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notes.

(17) essays on systems architecture, cloud infrastructure and production engineering

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September 7, 2026•9 min read•Subid Das

How to Cut Cloud Costs 30-40% Without Losing Reliability

Most cloud bills are inflated by idle capacity, unoptimized caching, and manual scaling — not by genuine load. Here's the audit sequence that actually finds the savings without risking uptime.

CloudDevopsAWSCost OptimizationInfrastructure

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August 31, 2026•9 min read•Subid Das

Offline-First Mobile Apps for Field Teams: What Breaks When You Skip It

Field staff, warehouse crews, and delivery teams work where connectivity is unreliable. An app that assumes constant internet doesn't just degrade — it fails. Here's how offline-first architecture actually works.

Mobile DevelopmentReact NativeOffline FirstField OperationsLogistics

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August 24, 2026•8 min read•Subid Das

Forward Deployed Engineering: Why Founders Choose an Embedded Senior Engineer Over an Agency

Hiring takes months. Agencies add layers between you and the code. Forward Deployed Engineering sprints give founders senior engineering velocity without either cost.

FDEEngineering ConsultingStartupsHiringEngineering Velocity

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August 17, 2026•10 min read•Subid Das

How to Automate Invoice & Document Processing: Cut Manual Data Entry by 90%

Manual invoice and contract entry doesn't scale. Here's how document intelligence pipelines with schema validation eliminate 90% of the manual review, and what to look for before you build one.

Ai AutomationDocument AiRAGBusiness AutomationOperations

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August 10, 2026•9 min read•Subid Das

Custom CRM vs HubSpot & Salesforce: Real Cost Comparison for Growing Businesses

HubSpot and Salesforce charge $100-300 per user, per month, for features most teams never touch. Here's what a custom CRM actually costs — and when it pays for itself.

CRMBusinessSaaSCost OptimizationCustom Software

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