Expert Fullstack Consultant (Java & React)

GFT Technologies • IT Outsourcing & Dedicated Teams • Custom Software Development • 3 days a week in the office • Paid as a contractor rate • JavaScript • Java • Kotlin • TypeScript • C# • 24 days ago
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Salary
$80k – $106k per year
Location
Hybrid (Kraków, Poland)
Seniority
Senior

Confirmed on the employer's own hiring board on Oct 17, 2026. First seen by Alion on Sep 23, 2026.

Overview
Company
Impact
Profile match

GFT Technologies

GFT Technologies is a Stuttgart company founded in 1987 that builds software for banks, insurers and industrial firms. Its engineers work on core banking modernisation, cloud migration and artificial intelligence projects for financial institutions worldwide. The company operates delivery centres across Europe, Latin America and Asia.
gft.com • HQ: Stuttgart, Germany • IT Outsourcing & Dedicated Teams • Custom Software Development • Cloud Consulting & Migration • Financial Software & Embedded Finance • IT Consulting & Digital Transformation • 1001-5000 employees • Est. 1987
Tech stack of GFT Technologies

Type of contract: B2B contract

Salary range: 155 - 205 PLN/H

What will you do?

You will work on large-scale financial services platforms supporting investment banking operations. The role focuses on digital transformation, process automation, data integration, and application modernization in a highly regulated environment. You will contribute across both backend and frontend development while leveraging modern cloud-native technologies, AI engineering tools, and DevOps practices.

Your tasks

  • Design and develop scalable microservices-based applications using Java and Spring Boot
  • Build and maintain modern frontend solutions using React and TypeScript
  • Implement and optimize integrations with PostgreSQL and Kafka
  • Collaborate with business stakeholders and development teams to deliver high-quality solutions
  • Develop and maintain automated tests ensuring application quality and reliability
  • Deploy and support applications running on Kubernetes platforms
  • Create and maintain CI/CD pipelines using GitLab
  • Participate in application modernization and process automation initiatives
  • Contribute to technical discussions and architectural decisions
  • Utilize AI engineering tools to improve development efficiency

Requirements

  • Strong backend development experience using Java 17+ and Spring Boot 3+
  • Experience designing and developing microservices-based architectures
  • Good knowledge of PostgreSQL
  • Good knowledge of Kafka
  • Strong frontend development expertise using ReactJS, Redux, TypeScript, HTML5, CSS3 and modern JavaScript (ES6+)
  • Experience with .NET and C#
  • Experience with AI engineering tools such as GHCP CLI
  • Understanding of Generative AI concepts and frontier models
  • Strong communication skills
  • Strong domain knowledge of Stock Borrow Loan business
  • Experience with automated testing using JUnit 5, Mockito, Testcontainers or similar tools
  • Understanding of structured context in codebases such as AGENTS.md and skills
  • Practical knowledge of Kubernetes, Helm and Terraform
  • Experience with GitLab CI/CD pipelines for build, test, packaging and deployment automation
  • Openness to work hybrid from our client's office (Kraków) 3 days a week

Nice to have

  • Splunk
  • Grafana
  • Application Insights
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