Remélem, hogy az állásinterjú sikerül.

Because Hungarian uses two main verb conjugations: indefinite and definite.

• remélek = I hope in a more general sense, without a definite object
• remélem = I hope it / I hope that..., with a definite object

In this sentence, the whole hogy-clause acts like the thing being hoped for:

• Remélem, hogy az állásinterjú sikerül.
  = I hope that the job interview goes well.

So remélem is the natural form here. You can think of it as short for:

• Remélem azt, hogy...
  = I hope that...

The azt is usually left out, but the definite conjugation stays.

hogy means that.

It introduces a subordinate clause:

• Remélem = I hope
• hogy az állásinterjú sikerül = that the job interview goes well

So the structure is very similar to English I hope that...

In Hungarian, hogy is very common in sentences like this, although in everyday speech it can sometimes be omitted:

• Remélem, hogy az állásinterjú sikerül.
• Remélem, az állásinterjú sikerül.

Both are possible, but the version with hogy is very clear and standard.

Hungarian has two forms of the definite article:

• a before consonant sounds
• az before vowel sounds

Since állásinterjú begins with a vowel sound (á), you use az:

• az állásinterjú

Compare:

• a könyv = the book
• az asztal = the table

So this is just the normal article rule.

Because it is the subject of the verb sikerül.

In this sentence:

• az állásinterjú = the job interview
• sikerül = succeeds / goes well

So literally, the sentence is something like:

• I hope that the job interview succeeds.

Since állásinterjú is the subject, it stays in the basic dictionary form, with no extra case ending.

This is important because English speakers may expect something more like I hope the interview, where the interview feels like the object of hope. But in Hungarian, inside the subordinate clause, az állásinterjú is not the object of sikerül. It is the subject of that clause.

sikerül comes from the verb sikerülni, which often means:

• to succeed
• to work out
• to turn out well
• to go well

In this sentence, the most natural English translation is:

• I hope the job interview goes well.

A more literal translation would be:

• I hope that the job interview succeeds.

Hungarian often uses sikerül in situations where English would prefer go well or turn out well.

For example:

• Sikerült a vizsga. = The exam went well.
• Remélem, sikerül az út. = I hope the trip goes well.

So here sikerül does not mean the interview itself is successful in an abstract sense only; it naturally covers the idea of the interview going well for you.

Because Hungarian very often uses the present tense for future meaning when the context makes the time clear.

Here, I hope already tells you that this is about something not yet completed, so Hungarian does not need a separate future form.

So:

• Remélem, hogy az állásinterjú sikerül.

naturally means:

• I hope the job interview goes well.

If you really wanted to make the future more explicit, Hungarian can use fog + infinitive:

• Remélem, hogy az állásinterjú sikerülni fog.

But in many everyday contexts, that sounds heavier or less natural than the simple present. The original sentence is perfectly normal.

Hungarian word order is flexible, but different orders can change emphasis or information structure.

The version you have:

• Remélem, hogy az állásinterjú sikerül.

is a neutral, clear sentence: as for the job interview, I hope it goes well.

You may also hear:

• Remélem, hogy sikerül az állásinterjú.

This is possible, but it sounds less neutral and may depend more on context. Hungarian word order often reflects topic and focus, not just grammar.

For a learner, the original order is a very good default.

Yes, állásinterjú is written as one word.

It is a compound noun:

• állás = job / position
• interjú = interview

So literally it is job-interview, meaning job interview.

Hungarian forms a lot of compounds this way, and writing them as one word is very common.

Yes, very often.

You can say:

• Remélem, hogy az állásinterjú sikerül.
• Remélem, az állásinterjú sikerül.

Both mean the same thing.

The version with hogy is:

• slightly more explicit
• very standard
• often easier for learners to understand

The version without hogy is also common and natural in conversation.

A rough pronunciation guide is:

• Remélem ≈ reh-MAY-lem
• hogy ≈ hodj or hoj (depending on the speaker)
• az ≈ uz / az
• állásinterjú ≈ AA-laash-in-tehr-yoo
• sikerül ≈ shee-keh-RUEL

A few useful pronunciation notes:

• Hungarian stress is usually on the first syllable of each word.
• s is pronounced like English sh
• sz is pronounced like English s
• gy is a soft sound somewhat like the d in British duke or during, though not exactly
• á is a long vowel, longer and more open than a
• ü has no exact English equivalent; it is similar to German ü or French u

So the sentence has roughly this rhythm:

• RE-mé-lem, hogy az ÁL-lás-in-ter-jú si-ke-rül.

Yes, it could be.

• Remélem, hogy az állásinterjú jól sikerül.

This means something like:

• I hope the job interview turns out well.

The original sentence without jól is already fine, because sikerül itself often carries the idea of success or going well. Adding jól makes that meaning even more explicit.

So:

• sikerül = already natural
• jól sikerül = also natural, with extra emphasis on well

Both are acceptable, but the original sentence is concise and idiomatic.