diff --git a/ddl/schemas/portfolio/00-schema.sql b/ddl/schemas/portfolio/00-schema.sql
new file mode 100644
index 0000000..ef4cd07
--- /dev/null
+++ b/ddl/schemas/portfolio/00-schema.sql
@@ -0,0 +1,19 @@
+-- ============================================
+-- TEMPLATE-SAAS: Portfolio Schema
+-- Version: 1.0.0
+-- Module: SAAS-019
+-- ============================================
+
+-- Create schema
+CREATE SCHEMA IF NOT EXISTS portfolio;
+
+-- Grant permissions
+GRANT USAGE ON SCHEMA portfolio TO template_saas_app;
+GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA portfolio TO template_saas_app;
+GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA portfolio TO template_saas_app;
+
+-- Default privileges for future tables
+ALTER DEFAULT PRIVILEGES IN SCHEMA portfolio
+  GRANT ALL PRIVILEGES ON TABLES TO template_saas_app;
+ALTER DEFAULT PRIVILEGES IN SCHEMA portfolio
+  GRANT ALL PRIVILEGES ON SEQUENCES TO template_saas_app;
diff --git a/ddl/schemas/portfolio/01-enums.sql b/ddl/schemas/portfolio/01-enums.sql
new file mode 100644
index 0000000..347278c
--- /dev/null
+++ b/ddl/schemas/portfolio/01-enums.sql
@@ -0,0 +1,41 @@
+-- ============================================
+-- TEMPLATE-SAAS: Portfolio Enums
+-- Version: 1.0.0
+-- Module: SAAS-019
+-- ============================================
+
+-- Product type enum
+CREATE TYPE portfolio.product_type AS ENUM (
+  'physical',
+  'digital',
+  'service',
+  'subscription',
+  'bundle'
+);
+
+-- Product status enum
+CREATE TYPE portfolio.product_status AS ENUM (
+  'draft',
+  'active',
+  'inactive',
+  'discontinued',
+  'out_of_stock'
+);
+
+-- Price type enum
+CREATE TYPE portfolio.price_type AS ENUM (
+  'one_time',
+  'recurring',
+  'usage_based',
+  'tiered'
+);
+
+-- Variant attribute type enum
+CREATE TYPE portfolio.attribute_type AS ENUM (
+  'color',
+  'size',
+  'material',
+  'style',
+  'capacity',
+  'custom'
+);
diff --git a/ddl/schemas/portfolio/02-tables.sql b/ddl/schemas/portfolio/02-tables.sql
new file mode 100644
index 0000000..cec9666
--- /dev/null
+++ b/ddl/schemas/portfolio/02-tables.sql
@@ -0,0 +1,262 @@
+-- ============================================
+-- TEMPLATE-SAAS: Portfolio Tables
+-- Version: 1.0.0
+-- Module: SAAS-019
+-- ============================================
+
+-- ============================================
+-- Categories (hierarchical product categories)
+-- ============================================
+CREATE TABLE portfolio.categories (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL REFERENCES tenants.tenants(id) ON DELETE CASCADE,
+
+    -- Hierarchy
+    parent_id UUID REFERENCES portfolio.categories(id) ON DELETE SET NULL,
+
+    -- Category info
+    name VARCHAR(100) NOT NULL,
+    slug VARCHAR(120) NOT NULL,
+    description TEXT,
+
+    -- Display
+    position INT NOT NULL DEFAULT 0,
+    image_url VARCHAR(500),
+    color VARCHAR(7) DEFAULT '#3B82F6',
+    icon VARCHAR(50),
+
+    -- Status
+    is_active BOOLEAN DEFAULT TRUE,
+
+    -- SEO
+    meta_title VARCHAR(200),
+    meta_description TEXT,
+
+    -- Custom fields
+    custom_fields JSONB DEFAULT '{}'::jsonb,
+
+    -- Audit
