Sr Software Engineer B E

About the Role

Rebuy is on a mission to revolutionize shopping with intelligent, personalized experiences. As a Senior Software Engineer, Back-End, you will own consequential systems including the billing and payments engine, which determines how merchants are charged and financial balances flow across the product suite.

• Design and build centralized billing systems and integration layers using PHP and Go at scale.
• Lead high-priority technical migrations from Code Igniter 2 to Code Igniter 4.
• Design and implement secure, well-structured RESTful APIs to power financial data flows and Shopify integrations.
• Collaborate with product teams to identify AI automation opportunities and build supporting backend infrastructure.
• Establish engineering best practices, lead code reviews, and serve as a technical anchor for PHP across the organization.
• Ensure system security and compliance regarding authentication, encryption, and financial data.

• 5+ years of hands-on experience building backend applications with PHP and Go.
• Proven experience building or maintaining billing, payments, or financial systems in a SaaS environment.
• Strong expertise in designing scalable RESTful APIs and understanding API design patterns.
• Familiarity with cloud-based technologies, preferably Google Cloud Platform (GCP).
• Knowledge of security fundamentals including OWASP Top 10 and data encryption.
• Experience working in Scrum/Agile environments using tools like Jira and Bitbucket.

• Backend: PHP, Go, MySQL, BigTable, Elasticsearch
• Frontend: React, TypeScript, GraphQL, VueJS, Angular
• Cloud: GCP
• Tools: Jira, Bitbucket, Confluence, Slack

Required Skills