Backend Engineer
New
F
FlexFintech
United StatesFull-TimeMiddle
Salary not disclosed
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Job Details
- Experience
- 5+ years of experience
- Required Skills
- Node.jsPythonTypeScriptGoRustRESTful APIs
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
- Experience designing APIs that other teams or external partners depend on
- Resourceful, curious, and comfortable learning new tools quickly
- Thrive in fast-paced, dynamic environments and enjoy wearing multiple hats
- Collaborative and enjoy working across teams to solve problems
- Execution mindset and always keep the end user in mind
- Proficient at leveraging AI tools to ship faster
Responsibilities
- 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
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