Expert Fullstack Consultant (Java & React)

GFT · Kraków, Poland · On site · September 23, 2026

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Posted September 23, 2026 · Read from GFT
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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

Employer
GFT
Location
Kraków, Poland · On site