Staff Engineer (Checkout)

Come Make an Impact on Millions of Brazilians! At RecargaPay, we’re on a mission to deliver the best payment experience for Brazilian consumers and small businesses — by building a powerful digital ecosystem where the banked and unbanked connect, and where consumers and merchants have a one-stop shop for all their financial needs. We serve over 10 million users and process more than USD 4 billion annually. We’ve been profitable since 2022 and operate our own credit business. We are an AI-first, 100% remote team, scaling in the rapidly changing Brazilian financial market. Our goal? Deliver the best payment experience in Brazil for people and small businesses alike. We value autonomy, ownership, and a bias for action. We’re looking for people who are curious, hands-on, and driven by impact — who want to solve real problems, work with strong teams, and rethink what’s possible. If you’re ready to do your best work, at scale, with purpose — this is your place. Position Overview As a Sr Software Engineer, you will play a critical role in the success of a constantly and fast-paced growing company. You will be designing, developing, and maintaining robust and scalable systems that support the company's financial services, ensuring seamless operations and an excellent user experience. In a competitive and fast-paced industry, this team drives innovation by implementing secure, reliable, and cutting-edge solutions to meet evolving customer needs. Key Responsibilities Write well designed, testable, efficient code by using best software development practices. Contribute in all phases of the development lifecycle. Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review. Proposes initial technical implementation which supports architectural changes that solve scaling and performance problems. Work with version control using GitHub, conflict resolution, and automation of continuous integration processes. Create and maintain software documentation. Requirements Academic background oriented toward computer science, engineering, or software development disciplines. Experience hands-on engineering roles. Experience to deal with medium domains with medium/high complexity. A solid understanding of how web applications work including security, session. management, and best development practices. Knowledge of relational database systems and Object Oriented Programming. Knowledge in Domain Driven Design. Knowing Microservice Architecture is a plus. Ability to work and thrive in a fast-paced environment, learn rapidly and master diverse web technologies and techniques. Proven ability to design complex distributed applications built for high performance and throughput while being scalable and reliable. Development using Java, Spring Boot, PostgreSQL, Kafka and AWS. Experience with asynchronous programming. Demonstrated experience profiling and performance tuning Java applications, and using monitoring tools for production application monitoring. Practical experience applying AI frameworks in development projects. Soft Skills Strong communication and collaboration skills, with the ability to work closely with cross-functional teams including Chapters Engineering, Architecture, Infrastructure and Mobile Engineering. Proactive mindset with a sense of ownership and accountability for delivering high-quality, user-centric mobile experiences. Ability to mentor peers, share knowledge, and contribute to a culture of continuous improvement and technical excellence. Flexibility and adaptability in a fast-changing environment, with openness to feedback and eagerness to learn. Alignment with company values: ownership, excellence, adaptability, and innovation. Industry-Specific Knowledge It is desirable to have practical familiarity with one or more core financial domains such as lending, payments, credit cards, open finance, fraud prevention, merchant acquiring, or investment services, along with an understanding of their fundamental workflows and business drivers. Experience in how these domains intersect to influence revenue, risk management, and customer satisfaction is highly valued. Ideally, candidates will have applied this knowledge to deliver solutions such as loan-origination engines with real-time decisioning; scalable payment-processing platforms integrated with core banking systems and third-party gateways; secure open-finance interfaces compliant with industry regulations; automated fraud-detection pipelines leveraging behavioral analytics; or financial reporting and reconciliation engines for regulatory compliance. The ability to translate complex compliance mandates (e.g., KYC/AML, PCI-DSS, GDPR) into resilient, high-performance systems without compromising user experience is considered a strong asset.