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