🟠Senior Full Stack (Java/React) Engineer🟠

🟠 Join us in Luxoft! 🏦Flexible working hours 🩺Private Medical & Dental care & Life Insurance 💰 Paid Referrals 🏋🏽 MyBenefit program (sports card, well-being program etc.) 🌎 Internal Mobility program - possibility of rotation between projects, locations, accounts 🎓 LuxTalent platform (webinars, training, courses) 🟠 Project Description We're looking for a senior Full-Stack Developer (Java + React) to join our client's team and help build a new AI-enabled application platform. The team works with modern AI-assisted tools such as GitHub Copilot and generative AI, and cares about clean code, agile methods and high-quality delivery. The client is in the investment banking industry, and the platform supports collateral and margin management. 🟠 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 such as GitHub Copilot to speed up delivery while keeping quality and security high -Design and integrate generative AI features into business applications, including prompt engineering, LLM integration and evaluation of model outputs -Define and consume RESTful APIs, and communicate requirements and constraints clearly across teams -Advise and guide the team on architecture, design decisions and best practices, including the responsible use of AI tools -Mentor developers and raise the team's technical level through code reviews and pair programming -Translate business and product requirements into robust end-to-end technical solutions -Apply clean code principles and help improve engineering standards, tooling and CI/CD pipelines -Write and maintain automated tests (unit, integration, end-to-end) on both front end and back end -Take an active part in agile ceremonies (Scrum/Kanban), including refinement, planning, reviews and retrospectives -Work closely with QA, product managers, architects and business stakeholders to deliver high-quality work that fits business needs -Support and improve existing applications in a fast-paced, enterprise investment-banking environment 🟠 Skills What is relevant to have -At least 8 years of professional software development experience, including long-term projects -Strong hands-on experience with Java (Java 11+) and Spring / Spring Boot -Strong hands-on experience with React, TypeScript/JavaScript, HTML and CSS -Proven experience delivering full-stack features end to end, from UI to back-end services and the database -Hands-on experience with GitHub Copilot or similar AI coding assistants in daily development -Practical knowledge of generative AI and prompt engineering, including integrating LLM APIs (e.g. -OpenAI, Azure OpenAI) into applications -Strong SQL skills and experience with relational databases -Experience in automated testing (JUnit, Jest, React Testing Library or similar) -Familiarity with CI/CD pipelines and Git-based workflows -Clean coding skills -Excellent problem-solving skills -Familiarity with agile practices (Scrum, Kanban, etc.) -Good communication skills and the ability to state requirements clearly to other teams What is nice to have -Hands-on experience with Sybase (ASE and/or IQ), including stored procedures and performance tuning -Knowledge of the collateral management and margin domain (e.g. margin calls, ISDA/CSA, initial and variation margin, SIMM) -Experience in investment banking or capital markets -Exposure to RAG architectures, vector databases or AI agent frameworks -Working knowledge of Unix/Linux and shell scripting 🟠 Languages English: C1 Advanced 🟠 Seniority Senior 🟠 Work mode hybrid in Krakow, Wrocław, Gdansk or Warsaw