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Dmitrii Iamanko

@dmitriiiamanko

Java backend developer at IT_One who cut bank-portal request search to 200–300 ms and automated recovery for failed workflow steps.

Georgia

Message

At IT_One, I worked on a bank-wide service portal for about 30,000 employees. I rewrote request search using optimized PostgreSQL queries and indexes, cutting search time from about 1–2 seconds to 200–300 ms.

I also built a PostgreSQL-backed retry queue for failed workflow steps. It now recovers an estimated 25–30% of daily failures without an admin, and I took BPMN generation from a feasibility study to production, reducing design time per process from 1–2 days to about 2 hours.

Before IT_One, I was development lead on a supermarket chain's loyalty program at Astelit. I built its 1C integration service from scratch and worked on ClickHouse analytics and migration to a new bonus processing system.

Experience

Work history, roles, and key accomplishments

Java Developer

IT_One

Nov 2023 - Oct 2026 (2 years 11 months)

Developed and maintained a bank-wide internal service portal for ~30,000 employees, improving search performance and building fault-tolerant workflow recovery. Owned incident recovery and workflow tooling end to end, and reviewed code in a 20+ person team.

Java 21+Spring Boot 3.5 PostgreSQL Liquibase Kafka Redis Camunda Shedlock MapStruct Docker TeamCity Gitlab CI Nexus Grafana Prometheus Vue2 Dify

Software Engineer (Java Backend)

Astelit

Aug 2020 - Sep 2023 (3 years 1 month)

Developed Spring Boot backends for a supermarket chain's loyalty program and an electronic document management system, leading the loyalty program development. Built integrations with 1C, ClickHouse analytics, and a new bonus processing system, and introduced CI/CD and monitoring.