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.
The Engineering Skills That Compound
Compounding engineering skills are the ones where additional experience produces nonlinear improvement in capability. A skill that compounds is one where a decade of practice produces a practitioner who is not just faster than a practitioner with one year of experience, but categorically more capable. Systems thinking, debugging complex systems, technical communication, and domain expertise are compounding. Specific syntax knowledge and tool familiarity are not: they can be learned quickly, and they become obsolete just as fast.
Recruiter and Career PositioningThe Engineering Career After AI Coding Tools
AI coding tools have changed what takes time in engineering. The hours previously spent on boilerplate, standard patterns, and syntax lookup are now recoverable. What they have not changed: the judgment required to define the problem correctly, the architectural thinking required to design systems that will not fail, and the product sense required to build things that users actually need. The engineers who thrive are the ones who use AI tools to increase their output and redirect the saved time toward the skills that are harder to automate.
Recruiter and Career PositioningThe Quiet Path to Principal Engineer
Principal engineer is the level where individual technical judgment shapes the systems, decisions, and practices of an entire organization, not just a team. The path is quieter than most engineers expect. It is built through written technical opinion, consistent influence on decisions you were not asked to weigh in on, and the accumulated trust of engineers who defer to your judgment without being told to.
Recruiter and Career PositioningWhy Some Engineers Stay Junior For A Decade
An engineer who stays junior for a decade is rarely lacking in talent. They are missing the experiences that build seniority: end to end ownership of real systems, exposure to consequences, and feedback from people more senior than them. The seniority gap is built by habit and opportunity, and it can be closed at any point with deliberate work.
Recruiter and Career PositioningThe Engineering Career Plateau and How to Break It
An engineering career plateau is the period when an engineer is performing well at their current level but not progressing to the next one. Most plateaus are not caused by insufficient technical skill. They are caused by a mismatch between the impact the engineer is creating and the impact required for the next level. Understanding this distinction is the first step to breaking the plateau.
Recruiter and Career PositioningThe Engineer Investor: From Building to Backing
The engineer investor is someone who has spent years building software and decides to put capital, time, or reputation behind other builders. The transition is not a career exit. It is a career addition. The edge comes from being able to evaluate technical risk directly, not from learning finance theory. Most engineers who do this start earlier and smaller than they think is necessary.
Recruiter and Career PositioningThe Productized Service: An Engineer's Path to Leverage
A productized service is a consulting offer scoped tightly enough to have a fixed price, a defined deliverable, and a repeatable delivery process. For engineers, it converts a skill into a business model that does not require constant rescoping, reselling, or explaining what you do. The leverage comes from the system, not the individual engagement. Most engineers who do this generate more income per hour than their employment ever produced.
Recruiter and Career PositioningThe Engineering Side Project That Becomes a Career
The engineering side project that becomes a career is not the project that impresses interviewers. It is the project that demonstrates capability a resume cannot capture. A side project that has real users, handles production load, solves a genuine problem, and was built without the scaffolding of a professional environment proves things about the engineer that a list of employer names cannot. The difference between side projects that change a career and side projects that pad a resume is evidence of judgment, persistence, and genuine problem solving.
Recruiter and Career PositioningThe Engineering Blog That Lands Jobs and Clients
An engineering blog that generates career opportunities is not a blog that demonstrates you know how to code. It is a blog that demonstrates how you think about specific technical problems in specific domains. The posts that generate inbound from employers and clients are the ones where the reader thinks 'this person has already solved the problem I have' and decides to reach out. That is a fundamentally different goal from demonstrating general competence.
Recruiter and Career PositioningThe Tech Lead vs Engineering Manager Decision
Tech lead and engineering manager look like adjacent steps and are actually different careers. Tech leads optimize systems and ship code. Engineering managers optimize people and ship through others. The skills overlap less than the title suggests, and choosing the wrong one out of obligation rather than fit is one of the most common career mistakes in software.
Recruiter and Career PositioningThe Staff Engineer Track: What It Actually Looks Like
Staff engineer is the individual contributor level above senior where the scope of responsibility expands from a team's systems to a product area or cross team technical domain. The job is less about writing excellent code and more about shaping the technical decisions that let other engineers write excellent code. Most engineers are unprepared for how different the work feels after the promotion, because the signals that earned the promotion are no longer the primary signals of success.
Recruiter and Career PositioningThe Mid Career Engineer's Strategic Moves
The mid career engineer is typically three to seven years into the profession, competent at individual technical execution, and uncertain about how to progress further. The moves that accelerate progression to senior engineer and beyond are not primarily technical: they are about expanding scope (owning systems and outcomes rather than tasks), building visibility (making impact legible to the people who make career decisions), and developing judgment (knowing which problems to solve and which to leave alone). Technical skill is necessary but not sufficient.
Recruiter and Career PositioningThe Generalist vs Specialist Engineer Debate
The generalist vs specialist debate in engineering is not about which is better; it is about which is better for a specific stage of career and a specific type of company. Generalists are highest value at early stage startups, where the problem space is changing rapidly and engineers need to cover multiple functions. Specialists are highest value at later stage companies, where the problem space is defined and deep expertise in a specific area produces compounding returns. Most successful senior engineers develop a T shape: broad capability with deep expertise in one or two areas.
