https://yk.streamerosai.com/blog Yaseen Khatib — Senior Full-Stack Developer (MERN) building production AI systems: Agentic RAG, LLM orchestration, and six solo-shipped products. Open to remote, hybrid, or on-site roles. en https://yk.streamerosai.com/blog/ai-engineer-portfolio-examples/ https://yk.streamerosai.com/blog/ai-engineer-portfolio-examples/ Fri, 30 Oct 2026 10:00:00 GMT Four kinds of AI engineer portfolio pieces that let a reviewer verify production experience in minutes: a live grounded assistant, a product with a readable trust boundary, a measured result, and the operating model. With this site as the worked example and its failures included. https://yk.streamerosai.com/blog/mern-stack-developer-vs-full-stack-developer/ https://yk.streamerosai.com/blog/mern-stack-developer-vs-full-stack-developer/ Fri, 30 Oct 2026 10:00:00 GMT Every MERN developer is a full-stack developer, but not the other way round. What MongoDB, Express, React and Node fix in place, where the two titles diverge in real work, and which one to hire or become. https://yk.streamerosai.com/blog/whatsapp-chatbot-saas-vs-owning-it/ https://yk.streamerosai.com/blog/whatsapp-chatbot-saas-vs-owning-it/ Fri, 23 Oct 2026 10:00:00 GMT What a WhatsApp chatbot really costs in India: Meta's per-message fees, WATI and Interakt plans over three years, and when an owned AI bot is cheaper. https://yk.streamerosai.com/blog/how-i-stop-re-renders-in-big-react-forms-uncontrolled-refs/ https://yk.streamerosai.com/blog/how-i-stop-re-renders-in-big-react-forms-uncontrolled-refs/ Mon, 03 Aug 2026 10:00:00 GMT Production tactics for large React forms: use uncontrolled inputs, refs, and event delegation to kill keystroke re-renders while keeping validation sane. https://yk.streamerosai.com/blog/how-i-orchestrate-react-with-a-typed-event-bus/ https://yk.streamerosai.com/blog/how-i-orchestrate-react-with-a-typed-event-bus/ Wed, 29 Jul 2026 10:00:00 GMT A production pattern I use to coordinate React components without prop drilling or store-bloat: a strictly typed event bus with React-safe hooks. https://yk.streamerosai.com/blog/optimistic-react-uis-that-dont-drift-from-the-server/ https://yk.streamerosai.com/blog/optimistic-react-uis-that-dont-drift-from-the-server/ Mon, 27 Jul 2026 10:00:00 GMT How I ship optimistic UI in React without state drift: versioned writes, idempotency keys, React Query/Zustand patterns, and the rollback math. https://yk.streamerosai.com/blog/when-usememo-actually-helps-in-react-19-and-how-to-measure-it/ https://yk.streamerosai.com/blog/when-usememo-actually-helps-in-react-19-and-how-to-measure-it/ Fri, 24 Jul 2026 10:00:00 GMT A blunt, practical guide to useMemo in React 19: where it genuinely helps, where it’s noise, and how to profile renders before you cargo‑cult memoization. https://yk.streamerosai.com/blog/stop-mixing-render-and-domain-state-in-react-dashboards/ https://yk.streamerosai.com/blog/stop-mixing-render-and-domain-state-in-react-dashboards/ Wed, 22 Jul 2026 10:00:00 GMT A pragmatic split for large React 18 dashboards: keep server/domain data out of UI stores, cut re-renders and payloads with a thin serialization adapter. https://yk.streamerosai.com/blog/my-journey-web-developer-to-ai-engineer/ https://yk.streamerosai.com/blog/my-journey-web-developer-to-ai-engineer/ Mon, 20 Jul 2026 10:00:00 GMT Five years, honestly told: an ASP.NET healthcare backend in 2021, full-stack MERN through the ChatGPT shift, nights of embeddings homework, and finally shipping five AI products solo. The journey, without the gloss. https://yk.streamerosai.com/blog/zero-network-leakage-in-ci-deny-by-default-egress-harness/ https://yk.streamerosai.com/blog/zero-network-leakage-in-ci-deny-by-default-egress-harness/ Fri, 17 Jul 2026 10:00:00 GMT A practical, cross-platform harness to prove your desktop app makes zero outbound network calls in CI by default—block, log, count, and assert. https://yk.streamerosai.com/blog/unifying-twitch-and-youtube-live-chat-ordered-de-duplicated/ https://yk.streamerosai.com/blog/unifying-twitch-and-youtube-live-chat-ordered-de-duplicated/ Thu, 16 Jul 2026 10:00:00 GMT Build a