Senior Fullstack Engineer (Java & React)

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.

Your tasks

• 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

Your skills

• 7+ years of professional software development experience in enterprise environments
• Strong expertise in ReactJS, Redux, TypeScript, HTML5, CSS3, and modern JavaScript
• 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?

• 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