We are seeking a Lead Java Developer who will play a key role in shaping and evolving large-scale back-end platforms. You will be responsible for defining technical direction, building high-performance services, and supporting the growth of the engineering team through mentorship and technical leadership.This position combines hands-on development with technical ownership and close collaboration with multiple business and engineering stakeholders. It is a great fit for someone who enjoys solving complex problems and building systems designed to scale.What You Will Do Architect, implement, and maintain scalable back-end services and APIs using Java and the Spring ecosystem Take responsibility for back-end solutions from initial concept through production deployment and ongoing optimization Guide architectural and technical decisions to ensure performance, stability, and security at scale Continuously improve system efficiency, fault tolerance, and scalability Work closely with cross-functional teams including Product, Data, DevOps, and Marketing to align technical solutions with business goals Establish strong observability practices by implementing logging, metrics, and alerting solutions Set and promote high engineering standards, including code quality, testing strategies, and technical documentation Coach and support other developers, contributing to a culture of learning and technical excellence What We’re Looking For Degree in Computer Science or equivalent professional experience At least 5 years of hands-on Java development experience Demonstrated experience building distributed systems and microservice-based architectures Advanced knowledge of Spring Framework and Spring Boot Deep understanding of concurrent programming, scalability patterns, and performance tuning Experience developing and deploying applications in containerized environments (Docker, Kubernetes) Familiarity with CI/CD pipelines and modern software delivery practices Experience designing applications to run efficiently on Kubernetes, with attention to resource usage and scaling behavior Practical experience analyzing and improving application performance using profiling and monitoring tools Strong communication skills and the ability to provide technical leadership across teams Additional Skills (Nice to Have) Experience in programmatic advertising technologies such as DSPs, SSPs, or ad exchanges Knowledge of both relational and NoSQL databases (e.g. MongoDB, Couchbase) Exposure to reactive programming and frameworks like Spring WebFlux Hands-on experience with monitoring and alerting platforms such as Prometheus, Grafana, or Kibana