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Александр Фефилов

@0006751

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Kotlin backend developer at Alfa-Bank who improved image processing time by about 9%.

Serbia

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At Alfa-Bank, I designed and presented architecture for application customization across the company's microservices, and built a service for managers to configure settings by user segment.

I analyzed service requests and optimized data access and image processing across services, improving processing time by about 9%.

At MTS Digital, I redesigned content licensing updates to use Kafka events instead of synchronous calls, addressing storefront delays and desynchronization. I also optimized content preparation and helped unify analytics and logging across services.

Earlier, I worked on financial projects at Integrity Solutions and contributed to data streaming, telecom billing analytics, and Java and Spring microservices at Nexign and Sberbank-Technology.

Experience

Work history, roles, and key accomplishments

Current

Kotlin backend developer

Current

Alfa-Bank

Feb 2024 - Present (2 years 8 months)

- Designed and presented the architecture for implementing application customization functionality within the company's microservices architecture (200+ microservices). Built a service enabling managers to configure customization settings (package availability by user segment).

- Actively participated in team and cross-team meetings to discuss and resolve architectural and technical issues. For

Java Software Developer

MTS Digital

Jun 2022 - Jan 2024 (1 year 7 months)

- Redesigned inter-service communication architecture for the content "licensing window" change functionality: replaced synchronous calls with an event-driven approach via Kafka, eliminating delays and desynchronization of the client-facing storefront during licensing window updates.

- Optimized the content preparation pipeline for display (licensing window checks, availability checks, cache war

Java Software Engineer

Integrity Solutions

Nov 2020 - Jun 2022 (1 year 7 months)

- Worked on financial projects, developing and managing customer-facing components across multiple projects.

- Integrated and enhanced a software encryption system deployed in production environment.

Full Stack Software Engineer

Nexign

Feb 2019 - Nov 2020 (1 year 9 months)

- Participated in the development of multiple services for data streaming configuration and management.

- Developed a system for capturing analytics data for the billing system of a telecom operator.

Full Stack Software Engineer

Sberbank-Technology

Sep 2016 - Jan 2019 (2 years 4 months)

- Participated in design and development backend services using Java and Spring within a microservice architecture.
- Built and maintained REST APIs and contributed to the React-based frontend for internal management applications.
- Contributed to DevOps activities, performed Linux system administration tasks, make a migration from Tomcat to Wildfly, and troubleshot deployment issues in test and