Senior Backend Engineer at Ruby Labs

Ruby Labs

European Union·7h ago

SeniorFull-timeNode.jsAWSRedisGoAI

Salary Range

$132,600 - $179,400 /year

Estimated

This salary is estimated based on similar roles. The actual salary may vary.

About the Role

We are looking for a Senior Backend Engineer to join Ruby Labs and help design, build, and scale the core backend systems for our AI product Use.ai. This is a high-ownership role focused on solving distributed systems challenges and driving both feature delivery and infrastructure excellence.

Key Responsibilities

→Deliver new backend features with a focus on scalability, performance, and reliability
→Maintain, optimize, and improve existing services and infrastructure
→Design, deploy, and operate backend services across AWS, Cloudflare, and other environments
→Implement and evolve monitoring and observability using tools such as Sentry, OpenTelemetry, logging, and alerting
→Investigate and resolve production issues across distributed systems
→Write clean, maintainable code aligned with SOLID principles
→Lead incident investigations, root cause analysis, and system reliability improvements
→Contribute to architectural decisions, documentation, and infrastructure planning
→Collaborate with high standards for communication, ownership, and delivery

Requirements

✓Deep expertise in distributed systems, system design, and backend architecture
✓Strong understanding of database fundamentals, indexing, consistency, replication, transactions, and storage trade-offs
✓Proven ability to design scalable and resilient systems
✓Fluency in Node.js backend development
✓Strong grasp of software engineering principles, including SOLID
✓Experience debugging complex issues in production environments
✓Experience with cloud infrastructure (AWS) and backend service deployment
✓Experience implementing monitoring and observability using tools such as Sentry and OpenTelemetry
✓Deep knowledge of Redis, including caching, pub/sub, queues, replication, persistence, and performance tuning
✓Strong experience with AWS services, including compute, serverless, networking, storage, security, and infrastructure-as-code
✓Experience with Cloudflare Workers, edge routing, caching, and security primitives
✓Familiarity with Sentry performance monitoring and OpenTelemetry instrumentation at scale
✓Comfortable working in timezone ±2 hours from UK time