How long does the Mister Spex interview process take?

Most candidates spend between 4 and 8 weeks from recruiter screen to offer. The onsite loop itself runs in a single day or is split across two half-days, with debrief and offer typically within 5 business days after.

How should I prepare specifically for Mister Spex?

Focus on three things: (1) the company DNA shown above - what they actually grade for, (2) the rounds in your loop, especially the round most candidates underestimate, and (3) drilling on the question types in this guide using a structured framework like CIRCLES or STAR.

Does this apply to engineering or design roles at Mister Spex?

The DNA stays the same - what changes is the round mix. SWE candidates face coding screens instead of Product Sense; designers face portfolio reviews and design exercises. The "what they value" and behavioral signals carry across all functions.

Other roles at Mister Spex:Product Manager Software Engineer Marketing Sales Brand Manager Supply Chain

Growth · Supply Chain Interview Guide

How to Pass the Mister Spex Supply Chain Interview in 2026

The Mister Spex DNA (TL;DR)

The interview panel at Mister Spex frequently evaluates how candidates approach the synergy between online platforms and Mister Spex Stores. They look for practical examples of how you've navigated complex retail challenges, especially when discussing the impact of decisions on key business metrics like conversion rates per store.

The Mister Spex Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, operations background, supply chain interest.
2
Round 2
Operations Case
End-to-end supply chain optimization, bottleneck diagnosis, network design.
3
Round 3
Forecasting & Planning
Demand planning, S&OP, inventory optimization, working with statistical and ML forecasts.
4
Round 4
Optimization
Linear programming intuition, route optimization, facility location, trade-offs between cost/service/CO2.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

Based on our database of Mister Spex interview outcomes, avoid these common traps:

Listing generic bottlenecks without relating them to eyewear e-commerce (e.g., high SKU count, customisation lead times, returns processing).
Treating ML/statistical forecasts as infallible without validation or understanding their limitations.
Failing to mention the limitations or assumptions of LP.
Treating physical stores as entirely separate from the online supply chain.

Test Yourself: Real Mister Spex Questions

Three real prompts pulled from our database.

Type · ownership

Tell me about a time you took ownership of a project or initiative that was facing significant challenges or ambiguity. What was the situation, what did you do, and what was the outcome?

Type · facility-location

If Mister Spex were considering opening a new micro-fulfillment center to speed up deliveries in a specific region, what key data points and analytical approaches would you use to determine the optimal location?

Type · conflict resolution

Tell me about a time you had a significant disagreement with a colleague or manager regarding a marketing decision. How did you approach the situation, and what was the outcome?

+ many more questions, signals, and worked examples

Unlock the rubric

Mister Spex Interview Question Bank

A sample from our database, grouped by round. Sign up to see the full set.

9 of 20 questions shown

Recruiter Screen

1
Type · motivation
What specifically about Mister Spex's supply chain and our position as an online-first eyewear retailer excites you most?

Operations Case

2
Type · case-study
Imagine our main distribution center experiences a sudden, unexpected closure for 48 hours due to a technical failure. How would you approach managing inventory and fulfilling orders during this period, considering our online-first model and customer expectations?
3
Type · bottleneck-diagnosis
In an online retail environment like ours, what are the most common bottlenecks you'd expect to find in the supply chain, from supplier to customer, and how would you go about diagnosing and resolving them?
+ 1 more questions in this round (sign up to unlock)

Forecasting & Planning

4
Type · demand-planning
How would you approach forecasting demand for a new line of prescription sunglasses with unique lens options, considering we have limited historical data?
5
Type · sop
Describe your experience with Sales and Operations Planning (S&OP). How would you ensure alignment between commercial plans and supply chain capabilities for Mister Spex?
+ 2 more questions in this round (sign up to unlock)

Optimization

6
Type · optimization-intuition
Explain the core concepts behind linear programming to someone unfamiliar with it. How might these concepts be applied to optimize our logistics operations at Mister Spex?
7
Type · route-optimization
How would you approach optimizing delivery routes for our online orders, considering factors like delivery time windows, customer density, and vehicle capacity?
+ 2 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · learning
Technology evolves rapidly. Can you give an example of a new technology or tool you've learned recently and how you applied it, or how you plan to apply it, in a practical context?
9
Type · Resilience
Tell me about a time you faced a significant setback or failure in a sales target or a key deal. How did you react, what did you learn, and how did you bounce back?
+ 6 more questions in this round (sign up to unlock)