+    created_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    created_by UUID REFERENCES users.users(id) ON DELETE SET NULL,
+    deleted_at TIMESTAMPTZ,
+
+    -- Constraints
+    CONSTRAINT unique_category_slug UNIQUE (tenant_id, slug),
+    CONSTRAINT unique_category_position UNIQUE (tenant_id, parent_id, position)
+);
+
+COMMENT ON TABLE portfolio.categories IS 'Hierarchical product categories per tenant';
+COMMENT ON COLUMN portfolio.categories.parent_id IS 'Parent category for hierarchical structure';
+
+-- ============================================
+-- Products (main product catalog)
+-- ============================================
+CREATE TABLE portfolio.products (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL REFERENCES tenants.tenants(id) ON DELETE CASCADE,
+
+    -- Category reference
+    category_id UUID REFERENCES portfolio.categories(id) ON DELETE SET NULL,
+
+    -- Basic info
+    name VARCHAR(255) NOT NULL,
+    slug VARCHAR(280) NOT NULL,
+    sku VARCHAR(100),
+    barcode VARCHAR(100),
+    description TEXT,
+    short_description VARCHAR(500),
+
+    -- Product type
+    product_type portfolio.product_type DEFAULT 'physical' NOT NULL,
+    status portfolio.product_status DEFAULT 'draft' NOT NULL,
+
+    -- Pricing (base price, can be overridden by variants/prices)
+    base_price DECIMAL(15, 2) DEFAULT 0,
+    cost_price DECIMAL(15, 2),
+    compare_at_price DECIMAL(15, 2),
+    currency VARCHAR(3) DEFAULT 'USD',
+
+    -- Inventory
+    track_inventory BOOLEAN DEFAULT TRUE,
+    stock_quantity INT DEFAULT 0,
+    low_stock_threshold INT DEFAULT 5,
+    allow_backorder BOOLEAN DEFAULT FALSE,
+
+    -- Physical properties
+    weight DECIMAL(10, 3),
+    weight_unit VARCHAR(10) DEFAULT 'kg',
+    length DECIMAL(10, 2),
+    width DECIMAL(10, 2),
+    height DECIMAL(10, 2),
+    dimension_unit VARCHAR(10) DEFAULT 'cm',
+
+    -- Media
+    images JSONB DEFAULT '[]'::jsonb,
+    featured_image_url VARCHAR(500),
+
+    -- SEO
+    meta_title VARCHAR(200),
+    meta_description TEXT,
+    tags JSONB DEFAULT '[]'::jsonb,
+
+    -- Visibility
+    is_visible BOOLEAN DEFAULT TRUE,
+    is_featured BOOLEAN DEFAULT FALSE,
+
+    -- Attributes for variants
+    has_variants BOOLEAN DEFAULT FALSE,
+    variant_attributes JSONB DEFAULT '[]'::jsonb,
+
+    -- Custom fields
+    custom_fields JSONB DEFAULT '{}'::jsonb,
+
+    -- Audit
+    created_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    created_by UUID REFERENCES users.users(id) ON DELETE SET NULL,
+    published_at TIMESTAMPTZ,
+    deleted_at TIMESTAMPTZ,
+
+    -- Constraints
+    CONSTRAINT unique_product_slug UNIQUE (tenant_id, slug),
+    CONSTRAINT unique_product_sku UNIQUE (tenant_id, sku),
+    CONSTRAINT check_prices CHECK (base_price >= 0 AND (cost_price IS NULL OR cost_price >= 0))
+);
+
+COMMENT ON TABLE portfolio.products IS 'Product catalog with multi-tenant support';
+COMMENT ON COLUMN portfolio.products.images IS 'JSON array of image URLs';
+COMMENT ON COLUMN portfolio.products.variant_attributes IS 'JSON array of attribute names used for variants';
+
+-- ============================================
+-- Variants (product variants: size, color, etc.)
