Ovo radno mesto je slobodno.

Because ovo must agree with radno mesto, and radno mesto is neuter singular.

In Serbian, this changes by gender:

• ovaj = this (masculine)
• ova = this (feminine)
• ovo = this (neuter)

Since mesto is a neuter noun, the correct form is ovo.

For the same reason: it agrees with the noun radno mesto, which is neuter singular.

The adjective slobodan changes by gender:

• slobodan = masculine
• slobodna = feminine
• slobodno = neuter

So:

• Ovaj posao je slobodan would sound wrong, because posao is masculine and would need slobodan
• Ovo radno mesto je slobodno is correct, because radno mesto is neuter

Literally, radno mesto means work place or working place, but in many contexts it means job position, post, or vacancy.

So depending on context, Ovo radno mesto je slobodno could mean:

• This position is vacant
• This job opening is available
• This post is unfilled

It does not always mean a physical place like a desk or seat, even though mesto literally means place.

Because the two words are close, but not identical.

• posao = job, work, employment in a general sense
• radno mesto = job position, post, work spot, official opening

In hiring or administrative language, radno mesto is often more precise when talking about a specific available position.

So if you are talking about a vacancy, radno mesto is very natural.

Here, slobodno means something like:

• vacant
• available
• unoccupied
• free

But Serbian slobodan/slobodno is broader than English free. Depending on context, it can mean:

• free as in not occupied
• free as in available
• free as in not busy
• free as in not restricted

Also, slobodno can be an adverb in other sentences, meaning something like freely or go ahead:

• Slobodno uđi. = Feel free to come in.
• Slobodno pitaj. = Go ahead and ask.

So context matters a lot.

Je means is. It is the 3rd person singular present tense of biti (to be).

So the structure is:

• Ovo radno mesto = this job position
• je = is
• slobodno = vacant / available

In standard Serbian, you normally need je in this kind of sentence, just as you need is in English.

It is in the nominative singular, because it is the subject of the sentence.

More specifically:

• radno is the neuter singular nominative form of the adjective radan/radni in this fixed expression
• mesto is neuter singular nominative

So the whole subject is ovo radno mesto = this job position.

Yes, Serbian word order is fairly flexible, but the sentence you have is the most neutral and standard order:

• Ovo radno mesto je slobodno.

You may also hear or see other orders for emphasis, for example:

• Slobodno je ovo radno mesto. — marked, unusual without context
• Radno mesto je slobodno. — natural if this is not needed

So yes, word order can change, but the original version is the best basic pattern to learn.

Yes. In Serbian, many nouns ending in -o or -e are neuter.

Since mesto ends in -o, it is neuter:

• to mesto = that place
• ovo mesto = this place

That is why both the demonstrative and the adjective are also neuter:

• ovo
• slobodno

It is written as two words:

• radno = work-related / working
• mesto = place

Together they form a fixed expression meaning workplace, post, or job position, depending on context.

So you should write:

• radno mesto ✅

not as one combined word.

In Cyrillic, it is:

Ово радно место је слободно.

Serbian normally uses both scripts, so it is useful to recognize both:

• Latin: Ovo radno mesto je slobodno.
• Cyrillic: Ово радно место је слободно.

Yes, it could, depending on context.

Because radno mesto can also mean work station or work spot, the sentence might sometimes mean:

• This workstation is free
• This work spot is available

But in many real-life contexts, especially HR, employment, or official notices, it usually means a vacant position. Context tells you which meaning is intended.