Top System Design Interview Mistakes [Part 15] - Don't Ask For Too Much Permission

In this lessons, we address a common mistake, especially among junior engineers - Asking for too much permission. This often stems from a lack of confidence and a desire to avoid making decisions. Here are the core points:

- We often encounter candidates who, after discussing various options for solving a problem, defer decision-making to the interviewer

- Instead, we should make decisions ourselves. We can evaluate the options based on their trade-offs and choose the best one

- By taking ownership and driving the design, we demonstrate strong decision-making skills

- While it’s important to ask clarifying questions, we should avoid relying too heavily on the interviewer for directional guidance. Instead, we should proactively drive the conversation and make decisions that address the key issues.

If you need extra help with your system design interview, [Formation.dev](https://formation.dev/partners/taro) can provide you hands-on, personalized support. Join us here: <https://formation.dev/partners/taro>

Become An Open Source Master [Part 4] - Open Source Terminology: Projects, Repos, Issues, PRs

We'll focus on GitHub, a popular platform for open-source software, to understand key terms and concepts.

- Projects and repositories (repos) are the core units of open-source projects on GitHub.
- You can view source code, metadata, and community activity within a repository.
- Issues are used to report bugs or request features, while pull requests propose code contributions.
- Pull requests are reviewed and discussed by the community before being accepted into the project.

Connect with James: 

- GitHub: <https://github.com/jamesgpearce>
- Twitter (X): <https://twitter.com/jamespearce>

Figuring Out What Matters In A Codebase

In a large codebase, the code will follow the Pareto Principle (the 80/20 rule): 20% of the components account for 80% of the impact. So your goal as the engineer is to spend most of your time on the 20% of code that matters to the business and matters to your coworkers.

How do you figure out where that 20% comes from?

- Talk to people
- Use blames to find hotspots
- Look for patterns in code reviews
- Look at past alerts and what triggered them

The Journey to Staff Engineer In Big Tech - Q&A

This is the Q&A portion of the Staff Engineer Panel discussion. Watch the [main content here](https://www.jointaro.com/lesson/SaYyJGLYvrAy4XGrDhy7/the-journey-to-staff-engineer-in-big-tech-panel-discussion/).

The journey to Staff Engineer is unique for everybody. In this session, we talk about all the ways we got there! Senior Engineer is a terminal level at most tech companies. 

Staff Engineer is the next level up. This is referred to as Staff at Meta/Google, or Principal Engineer at Amazon/Microsoft. 

Questions answered in the video: 
- I'm making a career change into Software Engineering -- what advice would you have? I want to get into Augmented/Virtual Reality.
- I'm already a Staff Engineer, but I'm struggling with performance management. What advice would you have to exceed expectations?
- What resources would you recommend to improve at communication? What is an effective way to find a mentor?
- I'd like to first become a Tech Lead (TL) and then transition into a Staff Engineer role. What advice would you have for me?
- I'm a Data Engineer (DE) and big fan of Zach! How do I show the impact of my work to a manager who may be unfamiliar, especially since I don't do frontend?

See discussions about Staff Engineers on Taro: [https://www.jointaro.com/topic/staff-engineer/](https://www.jointaro.com/topic/staff-engineer/)

Publicly available promotion stories:
- [Ryan's Instagram video processing improvements](https://engineering.fb.com/2022/11/04/video-engineering/instagram-video-processing-encoding-reduction/)
- [Rahul's internal tool for debugging](https://www.jointaro.com/lesson/qvp2quodqAEWSkN7sayt/case-study-building-a-meta-internal-tool-to-empower-an-entire-org-staff-promotion-story/)

Panelists:
- [Zach Wilson](https://www.linkedin.com/in/eczachly/)
- [Rahul Pandey](https://www.linkedin.com/in/rpandey1234/)
- [Carly Taylor](https://www.linkedin.com/in/carly-taylor-data/)
- [Lee McKeeman](https://www.linkedin.com/in/lmckeeman/)
- [Ryan Peterman](https://www.linkedin.com/in/ryanlpeterman/)

