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# Mid Backend Developer (Firebase) - Part-time - APAC/EMEA

- **Company:** Arc Full-time
- **Location:** United States (Remote available)
- **Experience:** Experienced
- **Contract:** Temporary contract
- **Skills:** Flutter, BigQuery, Databases, Data Loss, Push Technology, Mobile Application Software, Operational Databases, Google Cloud, Firebase, Indexer, Backend, Google Cloud Functions
- **Published:** August 26, 2026
- **Apply:** https://arc.dev/signup?userType=developer&publicRandomKey=pd1r8ash8a&to=https%3A%2F%2Farc.dev%2Fdashboard%2Fd%2Fverified-jobs%2Fpd1r8ash8a%2Fapplication

## About the Role

* Firebase Backend Development Proven, hands-on experience designing and operating Firebase backends that support real users at scale. This includes Firestore, Cloud Functions, security rules, indexing strategy, and a working understanding of the platform's cost model sufficient to keep it under control as usage grows.
 * Data Modelling Demonstrated expertise in Firestore data modelling, including direct experience redesigning a schema that did not hold up under growth. Candidates should be able to speak concretely about trade-offs in read/write patterns and cost per operation.
 * Production Data Migrations Experience planning and executing migrations against live production databases without downtime or data loss, including dry runs, verification steps, and a clear rollback plan.
 * Operational Experience Experience supporting a live application with a real user base, including firsthand experience managing the downstream impact of production issues.
 * AI-Assisted Development Experience operating multiple AI coding agents in parallel, paired with a rigorous and repeatable process for reviewing and validating their output before it reaches production. This is a requirement for the role, not a preference.
 * Ownership & Autonomy Comfort taking full ownership of a technical domain within a small team, and the ability to work effectively from desired outcomes rather than detailed specifications., * Experience with in-app subscriptions (RevenueCat, StoreKit, Play Billing), push notifications at scale, hosted search, BigQuery or analytics pipelines, and Google Cloud Platform services beyond Firebase.
 * Flutter Development Ability to write and ship production-quality Flutter code independently, without close supervision.

## Description

This is a senior, backend-weighted engineering position supporting a live, revenue-generating mobile application with a substantial existing user base on iOS and Android.

The role is approximately 80% backend infrastructure and 20% Flutter client work, structured as an ongoing part-time contract with significant ownership over technical decisions within the backend domain.


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