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Learning new Tools for Interviews?

Data Engineer at Financial Company profile pic
Data Engineer at Financial Company

I'm a Data Engineer. Within the data engineering realm, there are a lot of tools, just like in the software engineering realm. The modern data stack is pretty popular these days. It includes things like Spark for ETL at scale, Docker for virtualized environments, Airflow for orchestration, dbt (data build tool) for transformations in SQL, Fivetran for automated data connectors, Snowflake for data warehousing, and more.

I'm far from knowing all of these tools well, primarily because I use very few of them in my day job. The main reason I want to change jobs is because of this.

I'm worried I'm caught in a catch-22 situation where I don't know the tools so I can't get jobs that have them, which I guess is similar to the new-grad cold start problem.

My question is, how should I think about learning new tools for job interviews? My current instinct is to learn via failure. That is, I have almost all of the above tools on my resume. If someone asks me about them and I'm not able to give a good answer, I will learn that part about the tool so if I'm in the same situation I can answer properly.

Another approach I can think of is to do Udemy courses of them so I have a deeper understanding of how they work. I've learned to be wary of course not tied to projects, though, so I'm hesitant.

I guess I could do projects to learn more about them, but those take time and right now I'm focused on applying to jobs.

I imagine some answers might focus on what my current problem is: can I get interviews or am I failing interviews? I don't think my issue is with failing interviews right now, and certainly not because of specific knowledge people have called me out for for not knowing these tools. I think my issue is more with sourcing interviews currently.

If there's general advice regarding how to think about prepping for an interview when you only have some of the requirements on the Job Description, would love to hear that too.

Thanks!

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3 Comments
a month ago

Side project feedback - Uber/Lyft simulation

Senior Software Engineer at Series B fintech startup profile pic
Senior Software Engineer at Series B fintech startup

I'd like to ask for your feedback on my side project - a full-stack simulation of a ride-hailing app such as Uber or Lyft.

App: 
Blog: 

A bit of background first. I've been wanting to publish a personal full-stack project for a while. These were my main reasons:

  • I wanted a platform to explore concepts and tools I don't get to work with in my day job, helping me accelerate my learning.
  • I've wanted to break into big tech and thought this project could help me stand out among many applicants.
  • I enjoy writing and wanted to get better at it.

Why did I choose a simulation of the Uber/Lyft app? I always found something very attractive about these apps - they're visually appealing and dynamic, with colossal architectures behind them. I thought it would be very cool to re-implement some aspects of such an app. I have also been reading the Uber engineering blog and got a glimpse of the complexity these companies are dealing with.

My final goal with this app was to have an animated map with cars picking up customers, driving them across the map and dropping them off at their destinations. Customers would post ride requests and the system would match them with the nearest drivers. The simulation would run on the backend, and the frontend map would show the action in real-time.

I started working on the project last autumn. I've spent around 300 hours working on it and you can see the result in the links above.

My ask

I'd love to get your feedback to improve or extend this app and my blog, keeping in mind my objectives:

  • I plan to apply to big tech companies this summer, and I'd like this project to help me with my applications.
  • The project targets both recruiters and hiring managers. With recruiters, the goal is to pass the initial screening and get me to the interview stage (of course, I'll also be trying to secure referrals, but I might not always succeed). With hiring managers, this project might help me score extra points in my final evaluation.
  • I might be applying to companies such as Uber or Bolt, but this project is not supposed to impress just the ride-hailing companies.
  • I prefer not to put much more time into the project at the moment, as my focus right now has to be on the coding interview prep.

Possible additions or improvements include:

  • Splitting the system across multiple machines (perhaps 3), making it truly distributed.
  • Adding various components used in large-scale systems such as load-balancer, rate limiter, or message queues. Indeed, these components are not actually needed for the app to function. But by doing so, I could demonstrate my ability to work with them (albeit not necessarily demonstrating deep expertise).
  • Adding comprehensive documentation with system diagrams and explaining the choices I made.
  • More rigorous testing by adding integration tests (right now, I only have unit tests).

As for my previous background - I've been an engineer for ~4.5 years, most of my experience is from a small startup (series B). I consider myself a full-stack engineer but going forward, I aim to specialize more in the backend. Therefore, the project should strongly communicate my backend skills. For my next role, I also prefer backend positions to full-stack ones.

Recently I watched the great masterclass from Rahul and Alex on side projects. It made me realize that while my project might be interesting from a technical perspective, it has no users. In fact, this app doesn't allow any user interaction by nature. However, what I'm lacking in terms of users, I'm hoping to make up with the degree of technical complexity. Please also share your views on this aspect.

