How long does the Mylight150 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 Mylight150?

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 Mylight150?

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 Mylight150:Product Manager Software Engineer Sales Supply Chain

Growth · Supply Chain Interview Guide

How to Pass the Mylight150 Supply Chain Interview in 2026

The Mylight150 DNA (TL;DR)

Mylight150's interviewers prioritize candidates who articulate how their contributions directly enhance the 'Batterie Virtuelle' offering. They seek individuals who can clearly define trade-offs when optimizing energy storage solutions for clients like Guillaume Client, focusing on tangible impact.

The Mylight150 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 Mylight150 interview outcomes, avoid these common traps:

Assuming that reducing CO2 emissions will always significantly increase costs without exploring alternative modes or efficiency improvements.
Failing to explore alternative sourcing options or work collaboratively with the supplier on a remediation plan.
Failing to articulate the 'why' behind their initiative or the measurable impact of their actions.
Giving a generic answer about 'sustainability' without connecting it to Mylight150's specific products or market position.

Test Yourself: Real Mylight150 Questions

Three real prompts pulled from our database.

Type · scenario

Our current shipping routes for components from Asia to our manufacturing plant in North America are highly optimized for cost. However, we're facing increasing pressure to reduce our carbon footprint. How would you approach re-evaluating and potentially re-optimizing these routes to balance cost, transit time, and CO2 emissions?

Type · case-study

Our demand for grid-scale battery systems is highly seasonal and influenced by government incentives and weather patterns. How would you approach building a demand forecasting process that incorporates these external factors, and what metrics would you use to measure its accuracy and effectiveness?

Type · ownership

Tell me about a time you took initiative to improve a process, tool, or system that wasn't explicitly part of your job responsibilities. What motivated you, and what was the impact?

+ many more questions, signals, and worked examples

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Mylight150 Interview Question Bank

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

9 of 14 questions shown

Recruiter Screen

1
Type · motivation
Mylight150 is at the forefront of the energy transition, developing innovative solutions for grid stability and renewable energy integration. What specifically about our mission and the supply chain challenges within the energy sector excites you and aligns with your career aspirations?

Operations Case

2
Type · case-study
Imagine our battery storage systems are experiencing a 20% increase in demand due to a recent grid instability event in a major metropolitan area. Our current lead time for key components is 12 weeks, and our manufacturing capacity is at 90%. How would you approach diagnosing and resolving potential bottlenecks in our supply chain to meet this surge in demand, considering both short-term and long-term solutions?
3
Type · case-study
We are considering expanding our battery manufacturing facility to a new region to reduce shipping costs and lead times to the West Coast market. What key factors would you analyze to determine the optimal location for this new facility, and what are the primary supply chain risks associated with such an expansion?
+ 1 more questions in this round (sign up to unlock)

Forecasting & Planning

4
Type · case-study
Our demand for grid-scale battery systems is highly seasonal and influenced by government incentives and weather patterns. How would you approach building a demand forecasting process that incorporates these external factors, and what metrics would you use to measure its accuracy and effectiveness?
5
Type · scenario
We are seeing significant discrepancies between our forecasts and actual sales, leading to both stockouts of critical components and excess inventory of others. Describe your approach to improving our Sales and Operations Planning (S&OP) process to better align supply with demand.
+ 1 more questions in this round (sign up to unlock)

Optimization

6
Type · conceptual
Explain in simple terms the intuition behind linear programming. How might you use it to optimize our distribution network for battery shipments, considering factors like transportation costs, delivery times, and CO2 emissions?
7
Type · scenario
We need to decide whether to build a new regional distribution hub or expand our existing ones to serve a growing customer base. What analytical framework would you use to make this facility location decision, and what are the key trade-offs you'd consider?
+ 1 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · ownership
Tell me about a time you took initiative to improve a process, tool, or system that wasn't explicitly part of your job responsibilities. What motivated you, and what was the impact?
9
Type · behavioral
Tell me about a time you had to influence a cross-functional team (e.g., engineering, sales, finance) to adopt a supply chain strategy or change that they were initially resistant to. What was your approach, and what was the outcome?
+ 2 more questions in this round (sign up to unlock)