C++ Developer (IST/Switch)

At FIS, our technology and our people are moving forward. We advance the way the world pays, banks and invests. We believe in building inclusive, diverse teams. Together, we innovate to help our colleagues, clients and communities succeed. If you’re ready to grow your career and make an impact in fintech, we have one question: Are you FIS?

As a Senior Software Engineer specializing in C++, you will design, develop, and enhance enterprise-grade software solutions that support critical financial services operations. You will collaborate with product managers, architects, and engineering teams to translate business requirements into scalable, reliable, and high-performing applications. In this role, you will contribute across the full software development lifecycle, from design and coding to testing and deployment. Success is measured through software quality, technical innovation, system performance, and delivery of business value. What You Will Be Doing • Design, develop, test, and maintain high-performance software applications using C++ and modern development practices. • Collaborate with product managers, business stakeholders, and engineering teams to define technical requirements and solution designs. • Analyze complex business and technical challenges and deliver scalable, maintainable software solutions. • Create detailed technical specifications, architecture components, and design documentation. • Perform code reviews and promote engineering best practices, coding standards, and software quality initiatives. • Debug, troubleshoot, and resolve application defects to ensure reliability, stability, and performance. • Participate in software design discussions and contribute to architecture and technology decisions. • Develop and execute unit, integration, and system testing to ensure high-quality releases. • Support deployment, implementation, and maintenance activities while ensuring operational excellence. • Mentor junior engineers and share technical expertise across development teams and stakeholders. What your bring • 5+ years of experience developing commercial software applications using C++.  Good Experience in IST/Switch , Payment switch/processing, ISO 8583 messaging. • Strong understanding of object-oriented programming, data structures, algorithms, and software design principles. • Experience with software development lifecycle methodologies, including Agile, iterative, and waterfall approaches. • Proven ability to design, develop, test, and optimize complex enterprise applications. • Strong knowledge of design patterns, software architecture, and application scalability principles. • Experience creating technical documentation, system specifications, and solution designs. • Excellent analytical, problem-solving, communication, and collaboration skills. Preferred Qualifications • Experience within banking, financial services, fintech, or regulated environments. • Knowledge of networking, operating systems, database technologies, middleware, and distributed systems. • Experience with performance tuning, multithreading, and concurrent programming in C++. • Familiarity with software quality frameworks, industry standards, and continuous improvement methodologies. • Experience mentoring engineers and contributing to technical leadership initiatives. What We Offer you At FIS, you can grow your career as far as you want to take it. Here’s what else we offer: Opportunities to make an impact in fintech Personal and professional learning Inclusive, diverse work environment Privacy Statement FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice . Sourcing Model Recruitment at FIS works primarily on a direct sourcing model;