Nikita Kornilov

About

Software Engineer with more than 4 years of experience in backend engineering, distributed systems, and event-driven architecture. I specialize in building and optimizing high-load microservices in fintech.

Currently at T-Bank (ex. Tinkoff Bank), working on a Marketing Platform that serves over 50 million clients. My focus is on performance, reliability, observability, and cost efficiency across the platform.

I hold a BASc in Computer Software Engineering from ITMO University, one of Russia's top technical universities.

4+

Years of experience

20k

RPS achieved

90+

Microservices migrated

Experience

Senior Java Software Engineer

T-Bank (ex. Tinkoff Bank) · Saint-Petersburg, Russia

Jan 2025 — present Senior

Built a sharded PostgreSQL service, performance-tested to handle ~10k RPS under production-like load.
Introduced targeted caching to reduce MongoDB load and prevent failures in a critical service.
Led data migrations and optimizations that cut company SMS delivery costs.
Mentored 10+ Java trainees on company's internal courses.

Middle Java Software Engineer

T-Bank (ex. Tinkoff Bank) · Saint-Petersburg, Russia

Sept 2023 — Jan 2025 Middle

Rewrote a core service, boosting throughput from ~10k to ~20k RPS via optimizations.
Authored and rolled out a Validation ADR across services.
Cut logging memory usage by ~130% across services.
Modernized GitLab CI pipelines for speed & stability.

Junior Java Software Engineer

T-Bank (ex. Tinkoff Bank) · Saint-Petersburg, Russia

Jan 2022 — Sept 2023 Junior

Built an event-driven service using Reactor and Kafka for a new subsystem.
Migrated 90+ microservices to new cloud infrastructure and Kafka cluster.
Fixed memory leaks in tests, cutting CI running time from ~30m to ~10m.
Implemented Kafka health checks, improving K8s pod stability and eliminating reloads.