Quick Summary
Ailleron is seeking a Lead Java Developer for a remote or Kraków-based role under a UOP or B2B contract to design and develop scalable backend systems for the financial sector. You will make key architectural decisions, design database architectures, and support the development team. Requirements include at least seven years of backend experience, with a minimum of two years in a senior or lead role, alongside expertise in high-concurrency systems, Java 21, Spring Boot 4.x, and PostgreSQL.
Technology Stack:
- Angular
- Javascript
- MySQL
- PHP
- Java
- PostgreSQL
- Spring
Lead Java Developer
We are looking for an experienced Lead Java Developer who will be responsible for designing and developing key backend components of a modern platform for the financial sector. If you like building scalable systems, making architectural decisions, and supporting the team in creating high-quality software – we invite you to cooperate.
In this position, you will have a real impact on the architecture of the solution, the development of business logic, and the technological direction of the project. We work agilely, using a modern technology stack and good engineering practices.
Key Responsibilities:
- Designing and developing efficient, scalable, and reliable backend systems.
- Creating database architecture and designing integration layers between systems.
- Planning and implementing secure data migration processes and changes in the server environment.
- Making key technical decisions and ensuring the quality, performance, and security of the developed software.
- Supporting the development team in solving complex technical problems and setting good programming practices and standards.
- Proposing architectural and technological improvements supporting further product development.
Required Skills & Experience:
- Minimum 7 years of experience in developing backend applications and systems.
- At least 2 years of experience as a Senior Java Developer, Lead Developer, or in a similar technical role.
- Very good knowledge of designing high-concurrency systems and applications using multi-threaded processing.
- Practical experience with Java 21 and the Spring Boot 4.x framework, including Spring Data JPA and Spring Security.
- Experience in designing database architecture using PostgreSQL and building integration layers.
- Ability to plan and implement secure data migrations and backend changes.
- Good knowledge of agile methodologies, such as Scrum or Agile.
- Ability to analyze complex technical problems and make accurate architectural decisions.
- Experience in projects for the financial sector or digital banking is welcome.
Location:
Krakow, Remote work
Form of Cooperation:
Employment contract (UOP) / B2B
Benefits:
- 80 hours for self-development
- Medical care with a conservative dentistry package, rehabilitation, and psychological support service
- Language classes during working hours
- Multisport with various options
- Life insurance tailored to your needs
- Access to the company library
- Wellbeing programs, integrations, and events