Oduvijek želim ovaj posao.

Oduvijek means since forever, for as long as I can remember, or ever since the beginning. It connects the past with the present.

Uvijek just means always in a more general sense.

So:

• Oduvijek želim ovaj posao. = I have wanted this job for a very long time, and I still want it now.
• Uvijek želim ovaj posao. would sound odd in most contexts, because uvijek is usually about repeated or general situations, not a long continuous desire from the past.

Also, oduvijek is written as one word.

Because Croatian does not use tenses in exactly the same way English does.

In English, I've always wanted uses the present perfect. Croatian often uses the present tense for a desire or state that started in the past and is still true now, especially with a word like oduvijek.

So:

• Oduvijek želim ovaj posao. literally looks like I always want this job from long ago until now
• but natural English often translates it as I've always wanted this job

The important idea is: the wanting is still true now.

Yes, you could.

That version uses the perfect tense:

• Oduvijek sam želio ovaj posao. — male speaker
• Oduvijek sam željela ovaj posao. — female speaker

This can also translate as I've always wanted this job.

The difference is subtle:

• Oduvijek želim ovaj posao highlights the desire as something still active and current.
• Oduvijek sam želio/željela ovaj posao sounds a bit more reflective, like you are looking back on that long-term desire.

In real life, both are possible depending on style and context.

Because Croatian usually does not need subject pronouns when the verb already shows the person.

Želim means I want, so ja is already understood from the verb ending.

• želim = I want
• želiš = you want
• želi = he/she/it wants

You can add ja for emphasis:

• Ja oduvijek želim ovaj posao.

But that would sound marked or contrastive, as if you are stressing I rather than someone else.

It is the accusative, because željeti usually takes a direct object:

• želim što? — ovaj posao

So ovaj posao means this job as the thing being wanted.

For this noun, the accusative looks the same as the nominative because:

• posao is masculine inanimate
• masculine inanimate nouns often have the same form in nominative and accusative singular

So:

• nominative: ovaj posao
• accusative: ovaj posao

They look the same, but the function in the sentence is different.

Yes. Croatian word order is more flexible than English word order.

Oduvijek želim ovaj posao is a natural order if you want to stress oduvijek first.

Other possible orders are:

• Ovaj posao oduvijek želim. — stronger emphasis on this job
• Želim ovaj posao oduvijek. — possible, but less natural in everyday speech

In general, putting oduvijek near the beginning sounds the most natural.

Želim is the better choice here.

• želim = I want / I desire
• hoću = I want / I will / I am willing

Hoću is usually stronger, more forceful, and can sound more like insistence or determination.

So:

• Želim ovaj posao. = I want this job
• Hoću ovaj posao. = I want this job, and it may sound more blunt or demanding

In a sentence like this, especially if you are expressing a long-term wish, želim is more natural.

Not in this exact sentence.

Oduvijek želim ovaj posao is the same whether the speaker is male or female, because the present tense verb form želim does not show gender.

Gender appears in the past tense, for example:

• Oduvijek sam želio ovaj posao. — male
• Oduvijek sam željela ovaj posao. — female

So this sentence itself is gender-neutral.

Not always in exactly the same way.

It is most natural when ovaj posao means something like:

• this kind of work
• this profession
• this role I have long dreamed of

If you mean a very specific job opening that only recently appeared, oduvijek may sound a little exaggerated, because that exact job has not existed forever.

In that case, Croatian speakers might choose something like:

• Jako želim ovaj posao. — I really want this job.
• Oduvijek želim raditi ovaj posao. — I have always wanted to do this kind of job.
• Oduvijek sam želio/željela raditi ovaj posao. — I have always wanted to do this kind of job.

So the sentence is understandable, but the best version depends on whether you mean this profession or this particular vacancy.