JVM Software Engineer Job at Inetum (Warsaw)

Senior Software Engineer - Data Integration & JVM Ecosystem

The Connectors team is the bridge between ClickHouse and the entire data ecosyst...

Location

Germany

Salary:

Not provided

ClickHouse

Expiration Date

Until further notice

Requirements

6+ years of software development experience focusing on building and delivering high-quality, data-intensive solutions
Proven experience with the internals of at least one of the following technologies: Apache Spark, Apache Flink, Kafka Connect, or Apache Beam
Experience developing or extending connectors, sinks, or sources for at least one big data processing framework such as Apache Spark, Flink, Beam, or Kafka Connect
Strong understanding of database fundamentals: SQL, data modeling, query optimization, and familiarity with OLAP/analytical databases
A track record of building scalable data integration systems (beyond simple ETL jobs)
Strong proficiency in Java and the JVM ecosystem, including deep knowledge of memory management, garbage collection tuning, and performance profiling
Solid experience with concurrent programming in Java, including threads, executors, and reactive or asynchronous patterns
Outstanding written and verbal communication skills to collaborate effectively within the team and across engineering functions
Understanding of JDBC, network protocols (TCP/IP, HTTP), and techniques for optimizing data throughput over the wire
Passion for open-source development

Job Responsibility

Own and maintain critical parts of ClickHouse's Data engineering ecosystem
Own the full lifecycle of data framework integrations - from the core database driver to SDKs and connectors
Build the foundation that thousands of Data engineers rely on for their most critical data workloads
Collaborate closely with the open-source community, internal teams, and enterprise users to ensure our JVM integrations set the standard for performance, reliability, and developer experience

What we offer

Flexible work environment - ClickHouse is a globally distributed company and remote-friendly
Healthcare - Employer contributions towards your healthcare
Equity in the company - Every new team member who joins our company receives stock options
Time off - Flexible time off in the US, generous entitlement in other countries
A $500 Home office setup if you’re a remote employee
Global Gatherings – opportunities to engage with colleagues at company-wide offsites

Senior Software Engineer - Data Integration & JVM Ecosystem

The Connectors team is the bridge between ClickHouse and the entire data ecosyst...

Location

United Kingdom

Salary:

Not provided

ClickHouse

Expiration Date

Until further notice

Requirements

6+ years of software development experience focusing on building and delivering high-quality, data-intensive solutions
Proven experience with the internals of at least one of the following technologies: Apache Spark, Apache Flink, Kafka Connect, or Apache Beam
Experience developing or extending connectors, sinks, or sources for at least one big data processing framework such as Apache Spark, Flink, Beam, or Kafka Connect
Strong understanding of database fundamentals: SQL, data modeling, query optimization, and familiarity with OLAP/analytical databases
A track record of building scalable data integration systems (beyond simple ETL jobs)
Strong proficiency in Java and the JVM ecosystem, including deep knowledge of memory management, garbage collection tuning, and performance profiling
Solid experience with concurrent programming in Java, including threads, executors, and reactive or asynchronous patterns
Outstanding written and verbal communication skills to collaborate effectively within the team and across engineering functions
Understanding of JDBC, network protocols (TCP/IP, HTTP), and techniques for optimizing data throughput over the wire
Passion for open-source development

Job Responsibility

Serve as a core contributor, owning and maintaining critical parts of ClickHouse's Data engineering ecosystem
Own the full lifecycle of data framework integrations - from the core database driver that handles billions of records per second, to SDKs and connectors that make ClickHouse feel native in JVM-based applications
Build the foundation that thousands of Data engineers rely on for their most critical data workloads
Collaborate closely with the open-source community, internal teams, and enterprise users to ensure our JVM integrations set the standard for performance, reliability, and developer experience

What we offer

Flexible work environment - ClickHouse is a globally distributed company and remote-friendly. We currently operate in 20 countries
Healthcare - Employer contributions towards your healthcare
Equity in the company - Every new team member who joins our company receives stock options
Time off - Flexible time off in the US, generous entitlement in other countries
A $500 Home office setup if you’re a remote employee
Global Gatherings – We believe in the power of in-person connection and offer opportunities to engage with colleagues at company-wide offsites

Fulltime

JVM Software Engineer

Join our Migration Factory team working on modernization initiatives for a leadi...

Location

Poland , Warsaw

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Strong experience with Java
Strong experience with Spring Boot
Strong experience with PostgreSQL
Excellent communication skills
Proactive and solution-oriented mindset

Job Responsibility

Develop and maintain backend solutions using JVM technologies
Collaborate on modernization projects
Ensure smooth migration and system optimization
Work closely with cross-functional teams to deliver high-quality solutions

What we offer

Flexible working hours
Hybrid work model
Cafeteria system
Referral bonuses up to PLN6,000
Additional revenue sharing opportunities
Ongoing guidance from dedicated Team Manager
Tailored technical mentoring
Team-building budget
Participation in charitable initiatives
Participation in local sports programs

Fulltime

Junior JVM Software Engineer

Junior JVM Software Engineer position focusing on migration from monolith JBoss ...

