Senior Java Developer K/M, REMOTE WARSZAWA

Requirements

• At least 5 years of commercial experience in IT.
• Very good knowledge of Java.
• Experience with Spring Boot, Spring Cloud, JPA, and SQL.
• Good understanding of backend application design and system integration.
• Experience in designing stable, maintainable, and scalable solutions.
• Ability to analyse business and technical requirements and translate them into clean technical solutions.
• Experience with relational databases and query optimisation.
• Practical knowledge of Git-based version control.
• English at B2 level or higher.
• Ability to write, understand, review, and maintain code independently, without relying on LLM-based tools - we do allow and encourage you use all kinds of tools, including AI, but we expect you to have a deep understanding of the results
• Good communication skills and the ability to work in a team.
• Responsibility for delivered solutions and a proactive approach to problem-solving.

Nice to have

• Experience as a Tech Lead, Lead Developer, or Solution Architect.
• Experience in making or supporting architectural decisions.
• Experience with POS, retail, payments, fiscalisation, or enterprise sales systems.
• Experience with desktop applications or applications running in store environments.
• Knowledge of multithreading, performance optimisation, and offline-first systems.
• Awareness of web technologies
• Experience with CI/CD, GitLab pipelines, automated testing, or deployment processes.

We are looking for experienced Java Developers who want to grow their skills and work on interesting projects in the retail and sales technology area.
You will be joining a team working on POS and BackOffice solutions supporting sales, store operations, integrations, reporting, payments, fiscalisation, and other retail-related processes.

Technologies we use

POS

• Java
• Multithreading
• Plain JDBC
• Web client used in integrations
• Swing for UI
• SQLite embedded database

BackOffice

• Java 21
• Spring JDBC
• Tomcat as a web application container
• Apache Wicket
• PostgreSQL
• JasperReports
• Karate

We offer:

• Employment in a reputable organization (ITwiz BEST100), operating in accordance with international quality and security standards (ISO 9001, ISO 27001)
• A non-corporate atmosphere and a flat organizational structure
• Opportunities for continuous development through:
• working with a variety of technologies on projects for well-known clients
• collaboration with an experienced team of experts who are eager to share their knowledge
• co-financing of training and certifications
• Employee Referral Program
• Participation in charitable initiatives, including cooperation with the Joanna Radziwiłł Foundation “Opiekuńcze Skrzydła” and involvement in the “Gwiazdorzymy” holiday campaign
• A diverse and inclusive work environment – our company brings together representatives of four generations
• Equal development opportunities – 50% of managerial and leadership positions are held by women
• Organizational culture based on values:
• we act with good intentions
• we share knowledge
• we take responsibility
• we continuously improve people are our top priority
• we act with a clear sense of purpose and meaning
• we communicate honestly and professionally