Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a Java Backend Engineer with over 5 years of experience in designing and scaling microservices for Telecom, Fintech, and SaaS domains. Skilled in Java 17+, Spring Boot, Kafka, and cloud-native solutions, I specialize in building robust backend systems that effectively handle high throughput and optimize performance. I am currently based in Germany with a valid work permit and actively improving my German language skills from A2 to B1 level.…I am a Java Backend Engineer with over 5 years of experience in designing and scaling microservices for Telecom, Fintech, and SaaS domains. Skilled in Java 17+, Spring Boot, Kafka, and cloud-native solutions, I specialize in building robust backend systems that effectively handle high throughput and optimize performance. I am currently based in Germany with a valid work permit and actively improving my German language skills from A2 to B1 level.

K. Powsikan

Back-End Developer, Programmer, Web Developer





I am a Java Backend Engineer with over 5 years of experience in designing and scaling microservices for Telecom, Fintech, and SaaS domains. Skilled in Java 17+, Spring Boot, Kafka, and cloud-native solutions, I specialize in building robust backend systems that effectively handle high throughput and optimize performance. I am currently based in Germany with a valid work permit and actively improving my German language skills from A2 to B1 level.…I am a Java Backend Engineer with over 5 years of experience in designing and scaling microservices for Telecom, Fintech, and SaaS domains. Skilled in Java 17+, Spring Boot, Kafka, and cloud-native solutions, I specialize in building robust backend systems that effectively handle high throughput and optimize performance. I am currently based in Germany with a valid work permit and actively improving my German language skills from A2 to B1 level.

Available to hire

I am a Java Backend Engineer with over 5 years of experience in designing and scaling microservices for Telecom, Fintech, and SaaS domains. Skilled in Java 17+, Spring Boot, Kafka, and cloud-native solutions, I specialize in building robust backend systems that effectively handle high throughput and optimize performance. I am currently based in Germany with a valid work permit and actively improving my German language skills from A2 to B1 level.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

German

Beginner

Tamil

Fluent

Work Experience

Senior Software Engineer at Arimac Lanka

September 1, 2022 - Present

Designed and deployed high-throughput APIs handling 1,500+ requests per minute, reducing latency by 20% using Spring Boot, Web Flux, and microservices architecture. Enhanced My Ooredoo Self Care App’s backend, reducing downtime by 15% while supporting over 2 million customers. Authored clear technical documentation to streamline onboarding and cross-team collaboration. Utilized NestJS, GraphQL, PostgreSQL, and Docker for robust backend services with workflow automation. Implemented role-based access and property tracking modules enabling secure data management for 20+ enterprises. Improved CI/CD pipeline reliability by 30%, reducing deployment failures and increasing patch release frequency from bi-weekly to weekly.

Software Engineer at Arimac Lanka

September 1, 2022 - August 21, 2025

Built backend services for Ooredoo Algeria with Java & Spring Boot, supporting over 1 million active users managing telecom services. Optimized database queries and indexing, reducing server load by 35% and cutting infrastructure costs by 15%. Reduced debugging time by 25% through clean coding practices and structured logging. Collaborated in Agile teams achieving 95% on-time delivery across multiple sprint releases.

Associate Software Engineer at Debaly

April 1, 2021 - August 21, 2025

Delivered 3 MVPs in under 4 months, accelerating product-market fit and increasing early user feedback by 40%. Developed scalable APIs with NestJS and MongoDB handling 10,000+ requests per day with 99.9% uptime. Reduced handover time between teams by 20% by improving documentation and transition processes. Learned NestJS, React Native, and Firebase in under 2 weeks, cutting onboarding time by 50% compared to peers.