Many thanks if you've read this long post to the end. I'll be very grateful for any tips on how to make this project more appealing 🙏🏼

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Editor's Choice
4 Comments
5 months ago

What is a hiring manager's opinion on a candidate who takes some time after being laid off to work on side projects/freelance?

Entry-Level Software Engineer [SDE 1] at Amazon profile pic
Entry-Level Software Engineer [SDE 1] at Amazon

I am an SDE1 that was recently laid off from AWS (~2 YOE total). Lately, I have been reflecting on what I wanted to do/what really excites me. I really enjoy software development and while I do want to get another job one day, I wanted to use this opportunity to scratch my entrepreneurial itch and create apps/websites/side-projects for fun or for many small business owners I know that need someone to create software for their business. I'm not sure how long this "break" will be but I would say ~2 to 3 months time. Part of this is inspired by Alex Chiou's love for side projects.

I understand that finding a job will take some time as well, so the total gap on my resume that will be filled by this freelance work/applying might be ~6 months total. I understand that there are other posts on Taro that talk about the impact of a career break but this won't necessarily be a break per se. On my resume I will put this down as freelance work I completed for clients and will be prepared to show potential employers a portfolio of what I did.

I was wondering if this would negatively reflect on my application when applying for SDE jobs again/will make it harder for me to land a job. Alternatively, I could begin applying and interview prep now and only work on these projects on the side. Thanks.

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2 Comments
4 months ago

Side-project - Data Eng, Full-stack, or mobile?

Data Engineer at Financial Company profile pic
Data Engineer at Financial Company

I'm a Data Engineer looking to break into FAANG. As such, my time outside of work right now is spent applying to jobs, asking people for referrals, and networking. When I have interviews, my focus shifts to Leetcode.

I really want to build a side-project though both because it's fun and because it will help me perform better at future jobs.

My (common) issue is this: where do I start? Not in terms of the problem I am solving. I have a super-smart friend who's a lawyer and an MBA who's into fantasy sports and he has neither the time nor the ability to create an app. I feel like I could just generate a bunch of different ideas with him and pick the one most interesting to me.

I mean in terms of tech area. Alex and Rahul are both mobile developers and that naturally lends itself to great apps. I know Alex has mentioned that in a vacuum, it's better to focus on front-end for side-projects. I have no experience with front-end or mobile, some back-end dev experience and a fair bit of data.

I could build a data eng project. Start Data Engineering has some great projects on his blog () and there's definitely plenty of examples online (e.g. ).

My question is whether I should build a DE project. I'm not particularly wedded to DE because I feel like I want to do more SWE work and less business analyst work. Above all, I want to get into FAANG for the boost to my learning, career, and comp. DE is prob the easiest way of getting there but again, not wedded to it.

So I see my options as a) doing a DE project (maybe using the projects above to get my feet wet); b) doing a full-stack project (hard to do a back-end only project I think); c) mobile? (Alex and Rahul are tempting me).

Is there any advantage to mobile over a web-dev project?

If I do b or c, I'm concerned about falling into tutorial-hell or at least taking too long to learn before building. I'm tempted by a full-stack course like Zero To Mastery's full stack course, but it's 40 hrs, and I know it's prob not necessary.

Just want to add that I'm a newb for side-projects and I'm aware that I can and will experiment with multiple project types once I get started.

Sorry for the unstructured thoughts here. My brain works on NoSQL, not SQL ;)

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3 Comments
7 months ago

Resume feedback and questions for a pivot into junior back-end roles?

Data Engineer at Meta profile pic
Data Engineer at Meta

Hi everyone, I'm looking to optimize my resume () and would love some feedback on it. I also have two specific questions about it.

  1. Should I even include my personal projects in my resume? Neither have any active users, so all they do is show that I can build something, not necessarily something of value. I've seen advice online about not including personal projects unless they have some sort of tangible value and/or active user-base, but I wanted to hear this community's thoughts about this.
  2. Is my resume too short? Can a resume even be too short? This partially ties into my first question because without those two projects, the resume would only fill up half of the page. My resume used to have a lot more points describing what I did during my professional experience, but most of it was fluff, so I decided to cut them out. I feel like I am stuck between a rock and a hard place here because if I want to fill up my page with more information, it feels like I would need to add fluff-like material. However, I don't want the few seconds a recruiter will spend looking at my resume to be spent looking at the unimportant fluff material I used to fill up the page, so I added the projects as a way to hopefully avoid the whole issue. I'm wondering if this is even something I should worry about.

