Senior Full-Stack Engineer (React / Node.js / TypeScript / AWS)

We are hiring for one of our clients
Senior Full-Stack Engineer (React / Node.js / TypeScript / AWS)
About the job
Location: Kolkata (Work From Office, 5 days a week)
Experience: 6-10 years
Reports to: Chief Technology Officer (CTO)
Own an entire restaurant-analytics platform end-to-end — ship a database migration, a backend
service, and a polished mobile screen in the same day.Our client — a fast-growing
restaurant-analytics and consulting startup in Kolkata, founded by leaders from top e-commerce
companies and premier institutes — is hiring a founding-calibre Senior Full-Stack Engineer. This
is not a ticket-taker role that owns one layer and shrugs at the rest. You'll hold the whole platform
in your head and be trusted with the entire product.
About the Role
You will own the product end-to-end: a multi-service Node / Express + Sequelize
backend on PostgreSQL, a Vite + React + TypeScript frontend (a Framework7 mobile-first
customer app plus an admin console, packaged with Capacitor), a Gmail-OAuth data-ingestion
pipeline that turns raw platform statements into a reconciled financial "gold" layer, authentication
via Keycloak, and the billing, reporting, and notification subsystems on top. You'll design
schemas, write the queries, build the APIs, craft the UI, wire the deploys, and reason about the
finance logic that makes the numbers correct to the rupee. You are expected to make
architectural calls, not just implement them.
The AI-Augmented Edge Here, AI is your primary workforce. You'll use Claude Code, Cursor,
and Gemini to scaffold services, write and refactor across the stack, generate tests, and reason
about tricky data and finance logic — targeting a 3x-5x efficiency gain. You'll practise Cross-LLM
Validation: one model writes, another reviews for correctness and edge cases. Your value is
measured by working, correct, shipped product — features that reconcile, screens that delight,
deploys that hold — not lines or tickets.
What You'll Do
Backend & Data: Design and build Node / Express services (customer, admin,
user-center, ingestion, aggregation) with clean boundaries. Own the schema, migrations,
and queries (Sequelize + raw SQL) across a 20+ table financial data model, from bronze
ingest to gold aggregates.
Correctness to the Rupee: Implement and defend the finance logic — payouts,
reconciliation, ad-spend, taxes — where "almost right" is wrong; verify against source
data every time.
Jobs, Caching & Integrations: Build background processing (BullMQ / Redis), report
generation (Puppeteer / exceljs), and third-party integrations (Razorpay billing, WhatsApp
/ Meta, Keycloak).
Frontend & Mobile: Build the customer app (Framework7, mobile-first, React Query,
local-first Dexie) and the admin console with clean, reusable, strongly-typed components;
package and ship via Capacitor with real-device polish, responsive layout, and offline
behaviour.
Dashboards & Reports: Turn dense financial data into fast, legible dashboards, filters,
and downloadable reports customers trust.
Data Pipeline: Extend the Gmail-OAuth pipeline that fetches, parses, and normalises
Zomato / Swiggy statements (drift-tolerant, config-driven parsing). Own the aggregators
that roll raw orders into reconciled daily / weekly / monthly metrics — accurate,
idempotent, re-runnable.
Delivery & Quality: Ship features from schema to deploy using a git-based deploy flow;
write meaningful tests (Vitest / Jest / node:test) and verify real output on real data; chase
bugs to root cause across the full stack.
Ownership & Leadership: Make and defend architectural decisions; set code, review, and
documentation standards; mentor other engineers; and translate product and finance
requirements into correct, shippable software with leadership.
Must-Have
6-10 years shipping production web / mobile products end-to-end, owning both backend
and frontend.
Deep Node.js / Express (or similar), REST API design, auth, and service architecture.
Strong PostgreSQL — relational modelling, migrations, and non-trivial SQL (comfortable
in the database, not just an ORM).
Production React + TypeScript, state / data management (React Query or similar), and
component architecture.
Experience with data / finance / analytics-heavy products where accuracy and
reconciliation matter.
A track record of taking features from design through deploy — and making architectural
decisions solo.
Should-Have
Mobile / cross-platform delivery: Framework7, Capacitor, React Native, Flutter, or
equivalent.
Data pipelines: ingestion / ETL, background jobs (BullMQ / Redis), batch / aggregation
logic.
AWS deployment (EC2 / RDS / S3), git-based deploy flows, and basic ops.
Integrations: OAuth (Gmail / Google), payments (Razorpay / Stripe), messaging
(WhatsApp / Meta), and auth systems (Keycloak).
Comfortable in Agile / Scrum and close collaboration with product and leadership.
Good-to-Have
Degree from a premier institute (IITs / NITs / BITS / IIITs) is a plus — strong shipped work
matters more.
AI-augmented development using Claude Code, Cursor, Gemini as a core part of how
you build.
Exposure to LLM-backed features (text-to-SQL analytics, LangGraph / agents).
Domain experience in fintech, restaurant-tech, marketplace, or analytics products — or
other startups where you wore many hats.

Work arrangement
No