Location

Poland , Warsaw

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Java >21
REST
SPRING
Unit- and Integrations-Tests (Mockito, Testcontainers, JUnit 5)
Git
Swagger
IntelliJ

Job Responsibility

Migration logic from a monolith (JBoss 4) to a domain driven architecture with Spring Boot components

What we offer

Flexible working hours
Hybrid work model
Cafeteria system
Referral bonuses up to PLN6,000
Team-building budget
Participation in charitable initiatives and local sports programs
Training and certifications funding
Conference participation funding

Fulltime

Senior JVM Software Engineer

The project is centered around order management, providing and maintaining multi...

Location

Poland , Poznań

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Spring boot 3.x
Java 17+
JPA/Hibernate
OpenAPI
SQL
PostgreSQL
GIT
Maven
Docker
Kubernetes

Job Responsibility

Provide and maintain multiple integration interfaces
Rewrite and migrate solutions from JBoss/WildFly and Java 6/8 to Spring Boot and Java 21

What we offer

Flexible working hours
Hybrid work model
Cafeteria system
Referral bonuses
Revenue sharing opportunities
Professional development
Team support
Team-building budget
Charitable initiatives
Local sports programs

Fulltime

JVM Software Engineer

Your task will be to develop services supporting the CX department and the conta...

Location

Poland , Poznań

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Solid experience in programming in Java or Kotlin
proficient in creating backend applications, managing databases, and implementing business logic
experience in creating frontend applications using React.

Job Responsibility

Develop services supporting the CX department and the contact process
collaborate on rebuilding the contact path with other technical teams
work and tasks related to the development of the contact form, support for CX processes, and the survey service.

What we offer

Flexible working hours
hybrid work model
cafeteria system for personalized benefits
referral bonuses up to PLN6,000
fully funded training, certifications, participation in technology conferences
team-building events
opportunities for charitable initiatives and local sports programs
inclusive and supportive work culture.

Fulltime

Junior JVM Software Engineer

Inetum Polska is seeking a Junior JVM Software Engineer to work on migration log...

Location

Poland , Warsaw

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Java >21
REST
SPRING
Unit- and Integrations-Tests (Mockito, Testcontainers, JUnit 5)
Git
Swagger
IntelliJ

Job Responsibility

Focusing on migration logic from a monolith (JBoss 4) to a domain driven architecture with Spring Boot components

What we offer

Flexible working hours
Hybrid work model
Cafeteria system for personalizing benefits
Generous referral bonuses
Dedicated team-building budget
Opportunities for charitable initiatives and local sports programs
Supportive and inclusive work culture

JVM Software Engineer

We're looking for a JVM Software Engineer to join our team. In this role, you'll...

Location

Poland , Warsaw

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Strong proficiency in Java (Spring Boot, Java Persistence API) with significant experience in microservices (multi-tenant) and SOA/cloud architectures
foundational understanding and practical experience with Docker, Kubernetes, Azure DevOps, Git, and SonarQube (user-level knowledge for development purposes)
experience with RESTful APIs and queue/event-based communication (e.g., RabbitMQ, Kafka, ActiveMQ, Azure Service Bus, or Azure IoT Hub)
familiarity with web services (REST, OpenAPI specification) and device protocols (HTTP)
understanding and practical application of OAuth and RBAC
experience with PostgreSQL, MongoDB, and Redis
proficiency in JUnit and Mockito
good command of technical and professional English
experience working within Agile methodologies (SCRUM)

Job Responsibility

Develop and configure IoT applications primarily based on the Cumulocity platform (Administration, Device Management, Cockpit)
design and implement software components that align with business needs, company standards, and security best practices
support and maintain existing IoT solutions, focusing on performance, scalability, and code quality
contribute to the implementation and maintenance of CI/CD pipelines
participate in software architecture design discussions, collaborating closely with architects
lead functional or technical scopes within the team, promoting best practices and fostering a culture of excellence
produce comprehensive technical documentation and actively share knowledge with the team
support the recruitment and onboarding of new developers

What we offer

Flexible working hours
hybrid work model, allowing employees to divide their time between home and modern offices in key Polish cities
a cafeteria system that allows employees to personalize benefits by choosing from a variety of options
generous referral bonuses, offering up to PLN6,000 for referring specialists
additional revenue sharing opportunities for initiating partnerships with new clients
ongoing guidance from a dedicated Team Manager for each employee
tailored technical mentoring from an assigned technical leader, depending on individual expertise and project needs
dedicated team-building budget for online and on-site team events
opportunities to participate in charitable initiatives and local sports programs
a supportive and inclusive work culture with an emphasis on diversity and mutual respect

Fulltime

JVM Software Engineer

Inetum

Location:
Poland , Warsaw ▼
Poznań
Lublin

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
November 13, 2025

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Lublin

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Job Posted:
November 13, 2025