Java Software Engineer

Codilime; Warszawa; Hybrid; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Flexible working hours

Remote/hybrid options

Training budget

Job summary

Codilime is seeking a Java Software Engineer to join a strategic network automation initiative focused on accelerating onboarding of device features into an enterprise automation platform. You will transform XML/XPath-based feature definitions into maintainable Java implementations, and help evolve backend services.

Working with AI-powered tools, you will contribute to code generation, validation, testing, and performance improvements, collaborating with engineers, QA, and architects in an agile

Qualifications

• Minimum 5+ years of professional experience in Java software development.
• Experience with backend systems and API development.
• Knowledge of computer networks (switching, routing, VLANs, TCP/IP, DNS, DHCP).
• Experience using AI-assisted development tools or agentic AI workflows.
• Experience with cloud environments (AWS / Azure / GCP).
• Strong understanding of XML and XPath.
• Experience with REST-based services.
• Good analytical and problem-solving skills.
• Good communication skills and ability to work in an agile team.
• Good knowledge of English (B2+ level).

Responsibilities

• Working on backend development in Java within a network domain.
• Transforming network feature definitions based on XML/XPath into Java-based implementations.
• Building and extending backend services and APIs supporting automation workflows.
• Integrating AI agents into development and automation processes (AI-assisted code generation and validation).
• Ensuring code quality through unit and integration testing.
• Investigating and resolving bugs, performance issues, and scalability challenges.
• Collaborating with engineers, QA, and architects in an agile environment.
• Participating in code reviews and technical discussions.
• Supporting continuous improvement of development and automation processes.

Skills

Java

Backend services

API development

XML & XPath

Cloud platforms

RESTful services

English (B2+)

AI-assisted tools

Tools

CI/CD pipelines

Code generation tools

ReactJS

Job description

Get to know us better

CodiLime is a software and network engineering industry expert and the first-choice service partner for top global networking hardware providers, software providers and telecoms. We create proofs-of-concept, help our clients build new products, nurture existing ones and provide services in production environments. Our clients include both tech startups and big players in various industries and geographic locations (US, Japan, Israel, Europe).

While no longer a startup - we have 250+ people on board and have been operating since 2011 we’ve kept our people-oriented culture. Our values are simple:

• Act to deliver.

• Disrupt to grow.

• Team up to win.

The project and the team

We are looking for a Java Software Engineer to join a strategic network automation initiative focused on accelerating the onboarding of network device features into an enterprise automation platform.

The project involves transforming XML/XPath-based feature definitions into maintainable Java implementations, leveraging AI agents to automate and accelerate development workflows. The engineer will work on feature onboarding, backend service development, API integration, code generation, testing, troubleshooting, and scalability improvements.

A significant part of the role will involve collaborating with AI-powered development tools and agentic AI systems to generate, validate, and optimize code. The project combines software engineering, network automation, cloud-native technologies, and AI-assisted development practices.

Your role

As a part of the project team, you will be responsible for:

• Working on backend development in Java within a network domain

• Transforming network feature definitions based on XML/XPath into Java-based implementations

• Building and extending backend services and APIs supporting automation workflows

• Integrating AI agents into development and automation processes (AI-assisted code generation and validation)

• Ensuring code quality through unit and integration testing

• Investigating and resolving bugs, performance issues, and scalability challenges

• Collaborating with engineers, QA, and architects in an agile environment

• Participating in code reviews and technical discussions

• Supporting continuous improvement of development and automation processes

Do we have a match?

As a Java Software Engineer, you must meet the following criteria:

• Minimum 5+ years of professional experience in Java software development

• Experience working with backend systems and API development

• Knowledge of computer networks (switching, routing, VLANs, TCP/IP, DNS, DHCP)

• Experience using AI-assisted development tools or agentic AI workflows

• Experience with cloud environments (AWS / Azure / GCP)

• Strong understanding of XML and XPath

• Experience with REST-based services

• Good analytical and problem-solving skills

• Good communication skills and ability to work in an agile team

• Good knowledge of English (B2+ level)

Beyond the criteria above, we would appreciate the nice-to-haves:

• Professional experience working with Golang

• Experience with CI/CD pipelines

• Experience working in large-scale or distributed systems

• Knowledge of ReactJS or similar frontend frameworks

• Experience with code generation or model-driven development approaches

• Experience with performance tuning and scalability optimization

More reasons to join us

• Flexible working hours and approach to work: fully remotely, in the office or hybrid

• Professional growth supported by internal training sessions and a training budget

• Solid onboarding with a hands-on approach to give you an easy start

• A great atmosphere among professionals who are passionate about their work

• The ability to change the project you work on