The notes I would have wanted at fifteen.
Long form pieces on shipping production systems, scaling SaaS, hiring engineers, AI integration, and the engineering decisions behind Yashveer Labs.
799 posts · page 5 of 34
- Web App and Frontend Development
Responsive Design vs Adaptive Design vs Mobile First
Responsive design, adaptive design, and mobile-first are different approaches to building UIs that work across devices. Teams that conflate them build products that work poorly on the device class that matters most for their users.
6 min read
- Backend, APIs, and System Design
Resilience Patterns: Circuit Breakers, Retries, Bulkheads
Distributed systems fail in partial ways. A service that handles partial failures gracefully stays up when dependencies degrade. Here is how circuit breakers, retries, and bulkheads work and when to use each.
6 min read
- DevOps, Deployment, Infrastructure
Reserved Instances, Savings Plans, Spot: The Saving Map
AWS has three distinct mechanisms for reducing compute costs below on-demand pricing. Using the wrong one for a workload leaves money on the table or creates unnecessary interruption risk. Here is the map.
6 min read
- Software Costs and Budgeting
Reserved Instances and Cost Math: When They Pay Off
Reserved instances offer significant discounts over on-demand pricing, but only if the commitment matches actual usage. Here is how to run the math before committing and how to avoid reserving resources you will not fully use.
6 min read
- Comparisons and Vendor Decisions
Resend vs Postmark vs SendGrid vs Mailgun
Four credible transactional email services with different strengths. Resend leads on developer experience, Postmark on deliverability consistency, SendGrid on feature breadth, and Mailgun on price at mid-volume. Here is how to choose.
6 min read
- Comparisons and Vendor Decisions
Resend vs AWS SES vs Mailgun for Transactional Email
Transactional email services differ significantly in deliverability, developer experience, and pricing at scale. Here is how Resend, AWS SES, and Mailgun compare for SaaS products in 2026.
6 min read
- Business Automation and Ops
Renewals and Expansion Revenue Automation
Renewal and expansion revenue from existing customers is more efficient than new customer acquisition. Automating the workflows that drive renewals and upsells turns this principle into predictable revenue.
6 min read
- Comparisons and Vendor Decisions
Render vs Fly.io vs Railway vs Heroku in 2026
Heroku pioneered the deploy-from-git model, but it has been surpassed by alternatives that offer better pricing, more control, and modern infrastructure. Here is how Render, Fly.io, Railway, and Heroku compare in 2026.
6 min read
- Business Automation and Ops
Refund Automation Without Customer Friction
Manual refund processes create support tickets, slow resolution, and unhappy customers. Automated refund systems handle the common cases instantly while routing exceptions to human review. Here is how to build one.
6 min read
- Tech Debt and Refactoring
Refactoring Without a Test Suite: A Survival Guide
The ideal refactor starts with a full test suite. Most real refactors do not. Here is how to refactor code safely when the safety net does not exist and adding tests first is not feasible.
6 min read
- Tech Debt and Refactoring
Refactoring User Sessions Without Logging Anyone Out
Session architecture changes are among the riskiest refactors because doing them wrong logs out every user simultaneously. Here is the migration strategy that preserves session continuity through the transition.
6 min read
- Tech Debt and Refactoring
Refactor Stories That Saved a Startup
Not all refactors stall companies. Some unlock growth that was blocked by the existing architecture. These are the patterns that make refactoring a business decision rather than a technical indulgence.
6 min read
- Tech Debt and Refactoring
Refactor Stories That Killed a Startup
Refactoring is necessary and valuable. It is also one of the most reliable ways to destroy momentum at the wrong moment. These are the patterns that turn a reasonable engineering goal into a business catastrophe.
6 min read
- Hiring Developers, Freelancers, and Agencies
Red Flags in a Developer's Portfolio
A developer's portfolio tells you more than the projects listed. The way work is presented, what is omitted, and how decisions are explained reveal things that an interview cannot always surface.
6 min read
- Hiring Developers, Freelancers, and Agencies
Recruiter Mistakes That Repel Senior Engineers
Senior engineers receive many more recruiting messages than they respond to. The ones that get ignored share predictable patterns. Here is what those patterns are and how to avoid them.
6 min read
- MVP Development and Startup Builds
Realistic MVP Development Timelines: What Nobody Tells You
Most MVP timeline estimates are wrong in predictable ways. Here is where the time actually goes, why discovery always runs longer than planned, and how to build a realistic timeline that accounts for what actually slows things down.
6 min read
- Performance Optimization
Real User Monitoring vs Synthetic Monitoring: Both, Not Either
Real user monitoring and synthetic monitoring answer different questions about application performance. Choosing one over the other leaves performance blind spots. Here is how to use both together.
6 min read
- Web App and Frontend Development
Real Time Collaboration: A Web App Engineering Primer
Real-time collaboration features like shared editing, live cursors, and instant updates require specific architectural choices. Here is the engineering foundation that separates robust implementations from ones that break under concurrent edits.
6 min read
- SaaS Architecture and Scaling
Read Replicas: When They Save You and When They Lie to You
Read replicas distribute database read load and improve availability, but replication lag creates consistency hazards that catch teams off guard. Here is when read replicas help and when they introduce subtle bugs.
6 min read
- Web App and Frontend Development
React Query vs SWR vs RTK Query
React Query, SWR, and RTK Query all manage server state in React applications, but they make different trade-offs around complexity, bundle size, and Redux integration. Here is how to choose between them.
6 min read
- Cross Platform and Mobile Development
React Native Performance: The Patterns That Make It Production Ready
React Native apps that feel slow usually have fixable causes: excessive re-renders, large JavaScript bundles, synchronous work on the main thread. Here are the patterns that produce apps users do not notice are cross-platform.
6 min read
- Cross Platform and Mobile Development
React Native New Architecture: What Founders Should Know
React Native's new architecture eliminates the JavaScript bridge that limited performance for years. Here is what changed, what it means for existing apps, and whether it is worth migrating now.
6 min read
- Backend, APIs, and System Design
Rate Limiting Algorithms Compared: Token Bucket, Leaky Bucket, Fixed Window
Rate limiting protects APIs from abuse and overload, but the algorithm choice determines whether users experience smooth degradation or hard cutoffs. Here is how each algorithm behaves and when to use which.
6 min read
- AI Integration and Vibe Coding Rescue
RAG (Retrieval Augmented Generation) for SaaS: When It Helps and When It Does Not
RAG is the right architecture for some AI problems and entirely the wrong approach for others. Here is how to tell the difference and what to build when RAG is the right call.
6 min read
More than blog posts.
The Labs folder has the experiments themselves. The Systems folder has the stack and architecture. The Journey folder has the timeline. Pick whichever pulls you.