DSA Crash Course [Part 20] - Sum Numbers Recursive Approach

In this lesson, Alvin explores the strategy to solving the following interview problem:

> Write a function *sum_numbers_recursive* that takes in an array of numbers and returns the sum of all the numbers in the array. All elements will be integers. Solve this recursively.

```
sum_numbers_recursive([5, 2, 9, 10]); # -> 26
```

```
sum_numbers_recursive([1, -1, 1, -1, 1, -1, 1]); # -> 1
```

```
sum_numbers_recursive([]); # -> 0
```

```
sum_numbers_recursive([1000, 0, 0, 0, 0, 0, 1]); # -> 1001
```

If you need additional support taking these DSA skills and actually applying them, take [**Alvin's**](https://www.linkedin.com/in/alvin-zablan-b73a92117/) *complete* data structures and algorithms course on [**Structy**](https://structy.net/?utm_source=taro). You can try out the concepts yourself in their interactive code editor and learn advanced DSA patterns like stack exhaustive recursion.

Use [**this link to get 20% off**](https://structy.net/purchase?promo_code=taro20) the entire Structy DSA learning experience.

Follow Alvin on LinkedIn: <https://www.linkedin.com/in/alvin-zablan-b73a92117/>

Effective Communication Guide [Part 7] - Finale + How You Can Learn More

- Zooming out, good communication is about *building positive energy*. Sharing feedback to help someone improve, empathizing with people's struggles, giving heartfelt thanks - These all generate positive energy.
- If you're feeling angry or frustrated, take some time to calm down and collect your thoughts, especially if you want to share that in a more public setting. After you've done this, then you can share your problems in a constructive way.
- This series just barely scratches the surface when it comes to communication. If you have any follow-up questions or thoughts, please start a discussion in the Taro forum: <https://www.jointaro.com/questions/create/>

Making Every Single Meeting You Have Effective

What do you absolutely need to do with every single meeting in order to make it effective?

What is the most important question you should be asking yourself constantly during a meeting?

Setting clear goals for every meeting ensures focus, alignment, and efficiency. Rather than drifting through discussions, this mindset helps make the most of everyone's time.

- **Define the meeting goal upfront**: Whether the goal is to build a relationship, align on a decision, or explore a specific topic, clarify it before stepping into the meeting.
- **Hold the goal in mind throughout**: Actively track whether the conversation is moving toward the intended objective—even as you engage in real-time dialogue.
- **Course-correct if needed**: If the meeting strays off-topic or stalls, use the goal as a guidepost to refocus the discussion or adjust expectations.
- **Reflect afterwards**: Evaluate whether the meeting achieved its intended outcome. If not, determine what adjustments can improve the effectiveness of future meetings.
- **Build the habit**: With consistent practice, goal-oriented thinking during meetings becomes second nature, enhancing both productivity and influence.

15 SWE Years In 1.5 Hours [Part 13] - The Secret To Growing Fast

Getting better isn't about which AI tool you use or what books you read or even which company you work for. How fast you improve comes down to one fundamental skill that most people struggle with. This lesson teaches you:

- Why feedback is the fuel for rapid engineer growth
- How many engineers respond incorrectly when it comes to getting feedback
- The right mentality to have when it comes to feedback overall
- Why an incorrect piece of feedback can actually be a good thing

Stop Bugs From Happening Again - The Importance Of Retrospectives

Bugs are often times like ants: They don't come alone and are often representative of many more of their own kind. After you fix any bug, retrospect on why it occurred to begin with and what the team could have done to prevent it. If the bug was very serious (e.g. a production outage), bring the team together with a formal post-mortem report and meeting.

