Sobre

About us: WEX Inc. is a leading and growing global provider of payment processing, information management, and fleet card payment solutions. We hire people who share our passion for continuous innovation and client service that is unparalleled in the industry. We are looking for an experienced Software Development Engineer Senior (Backend) to join our Platform Modernization group and help deliver highly scalable, reliable, and secure systems. A successful candidate will have a strong technical background in designing and delivering complex software solutions, proven ability to own features end-to-end, and a mindset that emphasizes quality, testing, and continuous improvement. This individual will be a key contributor to team success, mentoring others, influencing engineering practices, and driving technical excellence as we continue to scale our platforms globally. How you'll make an impact: Design, implement, test, and deploy large-scale software systems with a focus on maintainability, scalability, and performance leading by influence. Demonstrates system-level thinking and technical leadership through influence rather than management. Take end-to-end ownership of stories, regularly delivering complex features and suggesting better implementation paths operating as a senior-level individual contributor with minimal guidance. Consistently write thorough unit, integration, and UI tests; drive test-first approaches and coach others on quality practices. Actively contribute to grooming by asking insightful testability and edge-case questions that improve story quality. Conduct thoughtful design and code reviews, providing meaningful feedback on functionality, architecture, and test coverage. Mentor less-experienced engineers, raising the team’s technical bar through coaching and sharing best practices and improving code quality, testing, and delivery practices. Participate in system design and architecture discussions, influencing decisions with deep technical insight, contributing actively to design, grooming, and review discussions, shaping both features and engineering culture. Proactively identify opportunities for automation, refactoring, and improvement to enhance developer productivity and system reliability. Contribute to a culture of collaboration, transparency, and continuous learning across distributed teams in the US and Brazil. Experience you'll bring: Advanced English communication skills. Bachelor’s degree in Computer Engineering, Electrical Engineering, Computer Information Systems, Management Information Systems, or a related field. Master’s degree. Proven senior professional software engineering experience. Proven expertise in one or more modern programming languages such as Java, Python, C#, or C++. Strong knowledge of data structures, algorithms, and system design principles. Experience building distributed systems, microservices, and RESTful APIs. Demonstrated ability to apply a QA mindset: test-first development, edge-case thinking, and driving quality proactively. Comfortable working across the full stack (front-end, back-end, data, cloud). Track record of mentoring peers and improving engineering practices. Ability to operate independently and confidently while collaborating effectively in agile teams. Desired qualifications & experiences: Experience with Cloud Computing platforms (particularly AWS). Hands-on experience with containerization (Docker, Kubernetes) and CI/CD pipelines. Strong technical fundamentals in Linux, networking, and operating systems. Experience with relational and non-relational databases, including schema design and performance tuning. Familiarity with observability tools (logging, metrics, tracing) to ensure system reliability. Bias toward data-driven decision-making and using metrics to guide improvements. WEX is a global commerce platform that helps businesses solve for operational complexities like employee benefits, managing and mobilizing fleets, and streamlining payments. With over 6,500 employees, we work with large and small companies in more than 200 countries and territories, and can tailor our services to meet the unique needs of their businesses. We hire people who share our passion for continuous innovation and client service that is unparalleled in the industry. Offering comprehensive and market competitive benefits, our offerings are designed to support your personal and professional well-being. If you’re looking for a growing career - come be part of WEX today. To learn more about our employee benefits, please click here. WEX is an equal opportunity employer committed to diversity and inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to sex, race, color, age, national origin, religion, sexual orientation, gender identity, protected veteran status, disability or other protected status. WEX promotes a drug-free workplace. Qualified individuals with a disability have the right to request a reasonable accommodation. If you require a reasonable accommodation as a result of your disability at any point in the job application process, please submit your request through our Reasonable Accommodation Request Form. This form is for accommodation requests only and cannot be used to inquire about the status of applications.