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Senior Backend Software Engineer (Node.js & TypeScript)

appnation • Türkiye
Relocation
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AI Summary

Design, build, and maintain scalable backend systems and APIs for AI-powered mobile apps using Node.js and TypeScript. Own the full lifecycle of backend features, including distributed workflows, database optimization, and production reliability. Requires 6+ years of experience with production backend systems, relational databases, and asynchronous event-driven architectures.

Key Highlights
Build and scale backend systems powering AI-powered mobile apps with 90M+ users.
Strong focus on Node.js, TypeScript, PostgreSQL, and Redis for high-reliability services.
Hands-on role involving system design, performance optimization, and mentoring.

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Key Responsibilities
Design, build, and maintain scalable backend services and APIs using Node.js and TypeScript.
Own backend features from technical design and implementation through testing, deployment, observability, and production validation.
Design reliable distributed and asynchronous workflows using message brokers, queues, background workers, and event-driven patterns.
Build AI-powered product capabilities and integrate backend systems with LLMs, AI providers, and internal AI platforms.
Design and optimize relational data models using PostgreSQL and MySQL, including indexing, query optimization, migrations, transactions, and concurrency considerations.
Use Redis effectively for caching, distributed coordination, rate limiting, queues, and other appropriate workloads.
Design systems with failure in mind, applying appropriate timeout, retry, idempotency, fallback, backpressure, and graceful-degradation strategies.
Write comprehensive unit and integration tests and contribute to end-to-end testing of critical product flows.
Investigate production issues using logs, metrics, traces, and profiling; identify root causes and implement lasting improvements.
Contribute to architectural decisions, technical design reviews, code reviews, and engineering standards.
Work effectively with Docker and containerized environments and understand how backend services operate on Kubernetes and cloud infrastructure.
Collaborate closely with mobile, AI, product, and infrastructure teams to turn product requirements into reliable technical solutions.
Use modern AI-assisted development tools effectively for coding, testing, debugging, research, and engineering productivity without compromising correctness or code quality.
Mentor other engineers and help improve engineering practices across the team.
Technical Skills Required
Node.js TypeScript PostgreSQL

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Benefits & Perks
Private health insurance
Meal and commute support
Relocation support
Flexible working options

Job Description

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.

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Job Overview
Posted Date Oct 16, 2026
Employment Type Full-time
Experience Level Mid-Senior level
Location Türkiye
Category Programming
Company appnation
Mentioned Skills
typescript node.js mysql postgresql redis rabbitmq google cloud platform ai storage design systems kubernetes docker kafka cloud

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