I ship products where infra OpEx and reliability are features. Swift low-level to edge serverless — strict validation, deterministic errors, zero main-thread blocking.
Architecture prioritized for accuracy, non-blocking execution, and scalable OpEx — verified through Instruments profiling and strict schema validation.
3 public live, 1 private. Each with real challenge → decision → outcome.
Real-time trending feed under high concurrency without database lock contention.
Exponential half-life decay T½=30m, TTL 90m computed in memory, partitioned dual-tier auth (Better Auth + isolated JWT admin) + Edge WAF allowlist.
Lock-free trending updates, instant feed evaluation, and predictable DynamoDB multi-table GSI scaling.
Intercepting global hotkeys instantly while preventing Spotlight AX paste operations from stealing window focus.
Carbon C-APIs for hotkey interception, Ifrit event-driven fuzzy aggregator, lazy AXUIElement with Toast queue fallback, [weak self] strict safety.
Instant hotkey response path on macOS, 0 main-thread blocks traced via Instruments, clean LSUIElement daemon background footprint.
Fine-grained CPU throttling without kernel instability, paired with zero-server cost offline licensing.
POSIX SIGSTOP/SIGCONT with proc_pidinfo identity, 3-state license machine, file security 0600, Workers + D1 edge backend.
Stable CPU limits across target ranges, zero-infra licensing cost, instant global edge distribution, offline license verification.
High-volume multi-platform post ingestion across social handles, handling dynamic rate-limits, anti-bot blocking, and cross-platform handle duplication.
Pydantic v2 strict validation, Taskiq + Redis distributed workers, SSE heartbeat 2s to avoid CF 524 on LLM streaming, aioboto3 async S3 + local auto-cleanup, smart handle deduplication.
Fast incremental daily crawl cycles, significant bandwidth savings via deduplication, zero disk bloat.
Separating prod from demo.
Partitioned auth tiers, WAF allowlist, Pydantic v2, SQLAlchemy 2.0, POSIX 0600. Fail closed.
Low-level C-APIs, SIGSTOP/CONT process control, SSE heartbeats, async S3 storage.
Serverless edge architectures, atomic GSI writes, LSUIElement daemon, offline-first design.
Chosen for latency, cost, DX.