Job Closed

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Flex

HSA/FSA payments, simplified.

Backend Engineer

Backend EngineerSoftware EngineerFull TimeRemoteSeniorTeam 11-50Since 2023H1B SponsorCompany SiteLinkedIn

Location

United States

Posted

81 days ago

Salary

$160K - $220K / year

Seniority

Senior

Bachelor Degree5 yrs expEnglishNode.jsPythonRustTypeScriptGo

Job Description

Backend Engineer

Flex

• Design, build, and own backend services and APIs that power Flex’s applications • Model the domain - eligibility rules, transactions, merchants, consumer accounts, etc. - in data structures and APIs that other teams build on • Partner with frontend, design, and business stakeholders to translate merchant and consumer needs into reliable APIs and workflows • Own and improve our backend service architecture, data models, and integrations • Analyze, troubleshoot, and resolve production issues rooted in business logic, data correctness, and transactional edge cases • Collaborate on cross-functional projects that connect the full Flex experience, from consumer checkout to merchant analytics • Create and maintain documentation for APIs, services, and on-call runbooks • Contribute to a culture of learning, problem-solving, and operational excellence

Job Requirements

  • 5+ years of experience building production backend services and APIs in a typed language (Rust, TypeScript/Node, Go, Python, etc.)
  • Strong relational database fundamentals and experience designing APIs that other teams or external partners depend on
  • You're resourceful, curious, and comfortable learning new tools quickly
  • You thrive in fast-paced, dynamic environments and enjoy wearing multiple hats
  • You're collaborative and enjoy working across teams to solve problems
  • You have an execution mindset and always keep the end user in mind
  • You're proficient at leveraging AI tools to ship faster.

Benefits

  • Competitive compensation and equity package
  • Flexible, remote-friendly work environment

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