Shopify · Backend · Engineering
I’m a senior freelance developer building reliable backend applications that integrate with Shopify — from custom apps and webhooks to data pipelines, automation, and third-party systems.
01 Services
Three areas, one standard: code your team can understand, run and extend.
01
Designing and building Python backends that scale with your business — clean domain logic, production-ready APIs, background jobs, and data pipelines.
Emphasis on maintainability, observability, and long-term ownership rather than quick fixes or fragile implementations.
02
Extend Shopify beyond the storefront through custom apps, Admin extensions, and robust API integrations that match real operational workflows.
Experience across complex catalogs, multi-system sync, and edge cases in real-world commerce setups.
03
Automating operations across systems using webhooks, queues, and scheduled jobs to remove manual work and keep data consistent.
Focus on resilience: retries, monitoring, alerting, and predictable failure modes in production environments.
02 Approach
„When you no longer need me, I’ve done my job well.“
Requirements, existing systems and the day-to-day workflows come first. Risks and open questions are named early.
Clear interfaces, tests and monitoring. Failures are expected, visible and recoverable.
Documentation and a structured handover, so your team runs the daily business itself — until the next step.
03 Profile
Deniz Demirsoy founded Dual Citizen and has been self-employed since 2009 — before that, 16 years at Microsoft in sales, technical marketing and partner management.
04 Contact
Send a message and I’ll reply with next steps.
