Senior Java Software Engineer – AI-Driven Modernisation

15 godzin temu

Poznań wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat
Senior Java Software Engineer – AI-Driven Modernisation (f/m/x)Miejsce pracy: PoznańTechnologies we useExpected
  • Java
  • AI
  • LLM
  • GitHub Copilot
  • Claude Code
About the project

We’re building a next-generation technology team focused on modernising critical financial services through AI-first engineering. You’ll play a key role in transforming complex legacy systems into modern, scalable, and intelligent solutions. You’ll work hands-on with the latest AI tools to accelerate development, improve code quality, and deliver measurable impact across the organization.

Your responsibilities
  • Modernizing legacy systems using AI to analyze, refactor, and optimize existing codebases
  • Implementing modern architecture patterns, including strangler fig and microservices migration approaches
  • Delivering production-ready services with robust testing, clear documentation, and multi-instance deployment support
  • Using AI tools throughout the SDLC to boost productivity and ensure faster delivery cycles
  • Collaborating with cross-functional teams to ensure smooth service transition and ownership handover
  • Demonstrating measurable improvements in performance, reliability, and API efficiency
Our requirements
  • Minimum 7 years of professional experience in Java programming
  • Experience with legacy system refactoring or service modernization projects
  • Hands-on experience with AI-powered development tools (e.g., GitHub Copilot, Claude Code, or similar LLMs)
  • Solid understanding of CI/CD, automated testing, and cloud-native architectures
  • Ability to design scalable, secure, and maintainable software solutions
  • Willingness to travel to Krakow for short business delegations as needed
  • Excellent command of English, both written and spoken, enabling effective communication in an international environment
  • Residing in Poland required
What we offer
  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People
Recruitment stages
  • Send your CV
  • Talk to us about your expectations
  • Learn more about our projects and choose the best
  • Start your adventure with Sii
Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

  • Senior Java Software Engineer – AI-Driven Modernisation

    15 godzin temu

    Poznań, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Senior Java Software Engineer – AI-Driven ModernisationMiejsce pracy: PoznańTechnologies we useExpectedJavaAILLMGitHub CopilotClaude CodeAbout the projectWe’re building a next-generation technology team focused on modernising critical financial services through AI-first engineering. You’ll play a key role in transforming complex legacy systems into...

  • Senior Java Software Engineer – AI-Driven Modernisation

    15 godzin temu

    Piła, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Senior Java Software Engineer – AI-Driven Modernisation (f/m/x)Miejsce pracy: PiłaTechnologies we useExpectedJavaAILLMGitHub CopilotClaude CodeAbout the projectWe’re building a next-generation technology team focused on modernising critical financial services through AI-first engineering. You’ll play a key role in transforming complex legacy systems...

  • Senior Java Software Engineer – AI-Driven Modernisation

    15 godzin temu

    Piła, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Senior Java Software Engineer – AI-Driven ModernisationMiejsce pracy: PiłaTechnologies we useExpectedJavaAILLMGitHub CopilotClaude CodeAbout the projectWe’re building a next-generation technology team focused on modernising critical financial services through AI-first engineering. You’ll play a key role in transforming complex legacy systems into...

  • Senior/Lead Software Engineer

    2 tygodni temu

    Poznań, wielkopolskie, wielkopolskie, Polska ADDEPTO Pełny etat

    Senior/Lead Software EngineerMiejsce pracy: PoznańTechnologies we useExpectedJavaOracleKafkaKubernetesWebLogic ServerDDDRESTfull APIMicrosoft AzureOperating systemWindowsmacOSAbout the projectWe are looking for a visionary and hands-on Senior/Lead Software Engineer to design and guide the implementation of robust, scalable, and secure software solutions....

  • Java Developer – AI project

    15 godzin temu

    Poznań, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Java Developer – AI projectMiejsce pracy: PoznańTechnologies we useExpectedJavaApache KafkaRedisAWSOptionalAIAbout the projectAt Sii, we are looking for a Java Developer to join an innovative AI-driven fraud-prevention initiative delivered together with our global telecom client - a company best known worldwide for its cloud communications APIs enabling...

  • Senior Test Automation Engineer with Java and Kafka

    15 godzin temu

    Poznań, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Senior Test Automation Engineer with Java and KafkaMiejsce pracy: PoznańTechnologies we useExpectedJavaSeleniumCucumberJunitApache KafkaRESTgRPCGraphQLGitJenkinsOptionalPrometheusGrafanaELK StackDynatraceAbout the projectWe are looking for a detail-oriented Senior Test Automation Engineer to join our Scrum team developing next-generation e-commerce backend...

  • Senior Java Banking Developer

    3 tygodni temu

    Poznań, wielkopolskie, wielkopolskie, Polska Capgemini Polska Pełny etat

    Senior Java Banking DeveloperMiejsce pracy: PoznańTechnologies we useExpectedJavaSpring FrameworkOptionalAWSMicrosoft AzureNoSQLBig Data / Data ScienceUNIXAbout the projectA dynamic project portfolio development characterizes our company. One sector we provide services for is Banking and Capital Markets. Therefore, we are looking for experienced Software...

  • Java Developer – AI project

    15 godzin temu

    Piła, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Java Developer – AI projectMiejsce pracy: PiłaTechnologies we useExpectedJavaApache KafkaRedisAWSOptionalAIAbout the projectAt Sii, we are looking for a Java Developer to join an innovative AI-driven fraud-prevention initiative delivered together with our global telecom client - a company best known worldwide for its cloud communications APIs enabling...

  • Senior Software Engineer

    15 godzin temu

    Poznań, wielkopolskie, wielkopolskie, Polska Phoenix Contact Business Services Sp. z o.o Pełny etat

    Senior Software Engineer (f/m)Miejsce pracy: PoznańTechnologies we useExpectedC#.NETPythonOperating systemWindowsAbout the projectWe are seeking an experienced Senior Software Engineer to expand our software development capabilities in the field of industrial marking systems.On an international level, you will collaborate with internal and external project...

  • Java Developer with AI – pharmaceutical industry

    15 godzin temu

    Poznań, wielkopolskie, wielkopolskie, Polska Sii Sp. z o.o. Pełny etat

    Java Developer with AI – pharmaceutical industry (f/m/x)Miejsce pracy: PoznańTechnologies we useExpectedJava 17+AWSSpirng BootSQLSOLID PrinciplesGrafanaAbout the projectWe are looking for an experienced Java Developer to work on innovative solutions in the pharmaceutical industry. Our systems support clinicians and patients worldwide, leveraging...