Senior Software Engineer - Java API developer

About the role

About the Role

We are seeking a highly skilled Senior Java API developer with experience in building high-performing, scalable, enterprise-grade backend systems in the digital advertising domain. In this role, you will design, develop, and optimize backend services powering Mobile Ad SDK systems and AI-driven products such as recommendation engines, monetization optimization platforms, and intelligent ad delivery systems. This role will be responsible for productionizing machine learning models, building high-performance APIs, and enabling intelligent decision systems at scale

What You'll Do:

- Design and develop scalable, secure, and high-performance RESTful APIs using Java (Java 11+) and Spring Boot.

- Own end-to-end solution design, planning, execution, and release of backend features.

- Build and maintain backend services supporting AI-driven initiatives (recommendation systems, predictive analytics).

- Productionize and integrate ML models into backend systems, enabling real-time intelligent decisioning.

- Develop efficient data models and optimize database queries (MySQL/PostgreSQL) for performance and reliability.

- Ensure API security using OAuth2, JWT, and role-based access controls.

- Build for scale—design systems capable of handling high concurrency, large data volumes, and low-latency requirements.

- Implement observability best practices including logging, monitoring, tracing, and alerting.

- Participate in code reviews, design discussions, and technical decision-making to ensure engineering excellence.

- Collaborate cross-functionally with Analytics, Product, SDK, UI, Ad server, DevOps, and QA teams to deliver AI-powered features.

- Leverage generative AI tools and advanced prompt engineering techniques to enhance productivity and code quality.

We’d Love for You to Have

- 3–6 years of experience in Java development in Linux/UNIX environments.

- Strong proficiency in Core Java, OOPS, Data Structures, and J2EE technologies.

- Hands-on experience with Spring, Spring Boot, and Hibernate.

- Strong experience in REST Web Services development and microservices architecture.

- Proficiency in SQL, schema design, indexing, performance tuning, and complex queries.

- Experience with Docker, Kubernetes, Jenkins, Maven, Git, and CI/CD pipelines.

- Experience working on high-performance and scalable AdTech systems (preferred).

- Working knowledge of Python and integration with AI/ML services.

- Understanding of advanced AI concepts including RAG, agentic AI, model fine-tuning, and recommendation systems.

- Experience in JUnit, TDD, refactoring, and Agile development practices.

- Demonstrated ability to work independently and drive technical ownership.

Qualification:

Should have a bachelor’s degree in engineering or an equivalent degree from a well-known institute/university.