Viktor V.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Are you searching for a highly skilled software developer who combines over a decade of experience with a passion for creating innovative, high-performing solutions? Look no further! I specialize in crafting robust and scalable applications using Java, Kotlin, and Go, with a strong focus on architecture, clean code, and delivering exceptional quality. My expertise spans across: 𝗞𝗲𝘆 𝗦𝗸𝗶𝗹𝗹𝘀 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: ✔ 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀: Java, Kotlin, Go, TypeScript, JavaScript, Bash ✔ 𝗠𝗼𝗯𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Android (Jetpack Compose) ✔ 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: Spring Boot, Hibernate, Redis, Kafka ✔ 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: PostgreSQL, MySQL, MongoDB ✔ 𝗗𝗲𝘃𝗢𝗽𝘀 𝗧𝗼𝗼𝗹𝘀: Kubernetes, Docker (docker-compose, Swarm), Linux Administration ✔ 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸: Angular ✔ 𝗕𝘂𝗶𝗹𝗱 𝗧𝗼𝗼𝗹𝘀: Gradle, Maven ✔ 𝗩𝗲𝗿𝘀𝗶𝗼𝗻 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: GIT 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀 𝗼𝗳 𝗠𝘆 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Designed and implemented a custom VPN protocol, showcasing my ability to deliver high-performance network solutions. 𝗘𝗻𝗱-𝘁𝗼-𝗘𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Adept at building applications from scratch, whether it’s a modern mobile app using Jetpack Compose or a distributed backend with Spring Boot and Go. 𝗖𝗿𝗼𝘀𝘀-𝗗𝗼𝗺𝗮𝗶𝗻 𝗞𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲: Skilled in both backend and frontend technologies, enabling me to bridge gaps between systems and create seamless user experiences. 𝗟𝗶𝗻𝘂𝘅 𝗔𝗱𝗺𝗶𝗻𝗶𝘀𝘁𝗿𝗮𝘁𝗶𝗼𝗻: Advanced proficiency in managing servers and optimizing environments for performance and reliability. 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? 𝗣𝗿𝗼𝘃𝗲𝗻 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Over 10 years in web and software development, creating business-critical solutions for diverse industries. 𝗤𝘂𝗮𝗹𝗶𝘁𝘆-𝗗𝗿𝗶𝘃𝗲𝗻: I follow solid programming principles and prioritize code maintainability and performance. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝘃𝗲 𝗧𝗵𝗶𝗻𝗸𝗲𝗿: Always eager to take on challenging problems and deliver cutting-edge solutions tailored to your needs. Let’s collaborate to bring your ideas to life! Whether you need a reliable partner for your next Android app, a high-performance backend system, or a custom networking solution, I’m here to help. Ready to get started? Send me an invite, and let’s discuss how I can contribute to your project’s success!