Role Description We are seeking a Golang Software Engineer to join a high-impact engineering team focused on building modern backend services. This role will work closely with senior engineers to develop scalable, cloud-native applications leveraging microservices architecture and cutting-edge technologies. This is an excellent opportunity to contribute to a large-scale modernization initiative while working in a collaborative, fast-paced environment with strong engineering practices. Key Responsibilities - Design, build, test, and maintain backend services using Golang - Develop and scale applications within a microservices architecture - Build and integrate APIs and event-driven systems - Deploy and manage applications in cloud environments (GCP preferred) - Collaborate with cross-functional teams including DevOps, Product, and Business Analysts - Participate in troubleshooting, production support, and issue resolution - Contribute to continuous improvement of development processes and system architecture - Support and enhance platform services and shared infrastructure components Qualifications - 4+ years of overall software development experience - 1+ year of hands-on experience with Golang (Go) in backend development - Experience building and maintaining microservices-based systems - Strong knowledge of APIs - Distributed systems and event-driven architecture - Cloud platforms (preferably Google Cloud Platform) - Experience working with Docker and Kubernetes - Infrastructure as Code (e.g., Terraform) - CI/CD pipelines - Monitoring and observability tools - Strong problem-solving skills and ability to work independently - Ownership mindset across full development lifecycle Preferred / Nice-to-Have Skills - DevOps experience - Familiarity with AWS - Experience with C# - Knowledge of Jenkins or other CI/CD tools - Experience with AI / Machine Learning - Large Language Models (LLMs) - Cloud Spanner, MongoDB Atlas - Event-based or distributed systems Education - Bachelor’s degree in Computer Science or related field (preferred but not required) What Makes This Opportunity Unique - Work on modern, cloud-native technologies including Golang + GCP - Exposure to diverse backend projects in a growing platform environment - Collaborative team culture with strong engineering leadership - Opportunity for long-term growth and potential full-time conversion - Flexible, fully remote work environment Top Skills (Must-Have) - Golang (Go) - API development - Kubernetes - Docker - Microservices - Cloud (GCP preferred) - Terraform Pay and Benefits - The pay range for this position is $65.00 - $75.00/hr. - Medical, dental & vision - 401(k)/Roth - Insurance (Basic/Supplemental Life & AD&D) - Short and long-term disability - Health & Dependent Care Spending Accounts (HSA & DCFSA) - Transportation benefits - Employee Assistance Program - Time Off/Leave (PTO, Vacation or Sick Leave) Workplace Type This is a fully remote position. Application Deadline This position is anticipated to close on May 15, 2026.

Role Description We're looking for a Backend Engineer to design and own the services and APIs that power Flex - eligibility verification, split payments, and LMN (letter of medical necessity) issuance at checkout to name a few. You'll work closely with frontend engineers, design, and business stakeholders to build reliable systems that move real money correctly and unlock HSA/FSA spending for merchants and consumers. This is a role for someone who thrives in ambiguity, takes initiative, and is excited about building at an early-stage company. Responsibilities (What You’ll Do) - 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 Qualifications - 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 Requirements - Experience with building systems using Rust - Background in payments, fintech, or health benefits (HSA/FSA), or another regulated, money-moving domain 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

• Develops, builds, and maintains scalable back-end solutions in a multi-product microservice architecture • Implements, tests, and supports web services and APIs utilizing standard frameworks and source control tools • Implement unit and functional tests as well as providing testing guidance for Quality Assurance • Collaborates with frontend developers, product managers, and Devops to deliver backend services

• Architect and build backend services that power Archive’s platform, including APIs, data pipelines, and integration systems • Design and maintain scalable data models that support both operational features and analytical reporting • Implement integrations with ERPs, e-commerce platforms, inventory management services, and financial systems • Work closely with implementation teams and external stakeholders to understand system requirements and convert them into robust, maintainable solutions • Develop monitoring, observability, and data validation workflows to ensure consistent data quality across a multi-tenant environment