Quantexa

Sr. Data Engineer Interview Experience - Brussels, Belgium

July 19, 2025

Negative ExperienceNo Offer

Process

I applied online. The process took 1 week.

I applied online and was later contacted by Summaya, who was professional and well-prepared during our call. After the interview, I was invited to complete a take-home assessment in Spark/Scala. Since I was new to Scala, I planned to go through the assessment over the weekend. However, when I first looked at it, I saw that it consisted of four tests, each with an estimated duration of 360 minutes—about 12 hours in total. Unfortunately, given that forty people clicked apply in the LinkedIn job announcement, it seemed worthless. Imagine doing the same in case of a few job interviews, so I decided not to proceed.

Questions

Did you work with external customers? There was experience in Databricks, Spark, and Scala. Salary expectations were discussed, along with what environment you like.

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Interview Statistics

The following metrics were computed from 1 interview experience for the Quantexa Sr. Data Engineer role in Brussels, Brussels.

Success Rate

0%

Pass Rate

Quantexa's interview process for their Sr. Data Engineer roles in Brussels, Brussels is extremely selective, failing the vast majority of engineers.

Experience Rating

Positive0%

Neutral0%

Negative100%

Candidates reported having very negative feelings for Quantexa's Sr. Data Engineer interview process in Brussels, Brussels.

Quantexa Work Experiences

Decent company to work with Scala

Principal Software Engineer • Former Employee

London, England

Pros: Relatively relaxed environment, Scala, good salary.

Cons: Very cliquey, hard to break into the relevant group.

Decent company to work with Scala

Principal Software Engineer • Former Employee

London, England

Pros: Relatively relaxed environment, Scala, good salary.

Cons: Very cliquey, hard to break into the relevant group.

Interesting work, strict client demands and poor internal communication

Data Engineer • Current Employee

London, England

September 16, 2025

Pros: I joined Quantexa during the academy scheme. This was one of the first implementations of the scheme, so hiccups were to be expected. - The People are generally nice and helpful - There is a mentorship scheme, which is great - The office is nice and has free coffee - The CEO (Vish) is incredible: transparent, friendly, and of course extremely skillful. I believe in his plans for the company. - Great pension scheme and medical care (Originally, pre-existing medical conditions were not covered, but you can apply to have them covered). - WFH is allowed with no penalisation (project requirements affect this but you will not be asked in the office more than 3 times a week)

Cons: - Open plan office - on busy days, it's hard to get a seat. Can also be loud. - A lot of socials are drinks-based/ there is a drinking culture and if you're not extroverted you are often left out. General introvertedness/shyness is also penalised during performance reviews as it is often used to suggest lack of confidence. - Progression can be very hard and biased when you are low/mid level - senior people who have never met you have more say than your manager/client feedback! - Very poor communication from people team/PMO. You never know when your next project is or who it will be until the last second, even if it was 'confirmed' a couple of weeks beforehand. Emails end up ignored if you are junior and ask them any questions, and they only give info to your manager who then relays it to you. - For some this may be a pro, but for me it is a con: you may be shifting project/teams every 4 months which means you become a jack of all trades but a master of none. This is fine when you are junior, but in performance reviews they often require you to have experience with the full stack before promotion (despite current senior developers not having all of this experience either). - Opportunities to be part of a stable team are very rare.

Interesting work, strict client demands and poor internal communication

Data Engineer • Current Employee

London, England

September 16, 2025

Pros: I joined Quantexa during the academy scheme. This was one of the first implementations of the scheme, so hiccups were to be expected. - The People are generally nice and helpful - There is a mentorship scheme, which is great - The office is nice and has free coffee - The CEO (Vish) is incredible: transparent, friendly, and of course extremely skillful. I believe in his plans for the company. - Great pension scheme and medical care (Originally, pre-existing medical conditions were not covered, but you can apply to have them covered). - WFH is allowed with no penalisation (project requirements affect this but you will not be asked in the office more than 3 times a week)

Cons: - Open plan office - on busy days, it's hard to get a seat. Can also be loud. - A lot of socials are drinks-based/ there is a drinking culture and if you're not extroverted you are often left out. General introvertedness/shyness is also penalised during performance reviews as it is often used to suggest lack of confidence. - Progression can be very hard and biased when you are low/mid level - senior people who have never met you have more say than your manager/client feedback! - Very poor communication from people team/PMO. You never know when your next project is or who it will be until the last second, even if it was 'confirmed' a couple of weeks beforehand. Emails end up ignored if you are junior and ask them any questions, and they only give info to your manager who then relays it to you. - For some this may be a pro, but for me it is a con: you may be shifting project/teams every 4 months which means you become a jack of all trades but a master of none. This is fine when you are junior, but in performance reviews they often require you to have experience with the full stack before promotion (despite current senior developers not having all of this experience either). - Opportunities to be part of a stable team are very rare.

Good place to work but not without problems

Senior Data Engineer • Current Employee

London, England

January 18, 2025

Pros: - The people. You’ll make a lot of really great friends here - Tech is interesting, the work is very varied and you’ll get a chance to work in a lot of different areas - Pay is pretty good. Some nice other benefits like birthday day off and 2 half days per year - Progression is really quick for new grads

Cons: - The job in delivery is a bit of a lottery depending on project allocation - some projects can be very intense and stressful or you might get left on the bench without a project altogether for several months. This also directly impacts your progression and ability to get promoted - The delivery role also doesn’t actually involve much data engineering - The culture is becoming more and more corporate. The social side of the company has fallen away quite a lot over the last year or so. Company values feel pretty superficial too

Good place to work but not without problems

Senior Data Engineer • Current Employee

London, England

January 18, 2025

Pros: - The people. You’ll make a lot of really great friends here - Tech is interesting, the work is very varied and you’ll get a chance to work in a lot of different areas - Pay is pretty good. Some nice other benefits like birthday day off and 2 half days per year - Progression is really quick for new grads

Cons: - The job in delivery is a bit of a lottery depending on project allocation - some projects can be very intense and stressful or you might get left on the bench without a project altogether for several months. This also directly impacts your progression and ability to get promoted - The delivery role also doesn’t actually involve much data engineering - The culture is becoming more and more corporate. The social side of the company has fallen away quite a lot over the last year or so. Company values feel pretty superficial too

Decent company to work with Scala

Principal Software Engineer • Former Employee

London, England

Pros: Relatively relaxed environment, Scala, good salary.

