Έχω καλή επαφή με τη νέα συνεργάτιδά μου, και αυτό βοηθάει πολύ στη δουλειά.

Not usually literal.
Έχω καλή επαφή με κάποιον/κάποια is a common way to say:

• I have a good connection with someone
• I get along well with someone
• I have good rapport with someone
• communication between us is good

So Έχω καλή επαφή με τη νέα συνεργάτιδά μου means more than just I am in contact with my new colleague. It suggests a positive working relationship.

Because καλή has to agree with επαφή.

• επαφή = a feminine noun
• singular
• here it is the direct object of έχω

So the adjective also appears in the feminine singular accusative form:

• καλός = masculine
• καλή = feminine
• καλό = neuter

That is why you get καλή επαφή.

Because με means with, and in Greek it is followed by the accusative.

So:

• με = with
• τη νέα συνεργάτιδά μου = my new female colleague

The structure is:

• Έχω καλή επαφή = I have good rapport
• με τη νέα συνεργάτιδά μου = with my new colleague

Συνεργάτιδα is the feminine form of συνεργάτης.

It can mean:

• colleague
• coworker
• associate
• collaborator

In this sentence, new colleague or new coworker is the most natural meaning.

Because the person is female, Greek uses the feminine noun συνεργάτιδα.

This happens because μου is an enclitic word. Enclitics are short unstressed words that can affect the accent of the word before them.

The basic noun is:

• συνεργάτιδα

But when you add μου:

• η συνεργάτιδά μου = my colleague

The extra written accent helps preserve the correct stress pattern.

You will see this with many words:

• ο δάσκαλός μου
• η αδερφή μου (no extra accent needed here)
• η συνεργάτιδά μου

So this is a normal spelling rule, not a different word.

Both exist, but τη νέα is very common here.

The full article is την, but in Modern Greek the final -ν is often dropped before certain consonants. Since νέα begins with ν, many speakers and writers use:

• τη νέα

You may also see:

• την νέα

Both can appear, but τη νέα sounds very natural in everyday Greek.

τη νέα μου συνεργάτιδα is absolutely correct and very natural.

So these are both fine:

• τη νέα συνεργάτιδά μου
• τη νέα μου συνεργάτιδα

They both mean my new colleague.

The version in your sentence places νέα before the noun phrase in a straightforward way.
τη νέα μου συνεργάτιδα may sound slightly more neutral or more common to some speakers, but the difference is small.

τη συνεργάτιδά μου τη νέα is not the natural choice here.

Αυτό refers to the whole previous idea, not to just one noun.

So it means:

• this
• that fact
• this situation

In other words:

The fact that I have a good rapport with my new colleague helps a lot at work.

Greek often uses αυτό in this way to refer back to an entire statement.

Yes. Both are correct:

• βοηθάει
• βοηθά

Both mean helps.

In everyday Greek, many verbs have these two forms in the present tense.
For this verb:

• βοηθάω / βοηθώ = I help
• βοηθάει / βοηθά = he/she/it helps

So you could also say:

• και αυτό βοηθά πολύ στη δουλειά

with the same meaning.

στη is a contraction of:

• σε + τη = στη

So:

• στη δουλειά = at work / in the job / on the job

Modern Greek no longer has a separate dative case, so ideas like at, to, or in often use σε + article.

Examples:

• στο σπίτι = at home / to the house
• στην τάξη = in the classroom
• στη δουλειά = at work

In this sentence, βοηθάει πολύ στη δουλειά means it helps a lot at work or it helps a lot in the work situation.

Not exactly, though they can overlap.

• δουλειά is very common in everyday speech and often means work, job, or the workplace/work situation
• εργασία is often more formal and can also mean assignment, piece of work, or employment/work in a more formal sense

In this sentence, στη δουλειά sounds very natural and conversational.

A rough pronunciation guide is:

EH-ho ka-LEE e-pa-FEE me ti NE-a si-ner-GHA-ti-THA moo, ke af-TO vo-ee-THA-ee po-LEE sti thoo-LYA

A few helpful notes:

• χ in έχω is like the ch in German Bach or Scottish loch
• γ in συνεργάτιδα is a soft voiced sound, not like English hard g
• θ is like English th in think
• δουλειά is pronounced roughly thoo-LYA

The written accents show you where the stress goes:

• Έχω
• καλή
• επαφή
• νέα
• συνεργάτιδά
• αυτό
• βοηθάει
• πολύ
• δουλειά

Because the sentence joins two full clauses:

• Έχω καλή επαφή με τη νέα συνεργάτιδά μου
• αυτό βοηθάει πολύ στη δουλειά

In English, a comma before and is often optional depending on style. Greek is similar: punctuation can be a bit flexible here, especially when the first clause is longer or the writer wants a slight pause.

So the comma is natural, but the sentence would still be understandable without it.