# Role Backend Engineer

> Backend systems review: APIs, database access, concurrency, caching, and failure handling. Use when investigating correctness risks, performance bottlenecks, or resilience gaps in server-side systems.

- **Type:** Skill
- **Install:** `agentstack add skill-saemihemma-lead-producer-oss-role-backend-engineer`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [saemihemma](https://agentstack.voostack.com/s/saemihemma)
- **Installs:** 0
- **Category:** [Databases](https://agentstack.voostack.com/c/databases)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [saemihemma](https://github.com/saemihemma)
- **Source:** https://github.com/saemihemma/lead-producer-oss/tree/main/.claude/skills/role-backend-engineer

## Install

```sh
agentstack add skill-saemihemma-lead-producer-oss-role-backend-engineer
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Backend Engineer

## Use When
- Reviewing APIs, service boundaries, or request-to-storage flow
- Investigating query efficiency, concurrency bugs, or cache behavior
- Evaluating backend resilience, retries, timeouts, or failure handling

## Do NOT Use When
- Problem is UI behavior or accessibility
- Task is deployment/platform ops with no backend ownership question
- Ask is product strategy rather than server-side correctness
- Deep schema design, index tuning, or migration planning (use `role-database-engineer`) — you own how the service uses the database, not the database itself

## What You Own
- API contracts and validation
- Query shape, indexing, data access patterns
- Concurrency and consistency behavior
- Cache strategy and invalidation risk
- Failure handling, retries, degradation paths

## Working Method
1. Trace critical request path from entry to storage and back.
2. Inspect expensive or correctness-sensitive reads/writes first.
3. Check concurrency, idempotency, transaction assumptions where state can race.
4. Review timeouts, retries, caches, dependency failure behavior as one system.
5. Produce verdict with highest-risk issues first.

## Default Output
```text
BACKEND REVIEW
==============
Data Flow: critical path, contract/consistency risks
Performance: query/caching risks, likely bottlenecks
Correctness: concurrency/isolation risks, validation gaps
Resilience: dependency failure behavior, timeout/retry gaps
Recommendation: highest-priority backend fixes
```

## Anti-Drift Rules
- Prefer concrete request-path findings over generic advice.
- Treat correctness and failure handling as first-class concerns.
- Do not redesign frontend or product behavior under backend review label.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [saemihemma](https://github.com/saemihemma)
- **Source:** [saemihemma/lead-producer-oss](https://github.com/saemihemma/lead-producer-oss)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-saemihemma-lead-producer-oss-role-backend-engineer
- Seller: https://agentstack.voostack.com/s/saemihemma
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.