A TypeScript/Node.js backend built as a 2025 UNSW College team coursework project. This page describes Jiawen Lin's contributions, not sole ownership of the team's application.
- Stack: TypeScript, JavaScript, Node.js, Express, Jest
- Focus: REST endpoints, session validation, resource ownership checks, HTTP tests and file persistence
- Scope: Educational backend project; no production deployment or benchmark claims
- Implemented four mission operations: create, list, view details and delete.
- Added session and ownership checks with appropriate HTTP error responses.
- Implemented launch-vehicle detail retrieval and associated launch-history information.
- Wrote Jest HTTP tests for successful requests, invalid resource IDs and missing or invalid sessions.
- Migrated authentication, mission and helper modules from JavaScript to TypeScript.
- Added JSON-file persistence and reorganised business logic and route modules.
The project gave me practice separating HTTP handling from application logic, maintaining types across shared data structures, and testing both successful and rejected requests. The persistence work used a JSON file, not a production database.
Some launch-vehicle test suites were skipped in the reviewed source. The existence of test cases does not establish a passing current test suite or a coverage percentage. This portfolio update does not certify that all tests pass.
2025年课程团队项目，使用 TypeScript、Node.js、Express 和 Jest 开发任务管理后端。个人贡献包括四类任务 REST 操作、会话与资源归属校验、载具详情及历史记录查询、HTTP 测试、JavaScript 至 TypeScript 迁移和 JSON 文件持久化。团队整体成果与个人工作分别说明，不将团队全部功能归为个人独立完成。
This README is a recruiting-oriented overview. The original coursework brief remains available in Git history. The repository contains team work; this overview does not relicense other contributors' work or grant permission to reuse coursework solutions.
See also: Sharpie portfolio.