
Designing an Offline-First Sync Engine for Mobile Apps
7 min read
A deep dive into building a reliable sync engine that keeps mobile apps functional without connectivity, covering conflict resolution, queue management, and real-world trade-offs.

7 min read
A deep dive into building a reliable sync engine that keeps mobile apps functional without connectivity, covering conflict resolution, queue management, and real-world trade-offs.
7 min read
A detailed look at how Compose recomposition works under the hood, what triggers it, how the slot table tracks state, and how to control it in production apps.
6 min read
A systems-level breakdown of designing an event tracking system for Android, covering batching, schema enforcement, local persistence, and delivery guarantees.
6 min read
Architecture and trade-offs for building a feature flag and remote configuration system that handles targeting, rollout, and consistency across mobile clients.
6 min read
Concrete latency, TTFB, and cache-hit measurements across SSR, SSG, and ISR rendering strategies in Next.js under realistic traffic.
6 min read
End-to-end design of a mobile analytics pipeline covering ingestion, processing, storage, and querying, with emphasis on reliability and latency trade-offs.
6 min read
A retrospective on architectural decisions that seemed right at the time but aged poorly, and what I would choose instead with the benefit of hindsight.
6 min read
Designing a page view counter that handles concurrent writes, avoids double-counting, and stays responsive under load using Postgres.
7 min read
How to design APIs that handle duplicate requests safely, covering idempotency keys, server-side deduplication, and failure scenarios specific to mobile networks.
9 min read
Practical catalog of non-obvious Compose patterns that trigger excessive recomposition, with fixes and measurement strategies for each.
6 min read
Strategies for large-scale refactors that keep production stable, covering parallel runs, feature flags, gradual migrations, and verification techniques.
7 min read
Strategies for detecting and resolving data conflicts in offline-first mobile systems, covering CRDTs, last-write-wins, operational transforms, and manual resolution.
6 min read
Measuring latency, bundle size, and relevance quality between client-side search with Fuse.js and server-side search with Postgres full-text and Meilisearch.
7 min read
A detailed look at retry strategies for mobile clients, covering exponential backoff, jitter, circuit breakers, and adaptive retry policies for unreliable networks.
8 min read
A deep examination of Android's Binder IPC mechanism, its thread pool model, and the performance consequences that surface at scale in large applications.
7 min read
Strategies for API versioning that keep old mobile app versions functional, covering URL versioning, header versioning, additive changes, and deprecation policies.
6 min read
A catalog of failure modes that experienced engineers anticipate and design around, from cascading failures to data corruption to clock skew.
7 min read
Architecture patterns for mobile apps that function reliably on slow, intermittent, and lossy networks, covering request prioritization, adaptive quality, and graceful degradation.
7 min read
How lifecycle mismanagement causes memory leaks, state loss, and crashes in large Android apps, with patterns for handling lifecycle correctly across complex component hierarchies.
8 min read
System design for a mobile experimentation platform covering assignment, exposure tracking, metric collection, statistical analysis, and guardrail metrics.
7 min read
Cold start latency measurements across AWS Lambda, Vercel Functions, Cloudflare Workers, and containerized deployments with concrete numbers.
6 min read
An argument for architectural simplicity as a scaling strategy, with examples of how complexity creates bottlenecks that simple designs avoid.
9 min read
A systems-level look at the Android main thread, its message queue, how work is scheduled and blocked, and strategies for keeping it responsive in large-scale apps.
8 min read
Strategies for structuring, optimizing, and debugging dependency injection graphs in large Android apps using Dagger/Hilt, covering scoping, build performance, and runtime cost.
7 min read
Rate limiting strategies for APIs consumed by mobile clients, covering token bucket algorithms, client identification, degradation modes, and mobile-specific considerations.
6 min read
Architecture decisions behind building a file-based CMS with MDX, Git-backed versioning, and incremental builds for a content-heavy site.
6 min read
Non-negotiable engineering principles I enforce regardless of deadline pressure, team size, or scope, and the reasoning behind each one.
7 min read
How to design analytics event schemas that remain valid through product pivots, feature changes, and evolving business requirements without breaking downstream consumers.
8 min read
Architecture for a lightweight metrics ingestion pipeline using a buffer, batch writes, and pre-aggregated rollups on Postgres.
6 min read
How to design APIs, configurations, and system interfaces that guide users toward correct usage and make dangerous operations difficult to perform accidentally.
8 min read
Comparing client-heavy and server-heavy mobile architectures across performance, maintainability, update velocity, and user experience trade-offs.
6 min read
Why silent failures are more dangerous than crashes, and how to design systems that surface problems immediately rather than hiding them behind fallback behavior.
8 min read
A comprehensive guide to working within Android's background execution restrictions across API levels, covering Doze, App Standby, foreground service requirements, and WorkManager strategies.
