The Journal
The notes I would have wanted at fifteen.
Long-form notes on shipping production systems, scaling SaaS, hiring engineers, AI integration, and the engineering decisions behind Yashveer Labs — written by founder Yashveer Singh.
AI Assisted Code Review: A Process That Actually Helps
AI assisted code review works when the AI runs first, the human runs second, and the scope is narrow. The AI catches typos, missing tests, security smells, and style drift. The human handles architecture, intent, and tradeoffs. Teams that flip the order get worse review quality and slower throughput. The discipline is using each side for what it is good at.
MVP Development and Startup BuildsAgile for Early Stage Startups: What Actually Matters
Agile for a five person startup is not the agile that lives in a manifesto. It is three habits. A weekly demo of working software. A short list of what you are working on next. A written reason for every cut you make to the plan. The rest is theater. The teams that hold the three habits ship. The teams that import the whole framework spend more time in ceremonies than in code.
Hiring Developers, Freelancers, and AgenciesAgencies That Win Founder Trust: What They Do Differently
The agencies founders recommend to other founders share four habits. Honest scope, weekly demos, a single named owner, and clean handovers. Every other variable, including price and process, matters less than these four. The agencies that miss on any of them tend to lose the client and the referral in the same quarter.
Tech Debt and RefactoringAdding Tests to a Legacy Codebase Without Going Mad
Adding tests to a legacy codebase that has never had them is not a refactor, it is an excavation. The work succeeds when it focuses on the highest risk seams first, accepts ugly tests as the price of safety, and trades coverage targets for confidence intervals. Below is the staged plan I use on rescue projects, and the rules I hold to when the tests get harder than the code.
Backend, APIs, and System DesignACID vs BASE: When Each Belongs in Your Architecture
ACID is the guarantee that a database transaction either fully succeeds or fully fails. BASE is the guarantee that a system remains available even when individual nodes disagree for a short time. Most production systems run both, in different layers. Picking the wrong one for the wrong workload costs you either data integrity or uptime.
MVP Development and Startup Builds7 MVP Mistakes That Destroy Startups Before They Launch
Most MVPs do not die because the market said no. They die because the founder, the developer, or both made one of seven decisions that quietly broke the project months before launch. This is the list, in the order I see them in my own client work, with the fix attached to each one.
Hiring Developers, Freelancers, and Agencies10 Questions Every Non Technical Founder Must Ask Before Hiring a Developer
If you are a non technical founder hiring your first developer, you do not need a degree in computer science. You need ten questions that force the conversation off the demo and onto reality. Below is the list I would use myself, written from the side of the table where the work actually gets shipped.
Comparisons and Vendor DecisionsTwilio vs MessageBird vs Vonage for SMS and Voice
Twilio is the developer default for SMS and voice, with the widest SDK coverage and the deepest ecosystem. MessageBird, now Bird, is the alternative built for global reach, with stronger delivery in markets where Twilio's coverage is thin. Vonage, now part of Ericsson, is the enterprise voice and unified communications option. The right pick depends on geography, call volume, and whether the team wants to own the integration or buy the platform.
Comparisons and Vendor DecisionsTinybird vs ClickHouse vs Cube for Analytics at Scale
Tinybird wraps ClickHouse in a managed API service built for real time analytics endpoints. ClickHouse is the columnar engine you run yourself or via ClickHouse Cloud. Cube is a semantic layer that sits above any warehouse to define metrics once and serve them consistently. Each solves a different problem, and picking the wrong one for your stage costs six months of the right one.
Comparisons and Vendor DecisionsWorkers vs Lambda vs Cloud Functions vs Edge Functions
Cloudflare Workers run V8 isolates on the edge, cheap and fast but constrained. AWS Lambda runs full Node or other runtimes regionally, flexible but with cold starts and higher cost. Google Cloud Functions sit in the middle. Edge functions from Vercel and others wrap a similar isolate model. The decision is about latency, runtime compatibility, and the cost trajectory.
Comparisons and Vendor DecisionsVanta vs Drata vs Secureframe for SOC 2 Automation
Vanta is the most recognized SOC 2 automation platform, expensive but well connected to auditors. Drata is the developer friendly alternative with deeper automation and a cleaner UI. Secureframe sits in the middle, with a strong customer success model and faster time to audit. The right call depends on auditor relationships, team size, and how much compliance process you want owned by a vendor versus your team.
Comparisons and Vendor DecisionsWebflow vs Framer vs Custom for Marketing Sites
Webflow is the most mature visual first CMS with the highest ceiling for non developers. Framer is the smoothest design tool for designers shipping their own sites. A custom Next.js site is the most flexible and the most expensive to maintain. The right choice is determined by who owns the site after launch, not by the splash screen.
