Next year I'll (I will) have been working in the company for 10 years.

I won't (will not) have been working in the company for 10 years.

Will you have been working in the company for 10 years?

The film will already have started by the time we get home.

The form of the future perfect is
will + have + past participle.

Will you have finished it by the time I come back?

See word order and the form of the question above.

I will have been working in the company for 5 years next month.

The form of the future perfect continuous is
will + have + been + past participle.

I will not (won't) have been working in the company for 5 years next month.

The form of the negative is
will not + have + been + past participle.

Will you have been working in the company for 5 years next month?

The form of the question is
will + subject + have + been + past participle.

I'll have worked in three different positions at the company by the end of the year.

We use the simple form when we talk about an amount or number.