+-- ============================================
+CREATE TABLE portfolio.variants (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL REFERENCES tenants.tenants(id) ON DELETE CASCADE,
+    product_id UUID NOT NULL REFERENCES portfolio.products(id) ON DELETE CASCADE,
+
+    -- Variant identification
+    sku VARCHAR(100),
+    barcode VARCHAR(100),
+    name VARCHAR(255),
+
+    -- Attributes (e.g., {"color": "red", "size": "L"})
+    attributes JSONB DEFAULT '{}'::jsonb NOT NULL,
+
+    -- Pricing
+    price DECIMAL(15, 2),
+    cost_price DECIMAL(15, 2),
+    compare_at_price DECIMAL(15, 2),
+
+    -- Inventory
+    stock_quantity INT DEFAULT 0,
+    low_stock_threshold INT,
+
+    -- Physical properties (can override product)
+    weight DECIMAL(10, 3),
+
+    -- Media
+    image_url VARCHAR(500),
+
+    -- Status
+    is_active BOOLEAN DEFAULT TRUE,
+    position INT DEFAULT 0,
+
+    -- Audit
+    created_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    deleted_at TIMESTAMPTZ,
+
+    -- Constraints
+    CONSTRAINT unique_variant_sku UNIQUE (tenant_id, sku),
+    CONSTRAINT check_variant_prices CHECK (price IS NULL OR price >= 0)
+);
+
+COMMENT ON TABLE portfolio.variants IS 'Product variants (size, color, etc.)';
+COMMENT ON COLUMN portfolio.variants.attributes IS 'JSON object with attribute key-value pairs';
+
+-- ============================================
+-- Prices (multi-currency pricing)
+-- ============================================
+CREATE TABLE portfolio.prices (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL REFERENCES tenants.tenants(id) ON DELETE CASCADE,
+
+    -- Reference (either product or variant)
+    product_id UUID REFERENCES portfolio.products(id) ON DELETE CASCADE,
+    variant_id UUID REFERENCES portfolio.variants(id) ON DELETE CASCADE,
+
+    -- Pricing
+    price_type portfolio.price_type DEFAULT 'one_time' NOT NULL,
+    currency VARCHAR(3) NOT NULL DEFAULT 'USD',
+    amount DECIMAL(15, 2) NOT NULL,
+    compare_at_amount DECIMAL(15, 2),
+
+    -- Recurring pricing (for subscriptions)
+    billing_period VARCHAR(20),
+    billing_interval INT,
+
+    -- Tiered pricing
+    min_quantity INT DEFAULT 1,
+    max_quantity INT,
+
+    -- Validity
+    valid_from TIMESTAMPTZ,
+    valid_until TIMESTAMPTZ,
+
+    -- Priority (for overlapping prices)
+    priority INT DEFAULT 0,
+
+    -- Status
+    is_active BOOLEAN DEFAULT TRUE,
+
+    -- Audit
+    created_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    updated_at TIMESTAMPTZ DEFAULT NOW() NOT NULL,
+    deleted_at TIMESTAMPTZ,
+
+    -- Constraints
+    CONSTRAINT check_price_reference CHECK (
+        (product_id IS NOT NULL AND variant_id IS NULL) OR
+        (product_id IS NULL AND variant_id IS NOT NULL)
+    ),
+    CONSTRAINT check_amount CHECK (amount >= 0),
+    CONSTRAINT check_quantity_range CHECK (
+        min_quantity > 0 AND (max_quantity IS NULL OR max_quantity >= min_quantity)
+    )
+);
+
+COMMENT ON TABLE portfolio.prices IS 'Multi-currency pricing for products and variants';
+COMMENT ON COLUMN portfolio.prices.billing_period IS 'day, week, month, year for recurring prices';
+
+-- ============================================
+-- Triggers for updated_at
+-- ============================================
+CREATE OR REPLACE FUNCTION portfolio.update_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER trg_categories_updated_at
+    BEFORE UPDATE ON portfolio.categories
+    FOR EACH ROW
+    EXECUTE FUNCTION portfolio.update_updated_at();
+
+CREATE TRIGGER trg_products_updated_at
+    BEFORE UPDATE ON portfolio.products
+    FOR EACH ROW
+    EXECUTE FUNCTION portfolio.update_updated_at();
+
+CREATE TRIGGER trg_variants_updated_at
+    BEFORE UPDATE ON portfolio.variants
+    FOR EACH ROW
+    EXECUTE FUNCTION portfolio.update_updated_at();
+
+CREATE TRIGGER trg_prices_updated_at
+    BEFORE UPDATE ON portfolio.prices
+    FOR EACH ROW
+    EXECUTE FUNCTION portfolio.update_updated_at();
diff --git a/ddl/schemas/portfolio/04-rls.sql b/ddl/schemas/portfolio/04-rls.sql
new file mode 100644
index 0000000..cfe7a30
--- /dev/null
+++ b/ddl/schemas/portfolio/04-rls.sql
@@ -0,0 +1,85 @@
+-- ============================================
+-- TEMPLATE-SAAS: Portfolio Row Level Security
