Question 1

You are Head of E-commerce at a major brand. Walk us through your 11.11 campaign preparation plan from T-30 to D-day, covering the Early Access and Shock Sale sub-phases. How would you allocate budget and resources across each phase?

Accepted Answer

T-30 to T-15 (Foundation): Lock in deals with Shopee/Lazada/TikTok Shop for Flash Sale slots, platform vouchers, and 11.11 badges. Confirm hero SKU inventory with warehouse - target minimum 120% of GMV forecast to avoid mid-campaign stockouts. Prepare listings: update 11.11 banners, combo bundles, and Early Access pricing. Brief agency/KOC on warm-up content schedule. T-14 to T-7 (Warm-up): Increase Shopee Ads/TikTok Ads by 20-30% to build traffic. Early Access phase (usually T-7 to T-1): open sales at preferred pricing for wishlisted/following customers, limit quantities to create FOMO. Run daily TikTok livestream with countdown. Push notifications and chat broadcast to all followers. T-6 to T-2 (Content blitz): KOC posts reviews, unboxings, price comparisons. Release free shipping vouchers + extra discounts to stimulate demand. T-1 (Final prep): Brief ops, CS, warehouse teams - assign 24-hour duty shifts. Retest all listings, prices, vouchers. Disable all CS auto-replies to ensure real responses. D-Day (Shock Sale): 00:00-02:00 is the peak window - deepest Shock Sale price, limit 1-2 orders per person. 06:00-09:00 and 12:00-14:00 are the next waves. 80% of Ads budget concentrated in these 3 windows. Monitor real-time dashboard every 30 minutes. Budget split: 60% on D-day, 25% warm-up T-7 to T-1, 15% Early Access. This is the flagship question in Head/Manager E-commerce interviews. The recruiter needs to see the candidate can coordinate across multiple departments (Marketing, Ops, CS, Warehouse) and think about each distinct phase - not just treat '11.11' as a single event. Outstanding candidates will address the specifics of each sub-phase: Early Access is a loyalty mechanic (rewarding existing customers), while Shock Sale is an acquisition mechanic (attracting new buyers). These require different budgets and messaging. High bonus points if the candidate knows Shopee typically features 'Super Flash Sale' at 00:00 and 12:00, and brands that don't secure these slots miss a major opportunity. Candidates should also mention post-event analysis from T+1 to T+3 to capture data and prepare for 12.12.

Question 2

Your Shopee shop's conversion rate suddenly dropped 40% compared to the previous week with no changes to pricing or products. Walk us through your step-by-step diagnostic process to identify the root cause.

Accepted Answer

Step 1 - Verify data (5 min): Go to Shopee Seller Centre > Business Insights > compare sessions, product impressions, add-to-cart, and orders by day. Confirm traffic hasn't changed (if traffic also dropped, the cause is different). Segment: overall shop conversion rate vs individual listings. Step 2 - Technical checks (15 min): Check all listings are active - any listings hidden due to violations. Check pricing - any listing with price errors (0 VND or incorrect entry). Check stock - any 'sold out' listings don't count toward conversion. Check shipping - has Shopee changed Free Shipping policy. Step 3 - Competitor analysis (20 min): Search your shop's main keywords - is any competitor running bigger Flash Sales or vouchers. Check if new competitors appeared in top search with lower prices. Step 4 - Traffic source analysis (15 min): Compare traffic ratio from Shopee Search, Shopee Ads, direct, and external. If Shopee Search dropped, algorithm may have adjusted (check shop score). If Ads performance dropped, review campaigns. Step 5 - User behavior analysis (20 min): Check if add-to-cart rate dropped - if yes, problem is on product page (images, description, price). If add-to-cart is fine but checkout dropped, problem is at checkout (shipping fee, no voucher). Step 6 - Corrective action: Prioritize the highest-probability root cause and implement fix immediately. Schedule a recheck after 24-48 hours. This question tests analytical thinking and the ability to debug complex systems under pressure. The recruiter needs to see a systematic process - not emotional reactions ('must be a Shopee algorithm change'). The key insight is funnel decomposition: Impression > Click > Add-to-cart > Checkout > Order. A sharp drop at each step points to a different category of root causes. Strong candidates will know that Shopee Seller Centre has a 'Shop Score' metric (chat response rate, fulfillment rate, return rate) and that if the score drops below threshold, Shopee automatically reduces organic reach. Bonus points for mentioning external tools like SimilarWeb to compare traffic with competitors, or Shopee Product Research to track competitor pricing.

Question 3

Your brand sells simultaneously on Shopee, TikTok Shop, and Lazada with shared SKUs. When an order is placed on Shopee, the system must immediately update inventory on TikTok Shop and Lazada. How would you design this multi-marketplace inventory sync solution with a single ERP backend?