This video is a clip from our debugging masterclass. You can watch it here: [[Masterclass] How To Become A Debugging Master And Fix Issues Faster](https://www.jointaro.com/lesson/ioR6WzamAIUTpySLAr7o/masterclass-how-to-become-a-debugging-master-and-fix-issues-faster/)

Related resources:
- ["What's the difference between a low performer software engineer and a high performer?"](https://www.jointaro.com/question/nMxx2EMVIlJbl1oK4SGu/whats-the-difference-between-a-low-performer-software-engineer-and-a-high-performer/)
- [[Case Study] Solving A Multi-Million $$ Instagram Bug](https://www.jointaro.com/lesson/WYk4J05iBqOuPtD0CYKX/case-study-solving-a-multi-million-dollardollar-instagram-bug/)
- ["How can I become more independent and better at unblocking myself with tricky technical issues?"](https://www.jointaro.com/question/QhqQQGrDgFjZbqohpKe0/how-can-i-become-more-independent-and-better-at-unblocking-myself-with-tricky-technical-issues/)
- ["How to turn a string of silly mistakes into a mature positive outcome?"](https://www.jointaro.com/question/JybGyc935lsYbM8dAo7Y/how-to-turn-a-string-of-silly-mistakes-into-a-mature-positive-outcome/)

15 SWE Years In 1.5 Hours [Part 3] - Writing Good Code

With the rise of helpful online resources like StackOverflow and especially genAI tools like ChatGPT, learning to write code is now easier to ever. Where engineers earn their stripes (and the right to be paid $100k+ per year) is with their *code quality*. This lesson teaches you:

- The only true way to learn how to write good code
- Why copy-pasting what FAANG engineers do isn't a shortcut to writing good code
- How to objectively measure the quality of your code

To dive deeper into code quality, take our course here: [Level Up Your Code Quality As A Software Engineer](https://www.jointaro.com/course/level-up-your-code-quality-as-a-software-engineer/)

Maximizing a Severance Package 7/9 - Common Asks and Gives

- Connect with [Ethan on LinkedIn](https://www.linkedin.com/in/ethanevansvp/)
- Taro members get a discount to join [**Ethan's Level Up community**](https://levelupwithethanevans.substack.com/taro25)

Level Up Your Code Quality As A Software Engineer [Part 19] - Code Review Feedback

If you want to grow lightning fast as a software engineer, you need code quality feedback. This is the primary goal the entire "Pull Requests" section of this course is building up towards. This lesson will teach you:

- The algorithm for leveling up incredibly quickly as an engineer, especially for junior and mid-level engineers
- How NOT to respond to code review feedback
- How to gracefully respond to code review feedback to maximize your learning and deepen relationships with your teammates by going through an in-depth example

If you want to dive even deeper into code review, check out our masterclass: [\[Masterclass\] How To Do Amazing Code Review](https://www.jointaro.com/lesson/rhRFh49oouaUDhWUvkQb/masterclass-how-to-do-amazing-code-review/)

Amazon VP Shares Why Reorgs Happen And Why The True Reason Is ALWAYS Hidden

[**Ethan Evans**](https://www.linkedin.com/in/ethanevansvp/) is a retired Amazon VP who has gone through dozens of re-orgs across his tech career.

Re-orgs (reorganizations of the team structure) happen because at least one leader views something as broken: someone is under-performing, the right teams aren't collaborating, or some other reason which you may not have visibility into as an engineer.

Once a re-org happens, an effective way to build trust is to schedule time with your new skip level manager and ask what the mission of the team is, and if your work is still aligned to that mission. Ask your manager to setup a meeting if you can't do it on your own.

Communication challenges: Public announcements about such org changes often use vague language and corporate jargon, making it difficult for individual contributors to understand the true reasons behind them. This lack of transparency can lead to further confusion and distrust.

Legal considerations: Legal constraints limit how much information leaders can publicly disclose about personnel changes. Fear of lawsuits can lead to sanitized messages that obfuscate the real reasons behind decisions.

**More to explore:**

- [\[Masterclass\] How To Work Better With Your Engineering Manager](https://www.jointaro.com/lesson/2PbJb2fuqF3iMHy57eEg/masterclass-how-to-work-better-with-your-engineering-manager/)
- [How To Effectively Leverage Skip Level 1:1s](https://www.jointaro.com/lesson/TToehFEc738PBhJcALwL/how-to-effectively-leverage-skip-level-11s/)
- [Ask Me Anything (AMA) with a Disney Eng Director - Greg Benson](https://www.jointaro.com/lesson/eHbg5nVkHn2LYJ55oOVf/ask-me-anything-ama-with-a-disney-eng-director-greg-benson/)

Onboarding Tips For Senior+ Engineers

As a Senior Engineer (or Staff or Principal) coming into a new company, there will be some expectation that you are bringing in domain knowledge. Your opinion can be valuable. A few ways to have immediate impact:

- Contrast how your current company operates compared to past companies
- Ask questions about why certain processes exist or don't exist

As you ramp up, remember to "**respect what came before.**" You don't want to disparage existing systems without realizing that it was best designed at the time of construction with the constraints and knowledge *at the time*.

