Backend Developer (NestJS, PostgreSQL, MQTT) - Full-Time
About the Role Ameza is building a smart retail platform combining POS systems with IoT-enabled devices. We’re hiring a backend engineer who understands NestJS, PostgreSQL, MQTT, and event-driven IoT pipelines. This is a full-time 160 hrs/month role with potential equity options for long-term contributors. Mandatory Requirements (Read Before Applying) Applications without these will be automatically rejected. • You must have proven NestJS + PostgreSQL experience (GitHub required). • You must have real-world MQTT/IoT backend experience, not tutorial-level. • You must provide links to projects or code samples that demonstrate the backend architecture you built. • You must confirm you can work for ~$2,000/month full-time. • You must sign an NDA + NCA before any technical discussion. • No agencies, no teams, no subcontractors, no recruiters. • No AI-generated applications. We will detect them. If you cannot meet ALL of these, do not apply. Responsibilities • Build and maintain NestJS backend modules, services, guards, and APIs • Design multi-tenant PostgreSQL schemas • Implement Timeseries tables (Timescale) • Develop MQTT ingestion pipelines (batching, retention, validation) • Implement RBAC, ABAC, JWT auth, and secure tenant isolation • Build image upload APIs (S3/Spaces) • Deploy backend using Docker + GitHub Actions to DigitalOcean • Maintain documentation and clean, maintainable code Required Skills • Strong experience with NestJS, TypeScript, PostgreSQL • Experience with MQTT in production environments • Understanding of multi-tenant SaaS and event-driven systems • Docker, CI/CD (GitHub Actions), DigitalOcean deployment • Ability to work independently (no hand-holding) • Clear English communication Nice To Have • Timeseries DB (Timescale/Influx) • Redis / BullMQ • Image pipelines (sharp, presigned URLs) • Offline-first or POS sync patterns Compensation • Up to $2,000/month full-time (160 hrs) • Equity options for high-performing long-term contributors How to Apply (Failure to Follow = Automatic Rejection) Include ALL of the following in your message: • GitHub link with NestJS backend examples • Short description of an IoT/MQTT system you built • Your monthly availability and timezone • Confirmation you accept NDA + NCA • A 3–5 sentence description of how you would build an MQTT → PostgreSQL ingestion pipeline If any of these are missing, the application will not be reviewed. Pay: $1,500.00 - $2,000.00 per month Application Question(s): • How many years of experience do you have with PostgreSQL (schema, indexing, migrations) • Please provide your GitHub link showing NestJS or backend work • Have you directly integrated MQTT (not WebSockets, not Kafka) into a production backend system? • Are you willing to work full-time (160 hrs/month) for $2,000/month? • Are you willing to sign a Non-Disclosure Agreement and Non-Compete Agreement before access? • Are you applying as an independent developer (not an agency, team, or recruiter)? • How many years of professional experience do you have using NestJS (not Node.js)? Work Location: Remote Apply tot his job