Junior Backend Developer

Description

Job Summary: We are seeking a Senior Backend Developer to build the core logic of a SaaS product, payment integrations, and AI-powered intelligent workflows. Key Highlights: 1. Work with serverless architecture and optimize Firestore 2. Opportunity to work with modern technologies (Serverless + AI) 3. Open, collaborative culture focused on growth We are looking for a **Senior Backend Developer** with solid experience in **Firebase**, **Cloud Functions**, and consuming **Artificial Intelligence (Google Gemini)** APIs. You will build the core logic of a SaaS product, payment integrations, secure endpoints, and AI-powered intelligent workflows. If you enjoy working with serverless architecture, optimizing Firestore, creating robust security rules, and solving complex challenges, this position is for you. Responsibilities: * Design and develop serverless functions (Node.js / TypeScript) on Firebase. * Model efficient and scalable data structures in Firestore. * Create and maintain advanced security rules. * Implement integrations with **Stripe** or **MercadoPago** (subscriptions, webhooks, billing). * Consume **Google Gemini / Vertex AI** APIs for intelligent features. * Create and document secure REST endpoints. * Collaborate with frontend and product teams to define technical solutions. * Participate in architecture decisions oriented toward performance and cost-efficiency. Requirements: * Backend development experience. * Proficiency in Firebase (Cloud Functions, Firestore, Security Rules). * Strong expertise in Node.js / TypeScript. * Experience with AI APIs (Google Gemini, OpenAI, etc.). * Payment gateway integration: Stripe or MercadoPago. * Experience building SaaS systems (roles, plans, subscriptions). * Good practices in version control, security, and documentation. We Offer: * Competitive salary based on experience. * Flexible working hours. * Opportunity to work with modern technologies (Serverless \+ AI). * Open, collaborative culture focused on growth. * Professional development and participation in product decisions. If you are interested, please apply through this channel and we will contact you shortly. Position Type: Full-time, Indefinite-term Salary: $14,000\.00 \- $16,000\.00 per month Work Location: On-site employment