score:3
We do not know what will be the case in summer - the current regulations will be "reviewed", but it is unclear when they will be relaxed.
For the current regulation the federal police (Bundespolizei) has provided guidance. Valid reasons include:
So yes, you would potentially be allowed to enter. If you are not married to your partner, her picking you up will only help mildly, as they cannot easily check if you are family. You can, however, bring your work contract to prove that you have to start there on day X.
Note that this is by no means legal advice, and the situation will likely change until the summer. Make sure you check the regulations before you leave, and try to confirm the rules from an official source.
Upvote:1
Hard to give a definite answer as the situation changes, but perhaps it helps to give a general impression of the situation based in media reports and what I hear from my friends and family (who live in different parts of Germany).
Many (or all?) travel restrictions and curfews are imposed not by the federal state but the individual LΓ€nder, so you should not just consider the border crossing but the whole journey. It would help to know where you are planning to live. The specific rules are different by region, depending on the local situation. Generally EU citizens (and UK until the end of 2020) must be treated same as German citizens by EU regulations, so the internal travel restrictions apply to everybody, it's not a matter of nationality but if the purpose of the journey is acceptable.
There was a media report of a pensioner who moved from Ruhr to Friesland and was initially rejected, but she was allowed to register after she showed that she had actually emptied her old house for sale and was really planning to move permanently, not just escape the cities to the countryside (there's a big problem of people flooding the rural areas just now, so there are specific restrictions).
In your case, essential work-related travel is accepted, but it's hard to know what exactly counts as "essential". I would think that moving home to start a new job should (probably) be ok but you may have to convince not just immigration but possibly local authorities too or random police checks on the way. I don't think there's a specific document (like a visa or something), it's more a matter of explaining the situation convincingly to the officers, I would think a copy of the employment contract would be enough and perhaps a letter from the employer.