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Principal Engineer @Fastn

[Hiring] Principal Engineer @Fastn

Mar 20, 2025 - Fastn is hiring a remote Principal Engineer. đź’¸ Salary: market-leading salary and equity. đź“ŤLocation: USA.

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more.

Role Description

As a Principal Engineer, you will play a foundational role in defining and executing Fastn’s technical vision. You will be responsible for architecting, optimizing, and scaling our AI-powered integration infrastructure to handle millions of transactions per second with sub-millisecond latency. You’ll work closely with engineering leaders, product teams, and executives to drive technical strategy, innovation, and engineering excellence.

This role is ideal for someone who is not just a world-class engineer but also a strategic thinker, mentor, and influencer who thrives in a fast-moving, high-growth startup environment.

Your Responsibilities

  • Define and lead the architecture, scalability, and reliability roadmap for Fastn’s core platform.
  • Design and optimize low-latency, high-throughput distributed systems capable of handling millions of transactions per second/minute.
  • Leverage AI/ML to enhance automation, data mapping, and intelligent API connectivity.
  • Drive initiatives to ensure sub-millisecond API response times and seamless scaling.
  • Implement world-class security best practices across API authentication, data privacy, and regulatory compliance (SOC 2, GDPR, etc.).
  • Lead and mentor engineers, fostering a culture of technical excellence, knowledge-sharing, and continuous improvement.
  • Partner with product, engineering, and customer success teams to align business goals with technical execution.
  • While you’ll shape the big-picture strategy, you should also be comfortable writing high-impact code and conducting deep technical reviews.

Qualifications

  • 10+ years of hands-on software engineering experience, with at least 3+ years in a Principal/Architect role in high-scale SaaS, API, or distributed systems.
  • Proven track record of designing, building, and scaling distributed systems handling millions of transactions per second/minute with sub-millisecond latency.
  • Deep expertise in backend development using Java, Python, or Node.js (Fastn’s stack is flexible).
  • Strong understanding of high-performance, low-latency computing, caching strategies, and database optimization.
  • Experience working with cloud platforms (AWS, GCP, Azure) and serverless architectures.
  • Knowledge of event-driven architectures, message queues (Kafka, RabbitMQ, etc.), and real-time data processing pipelines.
  • Expertise in API security, authentication (OAuth, JWT, OpenID), and compliance standards (SOC 2, GDPR, etc.).
  • Experience in leading and mentoring engineering teams, fostering a high-performance, collaborative culture.

Requirements

  • Experience with iPaaS (Integration Platform as a Service) tools like Mulesoft, Workato, or Tray.io.
  • Hands-on experience with AI/ML-driven automation in integrations and API intelligence.
  • Previous work in developer tooling, B2B SaaS integrations, or API marketplaces.

Benefits

  • Shape the Future of SaaS Connectivity
  • Build and lead a game-changing integration infrastructure.
  • Work on Cutting-Edge AI & API Technologies
  • Be at the forefront of AI-powered SaaS integrations.
  • High-Impact, High-Growth Environment
  • Your contributions will directly define Fastn’s trajectory.
  • Strong Engineering Culture
  • Collaborate with world-class engineers solving highly complex challenges.
  • Competitive Compensation
  • Market-leading salary, meaningful equity, and a flexible work environment.

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đź“Ť Be aware of the location restriction for this remote position: USA
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Principal Engineer @Fastn
Software Development
Salary đź’¸ market-leading salary and equity
Remote Location
USA
Job Type full-time
Posted Mar 20, 2025
Apply for this position Unlock 54,799 Remote Jobs
️
đź“Ť Be aware of the location restriction for this remote position: USA
‼ Beware of scams! When applying for jobs, you should NEVER have to pay anything. Learn more.
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