Accepted Answer

The solution architecture has 3 layers: Layer 1 - ERP as Single Source of Truth: All actual inventory exists only in the ERP (Sapo, KiotViet, NetSuite, or custom-built). ERP never pushes 100% of inventory to platforms - maintains a 10-15% safety buffer. Layer 2 - Sync middleware: Use multi-channel management tools like Haravan, OnPoint, GHN Multi-channel, or Unicommerce. Middleware receives webhooks from all platforms when a new order arrives, updates ERP inventory, then pushes new figures to the remaining platforms within 60 seconds. Layer 3 - Buffer zone and rules: Never display full actual inventory on any platform. Example: 100 actual units → ERP holds 10 as buffer, pushes 90 to platforms, allocated by ratio (Shopee 50, TikTok 25, Lazada 15). When a platform drops below alert threshold (e.g., 5 units), ERP automatically replenishes from buffer. Race condition handling: if 3 orders placed simultaneously across 3 platforms when only 1 unit remains, prioritize based on pre-configured platform order, auto-cancel the other 2 and have CS apologize to customers. Monitoring: immediate alert when any platform hits 0 stock for ops team to handle. This is the most technically advanced operational question in E-commerce interviews, typically only asked at Head or Director level. The recruiter wants to know if the candidate understands the real technical constraints of Shopee and TikTok Shop APIs - both have rate limits (maximum API calls per minute), so truly real-time sync is impossible and some minimum latency must be accepted. Strong candidates must acknowledge that no solution completely eliminates oversell risk during extremely fast flash sales - the goal is to minimize it. High bonus points if the candidate knows tools actually used in Vietnam: Haravan OmniChannel, OnPoint (brand operation unit), or custom-built solutions for tech-capable teams.

Question 4

Your shop's COD (Cash on Delivery) return rate is at 25%, above the industry benchmark of 15-18%. Two-way shipping costs and return fees are seriously eroding profit margins. What strategy would you implement to bring this rate below 15% within 3 months?

Accepted Answer

Root cause analysis first (weeks 1-2): Analyze return data by: (1) SKU/category - which SKUs have the highest returns, (2) geography - which provinces have the highest rates (rural provinces typically have higher COD failure than major cities), (3) traffic channel - orders from TikTok Ads have higher return rates than organic due to lower purchase intent, (4) delivery time - orders taking more than 5 days have higher rejection rates. Cause groups and corresponding solutions: Cause 1 - Product doesn't match expectations: Improve product photos (add real-use photos, 360-degree video), add accurate size guides, update descriptions honestly. Cause 2 - Customer not home/not answering: Partner with carrier to call ahead before delivery, ask customers to confirm address via Shopee chat 24h before delivery. Cause 3 - Customer changed mind: Add order confirmation step via SMS or Zalo OTP (for off-platform website). Cause 4 - Fraud orders: Blacklist addresses/phone numbers that previously refused delivery, auto-hold orders from high-risk addresses for CS confirmation before shipping. Prepaid incentives: Extra 5-10% discount voucher when choosing online payment. Free shipping for prepaid orders, add 10K-20K COD surcharge. 3-month targets: Month 1 - analyze and implement order confirmation process. Month 2 - fraud blacklisting, prepaid incentives. Month 3 - evaluate and fine-tune. COD accounts for 60-70% of total e-commerce orders in Vietnam (per Ninja Van and GHN reports), making COD failure management one of the most critical operational skills for E-commerce Managers in this market. The recruiter needs to see the candidate understands cultural specifics: Vietnamese customers tend to avoid canceling online but will readily refuse at the door. This is fundamentally different from developed markets where prepaid rates are very high. Outstanding candidates will understand that two-way return shipping fees can wipe out the entire margin on a single order (example: 100K VND order with 40K two-way shipping + 10K COD fee = burning 50K on one rejected delivery). Bonus points for mentioning partnerships with logistics providers to get COD failure reports by geography and time.

Question 5

You are managing a 100 million VND/month Shopee Ads budget for a beauty brand. Current ROAS is 4x while the beauty industry benchmark is 5-8x. How would you analyze and optimize campaigns to bring ROAS to industry standard within 60 days?

