• Design, develop, and maintain the Transactional Billing Automation platform, including tracking contract information, prepaid usage blocks, rollovers, and calculating projected usage and balances. • Build and support responsive web application and RESTful APIs to automate transactional billing operations and reduce manual processing. • Develop dynamic UI components for managing customer contracts, multi-product selections, invoice details, and billing summaries. • Implement business logic for prepaid balances, rollover amounts, block total calculations, invoice validations, and contract lifecycle management. • Collaborate with product owners, software engineers, and QA engineers to gather billing requirements and deliver scalable automation solutions. • Create reusable components, clean architecture patterns, and well-documented APIs to improve maintainability and long-term scalability. • Develop unit tests, integration tests, and automated validation processes to ensure billing accuracy and support safe application enhancements. • Participate in code reviews and enforced coding standards, security best practices, and performance optimization techniques. • Develop operational dashboards and billing reports to provide visibility into contracts, prepaid usage, rollover balances, projected customer usage, and actual consumption trends. • Follow development standards, branching strategies, and pull request workflows to deliver clean, secure, and maintainable code through reviews and testing. • Support Agile development processes, including sprint planning, backlog refinement, stand-ups, demos, and retrospectives.

• Share ownership of the full development lifecycle from investigation and architecture to quality assurance, deployment, monitoring, and maintenance • Tackle complex problems with a practical, hands-on approach • Collaborate closely, lead PoCs and refactoring initiatives, and promote best practices • Actively contribute to enhancing the tech stack, which primarily includes Spring 5, Java 11+, AWS ECS, and Lambdas

• Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on Node.js and ReactJS • Maintain a consistently high level of quality throughout all stages of the development • Communicate effectively to collaborate closely with the team and gain full context for complex tasks • Follow the best engineering practices, as well as company and client guidelines • Play supervisory, advisory, and coaching roles for less-experienced engineers on the team • Promote clean code, as well as design patterns and principles

• Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on Node.js and ReactJS • Maintain a consistently high level of quality throughout all stages of the development • Communicate effectively to collaborate closely with the team and gain full context for complex tasks • Follow the best engineering practices, as well as company and client guidelines • Play supervisory, advisory, and coaching roles for less-experienced engineers on the team • Promote clean code, as well as design patterns and principles