Ilias Safin

Backend • Senior

Backend Developer

Java

Kotlin

SQL

Data Layer & Database: 7/10

Reliability & Observability: 7/10

API Design: 6/10

Active 2 days ago

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Overview

Technical skills

Roles

Overview

Senior backend engineer focused on reliable, transactional distributed processing and messaging for notification and reminder workflows. The strongest proven skill is designing and testing transactional outbox and delivery pipelines as shown in TransactionalReminderScheduledEventOutboxPorts.java and ReminderOutboxIntegrationTest.java. There is limited public evidence of cloud operations automation such as Kubernetes operators, infrastructure-as-code pipelines or extensive production runbook/CI artifacts.

Phone

Technical skills

Languages

Java

Kotlin

SQL

Java

Spring Boot

Testcontainers

Spring Data JPA

SLF4J

Jackson

Spring MVC

Micrometer

Other

GORM

Mockito

Apache Kafka

PostgreSQL

GitHub

GitHub Actions

Grafana

Rest API

Docker

Git

Linux

Prometheus

Docker Compose

Senior Backend Developer Confidence: High Distributed Systems

API Design

6/10

How well APIs are designed

Consistent REST controllers, DTO validation, global exception handling and pagination indicate deliberate API design with a stable error contract and validation surface.

Evidence

xorl-ldaf/ToDo-DevOps/adapters/in/web-rest/src/main/java/com/example/todo/adapter/in/web/controller/TaskController.java xorl-ldaf/ToDo-DevOps/adapters/in/web-rest/src/main/java/com/example/todo/adapter/in/web/advice/GlobalExceptionHandler.java xorl-ldaf/ToDo-DevOps/adapters/in/web-rest/src/main/java/com/example/todo/adapter/in/web/dto/PageResponse.java

Data Layer & Database

7/10

Working with databases

Clear transactional boundaries, outbox pattern and DB-level concurrency handling with tests verifying skip-locked semantics and Flyway migration integration show careful data layer and schema management.

Evidence

xorl-ldaf/ToDo-DevOps/apps/web-app/src/main/java/com/example/todo/config/TransactionalReminderScheduledEventOutboxPorts.java xorl-ldaf/ToDo-DevOps/apps/web-app/src/test/java/com/example/todo/ReminderOutboxIntegrationTest.java xorl-ldaf/ToDo-DevOps/apps/web-app/src/test/java/com/example/todo/FlywayMigrationIntegrationTest.java

Scalability & Performance

6/10

Handling load and speed

Kafka-based outbox, worker schedulers, batch sizes and concurrency tests for parallel scanners and relays provide real evidence of scaling considerations and safe concurrent processing.

Evidence

xorl-ldaf/ToDo-DevOps/apps/web-app/src/main/java/com/example/todo/config/KafkaConfig.java xorl-ldaf/ToDo-DevOps/apps/web-app/src/test/java/com/example/todo/ReminderDeliveryProcessingIntegrationTest.java xorl-ldaf/go_pet_project/tests/integration/outbox_test.go

System Architecture

6/10

Overall system structure

Hexagonal/ports-and-adapters structure, explicit bean wiring, layered architecture tests and modular packaging show deliberate service decomposition and clear module boundaries.

Evidence

xorl-ldaf/ToDo-DevOps/apps/web-app/src/main/java/com/example/todo/config/BeanConfig.java xorl-ldaf/ToDo-DevOps/core/application/src/main/java/com/example/todo/application/port/in/CreateTaskUseCase.java xorl-ldaf/ToDo-DevOps/apps/web-app/src/test/java/com/example/todo/ArchitectureTest.java

Security & Auth

6/10

Protecting data and access

Authentication, JWT/refresh handling in the Go service plus validation and centralized error mapping in Java indicate security awareness at input boundaries and token lifecycle handling.

Evidence

xorl-ldaf/go_pet_project/internal/auth/application/service/auth_service_test.go xorl-ldaf/go_pet_project/internal/auth/adapter/in/http/middleware_test.go xorl-ldaf/ToDo-DevOps/adapters/in/web-rest/src/main/java/com/example/todo/adapter/in/web/advice/GlobalExceptionHandler.java

Reliability & Observability

7/10

Stability and monitoring

Structured tests for retry/backoff, delivery retry policy, transaction isolation checks and Micrometer hooks show attention to reliability and observability with meaningful test coverage.

Evidence

xorl-ldaf/go_pet_project/internal/notification/application/service/telegram_service_test.go xorl-ldaf/ToDo-DevOps/core/application/src/main/java/com/example/todo/application/outbox/OutboxPublicationPolicy.java xorl-ldaf/ToDo-DevOps/internal/platform/metrics/metrics.go

Verified artifacts

biqiboqi/ProbabilityTheoryModeling• ★ 2 DashaKlimenteva/history• contrib

Expertise

Go Development• Middle

Java• Middle

Messaging & Real-time• Senior

Microservices & API Architecture• Senior

System Architecture• Middle

Technologies

Go• Senior

Java• Senior

Kotlin• Senior

Rest API

Jackson

Spring Boot

GORM

Mockito

Apache Kafka

Spring MVC

Spring Data JPA

SLF4J

Testcontainers

Micrometer

Recommendations

Design and implement Kafka-backed outbox relays, delivery runners and worker schedulers for reliable event delivery.
Build Postgres-backed transactional workflows with skip-locked claim patterns and short transactions around critical DB operations.
Develop background processing components with thorough integration tests and Testcontainers-based pipelines to validate concurrency and failure modes.
Implement API endpoints with strong validation, consistent error contracts and thorough controller-level tests.

Repositories

The developer's experience in this domain has been verified based on AI analysis of the following repositories:

ToDo-DevOps go_pet_project