Senior Java/React Engineer — AI-Enabled Platform Leader

Luxoft Poland; Kraków; Hybrid; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Private Medical & Dental care & Life保险

MyBenefit program (sports card, well‑n

Internal Mobility program - rotation

Job summary

Luxoft Poland is seeking a senior Full-Stack Developer (Java + React) to join our client's team in a hybrid mode across Kraków and other Polish cities. You will help build a new AI-enabled application platform for investment banking, focusing on clean code, agile methods and high-quality delivery.

You will design back-end services with Java Spring Boot, craft responsive frontends in React/TypeScript, and integrate generative AI features, including LLM APIs.

Qualifications

• 8+ years of professional software development experience, including long-term projects.
• Strong hands-on experience with Java (Java 11+) and Spring / Spring Boot.
• Proven experience delivering full-stack features end-to-end from UI to back-end services and database.
• Hands-on experience with AI coding assistants (GitHub Copilot or similar) in daily development.
• Knowledge of generative AI and prompt engineering, including integrating LLM APIs (OpenAI/Azure) into applications.
• Strong SQL skills and experience with relational databases.
• Experience in automated testing (JUnit, Jest, React Testing Library).
• Familiarity with CI/CD pipelines and Git-based workflows.
• Excellent problem-solving and communication skills.
• Familiarity with agile practices (Scrum, Kanban).

Responsibilities

• Design, develop and maintain scalable back-end services and APIs using Java (Spring Boot).
• Build responsive, high-performance front-end applications using React and TypeScript.
• Use AI-assisted development tools to speed up delivery while ensuring quality and security.
• Design and integrate generative AI features, including prompt engineering and LLM integration.
• Define and consume RESTful APIs, communicating requirements across teams.
• Mentor developers and raise the team’s technical level through code reviews and pair programming.
• Translate business requirements into robust end-to-end solutions.
• Apply clean code principles and improve CI/CD pipelines and tooling.
• Write and maintain automated tests (unit, integration, end-to-end).
• Participate in agile ceremonies and collaborate with QA, PMs, architects and stakeholders.

Skills

Java

Spring Boot

React

TypeScript

GitHub Copilot

AI in development

SQL

JUnit

Jest

CI/CD

Agile practices

Communication

Tools

GitHub Copilot

CI/CD pipelines

Unix/Linux

Job description

Luxoft Poland is seeking a senior Full-Stack Developer (Java + React) to join our client's team in a hybrid mode across Kraków and other Polish cities. You will help build a new AI-enabled application platform for investment banking, focusing on clean code, agile methods and high-quality delivery.

You will design back-end services with Java Spring Boot, craft responsive frontends in React/TypeScript, and integrate generative AI features, including LLM APIs.