The Loopdown — Siddharth Pandalai Field notes from an engineer who writes — Android, Kotlin, and KMP, each lesson starring a personified bug. https://cv-siddharth.vercel.app/loopdown 2026-09-02T00:00:00Z Siddharth Pandalai The captain routes. The captain never rows. https://cv-siddharth.vercel.app/loopdown#the-captain-never-rows 2026-09-02T00:00:00Z 2026-09-02T00:00:00Z Field notes from “Notes From The Loop” on engineering-practice. Topics: ai-assisted-development, orchestration, cost-engineering, tooling. I audited my own migrations. It was not fine. https://cv-siddharth.vercel.app/loopdown#the-ferryman-rows-one-way 2026-08-31T00:00:00Z 2026-08-31T00:00:00Z Field notes from “Crossing The Schema” on data-integrity. Topics: android, room, migrations, testing, kotlin. Plausible is worse than wrong https://cv-siddharth.vercel.app/loopdown#the-borrowed-hand 2026-08-29T00:00:00Z 2026-08-29T00:00:00Z Field notes from “Notes From The Loop” on engineering-practice. Topics: ai-assisted-development, code-review, api-design, kotlin, android. Your thresholds do not belong in constants https://cv-siddharth.vercel.app/loopdown#thresholds-in-config 2026-08-27T00:00:00Z 2026-08-27T00:00:00Z Field notes from “Chain Of Custody” on data-integrity. Topics: architecture, configuration, kotlin, refactoring, tuning. Invariants are cheap. Silent corruption is not. https://cv-siddharth.vercel.app/loopdown#invariants-are-cheap 2026-08-25T00:00:00Z 2026-08-25T00:00:00Z Field notes from “Chain Of Custody” on data-integrity. Topics: data-integrity, validation, architecture, kotlin, testing. Every filter needs a documented exception https://cv-siddharth.vercel.app/loopdown#documented-exception 2026-08-20T00:00:00Z 2026-08-20T00:00:00Z Field notes from “Sensors Who Lie” on data-integrity. Topics: android, filtering, edge-cases, code-quality, location. Never silently change a number someone gets paid on https://cv-siddharth.vercel.app/loopdown#never-silently-change-a-number 2026-08-18T00:00:00Z 2026-08-18T00:00:00Z Field notes from “Chain Of Custody” on data-integrity. Topics: product-engineering, trust, ux, data-integrity, android. When two sensors disagree, rank them https://cv-siddharth.vercel.app/loopdown#accelerometer-outranks-gps 2026-08-13T00:00:00Z 2026-08-13T00:00:00Z Field notes from “Sensors Who Lie” on data-integrity. Topics: android, sensors, sensor-fusion, imu, location. Your data model is where uncertainty goes to die https://cv-siddharth.vercel.app/loopdown#uncertainty-dies-in-data-model 2026-08-11T00:00:00Z 2026-08-11T00:00:00Z Field notes from “Chain Of Custody” on data-integrity. Topics: data-modelling, architecture, provenance, sensors, api-design. One global threshold is how you delete valid data https://cv-siddharth.vercel.app/loopdown#one-global-threshold 2026-08-06T00:00:00Z 2026-08-06T00:00:00Z Field notes from “Sensors Who Lie” on data-integrity. Topics: android, location, thresholds, heuristics, sensor-fusion. Filtered should never mean deleted https://cv-siddharth.vercel.app/loopdown#filtered-never-deleted 2026-08-04T00:00:00Z 2026-08-04T00:00:00Z Field notes from “Sensors Who Lie” on data-integrity. Topics: android, data-modelling, filtering, observability, architecture. collectAsState is quietly leaking your work https://cv-siddharth.vercel.app/loopdown#collectasstate-leak 2026-07-31T00:00:00Z 2026-07-31T00:00:00Z Field notes from “Ghosts In The Recomposition” on compose-performance. Topics: android, jetpack-compose, flow, lifecycle, collectAsStateWithLifecycle. expect/actual is the wrong default in KMP https://cv-siddharth.vercel.app/loopdown#kmp-expect-actual-default 2026-07-29T00:00:00Z 2026-07-29T00:00:00Z Field notes from “One Brain Two Bodies” on kmp. Topics: kotlin, kmp, multiplatform, architecture, expect-actual, di. Your LazyColumn recomposes on every scroll https://cv-siddharth.vercel.app/loopdown#lazycolumn-recomposition 2026-07-24T00:00:00Z 2026-07-24T00:00:00Z Field notes from “Ghosts In The Recomposition” on compose-performance. Topics: android, jetpack-compose, recomposition, stability, performance. The 5-second window that crashes your service https://cv-siddharth.vercel.app/loopdown#foreground-service-five-seconds 2026-07-22T00:00:00Z 2026-07-22T00:00:00Z Field notes from “The Night Shift” on background-execution. Topics: android, foreground-service, workmanager, lifecycle, doze. CancellationException is not an assassin https://cv-siddharth.vercel.app/loopdown#coroutine-cancellation-messenger 2026-07-20T00:00:00Z 2026-07-20T00:00:00Z Field notes from “The Coroutine Court” on concurrency. Topics: kotlin, coroutines, cancellation, structured-concurrency, android. Teaching a phone to disbelieve its own GPS https://cv-siddharth.vercel.app/loopdown#mileway-dead-reckoning 2026-07-19T00:00:00Z 2026-07-19T00:00:00Z Field notes from “Sensors Who Lie” on location. Topics: android, location, sensor-fusion, dead-reckoning, kalman.