Senior Fullstack Engineer (Java & React)

GFT TECHNOLOGIES SE

Kraków

On-site

PLN 163,000 - 249,000

Full time

34 hours ago

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Benefits offered by this job

Hybrid work in Kraków office

Medical, sport, lunch subsidy

Online training & certifications

Social events

Job summary

GFT Poland is seeking an senior software engineer to drive frontend and backend development for large-scale financial services platforms. Hybrid work in Kraków, with deep involvement in scalable and secure cloud-native solutions.

The role requires 7+ years in enterprise software, expert Java/Spring Boot experience, React/TypeScript proficiency, and strong knowledge of Kubernetes, Kafka, and CI/CD pipelines. You will mentor teams and shape architectural decisions.

Qualifications

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.

Responsibilities

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 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.

Skills

Soft skills

Agile/Scrum

Communication

Mentoring

Team collaboration

Problem solving

Leadership

Tools

React

TypeScript

Java

Spring Boot

Kubernetes

Terraform

Helm

Apache Kafka

REST APIs

JVM tuning

Spring Security

Microservices

OpenAPI/Swagger

Job description

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Date: Sep 23, 2026

Location:

Kraków, PL, 30-302

Working place: Hybrid

Working Location:

Type of contract: Employment contract

Salary range: 14600 - 22300 PLN gross

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
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

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 offer

Hybrid work in our client's office (Kraków) 3 days a week
Working in a highly experienced and dedicated team
Benefit package tailored to your needs (medical, sport, lunch subsidy, life insurance, etc.)
Online training and certifications
Access to e-learning platform
Social events

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?