+-- Version: 1.0.0
+-- Module: SAAS-019
+-- ============================================
+
+-- ============================================
+-- Enable RLS on all tables
+-- ============================================
+ALTER TABLE portfolio.categories ENABLE ROW LEVEL SECURITY;
+ALTER TABLE portfolio.products ENABLE ROW LEVEL SECURITY;
+ALTER TABLE portfolio.variants ENABLE ROW LEVEL SECURITY;
+ALTER TABLE portfolio.prices ENABLE ROW LEVEL SECURITY;
+
+-- ============================================
+-- Categories Policies
+-- ============================================
+CREATE POLICY categories_tenant_isolation ON portfolio.categories
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY categories_insert ON portfolio.categories
+    FOR INSERT
+    WITH CHECK (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY categories_update ON portfolio.categories
+    FOR UPDATE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY categories_delete ON portfolio.categories
+    FOR DELETE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+-- ============================================
+-- Products Policies
+-- ============================================
+CREATE POLICY products_tenant_isolation ON portfolio.products
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY products_insert ON portfolio.products
+    FOR INSERT
+    WITH CHECK (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY products_update ON portfolio.products
+    FOR UPDATE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY products_delete ON portfolio.products
+    FOR DELETE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+-- ============================================
+-- Variants Policies
+-- ============================================
+CREATE POLICY variants_tenant_isolation ON portfolio.variants
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY variants_insert ON portfolio.variants
+    FOR INSERT
+    WITH CHECK (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY variants_update ON portfolio.variants
+    FOR UPDATE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY variants_delete ON portfolio.variants
+    FOR DELETE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+-- ============================================
+-- Prices Policies
+-- ============================================
+CREATE POLICY prices_tenant_isolation ON portfolio.prices
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY prices_insert ON portfolio.prices
+    FOR INSERT
+    WITH CHECK (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY prices_update ON portfolio.prices
+    FOR UPDATE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
+
+CREATE POLICY prices_delete ON portfolio.prices
+    FOR DELETE
+    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);
diff --git a/ddl/schemas/portfolio/05-indexes.sql b/ddl/schemas/portfolio/05-indexes.sql
new file mode 100644
index 0000000..04e58cd
--- /dev/null
+++ b/ddl/schemas/portfolio/05-indexes.sql
@@ -0,0 +1,119 @@
+-- ============================================
+-- TEMPLATE-SAAS: Portfolio Indexes
+-- Version: 1.0.0
+-- Module: SAAS-019
+-- ============================================
+
+-- ============================================
+-- Categories Indexes
+-- ============================================
+CREATE INDEX idx_categories_tenant ON portfolio.categories(tenant_id);
+CREATE INDEX idx_categories_parent ON portfolio.categories(tenant_id, parent_id);
+CREATE INDEX idx_categories_slug ON portfolio.categories(tenant_id, slug);
+CREATE INDEX idx_categories_position ON portfolio.categories(tenant_id, parent_id, position);
+CREATE INDEX idx_categories_active ON portfolio.categories(tenant_id, is_active) WHERE is_active = TRUE;
+
+-- Soft delete filter
+CREATE INDEX idx_categories_not_deleted ON portfolio.categories(tenant_id)
+    WHERE deleted_at IS NULL;
+
+-- ============================================
+-- Products Indexes
+-- ============================================
+-- Primary indexes
+CREATE INDEX idx_products_tenant ON portfolio.products(tenant_id);
+CREATE INDEX idx_products_category ON portfolio.products(tenant_id, category_id) WHERE category_id IS NOT NULL;
+CREATE INDEX idx_products_slug ON portfolio.products(tenant_id, slug);
