Senior Full Stack Developer (Node.js / NestJS / Next.js / AI)

Company: CodeQuery (Querycode Techno Private Limited)
Location: Patna, Bihar (with projects spanning our Perth, Australia operations)
Experience: 2-5+ years (skill matters more than years)
Employment Type: Full-time

About the Role

CodeQuery builds full-stack white-label SaaS platforms for home and field service businesses (the SerQ platform), alongside custom software, digital marketing, and agency services for clients across India and Australia.

We're looking for a Senior Full Stack Developer who can independently design, build, and ship production-grade systems—and who's excited to help us push our backend stack from Express toward NestJS as we scale SerQ's multi-tenant, white-label architecture. You'll own features end-to-end, from architecture through deployment, without needing every ticket fully spec'd out for you.

What You'll Build
- Multi-tenant, white-label SaaS modules for the SerQ platform
- AI-powered tools and internal automation
- REST APIs and backend services migrating to NestJS




- Client-facing platforms across home services, healthcare, salon/spa, and field service verticals
- Payment, maps, and messaging integrations
- Production deployment pipelines

Core Requirements

JavaScript & TypeScript
- Robust grasp of JavaScript fundamentals: closures, async/await, the event loop, prototypes—enough to debug real production issues
- TypeScript fluency is required (not optional). NestJS only pays off if you actually think in types.

Backend - NestJS First

We're standardizing new services on NestJS. If you haven't used it before but have strong OOP/dependency injection instincts (e.g., from Spring or Angular), we'll consider you and expect a fast ramp-up.
- NestJS: modules, providers, dependency injection, guards, interceptors, pipes
- Solid understanding of OOP, SOLID principles, Clean Architecture, Repository Pattern
- REST API design, JWT/OAuth, middleware, queues, cron jobs
- Comfortable

📌 Senior Full Stack Developer (Patna)
🏢 Codequery
📍 Patna