Software Engineering

Interview
Preparation Guide

Congratulations on making it this far. Our team put this guide together so you know exactly what to expect and how to put your best foot forward.

What to Expect

In an initial screening, you'll meet with a hiring manager to determine mutual fit and discuss a few core engineering principles related to the role. If we decide to move forward, your availability will be requested to meet with additional members of our team across a focused interview loop.

The loop covers live coding with an emphasis on AI systems thinking, a systems design whiteboarding session, and a career deep dive. Each session is designed to understand how you approach real problems — not to trip you up.

Your Path Forward

Four focused conversations designed to understand your craft, your thinking, and your potential as a teammate.

1

Initial Screening

30 min

Get to know us while we get to know you. We'll talk shop, answer your questions, and explore your capabilities and interests to ensure the role is the right fit.

2

Coding: AI Systems Thinking

60 min

A collaborative coding session focused on how you design and reason about AI systems — component architecture, class design, interface contracts, and measuring quality. More detail below.

3

Systems Design

45 min

A whiteboarding session — no coding. We'll use a collaborative tool to discuss architecture, API design, and the tradeoffs behind your approach to building systems.

4

Career Deep Dive & Values

30 min

We'll cover how you budget your time, manage conflict, work with others, and navigate the balance between time, scope, and quality. Come prepared with real examples.

Offer

If our team is aligned that you'd be a great addition, an offer is extended. We move quickly.

Deep Dive

The Coding Interview: AI Systems Thinking

Our coding interview is different from traditional algorithmic challenges. Rather than data structure puzzles, we evaluate how you think about building real AI systems — your engineering judgment, not memorized patterns.

  • Code Structure — How you organize code for clarity, maintainability, and long-term health of a codebase
  • Component & Class Design — How you decompose problems into well-defined components with clear responsibilities
  • Inputs & Outputs — How you define clear interfaces, contracts, and data flow between system boundaries
  • Measuring Outcomes — How you determine success metrics and evaluate whether a system is performing as intended
  • Quality of a Good Function — What makes a function well-crafted: purposeful, testable, with a single responsibility and predictable behavior

Come prepared to think out loud about real design decisions and tradeoffs — we're looking for thoughtful craft, not speed.

Deep Dive

The Systems Design Interview

This is a separate, whiteboarding-only session (distinct from the coding interview above). We'll discuss general architecture, API design, data modeling, and the tradeoffs you consider when building scalable systems. No code required — just clear thinking on a canvas.

To prepare, we highly recommend the following resource which covers the fundamentals of systems design interviews comprehensively:

System Design Interview — An Insider's Guide

How to Prepare

01

Show Up Ready

Find a quiet environment with a strong internet connection. Keep your phone on do not disturb. A clear mind is your most valuable tool.

02

Know Your Career

Review past experiences — companies, colleagues, projects — in the context of both successes and failures. We'll discuss key moments and what you learned.

03

Be Concrete

Avoid hypotheticals. Use real-world experiences that quantify and qualify your answers. We care about what you've done and how you handled it.

04

Why Altium?

You have a lot of companies to choose from. Think about what you're looking for and why our team resonates with you.

Tips & Best Practices

1

Think Out Loud

Don't solve problems in your head. Walking us through your reasoning lets us help if you're headed off-track — and you might find it's easier than you think.

2

Plan First

Discuss your approach before diving in. This prevents assumptions and ensures alignment with what the interviewer is looking for.

3

Solve, Then Optimize

A working solution beats an incomplete optimal one. Get something functioning first, then iterate toward elegance.

4

Ask for Clarity

Getting stuck is perfectly fine. Step back, walk through what you have, and ask questions. Interviewers respect clarity-seeking.

5

Design for Testability

Consider how your code would be tested. Clear inputs, clear outputs, purposeful functions. Quality is part of the conversation.

6

Skip the Tricks

Write clear, maintainable code. Large codebases require comprehension — don't try to impress with cleverness.

7

Interview Us Too

This is a two-way street. Prepare different questions for each interviewer — variety shows genuine curiosity. You might consider writing them down ahead of time.

Further Reading

Engineering is a vast field — don't feel you need to know everything. These resources cover the fundamentals.

Our Values

1.

Trust

The central foundation of our culture. We perform best in a high trust, low blame environment — and that's exactly what we build.

2.

Autonomy & Agility

We hire incredibly talented people and give them autonomy in how teams organize and make decisions.

3.

Coordinate, Communicate, Collaborate with Clarity

Despite being a distributed team, we believe the largest challenges ahead involve working closely together.

4.

Team over Ego

We are not family, but we only win when the team wins.

5.

Innovation & Experimentation

Altium prides itself in being a leader in innovation — pushing the boundaries of what's possible for electronics design teams.

6.

Empathy

We are all humans just typing on computers. Let's be real with each other.

You've Got This

Engineering is a massive field with a universe of things you could know. Don't sweat it. Bring the best version of yourself forward, think clearly, communicate openly, and you'll be fine. We're rooting for you.