$this->attribute->loadByCode(4, 'deal_options');

    // Load Configurable Product
    $product = $this->product->create();
    $product = $product->load($parentId);
    $product->setStockData(['use_config_manage_stock' => 1, 'is_in_stock' => 1]);

    $attributeValues = [];
    $options = $this->attribute->getOptions();
    array_shift($options); //remove the first option which is empty
    foreach($options as $option) {
        $attributeValues[] = [
            'label' => 'Option',
            'attribute_id' => $this->attribute->getId(),
            'value_index' => $option->getValue(),
        ];
    }

    $configurableAttributesData = [
        [
            'attribute_id' => $this->attribute->getId(),
            'code' => $this->attribute->getAttributeCode(),
            'label' => $this->attribute->getStoreLabel(),
            'position' => '1',
            'values' => $attributeValues,
        ],
    ];

    $configurableOptions = $this->optionsFactory->create($configurableAttributesData);

    $extensionConfigurableAttributes = $product->getExtensionAttributes();
    $extensionConfigurableAttributes->setConfigurableProductOptions($configurableOptions);
    $extensionConfigurableAttributes->setConfigurableProductLinks($simpleDeals['ids']);
    $product->setExtensionAttributes($extensionConfigurableAttributes);

    $this->productRepository->save($product);