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Alen Shagapov

@alenshagapov

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Java Backend Developer with 6+ years of experience in microservices.

Kazakhstan

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What I'm looking for

I am seeking a role that fosters innovation and allows me to leverage my skills in microservices and backend development while contributing to impactful projects.

I am a Java Backend Developer with over 6 years of experience specializing in building distributed systems and scalable microservices, particularly within the banking and telecom sectors. My expertise lies in optimizing infrastructure, minimizing downtime, and implementing asynchronous messaging using Kafka. I am fluent in Java (versions 8-21+) and have a strong command of Spring Boot (2/3) and reactive architectures.

Throughout my career, I have achieved significant milestones, including leading a comprehensive migration to microservices that reduced system downtime by 60% and operational costs by 50%. One of my proudest accomplishments was developing the Kaspi Dialer, an automated debt collection service that generated over $5 million in revenue for my company. I am committed to enhancing service performance, having successfully accelerated response times by 30% through the implementation of Webflux and asynchronous programming.

Experience

Work history, roles, and key accomplishments

Current

Java Developer

Current

Tele2

Sep 2024 - Present (11 months)

Built high-performance microservices in Spring Boot 3 and WebFlux for telecom systems. Improved system fault tolerance by 20% by implementing Circuit Breaker.

Spring Boot Webflux Microservices Java

Java Developer

Bereke Bank

Jun 2022 - Present (3 years 2 months)

Migrated core banking modules to microservices, reducing outages and improving resilience. Integrated Spring Cloud tools to streamline development and reduce production failures.

Microservices Spring Cloud Java

Java Developer

Sberbank KZ

Oct 2021 - Present (3 years 10 months)

Developed enterprise service bus (ESB) connectors and adapters in a microservices environment. Refactored REST services to enable reactive architecture and improve latency by 50%.

Microservices REST Kafka Java

Software Developer

Kaspi

Nov 2020 - Present (4 years 9 months)

Delivered $5M+ revenue by designing and deploying Kaspi Dialer – an automated debt collection platform. Developed secure backend layers using gRPC and REST for inter-service communication.

gRPC REST Backend Development Debt Collection System Design Java

Java Developer

Halyk Insurance

Aug 2019 - Present (6 years)

Boosted operational efficiency by 30% through optimization of business logic and database design. Refactored and migrated 60% of legacy .NET codebase to Java 8+, modernizing core systems.

Database Design .NET To Java Migration Java 8