You will get Firebase Cloud Functions + Firestore SaaS | Realtime, Auth, Refactor Ready
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Top Rated
Project details
Production-ready Firebase Cloud Functions and Firestore work for SaaS, marketplaces, and mobile apps. I deliver real Firebase products and also lead the refactor off Firebase when you outgrow it. Recent shipped Firebase work: Inktank Academy e-learning platform for BMW and VW design students (Firebase Cloud Functions and Firestore with security rules in production, then led the refactor off Firebase when it stopped scaling cleanly). What you get: Firestore data model with composite indexes, denormalization where it pays, and security rules with role-based access. Cloud Functions for HTTP, callable, scheduled, Pub/Sub, and Firestore triggers. Firebase Auth (email, Google, Apple, custom claims). Storage with secure download URLs. Hosting and emulator suite for local dev. Cold-start mitigation (regional pinning, min instances). When you hit Firebase limits, I lead the refactor to Postgres or Node without losing the feature set.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$500
|
Standard
$1,800
|
Advanced
$4,500
|
|---|---|---|---|
| Delivery Time | 5 days | 12 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
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HG
Hristo G.
Jan 22, 2026
Technical evaluation of our current platform
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Edgard W.
Dec 29, 2025
Port Headless Wordpress Magazine into React Native (iOS/Android)
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Dominik G.
Dec 26, 2025
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Really enjoyed working with this developer. Communication was easy, fast, and straight to the point. He understood what I needed very quickly and delivered exactly what we discussed - often even better than expected.
What stood out most was his problem-solving mindset. Instead of just following instructions, he actively thought along, suggested improvements, and helped avoid potential issues early on.
Everything was delivered on time, changes were handled quickly, and the overall collaboration felt relaxed and efficient. No unnecessary back and forth - just solid work and great results.
Would definitely work with him again and highly recommend him.
What stood out most was his problem-solving mindset. Instead of just following instructions, he actively thought along, suggested improvements, and helped avoid potential issues early on.
Everything was delivered on time, changes were handled quickly, and the overall collaboration felt relaxed and efficient. No unnecessary back and forth - just solid work and great results.
Would definitely work with him again and highly recommend him.
CH
Cliffe H.
Dec 2, 2024
Full Stack Developer for Next.js Line of Business web app
Alex was great to work with! He is very knowledgeable and did an admirable job getting our application up and running. He was flexible with the work assigned, and was able to complete all that was asked of him with proficiency. We would definitely work with Alex again!
IA
Inktank A.
Mar 3, 2023
Need Angular Frontend Developer for educational platform. Cross-platform web and mobile Development
About Alexander
React Native Developer | Mobile App Developer | iOS Android Expo
100%
Job Success
Zaporizhia, Ukraine - 10:15 pm local time
I've spent thousands of hours building exactly that: React Native + Expo iOS/Android clients, Node and NestJS services, Python where the pipeline or AI piece belongs on the server, PostgreSQL / MongoDB / GraphQL data layers. Repeat clients, hire-again rate around 85%.
The work has spanned SaaS (including a Product Hunt Product of the Year workspace product), mobile at real scale (fitness and audio platforms with very large user bases), banking and healthcare-style flows, marketplaces, and open source. Production AI shipped where it earned its keep: video transcription, segmentation, async processing.
What I deliver:
- React Native + Expo mobile apps, iOS and Android, App Store and Play Store ready
- Full-stack ownership: React frontend, Node and NestJS backend, TypeScript end-to-end
- Python services when the AI or data pipeline lives on the server
- Production-ready apps with auth, APIs, testing, and ops
Tech stack: React Native, Expo, React, Next.js, Node.js, NestJS, TypeScript, Python, PostgreSQL, MongoDB, GraphQL.
Senior React Native Developer, React Native Developer, Mobile App Developer, React Developer, Full Stack Developer, iOS Developer, Android Developer, TypeScript Developer, Node.js Developer.
Steps for completing your project
After purchasing the project, send requirements so Alexander can start the project.
Delivery time starts when Alexander receives requirements from you.
Alexander works on your project following the steps below.
Revisions may occur after the delivery date.
Audit and data model
Review current Firebase use (or design fresh). Map Firestore collections, indexes, security rules, and access patterns.
Refactor or harden, then hand off
Either refactor off Firebase to Postgres or Node (if needed), or harden cold-starts, observability, and rules. Hand off with runbook.