Provided technical consultancy to a leading Australian telecom operator, modernizing a legacy Java and Oracle system using Scala, Python, Spark, and Postgres. Spearheaded the data processing module and mentored six junior developers, improving coding skills and enhancing team productivity and code quality. Established structured documentation standards, increasing knowledge transfer efficiency and reducing support tickets by 25%.

Java Developer – External contract at Hutchison Drei Austria GmbH

November 30, 2023 - August 21, 2025

Transformed a legacy Java and Oracle payment engine for a leading Austrian telecom by optimizing it into a scalable microservices architecture with event-driven design, improving performance by 30%. Collaborated with solution architects to redesign core payment workflows, enabling faster processing of over five million transactions per billing cycle. Developed and executed over 100 automated test cases, enhancing deployment speed by 30% via CI/CD implementation. Implemented robust monitoring and logging solutions for increased transparency and faster incident resolution.

Backend Developer at Dryad Networks GmbH

May 1, 2023 - Present

Led the Scala and Java backend engine development, optimizing a system processing over 500,000 wildfire sensor data points daily. Developed a user management module and health monitoring dashboard, boosting platform functionality by 40%. Optimized performance and scalability to support over 200,000 sensors aligning with organizational growth. Leveraged Scala, Java, AWS, Redis, and Kubernetes to reduce processing time by 50%.

Senior Software Engineer at Informatics International Ltd

June 30, 2020 - August 21, 2025

Led development of the Avabill Telecom Billing System covering rating, billing, invoicing, and subscription management through the full software development lifecycle. Managed a five-member development team completing five projects and improving efficiency by 30% through effective requirement analysis and design. Successfully handled six international clients with 600K+ daily transactions and over 800K users/subscriptions, ensuring seamless customer handling and high-quality delivery.

Senior Software Engineer at Finnovation – Capital Alliance Ltd

November 30, 2022 - August 21, 2025

Led the transformation of existing systems to Angular and Spring Boot, overseeing development and maintenance of fintech solutions including the Fixed Income Securities module in investment banking. Engineered CI/CD practices reducing deployment time by 100% and accelerating production releases to a weekly cadence. Reduced post-release bug reports by 25% by implementing robust automated and manual testing strategies.