: Job description for my employment reference I've canceled my job to move on. Now I was asked how I want my Job description for my employment reference. My first draft was one full page...

Q. Do I use active verbs or nouns in a job description?
The key is brevity. You want your reader to remember the relevant information, without having to process loads of unnecessarily long grammatical constructs. If you think of it, these descriptions are often arranged as lists, instead of writing a narrative across long paragraphs. The rationale is again brevity.
In German, nouns are surprisingly better suited for this task. In my opinion they are also better suited in English.
As an example:

I have followed the deployment of processes related to waste disposal

is probably better replaced by

Deployment of waste disposal processes

Q. How do I customize my job description?
The easy path is to use the specific terms that you know from being an experienced professional in the field. Use jargon if needed, and if professionally acceptable. For instance, considering the following example from finance:

C++ Equity quant dev

instead of

developer of object-oriented software for the quantitative monitoring of stock market data

or, worse

C++ software engineer

The harder path is to add specifics of your role to the specific description given above. In the case of the equity quant dev, it may be further customized by adding information about the specific role and problems that were tackled:

emerging markets equity quant dev

or

equity quant dev for ultra-high-frequency trading platforms

or

buy-side equity quant dev

or a combination thereof, to nail down the specifics of your role, skills and position.

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In what context did you work?

Those interfaces have probably been in the context of a certain topic. What kind of software did you analyze and optimize? Was it financial software? Something in the game industry? ERP?

You have said much about the technology that you have worked with so far, but you haven't said a single word about the context in which you have worked with these technologies. This is interesting information for people looking for someone to hire. And it might not be obvious, as you could for example have worked for a bank, but worked mostly with their legacy self-made ERP system or something along those lines.

Different industries have different criteria for what is important. If you have worked with financial software everyone will know that you know a lot about security for example. That could be an important point and will certainly make your job description stand out more. It will definitely give future potential employers a better understanding of your knowledge and make your last point far less generic.

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