“EN-03-Security-Engineering-Hardening”

Multi-Tenancy Architecture Selector

Selects and details an isolation model (shared DB / schema per tenant / DB per tenant) against real requirements, including noisy-neighbor and backup isolation.

Event-Driven / CQRS / Saga Designer

Designs reliable event flows (Kafka/RabbitMQ/EventBridge): contracts, ordering, duplicates, sagas, and read models — including when NOT to use events.

Caching Architecture Advisor

Designs layered caching with explicit invalidation and consistency contracts — the hardest part of real systems.

Rate Limiting, Quota & Throttling Designer

Designs limiters (per-user/IP/tenant/API key), algorithm choice, and 429 contracts — including distributed counters and fairness.

File Upload / Media Pipeline Architect

Designs reliable uploads for large files with virus scanning, image/video processing, and storage lifecycle.

Search & Recommendation System Designer

Designs search (ES/OpenSearch/vector/hybrid) with relevance tuning pipelines — includes ranking eval and zero-result handling.

RAG / LLM-Application Architect

Designs a production retrieval-augmented generation system: chunking, embedding, hybrid retrieval, reranking, evaluation, and guardrails. (LLM-native dev category.)

LLM Evaluation / Hallucination Mitigation Planner

Builds an eval harness for LLM features: golden sets, metrics, red-team cases, and CI regression gates for prompts/chains.

Observability/SLO Architect

Defines SLOs, error budgets, alerting, and dashboards for a service from user journeys — symptom-based alerting, not noise.

Cost Optimization / FinOps Engineer

Finds and prioritizes cloud/infra spend reductions with risk and engineering cost.

Migration to the Cloud / Between Clouds Planner

Sequences a migration with risk control: inventory, patterns, data movement, cutover rehearsals, and rollback.

Technical Debt Prioritization Facilitator

Converts vague "tech debt" complaints into a ranked, quantified backlog linked to business risk and remediation cost.

Technical Spec / Design Doc Reviewer

Reviews a design doc for gaps and risky assumptions before implementation — cheaper than discovering them mid-build.

Operability: metrics/alerts/SLO, feature flags, rollback plan, launch plan,

Simplicity: does the design introduce infrastructure before it is needed? Are

Cinematic Portrait (人物电影感人像)

高质感电影感人像，适合头像、海报、品牌视觉；含灯光、镜头、胶片质感。

Product Photography (电商产品图)

干净商业产品图，自带场景/光感，适合电商主图与广告物料。

Logo / Brand Mark (品牌标志)

生成标志概念图（AI 出概念方向，最终需矢量重绘；复杂文字无法保证正确拼写）。

Poster / Editorial Illustration (海报插画)

强叙事海报风插画，适合活动海报、杂志配图、封面。

Children's Book Illustration (绘本风)

温暖一致的童书插画，先生成风格锚定图再批量出图保持角色一致。