Cons: Very cliquey, hard to break into the relevant group.

4.0
Decent company to work with Scala
Principal Software Engineer • Former Employee
London, England
June 27, 2025
Pros: Relatively relaxed environment, Scala, good salary.
Cons: Very cliquey, hard to break into the relevant group.

Interesting work, strict client demands and poor internal communication

Data Engineer • Current Employee

London, England

September 16, 2025

Pros: I joined Quantexa during the academy scheme. This was one of the first implementations of the scheme, so hiccups were to be expected. - The People are generally nice and helpful - There is a mentorship scheme, which is great - The office is nice and has free coffee - The CEO (Vish) is incredible: transparent, friendly, and of course extremely skillful. I believe in his plans for the company. - Great pension scheme and medical care (Originally, pre-existing medical conditions were not covered, but you can apply to have them covered). - WFH is allowed with no penalisation (project requirements affect this but you will not be asked in the office more than 3 times a week)

Cons: - Open plan office - on busy days, it's hard to get a seat. Can also be loud. - A lot of socials are drinks-based/ there is a drinking culture and if you're not extroverted you are often left out. General introvertedness/shyness is also penalised during performance reviews as it is often used to suggest lack of confidence. - Progression can be very hard and biased when you are low/mid level - senior people who have never met you have more say than your manager/client feedback! - Very poor communication from people team/PMO. You never know when your next project is or who it will be until the last second, even if it was 'confirmed' a couple of weeks beforehand. Emails end up ignored if you are junior and ask them any questions, and they only give info to your manager who then relays it to you. - For some this may be a pro, but for me it is a con: you may be shifting project/teams every 4 months which means you become a jack of all trades but a master of none. This is fine when you are junior, but in performance reviews they often require you to have experience with the full stack before promotion (despite current senior developers not having all of this experience either). - Opportunities to be part of a stable team are very rare.

3.0
Interesting work, strict client demands and poor internal communication
Data Engineer • Current Employee
London, England
September 16, 2025
Pros: I joined Quantexa during the academy scheme. This was one of the first implementations of the scheme, so hiccups were to be expected. - The People are generally nice and helpful - There is a mentorship scheme, which is great - The office is nice and has free coffee - The CEO (Vish) is incredible: transparent, friendly, and of course extremely skillful. I believe in his plans for the company. - Great pension scheme and medical care (Originally, pre-existing medical conditions were not covered, but you can apply to have them covered). - WFH is allowed with no penalisation (project requirements affect this but you will not be asked in the office more than 3 times a week)
Cons: - Open plan office - on busy days, it's hard to get a seat. Can also be loud. - A lot of socials are drinks-based/ there is a drinking culture and if you're not extroverted you are often left out. General introvertedness/shyness is also penalised during performance reviews as it is often used to suggest lack of confidence. - Progression can be very hard and biased when you are low/mid level - senior people who have never met you have more say than your manager/client feedback! - Very poor communication from people team/PMO. You never know when your next project is or who it will be until the last second, even if it was 'confirmed' a couple of weeks beforehand. Emails end up ignored if you are junior and ask them any questions, and they only give info to your manager who then relays it to you. - For some this may be a pro, but for me it is a con: you may be shifting project/teams every 4 months which means you become a jack of all trades but a master of none. This is fine when you are junior, but in performance reviews they often require you to have experience with the full stack before promotion (despite current senior developers not having all of this experience either). - Opportunities to be part of a stable team are very rare.

Good place to work but not without problems

Senior Data Engineer • Current Employee

London, England

January 18, 2025

Pros: - The people. You’ll make a lot of really great friends here - Tech is interesting, the work is very varied and you’ll get a chance to work in a lot of different areas - Pay is pretty good. Some nice other benefits like birthday day off and 2 half days per year - Progression is really quick for new grads

Cons: - The job in delivery is a bit of a lottery depending on project allocation - some projects can be very intense and stressful or you might get left on the bench without a project altogether for several months. This also directly impacts your progression and ability to get promoted - The delivery role also doesn’t actually involve much data engineering - The culture is becoming more and more corporate. The social side of the company has fallen away quite a lot over the last year or so. Company values feel pretty superficial too

3.0
Good place to work but not without problems
Senior Data Engineer • Current Employee
London, England
January 18, 2025
Pros: - The people. You’ll make a lot of really great friends here - Tech is interesting, the work is very varied and you’ll get a chance to work in a lot of different areas - Pay is pretty good. Some nice other benefits like birthday day off and 2 half days per year - Progression is really quick for new grads
Cons: - The job in delivery is a bit of a lottery depending on project allocation - some projects can be very intense and stressful or you might get left on the bench without a project altogether for several months. This also directly impacts your progression and ability to get promoted - The delivery role also doesn’t actually involve much data engineering - The culture is becoming more and more corporate. The social side of the company has fallen away quite a lot over the last year or so. Company values feel pretty superficial too

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