Full Stack Developer (Junior)

About this role

About the Role

Lab3 is looking for a sharp, adaptable Full-Stack Developer who thrives in fast-moving environments and knows how to ship features without cutting corners. You'll work across our stack — React, Vite, Node.js, and Firebase/Firestore — building and iterating on products that matter. This isn't a role where you sit back and wait for specs. You'll need strong judgment, the ability to context-switch between priorities, and the discipline to document what needs improving even when the current sprint demands speed. You understand that clean database structures, secure-by-default practices, and well-organized code aren't nice-to-haves — they're the foundation.

You're comfortable working with AI-assisted development tools and LLM APIs, and you bring a builder's mindset to everything you touch.

This is a full-time position with working hours of 9:00 AM – 5:00 PM EST, Monday through Friday. We follow the USA holiday calendar with a few exceptions for Bangladesh holidays. Consistent availability during these hours is non-negotiable.

Excellent written and spoken English is a firm requirement. Our team communicates constantly through written documentation, calls, and async updates. Candidates who do not demonstrate strong English proficiency will not be considered.

Requirements

• Full-stack: React, Vite, Node.js, Firestore, Firebase (Auth, Functions, Storage, Hosting)
• AI coding tools: Cursor, Claude Code, OpenCode, Aider, Cline, Kilo, Copilot, Windsurf, Augment
• LLM APIs: OpenRouter, OpenAI, Anthropic, Gemini; production routing
• Database design: data modeling, efficient queries, scalable Firestore
• Security: HIPAA, encryption, access control, audit logs, secure APIs
• Fast learner; strong problem-solving
• Pragmatic shipping; manage tech debt
• Refactoring focus; maintainable code
• Strong context switching
• Clear written and verbal English
• Availability: 9–5 EST, Mon–Fri, US holidays

Benefits

• Company-sponsored Apple equipment: Mac...