class Company(models.Model):
    name = models.CharField(max_length=200)

class Interview(models.Model):
    company = models.ForeignKey(Company, on_delete=models.CASCADE)
    position = models.CharField(max_length=200)

def detail(request, company_id):
    company = get_object_or_404(Company, pk=company_id)
    return render(request, 'core/detail.html', {'company': company, 'interviews': Interview.objects.filter(company_id=company_id)})

<h1>{{ company }}</h1>
<ul>
{% for interview in interviews %}
    <li>{{ interview.position }}</li>
{% endfor %}
</ul>

Interview.objects.filter(company_id=company_id)

company.interviews

class Company(models.Model):
    name = models.CharField(max_length=200)

class Interview(models.Model):
    company = models.ForeignKey(Company, related_name='interviews', on_delete=models.CASCADE)
    position = models.CharField(max_length=200)