Recruiter and Career PositioningThe System Design Interview: A Practical Study Plan
The system design interview tests your ability to scope a problem under ambiguity, ask the right questions, propose a working architecture, and reason about tradeoffs. The fastest preparation is not memorizing canonical solutions to famous problems. It is practicing the conversation pattern: clarify, propose, defend, refine. The patterns repeat. The skill is in delivering them under pressure.
Recruiter and Career PositioningThe Behavioral Interview for Engineers: A Real Framework
The behavioral interview is the part of the engineering hiring process that most engineers underestimate. Technical skills get you the screen. Communication, judgment, and self-awareness get you the offer. Behavioral questions are not soft. They are the hiring manager's best signal for how you will operate under ambiguity, under conflict, and under pressure.
Recruiter and Career PositioningThe Engineering Cover Letter That Still Works
Most engineering cover letters fail because they describe the candidate's background rather than the employer's problem. The cover letter that works treats the hiring manager as someone with a specific need and demonstrates, in two or three paragraphs, that you understand the need and have already solved something like it. It is not a summary of the resume. It is an argument for why this candidate is the right person for this problem.
Recruiter and Career PositioningThe GitHub Profile That Recruiters Read in Thirty Seconds
The GitHub profile that recruiters read in thirty seconds has three things: a profile README that communicates what you build and what you are looking for, two or three pinned repositories with clear descriptions and READMEs that show the work, and recent commit activity that demonstrates current engagement with code. Most GitHub profiles are either empty or cluttered with unmaintained forks and tutorial projects. The profiles that stand out take 30 minutes to optimize and demonstrate real capability to anyone who looks.
Web App and Frontend DevelopmentThe Frontend Build System: Why It Matters More Than Founders Think
The frontend build system is the toolchain that transforms source code into optimized production assets: TypeScript compilation, module bundling, code splitting, tree shaking, asset optimization, and deployment packaging. Founders who do not understand the build system cannot evaluate build performance problems, cannot make informed decisions about tooling choices, and cannot understand why the application performs well or poorly in production. The build system is the infrastructure layer of the frontend: invisible when it works, visible when it fails.
Web App and Frontend DevelopmentVisual Regression Testing for Design Heavy Sites
Visual regression testing compares screenshots of your UI against an approved baseline and flags pixel level differences. For sites whose value is partly aesthetic, it catches the bugs functional tests cannot see: a misaligned card, a broken spacing rule, a layout that collapsed at one specific breakpoint. The setup cost is hours. The cost of shipping visual regressions to users is much higher.
Web App and Frontend DevelopmentThe Frontend Testing Strategy That Works
A frontend testing strategy that works is one that tests user visible behavior rather than implementation details, uses the right tool for each type of test, and produces a test suite that can be maintained without constant rewriting as the implementation changes. The three layers that deliver the most value: unit tests for pure functions and custom hooks, integration tests for components that render real behavior (React Testing Library, not Enzyme), and end to end tests for the critical user paths that must work for the business to function.
Web App and Frontend DevelopmentThe Web Performance Toolkit Every Senior Frontend Engineer Uses
Senior frontend engineers do not guess at performance problems. They have a small, reliable set of tools they reach for on every project, and they know what each one tells them. The toolkit is not exotic. Most of it is free. The difference is the discipline to use it consistently and read the results without flinching.
Web App and Frontend DevelopmentThe Modern Three D on the Web: Three.js and Beyond
Three dimensional rendering on the web uses WebGL (or the newer WebGPU) to draw GPU accelerated 3D graphics in a browser canvas element. Three.js is the dominant JavaScript library for WebGL, providing a scene graph, camera system, lighting model, and material system that abstracts the raw WebGL API. React Three Fiber (R3F) integrates Three.js with React's component model, allowing 3D scenes to be composed with JSX and managed with React's state and lifecycle. The decision to add 3D to a web product is a significant performance and complexity tradeoff that is appropriate for specific use cases and inappropriate for most.
Web App and Frontend DevelopmentThe Mobile Web Experience That Converts
The mobile web experience that converts is a web application that loads fast on cellular connections, is comfortable to use with thumbs, responds immediately to touch, and does not require the user to zoom or scroll horizontally to access content. The technical decisions that produce this experience (image optimization, font loading strategy, tap target sizing, layout design) are different from the decisions that produce a good desktop experience, and they matter more because the majority of web traffic comes from mobile devices.
Web App and Frontend DevelopmentWebSockets vs Server Sent Events vs Long Polling
WebSockets are bidirectional and stateful, the right choice for chat and collaborative editing. Server Sent Events flow one way, from server to client, and are cheaper and simpler for live updates and feeds. Long polling is a fallback that works everywhere but pays request overhead per message. Pick by traffic shape, infrastructure constraints, and whether you actually need two way communication.