Java developer

Studentwork Finland Oy; Helsinki; On-site; EUR 65,000 - 91,000; Full time

Job summary

CGI in Helsinki is seeking experienced Java Developers to join our team responsible for business-critical systems. You’ll be involved across the full application lifecycle, from development and testing to production support and continuous improvements.

You will work in an environment close to production and help ensure reliability for systems used by thousands of users every day. Strong Java, Spring Boot, REST API development and Finnish language skills are essential.

Qualifications

• Strong experience with Java backend development.
• Experience with Spring and/or Spring Boot.
• Experience developing REST APIs.
• Good SQL skills (SQL Server, PostgreSQL, Oracle or similar).
• Experience working with integrations.
• Experience maintaining business-critical production systems.
• Experience with production support, incident management or problem management.
• Experience writing unit, integration and API tests as part of the development process.
• Fluent Finnish language skills.

Responsibilities

• Developing backend applications using Java and Spring Boot.
• Designing, implementing and maintaining REST APIs and integrations.
• Maintaining and enhancing production systems.
• Investigating and resolving production incidents and technical issues.
• Writing and maintaining unit, integration and API tests.
• Contributing to test automation and continuous improvements.
• Working closely with business stakeholders and cross-functional teams.
• Supporting the full software lifecycle in a continuous services environment.

Skills

Java backend development

Spring/Spring Boot

REST APIs

SQL skills

Integrations

Production systems

Production support

Testing / test automation

Finnish language

Job description

Do you enjoy solving complex technical challenges in environments where reliability truly matters?

We're looking for experienced Java Developers to join CGI's team working with business‑critical systems. This is not a traditional project‑based development role—instead, you'll be involved throughout the entire application lifecycle, from development and testing to production support and continuous improvements.

This is an excellent opportunity for someone who enjoys working close to production environments and wants to make a real impact on systems that are critical to everyday business operations.

What you'll be doing

• Developing backend applications using Java and Spring Boot
• Designing, implementing and maintaining REST APIs and integrations
• Maintaining and enhancing production systems
• Investigating and resolving production incidents and technical issues
• Writing and maintaining unit, integration and API tests
• Contributing to test automation and continuous improvements
• Working closely with business stakeholders and cross‑functional teams
• Supporting the full software lifecycle in a continuous services environment

We're looking for someone with

• Strong experience with Java backend development
• Experience with Spring and/or Spring Boot
• Experience developing REST APIs
• Good SQL skills (SQL Server, PostgreSQL, Oracle or similar)
• Experience working with integrations
• Experience maintaining business‑critical production systems
• Experience with production support, incident management or problem management
• Experience writing unit, integration and API tests as part of the development process
• Fluent Finnish language skills

It's a plus if you also have experience with

• Test automation, especially Robot Framework
• JUnit, Mockito or similar testing frameworks
• Spring Batch or batch processing
• CI/CD tools such as Jenkins or Azure DevOps
• Docker and Kubernetes
• Splunk or other monitoring tools
• Financial services, banking, insurance, pension or other business‑critical industries
• Payment, billing or transaction processing systems

We believe you'll thrive in this role if you have experience with

• Java and Spring Boot backend development
• Integration‑heavy environments
• Long‑term ownership of production systems
• Troubleshooting production incidents
• Application Management Services (AMS)
• Batch processing
• Testing and test automation
• Close collaboration with business stakeholders

Rather than looking for someone with experience only in modern greenfield development, we're particularly interested in developers who understand what it takes to build, maintain and continuously improve systems that thousands of users rely on every day.

• Strong experience with Java backend development
• Experience with Spring and/or Spring Boot
• Experience developing REST APIs
• Good SQL skills (SQL Server, PostgreSQL, Oracle or similar)
• Experience working with integrations
• Experience maintaining business‑critical production systems
• Experience with production support, incident management or problem management
• Experience writing unit, integration and API tests as part of the development process
• Fluent Finnish language skills