Senior Backend Engineer

Responsibilities

• Design and build scalable backend services, APIs, and shared platform components
• Own system architecture, performance, and reliability for core backend systems
• Partner with product and ML teams to support data- and model-driven workflows
• Improve observability, monitoring, and operational best practices
• Drive technical decisions and contribute to long-term platform strategy
• Raise the quality bar through code reviews, design discussions, and mentorship

Requirements

• 5+ years of experience building and operating backend systems in production
• Strong experience with APIs, databases, and distributed systems
• Proficiency in at least one backend language and modern backend frameworks
• Experience designing systems for scale, performance, and reliability
• Strong ownership mindset and ability to work in fast-moving environments
• Clear communicator who collaborates well across functions

Benefits

• Competitive salary range of $150K - $235K
• Equity offers included

About the Company

Phia is building the AI alignment layer for commerce. Having raised $43M from Notable Capital, Khosla Ventures, and Kleiner Perkins, Phia's consumer shopping agent has already surpassed one million users and partnered with over 6,200 retail brands. We are a lean, high-ownership team reinventing the shopping experience through intelligent, intent-based AI agents.