illustration of encrypted data flowing through a network tunnel.

Mastering TLS 1.3 Zero Round-Trip Resumption: Latency Optimization, Security Trade-offs, and Real-World Implementation

Zero round‑trip resumption in TLS 1.3 can cut handshake latency dramatically while preserving strong security—learn the patterns, pitfalls, and production‑ready implementations.

Diagram of a Celery worker processing tasks from a message broker.

Mastering Celery: Architecting Robust Distributed Task Queues for Production-Ready Python Applications

A deep‑dive into Celery’s architecture, scaling tactics, and observability practices that let engineers ship reliable distributed Python workloads.