Hi there! Just to put it up front: this role is looking for high level back end software engineers who have direct experience leading scalability and infrastructure projects on teams of 5-15 people while still being a hands on developer. It is located in Cambridge, and the role is fully in-office. Thanks for applying! This employer is a 50 person AI-driven startup building a modern CRM platform that helps businesses better manage, activate, and leverage their customer data. By combining automation, intelligent insights, and scalable infrastructure, the organization is redefining how teams engage with customers and make data-driven decisions. They are actively hiring Senior and Staff Software Engineers to help build out their Boston engineering office, focusing on highly scalable backend systems and cloud-native applications using TypeScript, Node.js, React, and AWS. This is an opportunity to join a high-growth engineering team tackling complex distributed systems and large-scale data challenges. Ideal candidates will bring experience building mission-critical backend services at scale, leading engineering initiatives, and mentoring teams. Engineers coming from product-focused technology companies or startups solving difficult systems, infrastructure, analytics, or scalability problems will find significant ownership, impact, and growth opportunities in this role. Required Skills & Experience Significant experience working on scalability and performance projects, P99 latency, etc. Demonstrated track record leading software projects with teams of 5-6 engineers, driving technical execution and cross-functional collaboration Background working on teams that own online databases, platform infrastructure, or customer-facing backend services Experience working at product-focused technology companies rather than internal IT organizations Desired Skills & Experience Experience with TypeScript, Node.js, and AWS Experience with Kafka, ClickHouse, Flink, Spark, or similar real-time data infrastructure technologies What You Will Be Doing Tech Breakdown TypeScript Node.js React AWS Distributed Systems Real-Time Data Infrastructure Cloud-Native Architecture High-Scale Backend Services Daily Responsibilities 40% Designing and building scalable backend services and cloud infrastructure 25% Leading technical projects and coordinating efforts across teams of 5-6 engineers 15% Architecting new product features and platform capabilities 10% Performance tuning, scalability improvements, and system reliability initiatives 10% Mentoring engineers, conducting design reviews, and contributing to technical strategy The Offer Competitive base salary and extremely generous equity package Comprehensive health, dental, and vision coverage Flexible PTO and paid holidays Hybrid Boston office environment Opportunity to influence architecture and technical direction at an early-stage company Strong career growth opportunities into technical leadership and organizational influence #LI-ME1