node.js developer

Ruby Labs is a tech company that creates and operates innovative consumer products across the health, education, and entertainment industries.

• 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, system design, and backend best practices;
• 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.

• 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, including tracing, logging, and alerting;
• High standards for code quality, reliability, and communication;
• 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;
• Nice to have: Experience working in startup environments or small, high-autonomy engineering teams, passion for building and improving infrastructure, developer experience, and observability.

• Remote work environment;
• Unlimited PTO;
• Paid national holidays;
• Company-provided MacBook;
• Flexible independent contractor agreement.