Senior Software Engineer (Backend)

İstanbul · Hybrid · Full-time · Software

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About the role

System Design

About AppNation We build AI-powered mobile apps that reach millions of users worldwide. Since 2021, AppNation has been creating products across AI, productivity, and mobile experiences. Our apps, including Genie, Translate AI, and Arch, have reached 90M+ users globally and ranked among the top apps in 30+ countries. We are a team of builders, designers, and engineers who move fast, take ownership, and create products used by millions. About the Role We’re looking for a Senior Software Engineer (Backend) to design, build, and evolve the backend systems behind our AI-powered mobile apps. You’ll work on production systems that power mobile experiences used by millions of users, building reliable APIs, data-intensive services, asynchronous workflows, and integrations with AI and third-party platforms. This is a hands-on engineering role with strong ownership across system design, implementation, testing, performance, and production reliability. You’ll also help raise the engineering bar through technical decisions, code reviews, mentoring, and better development practices.