Sefism is free for learners. We are here to help you grow, one step at a time.Join for free
Sefism.
FintechProduct company

Nubank

Digital bank offering credit cards, accounts, loans and investments through a mobile app in Brazil, Mexico and Colombia.

Not knownProcess not written up yetFounded 2013
Headquarters

Sao Paulo, Brazil

Headcount

5,000 and up

5,000 or more people
Work model

Not known

Hiring

Not known

Not enough signal to say. Check the careers page directly.
Where to apply

No careers page on file yet. Try their LinkedIn or the job boards below.

Website

Ask for a referral to Nubank

A referral only means something if the person giving it can actually speak to your work. I will refer you where I know someone on the inside and your profile genuinely fits the role, and I will tell you plainly when I cannot. Either way you get an answer, and a straight one.

  • I read every request. A reply takes a few days, sometimes longer.
  • I will not refer someone for a role their profile does not fit. It wastes your time and costs me the contact.
  • Where I cannot refer you, I will say why, and point you at the way in that does work.
  • Nothing you send here is shared with anyone without you agreeing to it first.

If you found the opening, paste it. It tells me which team you mean.

A Drive, Dropbox or personal-site link is fine. Make sure it opens without a request for access, or I cannot read it.

At least a short paragraph. This is what I would be putting my name behind, so specifics beat adjectives.

Comma separated, up to six. Things you would be happy to be tested on.

How they hire

The hiring process for this company is not written up here yet. Rather than guess at it, the page says so until it has sourced detail to show.

If you have interviewed here, you know more about it than anyone who has written about it. Send me the rounds and this section becomes real.

Add to the Nubank page

This library is only as good as what people who have been through it are willing to share. Most of these companies have no hiring process documented anywhere, and one account of what the rounds actually were is worth more than anything I can research from the outside.

What are you adding?

This decides how the claim is labelled on the page. Only someone representing the company can produce an “official” label, and I check that separately.

Year and month.

Comma separated topics, not the questions themselves.

Round by round is ideal: what each one was, how long, remote or in person, and what it covered.

Credit

Anonymous is the default. If you keep it anonymous, nothing identifying you reaches the page: it is published as a candidate account and your name stays with me. Never send anything covered by an NDA, and never send a take-home or a question paper.

Worth reading before you apply

From the Sefism resource library, matched to the rounds above.

Course
Grokking SQL for Tech Interviews

A SQL course for interviews that reviews the basics, order of execution, functions, subqueries, joins, set operations, DDL and DML, then works through 69 interview problems graded easy to hard plus 14 unguided test problems, run against a live database in the browser. It suits backend, data and analytics candidates whose SQL stops at a simple inner join, or who need a fast refresher before a SQL round.

  • Job search
  • Databases
  • Backend
Design Gurus · Interview Prep · 2 weeks · Intermediate
SubscriptionDetails
Course
Grokking Database Fundamentals for Tech Interviews

A text-based course on how databases work underneath: storage and page layout, indexing, transactions and ACID, concurrency control, partitioning and sharding, replication and consistency, consensus and leader election, recovery, and the main NoSQL families. It ends with case studies designing the databases behind Quora, TikTok, Airbnb and Snapchat. It suits engineers who want their database choices in system design answers to be defensible rather than hand-waved.

  • System design
  • Databases
  • Backend
  • Job search
Design Gurus · System Design · 2 weeks · Beginner
SubscriptionDetails
Course
Grokking Multithreading and Concurrency for Coding Interviews

A course on concurrency for interviews: processes and threads, race conditions and critical sections, the five synchronisation constructs (mutexes, read/write locks, semaphores, condition variables, barriers), and 17 threading problems from parallel search to the Dining Philosophers and a multithreaded web crawler. Code is in Python, Java, C++ and C#. It suits backend and senior candidates who have avoided concurrency and expect it in their loop.

  • Job search
  • CS fundamentals
  • Backend
Design Gurus · Interview Prep · 2 to 3 weeks · Advanced
SubscriptionDetails
Course
Advanced System Design Interview, Volume II

The second volume of Grokking the System Design Interview, aimed at senior and staff (L5/L6) design rounds. It works through harder case studies such as a payment system, flash sale, notification service, unique ID generator, Gmail, Reddit, Google Calendar and a code judging system, then goes beneath them with patterns like quorum, write-ahead logs and vector clocks and deep dives into Dynamo, Cassandra, Kafka, Chubby, HDFS, GFS and BigTable.

  • System design
  • Backend
  • Job search
Design Gurus · System Design · About 36 hours · Advanced
SubscriptionDetails
Course
CS50's Introduction to Databases with SQL

Harvard's free CS50 course on databases, taught by Carter Zenke and David J. Malan. Seven lectures move from querying to relating, designing, writing, viewing, optimising and scaling databases, starting with SQLite and ending with PostgreSQL and MySQL, with problem sets and a final project. It suits beginners and working developers who can write basic SELECT queries but do not yet know how to design a schema or make queries fast.

