Open to opportunities

Aidar Akitov

@aaktv

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Senior Java Developer specializing in microservices, integrations, and system optimization for high-load production.

Germany

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What I'm looking for

I’m looking for a team with a strong engineering culture—clean architecture and a product mindset—where I can optimize microservices and JVM/DB behavior to ship reliable high-load features.

Java developer with experience in designing and maintaining high-load systems. I am focused on delivering value: I like to bring complex tasks to release and see the real impact in production. I specialize in microservice architecture, integrations, and system optimization (N+1 elimination, ClickHouse, GC tuning).

I like to grow technically and understand the technologies under the hood: I am deeply immersed in the internal structure of the JVM (Java Memory Model, Classloading, multithreading patterns) and DBMS mechanisms (for example, WAL and MVCC in PostgreSQL). Outside of work, I am interested in the development of artificial intelligence and Machine Learning (in particular, computer vision and audio analysis). I am looking for a team with a strong engineering culture, a focus on clean architecture and a product mindset

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Brandquad

Feb 2025 - Present (1 year 5 months)

Reduced XML feed generation memory to a constant 300MB using JDBC Streaming and StAX. Migrated 15M SKU attributes from PostgreSQL to MongoDB (5x faster catalog filtering) and built a Kafka-based async media pipeline that eliminated 504 Gateway Timeout errors.

Apache Kafka MongoDB PostgreSQL Docker Gitlab CI

Senior Java Developer

Sift

Jul 2023 - Jan 2025 (1 year 6 months)

Eliminated Kafka Rebalance Storms by fixing consumer configuration under 5,000 RPS load. Reduced application build time from 28 to 9 minutes via parallelized GitLab CI tests, and improved fraud-ring detection to under 10ms with a Neo4j graph model.

Apache Kafka Neo4j Redis Clickhouse gRPC Kubernetes Gitlab CI

Middle Java Developer

Wirex

Jan 2022 - Jun 2023 (1 year 5 months)

Implemented a Transactional Outbox using SKIP LOCKED SQL blocks, reducing financial event loss to zero. Improved analytics performance by moving from Postgres to ClickHouse, cutting dashboard load time from 4,000ms to 150ms.

Transactional Outboxes Skip PostgreSQL Clickhouse Apache Kafka Redis gRPC Database Constraints

Java Developer

OptimoRoute

Jun 2020 - Dec 2021 (1 year 6 months)

Resolved N+1 query issues with @EntityGraph, reducing API response time from 3,500ms to 200ms. Stabilized PDF generation by isolating it into RabbitMQ workers (keeping RAM within 1.5GB) and eliminated table lock downtime using standardized batched migrations for a 15M-row database.

Java Spring Boot PostgreSQL MongoDB RabbitMQ Hibernate