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Backend програміст
- Age:
- 19 years
- City of residence:
- Lviv
- Ready to work:
- Lviv, Remote
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VITALII LOTOTSKYI
SOFTWARE ENGINEER | KOTLIN & JAVA
Lviv, Ukraine | [open contact info ](look above in the "contact info" section) | [open contact info ](look above in the "contact info" section)
portfolio.knalis.rest | github.com/knliiss | LinkedIn
PROFESSIONAL SUMMARY
Software engineer specializing in Kotlin/Java backend and full-stack development. Built and maintained independent
products with active users and paid features, including event-driven and high-concurrency systems.
TECHNICAL SKILLS
Languages: Kotlin, Java, TypeScript, Rust, Go
Backend: Spring Boot, REST APIs, Apache Kafka, WebSocket
Frontend: React, WebAssembly
Data & tools: PostgreSQL, Redis, Docker, Keycloak, Git, JUnit
EXPERIENCE
Independent Software Engineer | Product development
Mnemos | Event-driven platform
Kotlin · Spring Boot · Kafka · PostgreSQL · React · TypeScript
• Designed and deployed a microservice platform used by approximately 150 people, with paid features and real-time
updates.
• Implemented Kafka event processing, WebSocket delivery, Keycloak authentication, and transactional outbox/inbox
patterns.
github.com/knliiss/Mnemos
C7xBotManager | Concurrent automation platform
Java · Go · Java NIO · WebView2
• Built a headless Java runtime handling up to 500 concurrent client sessions using non-blocking I/O, proxy
management, and diagnostics.
• Developed a Go-based desktop shell for a niche product used by around 10 people and distributed through one-
time purchases.
github.com/knliiss/C7xBotManager
PROJECTS
Studium | Full-stack LMS (academic project)
Java · Spring Boot · React · TypeScript · PostgreSQL
• Developed and tested a role-based learning platform with microservices, an API gateway, asynchronous events,
and a React frontend.
github.com/knliiss/Studium
WaveCode | Open-source optical-code SDK and web scanner
Rust · WebAssembly · React · TypeScript
• Designed an error-correcting optical format for music links and built a cross-platform Rust SDK plus a mobile-first
browser scanner and encoder.
github.com/knliiss/WaveCode | github.com/knliiss/WaveCode-Web
ACHIEVEMENTS
BEST Engineering Competition (BEST Lviv)
2026 — 1st place, Innovative Design; Airlogix “Most Creative Approach” award.
2025 — 2nd place, Team Design.
EDUCATION
Lviv Polytechnic National University
Software Engineering, Bachelor’s program — 3rd year (in progress)
LANGUAGES
Ukrainian — Native | English — B1
SOFTWARE ENGINEER | KOTLIN & JAVA
Lviv, Ukraine | [
portfolio.knalis.rest | github.com/knliiss | LinkedIn
PROFESSIONAL SUMMARY
Software engineer specializing in Kotlin/Java backend and full-stack development. Built and maintained independent
products with active users and paid features, including event-driven and high-concurrency systems.
TECHNICAL SKILLS
Languages: Kotlin, Java, TypeScript, Rust, Go
Backend: Spring Boot, REST APIs, Apache Kafka, WebSocket
Frontend: React, WebAssembly
Data & tools: PostgreSQL, Redis, Docker, Keycloak, Git, JUnit
EXPERIENCE
Independent Software Engineer | Product development
Mnemos | Event-driven platform
Kotlin · Spring Boot · Kafka · PostgreSQL · React · TypeScript
• Designed and deployed a microservice platform used by approximately 150 people, with paid features and real-time
updates.
• Implemented Kafka event processing, WebSocket delivery, Keycloak authentication, and transactional outbox/inbox
patterns.
github.com/knliiss/Mnemos
C7xBotManager | Concurrent automation platform
Java · Go · Java NIO · WebView2
• Built a headless Java runtime handling up to 500 concurrent client sessions using non-blocking I/O, proxy
management, and diagnostics.
• Developed a Go-based desktop shell for a niche product used by around 10 people and distributed through one-
time purchases.
github.com/knliiss/C7xBotManager
PROJECTS
Studium | Full-stack LMS (academic project)
Java · Spring Boot · React · TypeScript · PostgreSQL
• Developed and tested a role-based learning platform with microservices, an API gateway, asynchronous events,
and a React frontend.
github.com/knliiss/Studium
WaveCode | Open-source optical-code SDK and web scanner
Rust · WebAssembly · React · TypeScript
• Designed an error-correcting optical format for music links and built a cross-platform Rust SDK plus a mobile-first
browser scanner and encoder.
github.com/knliiss/WaveCode | github.com/knliiss/WaveCode-Web
ACHIEVEMENTS
BEST Engineering Competition (BEST Lviv)
2026 — 1st place, Innovative Design; Airlogix “Most Creative Approach” award.
2025 — 2nd place, Team Design.
EDUCATION
Lviv Polytechnic National University
Software Engineering, Bachelor’s program — 3rd year (in progress)
LANGUAGES
Ukrainian — Native | English — B1
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The candidate's resume is posted at https://www.work.ua/resumes/20975404/