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Senior Software Engineer, Platform and Infra

Flex

Salary not specified
Sep 24, 2025
Remote, US
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Flex is building a finance super app for premium business owners, aiming to reimagine financial workflows and services for entrepreneurs. The company is targeting mid-market businesses overlooked by existing fintech solutions and reliant on outdated regional banks, addressing a significant revenue opportunity.

Requirements

  • Proficiency in NodeJS+Typescript and its ecosystem.
  • An understanding of and interest in architectural patterns for highly available, scalable, low-latency, asynchronous systems
  • Ability to provide in-depth evaluation of multiple technical directions and determine tradeoffs of each.
  • Ability to make data-driven decisions on technical architecture and project prioritization.
  • Exposure to modular monoliths along with the benefits and challenges they bring.
  • Experience with any cloud based provider like Google Cloud, AWS, or Azure.
  • Experience maintaining cloud-based infrastructure as code with tools like Terraform, Pulumi, or Cloudformation.

Responsibilities

  • Ownership over foundational systems shared across a variety of different products.
  • Play a critical role in the development, design, and maintenance of Flex's platform, services, infrastructure, and dev tooling.
  • Own problems end-to-end, thinking through everything from api contracts, data, scalability, security, observability, and metrics.
  • Lead by example and mentor engineers in all aspects of planning, development and testing.
  • Be a catalyst for driving best-in-class technology frameworks and tooling while staying engaged with the latest technology trends.
  • Be on call, with the expectation to ability to solve problems and find solutions for the servicing team

Other

  • Ability to hold yourself and the team to high standards.
  • Strong communication (written and verbal) and interpersonal skills.
  • Four or more years of relevant industry experience with a track record of shipping high-quality systems and platforms at scale.
  • A strong work ethic
  • We are open to candidates from Canada, the United States, and Colombia.