Comparisons and Vendor DecisionsVercel vs Netlify vs Cloudflare Pages
Vercel is the best Next.js host with the best developer experience and the highest bill at scale. Netlify is the broadest platform for static sites plus functions, with a friendlier free tier. Cloudflare Pages is the cheapest at scale and lives closest to the edge, with the steepest learning curve for backend work. Pick by stack alignment, cost trajectory, and tolerance for platform constraints.
Business Automation and OpsThe Reporting Engine Every Founder Needs
The reporting engine every founder needs is the set of automated processes that pull data from billing, CRM, support, and product, combine it into a coherent view, and deliver it on a schedule without anyone having to request it. Most founders lack this. Instead they build reports manually before board meetings and investor updates, which is expensive in time and inconsistent in methodology across months.
Business Automation and OpsThe Marketing Automation Stack That Engineers Like
The marketing automation stack that engineers like is one where behavior is triggered by events, configuration is done in code or structured data rather than drag and drop GUIs, the data model is transparent, and the system integrates cleanly with the application via webhooks or a clearly documented API. The stacks that engineers dislike are the ones that treat the application as a data source for a separate marketing system that the engineering team cannot reason about, debug, or control from the codebase.
Business Automation and OpsThe Outbound Sales Automation Stack
The outbound sales automation stack is the set of tools that find, qualify, contact, and follow up with potential customers without requiring a full time SDR doing the work manually. It covers prospecting, enrichment, sequencing, and CRM sync. A well built stack can run a meaningful outbound motion on a few hours of founder attention per week.
Business Automation and OpsThe Sales Demo Booking Engine
The sales demo booking engine is the system, start to finish, that takes a prospect from interested to booked to shown up, with as little manual friction as possible. It covers the scheduling link, confirmation and reminder sequences, qualification routing, and the handoff to the CRM. When it works well, demos happen reliably, no show rates drop, and the founder does not spend mornings chasing confirmations.
Business Automation and OpsThe Founder Inbox Triage System
The founder inbox triage system is a structured approach to processing email, Slack, and other incoming messages that prevents the inbox from becoming the de facto task list and context switching machine. The system has three components: a twice daily inbox processing schedule (not continuous monitoring), a four category triage framework (respond now, respond later, delegate, archive), and a set of automation rules that sort incoming messages before the founder sees them.
Business Automation and OpsThe Internal Notification System for Founders
The internal notification system for founders is the set of automated alerts that surface business critical events without requiring the founder to actively monitor dashboards or check multiple tools. The design challenge is signal to noise: a founder who receives too many notifications learns to ignore them; a founder who receives too few misses events that require immediate response. The right system routes high signal events (new customer, production error, payment failure, support escalation) through distinct channels with appropriate urgency levels.
Business Automation and OpsThe Receipt and Invoice System Most SaaS Companies Underbuild
The receipt and invoice system is how a SaaS product creates, delivers, and stores the financial documents that customers and tax authorities expect when money changes hands. Most SaaS companies use Stripe's defaults until a customer asks for something Stripe does not produce, and then discover they have no system. Building a proper invoicing layer early is cheaper than the enterprise deal it saves later.
Business Automation and OpsThe Customer Support Ticket Routing Engine
A support ticket routing engine takes an incoming ticket and assigns it to the right person, team, or queue automatically. Without routing, every ticket lands in a shared inbox and someone manually decides who should handle it. That manual decision adds 5 to 30 minutes of latency per ticket and creates a bottleneck that does not scale past 50 tickets per day.
Business Automation and OpsThe Dunning Process Done Right
Dunning is the process of communicating with customers whose payments have failed and recovering the revenue. In SaaS, most payment failures are not customer intent to stop paying. They are card expirations, temporary bank holds, or updated card numbers that the customer forgot to update. A well designed dunning process recovers 60 to 80 percent of failed payments automatically, with only a small fraction requiring human intervention.
Business Automation and OpsThe Payout Engine: Marketplace Engineering at Scale
A payout engine is the system that collects money from buyers, holds it during a transaction, and releases it to sellers or service providers on a defined schedule minus the platform fee. In marketplaces with any meaningful volume, this system needs to be idempotent, auditable, and resilient to partial failures. Getting it right early saves months of painful remediation later.
Business Automation and OpsThe Subscription Billing Stack in 2026
The subscription billing stack is the combination of tools that handles recurring charges, dunning, proration, plan changes, invoicing, and revenue recognition for a SaaS business. Getting it right means customers are charged accurately, failed payments are recovered automatically, and the finance team has clean data. Getting it wrong means leaked revenue, angry customers, and a cleanup that drags on for months when you finally decide to fix it.