Principal Backend Engineer (Java, Kotlin, Rust)

Backend-engineer with over 20 years of experience, specializing in Telecoms, billing, and finance, with exposure to travel and education industries. Proven team lead, adept at both coding and project delivery. Enjoys side-projects for continuous learning and skill development. Experienced with Monoliths, distributed systems (microservices), and distributed monoliths. Recent projects include a document store using Apache Jackrabbit, Java, and Kotlin; a Rust AWS CLI client; and migrating a test suite from JUnit4 to JUnit5. Available for freelance, contract, and full-time roles.