As a senior engineer, you also need to lay the foundation for team and org-level impact. This means you invest extra time in building relationships and meeting other senior/staff/principal engineers.

Senior Engineer video from krazam: <https://www.youtube.com/watch?v=eSqexFg74F8>

The #1 Principle To Remember When Authoring A Code Review

In this video, we discuss the most important mindset shift for code authors: **writing code with empathy for reviewers**. Code review is a collaborative act, and how we prepare and present our diffs directly impacts team productivity, trust, and code quality.

### Key Takeaways:

- **We write diffs with empathy**: The most valuable thing we can do as authors is consider how to make the review experience smoother for others. Clear, concise diffs help teammates help us faster and more effectively.
- **We respect reviewers’ time**: Reviewers choose to help us—they’re not obligated. Reviewing interrupts their own deep work and requires mental context-switching, so we express appreciation by submitting clean, readable diffs.
- **We build trust and social capital through quality**: Writing thoughtful diffs with summaries and test plans helps us gain faster approvals and earns the trust of teammates and tech leads.
- **We know we’ll be reviewers too**: As we grow in our careers, we’ll spend more time reviewing others’ code. We want our teammates to be just as thoughtful when submitting their diffs to us.
- **We lead by example**: High-quality, empathetic diffs set the cultural tone for our team. We improve the entire engineering environment by holding ourselves to the same standards we hope to receive.

Maximize Your Productivity As A Software Engineer [Part 13] - Decomposition

When you get a huge project as a software engineer, it's easy to get overwhelmed and just sort of... do nothing (or close to it). This lesson teaches you:

- What a well-decomposed project looks like with a concrete example
- How decomposing projects hacks your brain to make it more motivated and productive

To dive deep into tactics on decomposing projects, check out our in-depth explainer: ["How do I make software less overwhelming?"](https://www.jointaro.com/question/YseMPDw538jhyS1MWlTs/how-do-i-make-software-less-overwhelming/)

Learn from the code quality course here: [\[Course\] Level Up Your Code Quality As A Software Engineer](https://www.jointaro.com/course/level-up-your-code-quality-as-a-software-engineer/)

How To Supercharge Your Resume As A Junior Engineer

What's the best way to juice up your resume after you have gotten the basics?

True or false: As long as you can code and have a polished resume, that is enough to comfortably find a job.

Why are side projects such an effective tactic?

True or false: You can get something extremely close to work experience without having a formal job, all from the comfort of your own home.

So many junior engineers struggle for a very simple reason: They haven't taken the time to build real software. In this video, we talk about how earlier-in-career software engineers in particular need to stop dancing around the core issue and just start writing the code.

Here are the core points:
- **Resume optimization only goes so far** - At the end of the day, it doesn't matter how well your resume is formatted. If the underlying material isn't good, you don't have a real portfolio. If you are looking for your first job, this means that you need to be creative with what you put in.
- **Use side projects to create your own experience** - You don't need a formal company and work experience to write practical code that matters: You can do it completely on your own as long as you have a decent computer and an internet connection. It is easier than ever before for anybody to deploy their own app or website, all for free.

