If you are ever contacted by this company, stay away from them. These are the best advice I could give you, I wish I had never been hired by them. Worst mistake of my career. I do believe you always learn from mistakes, but this one was too big. I have worked in various environements and could always fit in and be adaptable. This is the first time I despise a company that much, knowing how they treat their employees and candidates.
First piece of advice : check the other comments on Glassdoor, knowing Business Managers are asked to say nice things. It is in their interest to artificially level up their global rate. Check the comments from recruiters : even they say recruitment is awfully handled.
Few points you will regroup from diverse comments:
* the working conditions are terrible
* the pay is way under how much the market offers. They will say their HR teams and Business Managers have an accurate vision of the market and ensure an alignment, but it's a lie. As a recruiter I know how much engineers are paid on the UK market, it's not it.
* the recruitment criteria are also based on :
=> age : I was told if the engineer is too old, (s)he will be settled down and will not want to relocate as demanded. Some even dare to get married and have kids! Recruiters cannot contact candidates with 10 years of experience. It's part of their "Alten scope".
=> nationality : the first question asked by the Business Manager when you organise an interview (and not just for visa questions)
From the first phone interview, recruiters will tell you Alten works with big clients and big sectors. Some of them are just names, they're just to lure you into an interview. I had to do it, so I know it's still in practice. When you ask concretely what your mission would be, they have strictly no idea.