Senior Fullstack Consultant (Java & React)

GFT Technologies SE; Kraków; Hybrid; PLN 172,000 - 220,000; Full time

Benefits offered by this job

Competitive salary

Ambitious projects

Career growth opportunities

Job summary

GFT Poland is seeking a Senior Fullstack Consultant to design and deliver large-scale financial platforms. You will develop enterprise-grade frontend using React/TypeScript and backend services with Java/Spring Boot, while steering cloud-native solutions on Kubernetes.

This role requires collaboration with cross-functional teams in a hybrid Kraków office. Experience in distributed systems, Kafka events, and CI/CD pipelines is essential, as is a strong emphasis on performance, security, and agile

Qualifications

• 7+ years of professional software development experience in enterprise environments.
• Deep knowledge of React hooks, Context API, Redux Toolkit, routing and performance.
• Hands-on with Vite and/or Webpack; strong Java and Spring Boot experience.

Responsibilities

• Design and develop enterprise frontend applications using React and TypeScript.
• Build and maintain backend services with Java, Spring Boot, and microservices.
• Develop cloud-native solutions deployed on Kubernetes platforms.
• Design event-driven integrations using Apache Kafka.
• Create and maintain CI/CD pipelines in GitLab.
• Collaborate with business stakeholders, architects and Agile teams.
• Optimize performance, scalability and reliability of applications.
• Contribute to technical design, code reviews and engineering standards.
• Support modernization and process automation initiatives.

Skills

React

TypeScript

Java

Spring Boot

Microservices

Kubernetes

Kafka

GitLab CI/CD

Agile/Scrum

Distributed systems

SOLID principles

Design patterns

Tools

Vite

Webpack

OpenAPI/Swagger

GraphQL

PostgreSQL

Oracle

Job description

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Senior Fullstack Consultant (Java & React)

Location: Kraków, PL, 30-302

Working place: Hybrid

Working Location:

Type of contract: B2B contract

Salary range: 125 - 160 PLN/H

What will you do?

You will work on large-scale financial services platforms supporting investment banking operations and digital transformation initiatives in a highly regulated environment. The role combines frontend and backend development, cloud-native engineering, and collaboration with business and technology stakeholders to deliver scalable, resilient, and high-performing solutions.

• Design and develop enterprise-grade frontend applications using React and TypeScript
• Build and maintain backend services based on Java, Spring Boot, and microservices architecture
• Develop and support cloud-native solutions deployed on Kubernetes platforms
• Design and implement event-driven integrations using Apache Kafka
• Create and maintain CI/CD pipelines in GitLab
• Collaborate with business stakeholders, architects, and cross-functional Agile teams
• Optimize application performance, scalability, and reliability
• Contribute to technical design, code reviews, and engineering best practices
• Support application modernization and process automation initiatives

Requirements

• 7+ years of professional software development experience in enterprise environments
• Deep understanding of React Hooks, Context API, Redux Toolkit, routing, and frontend performance optimization
• Hands-on experience with Vite and/or Webpack
• Strong experience with Java 17+ and Spring Boot 3+
• Experience with Spring Security, Spring Data JPA, REST APIs, and microservices
• Excellent knowledge of multithreading, concurrency, JVM tuning, and performance optimization
• Practical experience with Apache Kafka and event-driven architectures
• Experience with Kubernetes, Helm, and Terraform
• Experience creating and maintaining GitLab CI/CD pipelines
• Strong understanding of distributed systems, scalability, resiliency, and fault tolerance
• Knowledge of SOLID principles, design patterns, clean architecture, TDD, and secure coding practices
• Strong communication and collaboration skills
• Experience working in Agile/Scrum environments
• Openness to work hybrid from our clint's office (Kraków) 3 days a week

Nice to have

• Experience with AI-assisted development tools such as GitHub Copilot or Microsoft Copilot
• Experience with Oracle or PostgreSQL databases
• Familiarity with Azure cloud services
• Knowledge of Grafana, Prometheus, Splunk, Dynatrace, ELK, or OpenSearch
• Experience with OpenAPI/Swagger and GraphQL
• Strong testing background using JUnit 5, Mockito, TestContainers, Playwright, Cypress, or React Testing Library
• Experience mentoring developers and contributing to engineering standards and architecture decisions

We are GFT Poland. WE KNOW how to tackle complex issues with innovative approach to deliver the highest value. Our reputation has been built around one simple rule: we do not overpromise, WE DELIVER. We deliver to our employees, clients and partners. WE GROW as you grow, so investing in you is our business strategy. Caring for each other is our priority. WE CARE who you are, what you need, how you feel. WE CARE to smile, have fun and develop as human beings.

Why Choose GFT?

• A culture of top performance
• Deep tech IT engineering & consulting
• 1200 skilled & top-class experts
• 77% of the team are regular/senior
• Products that contribute to a sustainable world
• Competitive salary and benefits
• Ambitious projects, trainings and tools you need to flourish
• Google Cloud Partner of the Year - for going above and beyond for customers