single, ordered, de-duplicated event stream from Twitch IRC and YouTube Live Chat with Hybrid Logical Clocks, watermarks, and idempotent delivery. https://yk.streamerosai.com/blog/serverless-local-first-settings-sync-over-lan-with-automerge-mdns/ https://yk.streamerosai.com/blog/serverless-local-first-settings-sync-over-lan-with-automerge-mdns/ Tue, 14 Jul 2026 10:00:00 GMT Replicate user settings across devices on the same LAN without servers by combining Automerge CRDT sync messages with mDNS peer discovery and a tiny TCP transport. https://yk.streamerosai.com/blog/zero-account-auth-device-bound-identity-capability-tokens/ https://yk.streamerosai.com/blog/zero-account-auth-device-bound-identity-capability-tokens/ Sun, 12 Jul 2026 10:00:00 GMT Build secure apps without accounts or an auth server: bind identity to device keys, mint PASETO capability tokens, and enforce DPoP for stateless, least-privilege access. https://yk.streamerosai.com/blog/shipped-5-products-solo-12-months/ https://yk.streamerosai.com/blog/shipped-5-products-solo-12-months/ Tue, 07 Jul 2026 10:00:00 GMT Five production systems — a realtime telemetry cockpit, a workflow engine, a local-first AI finance agent, and two autonomous pipelines — designed, built, and shipped by one engineer. Here's the operating model. https://yk.streamerosai.com/blog/vision-over-syntax-architecture-first/ https://yk.streamerosai.com/blog/vision-over-syntax-architecture-first/ Tue, 07 Jul 2026 10:00:00 GMT Syntax is solved; vision is not. How architecture-first thinking — data contracts, trust boundaries, and deliberate refusals — is the real engineering skill in the AI era, shown through shipped products. https://yk.streamerosai.com/blog/one-architect-claude-mcp-full-squad/ https://yk.streamerosai.com/blog/one-architect-claude-mcp-full-squad/ Tue, 07 Jul 2026 10:00:00 GMT The exact three-layer operating model — architect, Claude Code, MCP-wired systems — that lets one engineer ship like a squad, and the 30-day plan for installing it inside a real company. https://yk.streamerosai.com/blog/ai-finops-playbook-stop-burning-money/ https://yk.streamerosai.com/blog/ai-finops-playbook-stop-burning-money/ Tue, 07 Jul 2026 10:00:00 GMT Most production AI traffic is simple or repetitive, yet it's billed at frontier-model prices. The cache → flash → frontier cascade that fixes the economics, with a live interactive cost simulator. https://yk.streamerosai.com/blog/linkedin-pipeline-job-search-runs-itself/ https://yk.streamerosai.com/blog/linkedin-pipeline-job-search-runs-itself/ Tue, 07 Jul 2026 10:00:00 GMT How I engineered consistency: an autonomous GitHub Actions pipeline that turns real work into scheduled LinkedIn posts, tracks state in Git, costs $0 to run — and what the same pattern automates inside a company. https://yk.streamerosai.com/blog/zero-dollar-content-engine/ https://yk.streamerosai.com/blog/zero-dollar-content-engine/ Tue, 07 Jul 2026 10:00:00 GMT A cron-scheduled pipeline drafts articles with Gemini, writes MDX, commits to Git, and redeploys the static site — no CMS, no server, no database, no bill. The architecture of refusing infrastructure. https://yk.streamerosai.com/blog/sable-ai-agent-never-touches-money/ https://yk.streamerosai.com/blog/sable-ai-agent-never-touches-money/ Tue, 07 Jul 2026 10:00:00 GMT Sable is a local-first AI financial agent: all data in on-device SQLite, no cloud backend, and a Review & Confirm boundary where the model proposes but only a human commits. The trust architecture, explained. https://yk.streamerosai.com/blog/hire-my-head-not-my-hands/ https://yk.streamerosai.com/blog/hire-my-head-not-my-hands/ Tue, 07 Jul 2026 10:00:00 GMT AI made hands abundant; heads stayed scarce. The closing argument of the Founder's Log series — the architectural judgment pattern across five shipped products, addressed to the person deciding whether to interview me. https://yk.streamerosai.com/blog/websocket-telemetry-at-scale/ https://yk.streamerosai.com/blog/websocket-telemetry-at-scale/ Fri, 12 Jun 2026 10:00:00 GMT A single WebSocket server is a weekend project; streaming telemetry to thousands across instances broke