If my teammate keeps missing critical errors in their code, I would first ensure they feel supported rather than criticized. I’d suggest doing code reviews together, where we walk through the logic and catch mistakes early. Pair programming can also be useful, as it allows for real-time feedback. Encouraging them to use debugging tools like linters and static analyzers can help automate error detection. If the issue persists, I’d recommend relevant learning resources or coding exercises to strengthen their understanding. The key is to create a collaborative environment where they feel comfortable improving without pressure.

I would rather say them to first draft their complete approach on paper keeping in mind all the edge cases and complete user flows end to end. Once that task is done, do the code and then match the code according to the designed flow. In this way, most of the common and critical issues would be eliminated. Even if issues are still present, check if the on paper design was correct or that had some flaws. If that design missed those edge cases, they can have a peer review of the design with their co-worker and get it sorted for better understanding. If the issues were left at code level, they should cross check the code with the design at the time of PR if everything is in place or not. Criticism is good in a constructive way not otherwise.

When teammates struggle with code errors, I focus on empowerment, not correction. I create a safe environment for vulnerability by asking thoughtful questions rather than highlighting mistakes. Through structured pair programming sessions, I demonstrate debugging techniques while letting them drive the solution. I provide specific resources targeting their knowledge gaps and establish clear coding standards as guardrails. The most powerful approach is celebrating their growth journey—praising progress over perfection and treating each error as a learning opportunity. My success isn’t measured by bugs fixed, but by developing engineers who eventually solve problems independently.

Talk to them sounds like an alignment issue? Are they working on a new tech stack for them? Is it an issue of selling the work?

Code Reviews – Regularly review their code and provide constructive feedback. Pair Programming – Work together on coding tasks to spot mistakes early. Unit Testing – Encourage writing and running automated tests for better error detection. Debugging Tools – Introduce tools like linters and debuggers to catch issues. Training & Resources – Share best practices, coding standards, and relevant tutorials. Encourage Attention to Detail – Advise breaking down tasks and double-checking logic.