BigCommerce is the SaaS e-commerce platform competing with Shopify — used by 60K+ stores and many enterprise brands. The interview emphasizes multi-tenant SaaS, store customization, and the realities of being the runner-up to Shopify in a competitive market.
Process
Recruiter screen → 60-minute coding phone (DSA medium) → onsite virtual: 2 coding, 1 system design, 1 craft deep-dive, 1 behavioral. Cycle: 3–4 weeks.
What they actually ask
- Design multi-tenant catalog and storefront system. This is the flagship prompt: share one platform across thousands of stores while keeping each store’s data isolated. Expect to discuss tenant isolation (a row-level tenant ID vs a schema per store), how one catalog service serves both a 10-SKU boutique and an enterprise store with hundreds of thousands of products, and where sharding and indexing keep per-store queries fast under a noisy-neighbor load.
- Design a flexible theme/template engine. They want a rendering system merchants customize without touching platform code. Talk through a sandboxed templating language, caching of compiled templates and rendered pages, and how you roll out a schema or component change without breaking every store’s live theme.
- Design a payment integration framework supporting multiple processors. The goal is one interface behind many gateways (Stripe, PayPal, Adyen, regional processors). Interviewers probe idempotency on retries, webhook handling and asynchronous settlement, keeping PCI scope small, and graceful failover when a processor goes down mid-checkout.
- Coding: medium DSA, often with multi-tenancy framing. Expect LeetCode-medium problems on arrays, hash maps, and graphs, sometimes wrapped in a store or catalog scenario. Rehearse the common patterns so you spot the shape quickly, and state your time and space complexity as you go.
- Behavioral: customer focus, ownership, navigating mature SaaS. Prepare stories about shipping for demanding merchants, owning an incident end to end, and making tradeoffs inside a large legacy codebase. Structure each answer with the STAR method and lead with the customer impact.
Levels and comp (2026)
- SE II: $135K–$170K total
- Senior SE: $200K–$260K
- Staff: $290K–$380K
- Principal: $400K–$520K
These are total-comp ranges — model a specific offer with a total comp calculator and read up on salary negotiation before you counter.
Prep priorities
- Be fluent in PHP (legacy core) and Node.js/TypeScript (newer services). Expect questions about how the older PHP monolith and the newer services coexist, and how you’d add a feature that spans both.
- Understand multi-tenant SaaS architecture. Know tenant isolation, per-store configuration, and how a single deploy serves every store at once — this feeds directly into the system design round.
- Brush up on e-commerce protocols and payment processing. Know checkout and cart/inventory consistency, webhooks for order and payment events, and how card data moves through a gateway without landing in your systems.
Frequently Asked Questions
Is BigCommerce remote-friendly?
Hybrid in Austin (HQ), Sydney, San Francisco. Many engineering roles remote within US.
How does BigCommerce compare to Shopify?
Shopify is the dominant SMB platform; BigCommerce wins more enterprise deals. Shopify engineering pays meaningfully more on equity. BigCommerce comp is mid-tier; benefits and culture solid.
What is the engineering culture?
Mature SaaS — predictable, customer-focused, healthy work-life balance. Less competitive than Shopify but stable.
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