Java Integration Developer

Quick Facts

• Role: Java Integration Developer

• Project focus: Digital business transformation and development of integration services and APIs for a financial-sector organization

Description

You will design, implement, test, and maintain system-to-system integrations and APIs. The role includes building microservice-based solutions with both synchronous and asynchronous integration patterns, ensuring quality, security, availability, and performance. You will collaborate with architects, analysts, Product Owners, and project teams, and support engineering quality via code reviews and process automation.

Responsibilities

• Design, implement, test, and maintain inter-system integrations and APIs

• Develop solutions in a microservices architecture

• Build synchronous and asynchronous integrations

• Participate in technical decisions for how to implement integrations

• Ensure quality, security, availability, and performance of delivered solutions

• Collaborate with architects, analysts, Product Owners, and project teams

• Support estimation, planning, and technical risk analysis

• Perform code reviews and help define code-quality standards and production process automation

• Help the team troubleshoot technical issues and share best practices

Requirements

• Minimum 4 years of commercial Java development experience, including practical knowledge of Java 21+ and Spring Boot (Spring Cloud and Hibernate are a plus)

• Experience designing and securing APIs and inter-system integrations using REST, JSON, OpenAPI, OAuth 2.0, JWT, and SOAP with XML

• Practical experience building asynchronous integrations using message brokers such as Apache Kafka or RabbitMQ (or similar)

• Experience with API Management platforms for publishing and securing API gateways

• Experience creating and deploying microservices applications in Kubernetes

• Knowledge of relational databases (PostgreSQL or Oracle) and ability to optimize SQL queries

• Knowledge of CI/CD processes and tools (Bamboo/Jenkins, Git/Bitbucket, Jira) and writing unit tests

Benefits

• Long-term projects and job stability; opportunity to grow across different IT domains

• Flexible engagement models: B2B contract, employment contract, or contract work

• Benefits package: Medicover (including dentistry), FitProfit, English language lessons

• F45 gym trainings at the office

• Internal referral program

• Potential funding for IT certifications

• Depending on project: hybrid, remote, or on-site work

• Team events and integration trips

• Charity support and community involvement via #PomagamyNexio