Java Developer/Technical Analyst

Infotree Global Solutions Inc.; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

Infotree Global Solutions Inc. is seeking a Java Technical Analyst in Warsaw, Poland, on a hybrid schedule (4 days onsite, 1 day remote).

The ideal candidate will dissect complex enterprise systems, analyze code, and deliver technical solutions for a large-scale Terminal Management System. You will work with developers, architects and business stakeholders to improve stability, performance and security while modernizing legacy applications and ensuring quality through automated tests and

Qualifications

• 4+ years of commercial Java development experience.
• Experience with large enterprise or legacy systems.
• Proven skills in technical analysis, software design, and system integration.
• Experience maintaining and modernizing existing applications.

Responsibilities

• Analyze business and technical requirements to design effective application solutions.
• Review documentation and translate requirements into technical implementations.
• Prepare and maintain comprehensive technical documentation.
• Perform reverse engineering of existing applications using sources and processes.
• Analyze legacy applications and recommend improvements.
• Implement enhancements within existing Java applications.
• Support modernization of legacy systems and upgrades.
• Design, develop, test components following engineering practices.
• Develop automated test cases and support quality initiatives.
• Participate in system integrations using REST APIs and messaging technologies.
• Collaborate with cross-functional teams to troubleshoot issues.
• Improve application performance, maintainability and security.
• Support continuous improvement of development processes and standards.

Skills

Analytical mindset

Problem-solving

Communication skills

Team collaboration

English proficiency

Tools

Java 8+

Spring

Spring Boot

Hibernate/JPA

JEE

REST APIs

RabbitMQ

Oracle SQL

JBoss/WildFly

Maven

Git

GitLab

GitLab CI/CD

Jenkins

Nexus

Jira

Reverse engineering

Job description

Job Specification – Java Technical Analyst

Role Overview

Position: Java Technical Analyst
Location: Warsaw, Poland (Hybrid – 4 days onsite / 1 day remote)

Position Summary

We are looking for an experienced Java Technical Analyst to join a business-critical FinTech project supporting the development and modernization of a large-scale Terminal Management System (TMS) managing over 300,000 payment terminals.

This role is ideal for someone who enjoys understanding complex enterprise systems, analyzing existing code, and delivering technical solutions within a legacy environment. You will work closely with developers, architects, analysts, and business stakeholders to enhance and modernize mission-critical applications while ensuring system stability, maintainability, and performance.

Key Responsibilities

Technical Analysis & Solution Design

• Analyze business and technical requirements to design effective application solutions.

• Review functional and analytical documentation and translate requirements into technical implementations.

• Prepare and maintain comprehensive technical documentation.

• Perform reverse engineering of existing applications using source code, technical documentation, databases, and business processes.

• Analyze legacy applications and recommend technical improvements.

Development & Modernization

• Implement enhancements and modifications within existing Java applications.

• Support technical upgrades and modernization of legacy systems.

• Design, develop, and test application components following best engineering practices.

• Develop automated test cases and support application quality initiatives.

Integration & System Support

• Participate in system integrations using REST APIs and messaging technologies.

• Collaborate with cross-functional teams to troubleshoot and resolve technical issues.

• Contribute to improving application performance, maintainability, and security.

• Support continuous improvement of development processes and technical standards.

Required Qualifications

Experience

• 4+ years of commercial experience with Java development.

• Experience working with large enterprise or legacy systems.

• Practical experience in technical analysis, software design, and system integration.

• Experience maintaining and modernizing existing applications.

Technical Skills

• Strong knowledge of Java 8+ and object-oriented programming.

• Hands‑on experience with Spring, Spring Boot, Hibernate/JPA, and JEE.

• Experience with RESTful APIs and distributed systems.

• Good understanding of RabbitMQ or similar messaging technologies.

• Experience with Oracle databases and SQL.

• Knowledge of application servers such as JBoss or WildFly.

• Familiarity with Maven, Git, GitLab, GitLab CI/CD, Jenkins, Nexus, and Jira.

• Experience creating technical documentation and working with reverse engineering activities.

Soft Skills

• Strong analytical and problem-solving mindset.

• Ability to understand complex business processes and legacy architectures.

• Excellent communication and stakeholder collaboration skills.

• Ability to work independently while contributing to a collaborative team environment.

• Good written and spoken English (B2 or higher).

Nice to Have

• Experience in FinTech, banking, or payment processing environments.

• Familiarity with distributed transactions and enterprise integration patterns.

• Experience with code quality and security scanning tools (e.g., Fortify, Sonatype).

• Exposure to legacy system modernization projects.

What Success Looks Like

• Delivering high-quality technical solutions for complex enterprise applications.

• Successfully analyzing and modernizing legacy code while maintaining system stability.

• Producing clear technical documentation and supporting knowledge sharing.

• Collaborating effectively with developers, architects, analysts, and business stakeholders.

• Contributing to the continuous evolution of a large-scale, mission-critical payment platform.