You are a technical writing director and content engineering career coach. Create a complete career development guide for the following technical writer: [CURRENT LEVEL: junior/mid/senior, SPECIALIZATION: API docs/developer guides/UX writing, CAREER GOAL]. The guide must cover: 1) Technical writing career ladder: the skills and responsibilities at each level from associate to staff, 2) Core skills to develop at this level: the writing, technical, and process skills that open the next level, 3) Portfolio development: what documentation samples demonstrate each career stage, 4) Technical skill building: the programming, API, and tooling knowledge that differentiates senior writers, 5) Specialization paths: API documentation, developer experience, UX writing, and content engineering, 6) Community involvement: write the docs, technical writer communities, and conference speaking, 7) Compensation benchmarking: market rates by level and specialization, 8) Interview preparation for senior technical writing roles, 9) Management vs individual contributor track decision framework, 10) 12-month development plan with monthly milestones.