Accepted Answer

Phase 1 - Full campaign audit (days 1-7): Analyze each campaign by: ROAS, CPC, CTR, conversion rate, and ACoS (Advertising Cost of Sales). Categorize campaigns into 3 groups: (A) ROAS ≥ 6x - star campaigns, increase budget; (B) ROAS 3-6x - need optimization; (C) ROAS < 3x - pause immediately or restructure. Review current budget allocation: typically 60-70% should go to Search Ads (keyword targeting), 20-30% to Discovery Ads, remainder to Shop Ads. Phase 2 - Keyword and bidding optimization (days 8-30): In beauty, long-tail keywords (brand name + specific benefit like 'vitamin C whitening serum') typically have higher conversion rates than generic terms. Remove keywords with CTR < 0.3% or zero conversions after 500 impressions. Apply Shopee Smart Ads (auto-bidding) to campaigns with sufficient data, manual bidding for new campaigns. Optimize ad scheduling: concentrate budget on 06:00-09:00, 12:00-14:00, and 20:00-23:00 (peak shopping hours for beauty in VN). Phase 3 - Creative and listing optimization (days 15-45): A/B test product images - before/after images typically achieve 40% higher CTR than plain white background. Improve listing: title contains purchase keywords, description highlights USP clearly in first 3 lines. Ensure Review Rating ≥ 4.5 stars - low reviews are a conversion rate killer in beauty. Phase 4 - Budget reallocation (days 30-60): Shift 30% budget from Group C to Group A campaigns. Test Shopee Brand Ads if budget allows. ROAS benchmarks by category are critical knowledge many candidates lack: beauty 5-8x, electronics 3-5x, fashion 4-6x, FMCG 3-4x. These numbers reflect each category's margin profile - beauty has 50-70% gross margin so can sustain lower ROAS than electronics (10-20% margin). The recruiter wants to see the candidate doesn't just 'raise bids to improve ROAS' but understands the full funnel: from keyword selection to listing quality to competitive pricing. The key insight is understanding ACoS (Advertising Cost of Sales) = 1/ROAS, and working backwards to calculate maximum acceptable ACoS based on the product's gross margin. Outstanding candidates will mention segmenting ROAS by individual SKU - hero SKUs typically achieve higher ROAS than secondary SKUs.

Question 6

You are tasked with building a TikTok Shop Affiliate and KOC program from scratch for a household goods brand expanding into TikTok Shop. Design the commission structure, KOC selection process, and performance tracking system.

Accepted Answer

Part 1 - Commission structure: Performance-based tiers: Tier 1 (Nano-KOC, under 10K followers or new KOC): 8-10% commission per successful order. Tier 2 (Micro-KOC, 10K-100K followers, performance ≥ 50 orders/month): 12-15% commission + volume bonus (hit 200 orders/month = +2%). Tier 3 (Mid-KOC, 100K-500K, performance ≥ 200 orders/month): 15-18% + exclusive vouchers to create better deals. Tier 4 (Macro-KOC/KOL, 500K+): fixed fee + 8-10% commission, negotiate individually. Sample products: Tier 1-2 purchase at cost price (70% retail). Tier 3-4 receive free samples. Part 2 - KOC selection process: Recruitment channels: TikTok Shop Creator Marketplace (Affiliate Center), direct inbox outreach, and referrals from existing KOCs. Screening criteria: engagement rate ≥ 3% (more important than follower count), audience demographics match (women 25-45 for household goods), at least 2 home/family-related videos in the past 30 days. Onboarding process: sign up via TikTok Shop Affiliate Center, sign affiliate agreement clearly specifying content guidelines (no competitor bashing, must tag #ad, no counterfeit promotion). 30-minute product training and demo techniques for live viewers. Part 3 - Tracking system: TikTok Shop Affiliate Center provides unique tracking link per KOC - automatically tracks clicks, orders, and commission. Weekly reporting dashboard: GMV per KOC, conversion rate, average order value, return rate. Monthly KPI evaluation: GMV, order count, view-to-order conversion rate, and content quality (comment sentiment). Offboard KOCs with return rate > 20% or content generating negative reactions. TikTok Shop Affiliate is one of the fastest-growing channels in Vietnam from 2023-2025. The key difference from traditional KOL marketing is the affiliate model pays on performance (cost per sale), not on reach or impressions. The recruiter wants to see the candidate understands the difference between KOL (celebrity, fixed fee, brand awareness) and KOC (Key Opinion Consumer, typically ordinary consumers, performance-based, conversion-focused). Strong candidates will know that for household goods, nano and micro KOCs typically have higher conversion rates than macro KOLs because audiences trust 'people like me' more. Bonus points for knowing how to use TikTok Shop Affiliate Center for tracking setup and awareness of TikTok's 'Shop Bonus' mechanism rewarding top-performing KOCs.

Question 7

Build a practical Customer Lifetime Value (LTV) model for the Vietnamese e-commerce market, accounting for the high COD rate (60-70%) and high return rate. How would you use this model to drive marketing decisions?

