Test an Express.js Error Handling Library & Provide an Honest Developer Review

I am looking for JavaScript/TypeScript developers with real experience building backend applications with Node.js and Express.js to independently test an open-source npm library: ds-express-errors Website & documentation: ds-express-errors.dev The library provides centralized error handling for Express.js applications, including automatic error mapping for technologies such as Prisma, Mongoose, Sequelize, Zod, Joi, express-validator and JWT, custom HTTP errors, logging, configurable error responses, graceful shutdown utilities, and more. Important: I am NOT looking for positive reviews This is a paid developer testing session, not a request for promotion or a positive rating. I want to understand how real Express.js developers experience the library. If you dislike something, say so. If an API feels badly designed, say so. If the documentation is confusing, explain why. If you find a bug, report it. If you would not use the library in a real project, I want to know that too. A negative review receives exactly the same payment as a positive review. Your compensation is based on completing the developer test and providing thoughtful feedback, not on your rating or opinion of the library. Who I am looking for You should: - Have real JavaScript and/or TypeScript development experience. - Have practical experience with Node.js. - Have practical experience building APIs with Express.js. - Have previously worked with at least one relevant technology, such as: - Prisma - Mongoose - Sequelize - Zod - Joi - express-validator - JWT - Be able to independently create and run a small Express.js project. - Be comfortable reading technical documentation. I am specifically looking for developers with practical backend development experience. I am not looking for AI/LLM developers, prompt engineers, no-code developers, or applicants without practical Node.js/Express.js experience. Using AI as an ordinary development tool is fine, but the testing must actually be performed by you and the final review must represent your own experience and opinion. The task Create a small Express.js project and integrate ds-express-errors into it. The application does not need to be large or production-ready. It exists only to give you enough real interaction with the library to evaluate its developer experience. Start from the official website/documentation: ds-express-errors.dev I intentionally will not provide step-by-step integration instructions. Finding, understanding and navigating the documentation is part of the test. I want to see whether a developer encountering the library can understand how to use it from the existing documentation. Use your real stack Test functionality that makes sense based on technologies you already know. For example: - If you normally work with Prisma + Zod, you can test Prisma + Zod. - If you normally use Mongoose, test it with Mongoose. - If your Express applications use express-validator, that can be your test environment. Do not choose a technology you have never used simply to test more features. You do not need to test every feature of ds-express-errors. A detailed test of functionality relevant to your actual experience is much more valuable than superficially testing every feature. What to evaluate While building the test application, pay attention to your natural experience with the library. This can include: - Installation - Initial setup - Getting started experience - Documentation navigation - Documentation clarity - Code examples - API design - TypeScript developer experience - Error presets / custom HTTP errors - Automatic error mapping - Configuration - Error response customization - Logging - Integration with your database/validation libraries - Error handling behavior - Graceful shutdown - Debugging experience - Unexpected behavior - Missing functionality - Edge cases - Anything else you naturally encounter You do not need to artificially test everything on this list. I am interested in what happens during realistic usage. Deliverables 1. Test project source code Submit the source code of the Express.js application you used to test the library. It should contain enough code for me to understand how you integrated and used ds-express-errors. Please remove all sensitive information before submission, including: - ".env" files - API keys - passwords - credentials - tokens - private/proprietary code - personal information Please include the relevant project files such as "package.json", source files, configuration, etc. The project should demonstrate that the library was actually used. 2. Written developer review After testing the library, write a review based on your actual experience. The review should be published in the dedicated Reviews / Developer Experience category in the ds-express-errors GitHub Discussions. "https://github.com/Dianka05/ds-express-errors/discussions/101" (https://github.com/Dianka05/ds-express-errors/discussions/101) Please also submit the text of your review and the GitHub Discussion URL through Upwork as part of the final deliverables. The review should be written naturally. You do not need to mechanically answer every question one by one. However, it should contain enough detail to explain your experience. Please include: Library version tested For example: "ds-express-errors v1.x.x" Your test stack For example: "Node.js + Express.js + TypeScript + Prisma + Zod" Overall rating Give the library an overall rating from: 1/10 — very poor to 10/10 — excellent Choose the score that genuinely represents your opinion. There is no preferred or expected score. Please briefly explain why you selected that rating. Developer experience level Please indicate whether you currently consider yourself a Junior, Mid-level, or Senior developer. This is collected only to provide context for the review and to help me analyze feedback across different experience