Hun søger et mere fleksibelt job, fordi hun vil have en mere professionel hverdag.

Because Danish nouns have grammatical gender.

• job is a neuter noun, so it takes et
• hverdag is a common gender noun, so it takes en

That also affects the adjective form:

• et fleksibelt job → the adjective gets -t because job is neuter
• en professionel hverdag → no -t, because hverdag is common gender

So:

• et fleksibelt job
• en professionel hverdag

are both examples of normal adjective agreement in Danish.

It changes because it describes a singular neuter noun: et job.

In Danish, an adjective in the indefinite singular usually looks like this:

• common gender: en fleksibel hverdag
• neuter: et fleksibelt job

So the -t ending is the normal neuter singular ending.

Compare:

• en stor bil
• et stort hus

The same pattern is happening with fleksibel → fleksibelt.

Because hverdag is not a neuter noun. It is a common gender noun, and with en nouns in the indefinite singular, the adjective usually stays in its base form.

So:

• en professionel hverdag ✔
• et professionelt miljø ✔

If the noun were neuter, then you would use professionelt.

In Danish, many longer adjectives form the comparative with mere rather than with an -ere ending.

So:

• fleksibel → mere fleksibel
• professionel → mere professionel

This is similar to English, where we say:

• more flexible
• more professional

rather than flexibler or professionaler.

In this sentence, the adjective still has to agree with the noun:

• et mere fleksibelt job
• en mere professionel hverdag

So mere shows comparison, and the adjective ending still shows agreement.

søger means is looking for, is seeking, or sometimes is applying for, depending on context.

In this sentence, Hun søger et mere fleksibelt job most naturally means:

• She is looking for a more flexible job
• or She is seeking a more flexible job

Important nuance:

• søge et job can mean apply for a job
• søge et mere fleksibelt job often sounds like look for / seek a more flexible job

A related expression is lede efter, which also means look for. But søge is often a bit more formal or goal-focused.

vil have literally means wants to have.

So:

• hun vil have en mere professionel hverdag = she wants a more professional everyday work life

In natural English, you might translate it as:

• she wants a more professional daily routine
• she wants a more professional workday
• she wants a more professional everyday life

The exact English wording can vary, but grammatically vil have is simply:

• vil = wants / will
• have = have

Here it clearly means wants to have, not future will have.

hverdag literally means everyday life, daily life, or weekday life, depending on context.

In this sentence, en mere professionel hverdag does not mean just a more professional weekday. It means something more like:

• a more professional day-to-day work life
• a more professional daily routine
• a more professional everyday working environment

So hverdag often refers to the ordinary flow of daily life, not just one single day.

Because fordi introduces a subordinate clause: because she wants...

The structure is:

• Main clause: Hun søger et mere fleksibelt job
• Subordinate clause: fordi hun vil have en mere professionel hverdag

In Danish subordinate clauses, the subject usually comes before the verb unless something like ikke or another sentence adverb changes the order.

So this is normal:

• fordi hun vil have...

If you add ikke, you can see the subordinate-clause pattern more clearly:

• fordi hun ikke vil have et stressende job

Here ikke comes before the verb that follows it, which is a classic sign of subordinate-clause word order in Danish.

Because Danish normally repeats the subject in the second clause.

So:

• Hun søger et mere fleksibelt job, fordi hun vil have...

literally has:

• She is looking for a more flexible job, because she wants...

Just like in English, you normally do not omit she in the second clause.

The comma before fordi is normal and very common in Danish writing.

So:

• Hun søger et mere fleksibelt job, fordi hun vil have en mere professionel hverdag.

is perfectly correct.

You may also see variation depending on comma style rules being followed, but for a learner, using a comma before fordi is a safe and natural choice in a sentence like this.

Yes, often you could say:

• Hun leder efter et mere fleksibelt job

This also means She is looking for a more flexible job.

The difference is mainly one of tone and nuance:

• søger can sound a bit more formal, deliberate, or goal-oriented
• leder efter is very common in everyday speech for looking for

If the meaning is specifically applying for a job, then søger job is especially common.

Because both nouns are singular:

• et job
• en hverdag

If they were plural, the adjectives would usually take -e:

• mere fleksible job
• mere professionelle hverdage

But in the sentence you gave, both noun phrases are singular and indefinite, so the adjective forms are:

• mere fleksibelt with neuter singular
• mere professionel with common gender singular

Very literally, it is:

• She seeks a more flexible job, because she wants to have a more professional everyday life.

A more natural English translation would often be something like:

• She is looking for a more flexible job because she wants a more professional workday.

This is useful because it shows that the Danish structure is actually quite close to English:

• Hun = she
• søger = seeks / is looking for
• et mere fleksibelt job = a more flexible job
• fordi = because
• hun vil have = she wants to have / she wants
• en mere professionel hverdag = a more professional everyday life / workday