Java Developer (Middle / Middle+ / Senior) at CRT · Web3Vacancy
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Java Developer (Middle / Middle+ / Senior)

Remote
Market range (est.) $90k–$180k
◆ 6/10 techBackend Developerremote
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About this role

CRT is looking for a Java Developer (Middle/Senior) to work on microservices and REST APIs. Remote position with a focus on Java, Spring Boot, and PostgreSQL.

Description

CRT is looking for a Java Developer (Middle/Senior) to work on microservices and REST APIs. Remote position with a focus on Java, Spring Boot, and PostgreSQL.

Responsibilities

Responsibilities

  • Develop microservices using Java and Spring Boot
  • Design REST APIs and integrations with external systems
  • Work with PostgreSQL, design schemas, and optimize SQL queries
  • Refactor existing code, including legacy components
  • Use Kafka or RabbitMQ for message exchange
  • Write unit and integration tests, conduct code reviews
  • Participate in architectural discussions, task decomposition, and estimation
  • Work in Agile/Scrum with analysts, testers, and DevOps
Requirements

Requirements

  • Commercial development experience in Java for 3 years for Middle and 6 years for Senior
  • Strong knowledge of Java 8, 11, or 17 and Spring Boot, Data, Security, MVC
  • Experience in developing microservices and REST APIs
  • Proficient with PostgreSQL and SQL, including query optimization
  • Knowledge of Kafka or RabbitMQ
  • Skills in Docker, Kubernetes, Git, and CI/CD
  • Writing unit tests with JUnit and Mockito
  • Understanding of OOP, SOLID, and clean code principles
  • Ability to decompose tasks, estimate effort, and technical risks
  • Plus: Experience in banking, fintech, insurance, or industrial projects
  • Knowledge of Kotlin
  • Experience with MongoDB or Redis
  • Familiarity with Prometheus, Grafana, ELK, or Elasticsearch
  • Use of Camunda, Liquibase, or Flyway
  • Development of high-load systems
  • English at the level of reading technical documentation
Conditions & Benefits

Conditions

  • Part-time work
  • Contract with an individual entrepreneur
  • Schedule: 5/2
  • Remote work
Job Details
Market range (est.)$90k–$180k
LocationRemote
AI Score★★★★★★☆☆☆☆ 6/10
PostedSep 30, 2026 (12d ago)
Tags & Skills
techBackend Developerremote
Tech Stack
JavaSpring BootPostgreSQLSQLKafkaRabbitMQDockerKubernetesGitCI/CDJUnitMockito
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✓ Direct apply: you message the hiring person. No ATS.

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