for me on streamerOS — Redis pub/sub, rooms, coalescing. https://yk.streamerosai.com/blog/optimizing-mongodb-aggregation/ https://yk.streamerosai.com/blog/optimizing-mongodb-aggregation/ Thu, 11 Jun 2026 10:00:00 GMT Profiling a clinical API taught me MongoDB aggregation pipeline optimization lives or dies on stage order: $match first on indexes, $lookup join performance, then explain. https://yk.streamerosai.com/blog/mastering-claude-architecture-context-windows-output-limits/ https://yk.streamerosai.com/blog/mastering-claude-architecture-context-windows-output-limits/ Wed, 10 Jun 2026 10:00:00 GMT The Claude context window is one token budget shared by prompt, tools, thinking, and reply. I count tokens and guard it in code so a reply never truncates. https://yk.streamerosai.com/blog/ai-native-portfolio-landing-lead-roles/ https://yk.streamerosai.com/blog/ai-native-portfolio-landing-lead-roles/ Mon, 08 Jun 2026 10:00:00 GMT A portfolio that lists 'used ChatGPT' reads junior. One that demonstrates systems architecture — RAG, agents, guardrails, latency budgets — reads like the lead they're trying to hire. Here's how to build the second one. https://yk.streamerosai.com/blog/the-10x-reality-ai-replaced-the-mern-squad/ https://yk.streamerosai.com/blog/the-10x-reality-ai-replaced-the-mern-squad/ Sat, 06 Jun 2026 10:00:00 GMT AI shifted the engineer's job from writing syntax to directing architectural flow. Why one architect with Claude now outships a traditional 10-person MERN squad. https://yk.streamerosai.com/blog/chatgpt-changed-full-stack-engineering/ https://yk.streamerosai.com/blog/chatgpt-changed-full-stack-engineering/ Sat, 06 Jun 2026 10:00:00 GMT Late 2022 dropped the cost of writing software overnight. Why the bottleneck moved from syntax to judgment — and why MERN engineers were positioned to win. https://yk.streamerosai.com/blog/react-flow-agent-orchestration-canvas/ https://yk.streamerosai.com/blog/react-flow-agent-orchestration-canvas/ Fri, 05 Jun 2026 10:00:00 GMT On IntegrateX, the React Flow graph a PM drags is the exact spec the runtime executes — typed nodes and ports make it a debuggable agent orchestration layer. https://yk.streamerosai.com/blog/94-percent-payload-reduction-react-flow/ https://yk.streamerosai.com/blog/94-percent-payload-reduction-react-flow/ Thu, 04 Jun 2026 10:00:00 GMT Node-graph editors serialize enormous JSON. A custom Serialization Adapter pattern that separates the React Flow render model from the transport record cut IntegrateX payloads by 94%. https://yk.streamerosai.com/blog/llm-observability-opentelemetry-tracing/ https://yk.streamerosai.com/blog/llm-observability-opentelemetry-tracing/ Wed, 03 Jun 2026 10:00:00 GMT The live RAG concierge on this site ships a span per step — tokens, cost, latency in OpenTelemetry — which is how I trace LLM agents, not guess from logs. https://yk.streamerosai.com/blog/compiling-react-flow-graph-agent-pipeline/ https://yk.streamerosai.com/blog/compiling-react-flow-graph-agent-pipeline/ Wed, 03 Jun 2026 10:00:00 GMT On IntegrateX a React Flow canvas stayed inert until I compiled it: a dependency map, a topological sort into a runnable plan, and cycle detection before it runs. https://yk.streamerosai.com/blog/prompt-caching-deep-dive-latency-cost/ https://yk.streamerosai.com/blog/prompt-caching-deep-dive-latency-cost/ Tue, 02 Jun 2026 10:00:00 GMT I treat prompt caching as FinOps: order the static prefix first, keep it byte-stable, and stop re-paying to re-read an 8K preamble on every request. https://yk.streamerosai.com/blog/semantic-caching-edge-rag/ https://yk.streamerosai.com/blog/semantic-caching-edge-rag/ Tue, 02 Jun 2026 10:00:00 GMT The streamerOS support agent kept re-answering the same question phrased ten ways, so I built a semantic cache that matches meaning, not the string. https://yk.streamerosai.com/blog/real-time-telemetry-websockets-react/ https://yk.streamerosai.com/blog/real-time-telemetry-websockets-react/ Sun, 31 May 2026 10:00:00 GMT Polling dashboards lie between ticks — I learned that the hard way. Now I push telemetry over WebSockets for sub-second parity across every React client.