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Backend Developer
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IT / Hospitality Technology
Fullerton, CA (In Person)
Full-Time
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Job Description
Backend Developer IT / Hospitality Technology - 4.0 Fullerton, CA Job Details Full-time $45,000 - $53,000 a year 1 day ago Qualifications Git Event-driven architecture Data caching Developing and maintaining backend systems In-memory caching TypeScript Full Job Description ■
Position Title :
Backend Developer ■General Responsibilities :
- Design and develop scalable RESTful APIs using NestJS 9.4.0 and TypeScript
- Build and optimize real-time communication systems using MQTT (AWS IoT Core), WebSocket, and Server-Sent Events (SSE)
- Work with PostgreSQL databases implementing read/write separation strategies
- Implement caching strategies using Redis 7.1.0 (ioredis)
- Develop asynchronous processing workflows with BullMQ
- Migrate and optimize infrastructure from EC2 to ECR/ECS containerized deployments
- Collaborate with Android and web teams to deliver seamless integration
- Monitor system health using Grafana, CloudWatch, and OpenTelemetry
- Contribute to architectural decisions for our 2026 roadmap
- Participate in on-call rotation for production support ■ Required Qualifications
- 1-4 years of professional backend development experience
- Strong proficiency in Node.js and TypeScript
- Experience with NestJS or similar backend frameworks (Express, Fastify)
- Solid understanding of RESTful API design and development
- Hands-on experience with PostgreSQL or other relational databases
- Familiarity with Redis or similar caching systems
- Knowledge of Git and collaborative development workflows
- Understanding of asynchronous programming and event-driven architectures
- Strong problem-solving abilities and debugging skills
- Excellent communication and teamwork capabilities ■ Preferred Qualifications
- Experience with AWS services (EC2, S3, CodeDeploy, IoT Core, ECS/ECR)
- Knowledge of real-time protocols: MQTT, WebSocket, Server-Sent Events
- Experience with message queues (BullMQ, RabbitMQ, SQS)
- Familiarity with Docker and container orchestration
- Understanding of microservices architecture and monorepo management (Turborepo)
- Experience with monitoring tools: Grafana, CloudWatch, OpenTelemetry
- Knowledge of database optimization and query performance tuning
- Background in high-traffic, real-time applications (restaurant tech, hospitality, e-commerce)
- Experience with React Query or understanding of frontend-backend integration ■ What we offer
- Work on cutting-edge real-time systems at scale (100+ restaurants, 1,800+ devices)
- Hands-on experience with AWS infrastructure modernization (EC2 → ECS/ECR)
- Exposure to diverse technologies: MQTT, WebSocket, SSE, message queues
- Collaborative engineering culture with opportunities to influence technical direction
- Competitive compensation and comprehensive benefits
- Professional development and learning opportunities