Full Stack Developer
Actively Reviewing the Applications3sigma crm
India
On-site
Posted 1 day ago
•
Apply by June 13, 2026
Job Description
This role is mostly about working on an existing, live production product used by real customers daily.
You will:
- Improve existing features
- Build new features on top of current architecture
- Fix production issues
- Optimize performance and stability
- Work inside a structured but fast-moving codebase
This is not greenfield development.
What You Will Do
- Work on existing Node.js backend services
- Build and enhance React Native mobile app features (Primary Work)
- Add new modules inside current architecture
- Fix bugs and production issues quickly
- Improve performance, sync reliability, and app stability
- Work on integrations (APIs, messaging, third-party services)
- Understand legacy decisions and improve them safely
Tech Stack
- Node.js
- TypeScript
- React Native (Primary)
- MongoDB
- Redis (Plus)
- AWS / Cloud (Plus)
Reality Of The Role
- Large part of work is improving and extending existing systems
- Need to read and understand current code before building new features
- Balance between speed and stability is critical
- Production safety matters — real users depend on it
Must Have
- Strong Node.js experience
- Strong React Native hands-on development
- TypeScript working knowledge
- Experience working on live production apps
- Comfortable working inside existing codebases
- Debugging skills (logs, production issue tracing, root cause)
Good To Have
- SaaS / CRM product experience
- Experience maintaining legacy or mid-stage product code
- Performance optimization experience
- Mobile app release cycle understanding
Who Will Do Well
- Developers who can read existing code fast
- People who like improving systems, not just building new ones
- People who can ship safely without breaking production
- Engineers who think product impact, not just tickets
Basic Qualification
- 2–4 years real product development experience
- Must have worked on at least one live production app
Job Type: Full-time
Pay: ₹13,961.29 - ₹40,000.00 per month
Experience:
- nodejs: 2 years (Required)
- React Native: 2 years (Required)
Work Location: Remote
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