Full Stack Developer — Backend Heavy
Koonei
Job Description & Responsibilities
Full Stack Developer — Backend Heavy
What we need: A Backend-Heavy Full Stack Developer for a large-scale enterprise Software platform. Core focus: APIs, business logic, integrations. But comfortable stepping into frontend when the team needs it.
To Apply: https://forms.gle/fzANhU4twANdfokp6
Key responsibilities
- Build RESTful APIs using Node.js / NestJS / TypeScript
- Design and optimize PostgreSQL schemas using Prisma ORM
- Implement complex workflows, state machines, and approval flows
- Integrate payment gateways, messaging APIs, and external services
- Build background jobs with Redis + BullMQ
- When needed: build pages/components using React / Next.js
- Write tests, participate in code reviews and daily standups
Profile we're looking for
- 3+ years experience, strong backend focus
- Strong: Node.js, NestJS, PostgreSQL, Prisma, TypeScript, Redis
- Comfortable with React / Next.js — can build admin pages, forms, tables independently
- Third-party API integration and webhook handling experience
- Database transactions and data integrity understanding
- Unit testing with Jest
- Believes in continuous learning — stays curious, picks up new tools fast, sees challenges as growth
Nice-to-have (big plus): React Native, payment integrations (Stripe/HiPay), Twilio, AWS (SES/S3/Lambda), Firebase, Docker, multi-tenant SaaS, ERP/CRM experience.
Goal of the role: Be the backbone — own APIs, business logic, and integrations end-to-end. Step into frontend when it counts. Backend specialist first, truly full stack when needed.
Budget: 1 Lakh INR/month
Location: Kolkata, India (hybrid)
Hours: Full-time
To Apply: https://forms.gle/fzANhU4twANdfokp6
About Koonei
Required Skills
Job Details
Posted by
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Posted on:
4 Jul 2026
About Koonei
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