Senior Java Developer (K/M)

Nasze wymagania:
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.
Good communication skills and the ability to work in a team.
Responsibility for delivered solutions and a proactive approach to problem-solving.

Mile widziane:
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.

O projekcie:
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

Zakres obowiązków:
Designing and developing efficient, scalable, and stable software.
Participating in the design and implementation of new features.
Supporting technical decision-making and selecting appropriate technologies and implementation approaches.
Working on the optimisation of the software development process.
Analysing technical requirements and proposing practical, maintainable solutions.
Supporting integration design between POS, BackOffice, payment systems, fiscal devices, external platforms, and other retail systems.
Taking ownership of complex technical topics and supporting the team in solving architectural or implementation challenges.
Cooperating with developers, analysts, testers, product owners, and other stakeholders.
Reviewing code and supporting good engineering practices within the team.

Oferujemy:
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