Staff Backend Engineer (Node.js / TypeScript)

Staff Backend Engineer (Node.js / TypeScript) Join a fast-growing SF tech team: own scalable Node.js/TypeScript backend, steer architecture for a massive marketplace, and influence the platform’s future — hybrid work, equity. Location: San Francisco, CA (Hybrid - 3 days onsite) Compensation: $200,000 - $240,000 + Equity + Benefits About the Opportunity We're partnering with a well-funded, high-growth technology company that is redefining the digital marketplace experience within a rapidly expanding consumer industry. Backed by leading venture capital firms and experiencing significant growth, the company is building highly scalable systems that process billions of transactions each month while expanding into new product categories. This is an opportunity to join a collaborative engineering team where you'll own large-scale backend architecture, influence technical direction, and help shape the next generation of a platform used by millions of customers. What You'll Do Design and build highly scalable backend services using Node.js and TypeScript. Lead the evolution of container-based infrastructure running on AWS EKS (Kubernetes). Drive monolith-to-microservices migration initiatives while maintaining production stability. Architect backend systems supporting high-volume consumer transactions and marketplace functionality. Collaborate closely with Product, Frontend, DevOps, and Infrastructure teams on end-to-end feature delivery. Improve platform scalability, reliability, observability, and system performance. Build new backend services supporting expansion into additional marketplace categories. Utilize modern AI-assisted development tools and internal engineering workflows to improve development efficiency. Mentor engineers and contribute to technical strategy and architectural decisions. Required Qualifications 8+ years of backend software engineering experience. Strong professional experience with Node.js, TypeScript, and PostgreSQL. Experience designing and operating large-scale distributed systems. Hands-on experience with AWS cloud services and Kubernetes/EKS. Experience migrating or building microservices within containerized environments. Background building consumer-facing products, online marketplaces, eCommerce platforms, gaming platforms, or other high-traffic transactional systems. Strong system design skills with experience leading architecture decisions. Comfortable working in fast-paced startup or growth-stage environments with significant ownership. Experience using AI-assisted coding tools such as Cursor, Claude, GitHub Copilot, or similar technologies as part of the development workflow. Excellent communication and cross-functional collaboration skills. Preferred Experience Marketplace or eCommerce platform experience. Redis, Docker, Terraform, BullMQ, Datadog, Sentry, LaunchDarkly, or Stripe. Experience scaling platforms processing millions or billions of transactions. Experience mentoring engineers or leading technical initiatives. Why Join? Competitive salary plus meaningful equity. Join a rapidly growing company building a category-defining consumer platform. Work on technically challenging distributed systems at massive scale. Significant ownership and influence over engineering direction. Modern engineering culture focused on innovation, automation, and AI-assisted development. Hybrid work environment in San Francisco with a collaborative engineering team. About Sperton Sperton is a global recruitment and consulting firm with offices across Europe, Asia, and the Americas. We help companies find and manage top talent across borders, delivering fast, compliant, and flexible recruitment, consultant hiring, and global mobility services. Locations United States Remote status Hybrid Job location San Francisco, CA Workplace & Culture at Sperton At Sperton, we believe that great results come from great people. Our culture is built on trust, collaboration, and a shared passion for delivering quality in everything we do. We are a Norwegian-owned international company with colleagues across Europe, Asia, and the USA , working together seamlessly across time zones and cultures. Our teams are diverse, yet united by the same goal — to connect people and companies in meaningful ways. We value openness, initiative, and continuous learning. Everyone at Sperton is encouraged to take ownership, share ideas, and challenge existing ways of working to make our solutions even better. Even though we operate globally, our approach is personal. We take pride in creating a supportive and inclusive environment where people feel heard, respected, and motivated to grow — both professionally and personally.