Full-Stack Developer (Node/PostgreSQL/React) for Long-Term SaaS Dashboards

We’re building a suite of B2B SaaS tools for Amazon sellers and agencies. This is a long-term position, not a one-off project. You will be our primary developer as we build and maintain multiple dashboards and web applications over the coming years. You need to be comfortable owning a codebase, making technical decisions, and shipping real product – not just small CRUD apps.

The core stack we expect you to use:

– Backend: Node.js (TypeScript preferred) with REST APIs (Express/Fastify). Python (FastAPI) for ETL/background jobs is a strong plus

– Frontend: React (Next.js or SPA), component-based UI, responsive design, light/dark mode basics

– Data: PostgreSQL (preferred) or PostgreSQL + some MongoDB, schema design for multi-tenant SaaS, aggregations, indexing

– Infrastructure: basic AWS / cloud deployment, Docker, Git/GitHub, simple CI/CD

What you’ll actually be doing (first project – Account Health Dashboard):

– Implement backend services that ingest JSON/CSV reports from Cajari (Amazon Seller Central data extraction), normalize them, and store them in a multi-tenant database

– Design and implement database schemas for clients, seller accounts, policy violations, metrics snapshots, and workflow/work history

– Build a secure backend with role-based access (Admin, Staff, Client) and strict tenant isolation on every query

– Expose clean REST APIs for the frontend (metrics, trends, filters, pagination)

– Turn detailed dashboard designs (tables, filters, charts, badges) into reusable React components

– Implement account-health KPIs, trends, and alert logic on the backend and surface them cleanly in the UI

– Handle pagination, filtering, and sorting for large datasets (10k+ rows per account)

– Pay attention to reliability, data validation, and simple but solid error handling throughout the stack

What you’ll do next (this is ongoing work, not just one dashboard):

– Build additional monitoring dashboards for different Amazon / e-commerce data sources

– Develop client-facing reporting tools and self-service portals

– Create internal operations and case-management applications for our team

– Implement automation and workflow tools (alerts, queues, background jobs, scheduled reports)

– Help shape architecture decisions as the product suite grows over time

Requirements:

– 3–5+ years of full-stack experience with Node.js and React (Python experience is a strong plus)

– Very comfortable designing relational schemas and writing clean, efficient SQL queries (PostgreSQL strongly preferred)

– Proven experience building at least one serious dashboard or B2B SaaS product end-to-end (not just tutorials)

– Strong understanding of authentication, authorization, and multi-tenant patterns (tenant_id, RBAC, etc.)

– Ability to read existing HTML/CSS or Figma and refactor it into reusable components instead of starting from scratch every time

– Solid Git/GitHub habits, code reviews, and basic testing (unit/integration)

– Good written English and willingness to communicate clearly in async updates and short Loom walkthroughs when needed

Nice-to-have:

– Prior experience with Amazon Seller Central or other e-commerce dashboards

– Familiarity with queues/background workers and ETL/data pipelines (BullMQ, Celery, cron-based workers, etc.)

– Experience with charting libraries (Recharts, Chart.js, etc.)

– Experience deploying and operating apps on AWS or similar cloud providers

This is NOT a one-off project. We are looking for a long-term partner who can stay with us, own the codebase, and continue building additional dashboards, internal tools, and web applications after the first version ships.

When you apply, please:

– Answer the screening questions carefully

– Include links to 1–2 dashboards or SaaS apps you actually built (GitHub and/or live demos)

– Briefly confirm your weekly availability and your timezone

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