Distributed systems, reliability, migrations and staff-level engineering judgment.https://ayushwing.com/https://ayushwing.com/blog/ten-years-of-building/https://ayushwing.com/blog/ten-years-of-building/SMB commerce, an e-commerce marketplace, a travel platform, an AI startup, cloud infrastructure — different domains, the same lessons. A map of everything I've written, and what I'd tell my 2015 self.Tue, 27 Oct 2026 03:20:00 GMTcareersoftwareengineeringdistributedsystemsarchitecturehttps://ayushwing.com/blog/ai-assisted-engineering/https://ayushwing.com/blog/ai-assisted-engineering/Claude Code, Cursor and MCP servers changed how I write tests, review code and explore unfamiliar systems — and changed nothing about who makes design decisions. Where AI tools help, where they don't, and the guardrails that make them safe on a team.Tue, 27 Oct 2026 03:19:00 GMTaiproductivitysoftwareengineeringllmhttps://ayushwing.com/blog/self-serve-platforms/https://ayushwing.com/blog/self-serve-platforms/If every request to your team becomes a ticket, your team is the bottleneck. How to find the requests worth automating, build guardrails so non-experts can run them safely, and measure whether self-serve actually worked.Tue, 27 Oct 2026 03:18:00 GMTplatformengineeringdevopsdeveloperexperienceleadershiphttps://ayushwing.com/blog/tech-debt-as-a-portfolio/https://ayushwing.com/blog/tech-debt-as-a-portfolio/"We need a refactor sprint" rarely gets approved; "this costs us two days every release" does. How to classify debt, measure its interest, pick what to pay first, and bundle paydown with work the business already wants.Tue, 27 Oct 2026 03:17:00 GMTtechdebtengineeringmanagementcareersoftwareengineeringhttps://ayushwing.com/blog/design-docs-that-get-approved/https://ayushwing.com/blog/design-docs-that-get-approved/A design doc is a decision record, not an essay. A one-page structure that gets to a decision quickly: context, goals and non-goals, options with trade-offs, the decision, risks and rollout — plus how to run the review.Tue, 27 Oct 2026 03:16:00 GMTsoftwarearchitectureleadershipcareerdocumentationhttps://ayushwing.com/blog/debugging-production/https://ayushwing.com/blog/debugging-production/The fastest production debuggers aren't the ones who know the most. They stop the bleeding first, build a timeline, ask what changed, and narrow the search by halves. A repeatable method for incidents.Tue, 27 Oct 2026 03:15:00 GMTdebuggingsreincidentsobservabilityhttps://ayushwing.com/blog/choose-a-database-by-access-pattern/https://ayushwing.com/blog/choose-a-database-by-access-pattern/List your queries first; the database choice mostly falls out. A practical guide to relational, key-value, document, search, graph and warehouse stores — with one real query for each — and when to use two.Tue, 27 Oct 2026 03:14:00 GMTdatabasesarchitecturesystemdesignbackendhttps://ayushwing.com/blog/business-workflows-as-state-machines/https://ayushwing.com/blog/business-workflows-as-state-machines/Many 'weird bugs' in order, refund and tenant systems are illegal state transitions. Make states and transitions explicit, enforce them in the database with a conditional write, and keep an audit trail.Tue, 27 Oct 2026 03:13:00 GMTarchitecturejavadatabasesdddhttps://ayushwing.com/blog/durable-workflows-vs-queue-and-cron/https://ayushwing.com/blog/durable-workflows-vs-queue-and-cron/If your job has more than three steps and must survive restarts, you're writing a workflow engine by hand. What queue + cron + status table turns into, what a durable workflow engine like Temporal gives you, and when it's overkill.Tue, 27 Oct 2026 03:12:00 GMTtemporaldistributedsystemsjavaarchitecturehttps://ayushwing.com/blog/strangler-fig-in-practice/https://ayushwing.com/blog/strangler-fig-in-practice/Big-bang rewrites stall; carving out