Of course, if there's another issue with my resume that I didn't mention in these two questions, please feel free to point it out, even if it's a nitpick. Also, if it helps, for context, I am currently looking to pivot from data engineering to backend development, so I am aiming for more junior level roles.

Thanks in advance!

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2 Comments
8 months ago

Resume review for landing L4 or L5 in Faang+

Anonymous User at Taro Community profile pic
Anonymous User at Taro Community

My resume is below and a review would be great!

Questions:

  1. I tried to be concise and to "show" not "tell". What major improvements can I still make? Lots of progress already from seeing Alex's resume and the masterclass on resumes , but would love more.
  2. Does L5 make sense given the resume, or since I have just over 3 years of experience would L4 be worth pursuing as well over my current position? Following up on questions about down leveling , and leaving a startup for big tech .

*Note because my most recent experience is Team Lead and where I don't directly ship, I did break the rules and use bold to highlight earlier impact. I also put skills at the bottom for visual balance.


Team Lead for Software Engineering, Company X ⁓ $450M startup ⁓ 1M monthly active users

April 2022-Present

  • Managed 8 direct reports, 2 promoted to Senior (one from the junior), 3 on-boarded
  • Proactively addressed underperformance among direct reports resulting in 2 engineers improving their skills to meet expectations
  • Empathized with individuals to build trust and understand root causes which included addressing a system problem rather than blaming an engineer for poor performance
  • Recognized hard work resulting in high team morale and often completing sprint goals

Android Engineer II, Company X ⁓ employee #18 of 150 ⁓ engineer #4 of 25

May 2021-Mar 2022

  • Rebuilt our $125M-revenue driver, a 2D list of games, to be faster, modular, simpler
  • Devised a strategy to improve UX through the creation of a bottom sheet and a resizing video solution, lead to a 4.3% increase in D7 profit
  • Created a service reminding users when their games are installed, even when outside app, and made a reusable, modular notification system, leading to a 75% decrease in abandonment
  • Debugged a $1M bug and presented a brownbag on it

Android Engineer I, Company X

Nov 2019-April 2021

  • Presented 20+ architecture and testing docs to my team before building complex features
  • Created robust test suites to ensure correct behavior and great UX through fault tolerance

Internships: Zillow, Undergrad Research

Skills: Kotlin, Java, Room/SQLite, SOLID, MVVM, Git, Design patterns, OOP, TDD

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9 months ago

Success story after PIP?

Entry-Level Software Engineer at Series E Startup profile pic
Entry-Level Software Engineer at Series E Startup

I transitioned into a backend engineering role 1 year ago after working as a data analyst for 3 years. The jump was definitely big to me, as I had to learn a lot of new concepts (OOP, clean code, architecture, devops etc). The transition was done through internal hiring where they did a live coding interview (2 easy leetcodes), a live system design interview, and motivational interview. I passed all of those and ended up in a high-paced team.

The team was severely understaffed. The manager was managing 3 teams that decreased from 20+ people to <10 people and there was hiring freeze. There was no proper onboarding and all the seniors were too busy with tasks to help me properly. I did my best to read the documentations and set up 1-1s with more senior engineers from other teams that could help me. I finished several projects although carried over some to the next half.

My 1st performance review was "meet expectations". However, before my 2nd performance review, there was a manager change and this manager gave me "partially meet expectations" and then said that I would be put on PIP program. When I asked the manager what the program would be like and how many people completed this successfully, he/she couldn't give a definitive answer and said that HR would be in touch me.

I decided to quit and spend time to learn more fundamental concepts and take up a freelance project. It's been 2 months since then. Right now I feel like I'm learning a lot in these 2 months compared to my 1 year in that company, but I can't help but feeling very anxious with all these layoffs and the incoming tech winter. I don't have any self-confidence within myself that I would get any decent job, especially after getting an incoming a PIP, I'm just worried that when I'm interviewing at my next job, the career gap in my resume and the past potential PIP would deter me from getting any jobs. I'm also at loss on how to avoid potential PIPs in the future. Any advice to help me? Thank you very much.

Edit: For more context, I didn't come from a CS background (I studied Mathematics). My team was not a revenue generator. The company was especially hit really hard during covid and had 2 big layoffs. When I left, there are many products that are being shut down and a couple of senior-level product managers left as well without being replaced due to hiring freeze. During the talk of my PIP, the manager brought up his/her expectations on me that was 1 level (mid-level) above my current level (junior-level).

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7 Comments
7 months ago