from typing import Dict
from typing import Optional


def parse_job_description(job_id: str, jobs: Dict) -> Optional[Dict]:
    """
    Extract a job description for ``job_id`` from ``jobs``
    :param job_id: an AWS Batch ``jobId``
    :param jobs: a response to AWS Batch job descriptions
    :return: a job description for ``job_id``
    """
    job_desc = None
    for job in jobs["jobs"]:
        if job["jobId"] == job_id:
            job_desc = job
    return job_desc