one capability at a time works. How to pick the first slice, route traffic at the edge, prove the new path with shadow traffic, move data ownership — and know when to stop.Tue, 27 Oct 2026 03:11:00 GMTmicroservicesarchitecturemigrationsmonolithhttps://ayushwing.com/blog/expand-contract-migrations/https://ayushwing.com/blog/expand-contract-migrations/Renaming one column without downtime takes five deploys, and that's fine. The expand–contract pattern step by step: dual writes, batched backfills, verification, switching reads, and rolling back at every stage.Tue, 27 Oct 2026 03:10:00 GMTdatabasesmigrationsdevopsarchitecturehttps://ayushwing.com/blog/kafka-consumers-in-production/https://ayushwing.com/blog/kafka-consumers-in-production/Most Kafka incidents are consumer incidents. Partition keys and ordering, at-least-once processing, poison messages and dead-letter topics, rebalances, and the one metric to alert on.Tue, 27 Oct 2026 03:09:00 GMTkafkadistributedsystemsjavaeventdrivenhttps://ayushwing.com/blog/transactional-outbox/https://ayushwing.com/blog/transactional-outbox/"Save to the database, then publish to Kafka" loses events whenever the process dies in between. The outbox pattern fixes it with one extra table — here's how to build it, relay it and live with its trade-offs.Tue, 27 Oct 2026 03:08:00 GMTkafkadistributedsystemsmicroservicesjavahttps://ayushwing.com/blog/retries-without-a-retry-storm/https://ayushwing.com/blog/retries-without-a-retry-storm/Retries turn short failures into successes — and, done carelessly, turn a one-minute blip into a long outage. The four tools that keep retries helpful, with Resilience4j code.Tue, 27 Oct 2026 03:07:00 GMTdistributedsystemsresiliencejavamicroserviceshttps://ayushwing.com/blog/idempotency-keys/https://ayushwing.com/blog/idempotency-keys/A request that times out may still have succeeded. If the client retries a refund, you pay twice. How idempotency keys work, the edge cases that bite, and a Spring + Postgres implementation.Tue, 27 Oct 2026 03:06:00 GMTdistributedsystemspaymentsjavaapihttps://ayushwing.com/blog/three-small-tools/https://ayushwing.com/blog/three-small-tools/A vaccine-slot checker from 2021, a WebSocket chat on a free tier that no longer exists, and a Docker setup that streams five videos to YouTube at once. Small projects, each with one lesson that applies to big systems.Tue, 27 Oct 2026 03:05:00 GMTjavasideprojectswebsocketsdockerhttps://ayushwing.com/blog/yt-studio-ai/https://ayushwing.com/blog/yt-studio-ai/Score a thumbnail and title before you upload. How I combined deterministic Google Cloud APIs with Gemini and Claude in a Spring Boot + React app, why facts go in before opinions, and what I'd change.Tue, 27 Oct 2026 03:04:00 GMTaijavaspringbootllmhttps://ayushwing.com/blog/spring-boot-starter-observability/https://ayushwing.com/blog/spring-boot-starter-observability/Every service wires observability slightly differently, and the differences show up during incidents. How I packaged logging, tracing and metrics into one Spring Boot starter — and three gaps a code review of my own starter found.Tue, 27 Oct 2026 03:03:00 GMTspringbootobservabilityopentelemetryjavahttps://ayushwing.com/blog/graphql-federation-java/https://ayushwing.com/blog/graphql-federation-java/Three Spring Boot services, one graph, one query. How entity resolution, DataLoaders and resolver timing work in a federated Java setup — and the N+1 I left in on purpose to find.Tue, 27 Oct 2026 03:02:00 GMTgraphqljavamicroservicesperformancehttps://ayushwing.com/blog/java-mcp-server/https://ayushwing.com/blog/java-mcp-server/Exposing a Java method to an AI agent should take one annotation, not a protocol implementation. How I built java-mcp-server on Spring Boot 3, and what I'd change next.Tue, 27 Oct 2026 03:01:00 GMTjavaspringbootaimcp