Accepted Answer

Step 1 - Define LTV components adjusted for VN market: Raw LTV = AOV × Purchase Frequency × Customer Lifespan. But with Vietnam's specifics, adjustments needed: Adjusted LTV = (AOV × (1 - Return Rate) - COD Fee × COD Rate - Return Shipping Fee × Return Rate) × Purchase Frequency × Customer Lifespan × Gross Margin. Specific example for fashion: AOV = 300K VND, Return Rate = 20%, COD Rate = 65%, Average COD Fee = 25K, Return Shipping (2-way) = 40K, Gross Margin = 45%, Purchase Frequency = 4 times/year, Lifespan = 1.5 years. Net revenue per order = 300K × (1-0.2) - 25K × 0.65 - 40K × 0.2 = 240K - 16.25K - 8K = 215.75K. LTV = 215.75K × 0.45 × 4 × 1.5 = 582.5K VND. Step 2 - Segment customers by LTV: Use RFM (Recency, Frequency, Monetary) to group: Champions (recent purchase, frequent, high value), Loyal, At-risk, Lost. Calculate predicted LTV for each segment. Step 3 - Marketing decisions based on LTV: Maximum CAC = LTV / 3 (healthy LTV:CAC ratio = 3:1). From example above: Max CAC = 582.5K / 3 = ~194K VND. Budget allocation: invest more in retention of Champions (low cost, high LTV) rather than only acquisition. Channel: prepaid customers have significantly higher LTV because no COD fee and lower return rates - prioritize retargeting this group. Step 4 - Improve LTV: Reduce return rate (increase LTV) through listing improvements. Convert COD to prepaid (increase LTV via fee reduction + lower return rate). Increase Purchase Frequency through loyalty program and email/Zalo remarketing. This question separates genuinely Head-level candidates from those with only tactical experience. Most Vietnamese E-commerce Managers calculate LTV using the basic formula (AOV × Frequency × Lifespan) without adjusting for Vietnam's market specifics. The recruiter needs to see the candidate understands that COD fees and return shipping are real costs that erode LTV, and Vietnam's high COD rate makes LTV in this market significantly lower than in developed markets. The most important insight: a prepaid customer typically has 30-40% higher LTV than a COD customer in the same category because they have stronger purchase intent and lower return rates. Bonus points for mentioning cohort analysis - calculating LTV by first-purchase month cohort for more accurate predictions.

Question 8

Present a strategy to achieve and maintain Shopee Preferred Seller (or Star Seller) status for a shop that has been operating for 6 months and is currently at standard seller level. Which metrics are most important and how would you improve them?

Accepted Answer

Understand Shopee Preferred Seller criteria (2024-2025 update): (1) Shop Rating ≥ 4.8 stars, (2) Response Rate ≥ 85% within 12 hours, (3) Cancellation Rate ≤ 2%, (4) Late Shipment Rate ≤ 2%, (5) Minimum order count varies by category (typically 100+ orders/month), (6) No policy violations in the past 90 days. Strategy to improve each metric: Shop Rating (typically the biggest bottleneck): After each successful delivery, send a thank-you chat and remind customers to leave a review (never promise gifts in exchange for reviews - policy violation). Pack carefully, include thank-you cards to create a WOW moment that motivates positive reviews. For 1-3 star reviews: respond immediately, don't argue, ask for the reason and propose a solution - Shopee evaluates how sellers respond to negative reviews. Response Rate: Enable Shopee Auto-reply for frequently asked questions (price, size, delivery time). Use Quick Reply templates. Enable Shopee push notifications on mobile. Assign a dedicated chat person during peak hours. Late Shipment Rate: Set order cutoff time that matches your packing process (e.g., 14:00). Build standardized packing SOPs to reduce processing time. Partner with multiple logistics providers as backup. Cancellation Rate: Never list products that are out of stock. Sync inventory frequently. Update quantities in real-time. Maintain after achieving: Set internal KPIs 10-15% above the minimum threshold as buffer. Check Shop Health dashboard weekly. Prepare contingency plan for peak seasons when order volume spikes. Shopee Preferred Seller is an important milestone many brands overlook. Practical benefits: badge displayed prominently in listings increases trust and CTR (Split Dragon research shows 15-25% CTR increase), prioritized placement in Shopee search results, and access to special promotional programs from Shopee. The recruiter wants to see the candidate not only knows the criteria but has a specific plan to achieve and maintain it. Important point to address: many shops lose Preferred Seller status during peak seasons (11.11, 12.12) because late shipments spike when orders increase 5-10x. An ops plan for peak seasons is an essential part of the tier maintenance strategy. Outstanding candidates will know that Shopee Mall is a higher tier than Preferred Seller and requires a valid business entity registration in Vietnam.