Below are top-rated e-commerce development firms in Singapore (strong client reviews, regional presence, and specialist platform expertise). I include each firm’s core strengths and a source you can check for reviews, portfolios and contact details.

1. SmartOSC — enterprise e-commerce & omnichannel implementations (Magento, SAP Commerce, Shopify Plus). Global agency with a major Southeast Asia presence and deep platform experience for mid‑to‑enterprise merchants. (mgt-commerce.com)

2. BORN Group — digital commerce + creative experience agency that handles large Magento/Shopify Plus implementations and design-forward stores for global brands. Good for brand-driven, high-UX projects. (mgt-commerce.com)

3. Vaimo — international Magento/Adobe Commerce specialist with strong capabilities in complex integrations, performance optimization and growth-driven commerce. Suited for retail and B2B merchants scaling across markets. (mgt-commerce.com)

4. eFusion Technology — Singapore-based Shopify & Magento developer noted on regional directories for Shopify builds and local e-commerce projects (SMB to mid-market). Good local partner for faster time-to-market. (clutch.co)

5. TechTIQ Solutions — full‑service software house offering e‑commerce builds (Magento, custom stacks), integrations and enterprise projects; has regional corporate clients and platform experience. (mayuraconsultancy.com)

6. Webpuppies Digital — long-established Singapore web and e‑commerce shop with strong UX/design capabilities and many local projects; suitable for SMEs wanting end‑to‑end design + build. (mayuraconsultancy.com)

7. Stridec Worldwide — local e‑commerce & Magento developer that’s consistently ranked on Singapore agency lists and directories; good for mid‑market Magento/Shopify projects. (themanifest.com)

8. Rave Digital — Singapore e‑commerce specialist noted for Magento maintenance and Shopify development; strong client review scores on directories focused on developers. (clutch.co)

9. iCore (iCore Singapore) — regional Magento/e‑commerce consultancy referenced in multiple “top Magento” lists; good for custom Magento solutions and integrations. (mgt-commerce.com)

10. Tigren (regional presence) — Magento/Shopify developer recommended for cost‑effective Magento builds and extensions; suitable for growing merchants and custom module work. (mgt-commerce.com)

How to pick the right firm (quick checklist)

• Platform fit: Shopify/Shopify Plus for faster SMB/retail launches; Magento/Adobe Commerce for complex catalogs, B2B, or large-scale customization.
• Proven projects: ask for live store URLs and references in your vertical.
• Integrations: confirm experience with your ERP/OMS/fulfillment/payment providers.
• SLAs & support: post‑launch maintenance and performance/Security SLAs.
• Budget & timeline: get 2–3 proposals with scope, milestones and TCO.

Would you like me to:

• Narrow this to firms that specialize in Shopify/Shopify Plus, Magento/Adobe Commerce, or headless commerce?
• Shortlist 3 agencies and draft an RFP that you can send to them?

(If you want direct contact pages or recent client case studies for any of the firms above I can fetch and link those next.)