In progress

Expert Android Mobile App Development with Kotlin and Java

Published on the October 07, 2026 in IT & Programming

About this project

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Android + backend developer for a children's phone product (3 jobs, fixed price per job)
We're a Barcelona-based startup building a safe phone experience for children on Samsung handsets. The product is in beta with real families. The app is written in Kotlin, and the server runs Node.js (Render, Redis, Firebase FCM).
1. Private app store (phase one). Updates are currently installed by cable. We need our own private app store for managed phones. The server hosts approved apps and their latest versions, and phones check in, download and install updates silently in the background. Phase one covers our own apps and the move from debug builds to signed release builds. The design must allow third-party apps to be added later. Please quote phase one, and give a rough estimate for the full store.
2. Parental control via Telegram. A Telegram bot that lets parents send simple commands to their child's phone, with support for more than one parent per device. It replaces an existing messaging channel on our server.
3. Subscriptions and billing. Annual subscriptions through a payment gateway such as Stripe, with sign-up, renewal and cancellation tied to each device.
How we work: We start with job 1 as a fixed-price trial. If it goes well, we move on to the others. Communication can be in Spanish or English. You must be able to issue invoices, either as a freelancer or through a company.

Our budget is quite low for all of this but there could me more work in the future after we get angel funding.

Category IT & Programming
Subcategory Apps programming. Android, iOS and others
What is the scope of the project? Medium-sized change

Delivery term: Not specified

Skills needed