Type · Motivation
What specifically about Open Cosmos's mission in democratizing space and our approach to satellite data excites you as a software engineer?
How to Pass the Open Cosmos Software Engineer Interview in 2026
Growth · Software Engineer Interview Guide
Sign up to see ATSHeadquartered in United KingdomInterview language: English
The Open Cosmos DNA (TL;DR)
They seek individuals who can translate complex technical challenges into actionable plans for satellite missions. Expect to discuss trade-offs made during the design of their DragonFly satellite bus.
Interviews inPython
The Open Cosmos Interview Loop
Your onsite loop will typically consist of 4 rounds.
- 1
Round 1
Recruiter ScreenMotivation, role fit, logistics. - 2
Round 2
Coding ScreenLeetCode-medium algorithmic problems under time pressure. - 3
Round 3
System DesignDistributed systems, trade-offs at scale, architecture under constraints. - 4
Round 4
Onsite CodingLeetCode-hard problems, reasoning about defects, code clarity, edge cases. - 5
Round 5
Behavioral / LeadershipPast evidence of ownership, influence, resolving conflict.
The Danger Zone: Top Reasons Candidates Fail
Based on our database of Open Cosmos interview outcomes, avoid these common traps:
- Giving a generic answer about space exploration without mentioning Open Cosmos's specific business model or technology.
- Returning excessively large or poorly structured JSON responses.
- Not clearly articulating the options considered and the rationale behind the final choice.
- Recommending a relational database without acknowledging potential scaling issues for time-series and geospatial data.
Test Yourself: Real Open Cosmos Questions
Three real prompts pulled from our database.
Type · Data Processing
Implement a function that takes a list of satellite image timestamps and calculates the average time difference between consecutive images from the same satellite. Handle cases where a satellite has only one image or no images.
Type · Data Ingestion
Design a system to ingest, process, and store satellite telemetry data from hundreds of satellites in near real-time. Consider data volume, velocity, variety, and reliability.
+ many more questions, signals, and worked examples
Sign up to unlock the full Open Cosmos grading rubric
Open Cosmos Interview Question Bank
A sample from our database, grouped by round. Sign up to see the full set.
9 of 13 questions shown
1
Recruiter Screen
1- 1
Type · Motivation
What specifically about Open Cosmos's mission in democratizing space and our approach to satellite data excites you as a software engineer?
2
Coding Screen
3- 2
Type · Algorithm
Given a stream of satellite image metadata (e.g., timestamp, satellite ID, sensor type, geographic bounding box), write a function to efficiently find all images that overlap with a given query bounding box and fall within a specified time range. Assume the stream can be very large. - 3
Type · Data Processing
Implement a function that takes a list of satellite image timestamps and calculates the average time difference between consecutive images from the same satellite. Handle cases where a satellite has only one image or no images. - + 1 more questions in this round (sign up to unlock)
3
System Design
3- 4
Type · Data Ingestion
Design a system to ingest, process, and store satellite telemetry data from hundreds of satellites in near real-time. Consider data volume, velocity, variety, and reliability. - 5
Type · Image Processing Pipeline
Outline the architecture for a scalable system that takes raw satellite imagery, performs automated quality assessment, and generates different processed products (e.g., multispectral composites, change detection maps). - + 1 more questions in this round (sign up to unlock)
4
Onsite Coding
3- 6
Type · Algorithm
Given a list of satellite passes (start time, end time, satellite ID), find the maximum number of satellites that are simultaneously in orbit over a given geographical area. Assume all passes are within a 24-hour period. - 7
Type · Debugging
A user reports that our service, which provides processed satellite imagery, is sometimes returning images with incorrect geographic metadata (e.g., wrong bounding box or projection). The code involves reading metadata from various sources, applying transformations, and writing to a database. How would you approach debugging this issue? - + 1 more questions in this round (sign up to unlock)
5
Behavioral / Leadership
3- 8
Type · Collaboration
Tell me about a time you had to collaborate closely with a non-technical stakeholder (e.g., product manager, sales, customer support) to deliver a software feature. What were the challenges, and how did you ensure alignment? - 9
Type · Technical Decision Making
Describe a situation where you had to make a significant technical decision with incomplete information or under pressure. What was the decision, what was your thought process, and what was the outcome? - + 1 more questions in this round (sign up to unlock)
Unlock all 13 Open Cosmos questions, free
No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.
Interview tracks at Open Cosmos
How Open Cosmos's DNA translates across functions. Pick your role.
Compare Open Cosmos with similar employers
Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.
Alta Ares
Same tierAlta Ares and General Cherry initiatives demand rigorous validation of aerospace telemetry. Evaluators grade your abi...
See Alta Ares interview questions
Isar Aerospace
Same tierSpectrum launch vehicle development requires extreme reliability; interviewers look for physical hardware constraints...
See Isar Aerospace interview questions
NewOrbit
Same tierThe technical assessment at NewOrbit, particularly for roles impacting Very Low Earth Orbit missions, seeks individua...
See NewOrbit interview questions
Practice Open Cosmos interviews end-to-end
Open Cosmos Mock Interview
Run a live mock interview with our AI interviewer using Open Cosmos-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
Open
STAR Stories for Open Cosmos Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals Open Cosmos interviewers grade on. Reuse them across every behavioral round.
Open
Open Cosmos Interview Prep Hub
The frameworks behind every Open Cosmos round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.
Open
Interview Frameworks
CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make Open Cosmos interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.
Open
Sample answers
What a strong answer to these Open Cosmos interview questions shows.
What specifically about Open Cosmos's mission in democratizing space and our approach to satellite data excites you as a software engineer?
A strong answer shows: Genuine interest in the company's mission; Understanding of the company's business model; Alignment with company values.
Implement a function that takes a list of satellite image timestamps and calculates the average time difference between consecutive images from the same satellite. Handle cases where a satellite has only one image or no images.
A strong answer shows: Correct data grouping; Handling of edge cases; Sorting and iteration logic; Understanding of basic statistical calculations on time series.
Frequently asked questions
How long does the Open Cosmos 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 Open Cosmos?
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 Open Cosmos?
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.
Explore careers on Workfive →