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StartupSoft Logo StartupSoft · IT - Software Development

Senior Full-stack Engineer (React + Node.js, Nest.js)

Ukraine · Job Posted May 03, 2026
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Job Description

The world’s largest B2B recommerce platform that serves as a central system of record for resale. It connects buyers and sellers of returned, trade-in, and excess inventory through online channels, offering buyers direct access to valuable goods and providing sellers with a more efficient, technology-driven alternative to traditional resale methods.

Job Responsibility

  • Build a React + TypeScript application (6th React app in the ecosystem)
  • Reuse shared UI components
  • develop custom modules for Inventory, Listings, Orders, and Settings
  • Implement Segment event tracking
  • Follow the existing SSR architecture pattern
  • Ensure performance, scalability, and clean UX
  • Develop Node.js + TypeScript services
  • Use AlloyDB as the primary database
  • use MongoDB if needed for dynamic schemas
  • Integrate with internal REST services (Account, Location, Listing, Auction, Offering, Order)
  • Build marketplace integrations: eBay Sell APIs / Whatnot APIs
  • Implement event-driven workflows via RabbitMQ (delisting, order sync, webhooks)
  • Deploy to GCP Kubernetes (dev/qa/staging/prod)
  • Use GitLab CI/CD pipelines
  • Monitoring via Google Cloud Monitoring and Prometheus
  • Structured logging to the internal observability stack
  • Replicate data to the warehouse (MVP)
  • Support analytics for sales volume, item pricing, and cross-marketplace performance
  • Future enrichment using retailer catalogs (e.g., Target)

Requirements

  • 5+ years of professional software engineering experience
  • Strong expertise in React + TypeScript
  • Strong expertise in Node.js + TypeScript
  • Strong expertise in REST API design and integration
  • Strong expertise in Event-driven architectures
  • Strong expertise in Nest.js
  • Experience with relational databases (PostgreSQL/AlloyDB)
  • Experience with message brokers (RabbitMQ or similar)
  • Familiarity with Kubernetes-based deployments
  • Experience integrating third-party APIs (marketplaces preferred)
  • Strong understanding of distributed systems and system design

Nice to have

  • Experience with multi-marketplace commerce systems
  • Experience with analytics/data warehousing pipelines
  • Experience with MongoDB for flexible schema use cases
  • Experience with SSR applications at scale
  • Background in e-commerce, resale, or auction platforms

What we offer

  • Global collaboration opportunities
  • Core team membership
  • Equity and ownership potential
  • Premier workspaces
  • Competitive compensation package (above average salary, benefits & medical insurance)
  • Cutting-edge technology environment
  • Impactful project contributions
  • Collaborative company culture
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