Senior Java Software Engineer

ALTEN Polska; Warszawa; Hybrid; PLN 210,000 - 320,000; Full time

Benefits offered by this job

Medicover medical care

Medicover Benefits platform

Medicover Sport card

Referral Program

Layette for a newborn employee’s child

Group life insurance

B2B or Contract of Mandate options

Job summary

ALTEN Polska is seeking a Senior Software Developer to design and maintain microservices-based systems with Kafka in a hybrid Poland team.

The ideal candidate has 6-8 years in software development, strong Java/Spring expertise, and experience with cloud-friendly architectures. Advanced English and banking-sector exposure are a plus. We offer a stable, long-term role with career growth and relocation options.

Qualifications

• 6-8 years of software development experience with microservices and Kafka.
• Strong analytical skills for decomposing requirements and designing solutions.
• Proficiency in Java (preferably version 21, minimum 11), Spring Boot 3.4+, Spring Data JPA, and Spring Cloud Stream.
• Experience with Kafka, Avro, REST, Git, Jira, Confluence, Docker, Liquibase, and Hibernate.
• Advanced English proficiency.
• Higher education in a relevant field.
• Experience in the banking sector (2–5 years) is a plus.

Responsibilities

• Diagnosing and resolving system issues, including root cause analysis and documentation review.
• Supporting the development and maintenance of production systems.
• Planning team tasks and monitoring system performance.
• Communicating effectively with business stakeholders, maintenance teams, and development teams.
• Proactively identifying areas for improvement and driving innovation.
• Defining metrics and alerts for technical and business monitoring.
• Automating processes, including test creation and optimization.
• Conducting code reviews and updating technical and business documentation.
• Overseeing vulnerability management and security compliance.
• Onboarding and mentoring team members.
• Developing new functionalities and enhancing existing ones in alignment with business requirements.
• Participating in the full Agile lifecycle of user stories.

Skills

Microservices

Kafka

Java

Spring Boot

Cloud

English

Education

Higher education

Tools

Git

Jira

Confluence

Docker

Liquibase

Hibernate

Avro

Job description

WE ARE A WORLD LEADER IN ENGINEERING AND IT SERVICES.

At ALTEN, we see our specialists as architects – today’s designers of tomorrow’s world.

As a leader in Engineering and IT Services, we support companies in their technological and sustainable transformation.

OVER 57,400 EMPLOYEES IN 30+ COUNTRIES, TO SUPPORT MORE THAN 6,500 CLIENTS WORLDWIDE.

We operate in all sectors:

• Aeronautics, Space, Defence, Security & Naval
• Automotive, Rail & Mobility
• Energy & Environment
• Life Sciences & Health
• Telecoms, Banking, Finance & Insurance
• Public Services & Government

We carry out complex and highly technical projects throughout the value chain of the most prestigious companies worldwide.

Building Tomorrow’s World Today!

WE ARE LOOKING FOR: SENIOR SOFTWARE DEVELOPER

We seek a Senior Software Developer with strong expertise in microservices architecture, Kafka-based systems, and cloud-ready solutions. The ideal candidate brings a technical and analytical background in:

• Designing, developing, and maintaining microservices-based systems
• Collaborating with architects and cross-functional teams
• Analyzing business processes and technical documentation
• Implementing monitoring, automation, and security best practices

You will play a key role in:

• Diagnosing and resolving system issues, including root cause analysis and documentation review
• Supporting the development and maintenance of production systems
• Planning team tasks and monitoring system performance
• Communicating effectively with business stakeholders, maintenance teams, and development teams
• Proactively identifying areas for improvement and driving innovation
• Defining metrics and alerts for technical and business monitoring
• Automating processes, including test creation and optimization
• Conducting code reviews and updating technical and business documentation
• Overseeing vulnerability management and security compliance
• Onboarding and mentoring team members
• Developing new functionalities and enhancing existing ones in alignment with business requirements
• Participating in the full Agile lifecycle of user stories

The ideal candidate will have:

• 6-8 years of experience in software development, with a focus on microservices and Kafka
• Strong analytical skills for decomposing requirements and designing solutions
• Proficiency in Java (preferably version 21, minimum 11), Spring Boot 3.4+, Spring Data JPA, and Spring Cloud Stream
• Experience with Kafka, Avro, REST, Git, Jira, Confluence, Docker, Liquibase, and Hibernate
• Advanced English proficiency
• Higher education in a relevant field
• Experience in the banking sector (2–5 years) is a plus

WE OFFER:

• Work model: Hybrid (6 days per month in the office)
• Stable and long-term cooperation
• Well-defined career path at the European leader in engineering & IT consulting
• Opportunity to relocate and work in different ALTEN Polska branches
• After project completion, opportunity to engage in subsequent projects within the company
• Introduction and cooperation with a dedicated Competences Manager

BENEFITS:

• Medicover medical care
• Medicover Benefits platform
• Medicover Sport card
• Referral Program
• Layette for a newborn employee’s child
• Group life insurance
• Option for B2B or Contract of Mandate (UZ) cooperation

WE ALSO GUARANTEE:

• Access to professional certifications with our technology partners (e.g., Google, ISTQB)
• Access to relevant industry events
• Access to the Knowledge Sharing Program
• Access to the Referral Program

NOTICE:

We kindly inform you that we will contact the selected candidates.