+CREATE INDEX idx_products_sku ON portfolio.products(tenant_id, sku) WHERE sku IS NOT NULL;
+CREATE INDEX idx_products_status ON portfolio.products(tenant_id, status);
+CREATE INDEX idx_products_type ON portfolio.products(tenant_id, product_type);
+
+-- Search indexes
+CREATE INDEX idx_products_name_search ON portfolio.products
+    USING gin(to_tsvector('simple', name));
+
+-- Filtering indexes
+CREATE INDEX idx_products_visible ON portfolio.products(tenant_id, is_visible, status)
+    WHERE is_visible = TRUE AND deleted_at IS NULL;
+CREATE INDEX idx_products_featured ON portfolio.products(tenant_id, is_featured)
+    WHERE is_featured = TRUE AND deleted_at IS NULL;
+
+-- Price range queries
+CREATE INDEX idx_products_price ON portfolio.products(tenant_id, base_price);
+
+-- Inventory queries
+CREATE INDEX idx_products_low_stock ON portfolio.products(tenant_id, stock_quantity)
+    WHERE track_inventory = TRUE AND deleted_at IS NULL;
+CREATE INDEX idx_products_out_of_stock ON portfolio.products(tenant_id)
+    WHERE track_inventory = TRUE AND stock_quantity <= 0 AND deleted_at IS NULL;
+
+-- Soft delete filter
+CREATE INDEX idx_products_active ON portfolio.products(tenant_id)
+    WHERE deleted_at IS NULL;
+
+-- Catalog view (common query pattern)
+CREATE INDEX idx_products_catalog ON portfolio.products(tenant_id, category_id, status, base_price)
+    WHERE deleted_at IS NULL AND is_visible = TRUE;
+
+-- ============================================
+-- Variants Indexes
+-- ============================================
+CREATE INDEX idx_variants_tenant ON portfolio.variants(tenant_id);
+CREATE INDEX idx_variants_product ON portfolio.variants(product_id);
+CREATE INDEX idx_variants_sku ON portfolio.variants(tenant_id, sku) WHERE sku IS NOT NULL;
+CREATE INDEX idx_variants_position ON portfolio.variants(product_id, position);
+
+-- Inventory queries
+CREATE INDEX idx_variants_stock ON portfolio.variants(tenant_id, stock_quantity);
+
+-- Active variants
+CREATE INDEX idx_variants_active ON portfolio.variants(product_id, is_active)
+    WHERE is_active = TRUE AND deleted_at IS NULL;
+
+-- Soft delete filter
+CREATE INDEX idx_variants_not_deleted ON portfolio.variants(tenant_id)
+    WHERE deleted_at IS NULL;
+
+-- ============================================
+-- Prices Indexes
+-- ============================================
+CREATE INDEX idx_prices_tenant ON portfolio.prices(tenant_id);
+CREATE INDEX idx_prices_product ON portfolio.prices(product_id) WHERE product_id IS NOT NULL;
+CREATE INDEX idx_prices_variant ON portfolio.prices(variant_id) WHERE variant_id IS NOT NULL;
+CREATE INDEX idx_prices_currency ON portfolio.prices(tenant_id, currency);
+CREATE INDEX idx_prices_type ON portfolio.prices(tenant_id, price_type);
+
+-- Active prices
+CREATE INDEX idx_prices_active ON portfolio.prices(tenant_id, is_active)
+    WHERE is_active = TRUE AND deleted_at IS NULL;
+
+-- Time-based price queries
+CREATE INDEX idx_prices_validity ON portfolio.prices(tenant_id, valid_from, valid_until)
+    WHERE is_active = TRUE AND deleted_at IS NULL;
+
+-- Priority for price selection
+CREATE INDEX idx_prices_priority ON portfolio.prices(product_id, currency, priority DESC)
+    WHERE is_active = TRUE AND deleted_at IS NULL;
+
+-- Soft delete filter
+CREATE INDEX idx_prices_not_deleted ON portfolio.prices(tenant_id)
+    WHERE deleted_at IS NULL;
+
+-- ============================================
+-- Composite indexes for common queries
+-- ============================================
+
+-- Product listing with category
+CREATE INDEX idx_products_category_listing ON portfolio.products(tenant_id, category_id, status, position)
+    WHERE deleted_at IS NULL AND is_visible = TRUE;
+
+-- Product search by tags
+CREATE INDEX idx_products_tags ON portfolio.products USING gin(tags);
+
+-- Variant lookup for product
+CREATE INDEX idx_variants_product_active ON portfolio.variants(product_id, position)
+    WHERE is_active = TRUE AND deleted_at IS NULL;
+
+-- Price lookup for product + currency
+CREATE INDEX idx_prices_product_currency ON portfolio.prices(product_id, currency, priority DESC, valid_from)
+    WHERE is_active = TRUE AND deleted_at IS NULL AND product_id IS NOT NULL;