Vadim Tiulenev - CV Разработчик бэкенда на Java/Kotlin

Senior Backend Engineer · Yandex / Yango · 2024 – Present Design, develop, and scale high-load microservice backend systems for an international product, with ownership spanning service architecture, observability, AI integrations, and cross-team feature delivery. Microservice Development & Scalability • Designed and maintain Java/Spring Boot microservices serving 300,000+ user requests per day. • Delivered and maintained 5+ production services within an international product portfolio. • Designed and implemented 10+ RESTful APIs and internal service integrations. Framework Modernization & CI/CD • Led backend framework upgrades across 6 services, reducing build and deployment time by ~25%. • Authored and facilitated 5 Architecture Decision Records (ADRs), establishing architectural governance for the team. • Conducted cross-domain architectural reviews spanning 3 product domains. Observability & Incident Management • Owned observability for the Plus subscription tier across international regions, covering user and business metrics. • Designed and implemented a monitoring and alerting system covering 20+ critical service metrics. • Reduced Mean Time to Detect and Resolve (MTTR) by approximately 35–40% through proactive alerting and improved tooling. • Configured proactive alerts for high-priority user journeys, enabling faster incident detection. AI Feature Integration • Integrated AI-powered features into a customer support chat product serving users across 10+ countries. • Automated user request handling workflows, generating approximately $220,000 USD/year in business cost savings. • Optimized the backend of an AI narrator feature, reducing request processing latency by ~20%. Technical Leadership & Cross-functional Delivery • Served as Feature Lead for 10+ backend initiatives, coordinating development, integrations, and production releases. • Coordinated successful go-live for 4+ partner integrations. • Collaborated with 3+ cross-functional teams including backend engineers, ML engineers, product managers, and customer support. • Led a complex multi-stack partner integration spanning backend, frontend, QA, analytics, and adjacent teams across 3 product domains; delivered on schedule despite unplanned scope changes from the product manager and virtual team restructuring. Additional Technical Experience • Developed high-load backend services in Kotlin using Ktor and Koin frameworks. • Maintained and extended Ruby on Rails services in a polyglot engineering environment. • Worked with legacy systems and drove incremental migration of functionality to microservice architecture.

ITMO University · Saint Petersburg, Russia Bachelor's degree · Programming and Artificial Intelligence

Java · Spring Boot · Spring Framework · RESTful API · Microservices · Distributed Systems · High-Load Systems · Scalability · Observability · Monitoring · Alerting · MTTR · SLA · SLO · SQL · Kotlin · Ktor · Ruby on Rails · Architecture Decision Records · ADR · CI/CD · AI Integration · Feature Lead · Cross-functional Collaboration · Incident Management · System Design · Backend Engineering · API Design · Service Integration · Partner Integrations

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• Developed high-load backend services in Kotlin using Ktor and Koin frameworks.
• Maintained and extended Ruby on Rails services in a polyglot engineering environment.
• Worked with legacy systems and drove incremental migration of functionality to microservice architecture.