levels. It does not affect payment or how your feedback is evaluated In your review, consider discussing: - What did you build to test the library? - Which features did you actually use? - How easy was the initial integration? - Could you understand how to use the library from the documentation alone? - Was it easy to find the documentation you needed? - Was anything unclear, incomplete, misleading or difficult to find? - Were the examples sufficient? - Which parts of the API felt intuitive? - Which parts felt unnecessarily complicated or confusing? - Did anything behave differently from what you expected? - Did you encounter any bugs? - Did you encounter edge cases that did not appear to be handled? - Was debugging straightforward? - Did the library remove boilerplate from your application? - Was there anything you expected an Express.js error-handling library to provide but could not find? - Is there functionality you think should be added? - Is there functionality you think should be changed or removed? - What did the library do particularly well? - What did it do poorly? - How would you improve the developer experience? - How would you improve the documentation? - Would you personally use ds-express-errors in one of your own projects? - Would you consider using it in a production application? - Why or why not? Specific feedback is much more useful than general statements. Instead of: «The documentation could be better.» please explain something like: «I was trying to configure X. I expected to find it under Y, but the information was actually under Z. The example also didn't explain...» The same applies to positive feedback. Instead of: «The Prisma integration is good.» explain what made it good. 3. Paid testing disclosure Because you are being compensated for the developer testing session, your GitHub review must clearly disclose this. Please include a short statement such as: «Disclosure: I received money compensation for independently testing ds-express-errors and providing my honest feedback. Payment was not dependent on whether my review was positive or negative.» The disclosure should remain visible with the review. Permission to use the review By completing this contract and submitting your review, you give the ds-express-errors project owner permission to quote, reproduce and display your submitted review, in whole or in part, for project-related purposes. This includes: - ds-express-errors.dev - Project documentation - GitHub repository - Project social media - Articles about the project - Other ds-express-errors promotional or informational materials This permission also includes displaying screenshots of the public GitHub Discussion containing your review. Your feedback will not be edited or quoted in a way that intentionally changes its meaning. If only part of the review is quoted, it may be shortened for presentation while preserving the original meaning. The material will remain identified as feedback originating from a compensated developer testing session. GitHub identity By completing the contract, you also permit the project to display the public GitHub username and public GitHub avatar associated with the review when showing or quoting your review. No additional private personal information will be published. GitHub Discussion availability The GitHub Discussion is intended to remain publicly available after completion of the contract. You may edit your review later to: - correct mistakes, - clarify your feedback, - add additional observations, - or provide updates after future versions of the library. For example, if an issue you identified is fixed in a future version, you are welcome to update the review to mention that. A copy of the original submitted feedback will also be retained as part of the Upwork contract deliverables. Payment $15 fixed price per completed developer test. The payment covers: 1. Actually testing ds-express-errors in a small Express.js application. 2. Providing the source code of the test application. 3. Writing a detailed and honest developer review. 4. Publishing the review in the project's GitHub Discussions. 5. Submitting the review text and GitHub Discussion URL through Upwork. Payment is not dependent on: - giving the library a high rating, - recommending the library, - writing a positive review, - avoiding criticism, - or agreeing with the project owner. A properly performed test resulting in a 2/10 review is just as valid as a 10/10 review. When applying Please answer the following questions: 1. Do you currently consider yourself a Junior, Mid-level, or Senior developer? (This will not affect candidate selection. I am collecting this information so I can compare feedback across different developer experience levels.) 2. How many years of professional or serious project experience do you have with JavaScript/TypeScript? 3. How much experience do you have with Node.js and Express.js? 4. Which of the following have you actually used in projects? - Prisma - Mongoose - Sequelize - Zod - Joi - express-validator - JWT 5. Which stack would you most likely use to test ds-express-errors? 6. What types of Express.js applications have you worked on? 7. Please provide your GitHub profile and/or another example of your development work, if available. Please do not send a generic AI-generated proposal. I am selecting participants primarily based on actual Node.js/Express.js development experience, not on how polished the application message is.  What I want from this project The purpose of this project is to learn: - What experienced developers understand immediately - What confuses them - Whether the documentation is sufficient - Whether the API feels natural - Which features provide real value - Which features are unnecessary - What is missing - What should be improved - What bugs or edge cases exist - Whether developers would actually choose to use the library I am looking for evidence and honest opinions, not praise.