04 / TECHNICAL JOURNAL
Engineering Notes & System Decisions
Not generic blog posts or SEO tutorials. These are retrospective engineering journal entries documenting why systems were built, what broke in practice, how issues were investigated, and the technical decisions that survived into production.
WORK·Backend · Multi-Tenancy
7 min readManaging thousands of bank claims with request-scoped ContextVar isolation in FastAPI.
Engineering: Python · FastAPI · Upstream Frappe ODR · Docker · Nginx · Linux · ContextVar Isolation
System: Financial Desk & B2B PortalRead complete journal entry→ WORK·Architecture · Auth & Security
6 min readHow we built stateless OTP login and anti-enumeration defenses for legal arbitration notices.
Engineering: Rust (Leptos / WASM PWA) · Python FastAPI BFF · Upstream Frappe ODR · Docker · Nginx · Stateless HMAC Tokens · Anti-Enumeration
System: Resolution Desk · Litigant Dispute PlatformRead complete journal entry→ WORK·Systems · Rust / WASM & FastAPI
6 min readFrom an internal firm tool to a high-ranking public web utility with async connection pooling.
Engineering: Rust · WebAssembly (Yew) · FastAPI · Python · Docker Compose · Nginx · Linux
AUTOMATION·Pipelines · Scraping & Scheduling
7 min readExtracting daily cause-lists and orders from the High Court, DRT, and NCLT without human supervision.
Worked through: Playwright · Headless Chromium · PDF Extraction · Linux cron · SQLite Idempotency
System: Court Data AutomationRead complete journal entry→ AUTOMATION·Event-Driven · Webhooks & APIs
6 min readFrom one-click legal hearing scheduling to automated attendee recording distribution.
Worked through: Zoom OAuth · HMAC SHA-256 Webhooks · FastAPI Background Tasks · SendGrid · Docker
System: Legal Meeting AutomatorRead complete journal entry→ AUTOMATION·Automation · Browser Engineering
6 min readOvercoming QR re-authentication, anti-bot mechanisms, and dynamic DOM shifts.
Worked through: Selenium · Headless Chrome · Linux systemd · Session Persistence · Rate Limiting
System: Headless Outreach & Messaging DaemonRead complete journal entry→ LAB·Cloud · AWS & Networking
7 min readCIDR subnetting, NAT routing, ALB target groups, and least-privilege IAM policies.
Covered: AWS VPC · Subnets (Public/Private) · Route Tables · NAT Gateway · ALB · IAM
System: AWS Multi-Tier Networking & VPC LabRead complete journal entry→ LAB·DevOps · Infrastructure as Code
6 min readThe console VPC and the Terraform files visible in the repository recording.
Covered: Terraform · VPC · EC2 · RDS · S3 · ap-south-1
System: Declarative Cloud with TerraformRead complete journal entry→ LAB·DevOps · Docker & Linux Internals
6 min readFrom 800MB bloated images to 48MB distroless runtimes with proper PID 1 signal forwarding.
Covered: Docker Multi-Stage · Alpine/Distroless · Linux Namespaces · cgroups · SIGTERM Forwarding
System: Containerization & Linux System InternalsRead complete journal entry→ LAB·DevOps · Kubernetes & Orchestration
6 min readCluster orchestration, Service discovery, ConfigMaps, and zero-downtime rollouts.
Covered: k3s · Minikube · Ingress · ClusterIP · Readiness/Liveness Probes · ConfigMaps
System: Kubernetes Cluster Architecture LabRead complete journal entry→ LAB·DevOps · Prometheus & Telemetry
6 min readCapturing real runtime signals, p95 latencies, and USE method metrics.
Covered: Prometheus · Node Exporter · /metrics Scrape · PromQL p95 Latency · GitHub Actions
System: Observability & Telemetry StackRead complete journal entry→ LAB·Experiments · Autonomous Agents & Browser Intelligence
8 min readFrom a simple Playwright script to an autonomous workflow intelligence system.
Worked through: Python · Playwright · OpenAI API · BrowserUse · Blueprint Engine · Judge Rubric
LAB·Hardware & Edge · Linux & MQTT
6 min readManaging physical appliance relays, systemd daemons, and MQTT state synchronization.
Worked through: Raspberry Pi · Mosquitto MQTT · Python Daemon · Linux systemd · Optocoupled Relays
System: IoT Smart Home & MQTT ControllerRead complete journal entry→ LAB·AWS · Personal cloud lab
8 min readA personal AWS lab: dual-AZ subnets, public frontend instances, a private backend, and a single-AZ database.
Covered: AWS · Terraform · VPC · EC2 · RDS PostgreSQL 17 · Docker · GitHub Actions · Ansible
System: Cloud Expense TrackerRead complete journal entry→ LAB·Machine Learning · Data Engineering & Preprocessing
7 min readFrom zero-value data anomalies to SMOTE balanced training and PR-AUC threshold optimization.
Covered: Python · Scikit-Learn · Pandas · SMOTE · Random Forest · SVM · PR-AUC
System: EarlyWatch · Clinical Data ML PipelineRead complete journal entry→