Stanislav Perminov

Backend • Intern • Riga, Latvia • UTC+02:00 • Fully remote • Work permits: Latvia • English: B2 • Available in 2 weeks • from $120k per year

Java Developer

8+ years exp

Java

Active 1 day ago

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Overview

Technical skills

Timeline

Roles

Overview

Java backend developer (early-career) focused on coursework and many small end-to-end console and classroom-style projects. The strongest proven skill is implementing object-oriented designs and a simple controller-service-repository layering, evidenced by files such as backEndCourse/vacationTasks/miniProjects/employeesManagement/service/EmployeeService.java and backEndCourse/vacationTasks/miniProjects/employeesManagement/repository/EmployeeRepository.java. There is little or no evidence of production REST APIs, database migrations, distributed systems, or security/auth infrastructure in public code.

Technical skills

Java• Staff • 8y+

Java

Flyway

MapStruct

Micrometer

Spring Data JPA

Spring Security

Spring Boot• 8y+

Liquibase• 8y+

Testcontainers• 8y+

Databases

PostgreSQL• 8y+

Apache Kafka• 4y+

Redis• 4y+

DevOps

Rest API

Docker• 8y+

Grafana• 4y+

OpenTelemetry• 4y+

Prometheus• 4y+

AI/ML

Claude

Claude Code

Mobile

JUnit

Cybersecurity

Keycloak• 4y+

Timeline

Java Backend Developer (Project Lead) • Lead

PC Expert SIA • Full-Time

Jan 2022 to Present 4 Years 8 Months Riga In office

Led backend development for a banking investment audit dashboard, aggregating client, KYC/AML, custody, market data and transactions into read-heavy views. Built event-driven portfolio read models and aggregates, plus configurable alerting for unallocated cash after corporate actions. Implemented resilient Kafka event validation with quarantine and dead-letter handling, and added observability with OpenTelemetry, Prometheus/Grafana and OpenSearch. Developed reusable service authorization/caching patterns using Redis and Keycloak-backed token flows.

Java

Spring Boot

PostgreSQL

Redis

Apache Kafka

Keycloak

OpenTelemetry

Prometheus

Grafana

ElasticSearch

Docker

Kubernetes

Java Backend Developer / Software Engineer • Middle

1 Self-Employed (Java Consultant) • Full-Time

Jan 2018 to Jan 2022 4 Years Riga In office

Provided backend consulting for banks focused on management analytics and regulatory reporting. Designed a safe extraction approach using a read replica to offload heavy analytical calculations from the operational core banking system. Implemented snapshot-based analytical marts with idempotent end-of-day processing, REST APIs for report dimensions, and reconciliation checks to detect inconsistencies before publishing.

Javasince 2018

Spring Bootsince 2018

PostgreSQLsince 2018

Liquibase

Dockersince 2018

Kubernetessince 2018

Testcontainers

Intern Backend Developer Confidence: Medium Generalist

API Design

2/10

How well APIs are designed

Basic layered controller/service naming is present but no REST/API contracts, versioning, idempotency, or pagination strategies are implemented.

Evidence

backEndCourse/vacationTasks/miniProjects/employeesManagement/controller/EmployeeController.java

backEndCourse/summarySessions/summary01/TeaStore/controller/TeaController.java

Data Layer & Database

2/10

Working with databases

Uses in-memory repositories and simple collections; no database migrations, SQL tuning, or transaction/isolation control are evidenced.

Evidence

backEndCourse/vacationTasks/miniProjects/employeesManagement/repository/EmployeeRepository.java

javaBasicCourse/lesson20/taskVar4/BookRepository.java

Scalability & Performance

1/10

Handling load and speed

No production-focused scalability patterns are present; only basic threading exercises and no evidence of caching, queueing, or load-tested optimizations.

Evidence

backEndCourse/lesson21/task01/HelloThread.java

backEndCourse/lesson21/task02/SumThread.java

System Architecture

2/10

Overall system structure

Simple modularization and classic controller-service-repository layering for CLI apps is shown, but no deliberate service decomposition, inter-service contracts, or config/secret management are present.

Evidence

backEndCourse/summarySessions/summary01/TeaStore/service/TeaService.java

backEndCourse/vacationTasks/miniProjects/employeesManagement/service/EmployeeService.java

Security & Auth

1/10

Protecting data and access

Minimal security posture; no auth/authz, token handling, or input-sanitization frameworks are used beyond simple user input helpers and a custom exception.

Evidence

utils/UserInputStatic.java

backEndCourse/lesson15/task05/NegativeNumberException.java

Reliability & Observability

2/10

Stability and monitoring

Some unit tests exist and there are small custom exceptions, but there is no evidence of structured logging, metrics, retries/backoff, or graceful shutdown patterns.

Evidence

test/java/lesson21/task1EvenNumbers/EvenNumbersTest.java

test/java/lesson22/service/ProductServiceTest.java

Expertise

Java• Intern

Technologies

Rest API

Spring Boot• 8y+

Apache Kafka• 4y+

Recommendations

Build small REST services with JDBC or JPA backing and include migration scripts so you can demonstrate DB schema evolution and transactions.
Package one CLI project as a testable service with unit tests, structured logging and timeouts to show reliability practices.
Work on a small microservice that includes API contracts, basic auth and input validation to demonstrate production API design and security hygiene.

Repositories

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

HomeWorks050525