Description We’re looking for exceptional and experienced Senior Backend JavaScript Developers to join our Unblocker team, with deep expertise in Node.js and building production-grade backend services. In this role, you will take end-to-end ownership of product and feature development, building SaaS applications and services in a microservices architecture, using modern technologies in a fast-paced and professional environment. Tech Stack: Node.js, JavaScript, MongoDB, Kubernetes, Redis (including Redis Streams) *Hybrid position based in San Francisco* Responsibilities • End-to-end feature development, from design and implementation to production rollout and ongoing improvements. • Build and operate backend services with a strong focus on scalability, reliability, and performance in a microservices environment. • Participate in system design and architecture planning, and contribute to technical decisions across the team. • Work with asynchronous, message-driven components using Redis Streams, including debugging, tuning, and ensuring resilient processing. • Write high-quality, maintainable code with appropriate test coverage; participate actively in code reviews. • Collaborate effectively with teammates and cross-functional stakeholders to deliver high-impact outcomes. • Continuously learn, adapt, and stay up-to-date with best practices and evolving technologies. Requirements • 5+ years of hands-on software engineering experience, including 3+ years focused on backend JavaScript / Node.js development. • Proven experience building and maintaining SaaS applications and/or production backend services. • Experience working in a microservices architecture (service boundaries, APIs, reliability patterns). • Hands-on experience with MongoDB and Redis (including practical experience with Redis Streams or similar pub/sub/stream processing). • Familiarity with Kubernetes and containerized deployments. • Good understanding of system design fundamentals: APIs, data modeling, performance, scalability, and reliability. • Fast learner, able to work both independently and as a team player. • Strong written and verbal communication skills. Nice to Have: • Experience with AWS and cloud-based production environments. • Experience with observability tooling (logging/metrics/tracing) and incident response. • Experience with scraping, browser automation, Playwright, Puppeteer, or Selenium.