  • Web
  • Databases
  • Backend
Harvard University · Web Development · Beginner
FreeDetails
Cheat sheet
Sefism Backend Development Cheat Sheet

A quick-revision companion to the Sefism backend roadmap: an essentials chapter for your stack, then terminal and Git, how HTTP works, relational databases and SQL, API design, authentication and API security, caching and queues, testing and CI/CD, and architecture and reliability. It comes in seven editions (Node.js, Python, Java, C#, Go, PHP and Rust), each concept with a short example and the mistake to avoid. Read a chapter before a project, an exam or a technical conversation.

  • Web
  • Backend
  • Databases
  • DevOps
Sefism · Web Development · Reference · Intermediate
FreeDetails
Browse the whole library

What it pays

Nothing collected for this company yet, and nothing worth guessing at. A made-up range is worse than no range because people negotiate against it.

Add to the Nubank page

This library is only as good as what people who have been through it are willing to share. Most of these companies have no hiring process documented anywhere, and one account of what the rounds actually were is worth more than anything I can research from the outside.

What are you adding?

This decides how the claim is labelled on the page. Only someone representing the company can produce an “official” label, and I check that separately.

Year and month.

Comma separated topics, not the questions themselves.

Round by round is ideal: what each one was, how long, remote or in person, and what it covered.

Credit

Anonymous is the default. If you keep it anonymous, nothing identifying you reaches the page: it is published as a candidate account and your name stays with me. Never send anything covered by an NDA, and never send a take-home or a question paper.

What they build on

ClojureDatomicKafka

Universities they recruit from

No sourced university links yet. A campus drive, a career fair appearance or an internship partnership is what puts a university here.

Add to the Nubank page

This library is only as good as what people who have been through it are willing to share. Most of these companies have no hiring process documented anywhere, and one account of what the rounds actually were is worth more than anything I can research from the outside.

What are you adding?

This decides how the claim is labelled on the page. Only someone representing the company can produce an “official” label, and I check that separately.

Year and month.

Comma separated topics, not the questions themselves.

Round by round is ideal: what each one was, how long, remote or in person, and what it covered.

Credit

Anonymous is the default. If you keep it anonymous, nothing identifying you reaches the page: it is published as a candidate account and your name stays with me. Never send anything covered by an NDA, and never send a take-home or a question paper.

Sources

Interviewed at Nubank? Nobody has written this one up.

There is no public account of how this company hires, so this page has a careers link and not much else. One description of the rounds you sat would make it genuinely useful to the next person.

Want me to refer you here?

Send me the role, your CV and a few honest paragraphs on why you fit it. Where I know someone inside and your profile matches, I will make the introduction. Where I cannot, I will tell you why and point you at the route that does work. You get an answer either way.

Ask for a referral to Nubank

A referral only means something if the person giving it can actually speak to your work. I will refer you where I know someone on the inside and your profile genuinely fits the role, and I will tell you plainly when I cannot. Either way you get an answer, and a straight one.

  • I read every request. A reply takes a few days, sometimes longer.
  • I will not refer someone for a role their profile does not fit. It wastes your time and costs me the contact.
  • Where I cannot refer you, I will say why, and point you at the way in that does work.
  • Nothing you send here is shared with anyone without you agreeing to it first.

If you found the opening, paste it. It tells me which team you mean.

A Drive, Dropbox or personal-site link is fine. Make sure it opens without a request for access, or I cannot read it.

At least a short paragraph. This is what I would be putting my name behind, so specifics beat adjectives.

Comma separated, up to six. Things you would be happy to be tested on.

Add to the Nubank page

This library is only as good as what people who have been through it are willing to share. Most of these companies have no hiring process documented anywhere, and one account of what the rounds actually were is worth more than anything I can research from the outside.

What are you adding?

This decides how the claim is labelled on the page. Only someone representing the company can produce an “official” label, and I check that separately.

Year and month.

Comma separated topics, not the questions themselves.

Round by round is ideal: what each one was, how long, remote or in person, and what it covered.

Credit

Anonymous is the default. If you keep it anonymous, nothing identifying you reaches the page: it is published as a candidate account and your name stays with me. Never send anything covered by an NDA, and never send a take-home or a question paper.

Work with me

Stuck on something specific?

Writing only gets you so far. If you want an answer to your situation rather than the general case, book a session and we will work through it together. Sessions are free for approved Sefism members, and a few slots open each week.

Book a free sessionSee all services

Follow along

New writing, resources and project ideas land here first.