Senior Backend Software Engineer

Senior Backend Software EngineerKavaliro is seeking a Senior Backend Software Engineer for our local Jacksonville client. In this role, you'll take ownership of core improvements to a rail simulation analysis platform, balancing deep technical development with client-facing collaboration. This is a fast-paced, hands-on position for an experienced engineer who enjoys solving complex problems and working closely with both customers and internal teams.What You'll Do:Serve as a technical point of contact for clients, ensuring contractual requirements are met and supporting technical troubleshooting as issues arise.Develop, configure, and enhance train simulation software in C++, modeling locomotive behavior and route-based force dynamics.Debug and maintain complex codebases using Microsoft Visual Studio.Participate in system installation, testing, validation, and issue resolution alongside internal teams and clients.Deliver software updates and support deployment and acceptance testing with customers.Provide technical guidance and mentorship to engineers and technicians assigned to your projects.Contribute to ongoing system maintenance, upgrades, and modernization efforts.Identify and recommend improvements to performance, reliability, and development efficiency.Minimum Qualifications:3+ years of professional C++ development experience using Microsoft Visual Studio, including multi-threaded programming for high-performance applications and experience with MFC libraries.Bachelor's degree in Computer Science or a related technical field, plus at least 2+ years of professional engineering experience writing production C++ code.Proven experience contributing to or leading software architecture initiatives, from design and planning through implementation and operational support.Strong object-oriented programming, debugging, and troubleshooting skills.Excellent communication skills and the ability to work directly with clients and cross-functional teams.Self-driven, dependable, and comfortable working independently.Ability to learn new technologies and domains quickly.Creative problem-solving mindset with a willingness to challenge existing approaches.Hands-on experience with hardware integration testing and troubleshooting for real-time simulation systems.Authorized to work in the United States.Preferred Skills & Experience:Experience with real-time systems using technologies such as C++, MFC, Python, SQL, VBA, PHP, JavaScript, Perl, Qt UI, and batch scripting.Familiarity with REST APIs and web service integrations.Exposure to GIS or spatial data systems.Experience with Azure cloud development and deployment is a plus.Background in AI, machine learning, or large-scale data systems is a plus.Experience working with Kanban-style tools such as Trello.Ability to manage multiple priorities in a fast-moving environment.Strong interpersonal skills and a collaborative working style.Fluency in English for technical communication; French language skills are a bonus.Experience with modeling and simulation software or familiarity with the railway industry is a plus.Demonstrated leadership or mentoring experience, with a focus on team growth.Confidence working within large, complex, or legacy codebases.Practical understanding of applied engineering math concepts such as force, acceleration, friction, momentum, and power.Kavaliro provides Equal Employment Opportunities to all employees and applicants. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Kavaliro is committed to the full inclusion of all qualified individuals. In keeping with our commitment, Kavaliro will take the steps to assure that people with disabilities are provided reasonable accommodations. Accordingly, if reasonable accommodation is required to fully participate in the job application or interview process, to perform the essential functions of the position, and/or to receive all other benefits and privileges of employment, please respond to this posting to connect with a company representative.