Candidate requirements

Fewer requirements lead to higher application rates, so it helps to be concise. A candidate is 25% more likely to apply for a role with 1-3 requirements than a role with 7+ requirements
Put yourself in the shoes of the ideal candidate - is each bullet helping to attract them, or is it unnecessary noise that might be putting some good people off?
If you're open-minded about the requirements, be explicit about it. 'We're happy to accept applications from someone with 1-5 years of engineering experience' is much better than 'Demonstrable experience in software engineering'

Job responsibilities

Give a clear understanding of the day to day work and the core responsibilities
Candidates particularly like it when they're given a clear indication of how they will spend their time, e.g. 50% data analysis, 20% preparing presentations to stakeholders, 30% collaborating with product and operations team to determine and track KPIs