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Principal Backend Developer

ExtuitiveCambridge, MA USA
On-site Full-time $152K/yr - $209K/yr

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Experience Level

Senior

Qualifications

PROFESSIONAL EXPERIENCE & QUALIFICATIONS 8+ years of backend engineering experience. Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience. Strong expertise in backend programming languages and frameworks (Node.js/TypeScript, Go, Python, or similar). Experience in designing scalable distributed systems, microservices, and event-driven architectures. Deep familiarity with third-party integrations, REST/GraphQL APIs, webhooks, and rate-limited services. Proficiency in SQL/NoSQL databases, data pipelines, and performance optimization.

About the job

COMPANY DESCRIPTION

Extuitive, a pioneering startup backed by Flagship Pioneering, is redefining product innovation for the AI age. Our mission is to equip entrepreneurs and direct-to-consumer (D2C) brands with AI-powered tools that streamline, expedite, and enhance the launch of new products. Situated in Cambridge, MA, we function like a specialized operations team—agile, data-informed, and unwaveringly committed to making a significant impact.

THE ROLE

As a Principal Backend Developer, you will serve as a technical leader, responsible for the architecture, development, and scalability of the core backend systems that drive our platform. You will spearhead the design of high-throughput services, resilient data pipelines, and ensure seamless integration with essential third-party providers. Collaborating closely with product managers, designers, and engineering leadership, you will translate intricate requirements into robust, sophisticated systems that foster rapid growth. Additionally, you will mentor engineers, shape long-term technical strategies, and evolve our platform architecture to ensure security and reliability as we expand.

KEY RESPONSIBILITIES

  • Own Core Backend Systems – Design, implement, and manage scalable services, APIs, and platform infrastructure while ensuring reliability, observability, and maintainability.
  • Drive Large-Scale Data Pipelines – Architect and operate high-volume, resilient data pipelines for ingestion, transformation, and analytics.
  • Lead Third-Party Integrations – Build and maintain integrations with external vendors, ensuring reliability, observability, and long-term maintainability.
  • Influence Architecture & Best Practices – Shape backend architecture, coding standards, testing frameworks, CI/CD pipelines, and operational excellence.
  • Mentor & Lead Engineers – Provide guidance on system design, debugging at scale, and engineering practices.
  • Wear Multiple Hats – Assist with DevOps, troubleshooting, or other platform needs as required.

About Extuitive

Extuitive is at the forefront of product innovation, leveraging AI to empower entrepreneurs and D2C brands. We are a fast-paced, data-driven company that values impact and agility, dedicated to transforming how products are launched.

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