Na intervjuu ću se predstaviti poslodavcu.

Because na here means at / during an event, so it takes the locative case.

• base form: intervju = interview
• locative singular: intervjuu

So:

• na intervjuu = at the interview / during the interview

The double u is normal here: the noun already ends in -u, and then the locative ending is also -u.

Poslodavcu is in the dative singular.

The verb phrase predstaviti se nekome means to introduce oneself to someone, and that someone goes in the dative.

So:

• poslodavac = employer
• poslodavcu = to the employer

This is one of those verb patterns you simply learn together:

• predstaviti se prijatelju = introduce oneself to a friend
• predstaviti se profesoru = introduce oneself to the professor

Se is a reflexive particle/pronoun and is part of the verb expression predstaviti se, which means to introduce oneself.

So:

• predstaviti = to present / introduce
• predstaviti se = to introduce oneself

In English, we often say myself explicitly, but in Serbian the reflexive se does that job.

Compare:

• Predstaviću se. = I will introduce myself.
• Predstaviću Marka. = I will introduce Mark.
  (no se, because now you are introducing someone else)

This is the future tense.

It is built with:

• a form of hteti (ću, ćeš, će, ćemo, ćete, će)
• plus the infinitive or another future structure

Here:

• ću = I will
• predstaviti = introduce
• ću se predstaviti = I will introduce myself

So the sentence means:

• Na intervjuu ću se predstaviti poslodavcu. = At the interview, I will introduce myself to the employer.

Both patterns exist in Serbian.

You can say:

• Predstaviću se poslodavcu.
• Ja ću se predstaviti poslodavcu.

When the auxiliary ću comes after the infinitive, it often joins to it in writing:

• predstaviću

But when another word comes first, ću stays separate:

• Na intervjuu ću se predstaviti...

So your sentence is completely normal.

Yes, Serbian word order is fairly flexible.

Your sentence:

• Na intervjuu ću se predstaviti poslodavcu.

puts emphasis first on when/where the action happens: at the interview.

Other natural versions are:

• Predstaviću se poslodavcu na intervjuu.
• Poslodavcu ću se predstaviti na intervjuu.

The meaning stays basically the same, but the focus changes a little.

One important thing: ću and se are clitics, so they usually appear near the beginning of the clause, in a fixed position pattern.

This is about aspect, which is very important in Serbian.

• predstaviti = perfective
• predstavljati = imperfective

In this sentence, the speaker means a single complete action in the future: they will introduce themselves once, at the interview. That is why predstaviti is used.

So:

• Predstaviću se. = I will introduce myself.
  (one completed act)

By contrast, predstavljati would suggest an ongoing, repeated, or habitual action, depending on context.

Yes, Serbian also commonly forms future meaning with ću da + present tense, especially in speech.

So you may hear:

• Na intervjuu ću se predstaviti poslodavcu.
• Na intervjuu ću da se predstavim poslodavcu.

Both mean the same thing.

Very roughly:

• ću + infinitive is often felt as a bit more standard/written
• ću da + present is very common in everyday speech

Literally, na often corresponds to on / at, but you should not translate it word for word.

In Serbian, na intervjuu is simply the normal way to say:

• at the interview
• during the interview

Many Serbian prepositions do not match English prepositions exactly, so it is best to learn the whole phrase:

• na sastanku = at the meeting
• na času = in class / during class
• na intervjuu = at the interview

The ending helps you.

The noun is:

• poslodavac = employer

Its dative singular is:

• poslodavcu = to the employer

That -u ending is very common for masculine nouns in the dative singular.

For example:

• student → studentu
• profesor → profesoru
• poslodavac → poslodavcu

So when you see predstaviti se + dative, you can recognize that the person in dative is the one you are introducing yourself to.

You pronounce both vowels, though in natural speech they flow together smoothly.

A rough guide:

• in-ter-vyoo-oo

In practice, speakers do not make it sound awkward; it just comes naturally as the declined form of intervju.

The spelling looks strange to English speakers, but grammatically it is regular: stem intervju + ending -u = intervjuu.