Full Stack Software Engineer

Company Description

We are looking for a talented Full Stack Software Engineer to join our engineering team at ZeinCrew. In this role, you will be working directly with fast-growing startups in New York and Tokyo. This is a great opportunity for engineers passionate about solving real-world problems and creating high-quality, scalable software.

Full-Stack Development

• Build and maintain frontend applications using React.js and modern UI frameworks
• Develop backend services and APIs using Node.js / Express.js
• Design and manage PostgreSQL database schemas and implement optimized queries
• Implement real-time features using webhooks and Redis caching
• Build secure authentication and authorization using OAuth, JWT, and industry best practices

AI-Driven Development

• Integrate and optimize LLM-based features for natural language understanding
• Develop audio processing pipelines for transcription and meeting intelligence
• Implement vector search and semantic retrieval capabilities
• Contribute to intelligent systems for generating client insights, summaries, and action items

Enterprise Integration

• Build integrations with leading CRM platforms, email systems, and calendars
• Develop scheduling, payment, and workflow management features
• Apply strong security, privacy, and compliance practices across the system

Technical Skills

• 1+ years building production applications with React.js and JavaScript/ES6+
• 1+ years backend experience with Node.js, Express.js, REST APIs
• Hands-on experience with SQL databases (PostgreSQL preferred)
• Familiarity with LLM APIs, vector databases, or AI-powered product features
• Experience with Azure, Redis, and cloud-native environments
• Authentication and identity management experience (OAuth2, JWT)

Professional Experience

• Bachelor’s degree in Computer Science, Software Engineering, or equivalent experience
• Strong understanding of scalable architecture, CI/CD, and secure API design
• Experience working in an agile or startup environment is a plus

• Work with top-tier global companies and rapidly scaling startups
• Competitive compensation packages
• Career growth, mentorship, and access to advanced technologies
• A supportive engineering culture with a focus on excellence and teamwork