Back End Developer (Node.js) in London - Arc IT Recruitment

Back End Developer (Node.js)

Senior Software Engineer – Pricing & Inventory (Node/TypeScript)

Contract: 6 months initially

Rate: Up to £420 per day, Outside IR35

Location: Can be worked fully remote

We’re supporting a high-traffic global e-commerce platform in its search for a Senior Software Engineer to improve its pricing, inventory and availability systems.

This is a hands-on role focused on building reliable, scalable services that process millions of customer searches across multiple international markets.

What you’ll be working on

• Building and improving pricing, inventory and availability services
• Developing quote-caching and data freshness strategies
• Designing resilient APIs and third-party integrations
• Reducing latency and improving platform performance
• Balancing pricing accuracy with cache efficiency and infrastructure cost
• Improving monitoring, tracing and production observability
• Owning solutions from investigation through to deployment

Essential experience

• Strong commercial experience with Node.js and TypeScript
• Experience building pricing, inventory or availability systems
• Background in a high-traffic e-commerce, marketplace or travel platform
• Strong understanding of caching, data freshness and cache invalidation
• Experience designing reliable APIs using retries, timeouts, idempotency and backpressure
• Good SQL knowledge
• Experience integrating unreliable or poorly documented third-party APIs
• Strong production ownership across testing, CI/CD, deployment and monitoring
• Regular use of AI coding tools or LLM-based development tools

Nice to have

• C#/.NET or Python
• Cloud platforms and Terraform
• Datadog, distributed tracing, profiling or flame graphs
• Dynamic pricing, edge technologies or travel-sector experience

This role would suit an experienced engineer who is comfortable owning complex pricing and inventory problems in a high-volume transactional environment.