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Kirill User

@kirilluser7

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Golang Developer at Tutu, improving authentication latency and accelerating Kafka-to-ClickHouse data pipelines.

Russian Federation

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What I'm looking for

I'm looking for a full-time Golang Developer role, remote, hybrid, or on-site.

At Tutu, I work on Keycloak-based authentication and streaming analytics. I implemented Redis session and token caching, reaching an approximately 95% cache hit rate and around 60 ms p95 authentication latency.

I also built a Go service that collects events and publishes them to Kafka, reducing onboarding time for a new data source from approximately two weeks to one day. Changes to Kafka balancing and ClickHouse partitioning reduced lag by 2–3 times and increased throughput by approximately 40%.

At Innotech, I worked on digital back-office services for a bank. I developed asynchronous document workflows with Kafka, reducing API p95 latency from 15–20 seconds to approximately 500 ms, and introduced PostgreSQL partitioning that improved p95 SELECT latency from 320 ms to approximately 90 ms.

Experience

Work history, roles, and key accomplishments

Current

Golang Developer

Current

Tutu

Mar 2024 - Present (2 years 8 months)

Worked on Keycloak-based authentication and streaming analytics for a platform serving 40 million monthly visits. Implemented high-availability clusters, Redis caching, circuit breakers, and observability, reducing MTTR and improving throughput.

Go PostgreSQL Redis Kafka Redpanda Clickhouse Docker Kubernetes Keycloak Consul Prometheus Grafana gRPC REST APIs Linux GitLab CI CD

Golang Developer

Innotech

Aug 2022 - Feb 2024 (1 year 6 months)

Developed digital back-office services for a bank's internal department with 20,000 daily active users. Implemented idempotent event processing, retries with DLQ, outbox pattern, and PostgreSQL partitioning, improving latency and reliability.