Emre Ashak (Emre Işık)

Own backend services on a multi-tenant marketing platform serving 1,200+ global brands, spanning a high-throughput Go ingest pipeline and the full Shopify integration surface.

• Built and operate a Go event-ingest pipeline on NSQ processing 17 million events per day across all tenants, the entry point feeding downstream campaigns and analytics.
• Hardened the pipeline with at-least-once delivery, idempotent consumers, retry and dead-letter handling, and backpressure-aware consumer scaling, validated with integration, contract, and load tests.
• Designed and built the multi-tenant Shopify customer-sync service, isolating each brand through a shared-schema tenant_id model across 1,200+ tenants.
• Engineered a daily reconciliation job that raised Shopify-to-platform data accuracy from roughly 60% to 99.99%, surfacing sync drift before it reaches downstream campaigns.
• Delivered Shopify Markets support, unlocking commerce across 8 regions and currencies for global brands.
• Decomposed a multi-tenant Laravel monolith into maintainable services, ran it on AWS with Kubernetes and Terraform through CI/CD, and instrumented it with Prometheus, Grafana, Datadog, and Sentry, contributing to incident response.
• Authored design documents and RFCs, set code-review standards, mentored and onboarded 5+ engineers, and serve part-time as Scrum Master for one team.

Sole engineer for client WWF Market (wwfmarket.com), the WWF Türkiye online store on Shopify Plus. Built the storefront and a custom returns system end to end.

• Built the entire Shopify Plus storefront theme from scratch in Liquid, with PageFly subpages for campaign and content landing.
• Developed a custom returns system (iade.wwfmarket.com) end to end, covering the customer return flow and the operational backend.
• Built a returns analytics admin surfacing return reasons and sizing issues to drive merchandising decisions.
• Integrated Klaviyo flows, segments, and transactional emails across the customer lifecycle.
• Automated marketing and operational campaigns with Shopify automation and Flow.

Contract web and Shopify development for small-business clients between full-time roles, while completing my degree.

Owned the Shopify storefront end to end for an online watch retailer, self-teaching Liquid to build and customize the theme.

• Ran the full storefront from theme to fulfilment, including all product imagery and content.

Frontline IT support across HQ: hardware and software troubleshooting, infrastructure upkeep, and incident triage.

End-to-end encrypted peer-to-peer file sharing with no size limits, plus stored transfers with shareable links.

Native macOS menubar app for Claude Code usage: live limits, cost breakdown, and burn-rate forecast. Signed and notarized.

Free Scrum tooling (retros, planning poker, team health) with no signup or seat fees.