Related resources:
- [[Masterclass] How To Write A Stellar Tech Resume That Gets You More Job Opportunities](https://www.jointaro.com/lesson/OnQV2V3J8DYVBBuGbZx6/masterclass-how-to-write-a-stellar-tech-resume-that-gets-you-more-job-opportunities/) - The full video this clip was taken from, which includes a link to Alex's resume
- ["What technologies or stacks should I create a project to add in my resume for entry level software jobs?"](https://www.jointaro.com/question/c0DiG5ureLbkZ1mKD9Rf/what-technologies-or-stacks-should-i-create-a-project-to-add-in-my-resume-for-entry-level-software-jobs/)
- [[Masterclass] How To Build And Grow Tech Products To 500k+ Users For Free](https://www.jointaro.com/lesson/OEuX0KMhcnNSTJ50Voee/masterclass-how-to-build-and-grow-tech-products-to-500k-users-for-free/)

Why YOU Suck At Coding Interviews - From a Senior Engineer at Uber

[Edbert Chan](https://www.linkedin.com/in/edbert-chan-18a96950/) is a senior Android engineer at Uber. He wrote the popular guide “Welcome To The Coding Interview - You Suck” freely [available here](https://docs.google.com/document/u/1/d/1eKirumpmwDWTtKCJKn2HuoQ2NavEfR41whmTyaQcio4/mobilebasic) (and [here are the slides](https://docs.google.com/presentation/d/1vce04LepxDbu7K1ZyhtjVaSXC6Z0YYS9cAjNNztbEr4/edit#slide=id.p) presented).

If you want advice from Edbert, check out his AMA here: ["I'm Edbert, Ex-Apple current Uber Infra Android Engineer. AMA!"](https://www.jointaro.com/question/ftzODE689WYHw0FHGcl1/im-edbert-ex-apple-current-uber-infra-android-engineer-ama/)

This is a presentation about the common mistakes he has observed, and what you should do instead. Edbert believes that software engineers focus too much on the code and information during interview prep, and not enough on the engineering part of software **engineering**. Engineering is more than just coding, and a good interview process will be able to judge that.

The extensive guide is filled with practical tips for job seekers to pass the modern interview process at tech companies. Edbert covers the 9 mistakes that hold people back from passing technical interviews:

- Mistake 1: Not Putting Enough Time
- Mistake 2: Interview Approach Is Inconsistent
- Mistake 3: Your Interview Practicing Is Inconsistent
- Mistake 4: Not Fixing Your Own Mistakes
- Mistake 5: Not seeing how one decision or mistake leads to another
- Mistake 6: Not Understanding Your Own Solution Before Coding
- Mistake 7: Magic Bullets
- Mistake 8: Not Being Fast Enough
- Mistake 9: Being Full of Shit

Additional resources:

- [Ace Your Tech Interview And Get A Job As A Software Engineer](https://www.jointaro.com/course/ace-your-tech-interview-and-get-a-job-as-a-software-engineer/)
- [\[Taro Top 10\] Effective Interview Prep](https://www.jointaro.com/playlist/HLBYxJI7D1j8STolrwum/)
- [\[Masterclass\] How To Ace Your Big Tech Interview - Data Structures And Algorithms](https://www.jointaro.com/lesson/V4sTACzfOh22nMVcUV3w/masterclass-how-to-ace-your-big-tech-interview-data-structures-and-algorithms/)
- [\[Masterclass\] How To Ace Your Big Tech Interview - System Design](https://www.jointaro.com/lesson/J3I9fTW9ulr6T9KjxpqY/masterclass-how-to-ace-your-big-tech-interview-system-design/)

[Become A Go-To Person 4/18] The Benefits Of Being The Go-To Person

A course by [Jordan Cutler](https://www.linkedin.com/in/jordancutler1/), Senior Software Engineer at Pinterest and Author of the [High Growth Engineer Newsletter](https://read.highgrowthengineer.com/)

Get a discount on Jordan's newsletter here: <https://read.highgrowthengineer.com/taro>

How To Be An Effective Tech Lead [Part 3] - What Makes A Good Tech Lead

Good tech leads provide immense value to their teams through a large collection of ways. This lesson teaches you:

- What it means from a technical skills perspective to be a good tech lead
- How good tech leads exercise effective leadership
- The mindset tech leads must champion

Tech Career Growth Videos

Our instructional videos provide software engineers with insights needed for career growth. Masterclasses go incredibly in-depth on a specific tech topic while case studies are real examples from established engineering leaders.