Open to opportunities

Hackim Хакимуллин

@hackim

Message

I build resilient Java services for high-volume government and banking integrations.

Armenia

Message

What I'm looking for

I'm looking for backend work where I can solve end-to-end business problems, build reliable high-load integrations, improve legacy systems, and collaborate closely with analysts and QA on production-ready solutions.

At Liga Digital Economy, I develop and support SMEV3/SMEV4 integrations with federal-scale systems handling up to 50 million requests daily. I restored a service after an incident involving approximately 130,000 lost banking requests by identifying broker lag and faulty expired-message processing.

I maintain around 30 microservices for the Ministry of Internal Affairs, address CVEs and technical debt, and refactored legacy services into isolated modules using Strategy, Facade, Adapter, composition, and SOLID principles—helping the team ship features twice as fast.

Previously at Micord, I built an enhanced qualified electronic signature service for PDF contracts, integrated XWiki into a Docker environment adopted across Federal Tax Service branches, and delivered REST, PostgreSQL, and Kafka-based services. I focus on understanding the full business and data flow before implementing production-ready solutions.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer (Java)

Current

Liga Tsifrovoy Ekonomiki

Nov 2025 - Present (9 months)

Develops and maintains integrations with federal systems SMEV3 and SMEV4 handling up to 50 million requests daily. Recovered a service after an incident losing ~130,000 bank requests and refactored legacy services to speed up feature delivery by 2x.

Java Spring Boot Hibernate PostgreSQL MySQL Liquibase Docker S3 Maven Mockito Prometheus Grafana Kafka Microservices Security

Full-stack Developer (Java, TypeScript)

Micord

Aug 2024 - Oct 2025 (1 year 2 months)

Designed and implemented a service for generating and verifying enhanced qualified electronic signatures (UKEP) in PDF documents, integrating it into the platform. Integrated XWiki into a Docker environment and developed a PDF signing system on JasperReports.

Java Spring Framework Spring MVC Spring Data Maven Kafka PostgreSQL Angular TypeScript JavaScript Docker

Junior Backend Developer (Java)

ENRSOFT

Sep 2023 - May 2024 (8 months)

Developed and maintained server-side application components, analyzed and optimized application performance, and applied SOLID principles and design patterns. Conducted data migration from legacy systems to new storage.

Java Spring Framework Spring MVC Maven PostgreSQL Junit Mockito