7 min read
Architecture for reliable background job execution on Android, covering WorkManager, job prioritization, constraint handling, and failure recovery.
7 min read
Comparing cache-aside, write-through, and read-through strategies with measured hit rates, latency, and consistency trade-offs under production traffic patterns.
7 min read
Concrete design decisions that make production systems debuggable, from structured logging and correlation IDs to deterministic behavior and state inspection.
7 min read
Measured payload sizes, request counts, latency, and battery impact of REST vs GraphQL APIs serving a mobile application with varying network conditions.
7 min read
Architecture for secure authentication flows in mobile apps, covering OAuth 2.0 with PKCE, token management, biometric auth, and session security.
7 min read
Identifying the point where abstractions stop helping and start hurting, with patterns for recognizing and resolving abstraction debt.
8 min read
Techniques for reducing SSR latency including streaming, selective hydration, component-level caching, and measured performance gains.
6 min read
Real scenarios where adding a cache increased complexity, introduced bugs, or degraded performance, and the decision framework I use to evaluate whether a cache is the right solution.
7 min read
How to design backend APIs that account for mobile-specific constraints: bandwidth, latency, battery, intermittent connectivity, and long-lived client versions.
7 min read
Implementing token bucket and sliding window rate limiting with Redis, including burst handling, multi-tier limits, and measured overhead.
7 min read
How to build systems that new team members can understand, modify, and operate safely without requiring extensive tribal knowledge transfer.
9 min read
A comparison of push and pull architectures for mobile data delivery, covering WebSockets, SSE, polling, push notifications, and hybrid approaches with their constraints.
7 min read
A framework for placing complexity in the right layer of a system, whether that is the client, the server, the database, or the infrastructure.
7 min read
How to evaluate architectural trade-offs not just for current requirements but for how they will hold up as the system, team, and business evolve.
7 min read
Measuring the impact of HTTP cache headers, service workers, and local storage caching on repeat visit performance and data freshness.
7 min read
A framework for navigating the tension between shipping fast and shipping safely, with specific examples of when to prioritize each and the mechanisms that let you do both.
7 min read
How to build observability into system architecture from the start, covering the three pillars, instrumentation patterns, and common pitfalls.
8 min read
Architecture for a session-based authentication service with JWT access tokens, refresh token rotation, and measured security trade-offs.
8 min read
Benchmarking the runtime overhead of ORMs, validation libraries, middleware chains, and framework abstractions with concrete performance numbers.
6 min read
A framework for deciding where to draw boundaries in software systems, covering service boundaries, module boundaries, and data boundaries, with the trade-offs of each approach.
7 min read
Why mature, well-understood technology is usually the right choice, how to evaluate when new technology is justified, and the hidden costs of novelty.
8 min read
Designing an inverted index from scratch with tokenization, ranking, and query parsing, then comparing it against Postgres full-text search.
7 min read
The specific qualities I prioritize when designing and building software systems, and why these priorities differ from what most engineering culture emphasizes.
7 min read
How to build systems that continue providing value when components fail, covering load shedding, fallback strategies, and partial availability patterns.
8 min read
Testing job queue architectures with BullMQ, Postgres-based queues, and SQS under increasing job volumes, with failure handling and scaling measurements.
7 min read
Why the human factors in system design, including cognitive load, operational ergonomics, and team structure, matter as much as the technical architecture.
7 min read
A framework for identifying, categorizing, and managing engineering risk across system design, team dynamics, and operational decisions.
6 min read
Concrete characteristics that distinguish good engineering from impressive engineering, based on observations across teams and systems over many years.
8 min read
A decision framework for choosing between incremental refactoring and a full rewrite, based on system state, team context, and business constraints.
7 min read
The specific questions and frameworks I use when reviewing technical proposals, design documents, and architecture decisions, based on patterns from hundreds of reviews.
7 min read
Why the ability to explain a system in simple terms is a design constraint, not a communication skill, and how to build systems that meet this standard.
7 min read
The specific qualities and patterns I look for when reviewing system designs, from data flow clarity to failure mode analysis, and the common mistakes that signal deeper problems.
8 min read
Universal engineering principles that hold true regardless of language, framework, domain, or scale, distilled from years of building production systems.
7 min read
A candid look at how my approach to system design has changed over the years, from over-engineering to pragmatism, and the experiences that drove each shift.
8 min read
How to build systems that accommodate future changes without building unnecessary abstraction layers, speculative features, or premature generalization.
7 min read
Lessons that I knew intellectually but had to learn through painful experience before they truly changed my behavior, covering testing, deployments, dependencies, and team dynamics.
8 min read
The design principles I follow to build systems that are not just functional but genuinely pleasant to maintain, debug, and evolve over time.
8 min read
Why the choice of tools matters less than the intent behind how you use them, and how to maintain architectural clarity regardless of the technology stack.