Lead Full Stack EngineerJob Location: O'Fallon, MO (Hybrid onsite 3 days/week)Job Travel Location(s): Must be able to travel to office as neededEmployment Type: C2HDuration: Long TermKey Technology: Java, Full Stack, SQLJob ResponsibilitiesLead the design, development, and deployment of high-quality Java microservices that integrate with modern front-end frameworks and third-party applications.Apply 12-factor app principles to ensure robust, scalable, and cloud-ready solutions.Contribute to all phases of the development lifecycle including planning, coding, testing, reviews, and delivery.Collaborate closely with engineers, product managers, TPMs, and test engineers to align technical and business goals.Perform code reviews, submit and manage Git pull requests, and support continuous improvement.Ensure adherence to Client's engineering best practices and compliance with enterprise security, operations, and architecture standards.Optimize application performance and reliability for large-scale, high-traffic systems.Skills and Experience RequiredRequired:12+ years of experience with either some lead experience or multiple senior developer roles.Extensive experience as a full-stack Software Engineer or Software Developer in a fast-paced, collaborative environment.Strong experience developing backend applications using Java.Proven expertise in designing and developing secure, scalable microservices that handle high traffic volumes, with strong knowledge of microservices architecture, RESTful API design, and integration patterns.Advanced SQL knowledge with databases like PostgreSQL, Oracle, etc., and experience building solutions that scale.Experience with front-end technologies, including HTML, JavaScript, and frameworks like Angular.Hands-on experience with cloud platforms such as AWS or Azure.Experience with CI/CD practices, containerization (Docker, Kubernetes), DevOps practices, automated testing, and version control using Git.Experience working in an Agile development environment.Excellent verbal and written communication skills, with the ability to articulate complex ideas clearly and concisely to both technical and non-technical stakeholders.Strong analytical and problem-solving abilities, with a focus on improving processes to accelerate delivery, foster innovation, reduce costs, and improve quality.DesiredExperience in the commercial card or corporate banking space.Familiarity with enterprise payment systems or financial services infrastructure.Demonstrated ability to manage or lead complex technical projects and mentor junior developers.Education: Bachelor's degree in Computer Science, Engineering, or a related field. Equivalent practical experience will be considered.