Senior Software Engineer (PHP/ Ruby on Rails) - Finance

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer (PHP/ Ruby on Rails) - Finance based in Brazil. This role is designed for a senior backend engineer who enjoys solving complex technical challenges and modernizing mission-critical systems. You will take ownership of a key business domain within a fintech environment, leading the transformation of legacy platforms into scalable and reliable solutions. The position requires strong engineering judgment, deep technical expertise, and the ability to navigate complex systems with incomplete documentation. You will drive migration strategies, improve system stability, and build solutions that directly impact business performance and customer experience. Working remotely with international teams, you will collaborate with experienced professionals on high-impact technology initiatives. This opportunity is ideal for an engineer who values autonomy, technical ownership, and building resilient products through thoughtful architecture and execution.