Full Stack Developer(React + Node.js/Express)

Job Description

Title: Full\-Stack Engineer (React \+ Node.js/Express) — Multi\-Tenant B2B SaaS

Category: Software Development / Full\-Stack Web Engineering (Contract / Project\-Based)

Experience Level: 3 years on production React \+ Node.js and prior experience on a multi\-tenant or RBAC\-heavy B2B platform.

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Overview

We are building a multi\-tenant B2B SaaS platform used by organizations to manage operational records, documents, workflows, and reporting across many entities and locations. The product spans a broad feature set — authentication (SSO/MFA), tiered role\-based access control and tenancy isolation, record lifecycle management, a multi\-stage document/proposal builder with branded PDF output and spreadsheet import/export, scheduled background jobs, dashboards and data visualization, audit trails with GDPR controls, and AI\-assisted scoring and anomaly detection.

The codebase is an npm\-workspaces monorepo: an Express 5 \+ Sequelize \+ PostgreSQL backend (JavaScript / CommonJS) with strict routes → controllers → services → repositories → models layering, and a React 18 \+ Vite \+ TypeScript frontend using TanStack Query, Zustand, react\-hook\-form \+ Zod, Tailwind, and shadcn/ui. We need an engineer who can own features end\-to\-end across this stack, respect an established set of architectural conventions, and ship production\-grade work without regressing existing functionality.

This is a project\-based / contract engagement. You will work within tight conventions (conventional commits, pre\-commit guards, migrations\-only schema changes, no breaking changes to existing flows) and a 2\-second interactive performance budget per screen.

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Skills

React 18

TypeScript

Node.js

Express 5

PostgreSQL

Sequelize (ORM \+ migrations)

TanStack Query (React Query)

Zustand

react\-hook\-form \+ Zod

Tailwind CSS

shadcn/ui \+ Radix UI

Vite

REST API design

Multi\-tenant RBAC / permissions architecture

JWT authentication

SAML / SSO

MFA / TOTP

S3\-compatible object storage (AWS S3 / R2 / MinIO, presigned uploads)

Server\-side PDF generation

XLSX / spreadsheet generation

Scheduled background jobs (cron)

LLM / OpenAI API integration

Recharts (data visualization)

Maps integration

Docker / Docker Compose

Git \+ Conventional Commits

Jest (backend testing)

ESLint / type\-check discipline

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Responsibilities

\- Build and maintain full\-stack features end\-to\-end across the Express API and React frontend, following the strict layered architecture (routes → controllers → services → repositories → models).

\- Implement multi\-tenant, scope\-aware features that respect a tiered RBAC model and per\-record access\-scope filtering on every read.

\- Write database migrations (numbered, reversible up/down) for all schema changes — no schema sync, no raw SQL in controllers.

\- Develop frontend screens using TanStack Query for server state, Zustand for client state, react\-hook\-form \+ Zod for forms, and Tailwind \+ shadcn/ui for UI; meet the 2\-second interactive budget with skeletons and optimistic updates.

\- Extend multi\-stage document/workflow features (builder UI, server\-side PDF, spreadsheet exchange, e\-sign, open tracking) while preserving availability guarantees.

\- Integrate and maintain external providers behind existing abstractions: LLM/AI, transactional email, object storage, SSO.

\- Implement and maintain scheduled background jobs (lifecycle tasks, scoring, digests, anomaly detection).

\- Use shared primitives (standard API response/error wrappers, async handlers, validators, shared HTTP client, query\-key factory) and reuse existing components/hooks before creating new ones.

\- Write service\-level and cross\-cutting tests; keep lint and type\-check clean.

\- Keep documentation in sync (changelog, pattern/skill files, module docs) and follow the conventional\-commit \+ pre\-commit\-guard workflow.

\- Smoke\-test affected flows before and after every change; never break an existing feature.

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Must\-Have Skills

\- 3\+ years production React 18 \+ TypeScript (hooks, code\-splitting/lazy routes, performance tuning).

\- 3\+ years production Node.js \+ Express building REST APIs.

\- Strong PostgreSQL \+ Sequelize (or comparable ORM) experience, including writing and reversing migrations.

\- Proven work on multi\-tenant SaaS and/or RBAC / permission systems with record\-level scoping.

\- TanStack Query (or equivalent server\-state lib) and a modern form stack (react\-hook\-form \+ Zod or similar schema validation).

\- Tailwind CSS and a component system (shadcn/ui / Radix, or comparable).

\- JWT authentication and secure session handling.

\- Comfort working in a disciplined, convention\-heavy codebase (layered architecture, conventional commits, lint/type\-check gates, no shortcuts).

\- Git proficiency and ability to ship cohesive, well\-scoped commits.

\- Docker / Docker Compose for local stacks.

\- S3\-compatible storage with presigned\-upload flows.

Preferred Skills

\- SSO/SAML, MFA/TOTP.

\- Server\-side PDF and XLSX / spreadsheet generation.

\- OpenAI / LLM API integration in production.

\- Data\-viz with Recharts and maps integration.

\- cron / scheduled background jobs.

\- Jest testing; Zustand state management.

\- GDPR / audit\-trail implementation experience.

Pay: From ₹35,000\.00 per month

Benefits

• Work from home

Work Location: Remote