The Challenge
Amazon sellers are trapped in an expensive tool ecosystem. Platforms like Helium 10, Jungle Scout, and SellerBoard charge $100+ per month for inventory tracking, product research, and cashflow analytics. For small and mid-size sellers, that's $1,200+ per year eating directly into already-thin margins.
The problem isn't just cost — it's fragmentation. Sellers cobble together multiple tools, each with its own login, its own data format, and its own billing cycle. There's no single source of truth for their business.
The goal: build a unified platform that delivers the same capabilities at a fraction of the cost — making professional seller tools accessible to every Amazon business, not just the ones with big budgets.
The Solution
End-to-end solo build — product design, architecture, development, deployment, monitoring, GTM, and payment integration. No team, no designer, no PM.
Architecture Decisions
- Next.js + React + Tailwind CSS + Lucide for the frontend — server-side rendering for SEO, component-driven architecture with a polished UI that matches enterprise tools, mobile-responsive so sellers can check dashboards from their warehouse floor
- Java + Spring Boot + Spring Security on the backend — enterprise-grade framework for robust API development, Spring Security for authentication and authorization, battle-tested stack that scales reliably under load
- Event-driven architecture with AWS SQS — decoupled async processing for inventory syncs, notification delivery, and background jobs, ensuring the UI stays snappy while heavy operations run in the background
- AWS cloud infrastructure — EC2 with load balancer for auto-scaling, RDS (MySQL) for managed database with automated backups, Amplify for frontend deployment, Redis for caching and session management
- Google OAuth via Supabase — secure authentication with row-level security, eliminating weeks of auth infrastructure work
- Full observability stack — Sentry (error tracking), New Relic (APM), Mixpanel (product analytics), Google Analytics (traffic), and Clarity (session recording) — the same monitoring stack you'd see at a Series B company
What Was Built
- Multi-role dashboards — CEO, Assistant, and Finance roles each get tailored views with real-time data, so teams see exactly what's relevant to their function
- Inventory tracking — stock levels, low-stock alerts, and batch operations connected directly to Amazon data
- Cashflow analysis — income, expenses, and projections with visual breakdowns that replace spreadsheet chaos
- Product management & shortlisting — workflows for evaluating and tracking product opportunities
- 13 integrations across the entire stack:
- Commerce & Data: Amazon SP-API, Keepa (pricing & sales rank data)
- Payments: PayPal
- Auth: Google OAuth via Supabase
- Infrastructure: AWS RDS (MySQL), Redis (caching & sessions), AWS SQS (async processing)
- Communications: Mailgun (transactional email)
- Observability: New Relic (APM), Mixpanel (product analytics), Google Analytics (traffic), Clarity (session recording), Sentry (error tracking)
Pricing Model
$100/year — while competitors charge the same amount per month. This isn't a stripped-down free tier. It's the full platform at a price point that changes the economics of selling on Amazon.
The Impact
- 12x cheaper than competing tools — $100/year vs. $100+/month, saving sellers $1,100+ annually
- 6-week MVP from zero to functional product, solo-built
- 13 integrations shipping at launch — not a roadmap promise, working connections
- $100/month infrastructure running the full SaaS — optimized architecture keeps costs low enough to sustain the aggressive pricing
- 10 users in first month with organic acquisition — no paid marketing, no sales team
- Full production monitoring — error tracking, user analytics, session recording, and event tracking from day one
This isn't a side project or a proof of concept. It's a live, paying SaaS product with real users, built and operated entirely by one person — demonstrating the kind of end-to-end ownership that Plenvo brings to every engagement.
Testimonial
Testimonial pending — product launched recently. Check back for early user feedback.