Flex - Backend Engineer
Upload My Resume
Drop here or click to browse · Tap to choose · PDF, DOCX, DOC, RTF, TXT
Requirements
• You have 5+ years of experience building production backend services and APIs in a typed language (Rust, TypeScript/Node, Go, Python, etc.) • You have 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 • Experience with building systems using Rust • Background in payments, fintech, or health benefits (HSA/FSA), or another regulated, money-moving domain
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
Benefits
• A mission-driven team making healthcare spending effortless • Early-stage impact - your work will directly shape our growth and success • Collaborative, high-trust, and transparent culture • Competitive compensation and equity package • Flexible, remote-friendly work environment
No credit card. Takes 10 seconds.