@RajkumarSony

Software Engineer

PLAN-B, Inc.•  February 2023 - Present•  Osaka, Japan

Developed scalable B2B SaaS digital marketing products as a Software engineer using Java, Spring Boot, and AWS, managing the full SDLC in an Agile environment. • Designed and implemented microservices using Java, Spring Boot, and Spring Security, enhancing modularity and reducing maintenance effort by 30%. • Integrated Auth0 OAuth 2.0 for secure login and access control, achieving 100% compliance with security best practices. • Automated deployment pipelines using GitHub Actions and CI/CD, reducing manual deployment errors and saving 50% of release time. • Deployed applications using AWS (EC2, S3, Lambda), optimizing system performance and cutting infrastructure costs by 25%. • Improved database access and ORM using MyBatis and Hibernate, increasing performance of batch processing tasks by 35%. • Integrated AI-driven writing features into an SEO project using OpenAI GPT-4o API, improving content generation efficiency by 70%. • Led implementation of new features and bug resolution in a commodity supply chain system, impacting over 10,000 users.

Programmer Analyst – Java Full Stack

Cognizant Technology Solutions•  March 2022 - January 2023•  Bangalore, India

Built enterprise-level applications as a full-stack developer, creating RESTful services and responsive UIs with Java, Angular, and AWS in Agile sprints. • Developed frontend modules using Angular, improving load times and responsiveness, which led to 15% higher user satisfaction (client feedback). • Built and maintained RESTful APIs using Spring Boot, resulting in 30% faster data integration between systems. Deployed scalable applications to AWS EC2 & S3, enabling high availability and reducing latency during peak usage by 20%. • Collaborated in Agile sprints, participated in daily standups and retrospectives, ensuring on-time delivery for 100% of assigned user stories. • Supported backend development and production deployments, resolving critical bugs within 24 hours, maintaining system reliability.